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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 1991, 1992 Linus Torvalds
- */
- /*
- * Hopefully this will be a rather complete VT102 implementation.
- *
- * Beeping thanks to John T Kohl.
- *
- * Virtual Consoles, Screen Blanking, Screen Dumping, Color, Graphics
- * Chars, and VT100 enhancements by Peter MacDonald.
- *
- * Copy and paste function by Andrew Haylett,
- * some enhancements by Alessandro Rubini.
- *
- * Code to check for different video-cards mostly by Galen Hunt,
- * <[email protected]>
- *
- * Rudimentary ISO 10646/Unicode/UTF-8 character set support by
- * Markus Kuhn, <[email protected]>.
- *
- * Dynamic allocation of consoles, [email protected], May 1994
- * Resizing of consoles, aeb, 940926
- *
- * Code for xterm like mouse click reporting by Peter Orbaek 20-Jul-94
- * <[email protected]>
- *
- * User-defined bell sound, new setterm control sequences and printk
- * redirection by Martin Mares <[email protected]> 19-Nov-95
- *
- * APM screenblank bug fixed Takashi Manabe <[email protected]>
- *
- * Merge with the abstract console driver by Geert Uytterhoeven
- * <[email protected]>, Jan 1997.
- *
- * Original m68k console driver modifications by
- *
- * - Arno Griffioen <[email protected]>
- * - David Carter <[email protected]>
- *
- * The abstract console driver provides a generic interface for a text
- * console. It supports VGA text mode, frame buffer based graphical consoles
- * and special graphics processors that are only accessible through some
- * registers (e.g. a TMS340x0 GSP).
- *
- * The interface to the hardware is specified using a special structure
- * (struct consw) which contains function pointers to console operations
- * (see <linux/console.h> for more information).
- *
- * Support for changeable cursor shape
- * by Pavel Machek <[email protected]>, August 1997
- *
- * Ported to i386 and con_scrolldelta fixed
- * by Emmanuel Marty <[email protected]>, April 1998
- *
- * Resurrected character buffers in videoram plus lots of other trickery
- * by Martin Mares <[email protected]>, July 1998
- *
- * Removed old-style timers, introduced console_timer, made timer
- * deletion SMP-safe. 17Jun00, Andrew Morton
- *
- * Removed console_lock, enabled interrupts across all console operations
- * 13 March 2001, Andrew Morton
- *
- * Fixed UTF-8 mode so alternate charset modes always work according
- * to control sequences interpreted in do_con_trol function
- * preserving backward VT100 semigraphics compatibility,
- * malformed UTF sequences represented as sequences of replacement glyphs,
- * original codes or '?' as a last resort if replacement glyph is undefined
- * by Adam Tla/lka <[email protected]>, Aug 2006
- */
- #include <linux/module.h>
- #include <linux/types.h>
- #include <linux/sched/signal.h>
- #include <linux/tty.h>
- #include <linux/tty_flip.h>
- #include <linux/kernel.h>
- #include <linux/string.h>
- #include <linux/errno.h>
- #include <linux/kd.h>
- #include <linux/slab.h>
- #include <linux/vmalloc.h>
- #include <linux/major.h>
- #include <linux/mm.h>
- #include <linux/console.h>
- #include <linux/init.h>
- #include <linux/mutex.h>
- #include <linux/vt_kern.h>
- #include <linux/selection.h>
- #include <linux/tiocl.h>
- #include <linux/kbd_kern.h>
- #include <linux/consolemap.h>
- #include <linux/timer.h>
- #include <linux/interrupt.h>
- #include <linux/workqueue.h>
- #include <linux/pm.h>
- #include <linux/font.h>
- #include <linux/bitops.h>
- #include <linux/notifier.h>
- #include <linux/device.h>
- #include <linux/io.h>
- #include <linux/uaccess.h>
- #include <linux/kdb.h>
- #include <linux/ctype.h>
- #include <linux/bsearch.h>
- #include <linux/gcd.h>
- #define MAX_NR_CON_DRIVER 16
- #define CON_DRIVER_FLAG_MODULE 1
- #define CON_DRIVER_FLAG_INIT 2
- #define CON_DRIVER_FLAG_ATTR 4
- #define CON_DRIVER_FLAG_ZOMBIE 8
- struct con_driver {
- const struct consw *con;
- const char *desc;
- struct device *dev;
- int node;
- int first;
- int last;
- int flag;
- };
- static struct con_driver registered_con_driver[MAX_NR_CON_DRIVER];
- const struct consw *conswitchp;
- /*
- * Here is the default bell parameters: 750HZ, 1/8th of a second
- */
- #define DEFAULT_BELL_PITCH 750
- #define DEFAULT_BELL_DURATION (HZ/8)
- #define DEFAULT_CURSOR_BLINK_MS 200
- struct vc vc_cons [MAX_NR_CONSOLES];
- #ifndef VT_SINGLE_DRIVER
- static const struct consw *con_driver_map[MAX_NR_CONSOLES];
- #endif
- static int con_open(struct tty_struct *, struct file *);
- static void vc_init(struct vc_data *vc, unsigned int rows,
- unsigned int cols, int do_clear);
- static void gotoxy(struct vc_data *vc, int new_x, int new_y);
- static void save_cur(struct vc_data *vc);
- static void reset_terminal(struct vc_data *vc, int do_clear);
- static void con_flush_chars(struct tty_struct *tty);
- static int set_vesa_blanking(char __user *p);
- static void set_cursor(struct vc_data *vc);
- static void hide_cursor(struct vc_data *vc);
- static void console_callback(struct work_struct *ignored);
- static void con_driver_unregister_callback(struct work_struct *ignored);
- static void blank_screen_t(struct timer_list *unused);
- static void set_palette(struct vc_data *vc);
- static void unblank_screen(void);
- #define vt_get_kmsg_redirect() vt_kmsg_redirect(-1)
- int default_utf8 = true;
- module_param(default_utf8, int, S_IRUGO | S_IWUSR);
- int global_cursor_default = -1;
- module_param(global_cursor_default, int, S_IRUGO | S_IWUSR);
- static int cur_default = CUR_UNDERLINE;
- module_param(cur_default, int, S_IRUGO | S_IWUSR);
- /*
- * ignore_poke: don't unblank the screen when things are typed. This is
- * mainly for the privacy of braille terminal users.
- */
- static int ignore_poke;
- int do_poke_blanked_console;
- int console_blanked;
- static int vesa_blank_mode; /* 0:none 1:suspendV 2:suspendH 3:powerdown */
- static int vesa_off_interval;
- static int blankinterval;
- core_param(consoleblank, blankinterval, int, 0444);
- static DECLARE_WORK(console_work, console_callback);
- static DECLARE_WORK(con_driver_unregister_work, con_driver_unregister_callback);
- /*
- * fg_console is the current virtual console,
- * last_console is the last used one,
- * want_console is the console we want to switch to,
- * saved_* variants are for save/restore around kernel debugger enter/leave
- */
- int fg_console;
- int last_console;
- int want_console = -1;
- static int saved_fg_console;
- static int saved_last_console;
- static int saved_want_console;
- static int saved_vc_mode;
- static int saved_console_blanked;
- /*
- * For each existing display, we have a pointer to console currently visible
- * on that display, allowing consoles other than fg_console to be refreshed
- * appropriately. Unless the low-level driver supplies its own display_fg
- * variable, we use this one for the "master display".
- */
- static struct vc_data *master_display_fg;
- /*
- * Unfortunately, we need to delay tty echo when we're currently writing to the
- * console since the code is (and always was) not re-entrant, so we schedule
- * all flip requests to process context with schedule-task() and run it from
- * console_callback().
- */
- /*
- * For the same reason, we defer scrollback to the console callback.
- */
- static int scrollback_delta;
- /*
- * Hook so that the power management routines can (un)blank
- * the console on our behalf.
- */
- int (*console_blank_hook)(int);
- static DEFINE_TIMER(console_timer, blank_screen_t);
- static int blank_state;
- static int blank_timer_expired;
- enum {
- blank_off = 0,
- blank_normal_wait,
- blank_vesa_wait,
- };
- /*
- * /sys/class/tty/tty0/
- *
- * the attribute 'active' contains the name of the current vc
- * console and it supports poll() to detect vc switches
- */
- static struct device *tty0dev;
- /*
- * Notifier list for console events.
- */
- static ATOMIC_NOTIFIER_HEAD(vt_notifier_list);
- int register_vt_notifier(struct notifier_block *nb)
- {
- return atomic_notifier_chain_register(&vt_notifier_list, nb);
- }
- EXPORT_SYMBOL_GPL(register_vt_notifier);
- int unregister_vt_notifier(struct notifier_block *nb)
- {
- return atomic_notifier_chain_unregister(&vt_notifier_list, nb);
- }
- EXPORT_SYMBOL_GPL(unregister_vt_notifier);
- static void notify_write(struct vc_data *vc, unsigned int unicode)
- {
- struct vt_notifier_param param = { .vc = vc, .c = unicode };
- atomic_notifier_call_chain(&vt_notifier_list, VT_WRITE, ¶m);
- }
- static void notify_update(struct vc_data *vc)
- {
- struct vt_notifier_param param = { .vc = vc };
- atomic_notifier_call_chain(&vt_notifier_list, VT_UPDATE, ¶m);
- }
- /*
- * Low-Level Functions
- */
- static inline bool con_is_fg(const struct vc_data *vc)
- {
- return vc->vc_num == fg_console;
- }
- static inline bool con_should_update(const struct vc_data *vc)
- {
- return con_is_visible(vc) && !console_blanked;
- }
- static inline unsigned short *screenpos(const struct vc_data *vc, int offset,
- bool viewed)
- {
- unsigned short *p;
-
- if (!viewed)
- p = (unsigned short *)(vc->vc_origin + offset);
- else if (!vc->vc_sw->con_screen_pos)
- p = (unsigned short *)(vc->vc_visible_origin + offset);
- else
- p = vc->vc_sw->con_screen_pos(vc, offset);
- return p;
- }
- /* Called from the keyboard irq path.. */
- static inline void scrolldelta(int lines)
- {
- /* FIXME */
- /* scrolldelta needs some kind of consistency lock, but the BKL was
- and still is not protecting versus the scheduled back end */
- scrollback_delta += lines;
- schedule_console_callback();
- }
- void schedule_console_callback(void)
- {
- schedule_work(&console_work);
- }
- /*
- * Code to manage unicode-based screen buffers
- */
- #ifdef NO_VC_UNI_SCREEN
- /* this disables and optimizes related code away at compile time */
- #define get_vc_uniscr(vc) NULL
- #else
- #define get_vc_uniscr(vc) vc->vc_uni_screen
- #endif
- #define VC_UNI_SCREEN_DEBUG 0
- typedef uint32_t char32_t;
- /*
- * Our screen buffer is preceded by an array of line pointers so that
- * scrolling only implies some pointer shuffling.
- */
- struct uni_screen {
- char32_t *lines[0];
- };
- static struct uni_screen *vc_uniscr_alloc(unsigned int cols, unsigned int rows)
- {
- struct uni_screen *uniscr;
- void *p;
- unsigned int memsize, i;
- /* allocate everything in one go */
- memsize = cols * rows * sizeof(char32_t);
- memsize += rows * sizeof(char32_t *);
- p = vzalloc(memsize);
- if (!p)
- return NULL;
- /* initial line pointers */
- uniscr = p;
- p = uniscr->lines + rows;
- for (i = 0; i < rows; i++) {
- uniscr->lines[i] = p;
- p += cols * sizeof(char32_t);
- }
- return uniscr;
- }
- static void vc_uniscr_free(struct uni_screen *uniscr)
- {
- vfree(uniscr);
- }
- static void vc_uniscr_set(struct vc_data *vc, struct uni_screen *new_uniscr)
- {
- vc_uniscr_free(vc->vc_uni_screen);
- vc->vc_uni_screen = new_uniscr;
- }
- static void vc_uniscr_putc(struct vc_data *vc, char32_t uc)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr)
- uniscr->lines[vc->state.y][vc->state.x] = uc;
- }
- static void vc_uniscr_insert(struct vc_data *vc, unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
- unsigned int x = vc->state.x, cols = vc->vc_cols;
- memmove(&ln[x + nr], &ln[x], (cols - x - nr) * sizeof(*ln));
- memset32(&ln[x], ' ', nr);
- }
- }
- static void vc_uniscr_delete(struct vc_data *vc, unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
- unsigned int x = vc->state.x, cols = vc->vc_cols;
- memcpy(&ln[x], &ln[x + nr], (cols - x - nr) * sizeof(*ln));
- memset32(&ln[cols - nr], ' ', nr);
- }
- }
- static void vc_uniscr_clear_line(struct vc_data *vc, unsigned int x,
- unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr) {
- char32_t *ln = uniscr->lines[vc->state.y];
- memset32(&ln[x], ' ', nr);
- }
- }
- static void vc_uniscr_clear_lines(struct vc_data *vc, unsigned int y,
- unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr) {
- unsigned int cols = vc->vc_cols;
- while (nr--)
- memset32(uniscr->lines[y++], ' ', cols);
- }
- }
- static void vc_uniscr_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
- enum con_scroll dir, unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr) {
- unsigned int i, j, k, sz, d, clear;
- sz = b - t;
- clear = b - nr;
- d = nr;
- if (dir == SM_DOWN) {
- clear = t;
- d = sz - nr;
- }
- for (i = 0; i < gcd(d, sz); i++) {
- char32_t *tmp = uniscr->lines[t + i];
- j = i;
- while (1) {
- k = j + d;
- if (k >= sz)
- k -= sz;
- if (k == i)
- break;
- uniscr->lines[t + j] = uniscr->lines[t + k];
- j = k;
- }
- uniscr->lines[t + j] = tmp;
- }
- vc_uniscr_clear_lines(vc, clear, nr);
- }
- }
- static void vc_uniscr_copy_area(struct uni_screen *dst,
- unsigned int dst_cols,
- unsigned int dst_rows,
- struct uni_screen *src,
- unsigned int src_cols,
- unsigned int src_top_row,
- unsigned int src_bot_row)
- {
- unsigned int dst_row = 0;
- if (!dst)
- return;
- while (src_top_row < src_bot_row) {
- char32_t *src_line = src->lines[src_top_row];
- char32_t *dst_line = dst->lines[dst_row];
- memcpy(dst_line, src_line, src_cols * sizeof(char32_t));
- if (dst_cols - src_cols)
- memset32(dst_line + src_cols, ' ', dst_cols - src_cols);
- src_top_row++;
- dst_row++;
- }
- while (dst_row < dst_rows) {
- char32_t *dst_line = dst->lines[dst_row];
- memset32(dst_line, ' ', dst_cols);
- dst_row++;
- }
- }
- /*
- * Called from vcs_read() to make sure unicode screen retrieval is possible.
- * This will initialize the unicode screen buffer if not already done.
- * This returns 0 if OK, or a negative error code otherwise.
- * In particular, -ENODATA is returned if the console is not in UTF-8 mode.
- */
- int vc_uniscr_check(struct vc_data *vc)
- {
- struct uni_screen *uniscr;
- unsigned short *p;
- int x, y, mask;
- if (__is_defined(NO_VC_UNI_SCREEN))
- return -EOPNOTSUPP;
- WARN_CONSOLE_UNLOCKED();
- if (!vc->vc_utf)
- return -ENODATA;
- if (vc->vc_uni_screen)
- return 0;
- uniscr = vc_uniscr_alloc(vc->vc_cols, vc->vc_rows);
- if (!uniscr)
- return -ENOMEM;
- /*
- * Let's populate it initially with (imperfect) reverse translation.
- * This is the next best thing we can do short of having it enabled
- * from the start even when no users rely on this functionality. True
- * unicode content will be available after a complete screen refresh.
- */
- p = (unsigned short *)vc->vc_origin;
- mask = vc->vc_hi_font_mask | 0xff;
- for (y = 0; y < vc->vc_rows; y++) {
- char32_t *line = uniscr->lines[y];
- for (x = 0; x < vc->vc_cols; x++) {
- u16 glyph = scr_readw(p++) & mask;
- line[x] = inverse_translate(vc, glyph, true);
- }
- }
- vc->vc_uni_screen = uniscr;
- return 0;
- }
- /*
- * Called from vcs_read() to get the unicode data from the screen.
- * This must be preceded by a successful call to vc_uniscr_check() once
- * the console lock has been taken.
- */
- void vc_uniscr_copy_line(const struct vc_data *vc, void *dest, bool viewed,
- unsigned int row, unsigned int col, unsigned int nr)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- int offset = row * vc->vc_size_row + col * 2;
- unsigned long pos;
- BUG_ON(!uniscr);
- pos = (unsigned long)screenpos(vc, offset, viewed);
- if (pos >= vc->vc_origin && pos < vc->vc_scr_end) {
- /*
- * Desired position falls in the main screen buffer.
- * However the actual row/col might be different if
- * scrollback is active.
- */
- row = (pos - vc->vc_origin) / vc->vc_size_row;
- col = ((pos - vc->vc_origin) % vc->vc_size_row) / 2;
- memcpy(dest, &uniscr->lines[row][col], nr * sizeof(char32_t));
- } else {
- /*
- * Scrollback is active. For now let's simply backtranslate
- * the screen glyphs until the unicode screen buffer does
- * synchronize with console display drivers for a scrollback
- * buffer of its own.
- */
- u16 *p = (u16 *)pos;
- int mask = vc->vc_hi_font_mask | 0xff;
- char32_t *uni_buf = dest;
- while (nr--) {
- u16 glyph = scr_readw(p++) & mask;
- *uni_buf++ = inverse_translate(vc, glyph, true);
- }
- }
- }
- /* this is for validation and debugging only */
- static void vc_uniscr_debug_check(struct vc_data *vc)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- unsigned short *p;
- int x, y, mask;
- if (!VC_UNI_SCREEN_DEBUG || !uniscr)
- return;
- WARN_CONSOLE_UNLOCKED();
- /*
- * Make sure our unicode screen translates into the same glyphs
- * as the actual screen. This is brutal indeed.
