Paul Mundt | 711fa80 | 2006-10-03 13:14:04 +0900 | [diff] [blame] | 1 | /* |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 2 | * arch/sh/kernel/setup.c |
| 3 | * |
| 4 | * This file handles the architecture-dependent parts of initialization |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * |
| 6 | * Copyright (C) 1999 Niibe Yutaka |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 7 | * Copyright (C) 2002 - 2007 Paul Mundt |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | */ |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 9 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | #include <linux/ioport.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/initrd.h> |
| 13 | #include <linux/bootmem.h> |
| 14 | #include <linux/console.h> |
| 15 | #include <linux/seq_file.h> |
| 16 | #include <linux/root_dev.h> |
| 17 | #include <linux/utsname.h> |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 18 | #include <linux/nodemask.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/cpu.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 20 | #include <linux/pfn.h> |
Paul Mundt | 711fa80 | 2006-10-03 13:14:04 +0900 | [diff] [blame] | 21 | #include <linux/fs.h> |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 22 | #include <linux/mm.h> |
Paul Mundt | 4d5ade5 | 2007-04-27 11:25:57 +0900 | [diff] [blame] | 23 | #include <linux/kexec.h> |
Paul Mundt | 98d877c | 2007-07-20 16:59:49 +0900 | [diff] [blame] | 24 | #include <linux/module.h> |
Paul Mundt | 0016a12 | 2007-09-21 18:39:49 +0900 | [diff] [blame] | 25 | #include <linux/smp.h> |
Paul Mundt | b9e393c | 2008-03-07 17:19:58 +0900 | [diff] [blame] | 26 | #include <linux/err.h> |
| 27 | #include <linux/debugfs.h> |
Simon Horman | daf423d | 2008-07-30 10:29:39 +1000 | [diff] [blame] | 28 | #include <linux/crash_dump.h> |
Paul Mundt | fa43972 | 2008-09-04 18:53:58 +0900 | [diff] [blame] | 29 | #include <linux/mmzone.h> |
Paul Mundt | cf204fa | 2008-09-08 20:47:42 +0900 | [diff] [blame] | 30 | #include <linux/clk.h> |
| 31 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include <asm/uaccess.h> |
| 33 | #include <asm/io.h> |
Paul Mundt | 7a302a9 | 2007-05-14 12:50:43 +0900 | [diff] [blame] | 34 | #include <asm/page.h> |
Paul Mundt | cd01204 | 2007-12-10 15:50:28 +0900 | [diff] [blame] | 35 | #include <asm/elf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <asm/sections.h> |
| 37 | #include <asm/irq.h> |
| 38 | #include <asm/setup.h> |
Paul Mundt | de02797 | 2006-02-01 03:06:02 -0800 | [diff] [blame] | 39 | #include <asm/clock.h> |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 40 | #include <asm/mmu_context.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | /* |
| 43 | * Initialize loops_per_jiffy as 10000000 (1000MIPS). |
| 44 | * This value will be used at the very early stage of serial setup. |
| 45 | * The bigger value means no problem. |
| 46 | */ |
Paul Mundt | 2d4a73d | 2007-09-21 18:01:40 +0900 | [diff] [blame] | 47 | struct sh_cpuinfo cpu_data[NR_CPUS] __read_mostly = { |
| 48 | [0] = { |
| 49 | .type = CPU_SH_NONE, |
| 50 | .loops_per_jiffy = 10000000, |
| 51 | }, |
| 52 | }; |
| 53 | EXPORT_SYMBOL(cpu_data); |
Paul Mundt | 82f81f4 | 2007-05-15 15:19:34 +0900 | [diff] [blame] | 54 | |
| 55 | /* |
| 56 | * The machine vector. First entry in .machvec.init, or clobbered by |
| 57 | * sh_mv= on the command line, prior to .machvec.init teardown. |
| 58 | */ |
Paul Mundt | fd8f20e | 2007-05-15 15:38:30 +0900 | [diff] [blame] | 59 | struct sh_machine_vector sh_mv = { .mv_name = "generic", }; |
Paul Mundt | 971ac16 | 2008-04-25 16:01:38 +0900 | [diff] [blame] | 60 | EXPORT_SYMBOL(sh_mv); |
Paul Mundt | 82f81f4 | 2007-05-15 15:19:34 +0900 | [diff] [blame] | 61 | |
