Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004-2006 Atmel Corporation |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 as |
| 6 | * published by the Free Software Foundation. |
| 7 | */ |
| 8 | |
| 9 | #include <linux/clk.h> |
| 10 | #include <linux/init.h> |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 11 | #include <linux/initrd.h> |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 12 | #include <linux/sched.h> |
| 13 | #include <linux/console.h> |
| 14 | #include <linux/ioport.h> |
| 15 | #include <linux/bootmem.h> |
| 16 | #include <linux/fs.h> |
| 17 | #include <linux/module.h> |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 18 | #include <linux/pfn.h> |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 19 | #include <linux/root_dev.h> |
| 20 | #include <linux/cpu.h> |
Ahmed S. Darwish | 10b50b7 | 2007-02-05 04:41:27 +0200 | [diff] [blame] | 21 | #include <linux/kernel.h> |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 22 | |
| 23 | #include <asm/sections.h> |
| 24 | #include <asm/processor.h> |
| 25 | #include <asm/pgtable.h> |
| 26 | #include <asm/setup.h> |
| 27 | #include <asm/sysreg.h> |
| 28 | |
Haavard Skinnemoen | 3663b73 | 2008-08-05 13:57:38 +0200 | [diff] [blame] | 29 | #include <mach/board.h> |
| 30 | #include <mach/init.h> |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 31 | |
| 32 | extern int root_mountflags; |
| 33 | |
| 34 | /* |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 35 | * Initialize loops_per_jiffy as 5000000 (500MIPS). |
| 36 | * Better make it too large than too small... |
| 37 | */ |
| 38 | struct avr32_cpuinfo boot_cpu_data = { |
| 39 | .loops_per_jiffy = 5000000 |
| 40 | }; |
| 41 | EXPORT_SYMBOL(boot_cpu_data); |
| 42 | |
Alon Bar-Lev | bf4352c | 2007-02-12 00:54:08 -0800 | [diff] [blame] | 43 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 44 | |
| 45 | /* |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 46 | * Standard memory resources |
| 47 | */ |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 48 | static struct resource __initdata kernel_data = { |
| 49 | .name = "Kernel data", |
| 50 | .start = 0, |
| 51 | .end = 0, |
| 52 | .flags = IORESOURCE_MEM, |
| 53 | }; |
| 54 | static struct resource __initdata kernel_code = { |
| 55 | .name = "Kernel code", |
| 56 | .start = 0, |
| 57 | .end = 0, |
| 58 | .flags = IORESOURCE_MEM, |
| 59 | .sibling = &kernel_data, |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 60 | }; |
| 61 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 62 | /* |
| 63 | * Available system RAM and reserved regions as singly linked |
| 64 | * lists. These lists are traversed using the sibling pointer in |
| 65 | * struct resource and are kept sorted at all times. |
| 66 | */ |
| 67 | static struct resource *__initdata system_ram; |
| 68 | static struct resource *__initdata reserved = &kernel_code; |
| 69 | |
| 70 | /* |
| 71 | * We need to allocate these before the bootmem allocator is up and |
| 72 | * running, so we need this "cache". 32 entries are probably enough |
| 73 | * for all but the most insanely complex systems. |
| 74 | */ |
| 75 | static struct resource __initdata res_cache[32]; |
| 76 | static unsigned int __initdata res_cache_next_free; |
| 77 | |
| 78 | static void __init resource_init(void) |
| 79 | { |
| 80 | struct resource *mem, *res; |
| 81 | struct resource *new; |
| 82 | |
| 83 | kernel_code.start = __pa(init_mm.start_code); |
| 84 | |
| 85 | for (mem = system_ram; mem; mem = mem->sibling) { |
| 86 | new = alloc_bootmem_low(sizeof(struct resource)); |
