| /* |
| * 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/ioport.h> |
| #include <linux/export.h> |
| #include <linux/screen_info.h> |
| #include <linux/memblock.h> |
| #include <linux/bootmem.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-contiguous.h> |
| #include <linux/decompress/generic.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/sections.h> |
| #include <asm/setup.h> |
| #include <asm/smp-ops.h> |
| #include <asm/prom.h> |
| |
| #ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
| const 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); |
| |
| struct boot_mem_map boot_mem_map; |
| |
| static char __initdata command_line[COMMAND_LINE_SIZE]; |
| char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; |
| |
| #ifdef CONFIG_CMDLINE_BOOL |
| static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; |
| #endif |
| |
| /* |
| * mips_io_port_base is the begin of the address space to which x86 style |
| * I/O ports are mapped. |
| */ |
| const 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 void *detect_magic __initdata = detect_memory_region; |
| |
| void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type) |
| { |
| int x = boot_mem_map.nr_map; |
| int i; |
| |
| /* |
| * If the region reaches the top of the physical address space, adjust |
| * the size slightly so that (start + size) doesn't overflow |
| */ |
| if (start + size - 1 == (phys_addr_t)ULLONG_MAX) |
| --size; |
| |
| /* Sanity check */ |
| if (start + size < start) { |
| pr_warn("Trying to add an invalid memory region, skipped\n"); |
| return; |
| } |
| |
| /* |
| * Try to merge with existing entry, if any. |
| */ |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| struct boot_mem_map_entry *entry = boot_mem_map.map + i; |
| unsigned long top; |
| |
| if (entry->type != type) |
| continue; |
| |
| if (start + size < entry->addr) |
| continue; /* no overlap */ |
| |
| if (entry->addr + entry->size < start) |
| continue; /* no overlap */ |
| |
| top = max(entry->addr + entry->size, start + size); |
| entry->addr = min(entry->addr, start); |
| entry->size = top - entry->addr; |
| |
| return; |
| } |
| |
| if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
| pr_err("Ooops! Too many entries in the memory map!\n"); |
| return; |
| } |
| |
| boot_mem_map.map[x].addr = start; |
| boot_mem_map.map[x].size = size; |
| boot_mem_map.map[x].type = type; |
| boot_mem_map.nr_map++; |
| } |
| |
| 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); |
| |
| add_memory_region(start, size, BOOT_MEM_RAM); |
| } |
| |
| static void __init print_memory_map(void) |
| { |
| int i; |
| const int field = 2 * sizeof(unsigned long); |
| |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
| field, (unsigned long long) boot_mem_map.map[i].size, |
| field, (unsigned long long) boot_mem_map.map[i].addr); |
| |
| switch (boot_mem_map.map[i].type) { |
| case BOOT_MEM_RAM: |
| printk(KERN_CONT "(usable)\n"); |
| break; |
| case BOOT_MEM_INIT_RAM: |
| printk(KERN_CONT "(usable after init)\n"); |
| break; |
| case BOOT_MEM_ROM_DATA: |
| printk(KERN_CONT "(ROM data)\n"); |
| break; |
| case BOOT_MEM_RESERVED: |
| printk(KERN_CONT "(reserved)\n"); |
| break; |
| default: |
| printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
| break; |
| } |
| } |
| } |
| |
| /* |
| * 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; |
| } |
| if (initrd_start < PAGE_OFFSET) { |
| pr_err("initrd start < PAGE_OFFSET\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)); |
| |
| 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(); |
| |
| reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
| 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_LOONGSON3) && defined(CONFIG_NUMA)) |
| |
| static void __init bootmem_init(void) |
| { |
| init_initrd(); |
| finalize_initrd(); |
| } |
| |
| #else /* !CONFIG_SGI_IP27 */ |
| |
| static void __init bootmem_init(void) |
| { |
| unsigned long reserved_end; |
| unsigned long mapstart = ~0UL; |
| unsigned long bootmap_size; |
| int i; |
| |
| /* |
| * 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(); |
| reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); |
| |
| /* |
| * max_low_pfn is not a number of pages. The number of pages |
| * of the system is given by 'max_low_pfn - min_low_pfn'. |