Paul Mundt | 2c7834a | 2006-09-27 18:17:31 +0900 | [diff] [blame] | 62 | #ifdef CONFIG_VT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | struct screen_info screen_info; |
Paul Mundt | 2c7834a | 2006-09-27 18:17:31 +0900 | [diff] [blame] | 64 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | extern int root_mountflags; |
| 67 | |
Paul Mundt | 65463b7 | 2005-11-07 00:58:24 -0800 | [diff] [blame] | 68 | #define RAMDISK_IMAGE_START_MASK 0x07FF |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | #define RAMDISK_PROMPT_FLAG 0x8000 |
Paul Mundt | 65463b7 | 2005-11-07 00:58:24 -0800 | [diff] [blame] | 70 | #define RAMDISK_LOAD_FLAG 0x4000 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Alon Bar-Lev | 53c8262 | 2007-02-12 00:54:19 -0800 | [diff] [blame] | 72 | static char __initdata command_line[COMMAND_LINE_SIZE] = { 0, }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
Paul Mundt | 69d1ef4 | 2007-10-30 17:32:08 +0900 | [diff] [blame] | 74 | static struct resource code_resource = { |
| 75 | .name = "Kernel code", |
| 76 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 77 | }; |
| 78 | |
| 79 | static struct resource data_resource = { |
| 80 | .name = "Kernel data", |
| 81 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 82 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | |
Magnus Damm | 3d83984 | 2008-04-23 20:50:27 +0900 | [diff] [blame] | 84 | static struct resource bss_resource = { |
| 85 | .name = "Kernel bss", |
| 86 | .flags = IORESOURCE_BUSY | IORESOURCE_MEM, |
| 87 | }; |
| 88 | |
Paul Mundt | 98d877c | 2007-07-20 16:59:49 +0900 | [diff] [blame] | 89 | unsigned long memory_start; |
| 90 | EXPORT_SYMBOL(memory_start); |
Paul Mundt | 7e5186e | 2007-10-30 17:18:08 +0900 | [diff] [blame] | 91 | unsigned long memory_end = 0; |
Paul Mundt | 98d877c | 2007-07-20 16:59:49 +0900 | [diff] [blame] | 92 | EXPORT_SYMBOL(memory_end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
Magnus Damm | 0146ba7 | 2008-04-23 20:56:44 +0900 | [diff] [blame] | 94 | static struct resource mem_resources[MAX_NUMNODES]; |
| 95 | |
Paul Mundt | cd01204 | 2007-12-10 15:50:28 +0900 | [diff] [blame] | 96 | int l1i_cache_shape, l1d_cache_shape, l2_cache_shape; |
| 97 | |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 98 | static int __init early_parse_mem(char *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 100 | unsigned long size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Stuart Menefy | d02b08f | 2007-11-30 17:52:53 +0900 | [diff] [blame] | 102 | memory_start = (unsigned long)__va(__MEMORY_START); |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 103 | size = memparse(p, &p); |
Stuart Menefy | 80a68a4 | 2007-11-26 21:16:09 +0900 | [diff] [blame] | 104 | |
| 105 | if (size > __MEMORY_SIZE) { |
| 106 | static char msg[] __initdata = KERN_ERR |
| 107 | "Using mem= to increase the size of kernel memory " |
| 108 | "is not allowed.\n" |
| 109 | " Recompile the kernel with the correct value for " |
| 110 | "CONFIG_MEMORY_SIZE.\n"; |
| 111 | printk(msg); |
| 112 | return 0; |
| 113 | } |
| 114 | |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 115 | memory_end = memory_start + size; |
Paul Mundt | 2c7834a | 2006-09-27 18:17:31 +0900 | [diff] [blame] | 116 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | return 0; |
| 118 | } |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 119 | early_param("mem", early_parse_mem); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 121 | /* |
| 122 | * Register fully available low RAM pages with the bootmem allocator. |
| 123 | */ |
| 124 | static void __init register_bootmem_low_pages(void) |
| 125 | { |
| 126 | unsigned long curr_pfn, last_pfn, pages; |
| 127 | |
| 128 | /* |
| 129 | * We are rounding up the start address of usable memory: |
