Commit | Line | Data |
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1da177e4 LT |
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. | |
70342287 | 11 | * Copyright (C) 2000, 2001, 2002, 2007 Maciej W. Rozycki |
1da177e4 | 12 | */ |
1da177e4 LT |
13 | #include <linux/init.h> |
14 | #include <linux/ioport.h> | |
73bc256d | 15 | #include <linux/export.h> |
894673ee | 16 | #include <linux/screen_info.h> |
9d15ffc8 | 17 | #include <linux/memblock.h> |
1da177e4 LT |
18 | #include <linux/bootmem.h> |
19 | #include <linux/initrd.h> | |
1da177e4 LT |
20 | #include <linux/root_dev.h> |
21 | #include <linux/highmem.h> | |
22 | #include <linux/console.h> | |
22a9835c | 23 | #include <linux/pfn.h> |
6312e0ee | 24 | #include <linux/debugfs.h> |
7aa1c8f4 | 25 | #include <linux/kexec.h> |
4d9f77d2 | 26 | #include <linux/sizes.h> |
f4649382 ZLK |
27 | #include <linux/device.h> |
28 | #include <linux/dma-contiguous.h> | |
1da177e4 LT |
29 | |
30 | #include <asm/addrspace.h> | |
31 | #include <asm/bootinfo.h> | |
20d60d99 | 32 | #include <asm/bugs.h> |
ec74e361 | 33 | #include <asm/cache.h> |
e934945d | 34 | #include <asm/cdmm.h> |
1da177e4 | 35 | #include <asm/cpu.h> |
75dcfc1d | 36 | #include <asm/debug.h> |
1da177e4 LT |
37 | #include <asm/sections.h> |
38 | #include <asm/setup.h> | |
87353d8a | 39 | #include <asm/smp-ops.h> |
f2ffa5ab | 40 | #include <asm/prom.h> |
1da177e4 | 41 | |
87db537d AK |
42 | #ifdef CONFIG_MIPS_ELF_APPENDED_DTB |
43 | const char __section(.appended_dtb) __appended_dtb[0x100000]; | |
44 | #endif /* CONFIG_MIPS_ELF_APPENDED_DTB */ | |
45 | ||
ec74e361 | 46 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
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 | */ | |
ec74e361 | 66 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
67 | |
68 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
69 | |
70 | struct boot_mem_map boot_mem_map; | |
71 | ||
6acc7d48 DV |
72 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
73 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
74 | ||
75 | #ifdef CONFIG_CMDLINE_BOOL | |
76 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
77 | #endif | |
1da177e4 LT |
78 | |
79 | /* | |
80 | * mips_io_port_base is the begin of the address space to which x86 style | |
81 | * I/O ports are mapped. | |
82 | */ | |
1befdd55 | 83 | const unsigned long mips_io_port_base = -1; |
1da177e4 LT |
84 | EXPORT_SYMBOL(mips_io_port_base); |
85 | ||
1da177e4 LT |
86 | static struct resource code_resource = { .name = "Kernel code", }; |
87 | static struct resource data_resource = { .name = "Kernel data", }; | |
88 | ||
4d9f77d2 JC |
89 | static void *detect_magic __initdata = detect_memory_region; |
90 | ||
15d45cce | 91 | void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type) |
1da177e4 LT |
92 | { |
93 | int x = boot_mem_map.nr_map; | |
0ec7ec75 | 94 | int i; |
1da177e4 | 95 | |
b6f1f0de FBH |
96 | /* Sanity check */ |
97 | if (start + size < start) { | |
7178d2cd | 98 | pr_warn("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
99 | return; |
100 | } | |
101 | ||
1da177e4 | 102 | /* |
0ec7ec75 | 103 | * Try to merge with existing entry, if any. |
1da177e4 | 104 | */ |
0ec7ec75 RB |
105 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
106 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
107 | unsigned long top; | |
108 | ||
109 | if (entry->type != type) | |
110 | continue; | |
111 | ||
112 | if (start + size < entry->addr) | |
113 | continue; /* no overlap */ | |
114 | ||
115 | if (entry->addr + entry->size < start) | |
116 | continue; /* no overlap */ | |
117 | ||
118 | top = max(entry->addr + entry->size, start + size); | |
119 | entry->addr = min(entry->addr, start); | |
120 | entry->size = top - entry->addr; | |
121 | ||
1da177e4 LT |
122 | return; |
123 | } | |
124 | ||