| */ |
| min_low_pfn = ~0UL; |
| max_low_pfn = 0; |
| |
| /* |
| * Find the highest page frame number we have available. |
| */ |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| unsigned long start, end; |
| |
| if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| continue; |
| |
| start = PFN_UP(boot_mem_map.map[i].addr); |
| end = PFN_DOWN(boot_mem_map.map[i].addr |
| + boot_mem_map.map[i].size); |
| |
| if (end > max_low_pfn) |
| max_low_pfn = end; |
| if (start < min_low_pfn) |
| min_low_pfn = start; |
| if (end <= reserved_end) |
| continue; |
| #ifdef CONFIG_BLK_DEV_INITRD |
| /* Skip zones before initrd and initrd itself */ |
| if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) |
| continue; |
| #endif |
| if (start >= mapstart) |
| continue; |
| mapstart = max(reserved_end, start); |
| } |
| |
| if (min_low_pfn >= max_low_pfn) |
| panic("Incorrect memory mapping !!!"); |
| if (min_low_pfn > ARCH_PFN_OFFSET) { |
| pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
| (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), |
| min_low_pfn - ARCH_PFN_OFFSET); |
| } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
| pr_info("%lu free pages won't be used\n", |
| ARCH_PFN_OFFSET - min_low_pfn); |
| } |
| min_low_pfn = ARCH_PFN_OFFSET; |
| |
| /* |
| * Determine low and high memory ranges |
| */ |
| max_pfn = max_low_pfn; |
| if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
| #ifdef CONFIG_HIGHMEM |
| highstart_pfn = PFN_DOWN(HIGHMEM_START); |
| highend_pfn = max_low_pfn; |
| #endif |
| max_low_pfn = PFN_DOWN(HIGHMEM_START); |
| } |
| |
| #ifdef CONFIG_BLK_DEV_INITRD |
| /* |
| * mapstart should be after initrd_end |
| */ |
| if (initrd_end) |
| mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); |
| #endif |
| |
| /* |
| * Initialize the boot-time allocator with low memory only. |
| */ |
| bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
| min_low_pfn, max_low_pfn); |
| |
| |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| unsigned long start, end; |
| |
| start = PFN_UP(boot_mem_map.map[i].addr); |
| end = PFN_DOWN(boot_mem_map.map[i].addr |
| + boot_mem_map.map[i].size); |
| |
| if (start <= min_low_pfn) |
| start = min_low_pfn; |
| if (start >= end) |
| continue; |
| |
| #ifndef CONFIG_HIGHMEM |
| if (end > max_low_pfn) |
| end = max_low_pfn; |
| |
| /* |
| * ... finally, is the area going away? |
| */ |
| if (end <= start) |
| continue; |
| #endif |
| |
| memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
| } |
| |
| /* |
| * Register fully available low RAM pages with the bootmem allocator. |
| */ |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| unsigned long start, end, size; |
| |
| start = PFN_UP(boot_mem_map.map[i].addr); |
| end = PFN_DOWN(boot_mem_map.map[i].addr |
| + boot_mem_map.map[i].size); |
| |
| /* |
| * Reserve usable memory. |
| */ |
| switch (boot_mem_map.map[i].type) { |
| case BOOT_MEM_RAM: |
| break; |
| case BOOT_MEM_INIT_RAM: |
| memory_present(0, start, end); |
| continue; |
| default: |
| /* Not usable memory */ |
| continue; |
| } |
| |
| /* |
| * We are rounding up the start address of usable memory |
| * and at the end of the usable range downwards. |
| */ |
| if (start >= max_low_pfn) |
| continue; |
| if (start < reserved_end) |
| start = reserved_end; |
| if (end > max_low_pfn) |
| end = max_low_pfn; |
| |
| /* |
| * ... finally, is the area going away? |
| */ |
| if (end <= start) |
| continue; |
| size = end - start; |
| |
| /* Register lowmem ranges */ |
| free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
| memory_present(0, start, end); |
| } |
| |
| /* |
| * Reserve the bootmap memory. |
| */ |
| reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
| |
| #ifdef CONFIG_RELOCATABLE |
| /* |
| * The kernel reserves all memory below its _end symbol as bootmem, |
| * but the kernel may now be at a much higher address. The memory |
| * between the original and new locations may be returned to the system. |
| */ |
| if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) { |
| unsigned long offset; |
| extern void show_kernel_relocation(const char *level); |
| |
| offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS); |
| free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset); |