| 87 | memcpy(new, mem, sizeof(struct resource)); |
| 88 | |
| 89 | new->sibling = NULL; |
| 90 | if (request_resource(&iomem_resource, new)) |
| 91 | printk(KERN_WARNING "Bad RAM resource %08x-%08x\n", |
| 92 | mem->start, mem->end); |
| 93 | } |
| 94 | |
| 95 | for (res = reserved; res; res = res->sibling) { |
| 96 | new = alloc_bootmem_low(sizeof(struct resource)); |
| 97 | memcpy(new, res, sizeof(struct resource)); |
| 98 | |
| 99 | new->sibling = NULL; |
| 100 | if (insert_resource(&iomem_resource, new)) |
| 101 | printk(KERN_WARNING |
| 102 | "Bad reserved resource %s (%08x-%08x)\n", |
| 103 | res->name, res->start, res->end); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | static void __init |
| 108 | add_physical_memory(resource_size_t start, resource_size_t end) |
| 109 | { |
| 110 | struct resource *new, *next, **pprev; |
| 111 | |
| 112 | for (pprev = &system_ram, next = system_ram; next; |
| 113 | pprev = &next->sibling, next = next->sibling) { |
| 114 | if (end < next->start) |
| 115 | break; |
| 116 | if (start <= next->end) { |
| 117 | printk(KERN_WARNING |
| 118 | "Warning: Physical memory map is broken\n"); |
| 119 | printk(KERN_WARNING |
| 120 | "Warning: %08x-%08x overlaps %08x-%08x\n", |
| 121 | start, end, next->start, next->end); |
| 122 | return; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | if (res_cache_next_free >= ARRAY_SIZE(res_cache)) { |
| 127 | printk(KERN_WARNING |
| 128 | "Warning: Failed to add physical memory %08x-%08x\n", |
| 129 | start, end); |
| 130 | return; |
| 131 | } |
| 132 | |
| 133 | new = &res_cache[res_cache_next_free++]; |
| 134 | new->start = start; |
| 135 | new->end = end; |
| 136 | new->name = "System RAM"; |
| 137 | new->flags = IORESOURCE_MEM; |
| 138 | |
| 139 | *pprev = new; |
| 140 | } |
| 141 | |
| 142 | static int __init |
| 143 | add_reserved_region(resource_size_t start, resource_size_t end, |
| 144 | const char *name) |
| 145 | { |
| 146 | struct resource *new, *next, **pprev; |
| 147 | |
| 148 | if (end < start) |
| 149 | return -EINVAL; |
| 150 | |
| 151 | if (res_cache_next_free >= ARRAY_SIZE(res_cache)) |
| 152 | return -ENOMEM; |
| 153 | |
| 154 | for (pprev = &reserved, next = reserved; next; |
| 155 | pprev = &next->sibling, next = next->sibling) { |
| 156 | if (end < next->start) |
| 157 | break; |
| 158 | if (start <= next->end) |
| 159 | return -EBUSY; |
| 160 | } |
| 161 | |
| 162 | new = &res_cache[res_cache_next_free++]; |
| 163 | new->start = start; |
| 164 | new->end = end; |
| 165 | new->name = name; |
Haavard Skinnemoen | a2a3952 | 2008-03-27 15:24:12 +0100 | [diff] [blame] | 166 | new->sibling = next; |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 167 | new->flags = IORESOURCE_MEM; |
| 168 | |
| 169 | *pprev = new; |
| 170 | |
| 171 | return 0; |
| 172 | } |
| 173 | |
| 174 | static unsigned long __init |
| 175 | find_free_region(const struct resource *mem, resource_size_t size, |
| 176 | resource_size_t align) |
| 177 | { |
| 178 | struct resource *res; |
| 179 | unsigned long target; |
| 180 | |
| 181 | target = ALIGN(mem->start, align); |
| 182 | for (res = reserved; res; res = res->sibling) { |
| 183 | if ((target + size) <= res->start) |
| 184 | break; |
| 185 | if (target <= res->end) |
| 186 | target = ALIGN(res->end + 1, align); |
| 187 | } |
| 188 | |
| 189 | if ((target + size) > (mem->end + 1)) |
| 190 | return mem->end + 1; |
| 191 | |
| 192 | return target; |
| 193 | } |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 194 | |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 195 | static int __init |
| 196 | alloc_reserved_region(resource_size_t *start, resource_size_t size, |