| 130 | */ |
| 131 | curr_pfn = PFN_UP(__MEMORY_START); |
| 132 | |
| 133 | /* |
| 134 | * ... and at the end of the usable range downwards: |
| 135 | */ |
| 136 | last_pfn = PFN_DOWN(__pa(memory_end)); |
| 137 | |
| 138 | if (last_pfn > max_low_pfn) |
| 139 | last_pfn = max_low_pfn; |
| 140 | |
| 141 | pages = last_pfn - curr_pfn; |
| 142 | free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); |
| 143 | } |
| 144 | |
Bernhard Walle | 7d7712a | 2007-10-18 23:41:02 -0700 | [diff] [blame] | 145 | #ifdef CONFIG_KEXEC |
| 146 | static void __init reserve_crashkernel(void) |
| 147 | { |
| 148 | unsigned long long free_mem; |
| 149 | unsigned long long crash_size, crash_base; |
Magnus Damm | 4aeaa22 | 2008-10-09 18:42:55 +0900 | [diff] [blame] | 150 | void *vp; |
Bernhard Walle | 7d7712a | 2007-10-18 23:41:02 -0700 | [diff] [blame] | 151 | int ret; |
| 152 | |
| 153 | free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT; |
| 154 | |
| 155 | ret = parse_crashkernel(boot_command_line, free_mem, |
| 156 | &crash_size, &crash_base); |
| 157 | if (ret == 0 && crash_size) { |
Bernhard Walle | 18a01a3b | 2008-02-07 00:15:19 -0800 | [diff] [blame] | 158 | if (crash_base <= 0) { |
Magnus Damm | 4aeaa22 | 2008-10-09 18:42:55 +0900 | [diff] [blame] | 159 | vp = alloc_bootmem_nopanic(crash_size); |
| 160 | if (!vp) { |
| 161 | printk(KERN_INFO "crashkernel allocation " |
| 162 | "failed\n"); |
| 163 | return; |
| 164 | } |
| 165 | crash_base = __pa(vp); |
| 166 | } else if (reserve_bootmem(crash_base, crash_size, |
Bernhard Walle | 18a01a3b | 2008-02-07 00:15:19 -0800 | [diff] [blame] | 167 | BOOTMEM_EXCLUSIVE) < 0) { |
| 168 | printk(KERN_INFO "crashkernel reservation failed - " |
| 169 | "memory is in use\n"); |
| 170 | return; |
| 171 | } |
| 172 | |
| 173 | printk(KERN_INFO "Reserving %ldMB of memory at %ldMB " |
| 174 | "for crashkernel (System RAM: %ldMB)\n", |
| 175 | (unsigned long)(crash_size >> 20), |
| 176 | (unsigned long)(crash_base >> 20), |
| 177 | (unsigned long)(free_mem >> 20)); |
| 178 | crashk_res.start = crash_base; |
| 179 | crashk_res.end = crash_base + crash_size - 1; |
Magnus Damm | 34894c7 | 2008-08-27 18:15:43 +0900 | [diff] [blame] | 180 | insert_resource(&iomem_resource, &crashk_res); |
Bernhard Walle | 7d7712a | 2007-10-18 23:41:02 -0700 | [diff] [blame] | 181 | } |
| 182 | } |
| 183 | #else |
| 184 | static inline void __init reserve_crashkernel(void) |
| 185 | {} |
| 186 | #endif |
| 187 | |
Paul Mundt | cf204fa | 2008-09-08 20:47:42 +0900 | [diff] [blame] | 188 | #ifndef CONFIG_GENERIC_CALIBRATE_DELAY |
| 189 | void __cpuinit calibrate_delay(void) |
| 190 | { |
| 191 | struct clk *clk = clk_get(NULL, "cpu_clk"); |
| 192 | |
| 193 | if (IS_ERR(clk)) |
| 194 | panic("Need a sane CPU clock definition!"); |
| 195 | |
| 196 | loops_per_jiffy = (clk_get_rate(clk) >> 1) / HZ; |
| 197 | |
| 198 | printk(KERN_INFO "Calibrating delay loop (skipped)... " |
| 199 | "%lu.%02lu BogoMIPS PRESET (lpj=%lu)\n", |
| 200 | loops_per_jiffy/(500000/HZ), |
| 201 | (loops_per_jiffy/(5000/HZ)) % 100, |
| 202 | loops_per_jiffy); |
| 203 | } |
| 204 | #endif |
| 205 | |
Magnus Damm | 0146ba7 | 2008-04-23 20:56:44 +0900 | [diff] [blame] | 206 | void __init __add_active_range(unsigned int nid, unsigned long start_pfn, |
| 207 | unsigned long end_pfn) |
| 208 | { |
| 209 | struct resource *res = &mem_resources[nid]; |
| 210 | |
| 211 | WARN_ON(res->name); /* max one active range per node for now */ |
| 212 | |
| 213 | res->name = "System RAM"; |
| 214 | res->start = start_pfn << PAGE_SHIFT; |
| 215 | res->end = (end_pfn << PAGE_SHIFT) - 1; |
| 216 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 217 | if (request_resource(&iomem_resource, res)) { |
