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- /*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1995 Linus Torvalds
- * Copyright (C) 1995 Waldorf Electronics
- * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle
- * Copyright (C) 1996 Stoned Elipot
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki
- */
- #include <linux/init.h>
- #include <linux/cpu.h>
- #include <linux/delay.h>
- #include <linux/ioport.h>
- #include <linux/export.h>
- #include <linux/screen_info.h>
- #include <linux/memblock.h>
- #include <linux/initrd.h>
- #include <linux/root_dev.h>
- #include <linux/highmem.h>
- #include <linux/console.h>
- #include <linux/pfn.h>
- #include <linux/debugfs.h>
- #include <linux/kexec.h>
- #include <linux/sizes.h>
- #include <linux/device.h>
- #include <linux/dma-map-ops.h>
- #include <linux/decompress/generic.h>
- #include <linux/of_fdt.h>
- #include <linux/dmi.h>
- #include <linux/crash_dump.h>
- #include <asm/addrspace.h>
- #include <asm/bootinfo.h>
- #include <asm/bugs.h>
- #include <asm/cache.h>
- #include <asm/cdmm.h>
- #include <asm/cpu.h>
- #include <asm/debug.h>
- #include <asm/mmzone.h>
- #include <asm/sections.h>
- #include <asm/setup.h>
- #include <asm/smp-ops.h>
- #include <asm/prom.h>
- #include <asm/fw/fw.h>
- #ifdef CONFIG_MIPS_ELF_APPENDED_DTB
- char __section(".appended_dtb") __appended_dtb[0x100000];
- #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */
- struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly;
- EXPORT_SYMBOL(cpu_data);
- #ifdef CONFIG_VT
- struct screen_info screen_info;
- #endif
- /*
- * Setup information
- *
- * These are initialized so they are in the .data section
- */
- unsigned long mips_machtype __read_mostly = MACH_UNKNOWN;
- EXPORT_SYMBOL(mips_machtype);
- static char __initdata command_line[COMMAND_LINE_SIZE];
- char __initdata arcs_cmdline[COMMAND_LINE_SIZE];
- #ifdef CONFIG_CMDLINE_BOOL
- static const char builtin_cmdline[] __initconst = CONFIG_CMDLINE;
- #else
- static const char builtin_cmdline[] __initconst = "";
- #endif
- /*
- * mips_io_port_base is the begin of the address space to which x86 style
- * I/O ports are mapped.
- */
- unsigned long mips_io_port_base = -1;
- EXPORT_SYMBOL(mips_io_port_base);
- static struct resource code_resource = { .name = "Kernel code", };
- static struct resource data_resource = { .name = "Kernel data", };
- static struct resource bss_resource = { .name = "Kernel bss", };
- unsigned long __kaslr_offset __ro_after_init;
- EXPORT_SYMBOL(__kaslr_offset);
- static void *detect_magic __initdata = detect_memory_region;
- #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
- unsigned long ARCH_PFN_OFFSET;
- EXPORT_SYMBOL(ARCH_PFN_OFFSET);
- #endif
- void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max)
- {
- void *dm = &detect_magic;
- phys_addr_t size;
- for (size = sz_min; size < sz_max; size <<= 1) {
- if (!memcmp(dm, dm + size, sizeof(detect_magic)))
- break;
- }
- pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n",
- ((unsigned long long) size) / SZ_1M,
- (unsigned long long) start,
- ((unsigned long long) sz_min) / SZ_1M,
- ((unsigned long long) sz_max) / SZ_1M);
- memblock_add(start, size);
- }
- /*
- * Manage initrd
- */
- #ifdef CONFIG_BLK_DEV_INITRD
- static int __init rd_start_early(char *p)
- {
- unsigned long start = memparse(p, &p);
- #ifdef CONFIG_64BIT
- /* Guess if the sign extension was forgotten by bootloader */
- if (start < XKPHYS)
- start = (int)start;
- #endif
- initrd_start = start;
- initrd_end += start;
- return 0;
- }
- early_param("rd_start", rd_start_early);
- static int __init rd_size_early(char *p)
- {
- initrd_end += memparse(p, &p);
- return 0;
- }
- early_param("rd_size", rd_size_early);
- /* it returns the next free pfn after initrd */
- static unsigned long __init init_initrd(void)
- {
- unsigned long end;
- /*
- * Board specific code or command line parser should have
- * already set up initrd_start and initrd_end. In these cases
- * perfom sanity checks and use them if all looks good.