- */
- p = (unsigned short *)vc->vc_origin;
- mask = vc->vc_hi_font_mask | 0xff;
- for (y = 0; y < vc->vc_rows; y++) {
- char32_t *line = uniscr->lines[y];
- for (x = 0; x < vc->vc_cols; x++) {
- u16 glyph = scr_readw(p++) & mask;
- char32_t uc = line[x];
- int tc = conv_uni_to_pc(vc, uc);
- if (tc == -4)
- tc = conv_uni_to_pc(vc, 0xfffd);
- if (tc == -4)
- tc = conv_uni_to_pc(vc, '?');
- if (tc != glyph)
- pr_err_ratelimited(
- "%s: mismatch at %d,%d: glyph=%#x tc=%#x\n",
- __func__, x, y, glyph, tc);
- }
- }
- }
- static void con_scroll(struct vc_data *vc, unsigned int t, unsigned int b,
- enum con_scroll dir, unsigned int nr)
- {
- u16 *clear, *d, *s;
- if (t + nr >= b)
- nr = b - t - 1;
- if (b > vc->vc_rows || t >= b || nr < 1)
- return;
- vc_uniscr_scroll(vc, t, b, dir, nr);
- if (con_is_visible(vc) && vc->vc_sw->con_scroll(vc, t, b, dir, nr))
- return;
- s = clear = (u16 *)(vc->vc_origin + vc->vc_size_row * t);
- d = (u16 *)(vc->vc_origin + vc->vc_size_row * (t + nr));
- if (dir == SM_UP) {
- clear = s + (b - t - nr) * vc->vc_cols;
- swap(s, d);
- }
- scr_memmovew(d, s, (b - t - nr) * vc->vc_size_row);
- scr_memsetw(clear, vc->vc_video_erase_char, vc->vc_size_row * nr);
- }
- static void do_update_region(struct vc_data *vc, unsigned long start, int count)
- {
- unsigned int xx, yy, offset;
- u16 *p;
- p = (u16 *) start;
- if (!vc->vc_sw->con_getxy) {
- offset = (start - vc->vc_origin) / 2;
- xx = offset % vc->vc_cols;
- yy = offset / vc->vc_cols;
- } else {
- int nxx, nyy;
- start = vc->vc_sw->con_getxy(vc, start, &nxx, &nyy);
- xx = nxx; yy = nyy;
- }
- for(;;) {
- u16 attrib = scr_readw(p) & 0xff00;
- int startx = xx;
- u16 *q = p;
- while (xx < vc->vc_cols && count) {
- if (attrib != (scr_readw(p) & 0xff00)) {
- if (p > q)
- vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
- startx = xx;
- q = p;
- attrib = scr_readw(p) & 0xff00;
- }
- p++;
- xx++;
- count--;
- }
- if (p > q)
- vc->vc_sw->con_putcs(vc, q, p-q, yy, startx);
- if (!count)
- break;
- xx = 0;
- yy++;
- if (vc->vc_sw->con_getxy) {
- p = (u16 *)start;
- start = vc->vc_sw->con_getxy(vc, start, NULL, NULL);
- }
- }
- }
- void update_region(struct vc_data *vc, unsigned long start, int count)
- {
- WARN_CONSOLE_UNLOCKED();
- if (con_should_update(vc)) {
- hide_cursor(vc);
- do_update_region(vc, start, count);
- set_cursor(vc);
- }
- }
- /* Structure of attributes is hardware-dependent */
- static u8 build_attr(struct vc_data *vc, u8 _color,
- enum vc_intensity _intensity, bool _blink, bool _underline,
- bool _reverse, bool _italic)
- {
- if (vc->vc_sw->con_build_attr)
- return vc->vc_sw->con_build_attr(vc, _color, _intensity,
- _blink, _underline, _reverse, _italic);
- /*
- * ++roman: I completely changed the attribute format for monochrome
- * mode (!can_do_color). The formerly used MDA (monochrome display
- * adapter) format didn't allow the combination of certain effects.
- * Now the attribute is just a bit vector:
- * Bit 0..1: intensity (0..2)
- * Bit 2 : underline
- * Bit 3 : reverse
- * Bit 7 : blink
- */
- {
- u8 a = _color;
- if (!vc->vc_can_do_color)
- return _intensity |
- (_italic << 1) |
- (_underline << 2) |
- (_reverse << 3) |
- (_blink << 7);
- if (_italic)
- a = (a & 0xF0) | vc->vc_itcolor;
- else if (_underline)
- a = (a & 0xf0) | vc->vc_ulcolor;
- else if (_intensity == VCI_HALF_BRIGHT)
- a = (a & 0xf0) | vc->vc_halfcolor;
- if (_reverse)
- a = (a & 0x88) | (((a >> 4) | (a << 4)) & 0x77);
- if (_blink)
- a ^= 0x80;
- if (_intensity == VCI_BOLD)
- a ^= 0x08;
- if (vc->vc_hi_font_mask == 0x100)
- a <<= 1;
- return a;
- }
- }
- static void update_attr(struct vc_data *vc)
- {
- vc->vc_attr = build_attr(vc, vc->state.color, vc->state.intensity,
- vc->state.blink, vc->state.underline,
- vc->state.reverse ^ vc->vc_decscnm, vc->state.italic);
- vc->vc_video_erase_char = ' ' | (build_attr(vc, vc->state.color,
- VCI_NORMAL, vc->state.blink, false,
- vc->vc_decscnm, false) << 8);
- }
- /* Note: inverting the screen twice should revert to the original state */
- void invert_screen(struct vc_data *vc, int offset, int count, bool viewed)
- {
- unsigned short *p;
- WARN_CONSOLE_UNLOCKED();
- count /= 2;
- p = screenpos(vc, offset, viewed);
- if (vc->vc_sw->con_invert_region) {
- vc->vc_sw->con_invert_region(vc, p, count);
- } else {
- u16 *q = p;
- int cnt = count;
- u16 a;
- if (!vc->vc_can_do_color) {
- while (cnt--) {
- a = scr_readw(q);
- a ^= 0x0800;
- scr_writew(a, q);
- q++;
- }
- } else if (vc->vc_hi_font_mask == 0x100) {
- while (cnt--) {
- a = scr_readw(q);
- a = (a & 0x11ff) |
- ((a & 0xe000) >> 4) |
- ((a & 0x0e00) << 4);
- scr_writew(a, q);
- q++;
- }
- } else {
- while (cnt--) {
- a = scr_readw(q);
- a = (a & 0x88ff) |
- ((a & 0x7000) >> 4) |
- ((a & 0x0700) << 4);
- scr_writew(a, q);
- q++;
- }
- }
- }
- if (con_should_update(vc))
- do_update_region(vc, (unsigned long) p, count);
- notify_update(vc);
- }
- /* used by selection: complement pointer position */
- void complement_pos(struct vc_data *vc, int offset)
- {
- static int old_offset = -1;
- static unsigned short old;
- static unsigned short oldx, oldy;
- WARN_CONSOLE_UNLOCKED();
- if (old_offset != -1 && old_offset >= 0 &&
- old_offset < vc->vc_screenbuf_size) {
- scr_writew(old, screenpos(vc, old_offset, true));
- if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, old, oldy, oldx);
- notify_update(vc);
- }
- old_offset = offset;
- if (offset != -1 && offset >= 0 &&
- offset < vc->vc_screenbuf_size) {
- unsigned short new;
- unsigned short *p;
- p = screenpos(vc, offset, true);
- old = scr_readw(p);
- new = old ^ vc->vc_complement_mask;
- scr_writew(new, p);
- if (con_should_update(vc)) {
- oldx = (offset >> 1) % vc->vc_cols;
- oldy = (offset >> 1) / vc->vc_cols;
- vc->vc_sw->con_putc(vc, new, oldy, oldx);
- }
- notify_update(vc);
- }
- }
- static void insert_char(struct vc_data *vc, unsigned int nr)
- {
- unsigned short *p = (unsigned short *) vc->vc_pos;
- vc_uniscr_insert(vc, nr);
- scr_memmovew(p + nr, p, (vc->vc_cols - vc->state.x - nr) * 2);
- scr_memsetw(p, vc->vc_video_erase_char, nr * 2);
- vc->vc_need_wrap = 0;
- if (con_should_update(vc))
- do_update_region(vc, (unsigned long) p,
- vc->vc_cols - vc->state.x);
- }
- static void delete_char(struct vc_data *vc, unsigned int nr)
- {
- unsigned short *p = (unsigned short *) vc->vc_pos;
- vc_uniscr_delete(vc, nr);
- scr_memmovew(p, p + nr, (vc->vc_cols - vc->state.x - nr) * 2);
- scr_memsetw(p + vc->vc_cols - vc->state.x - nr, vc->vc_video_erase_char,
- nr * 2);
- vc->vc_need_wrap = 0;
- if (con_should_update(vc))
- do_update_region(vc, (unsigned long) p,
- vc->vc_cols - vc->state.x);
- }
- static int softcursor_original = -1;
- static void add_softcursor(struct vc_data *vc)
- {
- int i = scr_readw((u16 *) vc->vc_pos);
- u32 type = vc->vc_cursor_type;
- if (!(type & CUR_SW))
- return;
- if (softcursor_original != -1)
- return;
- softcursor_original = i;
- i |= CUR_SET(type);
- i ^= CUR_CHANGE(type);
- if ((type & CUR_ALWAYS_BG) &&
- (softcursor_original & CUR_BG) == (i & CUR_BG))
- i ^= CUR_BG;
- if ((type & CUR_INVERT_FG_BG) && (i & CUR_FG) == ((i & CUR_BG) >> 4))
- i ^= CUR_FG;
- scr_writew(i, (u16 *)vc->vc_pos);
- if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, i, vc->state.y, vc->state.x);
- }
- static void hide_softcursor(struct vc_data *vc)
- {
- if (softcursor_original != -1) {
- scr_writew(softcursor_original, (u16 *)vc->vc_pos);
- if (con_should_update(vc))
- vc->vc_sw->con_putc(vc, softcursor_original,
- vc->state.y, vc->state.x);
- softcursor_original = -1;
- }
- }
- static void hide_cursor(struct vc_data *vc)
- {
- if (vc_is_sel(vc))
- clear_selection();
- vc->vc_sw->con_cursor(vc, CM_ERASE);
- hide_softcursor(vc);
- }
- static void set_cursor(struct vc_data *vc)
- {
- if (!con_is_fg(vc) || console_blanked || vc->vc_mode == KD_GRAPHICS)
- return;
- if (vc->vc_deccm) {
- if (vc_is_sel(vc))
- clear_selection();
- add_softcursor(vc);
- if (CUR_SIZE(vc->vc_cursor_type) != CUR_NONE)
- vc->vc_sw->con_cursor(vc, CM_DRAW);
- } else
- hide_cursor(vc);
- }
- static void set_origin(struct vc_data *vc)
- {
- WARN_CONSOLE_UNLOCKED();
- if (!con_is_visible(vc) ||
- !vc->vc_sw->con_set_origin ||
- !vc->vc_sw->con_set_origin(vc))
- vc->vc_origin = (unsigned long)vc->vc_screenbuf;
- vc->vc_visible_origin = vc->vc_origin;
- vc->vc_scr_end = vc->vc_origin + vc->vc_screenbuf_size;
- vc->vc_pos = vc->vc_origin + vc->vc_size_row * vc->state.y +
- 2 * vc->state.x;
- }
- static void save_screen(struct vc_data *vc)
- {
- WARN_CONSOLE_UNLOCKED();
- if (vc->vc_sw->con_save_screen)
- vc->vc_sw->con_save_screen(vc);
- }
- static void flush_scrollback(struct vc_data *vc)
- {
- WARN_CONSOLE_UNLOCKED();
- set_origin(vc);
- if (vc->vc_sw->con_flush_scrollback) {
- vc->vc_sw->con_flush_scrollback(vc);
- } else if (con_is_visible(vc)) {
- /*
- * When no con_flush_scrollback method is provided then the
- * legacy way for flushing the scrollback buffer is to use
- * a side effect of the con_switch method. We do it only on
- * the foreground console as background consoles have no
- * scrollback buffers in that case and we obviously don't
- * want to switch to them.
- */
- hide_cursor(vc);
- vc->vc_sw->con_switch(vc);
- set_cursor(vc);
- }
- }
- /*
- * Redrawing of screen
- */
- void clear_buffer_attributes(struct vc_data *vc)
- {
- unsigned short *p = (unsigned short *)vc->vc_origin;
- int count = vc->vc_screenbuf_size / 2;
- int mask = vc->vc_hi_font_mask | 0xff;
- for (; count > 0; count--, p++) {
- scr_writew((scr_readw(p)&mask) | (vc->vc_video_erase_char & ~mask), p);
- }
- }
- void redraw_screen(struct vc_data *vc, int is_switch)
- {
- int redraw = 0;
- WARN_CONSOLE_UNLOCKED();
- if (!vc) {
- /* strange ... */
- /* printk("redraw_screen: tty %d not allocated ??\n", new_console+1); */
- return;
- }
- if (is_switch) {
- struct vc_data *old_vc = vc_cons[fg_console].d;
- if (old_vc == vc)
- return;
- if (!con_is_visible(vc))
- redraw = 1;
- *vc->vc_display_fg = vc;
- fg_console = vc->vc_num;
- hide_cursor(old_vc);
- if (!con_is_visible(old_vc)) {
- save_screen(old_vc);
- set_origin(old_vc);
- }
- if (tty0dev)
- sysfs_notify(&tty0dev->kobj, NULL, "active");
- } else {
- hide_cursor(vc);
- redraw = 1;
- }
- if (redraw) {
- int update;
- int old_was_color = vc->vc_can_do_color;
- set_origin(vc);
- update = vc->vc_sw->con_switch(vc);
- set_palette(vc);
- /*
- * If console changed from mono<->color, the best we can do
- * is to clear the buffer attributes. As it currently stands,
- * rebuilding new attributes from the old buffer is not doable
- * without overly complex code.
- */
- if (old_was_color != vc->vc_can_do_color) {
- update_attr(vc);
- clear_buffer_attributes(vc);
- }
- if (update && vc->vc_mode != KD_GRAPHICS)
- do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
- }
- set_cursor(vc);
- if (is_switch) {
- vt_set_leds_compute_shiftstate();
- notify_update(vc);
- }
- }
- /*
- * Allocation, freeing and resizing of VTs.
- */
- int vc_cons_allocated(unsigned int i)
- {
- return (i < MAX_NR_CONSOLES && vc_cons[i].d);
- }
- static void visual_init(struct vc_data *vc, int num, int init)
- {
- /* ++Geert: vc->vc_sw->con_init determines console size */
- if (vc->vc_sw)
- module_put(vc->vc_sw->owner);
- vc->vc_sw = conswitchp;
- #ifndef VT_SINGLE_DRIVER
- if (con_driver_map[num])
- vc->vc_sw = con_driver_map[num];
- #endif
- __module_get(vc->vc_sw->owner);
- vc->vc_num = num;
- vc->vc_display_fg = &master_display_fg;
- if (vc->uni_pagedict_loc)
- con_free_unimap(vc);
- vc->uni_pagedict_loc = &vc->uni_pagedict;
- vc->uni_pagedict = NULL;
- vc->vc_hi_font_mask = 0;
- vc->vc_complement_mask = 0;
- vc->vc_can_do_color = 0;
- vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
- vc->vc_sw->con_init(vc, init);
- if (!vc->vc_complement_mask)
- vc->vc_complement_mask = vc->vc_can_do_color ? 0x7700 : 0x0800;
- vc->vc_s_complement_mask = vc->vc_complement_mask;
- vc->vc_size_row = vc->vc_cols << 1;
- vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
- }
- static void visual_deinit(struct vc_data *vc)
- {
- vc->vc_sw->con_deinit(vc);
- module_put(vc->vc_sw->owner);
- }
- static void vc_port_destruct(struct tty_port *port)
- {
- struct vc_data *vc = container_of(port, struct vc_data, port);
- kfree(vc);
- }
- static const struct tty_port_operations vc_port_ops = {
- .destruct = vc_port_destruct,
- };
- /*
- * Change # of rows and columns (0 means unchanged/the size of fg_console)
- * [this is to be used together with some user program
- * like resize that changes the hardware videomode]
- */
- #define VC_MAXCOL (32767)
- #define VC_MAXROW (32767)
- int vc_allocate(unsigned int currcons) /* return 0 on success */
- {
- struct vt_notifier_param param;
- struct vc_data *vc;
- int err;
- WARN_CONSOLE_UNLOCKED();
- if (currcons >= MAX_NR_CONSOLES)
- return -ENXIO;
- if (vc_cons[currcons].d)
- return 0;
- /* due to the granularity of kmalloc, we waste some memory here */
- /* the alloc is done in two steps, to optimize the common situation
- of a 25x80 console (structsize=216, screenbuf_size=4000) */
- /* although the numbers above are not valid since long ago, the
- point is still up-to-date and the comment still has its value
- even if only as a historical artifact. --mj, July 1998 */
- param.vc = vc = kzalloc(sizeof(struct vc_data), GFP_KERNEL);
- if (!vc)
- return -ENOMEM;
- vc_cons[currcons].d = vc;
- tty_port_init(&vc->port);
- vc->port.ops = &vc_port_ops;
- INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
- visual_init(vc, currcons, 1);
- if (!*vc->uni_pagedict_loc)
- con_set_default_unimap(vc);
- err = -EINVAL;
- if (vc->vc_cols > VC_MAXCOL || vc->vc_rows > VC_MAXROW ||
- vc->vc_screenbuf_size > KMALLOC_MAX_SIZE || !vc->vc_screenbuf_size)
- goto err_free;
- err = -ENOMEM;
- vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_KERNEL);
- if (!vc->vc_screenbuf)
- goto err_free;
- /* If no drivers have overridden us and the user didn't pass a
- boot option, default to displaying the cursor */
- if (global_cursor_default == -1)
- global_cursor_default = 1;
- vc_init(vc, vc->vc_rows, vc->vc_cols, 1);
- vcs_make_sysfs(currcons);
- atomic_notifier_call_chain(&vt_notifier_list, VT_ALLOCATE, ¶m);
- return 0;
- err_free:
- visual_deinit(vc);
- kfree(vc);
- vc_cons[currcons].d = NULL;
- return err;
- }
- static inline int resize_screen(struct vc_data *vc, int width, int height,
- int user)
- {
- /* Resizes the resolution of the display adapater */
- int err = 0;
- if (vc->vc_sw->con_resize)
- err = vc->vc_sw->con_resize(vc, width, height, user);
- return err;
- }
- /**
- * vc_do_resize - resizing method for the tty
- * @tty: tty being resized
- * @vc: virtual console private data
- * @cols: columns
- * @lines: lines
- *
- * Resize a virtual console, clipping according to the actual constraints.
