/* * arch/sh/kernel/setup.c * * This file handles the architecture-dependent parts of initialization * * Copyright (C) 1999 Niibe Yutaka * Copyright (C) 2002 - 2007 Paul Mundt */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern void * __rd_start, * __rd_end; /* * Machine setup.. */ /* * Initialize loops_per_jiffy as 10000000 (1000MIPS). * This value will be used at the very early stage of serial setup. * The bigger value means no problem. */ struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { [0] = { .type = CPU_SH_NONE, .loops_per_jiffy = 10000000, }, }; EXPORT_SYMBOL(cpu_data); /* * The machine vector. First entry in .machvec.init, or clobbered by * sh_mv= on the command line, prior to .machvec.init teardown. */ struct sh_machine_vector sh_mv = { .mv_name = "generic", }; #ifdef CONFIG_VT struct screen_info screen_info; #endif extern int root_mountflags; /* * This is set up by the setup-routine at boot-time */ #define PARAM ((unsigned char *)empty_zero_page) #define MOUNT_ROOT_RDONLY (*(unsigned long *) (PARAM+0x000)) #define RAMDISK_FLAGS (*(unsigned long *) (PARAM+0x004)) #define ORIG_ROOT_DEV (*(unsigned long *) (PARAM+0x008)) #define LOADER_TYPE (*(unsigned long *) (PARAM+0x00c)) #define INITRD_START (*(unsigned long *) (PARAM+0x010)) #define INITRD_SIZE (*(unsigned long *) (PARAM+0x014)) /* ... */ #define COMMAND_LINE ((char *) (PARAM+0x100)) #define RAMDISK_IMAGE_START_MASK 0x07FF #define RAMDISK_PROMPT_FLAG 0x8000 #define RAMDISK_LOAD_FLAG 0x4000 static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; static struct resource code_resource = { .name = "Kernel code", }; static struct resource data_resource = { .name = "Kernel data", }; unsigned long memory_start; EXPORT_SYMBOL(memory_start); unsigned long memory_end = 0; EXPORT_SYMBOL(memory_end); static int __init early_parse_mem(char *p) { unsigned long size; memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START; size = memparse(p, &p); memory_end = memory_start + size; return 0; } early_param("mem", early_parse_mem); /* * Register fully available low RAM pages with the bootmem allocator. */ static void __init register_bootmem_low_pages(void) { unsigned long curr_pfn, last_pfn, pages; /* * We are rounding up the start address of usable memory: */ curr_pfn = PFN_UP(__MEMORY_START); /* * ... and at the end of the usable range downwards: */ last_pfn = PFN_DOWN(__pa(memory_end)); if (last_pfn > max_low_pfn) last_pfn = max_low_pfn; pages = last_pfn - curr_pfn; free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); } #ifdef CONFIG_KEXEC static void __init reserve_crashkernel(void) { unsigned long long free_mem; unsigned long long crash_size, crash_base; int ret; free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; ret = parse_crashkernel(boot_command_line, free_mem, &crash_size, &crash_base); if (ret == 0 && crash_size) { if (crash_base > 0) { printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " "for crashkernel (System RAM: %ldMB)\n", (unsigned long)(crash_size >> 20), (unsigned long)(crash_base >> 20), (unsigned long)(free_mem >> 20)); crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; reserve_bootmem(crash_base, crash_size); } else printk(KERN_INFO "crashkernel reservation failed - " "you have to specify a base address\n"); } } #else static inline void __init reserve_crashkernel(void) {} #endif void __init setup_bootmem_allocator(unsigned long free_pfn) { unsigned long bootmap_size; /* * Find a proper area for the bootmem bitmap. After this * bootstrap step all allocations (until the page allocator * is intact) must be done via bootmem_alloc(). */ bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn, min_low_pfn, max_low_pfn); add_active_range(0, min_low_pfn, max_low_pfn); register_bootmem_low_pages(); node_set_online(0); /* * Reserve the kernel text and * Reserve the bootmem bitmap. We do this in two steps (first step * was init_bootmem()), because this catches the (definitely buggy) * case of us accidentally initializing the bootmem allocator with * an invalid RAM area. */ reserve_bootmem(__MEMORY_START+PAGE_SIZE, (PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START); /* * reserve physical page 0 - it's a special BIOS page on many boxes, * enabling clean reboots, SMP operation, laptop functions. */ reserve_bootmem(__MEMORY_START, PAGE_SIZE); sparse_memory_present_with_active_regions(0); #ifdef CONFIG_BLK_DEV_INITRD ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0); if (&__rd_start != &__rd_end) { LOADER_TYPE = 1; INITRD_START = PHYSADDR((unsigned long)&__rd_start) - __MEMORY_START; INITRD_SIZE = (unsigned long)&__rd_end - (unsigned long)&__rd_start; } if (LOADER_TYPE && INITRD_START) { if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { reserve_bootmem(INITRD_START + __MEMORY_START, INITRD_SIZE); initrd_start = INITRD_START + PAGE_OFFSET + __MEMORY_START; initrd_end = initrd_start + INITRD_SIZE; } else { printk("initrd extends beyond end of memory " "(0x%08lx > 0x%08lx)\ndisabling initrd\n", INITRD_START + INITRD_SIZE, max_low_pfn << PAGE_SHIFT); initrd_start = 0; } } #endif