diff options
Diffstat (limited to 'arch/sh/kernel/setup.c')
| -rw-r--r-- | arch/sh/kernel/setup.c | 419 |
1 files changed, 149 insertions, 270 deletions
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index ff4f54a47c0..de19cfa768f 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -4,7 +4,7 @@ * This file handles the architecture-dependent parts of initialization * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2002 - 2007 Paul Mundt + * Copyright (C) 2002 - 2010 Paul Mundt */ #include <linux/screen_info.h> #include <linux/ioport.h> @@ -12,7 +12,6 @@ #include <linux/initrd.h> #include <linux/bootmem.h> #include <linux/console.h> -#include <linux/seq_file.h> #include <linux/root_dev.h> #include <linux/utsname.h> #include <linux/nodemask.h> @@ -23,6 +22,13 @@ #include <linux/kexec.h> #include <linux/module.h> #include <linux/smp.h> +#include <linux/err.h> +#include <linux/crash_dump.h> +#include <linux/mmzone.h> +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/platform_device.h> +#include <linux/memblock.h> #include <asm/uaccess.h> #include <asm/io.h> #include <asm/page.h> @@ -31,7 +37,10 @@ #include <asm/irq.h> #include <asm/setup.h> #include <asm/clock.h> +#include <asm/smp.h> #include <asm/mmu_context.h> +#include <asm/mmzone.h> +#include <asm/sparsemem.h> /* * Initialize loops_per_jiffy as 10000000 (1000MIPS). @@ -41,7 +50,9 @@ struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { [0] = { .type = CPU_SH_NONE, + .family = CPU_FAMILY_UNKNOWN, .loops_per_jiffy = 10000000, + .phys_bits = MAX_PHYSMEM_BITS, }, }; EXPORT_SYMBOL(cpu_data); @@ -51,6 +62,7 @@ EXPORT_SYMBOL(cpu_data); * sh_mv= on the command line, prior to .machvec.init teardown. */ struct sh_machine_vector sh_mv = { .mv_name = "generic", }; +EXPORT_SYMBOL(sh_mv); #ifdef CONFIG_VT struct screen_info screen_info; @@ -74,173 +86,157 @@ static struct resource data_resource = { .flags = IORESOURCE_BUSY | IORESOURCE_MEM, }; +static struct resource bss_resource = { + .name = "Kernel bss", + .flags = IORESOURCE_BUSY | IORESOURCE_MEM, +}; + unsigned long memory_start; EXPORT_SYMBOL(memory_start); unsigned long memory_end = 0; EXPORT_SYMBOL(memory_end); +unsigned long memory_limit = 0; + +static struct resource mem_resources[MAX_NUMNODES]; int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; static int __init early_parse_mem(char *p) { - unsigned long size; - - memory_start = (unsigned long)__va(__MEMORY_START); - size = memparse(p, &p); - - if (size > __MEMORY_SIZE) { - static char msg[] __initdata = KERN_ERR - "Using mem= to increase the size of kernel memory " - "is not allowed.\n" - " Recompile the kernel with the correct value for " - "CONFIG_MEMORY_SIZE.\n"; - printk(msg); - return 0; - } + if (!p) + return 1; - memory_end = memory_start + size; + memory_limit = PAGE_ALIGN(memparse(p, &p)); + + pr_notice("Memory limited to %ldMB\n", memory_limit >> 20); 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) +void __init check_for_initrd(void) { - unsigned long curr_pfn, last_pfn, pages; +#ifdef CONFIG_BLK_DEV_INITRD + unsigned long start, end; + + /* + * Check for the rare cases where boot loaders adhere to the boot + * ABI. + */ + if (!LOADER_TYPE || !INITRD_START || !INITRD_SIZE) + goto disable; + + start = INITRD_START + __MEMORY_START; + end = start + INITRD_SIZE; + + if (unlikely(end <= start)) + goto disable; + if (unlikely(start & ~PAGE_MASK)) { + pr_err("initrd must be page aligned\n"); + goto disable; + } + + if (unlikely(start < __MEMORY_START)) { + pr_err("initrd start (%08lx) < __MEMORY_START(%x)\n", + start, __MEMORY_START); + goto disable; + } + + if (unlikely(end > memblock_end_of_DRAM())) { + pr_err("initrd extends beyond end of memory " + "(0x%08lx > 0x%08lx)\ndisabling initrd\n", + end, (unsigned