- */
- if (!initrd_start || initrd_end <= initrd_start)
- goto disable;
- if (initrd_start & ~PAGE_MASK) {
- pr_err("initrd start must be page aligned\n");
- goto disable;
- }
- /*
- * Sanitize initrd addresses. For example firmware
- * can't guess if they need to pass them through
- * 64-bits values if the kernel has been built in pure
- * 32-bit. We need also to switch from KSEG0 to XKPHYS
- * addresses now, so the code can now safely use __pa().
- */
- end = __pa(initrd_end);
- initrd_end = (unsigned long)__va(end);
- initrd_start = (unsigned long)__va(__pa(initrd_start));
- if (initrd_start < PAGE_OFFSET) {
- pr_err("initrd start < PAGE_OFFSET\n");
- goto disable;
- }
- ROOT_DEV = Root_RAM0;
- return PFN_UP(end);
- disable:
- initrd_start = 0;
- initrd_end = 0;
- return 0;
- }
- /* In some conditions (e.g. big endian bootloader with a little endian
- kernel), the initrd might appear byte swapped. Try to detect this and
- byte swap it if needed. */
- static void __init maybe_bswap_initrd(void)
- {
- #if defined(CONFIG_CPU_CAVIUM_OCTEON)
- u64 buf;
- /* Check for CPIO signature */
- if (!memcmp((void *)initrd_start, "070701", 6))
- return;
- /* Check for compressed initrd */
- if (decompress_method((unsigned char *)initrd_start, 8, NULL))
- return;
- /* Try again with a byte swapped header */
- buf = swab64p((u64 *)initrd_start);
- if (!memcmp(&buf, "070701", 6) ||
- decompress_method((unsigned char *)(&buf), 8, NULL)) {
- unsigned long i;
- pr_info("Byteswapped initrd detected\n");
- for (i = initrd_start; i < ALIGN(initrd_end, 8); i += 8)
- swab64s((u64 *)i);
- }
- #endif
- }
- static void __init finalize_initrd(void)
- {
- unsigned long size = initrd_end - initrd_start;
- if (size == 0) {
- printk(KERN_INFO "Initrd not found or empty");
- goto disable;
- }
- if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) {
- printk(KERN_ERR "Initrd extends beyond end of memory");
- goto disable;
- }
- maybe_bswap_initrd();
- memblock_reserve(__pa(initrd_start), size);
- initrd_below_start_ok = 1;
- pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n",
- initrd_start, size);
- return;
- disable:
- printk(KERN_CONT " - disabling initrd\n");
- initrd_start = 0;
- initrd_end = 0;
- }
- #else /* !CONFIG_BLK_DEV_INITRD */
- static unsigned long __init init_initrd(void)
- {
- return 0;
- }
- #define finalize_initrd() do {} while (0)
- #endif
- /*
- * Initialize the bootmem allocator. It also setup initrd related data
- * if needed.
- */
- #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON64) && defined(CONFIG_NUMA))
- static void __init bootmem_init(void)
- {
- init_initrd();
- finalize_initrd();
- }
- #else /* !CONFIG_SGI_IP27 */
- static void __init bootmem_init(void)
- {
- phys_addr_t ramstart, ramend;
- unsigned long start, end;
- int i;
- ramstart = memblock_start_of_DRAM();
- ramend = memblock_end_of_DRAM();
- /*
- * Sanity check any INITRD first. We don't take it into account
- * for bootmem setup initially, rely on the end-of-kernel-code
- * as our memory range starting point. Once bootmem is inited we
- * will reserve the area used for the initrd.