| |
| #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO) |
| /* |
| * This information is necessary when debugging the kernel |
| * But is a security vulnerability otherwise! |
| */ |
| show_kernel_relocation(KERN_INFO); |
| #endif |
| } |
| #endif |
| |
| /* |
| * Reserve initrd memory if needed. |
| */ |
| finalize_initrd(); |
| } |
| |
| #endif /* CONFIG_SGI_IP27 */ |
| |
| /* |
| * arch_mem_init - initialize memory management subsystem |
| * |
| * o plat_mem_setup() detects the memory configuration and will record detected |
| * memory areas using add_memory_region. |
| * |
| * 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 int usermem __initdata; |
| |
| static int __init early_parse_mem(char *p) |
| { |
| phys_addr_t start, size; |
| |
| /* |
| * If a user specifies memory size, we |
| * blow away any automatically generated |
| * size. |
| */ |
| if (usermem == 0) { |
| boot_mem_map.nr_map = 0; |
| usermem = 1; |
| } |
| start = 0; |
| size = memparse(p, &p); |
| if (*p == '@') |
| start = memparse(p + 1, &p); |
| |
| add_memory_region(start, size, BOOT_MEM_RAM); |
| return 0; |
| } |
| early_param("mem", early_parse_mem); |
| |
| #ifdef CONFIG_PROC_VMCORE |
| unsigned long setup_elfcorehdr, setup_elfcorehdr_size; |
| static int __init early_parse_elfcorehdr(char *p) |
| { |
| int i; |
| |
| setup_elfcorehdr = memparse(p, &p); |
| |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| unsigned long start = boot_mem_map.map[i].addr; |
| unsigned long end = (boot_mem_map.map[i].addr + |
| boot_mem_map.map[i].size); |
| if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { |
| /* |
| * Reserve from the elf core header to the end of |
| * the memory segment, that should all be kdump |
| * reserved memory. |
| */ |
| setup_elfcorehdr_size = end - setup_elfcorehdr; |
| break; |
| } |
| } |
| /* |
| * If we don't find it in the memory map, then we shouldn't |
| * have to worry about it, as the new kernel won't use it. |
| */ |
| return 0; |
| } |
| early_param("elfcorehdr", early_parse_elfcorehdr); |
| #endif |
| |
| static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
| { |
| phys_addr_t size; |
| int i; |
| |
| size = end - mem; |
| if (!size) |
| return; |
| |
| /* Make sure it is in the boot_mem_map */ |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| if (mem >= boot_mem_map.map[i].addr && |
| mem < (boot_mem_map.map[i].addr + |
| boot_mem_map.map[i].size)) |
| return; |
| } |
| add_memory_region(mem, size, type); |
| } |
| |
| #ifdef CONFIG_KEXEC |
| static inline unsigned long long get_total_mem(void) |
| { |
| unsigned long long total; |
| |
| total = max_pfn - min_low_pfn; |
| return total << PAGE_SHIFT; |
| } |
| |
| static void __init mips_parse_crashkernel(void) |
| { |
| unsigned long long total_mem; |
| unsigned long long crash_size, crash_base; |
| int ret; |
| |
| total_mem = get_total_mem(); |
| ret = parse_crashkernel(boot_command_line, total_mem, |
| &crash_size, &crash_base); |
| if (ret != 0 || crash_size <= 0) |
| return; |
| |
| crashk_res.start = crash_base; |
| crashk_res.end = crash_base + crash_size - 1; |
| } |
| |
| static void __init request_crashkernel(struct resource *res) |
| { |
| int ret; |
| |
| ret = request_resource(res, &crashk_res); |
| if (!ret) |
| pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", |
| (unsigned long)((crashk_res.end - |
| crashk_res.start + 1) >> 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) */ |
| |
| #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER) |
| #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) |
| #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) |
| #define BUILTIN_EXTEND_WITH_PROM \ |
| IS_ENABLED(CONFIG_MIPS_CMDLINE_BUILTIN_EXTEND) |
| |
| static void __init arch_mem_init(char **cmdline_p) |
| { |
| struct memblock_region *reg; |
| extern void plat_mem_setup(void); |
| |
| /* call board setup routine */ |
| plat_mem_setup(); |
| |
| /* |
| * Make sure all kernel memory is in the maps. The "UP" and |
| * "DOWN" are opposite for initdata since if it crosses over |
| * into another memory section you don't want that to be |
| * freed when the initdata is freed. |
| */ |
| arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, |
| PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, |