| 218 | pr_err("unable to request memory_resource 0x%lx 0x%lx\n", |
| 219 | start_pfn, end_pfn); |
| 220 | return; |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * We don't know which RAM region contains kernel data, |
| 225 | * so we try it repeatedly and let the resource manager |
| 226 | * test it. |
| 227 | */ |
| 228 | request_resource(res, &code_resource); |
| 229 | request_resource(res, &data_resource); |
| 230 | request_resource(res, &bss_resource); |
| 231 | |
Magnus Damm | 0146ba7 | 2008-04-23 20:56:44 +0900 | [diff] [blame] | 232 | add_active_range(nid, start_pfn, end_pfn); |
| 233 | } |
| 234 | |
Paul Mundt | 2826fa6 | 2007-06-01 17:04:36 +0900 | [diff] [blame] | 235 | void __init setup_bootmem_allocator(unsigned long free_pfn) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | { |
| 237 | unsigned long bootmap_size; |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 238 | |
| 239 | /* |
| 240 | * Find a proper area for the bootmem bitmap. After this |
| 241 | * bootstrap step all allocations (until the page allocator |
| 242 | * is intact) must be done via bootmem_alloc(). |
| 243 | */ |
Paul Mundt | 2826fa6 | 2007-06-01 17:04:36 +0900 | [diff] [blame] | 244 | bootmap_size = init_bootmem_node(NODE_DATA(0), free_pfn, |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 245 | min_low_pfn, max_low_pfn); |
| 246 | |
Magnus Damm | 0146ba7 | 2008-04-23 20:56:44 +0900 | [diff] [blame] | 247 | __add_active_range(0, min_low_pfn, max_low_pfn); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 248 | register_bootmem_low_pages(); |
| 249 | |
| 250 | node_set_online(0); |
| 251 | |
| 252 | /* |
| 253 | * Reserve the kernel text and |
| 254 | * Reserve the bootmem bitmap. We do this in two steps (first step |
| 255 | * was init_bootmem()), because this catches the (definitely buggy) |
| 256 | * case of us accidentally initializing the bootmem allocator with |
| 257 | * an invalid RAM area. |
| 258 | */ |
Stuart Menefy | f040dda | 2008-09-05 16:29:40 +0900 | [diff] [blame] | 259 | reserve_bootmem(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET, |
| 260 | (PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) - |
| 261 | (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET), |
| 262 | BOOTMEM_DEFAULT); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 263 | |
| 264 | /* |
| 265 | * reserve physical page 0 - it's a special BIOS page on many boxes, |
| 266 | * enabling clean reboots, SMP operation, laptop functions. |
| 267 | */ |
Stuart Menefy | f040dda | 2008-09-05 16:29:40 +0900 | [diff] [blame] | 268 | reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET, |
| 269 | BOOTMEM_DEFAULT); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 270 | |
Paul Mundt | 2826fa6 | 2007-06-01 17:04:36 +0900 | [diff] [blame] | 271 | sparse_memory_present_with_active_regions(0); |
| 272 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 273 | #ifdef CONFIG_BLK_DEV_INITRD |
Paul Mundt | 3f9654f | 2007-10-30 17:25:29 +0900 | [diff] [blame] | 274 | ROOT_DEV = Root_RAM0; |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 275 | |
| 276 | if (LOADER_TYPE && INITRD_START) { |
Stuart Menefy | 28d6e52 | 2008-09-05 16:14:17 +0900 | [diff] [blame] | 277 | unsigned long initrd_start_phys = INITRD_START + __MEMORY_START; |
| 278 | |
| 279 | if (initrd_start_phys + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) { |
| 280 | reserve_bootmem(initrd_start_phys, INITRD_SIZE, |
| 281 | BOOTMEM_DEFAULT); |
| 282 | initrd_start = (unsigned long)__va(initrd_start_phys); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 283 | initrd_end = initrd_start + INITRD_SIZE; |
| 284 | } else { |
| 285 | printk("initrd extends beyond end of memory " |