| 197 | resource_size_t align, const char *name) |
| 198 | { |
| 199 | struct resource *mem; |
| 200 | resource_size_t target; |
| 201 | int ret; |
| 202 | |
| 203 | for (mem = system_ram; mem; mem = mem->sibling) { |
| 204 | target = find_free_region(mem, size, align); |
| 205 | if (target <= mem->end) { |
| 206 | ret = add_reserved_region(target, target + size - 1, |
| 207 | name); |
| 208 | if (!ret) |
| 209 | *start = target; |
| 210 | return ret; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | return -ENOMEM; |
| 215 | } |
| 216 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 217 | /* |
| 218 | * Early framebuffer allocation. Works as follows: |
| 219 | * - If fbmem_size is zero, nothing will be allocated or reserved. |
| 220 | * - If fbmem_start is zero when setup_bootmem() is called, |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 221 | * a block of fbmem_size bytes will be reserved before bootmem |
| 222 | * initialization. It will be aligned to the largest page size |
| 223 | * that fbmem_size is a multiple of. |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 224 | * - If fbmem_start is nonzero, an area of size fbmem_size will be |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 225 | * reserved at the physical address fbmem_start if possible. If |
| 226 | * it collides with other reserved memory, a different block of |
| 227 | * same size will be allocated, just as if fbmem_start was zero. |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 228 | * |
| 229 | * Board-specific code may use these variables to set up platform data |
| 230 | * for the framebuffer driver if fbmem_size is nonzero. |
| 231 | */ |
Haavard Skinnemoen | d80e2bb | 2007-03-21 16:23:41 +0100 | [diff] [blame] | 232 | resource_size_t __initdata fbmem_start; |
| 233 | resource_size_t __initdata fbmem_size; |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 234 | |
| 235 | /* |
| 236 | * "fbmem=xxx[kKmM]" allocates the specified amount of boot memory for |
| 237 | * use as framebuffer. |
| 238 | * |
| 239 | * "fbmem=xxx[kKmM]@yyy[kKmM]" defines a memory region of size xxx and |
| 240 | * starting at yyy to be reserved for use as framebuffer. |
| 241 | * |
| 242 | * The kernel won't verify that the memory region starting at yyy |
| 243 | * actually contains usable RAM. |
| 244 | */ |
| 245 | static int __init early_parse_fbmem(char *p) |
| 246 | { |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 247 | int ret; |
| 248 | unsigned long align; |
| 249 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 250 | fbmem_size = memparse(p, &p); |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 251 | if (*p == '@') { |
Matteo Vit | fe57f84 | 2007-08-29 10:19:40 +0200 | [diff] [blame] | 252 | fbmem_start = memparse(p + 1, &p); |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 253 | ret = add_reserved_region(fbmem_start, |
| 254 | fbmem_start + fbmem_size - 1, |
| 255 | "Framebuffer"); |
| 256 | if (ret) { |
| 257 | printk(KERN_WARNING |
| 258 | "Failed to reserve framebuffer memory\n"); |
| 259 | fbmem_start = 0; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | if (!fbmem_start) { |
| 264 | if ((fbmem_size & 0x000fffffUL) == 0) |
| 265 | align = 0x100000; /* 1 MiB */ |
| 266 | else if ((fbmem_size & 0x0000ffffUL) == 0) |
| 267 | align = 0x10000; /* 64 KiB */ |
| 268 | else |
| 269 | align = 0x1000; /* 4 KiB */ |
| 270 | |
| 271 | ret = alloc_reserved_region(&fbmem_start, fbmem_size, |
| 272 | align, "Framebuffer"); |
| 273 | if (ret) { |
| 274 | printk(KERN_WARNING |