- * If the caller passes a tty structure then update the termios winsize
- * information and perform any necessary signal handling.
- *
- * Caller must hold the console semaphore. Takes the termios rwsem and
- * ctrl.lock of the tty IFF a tty is passed.
- */
- static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
- unsigned int cols, unsigned int lines)
- {
- unsigned long old_origin, new_origin, new_scr_end, rlth, rrem, err = 0;
- unsigned long end;
- unsigned int old_rows, old_row_size, first_copied_row;
- unsigned int new_cols, new_rows, new_row_size, new_screen_size;
- unsigned int user;
- unsigned short *oldscreen, *newscreen;
- struct uni_screen *new_uniscr = NULL;
- WARN_CONSOLE_UNLOCKED();
- if (!vc)
- return -ENXIO;
- user = vc->vc_resize_user;
- vc->vc_resize_user = 0;
- if (cols > VC_MAXCOL || lines > VC_MAXROW)
- return -EINVAL;
- new_cols = (cols ? cols : vc->vc_cols);
- new_rows = (lines ? lines : vc->vc_rows);
- new_row_size = new_cols << 1;
- new_screen_size = new_row_size * new_rows;
- if (new_cols == vc->vc_cols && new_rows == vc->vc_rows) {
- /*
- * This function is being called here to cover the case
- * where the userspace calls the FBIOPUT_VSCREENINFO twice,
- * passing the same fb_var_screeninfo containing the fields
- * yres/xres equal to a number non-multiple of vc_font.height
- * and yres_virtual/xres_virtual equal to number lesser than the
- * vc_font.height and yres/xres.
- * In the second call, the struct fb_var_screeninfo isn't
- * being modified by the underlying driver because of the
- * if above, and this causes the fbcon_display->vrows to become
- * negative and it eventually leads to out-of-bound
- * access by the imageblit function.
- * To give the correct values to the struct and to not have
- * to deal with possible errors from the code below, we call
- * the resize_screen here as well.
- */
- return resize_screen(vc, new_cols, new_rows, user);
- }
- if (new_screen_size > KMALLOC_MAX_SIZE || !new_screen_size)
- return -EINVAL;
- newscreen = kzalloc(new_screen_size, GFP_USER);
- if (!newscreen)
- return -ENOMEM;
- if (get_vc_uniscr(vc)) {
- new_uniscr = vc_uniscr_alloc(new_cols, new_rows);
- if (!new_uniscr) {
- kfree(newscreen);
- return -ENOMEM;
- }
- }
- if (vc_is_sel(vc))
- clear_selection();
- old_rows = vc->vc_rows;
- old_row_size = vc->vc_size_row;
- err = resize_screen(vc, new_cols, new_rows, user);
- if (err) {
- kfree(newscreen);
- vc_uniscr_free(new_uniscr);
- return err;
- }
- vc->vc_rows = new_rows;
- vc->vc_cols = new_cols;
- vc->vc_size_row = new_row_size;
- vc->vc_screenbuf_size = new_screen_size;
- rlth = min(old_row_size, new_row_size);
- rrem = new_row_size - rlth;
- old_origin = vc->vc_origin;
- new_origin = (long) newscreen;
- new_scr_end = new_origin + new_screen_size;
- if (vc->state.y > new_rows) {
- if (old_rows - vc->state.y < new_rows) {
- /*
- * Cursor near the bottom, copy contents from the
- * bottom of buffer
- */
- first_copied_row = (old_rows - new_rows);
- } else {
- /*
- * Cursor is in no man's land, copy 1/2 screenful
- * from the top and bottom of cursor position
- */
- first_copied_row = (vc->state.y - new_rows/2);
- }
- old_origin += first_copied_row * old_row_size;
- } else
- first_copied_row = 0;
- end = old_origin + old_row_size * min(old_rows, new_rows);
- vc_uniscr_copy_area(new_uniscr, new_cols, new_rows,
- get_vc_uniscr(vc), rlth/2, first_copied_row,
- min(old_rows, new_rows));
- vc_uniscr_set(vc, new_uniscr);
- update_attr(vc);
- while (old_origin < end) {
- scr_memcpyw((unsigned short *) new_origin,
- (unsigned short *) old_origin, rlth);
- if (rrem)
- scr_memsetw((void *)(new_origin + rlth),
- vc->vc_video_erase_char, rrem);
- old_origin += old_row_size;
- new_origin += new_row_size;
- }
- if (new_scr_end > new_origin)
- scr_memsetw((void *)new_origin, vc->vc_video_erase_char,
- new_scr_end - new_origin);
- oldscreen = vc->vc_screenbuf;
- vc->vc_screenbuf = newscreen;
- vc->vc_screenbuf_size = new_screen_size;
- set_origin(vc);
- kfree(oldscreen);
- /* do part of a reset_terminal() */
- vc->vc_top = 0;
- vc->vc_bottom = vc->vc_rows;
- gotoxy(vc, vc->state.x, vc->state.y);
- save_cur(vc);
- if (tty) {
- /* Rewrite the requested winsize data with the actual
- resulting sizes */
- struct winsize ws;
- memset(&ws, 0, sizeof(ws));
- ws.ws_row = vc->vc_rows;
- ws.ws_col = vc->vc_cols;
- ws.ws_ypixel = vc->vc_scan_lines;
- tty_do_resize(tty, &ws);
- }
- if (con_is_visible(vc))
- update_screen(vc);
- vt_event_post(VT_EVENT_RESIZE, vc->vc_num, vc->vc_num);
- notify_update(vc);
- return err;
- }
- /**
- * vc_resize - resize a VT
- * @vc: virtual console
- * @cols: columns
- * @rows: rows
- *
- * Resize a virtual console as seen from the console end of things. We
- * use the common vc_do_resize methods to update the structures. The
- * caller must hold the console sem to protect console internals and
- * vc->port.tty
- */
- int vc_resize(struct vc_data *vc, unsigned int cols, unsigned int rows)
- {
- return vc_do_resize(vc->port.tty, vc, cols, rows);
- }
- /**
- * vt_resize - resize a VT
- * @tty: tty to resize
- * @ws: winsize attributes
- *
- * Resize a virtual terminal. This is called by the tty layer as we
- * register our own handler for resizing. The mutual helper does all
- * the actual work.
- *
- * Takes the console sem and the called methods then take the tty
- * termios_rwsem and the tty ctrl.lock in that order.
- */
- static int vt_resize(struct tty_struct *tty, struct winsize *ws)
- {
- struct vc_data *vc = tty->driver_data;
- int ret;
- console_lock();
- ret = vc_do_resize(tty, vc, ws->ws_col, ws->ws_row);
- console_unlock();
- return ret;
- }
- struct vc_data *vc_deallocate(unsigned int currcons)
- {
- struct vc_data *vc = NULL;
- WARN_CONSOLE_UNLOCKED();
- if (vc_cons_allocated(currcons)) {
- struct vt_notifier_param param;
- param.vc = vc = vc_cons[currcons].d;
- atomic_notifier_call_chain(&vt_notifier_list, VT_DEALLOCATE, ¶m);
- vcs_remove_sysfs(currcons);
- visual_deinit(vc);
- con_free_unimap(vc);
- put_pid(vc->vt_pid);
- vc_uniscr_set(vc, NULL);
- kfree(vc->vc_screenbuf);
- vc_cons[currcons].d = NULL;
- }
- return vc;
- }
- /*
- * VT102 emulator
- */
- enum { EPecma = 0, EPdec, EPeq, EPgt, EPlt};
- #define set_kbd(vc, x) vt_set_kbd_mode_bit((vc)->vc_num, (x))
- #define clr_kbd(vc, x) vt_clr_kbd_mode_bit((vc)->vc_num, (x))
- #define is_kbd(vc, x) vt_get_kbd_mode_bit((vc)->vc_num, (x))
- #define decarm VC_REPEAT
- #define decckm VC_CKMODE
- #define kbdapplic VC_APPLIC
- #define lnm VC_CRLF
- const unsigned char color_table[] = { 0, 4, 2, 6, 1, 5, 3, 7,
- 8,12,10,14, 9,13,11,15 };
- /* the default colour table, for VGA+ colour systems */
- unsigned char default_red[] = {
- 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa,
- 0x55, 0xff, 0x55, 0xff, 0x55, 0xff, 0x55, 0xff
- };
- module_param_array(default_red, byte, NULL, S_IRUGO | S_IWUSR);
- unsigned char default_grn[] = {
- 0x00, 0x00, 0xaa, 0x55, 0x00, 0x00, 0xaa, 0xaa,
- 0x55, 0x55, 0xff, 0xff, 0x55, 0x55, 0xff, 0xff
- };
- module_param_array(default_grn, byte, NULL, S_IRUGO | S_IWUSR);
- unsigned char default_blu[] = {
- 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa,
- 0x55, 0x55, 0x55, 0x55, 0xff, 0xff, 0xff, 0xff
- };
- module_param_array(default_blu, byte, NULL, S_IRUGO | S_IWUSR);
- /*
- * gotoxy() must verify all boundaries, because the arguments
- * might also be negative. If the given position is out of
- * bounds, the cursor is placed at the nearest margin.
- */
- static void gotoxy(struct vc_data *vc, int new_x, int new_y)
- {
- int min_y, max_y;
- if (new_x < 0)
- vc->state.x = 0;
- else {
- if (new_x >= vc->vc_cols)
- vc->state.x = vc->vc_cols - 1;
- else
- vc->state.x = new_x;
- }
- if (vc->vc_decom) {
- min_y = vc->vc_top;
- max_y = vc->vc_bottom;
- } else {
- min_y = 0;
- max_y = vc->vc_rows;
- }
- if (new_y < min_y)
- vc->state.y = min_y;
- else if (new_y >= max_y)
- vc->state.y = max_y - 1;
- else
- vc->state.y = new_y;
- vc->vc_pos = vc->vc_origin + vc->state.y * vc->vc_size_row +
- (vc->state.x << 1);
- vc->vc_need_wrap = 0;
- }
- /* for absolute user moves, when decom is set */
- static void gotoxay(struct vc_data *vc, int new_x, int new_y)
- {
- gotoxy(vc, new_x, vc->vc_decom ? (vc->vc_top + new_y) : new_y);
- }
- void scrollback(struct vc_data *vc)
- {
- scrolldelta(-(vc->vc_rows / 2));
- }
- void scrollfront(struct vc_data *vc, int lines)
- {
- if (!lines)
- lines = vc->vc_rows / 2;
- scrolldelta(lines);
- }
- static void lf(struct vc_data *vc)
- {
- /* don't scroll if above bottom of scrolling region, or
- * if below scrolling region
- */
- if (vc->state.y + 1 == vc->vc_bottom)
- con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_UP, 1);
- else if (vc->state.y < vc->vc_rows - 1) {
- vc->state.y++;
- vc->vc_pos += vc->vc_size_row;
- }
- vc->vc_need_wrap = 0;
- notify_write(vc, '\n');
- }
- static void ri(struct vc_data *vc)
- {
- /* don't scroll if below top of scrolling region, or
- * if above scrolling region
- */
- if (vc->state.y == vc->vc_top)
- con_scroll(vc, vc->vc_top, vc->vc_bottom, SM_DOWN, 1);
- else if (vc->state.y > 0) {
- vc->state.y--;
- vc->vc_pos -= vc->vc_size_row;
- }
- vc->vc_need_wrap = 0;
- }
- static inline void cr(struct vc_data *vc)
- {
- vc->vc_pos -= vc->state.x << 1;
- vc->vc_need_wrap = vc->state.x = 0;
- notify_write(vc, '\r');
- }
- static inline void bs(struct vc_data *vc)
- {
- if (vc->state.x) {
- vc->vc_pos -= 2;
- vc->state.x--;
- vc->vc_need_wrap = 0;
- notify_write(vc, '\b');
- }
- }
- static inline void del(struct vc_data *vc)
- {
- /* ignored */
- }
- static void csi_J(struct vc_data *vc, int vpar)
- {
- unsigned int count;
- unsigned short * start;
- switch (vpar) {
- case 0: /* erase from cursor to end of display */
- vc_uniscr_clear_line(vc, vc->state.x,
- vc->vc_cols - vc->state.x);
- vc_uniscr_clear_lines(vc, vc->state.y + 1,
- vc->vc_rows - vc->state.y - 1);
- count = (vc->vc_scr_end - vc->vc_pos) >> 1;
- start = (unsigned short *)vc->vc_pos;
- break;
- case 1: /* erase from start to cursor */
- vc_uniscr_clear_line(vc, 0, vc->state.x + 1);
- vc_uniscr_clear_lines(vc, 0, vc->state.y);
- count = ((vc->vc_pos - vc->vc_origin) >> 1) + 1;
- start = (unsigned short *)vc->vc_origin;
- break;
- case 3: /* include scrollback */
- flush_scrollback(vc);
- fallthrough;
- case 2: /* erase whole display */
- vc_uniscr_clear_lines(vc, 0, vc->vc_rows);
- count = vc->vc_cols * vc->vc_rows;
- start = (unsigned short *)vc->vc_origin;
- break;
- default:
- return;
- }
- scr_memsetw(start, vc->vc_video_erase_char, 2 * count);
- if (con_should_update(vc))
- do_update_region(vc, (unsigned long) start, count);
- vc->vc_need_wrap = 0;
- }
- static void csi_K(struct vc_data *vc, int vpar)
- {
- unsigned int count;
- unsigned short *start = (unsigned short *)vc->vc_pos;
- int offset;
- switch (vpar) {
- case 0: /* erase from cursor to end of line */
- offset = 0;
- count = vc->vc_cols - vc->state.x;
- break;
- case 1: /* erase from start of line to cursor */
- offset = -vc->state.x;
- count = vc->state.x + 1;
- break;
- case 2: /* erase whole line */
- offset = -vc->state.x;
- count = vc->vc_cols;
- break;
- default:
- return;
- }
- vc_uniscr_clear_line(vc, vc->state.x + offset, count);
- scr_memsetw(start + offset, vc->vc_video_erase_char, 2 * count);
- vc->vc_need_wrap = 0;
- if (con_should_update(vc))
- do_update_region(vc, (unsigned long)(start + offset), count);
- }
- /* erase the following vpar positions */
- static void csi_X(struct vc_data *vc, unsigned int vpar)
- { /* not vt100? */
- unsigned int count;
- if (!vpar)
- vpar++;
- count = min(vpar, vc->vc_cols - vc->state.x);
- vc_uniscr_clear_line(vc, vc->state.x, count);
- scr_memsetw((unsigned short *)vc->vc_pos, vc->vc_video_erase_char, 2 * count);
- if (con_should_update(vc))
- vc->vc_sw->con_clear(vc, vc->state.y, vc->state.x, 1, count);
- vc->vc_need_wrap = 0;
- }
- static void default_attr(struct vc_data *vc)
- {
- vc->state.intensity = VCI_NORMAL;
- vc->state.italic = false;
- vc->state.underline = false;
- vc->state.reverse = false;
- vc->state.blink = false;
- vc->state.color = vc->vc_def_color;
- }
- struct rgb { u8 r; u8 g; u8 b; };
- static void rgb_from_256(int i, struct rgb *c)
- {
- if (i < 8) { /* Standard colours. */
- c->r = i&1 ? 0xaa : 0x00;
- c->g = i&2 ? 0xaa : 0x00;
- c->b = i&4 ? 0xaa : 0x00;
- } else if (i < 16) {
- c->r = i&1 ? 0xff : 0x55;
- c->g = i&2 ? 0xff : 0x55;
- c->b = i&4 ? 0xff : 0x55;
- } else if (i < 232) { /* 6x6x6 colour cube. */
- c->r = (i - 16) / 36 * 85 / 2;
- c->g = (i - 16) / 6 % 6 * 85 / 2;
- c->b = (i - 16) % 6 * 85 / 2;
- } else /* Grayscale ramp. */
- c->r = c->g = c->b = i * 10 - 2312;
- }
- static void rgb_foreground(struct vc_data *vc, const struct rgb *c)
- {
- u8 hue = 0, max = max3(c->r, c->g, c->b);
- if (c->r > max / 2)
- hue |= 4;
- if (c->g > max / 2)
- hue |= 2;
- if (c->b > max / 2)
- hue |= 1;
- if (hue == 7 && max <= 0x55) {
- hue = 0;
- vc->state.intensity = VCI_BOLD;
- } else if (max > 0xaa)
- vc->state.intensity = VCI_BOLD;
- else
- vc->state.intensity = VCI_NORMAL;
- vc->state.color = (vc->state.color & 0xf0) | hue;
- }
- static void rgb_background(struct vc_data *vc, const struct rgb *c)
- {
- /* For backgrounds, err on the dark side. */
- vc->state.color = (vc->state.color & 0x0f)
- | (c->r&0x80) >> 1 | (c->g&0x80) >> 2 | (c->b&0x80) >> 3;
- }
- /*
- * ITU T.416 Higher colour modes. They break the usual properties of SGR codes
- * and thus need to be detected and ignored by hand. That standard also
- * wants : rather than ; as separators but sequences containing : are currently
- * completely ignored by the parser.
