Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * This file is subject to the terms and conditions of the GNU General Public |
| 3 | * License. See the file "COPYING" in the main directory of this archive |
| 4 | * for more details. |
| 5 | * |
| 6 | * Copyright (C) 1995 Linus Torvalds |
| 7 | * Copyright (C) 1995 Waldorf Electronics |
| 8 | * Copyright (C) 1994, 95, 96, 97, 98, 99, 2000, 01, 02, 03 Ralf Baechle |
| 9 | * Copyright (C) 1996 Stoned Elipot |
| 10 | * Copyright (C) 1999 Silicon Graphics, Inc. |
| 11 | * Copyright (C) 2000 2001, 2002 Maciej W. Rozycki |
| 12 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | #include <linux/errno.h> |
| 14 | #include <linux/init.h> |
| 15 | #include <linux/ioport.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/kernel.h> |
| 18 | #include <linux/mm.h> |
| 19 | #include <linux/module.h> |
| 20 | #include <linux/stddef.h> |
| 21 | #include <linux/string.h> |
| 22 | #include <linux/unistd.h> |
| 23 | #include <linux/slab.h> |
| 24 | #include <linux/user.h> |
| 25 | #include <linux/utsname.h> |
| 26 | #include <linux/a.out.h> |
Jon Smirl | 894673e | 2006-07-10 04:44:13 -0700 | [diff] [blame] | 27 | #include <linux/screen_info.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include <linux/bootmem.h> |
| 29 | #include <linux/initrd.h> |
| 30 | #include <linux/major.h> |
| 31 | #include <linux/kdev_t.h> |
| 32 | #include <linux/root_dev.h> |
| 33 | #include <linux/highmem.h> |
| 34 | #include <linux/console.h> |
Yoichi Yuasa | b4819b5 | 2005-06-25 14:54:31 -0700 | [diff] [blame] | 35 | #include <linux/mmzone.h> |
Dave Hansen | 22a9835 | 2006-03-27 01:16:04 -0800 | [diff] [blame] | 36 | #include <linux/pfn.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | #include <asm/addrspace.h> |
| 39 | #include <asm/bootinfo.h> |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 40 | #include <asm/cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #include <asm/cpu.h> |
| 42 | #include <asm/sections.h> |
| 43 | #include <asm/setup.h> |
| 44 | #include <asm/system.h> |
| 45 | |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 46 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | EXPORT_SYMBOL(cpu_data); |
| 49 | |
| 50 | #ifdef CONFIG_VT |
| 51 | struct screen_info screen_info; |
| 52 | #endif |
| 53 | |
| 54 | /* |
| 55 | * Despite it's name this variable is even if we don't have PCI |
| 56 | */ |
| 57 | unsigned int PCI_DMA_BUS_IS_PHYS; |
| 58 | |
| 59 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); |
| 60 | |
| 61 | /* |
| 62 | * Setup information |
| 63 | * |
| 64 | * These are initialized so they are in the .data section |
| 65 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 66 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
| 67 | unsigned long mips_machgroup __read_mostly = MACH_GROUP_UNKNOWN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | EXPORT_SYMBOL(mips_machtype); |
| 70 | EXPORT_SYMBOL(mips_machgroup); |
| 71 | |
| 72 | struct boot_mem_map boot_mem_map; |
| 73 | |
| 74 | static char command_line[CL_SIZE]; |
| 75 | char arcs_cmdline[CL_SIZE]=CONFIG_CMDLINE; |
| 76 | |
| 77 | /* |
| 78 | * mips_io_port_base is the begin of the address space to which x86 style |
| 79 | * I/O ports are mapped. |
| 80 | */ |
Ralf Baechle | ec74e36 | 2005-07-13 11:48:45 +0000 | [diff] [blame] | 81 | const unsigned long mips_io_port_base __read_mostly = -1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | EXPORT_SYMBOL(mips_io_port_base); |
| 83 | |
| 84 | /* |
| 85 | * isa_slot_offset is the address where E(ISA) busaddress 0 is mapped |
| 86 | * for the processor. |
| 87 | */ |