0ec7ec75 | 125 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 126 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
127 | return; |
128 | } | |
129 | ||
130 | boot_mem_map.map[x].addr = start; | |
131 | boot_mem_map.map[x].size = size; | |
132 | boot_mem_map.map[x].type = type; | |
133 | boot_mem_map.nr_map++; | |
134 | } | |
135 | ||
15d45cce | 136 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
4d9f77d2 JC |
137 | { |
138 | void *dm = &detect_magic; | |
15d45cce | 139 | phys_addr_t size; |
4d9f77d2 JC |
140 | |
141 | for (size = sz_min; size < sz_max; size <<= 1) { | |
142 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
143 | break; | |
144 | } | |
145 | ||
146 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
147 | ((unsigned long long) size) / SZ_1M, | |
148 | (unsigned long long) start, | |
149 | ((unsigned long long) sz_min) / SZ_1M, | |
150 | ((unsigned long long) sz_max) / SZ_1M); | |
151 | ||
152 | add_memory_region(start, size, BOOT_MEM_RAM); | |
153 | } | |
154 | ||
1da177e4 LT |
155 | static void __init print_memory_map(void) |
156 | { | |
157 | int i; | |
158 | const int field = 2 * sizeof(unsigned long); | |
159 | ||
160 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 161 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
162 | field, (unsigned long long) boot_mem_map.map[i].size, |
163 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
164 | ||
165 | switch (boot_mem_map.map[i].type) { | |
166 | case BOOT_MEM_RAM: | |
a64ae7a2 | 167 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 168 | break; |
43064c0c DD |
169 | case BOOT_MEM_INIT_RAM: |
170 | printk(KERN_CONT "(usable after init)\n"); | |
171 | break; | |
1da177e4 | 172 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 173 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
174 | break; |
175 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 176 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
177 | break; |
178 | default: | |
a64ae7a2 | 179 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
180 | break; |
181 | } | |
182 | } | |
183 | } | |
184 | ||
d2043ca8 FBH |
185 | /* |
186 | * Manage initrd | |
187 | */ | |
188 | #ifdef CONFIG_BLK_DEV_INITRD | |
189 | ||
a09fc446 | 190 | static int __init rd_start_early(char *p) |
1da177e4 | 191 | { |
a09fc446 | 192 | unsigned long start = memparse(p, &p); |
1da177e4 | 193 | |
875d43e7 | 194 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
195 | /* Guess if the sign extension was forgotten by bootloader */ |
196 | if (start < XKPHYS) | |
197 | start = (int)start; | |
1da177e4 | 198 | #endif |
a09fc446 FBH |
199 | initrd_start = start; |
200 | initrd_end += start; | |
a09fc446 FBH |
201 | return 0; |
202 | } | |
203 | early_param("rd_start", rd_start_early); | |
204 | ||
205 | static int __init rd_size_early(char *p) | |
206 | { | |
207 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
208 | return 0; |
209 | } | |
a09fc446 | 210 | early_param("rd_size", rd_size_early); |
1da177e4 | 211 | |
a7837b76 | 212 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
213 | static unsigned long __init init_initrd(void) |
214 | { | |
a7837b76 | 215 | unsigned long end; |
d2043ca8 | 216 | |
d2043ca8 | 217 | /* |
a09fc446 FBH |
218 | * Board specific code or command line parser should have |
219 | * already set up initrd_start and initrd_end. In these cases | |
220 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 221 | */ |
32028f1f | 222 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 223 | goto disable; |
a7837b76 | 224 | |
a7837b76 | 225 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 226 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 227 | goto disable; |
d2043ca8 | 228 | } |
a7837b76 | 229 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 230 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
231 | goto disable; |