- */
- init_initrd();
- /* Reserve memory occupied by kernel. */
- memblock_reserve(__pa_symbol(&_text),
- __pa_symbol(&_end) - __pa_symbol(&_text));
- /* max_low_pfn is not a number of pages but the end pfn of low mem */
- #ifdef CONFIG_MIPS_AUTO_PFN_OFFSET
- ARCH_PFN_OFFSET = PFN_UP(ramstart);
- #else
- /*
- * Reserve any memory between the start of RAM and PHYS_OFFSET
- */
- if (ramstart > PHYS_OFFSET)
- memblock_reserve(PHYS_OFFSET, ramstart - PHYS_OFFSET);
- if (PFN_UP(ramstart) > ARCH_PFN_OFFSET) {
- pr_info("Wasting %lu bytes for tracking %lu unused pages\n",
- (unsigned long)((PFN_UP(ramstart) - ARCH_PFN_OFFSET) * sizeof(struct page)),
- (unsigned long)(PFN_UP(ramstart) - ARCH_PFN_OFFSET));
- }
- #endif
- min_low_pfn = ARCH_PFN_OFFSET;
- max_pfn = PFN_DOWN(ramend);
- for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, NULL) {
- /*
- * Skip highmem here so we get an accurate max_low_pfn if low
- * memory stops short of high memory.
- * If the region overlaps HIGHMEM_START, end is clipped so
- * max_pfn excludes the highmem portion.
- */
- if (start >= PFN_DOWN(HIGHMEM_START))
- continue;
- if (end > PFN_DOWN(HIGHMEM_START))
- end = PFN_DOWN(HIGHMEM_START);
- if (end > max_low_pfn)
- max_low_pfn = end;
- }
- if (min_low_pfn >= max_low_pfn)
- panic("Incorrect memory mapping !!!");
- if (max_pfn > PFN_DOWN(HIGHMEM_START)) {
- #ifdef CONFIG_HIGHMEM
- highstart_pfn = PFN_DOWN(HIGHMEM_START);
- highend_pfn = max_pfn;
- #else
- max_low_pfn = PFN_DOWN(HIGHMEM_START);
- max_pfn = max_low_pfn;
- #endif
- }
- /*
- * Reserve initrd memory if needed.
- */
- finalize_initrd();
- }
- #endif /* CONFIG_SGI_IP27 */
- static int usermem __initdata;
- static int __init early_parse_mem(char *p)
- {
- phys_addr_t start, size;
- if (!p) {
- pr_err("mem parameter is empty, do nothing\n");
- return -EINVAL;
- }
- /*
- * If a user specifies memory size, we
- * blow away any automatically generated
- * size.
- */
- if (usermem == 0) {
- usermem = 1;
- memblock_remove(memblock_start_of_DRAM(),
- memblock_end_of_DRAM() - memblock_start_of_DRAM());
- }
- start = 0;
- size = memparse(p, &p);
- if (*p == '@')
- start = memparse(p + 1, &p);
- if (IS_ENABLED(CONFIG_NUMA))
- memblock_add_node(start, size, pa_to_nid(start), MEMBLOCK_NONE);
- else
- memblock_add(start, size);
- return 0;
- }
- early_param("mem", early_parse_mem);
- static int __init early_parse_memmap(char *p)
- {
- char *oldp;
- u64 start_at, mem_size;
- if (!p)
- return -EINVAL;
- if (!strncmp(p, "exactmap", 8)) {
- pr_err("\"memmap=exactmap\" invalid on MIPS\n");
- return 0;
- }
- oldp = p;
- mem_size = memparse(p, &p);
- if (p == oldp)
- return -EINVAL;
- if (*p == '@') {
- start_at = memparse(p+1, &p);
- memblock_add(start_at, mem_size);
- } else if (*p == '#') {
- pr_err("\"memmap=nn#ss\" (force ACPI data) invalid on MIPS\n");
- return -EINVAL;
- } else if (*p == '$') {
- start_at = memparse(p+1, &p);
- memblock_add(start_at, mem_size);
- memblock_reserve(start_at, mem_size);
- } else {
- pr_err("\"memmap\" invalid format!\n");
- return -EINVAL;
- }
- if (*p == '\0') {
- usermem = 1;
- return 0;
- } else
- return -EINVAL;
- }
- early_param("memmap", early_parse_memmap);
- static void __init mips_reserve_vmcore(void)
- {
- #ifdef CONFIG_PROC_VMCORE
- phys_addr_t start, end;
- u64 i;
- if (!elfcorehdr_size) {
- for_each_mem_range(i, &start, &end) {
- if (elfcorehdr_addr >= start && elfcorehdr_addr < end) {
- /*
- * Reserve from the elf core header to the end of
- * the memory segment, that should all be kdump
- * reserved memory.