| 88 | unsigned long isa_slot_offset; |
| 89 | EXPORT_SYMBOL(isa_slot_offset); |
| 90 | |
| 91 | static struct resource code_resource = { .name = "Kernel code", }; |
| 92 | static struct resource data_resource = { .name = "Kernel data", }; |
| 93 | |
| 94 | void __init add_memory_region(phys_t start, phys_t size, long type) |
| 95 | { |
| 96 | int x = boot_mem_map.nr_map; |
| 97 | struct boot_mem_map_entry *prev = boot_mem_map.map + x - 1; |
| 98 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 99 | /* Sanity check */ |
| 100 | if (start + size < start) { |
| 101 | printk("Trying to add an invalid memory region, skipped\n"); |
| 102 | return; |
| 103 | } |
| 104 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | /* |
| 106 | * Try to merge with previous entry if any. This is far less than |
| 107 | * perfect but is sufficient for most real world cases. |
| 108 | */ |
| 109 | if (x && prev->addr + prev->size == start && prev->type == type) { |
| 110 | prev->size += size; |
| 111 | return; |
| 112 | } |
| 113 | |
| 114 | if (x == BOOT_MEM_MAP_MAX) { |
| 115 | printk("Ooops! Too many entries in the memory map!\n"); |
| 116 | return; |
| 117 | } |
| 118 | |
| 119 | boot_mem_map.map[x].addr = start; |
| 120 | boot_mem_map.map[x].size = size; |
| 121 | boot_mem_map.map[x].type = type; |
| 122 | boot_mem_map.nr_map++; |
| 123 | } |
| 124 | |
| 125 | static void __init print_memory_map(void) |
| 126 | { |
| 127 | int i; |
| 128 | const int field = 2 * sizeof(unsigned long); |
| 129 | |
| 130 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 131 | printk(" memory: %0*Lx @ %0*Lx ", |
| 132 | field, (unsigned long long) boot_mem_map.map[i].size, |
| 133 | field, (unsigned long long) boot_mem_map.map[i].addr); |
| 134 | |
| 135 | switch (boot_mem_map.map[i].type) { |
| 136 | case BOOT_MEM_RAM: |
| 137 | printk("(usable)\n"); |
| 138 | break; |
| 139 | case BOOT_MEM_ROM_DATA: |
| 140 | printk("(ROM data)\n"); |
| 141 | break; |
| 142 | case BOOT_MEM_RESERVED: |
| 143 | printk("(reserved)\n"); |
| 144 | break; |
| 145 | default: |
| 146 | printk("type %lu\n", boot_mem_map.map[i].type); |
| 147 | break; |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | static inline void parse_cmdline_early(void) |
| 153 | { |
| 154 | char c = ' ', *to = command_line, *from = saved_command_line; |
| 155 | unsigned long start_at, mem_size; |
| 156 | int len = 0; |
| 157 | int usermem = 0; |
| 158 | |
| 159 | printk("Determined physical RAM map:\n"); |
| 160 | print_memory_map(); |
| 161 | |
| 162 | for (;;) { |
| 163 | /* |
| 164 | * "mem=XXX[kKmM]" defines a memory region from |
| 165 | * 0 to <XXX>, overriding the determined size. |
| 166 | * "mem=XXX[KkmM]@YYY[KkmM]" defines a memory region from |
| 167 | * <YYY> to <YYY>+<XXX>, overriding the determined size. |
| 168 | */ |
| 169 | if (c == ' ' && !memcmp(from, "mem=", 4)) { |
| 170 | if (to != command_line) |
| 171 | to--; |
| 172 | /* |
| 173 | * If a user specifies memory size, we |
| 174 | * blow away any automatically generated |
| 175 | * size. |
| 176 | */ |
| 177 | if (usermem == 0) { |
| 178 | boot_mem_map.nr_map = 0; |
| 179 | usermem = 1; |
| 180 | } |
| 181 | mem_size = memparse(from + 4, &from); |
| 182 | if (*from == '@') |
| 183 | start_at = memparse(from + 1, &from); |
| 184 | else |
| 185 | start_at = 0; |
| 186 | add_memory_region(start_at, mem_size, BOOT_MEM_RAM); |
| 187 | } |
| 188 | c = *(from++); |
| 189 | if (!c) |
| 190 | break; |
| 191 | if (CL_SIZE <= ++len) |
| 192 | break; |
| 193 | *(to++) = c; |
| 194 | } |
| 195 | *to = '\0'; |
| 196 | |
| 197 | if (usermem) { |
| 198 | printk("User-defined physical RAM map:\n"); |