232 | } | |
233 | ||
234 | /* | |
235 | * Sanitize initrd addresses. For example firmware | |
236 | * can't guess if they need to pass them through | |
237 | * 64-bits values if the kernel has been built in pure | |
238 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
239 | * addresses now, so the code can now safely use __pa(). | |
240 | */ | |
241 | end = __pa(initrd_end); | |
242 | initrd_end = (unsigned long)__va(end); | |
243 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
244 | ||
245 | ROOT_DEV = Root_RAM0; | |
246 | return PFN_UP(end); | |
247 | disable: | |
248 | initrd_start = 0; | |
249 | initrd_end = 0; | |
250 | return 0; | |
d2043ca8 FBH |
251 | } |
252 | ||
253 | static void __init finalize_initrd(void) | |
254 | { | |
255 | unsigned long size = initrd_end - initrd_start; | |
256 | ||
257 | if (size == 0) { | |
258 | printk(KERN_INFO "Initrd not found or empty"); | |
259 | goto disable; | |
260 | } | |
d4df6d4e | 261 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 262 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
263 | goto disable; |
264 | } | |
265 | ||
72a7fe39 | 266 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
267 | initrd_below_start_ok = 1; |
268 | ||
a64ae7a2 MC |
269 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
270 | initrd_start, size); | |
d2043ca8 FBH |
271 | return; |
272 | disable: | |
a64ae7a2 | 273 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
274 | initrd_start = 0; |
275 | initrd_end = 0; | |
276 | } | |
277 | ||
278 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
279 | ||
9ba126cf RB |
280 | static unsigned long __init init_initrd(void) |
281 | { | |
282 | return 0; | |
283 | } | |
284 | ||
d2043ca8 FBH |
285 | #define finalize_initrd() do {} while (0) |
286 | ||
287 | #endif | |
288 | ||
b6f1f0de FBH |
289 | /* |
290 | * Initialize the bootmem allocator. It also setup initrd related data | |
291 | * if needed. | |
292 | */ | |
c4617318 | 293 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) |
d2043ca8 | 294 | |
b6f1f0de | 295 | static void __init bootmem_init(void) |
1da177e4 | 296 | { |
d2043ca8 FBH |
297 | init_initrd(); |
298 | finalize_initrd(); | |
299 | } | |
300 | ||
301 | #else /* !CONFIG_SGI_IP27 */ | |
302 | ||
303 | static void __init bootmem_init(void) | |
304 | { | |
e452e94e | 305 | unsigned long reserved_end; |
db84dc61 | 306 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
307 | unsigned long bootmap_size; |
308 | int i; | |
1da177e4 LT |
309 | |
310 | /* | |
f9a7febd GU |
311 | * Sanity check any INITRD first. We don't take it into account |
312 | * for bootmem setup initially, rely on the end-of-kernel-code | |
313 | * as our memory range starting point. Once bootmem is inited we | |
314 | * will reserve the area used for the initrd. | |
1da177e4 | 315 | */ |
f9a7febd GU |
316 | init_initrd(); |
317 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); | |
1da177e4 | 318 | |
db84dc61 FBH |
319 | /* |
320 | * max_low_pfn is not a number of pages. The number of pages | |
321 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
322 | */ | |
323 | min_low_pfn = ~0UL; | |
324 | max_low_pfn = 0; | |
325 | ||
b6f1f0de FBH |
326 | /* |
327 | * Find the highest page frame number we have available. | |
328 | */ | |
1da177e4 LT |
329 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
330 | unsigned long start, end; | |
331 | ||
332 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
333 | continue; | |
334 | ||
335 | start = PFN_UP(boot_mem_map.map[i].addr); | |
336 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 337 | + boot_mem_map.map[i].size); |
1da177e4 | 338 | |
db84dc61 FBH |
339 | if (end > max_low_pfn) |
340 | max_low_pfn = end; | |
341 | if (start < min_low_pfn) | |
342 | min_low_pfn = start; | |
b6f1f0de | 343 | if (end <= reserved_end) |