- */
- elfcorehdr_size = end - elfcorehdr_addr;
- break;
- }
- }
- }
- pr_info("Reserving %ldKB of memory at %ldKB for kdump\n",
- (unsigned long)elfcorehdr_size >> 10, (unsigned long)elfcorehdr_addr >> 10);
- memblock_reserve(elfcorehdr_addr, elfcorehdr_size);
- #endif
- }
- #ifdef CONFIG_KEXEC
- /* 64M alignment for crash kernel regions */
- #define CRASH_ALIGN SZ_64M
- #define CRASH_ADDR_MAX SZ_512M
- static void __init mips_parse_crashkernel(void)
- {
- unsigned long long total_mem;
- unsigned long long crash_size, crash_base;
- int ret;
- total_mem = memblock_phys_mem_size();
- ret = parse_crashkernel(boot_command_line, total_mem,
- &crash_size, &crash_base);
- if (ret != 0 || crash_size <= 0)
- return;
- if (crash_base <= 0) {
- crash_base = memblock_phys_alloc_range(crash_size, CRASH_ALIGN,
- CRASH_ALIGN,
- CRASH_ADDR_MAX);
- if (!crash_base) {
- pr_warn("crashkernel reservation failed - No suitable area found.\n");
- return;
- }
- } else {
- unsigned long long start;
- start = memblock_phys_alloc_range(crash_size, 1,
- crash_base,
- crash_base + crash_size);
- if (start != crash_base) {
- pr_warn("Invalid memory region reserved for crash kernel\n");
- return;
- }
- }
- crashk_res.start = crash_base;
- crashk_res.end = crash_base + crash_size - 1;
- }
- static void __init request_crashkernel(struct resource *res)
- {
- int ret;
- if (crashk_res.start == crashk_res.end)
- return;
- ret = request_resource(res, &crashk_res);
- if (!ret)
- pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n",
- (unsigned long)(resource_size(&crashk_res) >> 20),
- (unsigned long)(crashk_res.start >> 20));
- }
- #else /* !defined(CONFIG_KEXEC) */
- static void __init mips_parse_crashkernel(void)
- {
- }
- static void __init request_crashkernel(struct resource *res)
- {
- }
- #endif /* !defined(CONFIG_KEXEC) */
- static void __init check_kernel_sections_mem(void)
- {
- phys_addr_t start = __pa_symbol(&_text);
- phys_addr_t size = __pa_symbol(&_end) - start;
- if (!memblock_is_region_memory(start, size)) {
- pr_info("Kernel sections are not in the memory maps\n");
- memblock_add(start, size);
- }
- }
- static void __init bootcmdline_append(const char *s, size_t max)
- {
- if (!s[0] || !max)
- return;
- if (boot_command_line[0])
- strlcat(boot_command_line, " ", COMMAND_LINE_SIZE);
- strlcat(boot_command_line, s, max);
- }
- #ifdef CONFIG_OF_EARLY_FLATTREE
- static int __init bootcmdline_scan_chosen(unsigned long node, const char *uname,
- int depth, void *data)
- {
- bool *dt_bootargs = data;
- const char *p;
- int l;
- if (depth != 1 || !data ||
- (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
- return 0;
- p = of_get_flat_dt_prop(node, "bootargs", &l);
- if (p != NULL && l > 0) {
- bootcmdline_append(p, min(l, COMMAND_LINE_SIZE));
- *dt_bootargs = true;
- }
- return 1;
- }
- #endif /* CONFIG_OF_EARLY_FLATTREE */
- static void __init bootcmdline_init(void)
- {
- bool dt_bootargs = false;
- /*
- * If CMDLINE_OVERRIDE is enabled then initializing the command line is
- * trivial - we simply use the built-in command line unconditionally &
- * unmodified.