Stuart Menefy | 28d6e52 | 2008-09-05 16:14:17 +0900 | [diff] [blame] | 286 | "(0x%08lx > 0x%08lx)\ndisabling initrd\n", |
| 287 | initrd_start_phys + INITRD_SIZE, |
Paul Mundt | 9a19eb2 | 2008-10-20 11:37:58 +0900 | [diff] [blame] | 288 | (unsigned long)PFN_PHYS(max_low_pfn)); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 289 | initrd_start = 0; |
| 290 | } |
| 291 | } |
| 292 | #endif |
Bernhard Walle | 7d7712a | 2007-10-18 23:41:02 -0700 | [diff] [blame] | 293 | |
| 294 | reserve_crashkernel(); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | #ifndef CONFIG_NEED_MULTIPLE_NODES |
| 298 | static void __init setup_memory(void) |
| 299 | { |
| 300 | unsigned long start_pfn; |
| 301 | |
| 302 | /* |
| 303 | * Partially used pages are not usable - thus |
| 304 | * we are rounding upwards: |
| 305 | */ |
| 306 | start_pfn = PFN_UP(__pa(_end)); |
| 307 | setup_bootmem_allocator(start_pfn); |
| 308 | } |
| 309 | #else |
| 310 | extern void __init setup_memory(void); |
| 311 | #endif |
| 312 | |
Simon Horman | daf423d | 2008-07-30 10:29:39 +1000 | [diff] [blame] | 313 | /* |
| 314 | * Note: elfcorehdr_addr is not just limited to vmcore. It is also used by |
| 315 | * is_kdump_kernel() to determine if we are booting after a panic. Hence |
| 316 | * ifdef it under CONFIG_CRASH_DUMP and not CONFIG_PROC_VMCORE. |
| 317 | */ |
| 318 | #ifdef CONFIG_CRASH_DUMP |
| 319 | /* elfcorehdr= specifies the location of elf core header |
| 320 | * stored by the crashed kernel. |
| 321 | */ |
| 322 | static int __init parse_elfcorehdr(char *arg) |
| 323 | { |
| 324 | if (!arg) |
| 325 | return -EINVAL; |
| 326 | elfcorehdr_addr = memparse(arg, &arg); |
| 327 | return 0; |
| 328 | } |
| 329 | early_param("elfcorehdr", parse_elfcorehdr); |
| 330 | #endif |
| 331 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 332 | void __init setup_arch(char **cmdline_p) |
| 333 | { |
| 334 | enable_mmu(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); |
| 337 | |
Paul Mundt | 0105346 | 2008-05-13 17:40:17 +0900 | [diff] [blame] | 338 | printk(KERN_NOTICE "Boot params:\n" |
| 339 | "... MOUNT_ROOT_RDONLY - %08lx\n" |
| 340 | "... RAMDISK_FLAGS - %08lx\n" |
| 341 | "... ORIG_ROOT_DEV - %08lx\n" |
| 342 | "... LOADER_TYPE - %08lx\n" |
| 343 | "... INITRD_START - %08lx\n" |
| 344 | "... INITRD_SIZE - %08lx\n", |
| 345 | MOUNT_ROOT_RDONLY, RAMDISK_FLAGS, |
| 346 | ORIG_ROOT_DEV, LOADER_TYPE, |
| 347 | INITRD_START, INITRD_SIZE); |
| 348 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | #ifdef CONFIG_BLK_DEV_RAM |
| 350 | rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; |
| 351 | rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); |
| 352 | rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); |
| 353 | #endif |
| 354 | |
| 355 | if (!MOUNT_ROOT_RDONLY) |
| 356 | root_mountflags &= ~MS_RDONLY; |
| 357 | init_mm.start_code = (unsigned long) _text; |
| 358 | init_mm.end_code = (unsigned long) _etext; |
| 359 | init_mm.end_data = (unsigned long) _edata; |
| 360 | init_mm.brk = (unsigned long) _end; |
| 361 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 362 | code_resource.start = virt_to_phys(_text); |
| 363 | code_resource.end = virt_to_phys(_etext)-1; |
| 364 | data_resource.start = virt_to_phys(_etext); |
| 365 | data_resource.end = virt_to_phys(_edata)-1; |
Magnus Damm | 3d83984 | 2008-04-23 20:50:27 +0900 | [diff] [blame] | 366 | bss_resource.start = virt_to_phys(__bss_start); |
| 367 | bss_resource.end = virt_to_phys(_ebss)-1; |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 368 | |
Stuart Menefy | d02b08f | 2007-11-30 17:52:53 +0900 | [diff] [blame] | 369 | memory_start = (unsigned long)__va(__MEMORY_START); |
Paul Mundt | 7e5186e | 2007-10-30 17:18:08 +0900 | [diff] [blame] | 370 | if (!memory_end) |