- *
- * Subcommands 3 (CMY) and 4 (CMYK) are so insane there's no point in
- * supporting them.
- */
- static int vc_t416_color(struct vc_data *vc, int i,
- void(*set_color)(struct vc_data *vc, const struct rgb *c))
- {
- struct rgb c;
- i++;
- if (i > vc->vc_npar)
- return i;
- if (vc->vc_par[i] == 5 && i + 1 <= vc->vc_npar) {
- /* 256 colours */
- i++;
- rgb_from_256(vc->vc_par[i], &c);
- } else if (vc->vc_par[i] == 2 && i + 3 <= vc->vc_npar) {
- /* 24 bit */
- c.r = vc->vc_par[i + 1];
- c.g = vc->vc_par[i + 2];
- c.b = vc->vc_par[i + 3];
- i += 3;
- } else
- return i;
- set_color(vc, &c);
- return i;
- }
- /* console_lock is held */
- static void csi_m(struct vc_data *vc)
- {
- int i;
- for (i = 0; i <= vc->vc_npar; i++)
- switch (vc->vc_par[i]) {
- case 0: /* all attributes off */
- default_attr(vc);
- break;
- case 1:
- vc->state.intensity = VCI_BOLD;
- break;
- case 2:
- vc->state.intensity = VCI_HALF_BRIGHT;
- break;
- case 3:
- vc->state.italic = true;
- break;
- case 21:
- /*
- * No console drivers support double underline, so
- * convert it to a single underline.
- */
- case 4:
- vc->state.underline = true;
- break;
- case 5:
- vc->state.blink = true;
- break;
- case 7:
- vc->state.reverse = true;
- break;
- case 10: /* ANSI X3.64-1979 (SCO-ish?)
- * Select primary font, don't display control chars if
- * defined, don't set bit 8 on output.
- */
- vc->vc_translate = set_translate(vc->state.Gx_charset[vc->state.charset], vc);
- vc->vc_disp_ctrl = 0;
- vc->vc_toggle_meta = 0;
- break;
- case 11: /* ANSI X3.64-1979 (SCO-ish?)
- * Select first alternate font, lets chars < 32 be
- * displayed as ROM chars.
- */
- vc->vc_translate = set_translate(IBMPC_MAP, vc);
- vc->vc_disp_ctrl = 1;
- vc->vc_toggle_meta = 0;
- break;
- case 12: /* ANSI X3.64-1979 (SCO-ish?)
- * Select second alternate font, toggle high bit
- * before displaying as ROM char.
- */
- vc->vc_translate = set_translate(IBMPC_MAP, vc);
- vc->vc_disp_ctrl = 1;
- vc->vc_toggle_meta = 1;
- break;
- case 22:
- vc->state.intensity = VCI_NORMAL;
- break;
- case 23:
- vc->state.italic = false;
- break;
- case 24:
- vc->state.underline = false;
- break;
- case 25:
- vc->state.blink = false;
- break;
- case 27:
- vc->state.reverse = false;
- break;
- case 38:
- i = vc_t416_color(vc, i, rgb_foreground);
- break;
- case 48:
- i = vc_t416_color(vc, i, rgb_background);
- break;
- case 39:
- vc->state.color = (vc->vc_def_color & 0x0f) |
- (vc->state.color & 0xf0);
- break;
- case 49:
- vc->state.color = (vc->vc_def_color & 0xf0) |
- (vc->state.color & 0x0f);
- break;
- default:
- if (vc->vc_par[i] >= 90 && vc->vc_par[i] <= 107) {
- if (vc->vc_par[i] < 100)
- vc->state.intensity = VCI_BOLD;
- vc->vc_par[i] -= 60;
- }
- if (vc->vc_par[i] >= 30 && vc->vc_par[i] <= 37)
- vc->state.color = color_table[vc->vc_par[i] - 30]
- | (vc->state.color & 0xf0);
- else if (vc->vc_par[i] >= 40 && vc->vc_par[i] <= 47)
- vc->state.color = (color_table[vc->vc_par[i] - 40] << 4)
- | (vc->state.color & 0x0f);
- break;
- }
- update_attr(vc);
- }
- static void respond_string(const char *p, size_t len, struct tty_port *port)
- {
- tty_insert_flip_string(port, p, len);
- tty_flip_buffer_push(port);
- }
- static void cursor_report(struct vc_data *vc, struct tty_struct *tty)
- {
- char buf[40];
- int len;
- len = sprintf(buf, "\033[%d;%dR", vc->state.y +
- (vc->vc_decom ? vc->vc_top + 1 : 1),
- vc->state.x + 1);
- respond_string(buf, len, tty->port);
- }
- static inline void status_report(struct tty_struct *tty)
- {
- static const char teminal_ok[] = "\033[0n";
- respond_string(teminal_ok, strlen(teminal_ok), tty->port);
- }
- static inline void respond_ID(struct tty_struct *tty)
- {
- /* terminal answer to an ESC-Z or csi0c query. */
- static const char vt102_id[] = "\033[?6c";
- respond_string(vt102_id, strlen(vt102_id), tty->port);
- }
- void mouse_report(struct tty_struct *tty, int butt, int mrx, int mry)
- {
- char buf[8];
- int len;
- len = sprintf(buf, "\033[M%c%c%c", (char)(' ' + butt),
- (char)('!' + mrx), (char)('!' + mry));
- respond_string(buf, len, tty->port);
- }
- /* invoked via ioctl(TIOCLINUX) and through set_selection_user */
- int mouse_reporting(void)
- {
- return vc_cons[fg_console].d->vc_report_mouse;
- }
- /* console_lock is held */
- static void set_mode(struct vc_data *vc, int on_off)
- {
- int i;
- for (i = 0; i <= vc->vc_npar; i++)
- if (vc->vc_priv == EPdec) {
- switch(vc->vc_par[i]) { /* DEC private modes set/reset */
- case 1: /* Cursor keys send ^[Ox/^[[x */
- if (on_off)
- set_kbd(vc, decckm);
- else
- clr_kbd(vc, decckm);
- break;
- case 3: /* 80/132 mode switch unimplemented */
- #if 0
- vc_resize(deccolm ? 132 : 80, vc->vc_rows);
- /* this alone does not suffice; some user mode
- utility has to change the hardware regs */
- #endif
- break;
- case 5: /* Inverted screen on/off */
- if (vc->vc_decscnm != on_off) {
- vc->vc_decscnm = on_off;
- invert_screen(vc, 0,
- vc->vc_screenbuf_size,
- false);
- update_attr(vc);
- }
- break;
- case 6: /* Origin relative/absolute */
- vc->vc_decom = on_off;
- gotoxay(vc, 0, 0);
- break;
- case 7: /* Autowrap on/off */
- vc->vc_decawm = on_off;
- break;
- case 8: /* Autorepeat on/off */
- if (on_off)
- set_kbd(vc, decarm);
- else
- clr_kbd(vc, decarm);
- break;
- case 9:
- vc->vc_report_mouse = on_off ? 1 : 0;
- break;
- case 25: /* Cursor on/off */
- vc->vc_deccm = on_off;
- break;
- case 1000:
- vc->vc_report_mouse = on_off ? 2 : 0;
- break;
- }
- } else {
- switch(vc->vc_par[i]) { /* ANSI modes set/reset */
- case 3: /* Monitor (display ctrls) */
- vc->vc_disp_ctrl = on_off;
- break;
- case 4: /* Insert Mode on/off */
- vc->vc_decim = on_off;
- break;
- case 20: /* Lf, Enter == CrLf/Lf */
- if (on_off)
- set_kbd(vc, lnm);
- else
- clr_kbd(vc, lnm);
- break;
- }
- }
- }
- /* console_lock is held */
- static void setterm_command(struct vc_data *vc)
- {
- switch (vc->vc_par[0]) {
- case 1: /* set color for underline mode */
- if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
- vc->vc_ulcolor = color_table[vc->vc_par[1]];
- if (vc->state.underline)
- update_attr(vc);
- }
- break;
- case 2: /* set color for half intensity mode */
- if (vc->vc_can_do_color && vc->vc_par[1] < 16) {
- vc->vc_halfcolor = color_table[vc->vc_par[1]];
- if (vc->state.intensity == VCI_HALF_BRIGHT)
- update_attr(vc);
- }
- break;
- case 8: /* store colors as defaults */
- vc->vc_def_color = vc->vc_attr;
- if (vc->vc_hi_font_mask == 0x100)
- vc->vc_def_color >>= 1;
- default_attr(vc);
- update_attr(vc);
- break;
- case 9: /* set blanking interval */
- blankinterval = min(vc->vc_par[1], 60U) * 60;
- poke_blanked_console();
- break;
- case 10: /* set bell frequency in Hz */
- if (vc->vc_npar >= 1)
- vc->vc_bell_pitch = vc->vc_par[1];
- else
- vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
- break;
- case 11: /* set bell duration in msec */
- if (vc->vc_npar >= 1)
- vc->vc_bell_duration = (vc->vc_par[1] < 2000) ?
- msecs_to_jiffies(vc->vc_par[1]) : 0;
- else
- vc->vc_bell_duration = DEFAULT_BELL_DURATION;
- break;
- case 12: /* bring specified console to the front */
- if (vc->vc_par[1] >= 1 && vc_cons_allocated(vc->vc_par[1] - 1))
- set_console(vc->vc_par[1] - 1);
- break;
- case 13: /* unblank the screen */
- poke_blanked_console();
- break;
- case 14: /* set vesa powerdown interval */
- vesa_off_interval = min(vc->vc_par[1], 60U) * 60 * HZ;
- break;
- case 15: /* activate the previous console */
- set_console(last_console);
- break;
- case 16: /* set cursor blink duration in msec */
- if (vc->vc_npar >= 1 && vc->vc_par[1] >= 50 &&
- vc->vc_par[1] <= USHRT_MAX)
- vc->vc_cur_blink_ms = vc->vc_par[1];
- else
- vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
- break;
- }
- }
- /* console_lock is held */
- static void csi_at(struct vc_data *vc, unsigned int nr)
- {
- if (nr > vc->vc_cols - vc->state.x)
- nr = vc->vc_cols - vc->state.x;
- else if (!nr)
- nr = 1;
- insert_char(vc, nr);
- }
- /* console_lock is held */
- static void csi_L(struct vc_data *vc, unsigned int nr)
- {
- if (nr > vc->vc_rows - vc->state.y)
- nr = vc->vc_rows - vc->state.y;
- else if (!nr)
- nr = 1;
- con_scroll(vc, vc->state.y, vc->vc_bottom, SM_DOWN, nr);
- vc->vc_need_wrap = 0;
- }
- /* console_lock is held */
- static void csi_P(struct vc_data *vc, unsigned int nr)
- {
- if (nr > vc->vc_cols - vc->state.x)
- nr = vc->vc_cols - vc->state.x;
- else if (!nr)
- nr = 1;
- delete_char(vc, nr);
- }
- /* console_lock is held */
- static void csi_M(struct vc_data *vc, unsigned int nr)
- {
- if (nr > vc->vc_rows - vc->state.y)
- nr = vc->vc_rows - vc->state.y;
- else if (!nr)
- nr=1;
- con_scroll(vc, vc->state.y, vc->vc_bottom, SM_UP, nr);
- vc->vc_need_wrap = 0;
- }
- /* console_lock is held (except via vc_init->reset_terminal */
- static void save_cur(struct vc_data *vc)
- {
- memcpy(&vc->saved_state, &vc->state, sizeof(vc->state));
- }
- /* console_lock is held */
- static void restore_cur(struct vc_data *vc)
- {
- memcpy(&vc->state, &vc->saved_state, sizeof(vc->state));
- gotoxy(vc, vc->state.x, vc->state.y);
- vc->vc_translate = set_translate(vc->state.Gx_charset[vc->state.charset],
- vc);
- update_attr(vc);
- vc->vc_need_wrap = 0;
- }
- enum { ESnormal, ESesc, ESsquare, ESgetpars, ESfunckey,
- EShash, ESsetG0, ESsetG1, ESpercent, EScsiignore, ESnonstd,
- ESpalette, ESosc, ESapc, ESpm, ESdcs };
- /* console_lock is held (except via vc_init()) */
- static void reset_terminal(struct vc_data *vc, int do_clear)
- {
- unsigned int i;
- vc->vc_top = 0;
- vc->vc_bottom = vc->vc_rows;
- vc->vc_state = ESnormal;
- vc->vc_priv = EPecma;
- vc->vc_translate = set_translate(LAT1_MAP, vc);
- vc->state.Gx_charset[0] = LAT1_MAP;
- vc->state.Gx_charset[1] = GRAF_MAP;
- vc->state.charset = 0;
- vc->vc_need_wrap = 0;
- vc->vc_report_mouse = 0;
- vc->vc_utf = default_utf8;
- vc->vc_utf_count = 0;
- vc->vc_disp_ctrl = 0;
- vc->vc_toggle_meta = 0;
- vc->vc_decscnm = 0;
- vc->vc_decom = 0;
- vc->vc_decawm = 1;
- vc->vc_deccm = global_cursor_default;
- vc->vc_decim = 0;
- vt_reset_keyboard(vc->vc_num);
- vc->vc_cursor_type = cur_default;
- vc->vc_complement_mask = vc->vc_s_complement_mask;
- default_attr(vc);
- update_attr(vc);
- bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
- for (i = 0; i < VC_TABSTOPS_COUNT; i += 8)
- set_bit(i, vc->vc_tab_stop);
- vc->vc_bell_pitch = DEFAULT_BELL_PITCH;
- vc->vc_bell_duration = DEFAULT_BELL_DURATION;
- vc->vc_cur_blink_ms = DEFAULT_CURSOR_BLINK_MS;
- gotoxy(vc, 0, 0);
- save_cur(vc);
- if (do_clear)
- csi_J(vc, 2);
- }
- static void vc_setGx(struct vc_data *vc, unsigned int which, int c)
- {
- unsigned char *charset = &vc->state.Gx_charset[which];
- switch (c) {
- case '0':
- *charset = GRAF_MAP;
- break;
- case 'B':
- *charset = LAT1_MAP;
- break;
- case 'U':
- *charset = IBMPC_MAP;
- break;
- case 'K':
- *charset = USER_MAP;
- break;
- }
- if (vc->state.charset == which)
- vc->vc_translate = set_translate(*charset, vc);
- }
- /* is this state an ANSI control string? */
- static bool ansi_control_string(unsigned int state)
- {
- if (state == ESosc || state == ESapc || state == ESpm || state == ESdcs)
- return true;
- return false;
- }
- /* console_lock is held */
- static void do_con_trol(struct tty_struct *tty, struct vc_data *vc, int c)
- {
- /*
- * Control characters can be used in the _middle_
- * of an escape sequence, aside from ANSI control strings.