| 275 | "Failed to allocate framebuffer memory\n"); |
| 276 | fbmem_size = 0; |
Haavard Skinnemoen | 01d3a5e | 2008-04-28 02:15:19 -0700 | [diff] [blame] | 277 | } else { |
| 278 | memset(__va(fbmem_start), 0, fbmem_size); |
Haavard Skinnemoen | f9692b9 | 2007-03-21 16:16:50 +0100 | [diff] [blame] | 279 | } |
| 280 | } |
| 281 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 282 | return 0; |
| 283 | } |
| 284 | early_param("fbmem", early_parse_fbmem); |
| 285 | |
Marco Stornelli | 48c1fd3 | 2008-09-16 09:14:03 +0200 | [diff] [blame] | 286 | /* |
| 287 | * Pick out the memory size. We look for mem=size@start, |
| 288 | * where start and size are "size[KkMmGg]" |
| 289 | */ |
| 290 | static int __init early_mem(char *p) |
| 291 | { |
| 292 | resource_size_t size, start; |
| 293 | |
| 294 | start = system_ram->start; |
| 295 | size = memparse(p, &p); |
| 296 | if (*p == '@') |
| 297 | start = memparse(p + 1, &p); |
| 298 | |
| 299 | system_ram->start = start; |
| 300 | system_ram->end = system_ram->start + size - 1; |
| 301 | return 0; |
| 302 | } |
| 303 | early_param("mem", early_mem); |
| 304 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 305 | static int __init parse_tag_core(struct tag *tag) |
| 306 | { |
| 307 | if (tag->hdr.size > 2) { |
| 308 | if ((tag->u.core.flags & 1) == 0) |
| 309 | root_mountflags &= ~MS_RDONLY; |
| 310 | ROOT_DEV = new_decode_dev(tag->u.core.rootdev); |
| 311 | } |
| 312 | return 0; |
| 313 | } |
| 314 | __tagtable(ATAG_CORE, parse_tag_core); |
| 315 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 316 | static int __init parse_tag_mem(struct tag *tag) |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 317 | { |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 318 | unsigned long start, end; |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 319 | |
| 320 | /* |
| 321 | * Ignore zero-sized entries. If we're running standalone, the |
| 322 | * SDRAM code may emit such entries if something goes |
| 323 | * wrong... |
| 324 | */ |
| 325 | if (tag->u.mem_range.size == 0) |
| 326 | return 0; |
| 327 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 328 | start = tag->u.mem_range.addr; |
| 329 | end = tag->u.mem_range.addr + tag->u.mem_range.size - 1; |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 330 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 331 | add_physical_memory(start, end); |
| 332 | return 0; |
| 333 | } |
| 334 | __tagtable(ATAG_MEM, parse_tag_mem); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 335 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 336 | static int __init parse_tag_rdimg(struct tag *tag) |
| 337 | { |
Robert P. J. Day | f3e2698 | 2007-07-12 18:31:08 -0400 | [diff] [blame] | 338 | #ifdef CONFIG_BLK_DEV_INITRD |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 339 | struct tag_mem_range *mem = &tag->u.mem_range; |
| 340 | int ret; |
| 341 | |
| 342 | if (initrd_start) { |
| 343 | printk(KERN_WARNING |
| 344 | "Warning: Only the first initrd image will be used\n"); |
| 345 | return 0; |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 346 | } |
| 347 | |
Haavard Skinnemoen | aa15f63 | 2007-07-13 11:26:01 +0200 | [diff] [blame] | 348 | ret = add_reserved_region(mem->addr, mem->addr + mem->size - 1, |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 349 | "initrd"); |
| 350 | if (ret) { |
| 351 | printk(KERN_WARNING |
| 352 | "Warning: Failed to reserve initrd memory\n"); |
| 353 | return ret; |
| 354 | } |
| 355 | |
| 356 | initrd_start = (unsigned long)__va(mem->addr); |
| 357 | initrd_end = initrd_start + mem->size; |
| 358 | #else |