| 371 | memory_end = memory_start + __MEMORY_SIZE; |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 372 | |
Paul Mundt | ba36197c | 2007-05-14 17:48:00 +0900 | [diff] [blame] | 373 | #ifdef CONFIG_CMDLINE_BOOL |
| 374 | strlcpy(command_line, CONFIG_CMDLINE, sizeof(command_line)); |
| 375 | #else |
| 376 | strlcpy(command_line, COMMAND_LINE, sizeof(command_line)); |
| 377 | #endif |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 378 | |
Paul Mundt | ba36197c | 2007-05-14 17:48:00 +0900 | [diff] [blame] | 379 | /* Save unparsed command line copy for /proc/cmdline */ |
| 380 | memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE); |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 381 | *cmdline_p = command_line; |
| 382 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 383 | parse_early_param(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
Paul Mundt | 9655ad0 | 2007-05-14 15:59:09 +0900 | [diff] [blame] | 385 | sh_mv_setup(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | /* |
| 388 | * Find the highest page frame number we have available |
| 389 | */ |
| 390 | max_pfn = PFN_DOWN(__pa(memory_end)); |
| 391 | |
| 392 | /* |
| 393 | * Determine low and high memory ranges: |
| 394 | */ |
| 395 | max_low_pfn = max_pfn; |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 396 | min_low_pfn = __MEMORY_START >> PAGE_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 398 | nodes_clear(node_online_map); |
Paul Mundt | dfbb904 | 2007-05-23 17:48:36 +0900 | [diff] [blame] | 399 | |
| 400 | /* Setup bootmem with available RAM */ |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 401 | setup_memory(); |
Paul Mundt | 0106662 | 2007-03-28 16:38:13 +0900 | [diff] [blame] | 402 | sparse_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | |
| 404 | #ifdef CONFIG_DUMMY_CONSOLE |
| 405 | conswitchp = &dummy_con; |
| 406 | #endif |
| 407 | |
| 408 | /* Perform the machine specific initialisation */ |
Paul Mundt | 2c7834a | 2006-09-27 18:17:31 +0900 | [diff] [blame] | 409 | if (likely(sh_mv.mv_setup)) |
| 410 | sh_mv.mv_setup(cmdline_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | |
Paul Mundt | dfbb904 | 2007-05-23 17:48:36 +0900 | [diff] [blame] | 412 | paging_init(); |
Paul Mundt | 0016a12 | 2007-09-21 18:39:49 +0900 | [diff] [blame] | 413 | |
| 414 | #ifdef CONFIG_SMP |
| 415 | plat_smp_setup(); |
| 416 | #endif |
Paul Mundt | dfbb904 | 2007-05-23 17:48:36 +0900 | [diff] [blame] | 417 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | static const char *cpu_name[] = { |
Peter Griffin | 2825999 | 2008-11-28 22:48:20 +0900 | [diff] [blame] | 420 | [CPU_SH7201] = "SH7201", |
Paul Mundt | a8f67f4 | 2007-11-26 19:54:02 +0900 | [diff] [blame] | 421 | [CPU_SH7203] = "SH7203", [CPU_SH7263] = "SH7263", |
Paul Mundt | b552c7e | 2006-11-20 14:14:29 +0900 | [diff] [blame] | 422 | [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619", |
Paul Mundt | e5723e0 | 2006-09-27 17:38:11 +0900 | [diff] [blame] | 423 | [CPU_SH7705] = "SH7705", [CPU_SH7706] = "SH7706", |
| 424 | [CPU_SH7707] = "SH7707", [CPU_SH7708] = "SH7708", |
| 425 | [CPU_SH7709] = "SH7709", [CPU_SH7710] = "SH7710", |
Markus Brunner | 3ea6bc3 | 2007-08-20 08:59:33 +0900 | [diff] [blame] | 426 | [CPU_SH7712] = "SH7712", [CPU_SH7720] = "SH7720", |
Yoshihiro Shimoda | 31a49c4 | 2007-12-26 11:45:06 +0900 | [diff] [blame] | 427 | [CPU_SH7721] = "SH7721", [CPU_SH7729] = "SH7729", |
| 428 | [CPU_SH7750] = "SH7750", [CPU_SH7750S] = "SH7750S", |
| 429 | [CPU_SH7750R] = "SH7750R", [CPU_SH7751] = "SH7751", |
| 430 | [CPU_SH7751R] = "SH7751R", [CPU_SH7760] = "SH7760", |
Paul Mundt | e5723e0 | 2006-09-27 17:38:11 +0900 | [diff] [blame] | 431 | [CPU_SH4_202] = "SH4-202", [CPU_SH4_501] = "SH4-501", |