- */
- if (IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
- strscpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
- return;
- }
- /*
- * If the user specified a built-in command line &
- * MIPS_CMDLINE_BUILTIN_EXTEND, then the built-in command line is
- * prepended to arguments from the bootloader or DT so we'll copy them
- * to the start of boot_command_line here. Otherwise, empty
- * boot_command_line to undo anything early_init_dt_scan_chosen() did.
- */
- if (IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
- strscpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE);
- else
- boot_command_line[0] = 0;
- #ifdef CONFIG_OF_EARLY_FLATTREE
- /*
- * If we're configured to take boot arguments from DT, look for those
- * now.
- */
- if (IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) ||
- IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND))
- of_scan_flat_dt(bootcmdline_scan_chosen, &dt_bootargs);
- #endif
- /*
- * If we didn't get any arguments from DT (regardless of whether that's
- * because we weren't configured to look for them, or because we looked
- * & found none) then we'll take arguments from the bootloader.
- * plat_mem_setup() should have filled arcs_cmdline with arguments from
- * the bootloader.
- */
- if (IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) || !dt_bootargs)
- bootcmdline_append(arcs_cmdline, COMMAND_LINE_SIZE);
- /*
- * If the user specified a built-in command line & we didn't already
- * prepend it, we append it to boot_command_line here.
- */
- if (IS_ENABLED(CONFIG_CMDLINE_BOOL) &&
- !IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND))
- bootcmdline_append(builtin_cmdline, COMMAND_LINE_SIZE);
- }
- /*
- * arch_mem_init - initialize memory management subsystem
- *
- * o plat_mem_setup() detects the memory configuration and will record detected
- * memory areas using memblock_add.
- *
- * At this stage the memory configuration of the system is known to the
- * kernel but generic memory management system is still entirely uninitialized.
- *
- * o bootmem_init()
- * o sparse_init()
- * o paging_init()
- * o dma_contiguous_reserve()
- *
- * At this stage the bootmem allocator is ready to use.
- *
- * NOTE: historically plat_mem_setup did the entire platform initialization.
- * This was rather impractical because it meant plat_mem_setup had to
- * get away without any kind of memory allocator. To keep old code from
- * breaking plat_setup was just renamed to plat_mem_setup and a second platform
- * initialization hook for anything else was introduced.
- */
- static void __init arch_mem_init(char **cmdline_p)
- {
- /* call board setup routine */
- plat_mem_setup();
- memblock_set_bottom_up(true);
- bootcmdline_init();
- strscpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
- *cmdline_p = command_line;
- parse_early_param();
- if (usermem)
- pr_info("User-defined physical RAM map overwrite\n");
- check_kernel_sections_mem();
- early_init_fdt_reserve_self();
- early_init_fdt_scan_reserved_mem();
- #ifndef CONFIG_NUMA
- memblock_set_node(0, PHYS_ADDR_MAX, &memblock.memory, 0);
- #endif
- bootmem_init();
- /*
- * Prevent memblock from allocating high memory.
- * This cannot be done before max_low_pfn is detected, so up
- * to this point is possible to only reserve physical memory
- * with memblock_reserve; memblock_alloc* can be used
- * only after this point
- */
- memblock_set_current_limit(PFN_PHYS(max_low_pfn));
- mips_reserve_vmcore();
- mips_parse_crashkernel();
- device_tree_init();
- /*
- * In order to reduce the possibility of kernel panic when failed to
- * get IO TLB memory under CONFIG_SWIOTLB, it is better to allocate
- * low memory as small as possible before plat_swiotlb_setup(), so
- * make sparse_init() using top-down allocation.