| 359 | printk(KERN_WARNING "RAM disk image present, but " |
| 360 | "no initrd support in kernel, ignoring\n"); |
| 361 | #endif |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 362 | |
| 363 | return 0; |
| 364 | } |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 365 | __tagtable(ATAG_RDIMG, parse_tag_rdimg); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 366 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 367 | static int __init parse_tag_rsvd_mem(struct tag *tag) |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 368 | { |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 369 | struct tag_mem_range *mem = &tag->u.mem_range; |
| 370 | |
| 371 | return add_reserved_region(mem->addr, mem->addr + mem->size - 1, |
| 372 | "Reserved"); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 373 | } |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 374 | __tagtable(ATAG_RSVD_MEM, parse_tag_rsvd_mem); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 375 | |
| 376 | static int __init parse_tag_cmdline(struct tag *tag) |
| 377 | { |
Alon Bar-Lev | bf4352c | 2007-02-12 00:54:08 -0800 | [diff] [blame] | 378 | strlcpy(boot_command_line, tag->u.cmdline.cmdline, COMMAND_LINE_SIZE); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 379 | return 0; |
| 380 | } |
| 381 | __tagtable(ATAG_CMDLINE, parse_tag_cmdline); |
| 382 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 383 | static int __init parse_tag_clock(struct tag *tag) |
| 384 | { |
| 385 | /* |
| 386 | * We'll figure out the clocks by peeking at the system |
| 387 | * manager regs directly. |
| 388 | */ |
| 389 | return 0; |
| 390 | } |
| 391 | __tagtable(ATAG_CLOCK, parse_tag_clock); |
| 392 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 393 | /* |
| 394 | * Scan the tag table for this tag, and call its parse function. The |
| 395 | * tag table is built by the linker from all the __tagtable |
| 396 | * declarations. |
| 397 | */ |
| 398 | static int __init parse_tag(struct tag *tag) |
| 399 | { |
| 400 | extern struct tagtable __tagtable_begin, __tagtable_end; |
| 401 | struct tagtable *t; |
| 402 | |
| 403 | for (t = &__tagtable_begin; t < &__tagtable_end; t++) |
| 404 | if (tag->hdr.tag == t->tag) { |
| 405 | t->parse(tag); |
| 406 | break; |
| 407 | } |
| 408 | |
| 409 | return t < &__tagtable_end; |
| 410 | } |
| 411 | |
| 412 | /* |
| 413 | * Parse all tags in the list we got from the boot loader |
| 414 | */ |
| 415 | static void __init parse_tags(struct tag *t) |
| 416 | { |
| 417 | for (; t->hdr.tag != ATAG_NONE; t = tag_next(t)) |
| 418 | if (!parse_tag(t)) |
| 419 | printk(KERN_WARNING |
| 420 | "Ignoring unrecognised tag 0x%08x\n", |
| 421 | t->hdr.tag); |
| 422 | } |
| 423 | |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 424 | /* |
| 425 | * Find a free memory region large enough for storing the |
| 426 | * bootmem bitmap. |
| 427 | */ |
| 428 | static unsigned long __init |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 429 | find_bootmap_pfn(const struct resource *mem) |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 430 | { |
| 431 | unsigned long bootmap_pages, bootmap_len; |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 432 | unsigned long node_pages = PFN_UP(mem->end - mem->start + 1); |
| 433 | unsigned long bootmap_start; |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 434 | |
| 435 | bootmap_pages = bootmem_bootmap_pages(node_pages); |
| 436 | bootmap_len = bootmap_pages << PAGE_SHIFT; |
| 437 | |
| 438 | /* |
| 439 | * Find a large enough region without reserved pages for |
