Blackfin arch: unify cplbinfo files
Merge MPU and noMPU version of CPLB info code to one common version. Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger
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arch/blackfin/kernel/cplbinfo.c
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200
arch/blackfin/kernel/cplbinfo.c
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/*
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* arch/blackfin/kernel/cplbinfo.c - display CPLB status
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*
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* Copyright 2004-2008 Analog Devices Inc.
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/uaccess.h>
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#include <asm/cplbinit.h>
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#include <asm/blackfin.h>
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typedef enum { ICPLB, DCPLB } cplb_type;
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static char page_strtbl[][3] = { "1K", "4K", "1M", "4M" };
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#define page(flags) (((flags) & 0x30000) >> 16)
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#define strpage(flags) page_strtbl[page(flags)]
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#ifdef CONFIG_MPU
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static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
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{
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struct cplb_entry *tbl;
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int switched;
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int i;
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if (type == ICPLB) {
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tbl = icplb_tbl[cpu];
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switched = first_switched_icplb;
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} else {
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tbl = dcplb_tbl[cpu];
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switched = first_switched_dcplb;
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}
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buf += sprintf(buf, "Index\tAddress\t\tData\tSize\tU/RD\tU/WR\tS/WR\tSwitch\n");
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for (i = 0; i < MAX_CPLBS; ++i) {
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unsigned long data = tbl[i].data;
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unsigned long addr = tbl[i].addr;
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if (!(data & CPLB_VALID))
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continue;
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buf += sprintf(buf,
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"%d\t0x%08lx\t%05lx\t%s\t%c\t%c\t%c\t%c\n",
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i, addr, data, strpage(data),
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(data & CPLB_USER_RD) ? 'Y' : 'N',
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(data & CPLB_USER_WR) ? 'Y' : 'N',
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(data & CPLB_SUPV_WR) ? 'Y' : 'N',
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i < switched ? 'N' : 'Y');
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}
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buf += sprintf(buf, "\n");
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return buf;
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}
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#else
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static int page_size_table[4] = {
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0x00000400, /* 1K */
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0x00001000, /* 4K */
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0x00100000, /* 1M */
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0x00400000 /* 4M */
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};
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static int cplb_find_entry(unsigned long *cplb_addr,
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unsigned long *cplb_data, unsigned long addr,
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unsigned long data)
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{
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int i;
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for (i = 0; i < 16; ++i)
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if (addr >= cplb_addr[i] &&
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addr < cplb_addr[i] + page_size_table[page(cplb_data[i])] &&
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cplb_data[i] == data)
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return i;
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return -1;
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}
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static char *cplb_print_entry(char *buf, cplb_type type, unsigned int cpu)
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{
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unsigned long *p_addr, *p_data, *p_icount, *p_ocount;
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unsigned long *cplb_addr, *cplb_data;
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int entry = 0, used_cplb = 0;
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if (type == ICPLB) {
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p_addr = ipdt_tables[cpu];
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p_data = ipdt_tables[cpu] + 1;
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p_icount = ipdt_swapcount_tables[cpu];
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p_ocount = ipdt_swapcount_tables[cpu] + 1;
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cplb_addr = (unsigned long *)ICPLB_ADDR0;
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cplb_data = (unsigned long *)ICPLB_DATA0;
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} else {
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p_addr = dpdt_tables[cpu];
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p_data = dpdt_tables[cpu] + 1;
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p_icount = dpdt_swapcount_tables[cpu];
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p_ocount = dpdt_swapcount_tables[cpu] + 1;
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cplb_addr = (unsigned long *)DCPLB_ADDR0;
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cplb_data = (unsigned long *)DCPLB_DATA0;
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}
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buf += sprintf(buf, "Address\t\tData\tSize\tValid\tLocked\tSwapin\tiCount\toCount\n");
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while (*p_addr != 0xffffffff) {
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entry = cplb_find_entry(cplb_addr, cplb_data, *p_addr, *p_data);
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if (entry >= 0)
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used_cplb |= 1 << entry;
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buf += sprintf(buf,
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"0x%08lx\t0x%05lx\t%s\t%c\t%c\t%2d\t%ld\t%ld\n",
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*p_addr, *p_data, strpage(*p_data),
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(*p_data & CPLB_VALID) ? 'Y' : 'N',
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(*p_data & CPLB_LOCK) ? 'Y' : 'N', entry, *p_icount,
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*p_ocount);
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p_addr += 2;
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p_data += 2;
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p_icount += 2;
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p_ocount += 2;
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}
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if (used_cplb != 0xffff) {
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buf += sprintf(buf, "Unused/mismatched CPLBs:\n");
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for (entry = 0; entry < 16; ++entry)
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if (0 == ((1 << entry) & used_cplb)) {
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int flags = cplb_data[entry];
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buf += sprintf(buf,
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"%2d: 0x%08lx\t0x%05x\t%s\t%c\t%c\n",
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entry, cplb_addr[entry], flags, strpage(flags),
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(flags & CPLB_VALID) ? 'Y' : 'N',
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(flags & CPLB_LOCK) ? 'Y' : 'N');
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}
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}
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buf += sprintf(buf, "\n");
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return buf;
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}
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#endif
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static int cplbinfo_proc_output(char *buf, void *data)
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{
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unsigned int cpu = (unsigned int)data;
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char *p = buf;
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if (bfin_read_IMEM_CONTROL() & ENICPLB) {
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p += sprintf(p, "Instruction CPLB entry:\n");
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p = cplb_print_entry(p, ICPLB, cpu);
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} else
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p += sprintf(p, "Instruction CPLB is disabled.\n\n");
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if (bfin_read_DMEM_CONTROL() & ENDCPLB) {
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p += sprintf(p, "Data CPLB entry:\n");
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p = cplb_print_entry(p, DCPLB, cpu);
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} else
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p += sprintf(p, "Data CPLB is disabled.\n\n");
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return p - buf;
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}
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static int cplbinfo_read_proc(char *page, char **start, off_t off,
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int count, int *eof, void *data)
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{
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int len = cplbinfo_proc_output(page, data);
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if (len <= off + count)
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*eof = 1;
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*start = page + off;
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len -= off;
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return max(min(len, count), 0);
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}
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static int __init cplbinfo_init(void)
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{
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struct proc_dir_entry *parent, *entry;
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unsigned int cpu;
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unsigned char str[10];
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parent = proc_mkdir("cplbinfo", NULL);
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if (!parent)
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return -ENOMEM;
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for_each_online_cpu(cpu) {
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sprintf(str, "cpu%u", cpu);
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entry = create_proc_entry(str, 0, parent);
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if (!entry)
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return -ENOMEM;
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entry->read_proc = cplbinfo_read_proc;
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entry->data = (void *)cpu;
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}
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return 0;
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}
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late_initcall(cplbinfo_init);
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