| 199 | print_memory_map(); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | static inline int parse_rd_cmdline(unsigned long* rd_start, unsigned long* rd_end) |
| 204 | { |
| 205 | /* |
| 206 | * "rd_start=0xNNNNNNNN" defines the memory address of an initrd |
| 207 | * "rd_size=0xNN" it's size |
| 208 | */ |
| 209 | unsigned long start = 0; |
| 210 | unsigned long size = 0; |
| 211 | unsigned long end; |
| 212 | char cmd_line[CL_SIZE]; |
| 213 | char *start_str; |
| 214 | char *size_str; |
| 215 | char *tmp; |
| 216 | |
| 217 | strcpy(cmd_line, command_line); |
| 218 | *command_line = 0; |
| 219 | tmp = cmd_line; |
| 220 | /* Ignore "rd_start=" strings in other parameters. */ |
| 221 | start_str = strstr(cmd_line, "rd_start="); |
| 222 | if (start_str && start_str != cmd_line && *(start_str - 1) != ' ') |
| 223 | start_str = strstr(start_str, " rd_start="); |
| 224 | while (start_str) { |
| 225 | if (start_str != cmd_line) |
| 226 | strncat(command_line, tmp, start_str - tmp); |
| 227 | start = memparse(start_str + 9, &start_str); |
| 228 | tmp = start_str + 1; |
| 229 | start_str = strstr(start_str, " rd_start="); |
| 230 | } |
| 231 | if (*tmp) |
| 232 | strcat(command_line, tmp); |
| 233 | |
| 234 | strcpy(cmd_line, command_line); |
| 235 | *command_line = 0; |
| 236 | tmp = cmd_line; |
| 237 | /* Ignore "rd_size" strings in other parameters. */ |
| 238 | size_str = strstr(cmd_line, "rd_size="); |
| 239 | if (size_str && size_str != cmd_line && *(size_str - 1) != ' ') |
| 240 | size_str = strstr(size_str, " rd_size="); |
| 241 | while (size_str) { |
| 242 | if (size_str != cmd_line) |
| 243 | strncat(command_line, tmp, size_str - tmp); |
| 244 | size = memparse(size_str + 8, &size_str); |
| 245 | tmp = size_str + 1; |
| 246 | size_str = strstr(size_str, " rd_size="); |
| 247 | } |
| 248 | if (*tmp) |
| 249 | strcat(command_line, tmp); |
| 250 | |
Ralf Baechle | 875d43e | 2005-09-03 15:56:16 -0700 | [diff] [blame] | 251 | #ifdef CONFIG_64BIT |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | /* HACK: Guess if the sign extension was forgotten */ |
| 253 | if (start > 0x0000000080000000 && start < 0x00000000ffffffff) |
Atsushi Nemoto | 460c042 | 2006-06-01 01:00:39 +0900 | [diff] [blame] | 254 | start |= 0xffffffff00000000UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | #endif |
| 256 | |
| 257 | end = start + size; |
| 258 | if (start && end) { |
| 259 | *rd_start = start; |
| 260 | *rd_end = end; |
| 261 | return 1; |
| 262 | } |
| 263 | return 0; |
| 264 | } |
| 265 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 266 | /* |
| 267 | * Initialize the bootmem allocator. It also setup initrd related data |
| 268 | * if needed. |
| 269 | */ |
| 270 | static void __init bootmem_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | unsigned long reserved_end = (unsigned long)&_end; |
| 273 | #ifndef CONFIG_SGI_IP27 |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 274 | unsigned long highest = 0; |
| 275 | unsigned long mapstart = -1UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | unsigned long bootmap_size; |
| 277 | int i; |
| 278 | #endif |
| 279 | #ifdef CONFIG_BLK_DEV_INITRD |
| 280 | int initrd_reserve_bootmem = 0; |
| 281 | |
| 282 | /* Board specific code should have set up initrd_start and initrd_end */ |
| 283 | ROOT_DEV = Root_RAM0; |
| 284 | if (parse_rd_cmdline(&initrd_start, &initrd_end)) { |
| 285 | reserved_end = max(reserved_end, initrd_end); |
| 286 | initrd_reserve_bootmem = 1; |
| 287 | } else { |
| 288 | unsigned long tmp; |
| 289 | u32 *initrd_header; |