reserve_crashkernel(); } #ifndef CONFIG_NEED_MULTIPLE_NODES static void __init setup_memory(void) { unsigned long start_pfn; /* * Partially used pages are not usable - thus * we are rounding upwards: */ start_pfn = PFN_UP(__pa(_end)); setup_bootmem_allocator(start_pfn); } #else extern void __init setup_memory(void); #endif void __init setup_arch(char **cmdline_p) { enable_mmu(); ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); #ifdef CONFIG_BLK_DEV_RAM rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); #endif if (!MOUNT_ROOT_RDONLY) root_mountflags &= ~MS_RDONLY; init_mm.start_code = (unsigned long) _text; init_mm.end_code = (unsigned long) _etext; init_mm.end_data = (unsigned long) _edata; init_mm.brk = (unsigned long) _end; code_resource.start = virt_to_phys(_text); code_resource.end = virt_to_phys(_etext)-1; data_resource.start = virt_to_phys(_etext); data_resource.end = virt_to_phys(_edata)-1; memory_start = (unsigned long)PAGE_OFFSET+__MEMORY_START; if (!memory_end) memory_end = memory_start + __MEMORY_SIZE; #ifdef CONFIG_CMDLINE_BOOL strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); #else strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); #endif /* Save unparsed command line copy for /proc/cmdline */ memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); *cmdline_p = command_line; parse_early_param(); sh_mv_setup(); /* * Find the highest page frame number we have available */ max_pfn = PFN_DOWN(__pa(memory_end)); /* * Determine low and high memory ranges: */ max_low_pfn = max_pfn; min_low_pfn = __MEMORY_START >> PAGE_SHIFT; nodes_clear(node_online_map); /* Setup bootmem with available RAM */ setup_memory(); sparse_init(); #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; #endif /* Perform the machine specific initialisation */ if (likely(sh_mv.mv_setup)) sh_mv.mv_setup(cmdline_p); paging_init(); #ifdef CONFIG_SMP plat_smp_setup(); #endif } static const char *cpu_name[] = { [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619", [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706", [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708", [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710", [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720", [CPU_SH7729] = "SH7729", [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S", [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751", [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760", [CPU_ST40RA] = "ST40RA", [CPU_ST40GX1] = "ST40GX1", [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501", [CPU_SH7770] = "SH7770", [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781", [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785", [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3", [CPU_SH_NONE] = "Unknown" }; const char *get_cpu_subtype(struct sh_cpuinfo *c) { return cpu_name[c->type]; } #ifdef CONFIG_PROC_FS /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */ static const char *cpu_flags[] = { "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", "ptea", "llsc", "l2", "op32", NULL }; static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c) { unsigned long i; seq_printf(m, "cpu flags\t:"); if (!c->flags) { seq_printf(m, " %s\n", cpu_flags[0]); return; } for (i = 0; cpu_flags[i]; i++) if ((c->flags & (1 << i))) seq_printf(m, " %s", cpu_flags[i+1]); seq_printf(m, "\n"); } static void show_cacheinfo(struct seq_file *m, const char *type, struct cache_info info) { unsigned int cache_size; cache_size = info.ways * info.sets * info.linesz; seq_printf(m, "%s size\t: %2dKiB (%d-way)\n", type, cache_size >> 10, info.ways); } /* * Get CPU information for use by the procfs. */ static int show_cpuinfo(struct seq_file *m, void *v) { struct sh_cpuinfo *c = v; unsigned int cpu = c - cpu_data; if (!cpu_online(cpu)) return 0; if (cpu == 0) seq_printf(m, "machine\t\t: %s\n", get_system_type()); seq_printf(m, "processor\t: %d\n", cpu); seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine); seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c)); show_cpuflags(m, c); seq_printf(m, "cache type\t: "); /* * Check for what type of cache we have, we support both the * unified cache on the SH-2 and SH-3, as well as the harvard * style cache on the SH-4. */ if (c->icache.flags & SH_CACHE_COMBINED) { seq_printf(m, "unified\n"); show_cacheinfo(m, "cache", c->icache); } else { seq_printf(m, "split (harvard)\n"); show_cacheinfo(m, "icache", c->icache); show_cacheinfo(m, "dcache", c->dcache); } /* Optional secondary cache */ if (c->flags & CPU_HAS_L2_CACHE) show_cacheinfo(m, "scache", c->scache); seq_printf(m, "bogomips\t: %lu.%02lu\n", c->loops_per_jiffy/(500000/HZ), (c->loops_per_jiffy/(5000/HZ)) % 100); return 0; } static void *c_start(struct seq_file *m, loff_t *pos) { return *pos < NR_CPUS ? cpu_data + *pos : NULL; } static void *c_next(struct seq_file *m, void *v, loff_t *pos) { ++*pos; return c_start(m, pos); } static void c_stop(struct seq_file *m, void *v) { } struct seq_operations cpuinfo_op = { .start = c_start, .next = c_next, .stop = c_stop, .show = show_cpuinfo, }; #endif /* CONFIG_PROC_FS */