- */
- if (ansi_control_string(vc->vc_state) && c >= 8 && c <= 13)
- return;
- switch (c) {
- case 0:
- return;
- case 7:
- if (ansi_control_string(vc->vc_state))
- vc->vc_state = ESnormal;
- else if (vc->vc_bell_duration)
- kd_mksound(vc->vc_bell_pitch, vc->vc_bell_duration);
- return;
- case 8:
- bs(vc);
- return;
- case 9:
- vc->vc_pos -= (vc->state.x << 1);
- vc->state.x = find_next_bit(vc->vc_tab_stop,
- min(vc->vc_cols - 1, VC_TABSTOPS_COUNT),
- vc->state.x + 1);
- if (vc->state.x >= VC_TABSTOPS_COUNT)
- vc->state.x = vc->vc_cols - 1;
- vc->vc_pos += (vc->state.x << 1);
- notify_write(vc, '\t');
- return;
- case 10: case 11: case 12:
- lf(vc);
- if (!is_kbd(vc, lnm))
- return;
- fallthrough;
- case 13:
- cr(vc);
- return;
- case 14:
- vc->state.charset = 1;
- vc->vc_translate = set_translate(vc->state.Gx_charset[1], vc);
- vc->vc_disp_ctrl = 1;
- return;
- case 15:
- vc->state.charset = 0;
- vc->vc_translate = set_translate(vc->state.Gx_charset[0], vc);
- vc->vc_disp_ctrl = 0;
- return;
- case 24: case 26:
- vc->vc_state = ESnormal;
- return;
- case 27:
- vc->vc_state = ESesc;
- return;
- case 127:
- del(vc);
- return;
- case 128+27:
- vc->vc_state = ESsquare;
- return;
- }
- switch(vc->vc_state) {
- case ESesc:
- vc->vc_state = ESnormal;
- switch (c) {
- case '[':
- vc->vc_state = ESsquare;
- return;
- case ']':
- vc->vc_state = ESnonstd;
- return;
- case '_':
- vc->vc_state = ESapc;
- return;
- case '^':
- vc->vc_state = ESpm;
- return;
- case '%':
- vc->vc_state = ESpercent;
- return;
- case 'E':
- cr(vc);
- lf(vc);
- return;
- case 'M':
- ri(vc);
- return;
- case 'D':
- lf(vc);
- return;
- case 'H':
- if (vc->state.x < VC_TABSTOPS_COUNT)
- set_bit(vc->state.x, vc->vc_tab_stop);
- return;
- case 'P':
- vc->vc_state = ESdcs;
- return;
- case 'Z':
- respond_ID(tty);
- return;
- case '7':
- save_cur(vc);
- return;
- case '8':
- restore_cur(vc);
- return;
- case '(':
- vc->vc_state = ESsetG0;
- return;
- case ')':
- vc->vc_state = ESsetG1;
- return;
- case '#':
- vc->vc_state = EShash;
- return;
- case 'c':
- reset_terminal(vc, 1);
- return;
- case '>': /* Numeric keypad */
- clr_kbd(vc, kbdapplic);
- return;
- case '=': /* Appl. keypad */
- set_kbd(vc, kbdapplic);
- return;
- }
- return;
- case ESnonstd:
- if (c=='P') { /* palette escape sequence */
- for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
- vc->vc_par[vc->vc_npar] = 0;
- vc->vc_npar = 0;
- vc->vc_state = ESpalette;
- return;
- } else if (c=='R') { /* reset palette */
- reset_palette(vc);
- vc->vc_state = ESnormal;
- } else if (c>='0' && c<='9')
- vc->vc_state = ESosc;
- else
- vc->vc_state = ESnormal;
- return;
- case ESpalette:
- if (isxdigit(c)) {
- vc->vc_par[vc->vc_npar++] = hex_to_bin(c);
- if (vc->vc_npar == 7) {
- int i = vc->vc_par[0] * 3, j = 1;
- vc->vc_palette[i] = 16 * vc->vc_par[j++];
- vc->vc_palette[i++] += vc->vc_par[j++];
- vc->vc_palette[i] = 16 * vc->vc_par[j++];
- vc->vc_palette[i++] += vc->vc_par[j++];
- vc->vc_palette[i] = 16 * vc->vc_par[j++];
- vc->vc_palette[i] += vc->vc_par[j];
- set_palette(vc);
- vc->vc_state = ESnormal;
- }
- } else
- vc->vc_state = ESnormal;
- return;
- case ESsquare:
- for (vc->vc_npar = 0; vc->vc_npar < NPAR; vc->vc_npar++)
- vc->vc_par[vc->vc_npar] = 0;
- vc->vc_npar = 0;
- vc->vc_state = ESgetpars;
- if (c == '[') { /* Function key */
- vc->vc_state=ESfunckey;
- return;
- }
- switch (c) {
- case '?':
- vc->vc_priv = EPdec;
- return;
- case '>':
- vc->vc_priv = EPgt;
- return;
- case '=':
- vc->vc_priv = EPeq;
- return;
- case '<':
- vc->vc_priv = EPlt;
- return;
- }
- vc->vc_priv = EPecma;
- fallthrough;
- case ESgetpars:
- if (c == ';' && vc->vc_npar < NPAR - 1) {
- vc->vc_npar++;
- return;
- } else if (c>='0' && c<='9') {
- vc->vc_par[vc->vc_npar] *= 10;
- vc->vc_par[vc->vc_npar] += c - '0';
- return;
- }
- if (c >= 0x20 && c <= 0x3f) { /* 0x2x, 0x3a and 0x3c - 0x3f */
- vc->vc_state = EScsiignore;
- return;
- }
- vc->vc_state = ESnormal;
- switch(c) {
- case 'h':
- if (vc->vc_priv <= EPdec)
- set_mode(vc, 1);
- return;
- case 'l':
- if (vc->vc_priv <= EPdec)
- set_mode(vc, 0);
- return;
- case 'c':
- if (vc->vc_priv == EPdec) {
- if (vc->vc_par[0])
- vc->vc_cursor_type =
- CUR_MAKE(vc->vc_par[0],
- vc->vc_par[1],
- vc->vc_par[2]);
- else
- vc->vc_cursor_type = cur_default;
- return;
- }
- break;
- case 'm':
- if (vc->vc_priv == EPdec) {
- clear_selection();
- if (vc->vc_par[0])
- vc->vc_complement_mask = vc->vc_par[0] << 8 | vc->vc_par[1];
- else
- vc->vc_complement_mask = vc->vc_s_complement_mask;
- return;
- }
- break;
- case 'n':
- if (vc->vc_priv == EPecma) {
- if (vc->vc_par[0] == 5)
- status_report(tty);
- else if (vc->vc_par[0] == 6)
- cursor_report(vc, tty);
- }
- return;
- }
- if (vc->vc_priv != EPecma) {
- vc->vc_priv = EPecma;
- return;
- }
- switch(c) {
- case 'G': case '`':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- gotoxy(vc, vc->vc_par[0], vc->state.y);
- return;
- case 'A':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x, vc->state.y - vc->vc_par[0]);
- return;
- case 'B': case 'e':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x, vc->state.y + vc->vc_par[0]);
- return;
- case 'C': case 'a':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x + vc->vc_par[0], vc->state.y);
- return;
- case 'D':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, vc->state.x - vc->vc_par[0], vc->state.y);
- return;
- case 'E':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, 0, vc->state.y + vc->vc_par[0]);
- return;
- case 'F':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- gotoxy(vc, 0, vc->state.y - vc->vc_par[0]);
- return;
- case 'd':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- gotoxay(vc, vc->state.x ,vc->vc_par[0]);
- return;
- case 'H': case 'f':
- if (vc->vc_par[0])
- vc->vc_par[0]--;
- if (vc->vc_par[1])
- vc->vc_par[1]--;
- gotoxay(vc, vc->vc_par[1], vc->vc_par[0]);
- return;
- case 'J':
- csi_J(vc, vc->vc_par[0]);
- return;
- case 'K':
- csi_K(vc, vc->vc_par[0]);
- return;
- case 'L':
- csi_L(vc, vc->vc_par[0]);
- return;
- case 'M':
- csi_M(vc, vc->vc_par[0]);
- return;
- case 'P':
- csi_P(vc, vc->vc_par[0]);
- return;
- case 'c':
- if (!vc->vc_par[0])
- respond_ID(tty);
- return;
- case 'g':
- if (!vc->vc_par[0] && vc->state.x < VC_TABSTOPS_COUNT)
- set_bit(vc->state.x, vc->vc_tab_stop);
- else if (vc->vc_par[0] == 3)
- bitmap_zero(vc->vc_tab_stop, VC_TABSTOPS_COUNT);
- return;
- case 'm':
- csi_m(vc);
- return;
- case 'q': /* DECLL - but only 3 leds */
- /* map 0,1,2,3 to 0,1,2,4 */
- if (vc->vc_par[0] < 4)
- vt_set_led_state(vc->vc_num,
- (vc->vc_par[0] < 3) ? vc->vc_par[0] : 4);
- return;
- case 'r':
- if (!vc->vc_par[0])
- vc->vc_par[0]++;
- if (!vc->vc_par[1])
- vc->vc_par[1] = vc->vc_rows;
- /* Minimum allowed region is 2 lines */
- if (vc->vc_par[0] < vc->vc_par[1] &&
- vc->vc_par[1] <= vc->vc_rows) {
- vc->vc_top = vc->vc_par[0] - 1;
- vc->vc_bottom = vc->vc_par[1];
- gotoxay(vc, 0, 0);
- }
- return;
- case 's':
- save_cur(vc);
- return;
- case 'u':
- restore_cur(vc);
- return;
- case 'X':
- csi_X(vc, vc->vc_par[0]);
- return;
- case '@':
- csi_at(vc, vc->vc_par[0]);
- return;
- case ']': /* setterm functions */
- setterm_command(vc);
- return;
- }
- return;
- case EScsiignore:
- if (c >= 20 && c <= 0x3f)
- return;
- vc->vc_state = ESnormal;
- return;
- case ESpercent:
- vc->vc_state = ESnormal;
- switch (c) {
- case '@': /* defined in ISO 2022 */
- vc->vc_utf = 0;
- return;
- case 'G': /* prelim official escape code */
- case '8': /* retained for compatibility */
- vc->vc_utf = 1;
- return;
- }
- return;
- case ESfunckey:
- vc->vc_state = ESnormal;
- return;
- case EShash:
- vc->vc_state = ESnormal;
- if (c == '8') {
- /* DEC screen alignment test. kludge :-) */
- vc->vc_video_erase_char =
- (vc->vc_video_erase_char & 0xff00) | 'E';
- csi_J(vc, 2);
- vc->vc_video_erase_char =
- (vc->vc_video_erase_char & 0xff00) | ' ';
- do_update_region(vc, vc->vc_origin, vc->vc_screenbuf_size / 2);
- }
- return;
- case ESsetG0:
- vc_setGx(vc, 0, c);
- vc->vc_state = ESnormal;
- return;
- case ESsetG1:
- vc_setGx(vc, 1, c);
- vc->vc_state = ESnormal;
- return;
- case ESapc:
- return;
- case ESosc:
- return;
- case ESpm:
- return;
- case ESdcs:
- return;
- default:
- vc->vc_state = ESnormal;
- }
- }
- /* is_double_width() is based on the wcwidth() implementation by
- * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
- * Latest version: https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
- */
- struct interval {
- uint32_t first;
- uint32_t last;
- };
- static int ucs_cmp(const void *key, const void *elt)
- {
- uint32_t ucs = *(uint32_t *)key;
- struct interval e = *(struct interval *) elt;
- if (ucs > e.last)
- return 1;
- else if (ucs < e.first)
- return -1;
- return 0;
- }
- static int is_double_width(uint32_t ucs)
- {
- static const struct interval double_width[] = {
- { 0x1100, 0x115F }, { 0x2329, 0x232A }, { 0x2E80, 0x303E },
- { 0x3040, 0xA4CF }, { 0xAC00, 0xD7A3 }, { 0xF900, 0xFAFF },
- { 0xFE10, 0xFE19 }, { 0xFE30, 0xFE6F }, { 0xFF00, 0xFF60 },
- { 0xFFE0, 0xFFE6 }, { 0x20000, 0x2FFFD }, { 0x30000, 0x3FFFD }
- };
- if (ucs < double_width[0].first ||
- ucs > double_width[ARRAY_SIZE(double_width) - 1].last)
- return 0;
- return bsearch(&ucs, double_width, ARRAY_SIZE(double_width),
- sizeof(struct interval), ucs_cmp) != NULL;
- }
- struct vc_draw_region {
- unsigned long from, to;
- int x;
- };
- static void con_flush(struct vc_data *vc, struct vc_draw_region *draw)
- {
- if (draw->x < 0)
- return;
- vc->vc_sw->con_putcs(vc, (u16 *)draw->from,
- (u16 *)draw->to - (u16 *)draw->from, vc->state.y,
- draw->x);
- draw->x = -1;
- }
- static inline int vc_translate_ascii(const struct vc_data *vc, int c)
- {
- if (IS_ENABLED(CONFIG_CONSOLE_TRANSLATIONS)) {
- if (vc->vc_toggle_meta)
- c |= 0x80;
- return vc->vc_translate[c];
- }
- return c;
- }
- /**
- * vc_sanitize_unicode -- Replace invalid Unicode code points with U+FFFD
- * @c: the received character, or U+FFFD for invalid sequences.
- */
- static inline int vc_sanitize_unicode(const int c)
- {
- if ((c >= 0xd800 && c <= 0xdfff) || c == 0xfffe || c == 0xffff)
- return 0xfffd;
- return c;
- }
- /**
- * vc_translate_unicode -- Combine UTF-8 into Unicode in @vc_utf_char
- * @vc: virtual console
- * @c: character to translate
- * @rescan: we return true if we need more (continuation) data
- *
- * @vc_utf_char is the being-constructed unicode character.
- * @vc_utf_count is the number of continuation bytes still expected to arrive.
- * @vc_npar is the number of continuation bytes arrived so far.
- */
- static int vc_translate_unicode(struct vc_data *vc, int c, bool *rescan)
- {
- static const u32 utf8_length_changes[] = {
- 0x0000007f, 0x000007ff, 0x0000ffff,
- 0x001fffff, 0x03ffffff, 0x7fffffff
- };
- /* Continuation byte received */
- if ((c & 0xc0) == 0x80) {
- /* Unexpected continuation byte? */
- if (!vc->vc_utf_count)
- return 0xfffd;
- vc->vc_utf_char = (vc->vc_utf_char << 6) | (c & 0x3f);
- vc->vc_npar++;
- if (--vc->vc_utf_count)
- goto need_more_bytes;
- /* Got a whole character */
- c = vc->vc_utf_char;
- /* Reject overlong sequences */
- if (c <= utf8_length_changes[vc->vc_npar - 1] ||
- c > utf8_length_changes[vc->vc_npar])
- return 0xfffd;
- return vc_sanitize_unicode(c);
- }
- /* Single ASCII byte or first byte of a sequence received */
- if (vc->vc_utf_count) {
- /* Continuation byte expected */
- *rescan = true;
- vc->vc_utf_count = 0;
- return 0xfffd;
- }
- /* Nothing to do if an ASCII byte was received */
- if (c <= 0x7f)
- return c;
- /* First byte of a multibyte sequence received */
- vc->vc_npar = 0;
- if ((c & 0xe0) == 0xc0) {
- vc->vc_utf_count = 1;
- vc->vc_utf_char = (c & 0x1f);
- } else if ((c & 0xf0) == 0xe0) {
- vc->vc_utf_count = 2;
- vc->vc_utf_char = (c & 0x0f);
- } else if ((c & 0xf8) == 0xf0) {
- vc->vc_utf_count = 3;
- vc->vc_utf_char = (c & 0x07);
- } else if ((c & 0xfc) == 0xf8) {
- vc->vc_utf_count = 4;
- vc->vc_utf_char = (c & 0x03);
- } else if ((c & 0xfe) == 0xfc) {
- vc->vc_utf_count = 5;
- vc->vc_utf_char = (c & 0x01);
- } else {
- /* 254 and 255 are invalid */
- return 0xfffd;
- }
- need_more_bytes:
- return -1;
- }
- static int vc_translate(struct vc_data *vc, int *c, bool *rescan)
- {
- /* Do no translation at all in control states */
- if (vc->vc_state != ESnormal)
- return *c;
- if (vc->vc_utf && !vc->vc_disp_ctrl)
- return *c = vc_translate_unicode(vc, *c, rescan);
- /* no utf or alternate charset mode */
- return vc_translate_ascii(vc, *c);
- }
- static inline unsigned char vc_invert_attr(const struct vc_data *vc)
- {
- if (!vc->vc_can_do_color)
- return vc->vc_attr ^ 0x08;
- if (vc->vc_hi_font_mask == 0x100)
- return (vc->vc_attr & 0x11) |
- ((vc->vc_attr & 0xe0) >> 4) |
- ((vc->vc_attr & 0x0e) << 4);
- return (vc->vc_attr & 0x88) |
- ((vc->vc_attr & 0x70) >> 4) |
- ((vc->vc_attr & 0x07) << 4);
- }
- static bool vc_is_control(struct vc_data *vc, int tc, int c)
- {
- /*
- * A bitmap for codes <32. A bit of 1 indicates that the code
- * corresponding to that bit number invokes some special action (such
- * as cursor movement) and should not be displayed as a glyph unless
- * the disp_ctrl mode is explicitly enabled.
- */
- static const u32 CTRL_ACTION = 0x0d00ff81;
- /* Cannot be overridden by disp_ctrl */
- static const u32 CTRL_ALWAYS = 0x0800f501;
- if (vc->vc_state != ESnormal)
- return true;
- if (!tc)
- return true;
- /*
- * If the original code was a control character we only allow a glyph
- * to be displayed if the code is not normally used (such as for cursor
- * movement) or if the disp_ctrl mode has been explicitly enabled.
- * Certain characters (as given by the CTRL_ALWAYS bitmap) are always
- * displayed as control characters, as the console would be pretty
- * useless without them; to display an arbitrary font position use the
- * direct-to-font zone in UTF-8 mode.
- */
- if (c < 32) {
- if (vc->vc_disp_ctrl)
- return CTRL_ALWAYS & BIT(c);
- else
- return vc->vc_utf || (CTRL_ACTION & BIT(c));
- }
- if (c == 127 && !vc->vc_disp_ctrl)
- return true;
- if (c == 128 + 27)
- return true;
- return false;
- }
- static int vc_con_write_normal(struct vc_data *vc, int tc, int c,
- struct vc_draw_region *draw)
- {
- int next_c;
- unsigned char vc_attr = vc->vc_attr;
- u16 himask = vc->vc_hi_font_mask, charmask = himask ? 0x1ff : 0xff;
- u8 width = 1;
- bool inverse = false;
- if (vc->vc_utf && !vc->vc_disp_ctrl) {
- if (is_double_width(c))
- width = 2;
- }
- /* Now try to find out how to display it */
- tc = conv_uni_to_pc(vc, tc);
- if (tc & ~charmask) {
- if (tc == -1 || tc == -2)
- return -1; /* nothing to display */
- /* Glyph not found */
- if ((!vc->vc_utf || vc->vc_disp_ctrl || c < 128) &&
- !(c & ~charmask)) {
- /*
- * In legacy mode use the glyph we get by a 1:1
- * mapping.
- * This would make absolutely no sense with Unicode in
- * mind, but do this for ASCII characters since a font
- * may lack Unicode mapping info and we don't want to
- * end up with having question marks only.
- */
- tc = c;
- } else {
- /*
- * Display U+FFFD. If it's not found, display an inverse
- * question mark.