| 290 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 291 | tmp = PAGE_ALIGN(reserved_end) - sizeof(u32) * 2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | if (tmp < reserved_end) |
| 293 | tmp += PAGE_SIZE; |
| 294 | initrd_header = (u32 *)tmp; |
| 295 | if (initrd_header[0] == 0x494E5244) { |
| 296 | initrd_start = (unsigned long)&initrd_header[2]; |
| 297 | initrd_end = initrd_start + initrd_header[1]; |
| 298 | reserved_end = max(reserved_end, initrd_end); |
| 299 | initrd_reserve_bootmem = 1; |
| 300 | } |
| 301 | } |
| 302 | #endif /* CONFIG_BLK_DEV_INITRD */ |
| 303 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | #ifndef CONFIG_SGI_IP27 |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 305 | /* |
| 306 | * reserved_end is now a pfn |
| 307 | */ |
| 308 | reserved_end = PFN_UP(CPHYSADDR(reserved_end)); |
| 309 | |
| 310 | /* |
| 311 | * Find the highest page frame number we have available. |
| 312 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 314 | unsigned long start, end; |
| 315 | |
| 316 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 317 | continue; |
| 318 | |
| 319 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 320 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 321 | + boot_mem_map.map[i].size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 323 | if (end > highest) |
| 324 | highest = end; |
| 325 | if (end <= reserved_end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 327 | if (start >= mapstart) |
| 328 | continue; |
| 329 | mapstart = max(reserved_end, start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
| 332 | /* |
| 333 | * Determine low and high memory ranges |
| 334 | */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 335 | if (highest > PFN_DOWN(HIGHMEM_START)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | #ifdef CONFIG_HIGHMEM |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 337 | highstart_pfn = PFN_DOWN(HIGHMEM_START); |
| 338 | highend_pfn = highest; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | #endif |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 340 | highest = PFN_DOWN(HIGHMEM_START); |
| 341 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 343 | /* |
| 344 | * Initialize the boot-time allocator with low memory only. |
| 345 | */ |
| 346 | bootmap_size = init_bootmem(mapstart, highest); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
| 348 | /* |
| 349 | * Register fully available low RAM pages with the bootmem allocator. |
| 350 | */ |
| 351 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 352 | unsigned long start, end, size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | |
| 354 | /* |
| 355 | * Reserve usable memory. |
| 356 | */ |
| 357 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) |
| 358 | continue; |
| 359 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 360 | start = PFN_UP(boot_mem_map.map[i].addr); |
| 361 | end = PFN_DOWN(boot_mem_map.map[i].addr |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | + boot_mem_map.map[i].size); |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 363 | /* |
| 364 | * We are rounding up the start address of usable memory |
| 365 | * and at the end of the usable range downwards. |
| 366 | */ |
| 367 | if (start >= max_low_pfn) |
| 368 | continue; |
| 369 | if (start < reserved_end) |
| 370 | start = reserved_end; |
| 371 | if (end > max_low_pfn) |
| 372 | end = max_low_pfn; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