| 440 | * storing the bootmem bitmap. We can take advantage of the |
| 441 | * fact that all lists have been sorted. |
| 442 | * |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 443 | * We have to check that we don't collide with any reserved |
| 444 | * regions, which includes the kernel image and any RAMDISK |
| 445 | * images. |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 446 | */ |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 447 | bootmap_start = find_free_region(mem, bootmap_len, PAGE_SIZE); |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 448 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 449 | return bootmap_start >> PAGE_SHIFT; |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 450 | } |
| 451 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 452 | #define MAX_LOWMEM HIGHMEM_START |
| 453 | #define MAX_LOWMEM_PFN PFN_DOWN(MAX_LOWMEM) |
| 454 | |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 455 | static void __init setup_bootmem(void) |
| 456 | { |
| 457 | unsigned bootmap_size; |
| 458 | unsigned long first_pfn, bootmap_pfn, pages; |
| 459 | unsigned long max_pfn, max_low_pfn; |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 460 | unsigned node = 0; |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 461 | struct resource *res; |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 462 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 463 | printk(KERN_INFO "Physical memory:\n"); |
| 464 | for (res = system_ram; res; res = res->sibling) |
| 465 | printk(" %08x-%08x\n", res->start, res->end); |
| 466 | printk(KERN_INFO "Reserved memory:\n"); |
| 467 | for (res = reserved; res; res = res->sibling) |
| 468 | printk(" %08x-%08x: %s\n", |
| 469 | res->start, res->end, res->name); |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 470 | |
| 471 | nodes_clear(node_online_map); |
| 472 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 473 | if (system_ram->sibling) |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 474 | printk(KERN_WARNING "Only using first memory bank\n"); |
| 475 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 476 | for (res = system_ram; res; res = NULL) { |
| 477 | first_pfn = PFN_UP(res->start); |
| 478 | max_low_pfn = max_pfn = PFN_DOWN(res->end + 1); |
| 479 | bootmap_pfn = find_bootmap_pfn(res); |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 480 | if (bootmap_pfn > max_pfn) |
| 481 | panic("No space for bootmem bitmap!\n"); |
| 482 | |
| 483 | if (max_low_pfn > MAX_LOWMEM_PFN) { |
| 484 | max_low_pfn = MAX_LOWMEM_PFN; |
| 485 | #ifndef CONFIG_HIGHMEM |
| 486 | /* |
| 487 | * Lowmem is memory that can be addressed |
| 488 | * directly through P1/P2 |
| 489 | */ |
| 490 | printk(KERN_WARNING |
| 491 | "Node %u: Only %ld MiB of memory will be used.\n", |
| 492 | node, MAX_LOWMEM >> 20); |
| 493 | printk(KERN_WARNING "Use a HIGHMEM enabled kernel.\n"); |
| 494 | #else |
| 495 | #error HIGHMEM is not supported by AVR32 yet |
| 496 | #endif |
| 497 | } |
| 498 | |
| 499 | /* Initialize the boot-time allocator with low memory only. */ |
| 500 | bootmap_size = init_bootmem_node(NODE_DATA(node), bootmap_pfn, |
| 501 | first_pfn, max_low_pfn); |
| 502 | |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 503 | /* |
| 504 | * Register fully available RAM pages with the bootmem |
| 505 | * allocator. |
| 506 | */ |
| 507 | pages = max_low_pfn - first_pfn; |
| 508 | free_bootmem_node (NODE_DATA(node), PFN_PHYS(first_pfn), |
| 509 | PFN_PHYS(pages)); |