- */
- tc = conv_uni_to_pc(vc, 0xfffd);
- if (tc < 0) {
- inverse = true;
- tc = conv_uni_to_pc(vc, '?');
- if (tc < 0)
- tc = '?';
- vc_attr = vc_invert_attr(vc);
- con_flush(vc, draw);
- }
- }
- }
- next_c = c;
- while (1) {
- if (vc->vc_need_wrap || vc->vc_decim)
- con_flush(vc, draw);
- if (vc->vc_need_wrap) {
- cr(vc);
- lf(vc);
- }
- if (vc->vc_decim)
- insert_char(vc, 1);
- vc_uniscr_putc(vc, next_c);
- if (himask)
- tc = ((tc & 0x100) ? himask : 0) |
- (tc & 0xff);
- tc |= (vc_attr << 8) & ~himask;
- scr_writew(tc, (u16 *)vc->vc_pos);
- if (con_should_update(vc) && draw->x < 0) {
- draw->x = vc->state.x;
- draw->from = vc->vc_pos;
- }
- if (vc->state.x == vc->vc_cols - 1) {
- vc->vc_need_wrap = vc->vc_decawm;
- draw->to = vc->vc_pos + 2;
- } else {
- vc->state.x++;
- draw->to = (vc->vc_pos += 2);
- }
- if (!--width)
- break;
- /* A space is printed in the second column */
- tc = conv_uni_to_pc(vc, ' ');
- if (tc < 0)
- tc = ' ';
- next_c = ' ';
- }
- notify_write(vc, c);
- if (inverse)
- con_flush(vc, draw);
- return 0;
- }
- /* acquires console_lock */
- static int do_con_write(struct tty_struct *tty, const unsigned char *buf, int count)
- {
- struct vc_draw_region draw = {
- .x = -1,
- };
- int c, tc, n = 0;
- unsigned int currcons;
- struct vc_data *vc;
- struct vt_notifier_param param;
- bool rescan;
- if (in_interrupt())
- return count;
- console_lock();
- vc = tty->driver_data;
- if (vc == NULL) {
- pr_err("vt: argh, driver_data is NULL !\n");
- console_unlock();
- return 0;
- }
- currcons = vc->vc_num;
- if (!vc_cons_allocated(currcons)) {
- /* could this happen? */
- pr_warn_once("con_write: tty %d not allocated\n", currcons+1);
- console_unlock();
- return 0;
- }
- /* undraw cursor first */
- if (con_is_fg(vc))
- hide_cursor(vc);
- param.vc = vc;
- while (!tty->flow.stopped && count) {
- int orig = *buf;
- buf++;
- n++;
- count--;
- rescan_last_byte:
- c = orig;
- rescan = false;
- tc = vc_translate(vc, &c, &rescan);
- if (tc == -1)
- continue;
- param.c = tc;
- if (atomic_notifier_call_chain(&vt_notifier_list, VT_PREWRITE,
- ¶m) == NOTIFY_STOP)
- continue;
- if (vc_is_control(vc, tc, c)) {
- con_flush(vc, &draw);
- do_con_trol(tty, vc, orig);
- continue;
- }
- if (vc_con_write_normal(vc, tc, c, &draw) < 0)
- continue;
- if (rescan)
- goto rescan_last_byte;
- }
- con_flush(vc, &draw);
- vc_uniscr_debug_check(vc);
- console_conditional_schedule();
- notify_update(vc);
- console_unlock();
- return n;
- }
- /*
- * This is the console switching callback.
- *
- * Doing console switching in a process context allows
- * us to do the switches asynchronously (needed when we want
- * to switch due to a keyboard interrupt). Synchronization
- * with other console code and prevention of re-entrancy is
- * ensured with console_lock.
- */
- static void console_callback(struct work_struct *ignored)
- {
- console_lock();
- if (want_console >= 0) {
- if (want_console != fg_console &&
- vc_cons_allocated(want_console)) {
- hide_cursor(vc_cons[fg_console].d);
- change_console(vc_cons[want_console].d);
- /* we only changed when the console had already
- been allocated - a new console is not created
- in an interrupt routine */
- }
- want_console = -1;
- }
- if (do_poke_blanked_console) { /* do not unblank for a LED change */
- do_poke_blanked_console = 0;
- poke_blanked_console();
- }
- if (scrollback_delta) {
- struct vc_data *vc = vc_cons[fg_console].d;
- clear_selection();
- if (vc->vc_mode == KD_TEXT && vc->vc_sw->con_scrolldelta)
- vc->vc_sw->con_scrolldelta(vc, scrollback_delta);
- scrollback_delta = 0;
- }
- if (blank_timer_expired) {
- do_blank_screen(0);
- blank_timer_expired = 0;
- }
- notify_update(vc_cons[fg_console].d);
- console_unlock();
- }
- int set_console(int nr)
- {
- struct vc_data *vc = vc_cons[fg_console].d;
- if (!vc_cons_allocated(nr) || vt_dont_switch ||
- (vc->vt_mode.mode == VT_AUTO && vc->vc_mode == KD_GRAPHICS)) {
- /*
- * Console switch will fail in console_callback() or
- * change_console() so there is no point scheduling
- * the callback
- *
- * Existing set_console() users don't check the return
- * value so this shouldn't break anything
- */
- return -EINVAL;
- }
- want_console = nr;
- schedule_console_callback();
- return 0;
- }
- struct tty_driver *console_driver;
- #ifdef CONFIG_VT_CONSOLE
- /**
- * vt_kmsg_redirect() - Sets/gets the kernel message console
- * @new: The new virtual terminal number or -1 if the console should stay
- * unchanged
- *
- * By default, the kernel messages are always printed on the current virtual
- * console. However, the user may modify that default with the
- * TIOCL_SETKMSGREDIRECT ioctl call.
- *
- * This function sets the kernel message console to be @new. It returns the old
- * virtual console number. The virtual terminal number 0 (both as parameter and
- * return value) means no redirection (i.e. always printed on the currently
- * active console).
- *
- * The parameter -1 means that only the current console is returned, but the
- * value is not modified. You may use the macro vt_get_kmsg_redirect() in that
- * case to make the code more understandable.
- *
- * When the kernel is compiled without CONFIG_VT_CONSOLE, this function ignores
- * the parameter and always returns 0.
- */
- int vt_kmsg_redirect(int new)
- {
- static int kmsg_con;
- if (new != -1)
- return xchg(&kmsg_con, new);
- else
- return kmsg_con;
- }
- /*
- * Console on virtual terminal
- *
- * The console must be locked when we get here.
- */
- static void vt_console_print(struct console *co, const char *b, unsigned count)
- {
- struct vc_data *vc = vc_cons[fg_console].d;
- unsigned char c;
- static DEFINE_SPINLOCK(printing_lock);
- const ushort *start;
- ushort start_x, cnt;
- int kmsg_console;
- WARN_CONSOLE_UNLOCKED();
- /* this protects against concurrent oops only */
- if (!spin_trylock(&printing_lock))
- return;
- kmsg_console = vt_get_kmsg_redirect();
- if (kmsg_console && vc_cons_allocated(kmsg_console - 1))
- vc = vc_cons[kmsg_console - 1].d;
- if (!vc_cons_allocated(fg_console)) {
- /* impossible */
- /* printk("vt_console_print: tty %d not allocated ??\n", currcons+1); */
- goto quit;
- }
- if (vc->vc_mode != KD_TEXT)
- goto quit;
- /* undraw cursor first */
- if (con_is_fg(vc))
- hide_cursor(vc);
- start = (ushort *)vc->vc_pos;
- start_x = vc->state.x;
- cnt = 0;
- while (count--) {
- c = *b++;
- if (c == 10 || c == 13 || c == 8 || vc->vc_need_wrap) {
- if (cnt && con_is_visible(vc))
- vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x);
- cnt = 0;
- if (c == 8) { /* backspace */
- bs(vc);
- start = (ushort *)vc->vc_pos;
- start_x = vc->state.x;
- continue;
- }
- if (c != 13)
- lf(vc);
- cr(vc);
- start = (ushort *)vc->vc_pos;
- start_x = vc->state.x;
- if (c == 10 || c == 13)
- continue;
- }
- vc_uniscr_putc(vc, c);
- scr_writew((vc->vc_attr << 8) + c, (unsigned short *)vc->vc_pos);
- notify_write(vc, c);
- cnt++;
- if (vc->state.x == vc->vc_cols - 1) {
- vc->vc_need_wrap = 1;
- } else {
- vc->vc_pos += 2;
- vc->state.x++;
- }
- }
- if (cnt && con_is_visible(vc))
- vc->vc_sw->con_putcs(vc, start, cnt, vc->state.y, start_x);
- set_cursor(vc);
- notify_update(vc);
- quit:
- spin_unlock(&printing_lock);
- }
- static struct tty_driver *vt_console_device(struct console *c, int *index)
- {
- *index = c->index ? c->index-1 : fg_console;
- return console_driver;
- }
- static struct console vt_console_driver = {
- .name = "tty",
- .write = vt_console_print,
- .device = vt_console_device,
- .unblank = unblank_screen,
- .flags = CON_PRINTBUFFER,
- .index = -1,
- };
- #endif
- /*
- * Handling of Linux-specific VC ioctls
- */
- /*
- * Generally a bit racy with respect to console_lock();.
- *
- * There are some functions which don't need it.
- *
- * There are some functions which can sleep for arbitrary periods
- * (paste_selection) but we don't need the lock there anyway.
- *
- * set_selection_user has locking, and definitely needs it
- */
- int tioclinux(struct tty_struct *tty, unsigned long arg)
- {
- char type, data;
- char __user *p = (char __user *)arg;
- int lines;
- int ret;
- if (current->signal->tty != tty && !capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (get_user(type, p))
- return -EFAULT;
- ret = 0;
- switch (type)
- {
- case TIOCL_SETSEL:
- ret = set_selection_user((struct tiocl_selection
- __user *)(p+1), tty);
- break;
- case TIOCL_PASTESEL:
- ret = paste_selection(tty);
- break;
- case TIOCL_UNBLANKSCREEN:
- console_lock();
- unblank_screen();
- console_unlock();
- break;
- case TIOCL_SELLOADLUT:
- console_lock();
- ret = sel_loadlut(p);
- console_unlock();
- break;
- case TIOCL_GETSHIFTSTATE:
- /*
- * Make it possible to react to Shift+Mousebutton.
- * Note that 'shift_state' is an undocumented
- * kernel-internal variable; programs not closely
- * related to the kernel should not use this.
- */
- data = vt_get_shift_state();
- ret = put_user(data, p);
- break;
- case TIOCL_GETMOUSEREPORTING:
- console_lock(); /* May be overkill */
- data = mouse_reporting();
- console_unlock();
- ret = put_user(data, p);
- break;
- case TIOCL_SETVESABLANK:
- console_lock();
- ret = set_vesa_blanking(p);
- console_unlock();
- break;
- case TIOCL_GETKMSGREDIRECT:
- data = vt_get_kmsg_redirect();
- ret = put_user(data, p);
- break;
- case TIOCL_SETKMSGREDIRECT:
- if (!capable(CAP_SYS_ADMIN)) {
- ret = -EPERM;
- } else {
- if (get_user(data, p+1))
- ret = -EFAULT;
- else
- vt_kmsg_redirect(data);
- }
- break;
- case TIOCL_GETFGCONSOLE:
- /* No locking needed as this is a transiently
- correct return anyway if the caller hasn't
- disabled switching */
- ret = fg_console;
- break;
- case TIOCL_SCROLLCONSOLE:
- if (get_user(lines, (s32 __user *)(p+4))) {
- ret = -EFAULT;
- } else {
- /* Need the console lock here. Note that lots
- of other calls need fixing before the lock
- is actually useful ! */
- console_lock();
- scrollfront(vc_cons[fg_console].d, lines);
- console_unlock();
- ret = 0;
- }
- break;
- case TIOCL_BLANKSCREEN: /* until explicitly unblanked, not only poked */
- console_lock();
- ignore_poke = 1;
- do_blank_screen(0);
- console_unlock();
- break;
- case TIOCL_BLANKEDSCREEN:
- ret = console_blanked;
- break;
- default:
- ret = -EINVAL;
- break;
- }
- return ret;
- }
- /*
- * /dev/ttyN handling
- */
- static int con_write(struct tty_struct *tty, const unsigned char *buf, int count)
- {
- int retval;
- retval = do_con_write(tty, buf, count);
- con_flush_chars(tty);
- return retval;
- }
- static int con_put_char(struct tty_struct *tty, unsigned char ch)
- {
- return do_con_write(tty, &ch, 1);
- }
- static unsigned int con_write_room(struct tty_struct *tty)
- {
- if (tty->flow.stopped)
- return 0;
- return 32768; /* No limit, really; we're not buffering */
- }
- /*
- * con_throttle and con_unthrottle are only used for
- * paste_selection(), which has to stuff in a large number of
- * characters...
- */
- static void con_throttle(struct tty_struct *tty)
- {
- }
- static void con_unthrottle(struct tty_struct *tty)
- {
- struct vc_data *vc = tty->driver_data;
- wake_up_interruptible(&vc->paste_wait);
- }
- /*
- * Turn the Scroll-Lock LED on when the tty is stopped
- */
- static void con_stop(struct tty_struct *tty)
- {
- int console_num;
- if (!tty)
- return;
- console_num = tty->index;
- if (!vc_cons_allocated(console_num))
- return;
- vt_kbd_con_stop(console_num);
- }
- /*
- * Turn the Scroll-Lock LED off when the console is started
- */
- static void con_start(struct tty_struct *tty)
- {
- int console_num;
- if (!tty)
- return;
- console_num = tty->index;
- if (!vc_cons_allocated(console_num))
- return;
- vt_kbd_con_start(console_num);
- }
- static void con_flush_chars(struct tty_struct *tty)
- {
- struct vc_data *vc;
- if (in_interrupt()) /* from flush_to_ldisc */
- return;
- /* if we race with con_close(), vt may be null */
- console_lock();
- vc = tty->driver_data;
- if (vc)
- set_cursor(vc);
- console_unlock();
- }
- /*
- * Allocate the console screen memory.
- */
- static int con_install(struct tty_driver *driver, struct tty_struct *tty)
- {
- unsigned int currcons = tty->index;
- struct vc_data *vc;
- int ret;
- console_lock();
- ret = vc_allocate(currcons);
- if (ret)
- goto unlock;
- vc = vc_cons[currcons].d;
- /* Still being freed */
- if (vc->port.tty) {
- ret = -ERESTARTSYS;
- goto unlock;
- }
- ret = tty_port_install(&vc->port, driver, tty);
- if (ret)
- goto unlock;
- tty->driver_data = vc;
- vc->port.tty = tty;
- tty_port_get(&vc->port);
- if (!tty->winsize.ws_row && !tty->winsize.ws_col) {
- tty->winsize.ws_row = vc_cons[currcons].d->vc_rows;
- tty->winsize.ws_col = vc_cons[currcons].d->vc_cols;
- }
- if (vc->vc_utf)
- tty->termios.c_iflag |= IUTF8;
- else
- tty->termios.c_iflag &= ~IUTF8;
- unlock:
- console_unlock();
- return ret;
- }
- static int con_open(struct tty_struct *tty, struct file *filp)
- {
- /* everything done in install */
- return 0;
- }
- static void con_close(struct tty_struct *tty, struct file *filp)
- {
- /* Nothing to do - we defer to shutdown */
- }
- static void con_shutdown(struct tty_struct *tty)
- {
- struct vc_data *vc = tty->driver_data;
- BUG_ON(vc == NULL);
- console_lock();
- vc->port.tty = NULL;
- console_unlock();
- }
- static void con_cleanup(struct tty_struct *tty)
- {
- struct vc_data *vc = tty->driver_data;
- tty_port_put(&vc->port);
- }
- static int default_color = 7; /* white */
- static int default_italic_color = 2; // green (ASCII)
- static int default_underline_color = 3; // cyan (ASCII)
- module_param_named(color, default_color, int, S_IRUGO | S_IWUSR);
- module_param_named(italic, default_italic_color, int, S_IRUGO | S_IWUSR);
- module_param_named(underline, default_underline_color, int, S_IRUGO | S_IWUSR);
- static void vc_init(struct vc_data *vc, unsigned int rows,
- unsigned int cols, int do_clear)
- {
- int j, k ;
- vc->vc_cols = cols;
- vc->vc_rows = rows;
- vc->vc_size_row = cols << 1;
- vc->vc_screenbuf_size = vc->vc_rows * vc->vc_size_row;
- set_origin(vc);
- vc->vc_pos = vc->vc_origin;
- reset_vc(vc);
- for (j=k=0; j<16; j++) {
- vc->vc_palette[k++] = default_red[j] ;
- vc->vc_palette[k++] = default_grn[j] ;
- vc->vc_palette[k++] = default_blu[j] ;
- }
- vc->vc_def_color = default_color;
- vc->vc_ulcolor = default_underline_color;
- vc->vc_itcolor = default_italic_color;
- vc->vc_halfcolor = 0x08; /* grey */
- init_waitqueue_head(&vc->paste_wait);
- reset_terminal(vc, do_clear);
- }
- /*
- * This routine initializes console interrupts, and does nothing
- * else. If you want the screen to clear, call tty_write with
- * the appropriate escape-sequence.