| 374 | /* |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 375 | * ... finally, is the area going away? |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 377 | if (end <= start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | continue; |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 379 | size = end - start; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | /* Register lowmem ranges */ |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 382 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
| 383 | memory_present(0, start, end); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | } |
| 385 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 386 | /* |
| 387 | * Reserve the bootmap memory. |
| 388 | */ |
| 389 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size); |
| 390 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | #endif /* CONFIG_SGI_IP27 */ |
| 392 | |
| 393 | #ifdef CONFIG_BLK_DEV_INITRD |
| 394 | initrd_below_start_ok = 1; |
| 395 | if (initrd_start) { |
Atsushi Nemoto | ecf52d3 | 2006-06-01 01:00:03 +0900 | [diff] [blame] | 396 | unsigned long initrd_size = ((unsigned char *)initrd_end) - |
| 397 | ((unsigned char *)initrd_start); |
| 398 | const int width = sizeof(long) * 2; |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | printk("Initial ramdisk at: 0x%p (%lu bytes)\n", |
| 401 | (void *)initrd_start, initrd_size); |
| 402 | |
| 403 | if (CPHYSADDR(initrd_end) > PFN_PHYS(max_low_pfn)) { |
| 404 | printk("initrd extends beyond end of memory " |
| 405 | "(0x%0*Lx > 0x%0*Lx)\ndisabling initrd\n", |
Atsushi Nemoto | ecf52d3 | 2006-06-01 01:00:03 +0900 | [diff] [blame] | 406 | width, |
| 407 | (unsigned long long) CPHYSADDR(initrd_end), |
| 408 | width, |
| 409 | (unsigned long long) PFN_PHYS(max_low_pfn)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | initrd_start = initrd_end = 0; |
| 411 | initrd_reserve_bootmem = 0; |
| 412 | } |
| 413 | |
| 414 | if (initrd_reserve_bootmem) |
| 415 | reserve_bootmem(CPHYSADDR(initrd_start), initrd_size); |
| 416 | } |
| 417 | #endif /* CONFIG_BLK_DEV_INITRD */ |
| 418 | } |
| 419 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 420 | /* |
| 421 | * arch_mem_init - initialize memory managment subsystem |
| 422 | * |
| 423 | * o plat_mem_setup() detects the memory configuration and will record detected |
| 424 | * memory areas using add_memory_region. |
| 425 | * o parse_cmdline_early() parses the command line for mem= options which, |
| 426 | * iff detected, will override the results of the automatic detection. |
| 427 | * |
| 428 | * At this stage the memory configuration of the system is known to the |
| 429 | * kernel but generic memory managment system is still entirely uninitialized. |
| 430 | * |
| 431 | * o bootmem_init() |
| 432 | * o sparse_init() |
| 433 | * o paging_init() |
| 434 | * |
| 435 | * At this stage the bootmem allocator is ready to use. |
| 436 | * |
| 437 | * NOTE: historically plat_mem_setup did the entire platform initialization. |
| 438 | * This was rather impractical because it meant plat_mem_setup had to |
| 439 | * get away without any kind of memory allocator. To keep old code from |
| 440 | * breaking plat_setup was just renamed to plat_setup and a second platform |
| 441 | * initialization hook for anything else was introduced. |
| 442 | */ |
| 443 | |
| 444 | extern void plat_mem_setup(void); |
| 445 | |
| 446 | static void __init arch_mem_init(char **cmdline_p) |
| 447 | { |
| 448 | /* call board setup routine */ |
| 449 | plat_mem_setup(); |
| 450 | |
| 451 | strlcpy(command_line, arcs_cmdline, sizeof(command_line)); |
| 452 | strlcpy(saved_command_line, command_line, COMMAND_LINE_SIZE); |
| 453 | |
| 454 | *cmdline_p = command_line; |
| 455 | |
| 456 | parse_cmdline_early(); |