1da177e4 | 344 | continue; |
a6335fa1 | 345 | #ifdef CONFIG_BLK_DEV_INITRD |
88d34269 | 346 | /* Skip zones before initrd and initrd itself */ |
a6335fa1 AS |
347 | if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) |
348 | continue; | |
349 | #endif | |
b6f1f0de FBH |
350 | if (start >= mapstart) |
351 | continue; | |
352 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
353 | } |
354 | ||
db84dc61 FBH |
355 | if (min_low_pfn >= max_low_pfn) |
356 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 357 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
358 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
359 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
360 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 361 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
362 | pr_info("%lu free pages won't be used\n", |
363 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 364 | } |
6f284a2c | 365 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 366 | |
1da177e4 LT |
367 | /* |
368 | * Determine low and high memory ranges | |
369 | */ | |
dc3bf353 | 370 | max_pfn = max_low_pfn; |
db84dc61 | 371 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
372 | #ifdef CONFIG_HIGHMEM |
373 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 374 | highend_pfn = max_low_pfn; |
1da177e4 | 375 | #endif |
db84dc61 | 376 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
377 | } |
378 | ||
88d34269 AS |
379 | #ifdef CONFIG_BLK_DEV_INITRD |
380 | /* | |
381 | * mapstart should be after initrd_end | |
382 | */ | |
383 | if (initrd_end) | |
384 | mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); | |
385 | #endif | |
386 | ||
1da177e4 | 387 | /* |
b6f1f0de | 388 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 389 | */ |
db84dc61 FBH |
390 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
391 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
392 | |
393 | ||
cce335ae RB |
394 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
395 | unsigned long start, end; | |
396 | ||
397 | start = PFN_UP(boot_mem_map.map[i].addr); | |
398 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
399 | + boot_mem_map.map[i].size); | |
400 | ||
e452e94e AN |
401 | if (start <= min_low_pfn) |
402 | start = min_low_pfn; | |
cce335ae RB |
403 | if (start >= end) |
404 | continue; | |
405 | ||
406 | #ifndef CONFIG_HIGHMEM | |
407 | if (end > max_low_pfn) | |
408 | end = max_low_pfn; | |
409 | ||
410 | /* | |
411 | * ... finally, is the area going away? | |
412 | */ | |
413 | if (end <= start) | |
414 | continue; | |
415 | #endif | |
416 | ||
9d15ffc8 | 417 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
cce335ae RB |
418 | } |
419 | ||
1da177e4 LT |
420 | /* |
421 | * Register fully available low RAM pages with the bootmem allocator. | |
422 | */ | |
423 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 424 | unsigned long start, end, size; |
1da177e4 | 425 | |
43064c0c DD |
426 | start = PFN_UP(boot_mem_map.map[i].addr); |
427 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
428 | + boot_mem_map.map[i].size); | |
429 | ||
1da177e4 LT |
430 | /* |
431 | * Reserve usable memory. | |
432 | */ | |
43064c0c DD |
433 | switch (boot_mem_map.map[i].type) { |
434 | case BOOT_MEM_RAM: | |
435 | break; | |
436 | case BOOT_MEM_INIT_RAM: | |
437 | memory_present(0, start, end); | |
1da177e4 | 438 | continue; |
43064c0c DD |
439 | default: |
440 | /* Not usable memory */ | |
441 | continue; | |
442 | } | |
1da177e4 | 443 | |
1da177e4 | 444 | /* |
b6f1f0de FBH |
445 | * We are rounding up the start address of usable memory |
446 | * and at the end of the usable range downwards. | |
1da177e4 | 447 | */ |
b6f1f0de | 448 | if (start >= max_low_pfn) |
1da177e4 | 449 | continue; |
b6f1f0de FBH |
450 | if (start < reserved_end) |
451 | start = reserved_end; | |