- */
- static int __init con_init(void)
- {
- const char *display_desc = NULL;
- struct vc_data *vc;
- unsigned int currcons = 0, i;
- console_lock();
- if (!conswitchp)
- conswitchp = &dummy_con;
- display_desc = conswitchp->con_startup();
- if (!display_desc) {
- fg_console = 0;
- console_unlock();
- return 0;
- }
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- struct con_driver *con_driver = ®istered_con_driver[i];
- if (con_driver->con == NULL) {
- con_driver->con = conswitchp;
- con_driver->desc = display_desc;
- con_driver->flag = CON_DRIVER_FLAG_INIT;
- con_driver->first = 0;
- con_driver->last = MAX_NR_CONSOLES - 1;
- break;
- }
- }
- for (i = 0; i < MAX_NR_CONSOLES; i++)
- con_driver_map[i] = conswitchp;
- if (blankinterval) {
- blank_state = blank_normal_wait;
- mod_timer(&console_timer, jiffies + (blankinterval * HZ));
- }
- for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
- vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
- INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
- tty_port_init(&vc->port);
- visual_init(vc, currcons, 1);
- /* Assuming vc->vc_{cols,rows,screenbuf_size} are sane here. */
- vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
- vc_init(vc, vc->vc_rows, vc->vc_cols,
- currcons || !vc->vc_sw->con_save_screen);
- }
- currcons = fg_console = 0;
- master_display_fg = vc = vc_cons[currcons].d;
- set_origin(vc);
- save_screen(vc);
- gotoxy(vc, vc->state.x, vc->state.y);
- csi_J(vc, 0);
- update_screen(vc);
- pr_info("Console: %s %s %dx%d\n",
- vc->vc_can_do_color ? "colour" : "mono",
- display_desc, vc->vc_cols, vc->vc_rows);
- console_unlock();
- #ifdef CONFIG_VT_CONSOLE
- register_console(&vt_console_driver);
- #endif
- return 0;
- }
- console_initcall(con_init);
- static const struct tty_operations con_ops = {
- .install = con_install,
- .open = con_open,
- .close = con_close,
- .write = con_write,
- .write_room = con_write_room,
- .put_char = con_put_char,
- .flush_chars = con_flush_chars,
- .ioctl = vt_ioctl,
- #ifdef CONFIG_COMPAT
- .compat_ioctl = vt_compat_ioctl,
- #endif
- .stop = con_stop,
- .start = con_start,
- .throttle = con_throttle,
- .unthrottle = con_unthrottle,
- .resize = vt_resize,
- .shutdown = con_shutdown,
- .cleanup = con_cleanup,
- };
- static struct cdev vc0_cdev;
- static ssize_t show_tty_active(struct device *dev,
- struct device_attribute *attr, char *buf)
- {
- return sprintf(buf, "tty%d\n", fg_console + 1);
- }
- static DEVICE_ATTR(active, S_IRUGO, show_tty_active, NULL);
- static struct attribute *vt_dev_attrs[] = {
- &dev_attr_active.attr,
- NULL
- };
- ATTRIBUTE_GROUPS(vt_dev);
- int __init vty_init(const struct file_operations *console_fops)
- {
- cdev_init(&vc0_cdev, console_fops);
- if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
- register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
- panic("Couldn't register /dev/tty0 driver\n");
- tty0dev = device_create_with_groups(tty_class, NULL,
- MKDEV(TTY_MAJOR, 0), NULL,
- vt_dev_groups, "tty0");
- if (IS_ERR(tty0dev))
- tty0dev = NULL;
- vcs_init();
- console_driver = tty_alloc_driver(MAX_NR_CONSOLES, TTY_DRIVER_REAL_RAW |
- TTY_DRIVER_RESET_TERMIOS);
- if (IS_ERR(console_driver))
- panic("Couldn't allocate console driver\n");
- console_driver->name = "tty";
- console_driver->name_base = 1;
- console_driver->major = TTY_MAJOR;
- console_driver->minor_start = 1;
- console_driver->type = TTY_DRIVER_TYPE_CONSOLE;
- console_driver->init_termios = tty_std_termios;
- if (default_utf8)
- console_driver->init_termios.c_iflag |= IUTF8;
- tty_set_operations(console_driver, &con_ops);
- if (tty_register_driver(console_driver))
- panic("Couldn't register console driver\n");
- kbd_init();
- console_map_init();
- #ifdef CONFIG_MDA_CONSOLE
- mda_console_init();
- #endif
- return 0;
- }
- #ifndef VT_SINGLE_DRIVER
- static struct class *vtconsole_class;
- static int do_bind_con_driver(const struct consw *csw, int first, int last,
- int deflt)
- {
- struct module *owner = csw->owner;
- const char *desc = NULL;
- struct con_driver *con_driver;
- int i, j = -1, k = -1, retval = -ENODEV;
- if (!try_module_get(owner))
- return -ENODEV;
- WARN_CONSOLE_UNLOCKED();
- /* check if driver is registered */
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- con_driver = ®istered_con_driver[i];
- if (con_driver->con == csw) {
- desc = con_driver->desc;
- retval = 0;
- break;
- }
- }
- if (retval)
- goto err;
- if (!(con_driver->flag & CON_DRIVER_FLAG_INIT)) {
- csw->con_startup();
- con_driver->flag |= CON_DRIVER_FLAG_INIT;
- }
- if (deflt) {
- if (conswitchp)
- module_put(conswitchp->owner);
- __module_get(owner);
- conswitchp = csw;
- }
- first = max(first, con_driver->first);
- last = min(last, con_driver->last);
- for (i = first; i <= last; i++) {
- int old_was_color;
- struct vc_data *vc = vc_cons[i].d;
- if (con_driver_map[i])
- module_put(con_driver_map[i]->owner);
- __module_get(owner);
- con_driver_map[i] = csw;
- if (!vc || !vc->vc_sw)
- continue;
- j = i;
- if (con_is_visible(vc)) {
- k = i;
- save_screen(vc);
- }
- old_was_color = vc->vc_can_do_color;
- vc->vc_sw->con_deinit(vc);
- vc->vc_origin = (unsigned long)vc->vc_screenbuf;
- visual_init(vc, i, 0);
- set_origin(vc);
- update_attr(vc);
- /* If the console changed between mono <-> color, then
- * the attributes in the screenbuf will be wrong. The
- * following resets all attributes to something sane.
- */
- if (old_was_color != vc->vc_can_do_color)
- clear_buffer_attributes(vc);
- }
- pr_info("Console: switching ");
- if (!deflt)
- pr_cont("consoles %d-%d ", first + 1, last + 1);
- if (j >= 0) {
- struct vc_data *vc = vc_cons[j].d;
- pr_cont("to %s %s %dx%d\n",
- vc->vc_can_do_color ? "colour" : "mono",
- desc, vc->vc_cols, vc->vc_rows);
- if (k >= 0) {
- vc = vc_cons[k].d;
- update_screen(vc);
- }
- } else {
- pr_cont("to %s\n", desc);
- }
- retval = 0;
- err:
- module_put(owner);
- return retval;
- };
- #ifdef CONFIG_VT_HW_CONSOLE_BINDING
- int do_unbind_con_driver(const struct consw *csw, int first, int last, int deflt)
- {
- struct module *owner = csw->owner;
- const struct consw *defcsw = NULL;
- struct con_driver *con_driver = NULL, *con_back = NULL;
- int i, retval = -ENODEV;
- if (!try_module_get(owner))
- return -ENODEV;
- WARN_CONSOLE_UNLOCKED();
- /* check if driver is registered and if it is unbindable */
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- con_driver = ®istered_con_driver[i];
- if (con_driver->con == csw &&
- con_driver->flag & CON_DRIVER_FLAG_MODULE) {
- retval = 0;
- break;
- }
- }
- if (retval)
- goto err;
- retval = -ENODEV;
- /* check if backup driver exists */
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- con_back = ®istered_con_driver[i];
- if (con_back->con && con_back->con != csw) {
- defcsw = con_back->con;
- retval = 0;
- break;
- }
- }
- if (retval)
- goto err;
- if (!con_is_bound(csw))
- goto err;
- first = max(first, con_driver->first);
- last = min(last, con_driver->last);
- for (i = first; i <= last; i++) {
- if (con_driver_map[i] == csw) {
- module_put(csw->owner);
- con_driver_map[i] = NULL;
- }
- }
- if (!con_is_bound(defcsw)) {
- const struct consw *defconsw = conswitchp;
- defcsw->con_startup();
- con_back->flag |= CON_DRIVER_FLAG_INIT;
- /*
- * vgacon may change the default driver to point
- * to dummycon, we restore it here...
- */
- conswitchp = defconsw;
- }
- if (!con_is_bound(csw))
- con_driver->flag &= ~CON_DRIVER_FLAG_INIT;
- /* ignore return value, binding should not fail */
- do_bind_con_driver(defcsw, first, last, deflt);
- err:
- module_put(owner);
- return retval;
- }
- EXPORT_SYMBOL_GPL(do_unbind_con_driver);
- static int vt_bind(struct con_driver *con)
- {
- const struct consw *defcsw = NULL, *csw = NULL;
- int i, more = 1, first = -1, last = -1, deflt = 0;
- if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
- goto err;
- csw = con->con;
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- struct con_driver *con = ®istered_con_driver[i];
- if (con->con && !(con->flag & CON_DRIVER_FLAG_MODULE)) {
- defcsw = con->con;
- break;
- }
- }
- if (!defcsw)
- goto err;
- while (more) {
- more = 0;
- for (i = con->first; i <= con->last; i++) {
- if (con_driver_map[i] == defcsw) {
- if (first == -1)
- first = i;
- last = i;
- more = 1;
- } else if (first != -1)
- break;
- }
- if (first == 0 && last == MAX_NR_CONSOLES -1)
- deflt = 1;
- if (first != -1)
- do_bind_con_driver(csw, first, last, deflt);
- first = -1;
- last = -1;
- deflt = 0;
- }
- err:
- return 0;
- }
- static int vt_unbind(struct con_driver *con)
- {
- const struct consw *csw = NULL;
- int i, more = 1, first = -1, last = -1, deflt = 0;
- int ret;
- if (!con->con || !(con->flag & CON_DRIVER_FLAG_MODULE))
- goto err;
- csw = con->con;
- while (more) {
- more = 0;
- for (i = con->first; i <= con->last; i++) {
- if (con_driver_map[i] == csw) {
- if (first == -1)
- first = i;
- last = i;
- more = 1;
- } else if (first != -1)
- break;
- }
- if (first == 0 && last == MAX_NR_CONSOLES -1)
- deflt = 1;
- if (first != -1) {
- ret = do_unbind_con_driver(csw, first, last, deflt);
- if (ret != 0)
- return ret;
- }
- first = -1;
- last = -1;
- deflt = 0;
- }
- err:
- return 0;
- }
- #else
- static inline int vt_bind(struct con_driver *con)
- {
- return 0;
- }
- static inline int vt_unbind(struct con_driver *con)
- {
- return 0;
- }
- #endif /* CONFIG_VT_HW_CONSOLE_BINDING */
- static ssize_t store_bind(struct device *dev, struct device_attribute *attr,
- const char *buf, size_t count)
- {
- struct con_driver *con = dev_get_drvdata(dev);
- int bind = simple_strtoul(buf, NULL, 0);
- console_lock();
- if (bind)
- vt_bind(con);
- else
- vt_unbind(con);
- console_unlock();
- return count;
- }
- static ssize_t show_bind(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct con_driver *con = dev_get_drvdata(dev);
- int bind;
- console_lock();
- bind = con_is_bound(con->con);
- console_unlock();
- return sysfs_emit(buf, "%i\n", bind);
- }
- static ssize_t show_name(struct device *dev, struct device_attribute *attr,
- char *buf)
- {
- struct con_driver *con = dev_get_drvdata(dev);
- return sysfs_emit(buf, "%s %s\n",
- (con->flag & CON_DRIVER_FLAG_MODULE) ? "(M)" : "(S)",
- con->desc);
- }
- static DEVICE_ATTR(bind, S_IRUGO|S_IWUSR, show_bind, store_bind);
- static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
- static struct attribute *con_dev_attrs[] = {
- &dev_attr_bind.attr,
- &dev_attr_name.attr,
- NULL
- };
- ATTRIBUTE_GROUPS(con_dev);
- static int vtconsole_init_device(struct con_driver *con)
- {
- con->flag |= CON_DRIVER_FLAG_ATTR;
- return 0;
- }
- static void vtconsole_deinit_device(struct con_driver *con)
- {
- con->flag &= ~CON_DRIVER_FLAG_ATTR;
- }
- /**
- * con_is_bound - checks if driver is bound to the console
- * @csw: console driver
- *
- * RETURNS: zero if unbound, nonzero if bound
- *
- * Drivers can call this and if zero, they should release
- * all resources allocated on con_startup()
- */
- int con_is_bound(const struct consw *csw)
- {
- int i, bound = 0;
- WARN_CONSOLE_UNLOCKED();
- for (i = 0; i < MAX_NR_CONSOLES; i++) {
- if (con_driver_map[i] == csw) {
- bound = 1;
- break;
- }
- }
- return bound;
- }
- EXPORT_SYMBOL(con_is_bound);
- /**
- * con_is_visible - checks whether the current console is visible
- * @vc: virtual console
- *
- * RETURNS: zero if not visible, nonzero if visible
- */
- bool con_is_visible(const struct vc_data *vc)
- {
- WARN_CONSOLE_UNLOCKED();
- return *vc->vc_display_fg == vc;
- }
- EXPORT_SYMBOL(con_is_visible);
- /**
- * con_debug_enter - prepare the console for the kernel debugger
- * @vc: virtual console
- *
- * Called when the console is taken over by the kernel debugger, this
- * function needs to save the current console state, then put the console
- * into a state suitable for the kernel debugger.
- *
- * RETURNS:
- * Zero on success, nonzero if a failure occurred when trying to prepare
- * the console for the debugger.
- */
- int con_debug_enter(struct vc_data *vc)
- {
- int ret = 0;
- saved_fg_console = fg_console;
- saved_last_console = last_console;
- saved_want_console = want_console;
- saved_vc_mode = vc->vc_mode;
- saved_console_blanked = console_blanked;
- vc->vc_mode = KD_TEXT;
- console_blanked = 0;
- if (vc->vc_sw->con_debug_enter)
- ret = vc->vc_sw->con_debug_enter(vc);
- #ifdef CONFIG_KGDB_KDB
- /* Set the initial LINES variable if it is not already set */
- if (vc->vc_rows < 999) {
- int linecount;
- char lns[4];
- const char *setargs[3] = {
- "set",
- "LINES",
- lns,
- };
- if (kdbgetintenv(setargs[0], &linecount)) {
- snprintf(lns, 4, "%i", vc->vc_rows);
- kdb_set(2, setargs);
- }
- }
- if (vc->vc_cols < 999) {
- int colcount;
- char cols[4];
- const char *setargs[3] = {
- "set",
- "COLUMNS",
- cols,
- };
- if (kdbgetintenv(setargs[0], &colcount)) {
- snprintf(cols, 4, "%i", vc->vc_cols);
- kdb_set(2, setargs);
- }
- }
- #endif /* CONFIG_KGDB_KDB */
- return ret;
- }
- EXPORT_SYMBOL_GPL(con_debug_enter);
- /**
- * con_debug_leave - restore console state
- *
- * Restore the console state to what it was before the kernel debugger
- * was invoked.
- *
- * RETURNS:
- * Zero on success, nonzero if a failure occurred when trying to restore
- * the console.
- */
- int con_debug_leave(void)
- {
- struct vc_data *vc;
- int ret = 0;
- fg_console = saved_fg_console;
- last_console = saved_last_console;
- want_console = saved_want_console;
- console_blanked = saved_console_blanked;
- vc_cons[fg_console].d->vc_mode = saved_vc_mode;
- vc = vc_cons[fg_console].d;
- if (vc->vc_sw->con_debug_leave)
- ret = vc->vc_sw->con_debug_leave(vc);
- return ret;
- }
- EXPORT_SYMBOL_GPL(con_debug_leave);
- static int do_register_con_driver(const struct consw *csw, int first, int last)
- {
- struct module *owner = csw->owner;
- struct con_driver *con_driver;
- const char *desc;
- int i, retval;
- WARN_CONSOLE_UNLOCKED();
- if (!try_module_get(owner))
- return -ENODEV;
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- con_driver = ®istered_con_driver[i];
- /* already registered */
- if (con_driver->con == csw) {
- retval = -EBUSY;
- goto err;
- }
- }
- desc = csw->con_startup();
- if (!desc) {
- retval = -ENODEV;
- goto err;
- }
- retval = -EINVAL;
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- con_driver = ®istered_con_driver[i];
- if (con_driver->con == NULL &&
- !(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE)) {
- con_driver->con = csw;
- con_driver->desc = desc;
- con_driver->node = i;
- con_driver->flag = CON_DRIVER_FLAG_MODULE |
- CON_DRIVER_FLAG_INIT;
- con_driver->first = first;
- con_driver->last = last;
- retval = 0;
- break;
- }
- }
- if (retval)
- goto err;
- con_driver->dev =
- device_create_with_groups(vtconsole_class, NULL,
- MKDEV(0, con_driver->node),
- con_driver, con_dev_groups,
- "vtcon%i", con_driver->node);
- if (IS_ERR(con_driver->dev)) {
- pr_warn("Unable to create device for %s; errno = %ld\n",
- con_driver->desc, PTR_ERR(con_driver->dev));
- con_driver->dev = NULL;
- } else {
- vtconsole_init_device(con_driver);
- }
- err:
- module_put(owner);
- return retval;
- }
- /**
- * do_unregister_con_driver - unregister console driver from console layer
- * @csw: console driver
- *
- * DESCRIPTION: All drivers that registers to the console layer must
- * call this function upon exit, or if the console driver is in a state
- * where it won't be able to handle console services, such as the
- * framebuffer console without loaded framebuffer drivers.
- *
- * The driver must unbind first prior to unregistration.
- */
- int do_unregister_con_driver(const struct consw *csw)
- {
- int i;
- /* cannot unregister a bound driver */
- if (con_is_bound(csw))
- return -EBUSY;
- if (csw == conswitchp)
- return -EINVAL;
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- struct con_driver *con_driver = ®istered_con_driver[i];
- if (con_driver->con == csw) {
- /*
- * Defer the removal of the sysfs entries since that
- * will acquire the kernfs s_active lock and we can't
- * acquire this lock while holding the console lock:
- * the unbind sysfs entry imposes already the opposite
- * order. Reset con already here to prevent any later
- * lookup to succeed and mark this slot as zombie, so
- * it won't get reused until we complete the removal
- * in the deferred work.
- */
- con_driver->con = NULL;
- con_driver->flag = CON_DRIVER_FLAG_ZOMBIE;
- schedule_work(&con_driver_unregister_work);
- return 0;
- }
- }
- return -ENODEV;
- }
- EXPORT_SYMBOL_GPL(do_unregister_con_driver);
- static void con_driver_unregister_callback(struct work_struct *ignored)
- {
- int i;
- console_lock();
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- struct con_driver *con_driver = ®istered_con_driver[i];
- if (!(con_driver->flag & CON_DRIVER_FLAG_ZOMBIE))
- continue;
- console_unlock();
- vtconsole_deinit_device(con_driver);
- device_destroy(vtconsole_class, MKDEV(0, con_driver->node));
- console_lock();
- if (WARN_ON_ONCE(con_driver->con))
- con_driver->con = NULL;
- con_driver->desc = NULL;
- con_driver->dev = NULL;
- con_driver->node = 0;
- WARN_ON_ONCE(con_driver->flag != CON_DRIVER_FLAG_ZOMBIE);
- con_driver->flag = 0;
- con_driver->first = 0;
- con_driver->last = 0;
- }
- console_unlock();
- }
- /*
- * If we support more console drivers, this function is used
- * when a driver wants to take over some existing consoles
- * and become default driver for newly opened ones.