| 457 | bootmem_init(); |
| 458 | sparse_init(); |
| 459 | paging_init(); |
| 460 | } |
| 461 | |
Franck Bui-Huu | b6f1f0d | 2006-08-11 17:51:48 +0200 | [diff] [blame^] | 462 | #define MAXMEM HIGHMEM_START |
| 463 | #define MAXMEM_PFN PFN_DOWN(MAXMEM) |
| 464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | static inline void resource_init(void) |
| 466 | { |
| 467 | int i; |
| 468 | |
Ralf Baechle | 6adb5fe | 2006-06-20 12:47:53 +0100 | [diff] [blame] | 469 | if (UNCAC_BASE != IO_BASE) |
| 470 | return; |
| 471 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | code_resource.start = virt_to_phys(&_text); |
| 473 | code_resource.end = virt_to_phys(&_etext) - 1; |
| 474 | data_resource.start = virt_to_phys(&_etext); |
| 475 | data_resource.end = virt_to_phys(&_edata) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
| 477 | /* |
| 478 | * Request address space for all standard RAM. |
| 479 | */ |
| 480 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
| 481 | struct resource *res; |
| 482 | unsigned long start, end; |
| 483 | |
| 484 | start = boot_mem_map.map[i].addr; |
| 485 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; |
| 486 | if (start >= MAXMEM) |
| 487 | continue; |
| 488 | if (end >= MAXMEM) |
| 489 | end = MAXMEM - 1; |
| 490 | |
| 491 | res = alloc_bootmem(sizeof(struct resource)); |
| 492 | switch (boot_mem_map.map[i].type) { |
| 493 | case BOOT_MEM_RAM: |
| 494 | case BOOT_MEM_ROM_DATA: |
| 495 | res->name = "System RAM"; |
| 496 | break; |
| 497 | case BOOT_MEM_RESERVED: |
| 498 | default: |
| 499 | res->name = "reserved"; |
| 500 | } |
| 501 | |
| 502 | res->start = start; |
| 503 | res->end = end; |
| 504 | |
| 505 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; |
| 506 | request_resource(&iomem_resource, res); |
| 507 | |
| 508 | /* |
| 509 | * We don't know which RAM region contains kernel data, |
| 510 | * so we try it repeatedly and let the resource manager |
| 511 | * test it. |
| 512 | */ |
| 513 | request_resource(res, &code_resource); |
| 514 | request_resource(res, &data_resource); |
| 515 | } |
| 516 | } |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | #undef MAXMEM |
| 519 | #undef MAXMEM_PFN |
| 520 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | void __init setup_arch(char **cmdline_p) |
| 522 | { |
| 523 | cpu_probe(); |
| 524 | prom_init(); |
| 525 | cpu_report(); |
| 526 | |
| 527 | #if defined(CONFIG_VT) |
| 528 | #if defined(CONFIG_VGA_CONSOLE) |
| 529 | conswitchp = &vga_con; |
| 530 | #elif defined(CONFIG_DUMMY_CONSOLE) |
| 531 | conswitchp = &dummy_con; |
| 532 | #endif |
| 533 | #endif |
| 534 | |
Ralf Baechle | 2925aba | 2006-06-18 01:32:22 +0100 | [diff] [blame] | 535 | arch_mem_init(cmdline_p); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | resource_init(); |
Ralf Baechle | 9b6695a | 2006-02-23 12:23:27 +0000 | [diff] [blame] | 538 | #ifdef CONFIG_SMP |
| 539 | plat_smp_setup(); |
| 540 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | } |
| 542 | |
| 543 | int __init fpu_disable(char *s) |
| 544 | { |
Ralf Baechle | f088fc8 | 2006-04-05 09:45:47 +0100 | [diff] [blame] | 545 | int i; |
| 546 | |
| 547 | for (i = 0; i < NR_CPUS; i++) |
| 548 | cpu_data[i].options &= ~MIPS_CPU_FPU; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | |
| 550 | return 1; |
| 551 | } |
| 552 | |
| 553 | __setup("nofpu", fpu_disable); |
Ralf Baechle | e50c0a8 | 2005-05-31 11:49:19 +0000 | [diff] [blame] | 554 | |
| 555 | int __init dsp_disable(char *s) |
| 556 | { |
| 557 | cpu_data[0].ases &= ~MIPS_ASE_DSP; |
| 558 | |
| 559 | return 1; |
| 560 | } |
| 561 | |
| 562 | __setup("nodsp", dsp_disable); |