Yoshihiro Shimoda | 7d740a0 | 2008-01-07 14:40:07 +0900 | [diff] [blame] | 432 | [CPU_SH7763] = "SH7763", [CPU_SH7770] = "SH7770", |
| 433 | [CPU_SH7780] = "SH7780", [CPU_SH7781] = "SH7781", |
| 434 | [CPU_SH7343] = "SH7343", [CPU_SH7785] = "SH7785", |
| 435 | [CPU_SH7722] = "SH7722", [CPU_SHX3] = "SH-X3", |
Paul Mundt | c2672f6 | 2007-11-20 18:29:00 +0900 | [diff] [blame] | 436 | [CPU_SH5_101] = "SH5-101", [CPU_SH5_103] = "SH5-103", |
Paul Mundt | 178dd0c | 2008-04-09 17:56:18 +0900 | [diff] [blame] | 437 | [CPU_MXG] = "MX-G", [CPU_SH7723] = "SH7723", |
Magnus Damm | 9109a30 | 2008-02-08 17:31:24 +0900 | [diff] [blame] | 438 | [CPU_SH7366] = "SH7366", [CPU_SH_NONE] = "Unknown" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | }; |
| 440 | |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 441 | const char *get_cpu_subtype(struct sh_cpuinfo *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | { |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 443 | return cpu_name[c->type]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | } |
Adrian Bunk | b19a33c | 2008-06-18 01:30:24 +0300 | [diff] [blame] | 445 | EXPORT_SYMBOL(get_cpu_subtype); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | |
| 447 | #ifdef CONFIG_PROC_FS |
Paul Mundt | 2220d16 | 2006-09-27 18:24:28 +0900 | [diff] [blame] | 448 | /* Symbolic CPU flags, keep in sync with asm/cpu-features.h */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | static const char *cpu_flags[] = { |
Paul Mundt | 2220d16 | 2006-09-27 18:24:28 +0900 | [diff] [blame] | 450 | "none", "fpu", "p2flush", "mmuassoc", "dsp", "perfctr", |
Paul Mundt | 074f98d | 2007-05-08 15:45:33 +0900 | [diff] [blame] | 451 | "ptea", "llsc", "l2", "op32", NULL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 452 | }; |
| 453 | |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 454 | static void show_cpuflags(struct seq_file *m, struct sh_cpuinfo *c) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 455 | { |
| 456 | unsigned long i; |
| 457 | |
| 458 | seq_printf(m, "cpu flags\t:"); |
| 459 | |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 460 | if (!c->flags) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | seq_printf(m, " %s\n", cpu_flags[0]); |
| 462 | return; |
| 463 | } |
| 464 | |
Paul Mundt | de02797 | 2006-02-01 03:06:02 -0800 | [diff] [blame] | 465 | for (i = 0; cpu_flags[i]; i++) |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 466 | if ((c->flags & (1 << i))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | seq_printf(m, " %s", cpu_flags[i+1]); |
| 468 | |
| 469 | seq_printf(m, "\n"); |
| 470 | } |
| 471 | |
Paul Mundt | 2c7834a | 2006-09-27 18:17:31 +0900 | [diff] [blame] | 472 | static void show_cacheinfo(struct seq_file *m, const char *type, |
| 473 | struct cache_info info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 474 | { |
| 475 | unsigned int cache_size; |
| 476 | |
| 477 | cache_size = info.ways * info.sets * info.linesz; |
| 478 | |
Paul Mundt | de02797 | 2006-02-01 03:06:02 -0800 | [diff] [blame] | 479 | seq_printf(m, "%s size\t: %2dKiB (%d-way)\n", |
| 480 | type, cache_size >> 10, info.ways); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | /* |
| 484 | * Get CPU information for use by the procfs. |
| 485 | */ |
| 486 | static int show_cpuinfo(struct seq_file *m, void *v) |
| 487 | { |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 488 | struct sh_cpuinfo *c = v; |
| 489 | unsigned int cpu = c - cpu_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 491 | if (!cpu_online(cpu)) |
| 492 | return 0; |
| 493 | |
| 494 | if (cpu == 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | seq_printf(m, "machine\t\t: %s\n", get_system_type()); |
| 496 | |