- *
- * do_take_over_console is basically a register followed by bind
- */
- int do_take_over_console(const struct consw *csw, int first, int last, int deflt)
- {
- int err;
- err = do_register_con_driver(csw, first, last);
- /*
- * If we get an busy error we still want to bind the console driver
- * and return success, as we may have unbound the console driver
- * but not unregistered it.
- */
- if (err == -EBUSY)
- err = 0;
- if (!err)
- do_bind_con_driver(csw, first, last, deflt);
- return err;
- }
- EXPORT_SYMBOL_GPL(do_take_over_console);
- /*
- * give_up_console is a wrapper to unregister_con_driver. It will only
- * work if driver is fully unbound.
- */
- void give_up_console(const struct consw *csw)
- {
- console_lock();
- do_unregister_con_driver(csw);
- console_unlock();
- }
- static int __init vtconsole_class_init(void)
- {
- int i;
- vtconsole_class = class_create(THIS_MODULE, "vtconsole");
- if (IS_ERR(vtconsole_class)) {
- pr_warn("Unable to create vt console class; errno = %ld\n",
- PTR_ERR(vtconsole_class));
- vtconsole_class = NULL;
- }
- /* Add system drivers to sysfs */
- for (i = 0; i < MAX_NR_CON_DRIVER; i++) {
- struct con_driver *con = ®istered_con_driver[i];
- if (con->con && !con->dev) {
- con->dev =
- device_create_with_groups(vtconsole_class, NULL,
- MKDEV(0, con->node),
- con, con_dev_groups,
- "vtcon%i", con->node);
- if (IS_ERR(con->dev)) {
- pr_warn("Unable to create device for %s; errno = %ld\n",
- con->desc, PTR_ERR(con->dev));
- con->dev = NULL;
- } else {
- vtconsole_init_device(con);
- }
- }
- }
- return 0;
- }
- postcore_initcall(vtconsole_class_init);
- #endif
- /*
- * Screen blanking
- */
- static int set_vesa_blanking(char __user *p)
- {
- unsigned int mode;
- if (get_user(mode, p + 1))
- return -EFAULT;
- vesa_blank_mode = (mode < 4) ? mode : 0;
- return 0;
- }
- void do_blank_screen(int entering_gfx)
- {
- struct vc_data *vc = vc_cons[fg_console].d;
- int i;
- might_sleep();
- WARN_CONSOLE_UNLOCKED();
- if (console_blanked) {
- if (blank_state == blank_vesa_wait) {
- blank_state = blank_off;
- vc->vc_sw->con_blank(vc, vesa_blank_mode + 1, 0);
- }
- return;
- }
- /* entering graphics mode? */
- if (entering_gfx) {
- hide_cursor(vc);
- save_screen(vc);
- vc->vc_sw->con_blank(vc, -1, 1);
- console_blanked = fg_console + 1;
- blank_state = blank_off;
- set_origin(vc);
- return;
- }
- blank_state = blank_off;
- /* don't blank graphics */
- if (vc->vc_mode != KD_TEXT) {
- console_blanked = fg_console + 1;
- return;
- }
- hide_cursor(vc);
- del_timer_sync(&console_timer);
- blank_timer_expired = 0;
- save_screen(vc);
- /* In case we need to reset origin, blanking hook returns 1 */
- i = vc->vc_sw->con_blank(vc, vesa_off_interval ? 1 : (vesa_blank_mode + 1), 0);
- console_blanked = fg_console + 1;
- if (i)
- set_origin(vc);
- if (console_blank_hook && console_blank_hook(1))
- return;
- if (vesa_off_interval && vesa_blank_mode) {
- blank_state = blank_vesa_wait;
- mod_timer(&console_timer, jiffies + vesa_off_interval);
- }
- vt_event_post(VT_EVENT_BLANK, vc->vc_num, vc->vc_num);
- }
- EXPORT_SYMBOL(do_blank_screen);
- /*
- * Called by timer as well as from vt_console_driver
- */
- void do_unblank_screen(int leaving_gfx)
- {
- struct vc_data *vc;
- /* This should now always be called from a "sane" (read: can schedule)
- * context for the sake of the low level drivers, except in the special
- * case of oops_in_progress
- */
- if (!oops_in_progress)
- might_sleep();
- WARN_CONSOLE_UNLOCKED();
- ignore_poke = 0;
- if (!console_blanked)
- return;
- if (!vc_cons_allocated(fg_console)) {
- /* impossible */
- pr_warn("unblank_screen: tty %d not allocated ??\n",
- fg_console + 1);
- return;
- }
- vc = vc_cons[fg_console].d;
- if (vc->vc_mode != KD_TEXT)
- return; /* but leave console_blanked != 0 */
- if (blankinterval) {
- mod_timer(&console_timer, jiffies + (blankinterval * HZ));
- blank_state = blank_normal_wait;
- }
- console_blanked = 0;
- if (vc->vc_sw->con_blank(vc, 0, leaving_gfx))
- /* Low-level driver cannot restore -> do it ourselves */
- update_screen(vc);
- if (console_blank_hook)
- console_blank_hook(0);
- set_palette(vc);
- set_cursor(vc);
- vt_event_post(VT_EVENT_UNBLANK, vc->vc_num, vc->vc_num);
- }
- EXPORT_SYMBOL(do_unblank_screen);
- /*
- * This is called by the outside world to cause a forced unblank, mostly for
- * oopses. Currently, I just call do_unblank_screen(0), but we could eventually
- * call it with 1 as an argument and so force a mode restore... that may kill
- * X or at least garbage the screen but would also make the Oops visible...
- */
- static void unblank_screen(void)
- {
- do_unblank_screen(0);
- }
- /*
- * We defer the timer blanking to work queue so it can take the console mutex
- * (console operations can still happen at irq time, but only from printk which
- * has the console mutex. Not perfect yet, but better than no locking
- */
- static void blank_screen_t(struct timer_list *unused)
- {
- blank_timer_expired = 1;
- schedule_work(&console_work);
- }
- void poke_blanked_console(void)
- {
- WARN_CONSOLE_UNLOCKED();
- /* Add this so we quickly catch whoever might call us in a non
- * safe context. Nowadays, unblank_screen() isn't to be called in
- * atomic contexts and is allowed to schedule (with the special case
- * of oops_in_progress, but that isn't of any concern for this
- * function. --BenH.
- */
- might_sleep();
- /* This isn't perfectly race free, but a race here would be mostly harmless,
- * at worst, we'll do a spurious blank and it's unlikely
- */
- del_timer(&console_timer);
- blank_timer_expired = 0;
- if (ignore_poke || !vc_cons[fg_console].d || vc_cons[fg_console].d->vc_mode == KD_GRAPHICS)
- return;
- if (console_blanked)
- unblank_screen();
- else if (blankinterval) {
- mod_timer(&console_timer, jiffies + (blankinterval * HZ));
- blank_state = blank_normal_wait;
- }
- }
- /*
- * Palettes
- */
- static void set_palette(struct vc_data *vc)
- {
- WARN_CONSOLE_UNLOCKED();
- if (vc->vc_mode != KD_GRAPHICS && vc->vc_sw->con_set_palette)
- vc->vc_sw->con_set_palette(vc, color_table);
- }
- /*
- * Load palette into the DAC registers. arg points to a colour
- * map, 3 bytes per colour, 16 colours, range from 0 to 255.
- */
- int con_set_cmap(unsigned char __user *arg)
- {
- int i, j, k;
- unsigned char colormap[3*16];
- if (copy_from_user(colormap, arg, sizeof(colormap)))
- return -EFAULT;
- console_lock();
- for (i = k = 0; i < 16; i++) {
- default_red[i] = colormap[k++];
- default_grn[i] = colormap[k++];
- default_blu[i] = colormap[k++];
- }
- for (i = 0; i < MAX_NR_CONSOLES; i++) {
- if (!vc_cons_allocated(i))
- continue;
- for (j = k = 0; j < 16; j++) {
- vc_cons[i].d->vc_palette[k++] = default_red[j];
- vc_cons[i].d->vc_palette[k++] = default_grn[j];
- vc_cons[i].d->vc_palette[k++] = default_blu[j];
- }
- set_palette(vc_cons[i].d);
- }
- console_unlock();
- return 0;
- }
- int con_get_cmap(unsigned char __user *arg)
- {
- int i, k;
- unsigned char colormap[3*16];
- console_lock();
- for (i = k = 0; i < 16; i++) {
- colormap[k++] = default_red[i];
- colormap[k++] = default_grn[i];
- colormap[k++] = default_blu[i];
- }
- console_unlock();
- if (copy_to_user(arg, colormap, sizeof(colormap)))
- return -EFAULT;
- return 0;
- }
- void reset_palette(struct vc_data *vc)
- {
- int j, k;
- for (j=k=0; j<16; j++) {
- vc->vc_palette[k++] = default_red[j];
- vc->vc_palette[k++] = default_grn[j];
- vc->vc_palette[k++] = default_blu[j];
- }
- set_palette(vc);
- }
- /*
- * Font switching
- *
- * Currently we only support fonts up to 32 pixels wide, at a maximum height
- * of 32 pixels. Userspace fontdata is stored with 32 bytes (shorts/ints,
- * depending on width) reserved for each character which is kinda wasty, but
- * this is done in order to maintain compatibility with the EGA/VGA fonts. It
- * is up to the actual low-level console-driver convert data into its favorite
- * format (maybe we should add a `fontoffset' field to the `display'
- * structure so we won't have to convert the fontdata all the time.
- * /Jes
- */
- #define max_font_size 65536
- static int con_font_get(struct vc_data *vc, struct console_font_op *op)
- {
- struct console_font font;
- int rc = -EINVAL;
- int c;
- if (op->data) {
- font.data = kmalloc(max_font_size, GFP_KERNEL);
- if (!font.data)
- return -ENOMEM;
- } else
- font.data = NULL;
- console_lock();
- if (vc->vc_mode != KD_TEXT)
- rc = -EINVAL;
- else if (vc->vc_sw->con_font_get)
- rc = vc->vc_sw->con_font_get(vc, &font);
- else
- rc = -ENOSYS;
- console_unlock();
- if (rc)
- goto out;
- c = (font.width+7)/8 * 32 * font.charcount;
- if (op->data && font.charcount > op->charcount)
- rc = -ENOSPC;
- if (font.width > op->width || font.height > op->height)
- rc = -ENOSPC;
- if (rc)
- goto out;
- op->height = font.height;
- op->width = font.width;
- op->charcount = font.charcount;
- if (op->data && copy_to_user(op->data, font.data, c))
- rc = -EFAULT;
- out:
- kfree(font.data);
- return rc;
- }
- static int con_font_set(struct vc_data *vc, struct console_font_op *op)
- {
- struct console_font font;
- int rc = -EINVAL;
- int size;
- if (vc->vc_mode != KD_TEXT)
- return -EINVAL;
- if (!op->data)
- return -EINVAL;
- if (op->charcount > 512)
- return -EINVAL;
- if (op->width <= 0 || op->width > 32 || !op->height || op->height > 32)
- return -EINVAL;
- size = (op->width+7)/8 * 32 * op->charcount;
- if (size > max_font_size)
- return -ENOSPC;
- font.data = memdup_user(op->data, size);
- if (IS_ERR(font.data))
- return PTR_ERR(font.data);
- font.charcount = op->charcount;
- font.width = op->width;
- font.height = op->height;
- console_lock();
- if (vc->vc_mode != KD_TEXT)
- rc = -EINVAL;
- else if (vc->vc_sw->con_font_set) {
- if (vc_is_sel(vc))
- clear_selection();
- rc = vc->vc_sw->con_font_set(vc, &font, op->flags);
- } else
- rc = -ENOSYS;
- console_unlock();
- kfree(font.data);
- return rc;
- }
- static int con_font_default(struct vc_data *vc, struct console_font_op *op)
- {
- struct console_font font = {.width = op->width, .height = op->height};
- char name[MAX_FONT_NAME];
- char *s = name;
- int rc;
- if (!op->data)
- s = NULL;
- else if (strncpy_from_user(name, op->data, MAX_FONT_NAME - 1) < 0)
- return -EFAULT;
- else
- name[MAX_FONT_NAME - 1] = 0;
- console_lock();
- if (vc->vc_mode != KD_TEXT) {
- console_unlock();
- return -EINVAL;
- }
- if (vc->vc_sw->con_font_default) {
- if (vc_is_sel(vc))
- clear_selection();
- rc = vc->vc_sw->con_font_default(vc, &font, s);
- } else
- rc = -ENOSYS;
- console_unlock();
- if (!rc) {
- op->width = font.width;
- op->height = font.height;
- }
- return rc;
- }
- int con_font_op(struct vc_data *vc, struct console_font_op *op)
- {
- switch (op->op) {
- case KD_FONT_OP_SET:
- return con_font_set(vc, op);
- case KD_FONT_OP_GET:
- return con_font_get(vc, op);
- case KD_FONT_OP_SET_DEFAULT:
- return con_font_default(vc, op);
- case KD_FONT_OP_COPY:
- /* was buggy and never really used */
- return -EINVAL;
- }
- return -ENOSYS;
- }
- /*
- * Interface exported to selection and vcs.
- */
- /* used by selection */
- u16 screen_glyph(const struct vc_data *vc, int offset)
- {
- u16 w = scr_readw(screenpos(vc, offset, true));
- u16 c = w & 0xff;
- if (w & vc->vc_hi_font_mask)
- c |= 0x100;
- return c;
- }
- EXPORT_SYMBOL_GPL(screen_glyph);
- u32 screen_glyph_unicode(const struct vc_data *vc, int n)
- {
- struct uni_screen *uniscr = get_vc_uniscr(vc);
- if (uniscr)
- return uniscr->lines[n / vc->vc_cols][n % vc->vc_cols];
- return inverse_translate(vc, screen_glyph(vc, n * 2), true);
- }
- EXPORT_SYMBOL_GPL(screen_glyph_unicode);
- /* used by vcs - note the word offset */
- unsigned short *screen_pos(const struct vc_data *vc, int w_offset, bool viewed)
- {
- return screenpos(vc, 2 * w_offset, viewed);
- }
- EXPORT_SYMBOL_GPL(screen_pos);
- void getconsxy(const struct vc_data *vc, unsigned char xy[static 2])
- {
- /* clamp values if they don't fit */
- xy[0] = min(vc->state.x, 0xFFu);
- xy[1] = min(vc->state.y, 0xFFu);
- }
- void putconsxy(struct vc_data *vc, unsigned char xy[static const 2])
- {
- hide_cursor(vc);
- gotoxy(vc, xy[0], xy[1]);
- set_cursor(vc);
- }
- u16 vcs_scr_readw(const struct vc_data *vc, const u16 *org)
- {
- if ((unsigned long)org == vc->vc_pos && softcursor_original != -1)
- return softcursor_original;
- return scr_readw(org);
- }
- void vcs_scr_writew(struct vc_data *vc, u16 val, u16 *org)
- {
- scr_writew(val, org);
- if ((unsigned long)org == vc->vc_pos) {
- softcursor_original = -1;
- add_softcursor(vc);
- }
- }
- void vcs_scr_updated(struct vc_data *vc)
- {
- notify_update(vc);
- }
- void vc_scrolldelta_helper(struct vc_data *c, int lines,
- unsigned int rolled_over, void *base, unsigned int size)
- {
- unsigned long ubase = (unsigned long)base;
- ptrdiff_t scr_end = (void *)c->vc_scr_end - base;
- ptrdiff_t vorigin = (void *)c->vc_visible_origin - base;
- ptrdiff_t origin = (void *)c->vc_origin - base;
- int margin = c->vc_size_row * 4;
- int from, wrap, from_off, avail;
- /* Turn scrollback off */
- if (!lines) {
- c->vc_visible_origin = c->vc_origin;
- return;
- }
- /* Do we have already enough to allow jumping from 0 to the end? */
- if (rolled_over > scr_end + margin) {
- from = scr_end;
- wrap = rolled_over + c->vc_size_row;
- } else {
- from = 0;
- wrap = size;
- }
- from_off = (vorigin - from + wrap) % wrap + lines * c->vc_size_row;
- avail = (origin - from + wrap) % wrap;
- /* Only a little piece would be left? Show all incl. the piece! */
- if (avail < 2 * margin)
- margin = 0;
- if (from_off < margin)
- from_off = 0;
- if (from_off > avail - margin)
- from_off = avail;
- c->vc_visible_origin = ubase + (from + from_off) % wrap;
- }
- EXPORT_SYMBOL_GPL(vc_scrolldelta_helper);
- /*
- * Visible symbols for modules
- */
- EXPORT_SYMBOL(color_table);
- EXPORT_SYMBOL(default_red);
- EXPORT_SYMBOL(default_grn);
- EXPORT_SYMBOL(default_blu);
- EXPORT_SYMBOL(update_region);
- EXPORT_SYMBOL(redraw_screen);
- EXPORT_SYMBOL(vc_resize);
- EXPORT_SYMBOL(fg_console);
- EXPORT_SYMBOL(console_blank_hook);
- EXPORT_SYMBOL(console_blanked);
- EXPORT_SYMBOL(vc_cons);
- EXPORT_SYMBOL(global_cursor_default);
- #ifndef VT_SINGLE_DRIVER
- EXPORT_SYMBOL(give_up_console);
- #endif
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