long)memblock_end_of_DRAM()); + goto disable; + } /* - * We are rounding up the start address of usable memory: + * If we got this far in spite of the boot loader's best efforts + * to the contrary, assume we actually have a valid initrd and + * fix up the root dev. */ - curr_pfn = PFN_UP(__MEMORY_START); + ROOT_DEV = Root_RAM0; /* - * ... and at the end of the usable range downwards: + * Address sanitization */ - last_pfn = PFN_DOWN(__pa(memory_end)); + initrd_start = (unsigned long)__va(start); + initrd_end = initrd_start + INITRD_SIZE; + + memblock_reserve(__pa(initrd_start), INITRD_SIZE); - if (last_pfn > max_low_pfn) - last_pfn = max_low_pfn; + return; - pages = last_pfn - curr_pfn; - free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); +disable: + pr_info("initrd disabled\n"); + initrd_start = initrd_end = 0; +#endif } -#ifdef CONFIG_KEXEC -static void __init reserve_crashkernel(void) +void calibrate_delay(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 "crashkernel reservation failed - " - "you have to specify a base address\n"); - return; - } - - if (reserve_bootmem(crash_base, crash_size, - BOOTMEM_EXCLUSIVE) < 0) { - printk(KERN_INFO "crashkernel reservation failed - " - "memory is in use\n"); - return; - } - - 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; - } + struct clk *clk = clk_get(NULL, "cpu_clk"); + + if (IS_ERR(clk)) + panic("Need a sane CPU clock definition!"); + + loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ; + + printk(KERN_INFO "Calibrating delay loop (skipped)... " + "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n", + loops_per_jiffy/(500000/HZ), + (loops_per_jiffy/(5000/HZ)) % 100, + loops_per_jiffy); } -#else -static inline void __init reserve_crashkernel(void) -{} -#endif -void __init setup_bootmem_allocator(unsigned long free_pfn) +void __init __add_active_range(unsigned int nid, unsigned long start_pfn, + unsigned long end_pfn) { - unsigned long bootmap_size; + struct resource *res = &mem_resources[nid]; + unsigned long start, end; - /* - * 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); + WARN_ON(res->name); /* max one active range per node for now */ - add_active_range(0, min_low_pfn, max_low_pfn); - register_bootmem_low_pages(); + start = start_pfn << PAGE_SHIFT; + end = end_pfn << PAGE_SHIFT; - node_set_online(0); + res->name = "System RAM"; + res->start = start; + res->end = end - 1; + res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; + + if (request_resource(&iomem_resource, res)) { + pr_err("unable to request memory_resource 0x%lx 0x%lx\n", + start_pfn, end_pfn); + return; + } /* - * 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. + * We don't know which RAM region contains kernel data or + * the reserved crashkernel region, so try it repeatedly + * and let the resource manager test it. */ - reserve_bootmem(__MEMORY_START+PAGE_SIZE, - (PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START, - BOOTMEM_DEFAULT); + request_resource(res, &code_resource); + request_resource(res, &data_resource); + request_resource(res, &bss_resource); +#ifdef CONFIG_KEXEC + request_resource(res, &crashk_res); +#endif /* - * reserve physical page 0 - it's a special BIOS page on many boxes, - * enabling clean reboots, SMP operation, laptop functions. + * Also make sure that there is a PMB mapping that covers this + * range before we attempt to activate it, to avoid reset by MMU. + * We can hit this path with NUMA or memory hot-add. */ - reserve_bootmem(__MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT); - - sparse_memory_present_with_active_regions(0); - -#ifdef CONFIG_BLK_DEV_INITRD - ROOT_DEV = Root_RAM0; + pmb_bolt_mapping((unsigned long)__va(start), start, end - start, + PAGE_KERNEL); - if (LOADER_TYPE && INITRD_START) { - if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { - reserve_bootmem(INITRD_START + __MEMORY_START, - INITRD_SIZE, BOOTMEM_DEFAULT); - 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(); + memblock_set_node(PFN_PHYS(start_pfn), PFN_PHYS(end_pfn - start_pfn), + &memblock.memory, nid); } -#ifndef CONFIG_NEED_MULTIPLE_NODES -static void __init setup_memory(void) +void __init __weak plat_early_device_setup(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) { @@ -248,6 +244,17 @@ void __init setup_arch(char **cmdline_p) ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); + printk(KERN_NOTICE "Boot params:\n" + "... MOUNT_ROOT_RDONLY - %08lx\n" + "... RAMDISK_FLAGS - %08lx\n" + "... ORIG_ROOT_DEV - %08lx\n" + "... LOADER_TYPE - %08lx\n" + "... INITRD_START - %08lx\n" + "... INITRD_SIZE - %08lx\n", + MOUNT_ROOT_RDONLY, RAMDISK_FLAGS, + ORIG_ROOT_DEV, LOADER_TYPE, + INITRD_START, INITRD_SIZE); + #ifdef CONFIG_BLK_DEV_RAM rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); @@ -265,15 +272,17 @@ void __init setup_arch(char **cmdline_p) code_resource.end = virt_to_phys(_etext)-1; data_resource.start = virt_to_phys(_etext); data_resource.end = virt_to_phys(_edata)-1; + bss_resource.start = virt_to_phys(__bss_start); + bss_resource.end = virt_to_phys(__bss_stop)-1; - memory_start = (unsigned long)__va(__MEMORY_START); - if (!memory_end) - memory_end = memory_start + __MEMORY_SIZE; - -#ifdef CONFIG_CMDLINE_BOOL +#ifdef CONFIG_CMDLINE_OVERWRITE strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); #else strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); +#ifdef CONFIG_CMDLINE_EXTEND + strlcat(command_line, " ", sizeof(command_line)); + strlcat(command_line, CONFIG_CMDLINE, sizeof(command_line)); +#endif #endif /* Save unparsed command line copy for /proc/cmdline */ @@ -282,24 +291,14 @@ void __init setup_arch(char **cmdline_p) parse_early_param(); - sh_mv_setup(); + plat_early_device_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; + sh_mv_setup(); - nodes_clear(node_online_map); + /* Let earlyprintk output early console messages */ + early_platform_driver_probe("earlyprintk", 1, 1); - /* Setup bootmem with available RAM */ - setup_memory(); - sparse_init(); + paging_init(); #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -309,137 +308,17 @@ void __init setup_arch(char **cmdline_p) 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_SH7203] = "SH7203", [CPU_SH7263] = "SH7263", - [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_SH7721] = "SH7721", [CPU_SH7729] = "SH7729", - [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S", - [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751", - [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760", - [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501", - [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770", - [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781", - [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785", - [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3", - [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103", - [CPU_SH7366] = "SH7366", [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) +/* processor boot mode configuration */ +int generic_mode_pins(void) { - 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); - + pr_warning("generic_mode_pins(): missing mode pin configuration\n"); 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) +int test_mode_pin(int pin) { - ++*pos; - return c_start(m, pos); + return sh_mv.mv_mode_pins() & pin; } -static void c_stop(struct seq_file *m, void *v) -{ -} -const struct seq_operations cpuinfo_op = { - .start = c_start, - .next = c_next, - .stop = c_stop, - .show = show_cpuinfo, -}; -#endif /* CONFIG_PROC_FS */ |