| 497 | seq_printf(m, "processor\t: %d\n", cpu); |
Serge E. Hallyn | 96b644b | 2006-10-02 02:18:13 -0700 | [diff] [blame] | 498 | seq_printf(m, "cpu family\t: %s\n", init_utsname()->machine); |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 499 | seq_printf(m, "cpu type\t: %s\n", get_cpu_subtype(c)); |
Stuart Menefy | 3611ee7 | 2008-07-02 15:15:09 +0900 | [diff] [blame] | 500 | if (c->cut_major == -1) |
| 501 | seq_printf(m, "cut\t\t: unknown\n"); |
| 502 | else if (c->cut_minor == -1) |
| 503 | seq_printf(m, "cut\t\t: %d.x\n", c->cut_major); |
| 504 | else |
| 505 | seq_printf(m, "cut\t\t: %d.%d\n", c->cut_major, c->cut_minor); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 507 | show_cpuflags(m, c); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 508 | |
| 509 | seq_printf(m, "cache type\t: "); |
| 510 | |
| 511 | /* |
| 512 | * Check for what type of cache we have, we support both the |
| 513 | * unified cache on the SH-2 and SH-3, as well as the harvard |
| 514 | * style cache on the SH-4. |
| 515 | */ |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 516 | if (c->icache.flags & SH_CACHE_COMBINED) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | seq_printf(m, "unified\n"); |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 518 | show_cacheinfo(m, "cache", c->icache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | } else { |
| 520 | seq_printf(m, "split (harvard)\n"); |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 521 | show_cacheinfo(m, "icache", c->icache); |
| 522 | show_cacheinfo(m, "dcache", c->dcache); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | } |
| 524 | |
Paul Mundt | 72c3554 | 2006-09-27 18:27:43 +0900 | [diff] [blame] | 525 | /* Optional secondary cache */ |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 526 | if (c->flags & CPU_HAS_L2_CACHE) |
| 527 | show_cacheinfo(m, "scache", c->scache); |
Paul Mundt | 72c3554 | 2006-09-27 18:27:43 +0900 | [diff] [blame] | 528 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 529 | seq_printf(m, "bogomips\t: %lu.%02lu\n", |
Paul Mundt | 11c1965 | 2006-12-25 10:19:56 +0900 | [diff] [blame] | 530 | c->loops_per_jiffy/(500000/HZ), |
| 531 | (c->loops_per_jiffy/(5000/HZ)) % 100); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
Paul Mundt | db62e5b | 2007-04-26 12:17:20 +0900 | [diff] [blame] | 533 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | } |
| 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | static void *c_start(struct seq_file *m, loff_t *pos) |
| 537 | { |
| 538 | return *pos < NR_CPUS ? cpu_data + *pos : NULL; |
| 539 | } |
| 540 | static void *c_next(struct seq_file *m, void *v, loff_t *pos) |
| 541 | { |
| 542 | ++*pos; |
| 543 | return c_start(m, pos); |
| 544 | } |
| 545 | static void c_stop(struct seq_file *m, void *v) |
| 546 | { |
| 547 | } |
Jan Engelhardt | 773c7bd | 2008-01-23 12:47:48 +0900 | [diff] [blame] | 548 | const struct seq_operations cpuinfo_op = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | .start = c_start, |
| 550 | .next = c_next, |
| 551 | .stop = c_stop, |
| 552 | .show = show_cpuinfo, |
| 553 | }; |
| 554 | #endif /* CONFIG_PROC_FS */ |
Paul Mundt | b9e393c | 2008-03-07 17:19:58 +0900 | [diff] [blame] | 555 | |
| 556 | struct dentry *sh_debugfs_root; |
| 557 | |
| 558 | static int __init sh_debugfs_init(void) |
| 559 | { |
| 560 | sh_debugfs_root = debugfs_create_dir("sh", NULL); |
Zhaolei | 9986b31 | 2008-10-17 19:25:03 +0800 | [diff] [blame] | 561 | if (!sh_debugfs_root) |
| 562 | return -ENOMEM; |
Paul Mundt | b9e393c | 2008-03-07 17:19:58 +0900 | [diff] [blame] | 563 | if (IS_ERR(sh_debugfs_root)) |
| 564 | return PTR_ERR(sh_debugfs_root); |
| 565 | |
| 566 | return 0; |
| 567 | } |
| 568 | arch_initcall(sh_debugfs_init); |