| BOOT_MEM_RAM); |
| arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, |
| PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, |
| BOOT_MEM_INIT_RAM); |
| |
| pr_info("Determined physical RAM map:\n"); |
| print_memory_map(); |
| |
| #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE) |
| strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| #else |
| if ((USE_PROM_CMDLINE && arcs_cmdline[0]) || |
| (USE_DTB_CMDLINE && !boot_command_line[0])) |
| strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| |
| if (EXTEND_WITH_PROM && arcs_cmdline[0]) { |
| if (boot_command_line[0]) |
| strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
| strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| } |
| |
| #if defined(CONFIG_CMDLINE_BOOL) |
| if (builtin_cmdline[0]) { |
| if (boot_command_line[0]) |
| strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
| strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
| } |
| |
| if (BUILTIN_EXTEND_WITH_PROM && arcs_cmdline[0]) { |
| if (boot_command_line[0]) |
| strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
| strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); |
| } |
| #endif |
| #endif |
| strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
| |
| *cmdline_p = command_line; |
| |
| parse_early_param(); |
| |
| if (usermem) { |
| pr_info("User-defined physical RAM map:\n"); |
| print_memory_map(); |
| } |
| |
| bootmem_init(); |
| #ifdef CONFIG_PROC_VMCORE |
| if (setup_elfcorehdr && setup_elfcorehdr_size) { |
| printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", |
| setup_elfcorehdr, setup_elfcorehdr_size); |
| reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, |
| BOOTMEM_DEFAULT); |
| } |
| #endif |
| |
| mips_parse_crashkernel(); |
| #ifdef CONFIG_KEXEC |
| if (crashk_res.start != crashk_res.end) |
| reserve_bootmem(crashk_res.start, |
| crashk_res.end - crashk_res.start + 1, |
| BOOTMEM_DEFAULT); |
| #endif |
| device_tree_init(); |
| sparse_init(); |
| plat_swiotlb_setup(); |
| |
| dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); |
| /* Tell bootmem about cma reserved memblock section */ |
| for_each_memblock(reserved, reg) |
| if (reg->size != 0) |
| reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); |
| |
| reserve_bootmem_region(__pa_symbol(&__nosave_begin), |
| __pa_symbol(&__nosave_end)); /* Reserve for hibernation */ |
| } |
| |
| static void __init resource_init(void) |
| { |
| int 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; |
| |
| for (i = 0; i < boot_mem_map.nr_map; i++) { |
| struct resource *res; |
| unsigned long start, end; |
| |
| start = boot_mem_map.map[i].addr; |
| end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; |
| if (start >= HIGHMEM_START) |
| continue; |
| if (end >= HIGHMEM_START) |
| end = HIGHMEM_START - 1; |
| |
| res = alloc_bootmem(sizeof(struct resource)); |
| |
| res->start = start; |
| res->end = end; |
| res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| |
| switch (boot_mem_map.map[i].type) { |
| case BOOT_MEM_RAM: |
| case BOOT_MEM_INIT_RAM: |
| case BOOT_MEM_ROM_DATA: |
| res->name = "System RAM"; |
| res->flags |= IORESOURCE_SYSRAM; |
| break; |
| case BOOT_MEM_RESERVED: |
| default: |
| res->name = "reserved"; |
| } |
| |
| 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_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); |
| |
| nr_cpu_ids = possible; |
| } |
| #else |
| static inline void prefill_possible_map(void) {} |
| #endif |
| |
| 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; |
| #elif defined(CONFIG_DUMMY_CONSOLE) |
| conswitchp = &dummy_con; |
| #endif |
| #endif |
| |
| arch_mem_init(cmdline_p); |
| |
| resource_init(); |
| plat_smp_setup(); |
| prefill_possible_map(); |
| |
| cpu_cache_init(); |
| paging_init(); |
| } |
| |
| unsigned long kernelsp[NR_CPUS]; |
| unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; |
| |
| #ifdef CONFIG_USE_OF |
| unsigned long fw_passed_dtb; |
| #endif |
| |
| #ifdef CONFIG_DEBUG_FS |
| struct dentry *mips_debugfs_dir; |
| static int __init debugfs_mips(void) |
| { |
| struct dentry *d; |
| |
| d = debugfs_create_dir("mips", NULL); |
| if (!d) |
| return -ENOMEM; |
| mips_debugfs_dir = d; |
| return 0; |
| } |
| arch_initcall(debugfs_mips); |
| #endif |