- */
- memblock_set_bottom_up(false);
- sparse_init();
- memblock_set_bottom_up(true);
- plat_swiotlb_setup();
- dma_contiguous_reserve(PFN_PHYS(max_low_pfn));
- /* Reserve for hibernation. */
- memblock_reserve(__pa_symbol(&__nosave_begin),
- __pa_symbol(&__nosave_end) - __pa_symbol(&__nosave_begin));
- early_memtest(PFN_PHYS(ARCH_PFN_OFFSET), PFN_PHYS(max_low_pfn));
- }
- static void __init resource_init(void)
- {
- phys_addr_t start, end;
- u64 i;
- if (UNCAC_BASE != IO_BASE)
- return;
- code_resource.start = __pa_symbol(&_text);
- code_resource.end = __pa_symbol(&_etext) - 1;
- data_resource.start = __pa_symbol(&_etext);
- data_resource.end = __pa_symbol(&_edata) - 1;
- bss_resource.start = __pa_symbol(&__bss_start);
- bss_resource.end = __pa_symbol(&__bss_stop) - 1;
- for_each_mem_range(i, &start, &end) {
- struct resource *res;
- res = memblock_alloc(sizeof(struct resource), SMP_CACHE_BYTES);
- if (!res)
- panic("%s: Failed to allocate %zu bytes\n", __func__,
- sizeof(struct resource));
- res->start = start;
- /*
- * In memblock, end points to the first byte after the
- * range while in resourses, end points to the last byte in
- * the range.
- */
- res->end = end - 1;
- res->flags = IORESOURCE_SYSTEM_RAM | IORESOURCE_BUSY;
- res->name = "System RAM";
- request_resource(&iomem_resource, res);
- /*
- * We don't know which RAM region contains kernel data,
- * so we try it repeatedly and let the resource manager
- * test it.
- */
- request_resource(res, &code_resource);
- request_resource(res, &data_resource);
- request_resource(res, &bss_resource);
- request_crashkernel(res);
- }
- }
- #ifdef CONFIG_SMP
- static void __init prefill_possible_map(void)
- {
- int i, possible = num_possible_cpus();
- if (possible > nr_cpu_ids)
- possible = nr_cpu_ids;
- for (i = 0; i < possible; i++)
- set_cpu_possible(i, true);
- for (; i < NR_CPUS; i++)
- set_cpu_possible(i, false);
- set_nr_cpu_ids(possible);
- }
- #else
- static inline void prefill_possible_map(void) {}
- #endif
- static void __init setup_rng_seed(void)
- {
- char *rng_seed_hex = fw_getenv("rngseed");
- u8 rng_seed[512];
- size_t len;
- if (!rng_seed_hex)
- return;
- len = min(sizeof(rng_seed), strlen(rng_seed_hex) / 2);
- if (hex2bin(rng_seed, rng_seed_hex, len))
- return;
- add_bootloader_randomness(rng_seed, len);
- memzero_explicit(rng_seed, len);
- memzero_explicit(rng_seed_hex, len * 2);
- }
- void __init setup_arch(char **cmdline_p)
- {
- cpu_probe();
- mips_cm_probe();
- prom_init();
- setup_early_fdc_console();
- #ifdef CONFIG_EARLY_PRINTK
- setup_early_printk();
- #endif
- cpu_report();
- check_bugs_early();
- #if defined(CONFIG_VT)
- #if defined(CONFIG_VGA_CONSOLE)
- conswitchp = &vga_con;
- #endif
- #endif
- arch_mem_init(cmdline_p);
- dmi_setup();
- resource_init();
- plat_smp_setup();
- prefill_possible_map();
- cpu_cache_init();
- paging_init();
- memblock_dump_all();
- setup_rng_seed();
- }
- unsigned long kernelsp[NR_CPUS];
- unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
- #ifdef CONFIG_DEBUG_FS
- struct dentry *mips_debugfs_dir;
- static int __init debugfs_mips(void)
- {
- mips_debugfs_dir = debugfs_create_dir("mips", NULL);
- return 0;
- }
- arch_initcall(debugfs_mips);
- #endif
- #ifdef CONFIG_DMA_NONCOHERENT
- static int __init setcoherentio(char *str)
- {
- dma_default_coherent = true;
- pr_info("Hardware DMA cache coherency (command line)\n");
- return 0;
- }
- early_param("coherentio", setcoherentio);
- static int __init setnocoherentio(char *str)
- {
- dma_default_coherent = false;
- pr_info("Software DMA cache coherency (command line)\n");
- return 0;
- }
- early_param("nocoherentio", setnocoherentio);
- #endif
- void __init arch_cpu_finalize_init(void)
- {
- unsigned int cpu = smp_processor_id();
- cpu_data[cpu].udelay_val = loops_per_jiffy;
- check_bugs32();
- if (IS_ENABLED(CONFIG_CPU_R4X00_BUGS64))
- check_bugs64();
- }
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