| 510 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 511 | /* Reserve space for the bootmem bitmap... */ |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 512 | reserve_bootmem_node(NODE_DATA(node), |
| 513 | PFN_PHYS(bootmap_pfn), |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 514 | bootmap_size, |
| 515 | BOOTMEM_DEFAULT); |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 516 | |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 517 | /* ...and any other reserved regions. */ |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 518 | for (res = reserved; res; res = res->sibling) { |
| 519 | if (res->start > PFN_PHYS(max_pfn)) |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 520 | break; |
| 521 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 522 | /* |
| 523 | * resource_init will complain about partial |
| 524 | * overlaps, so we'll just ignore such |
| 525 | * resources for now. |
| 526 | */ |
| 527 | if (res->start >= PFN_PHYS(first_pfn) |
| 528 | && res->end < PFN_PHYS(max_pfn)) |
| 529 | reserve_bootmem_node( |
| 530 | NODE_DATA(node), res->start, |
Bernhard Walle | 72a7fe3 | 2008-02-07 00:15:17 -0800 | [diff] [blame] | 531 | res->end - res->start + 1, |
| 532 | BOOTMEM_DEFAULT); |
Haavard Skinnemoen | 5539f59 | 2007-03-21 15:39:18 +0100 | [diff] [blame] | 533 | } |
| 534 | |
| 535 | node_set_online(node); |
| 536 | } |
| 537 | } |
| 538 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 539 | void __init setup_arch (char **cmdline_p) |
| 540 | { |
| 541 | struct clk *cpu_clk; |
| 542 | |
Haavard Skinnemoen | d801176 | 2007-03-21 16:02:57 +0100 | [diff] [blame] | 543 | init_mm.start_code = (unsigned long)_text; |
| 544 | init_mm.end_code = (unsigned long)_etext; |
| 545 | init_mm.end_data = (unsigned long)_edata; |
| 546 | init_mm.brk = (unsigned long)_end; |
| 547 | |
| 548 | /* |
| 549 | * Include .init section to make allocations easier. It will |
| 550 | * be removed before the resource is actually requested. |
| 551 | */ |
| 552 | kernel_code.start = __pa(__init_begin); |
| 553 | kernel_code.end = __pa(init_mm.end_code - 1); |
| 554 | kernel_data.start = __pa(init_mm.end_code); |
| 555 | kernel_data.end = __pa(init_mm.brk - 1); |
| 556 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 557 | parse_tags(bootloader_tags); |
| 558 | |
| 559 | setup_processor(); |
| 560 | setup_platform(); |
Haavard Skinnemoen | c194588 | 2006-10-04 16:02:10 +0200 | [diff] [blame] | 561 | setup_board(); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 562 | |
| 563 | cpu_clk = clk_get(NULL, "cpu"); |
| 564 | if (IS_ERR(cpu_clk)) { |
| 565 | printk(KERN_WARNING "Warning: Unable to get CPU clock\n"); |
| 566 | } else { |
| 567 | unsigned long cpu_hz = clk_get_rate(cpu_clk); |
| 568 | |
| 569 | /* |
| 570 | * Well, duh, but it's probably a good idea to |
| 571 | * increment the use count. |
| 572 | */ |
| 573 | clk_enable(cpu_clk); |
| 574 | |
| 575 | boot_cpu_data.clk = cpu_clk; |
| 576 | boot_cpu_data.loops_per_jiffy = cpu_hz * 4; |
| 577 | printk("CPU: Running at %lu.%03lu MHz\n", |
| 578 | ((cpu_hz + 500) / 1000) / 1000, |
| 579 | ((cpu_hz + 500) / 1000) % 1000); |
| 580 | } |
| 581 | |
Alon Bar-Lev | bf4352c | 2007-02-12 00:54:08 -0800 | [diff] [blame] | 582 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 583 | *cmdline_p = command_line; |
| 584 | parse_early_param(); |
| 585 | |
| 586 | setup_bootmem(); |
| 587 | |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 588 | #ifdef CONFIG_VT |
| 589 | conswitchp = &dummy_con; |
| 590 | #endif |
| 591 | |
| 592 | paging_init(); |
Haavard Skinnemoen | 5f97f7f | 2006-09-25 23:32:13 -0700 | [diff] [blame] | 593 | resource_init(); |
| 594 | } |