452 | if (end > max_low_pfn) | |
453 | end = max_low_pfn; | |
1da177e4 LT |
454 | |
455 | /* | |
b6f1f0de | 456 | * ... finally, is the area going away? |
1da177e4 | 457 | */ |
b6f1f0de | 458 | if (end <= start) |
1da177e4 | 459 | continue; |
b6f1f0de | 460 | size = end - start; |
1da177e4 LT |
461 | |
462 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
463 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
464 | memory_present(0, start, end); | |
1da177e4 LT |
465 | } |
466 | ||
b6f1f0de FBH |
467 | /* |
468 | * Reserve the bootmap memory. | |
469 | */ | |
72a7fe39 | 470 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 471 | |
d2043ca8 FBH |
472 | /* |
473 | * Reserve initrd memory if needed. | |
474 | */ | |
475 | finalize_initrd(); | |
1da177e4 LT |
476 | } |
477 | ||
d2043ca8 FBH |
478 | #endif /* CONFIG_SGI_IP27 */ |
479 | ||
2925aba4 | 480 | /* |
603e82ed | 481 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
482 | * |
483 | * o plat_mem_setup() detects the memory configuration and will record detected | |
484 | * memory areas using add_memory_region. | |
2925aba4 RB |
485 | * |
486 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 487 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
488 | * |
489 | * o bootmem_init() | |
490 | * o sparse_init() | |
491 | * o paging_init() | |
e1c05067 | 492 | * o dma_contiguous_reserve() |
2925aba4 RB |
493 | * |
494 | * At this stage the bootmem allocator is ready to use. | |
495 | * | |
496 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 497 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 | 498 | * get away without any kind of memory allocator. To keep old code from |
7f0dd768 | 499 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform |
2925aba4 RB |
500 | * initialization hook for anything else was introduced. |
501 | */ | |
502 | ||
982f6ffe | 503 | static int usermem __initdata; |
a09fc446 FBH |
504 | |
505 | static int __init early_parse_mem(char *p) | |
506 | { | |
ad8f723a | 507 | phys_addr_t start, size; |
a09fc446 FBH |
508 | |
509 | /* | |
510 | * If a user specifies memory size, we | |
511 | * blow away any automatically generated | |
512 | * size. | |
513 | */ | |
514 | if (usermem == 0) { | |
515 | boot_mem_map.nr_map = 0; | |
516 | usermem = 1; | |
70342287 | 517 | } |
a09fc446 FBH |
518 | start = 0; |
519 | size = memparse(p, &p); | |
520 | if (*p == '@') | |
521 | start = memparse(p + 1, &p); | |
522 | ||
523 | add_memory_region(start, size, BOOT_MEM_RAM); | |
524 | return 0; | |
525 | } | |
526 | early_param("mem", early_parse_mem); | |
2925aba4 | 527 | |
4893fc88 CM |
528 | #ifdef CONFIG_PROC_VMCORE |
529 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; | |
530 | static int __init early_parse_elfcorehdr(char *p) | |
531 | { | |
532 | int i; | |
533 | ||
534 | setup_elfcorehdr = memparse(p, &p); | |
535 | ||
536 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
537 | unsigned long start = boot_mem_map.map[i].addr; | |
538 | unsigned long end = (boot_mem_map.map[i].addr + | |
539 | boot_mem_map.map[i].size); | |
540 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { | |
541 | /* | |
542 | * Reserve from the elf core header to the end of | |
543 | * the memory segment, that should all be kdump | |
544 | * reserved memory. | |
545 | */ | |
546 | setup_elfcorehdr_size = end - setup_elfcorehdr; | |
547 | break; | |
548 | } | |
549 | } | |
550 | /* | |
551 | * If we don't find it in the memory map, then we shouldn't | |
552 | * have to worry about it, as the new kernel won't use it. | |
553 | */ | |
554 | return 0; | |
555 | } | |
556 | early_param("elfcorehdr", early_parse_elfcorehdr); | |
557 | #endif | |
558 | ||
15d45cce | 559 | static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
2925aba4 | 560 | { |
15d45cce | 561 | phys_addr_t size; |
d3ff9338 | 562 | int i; |
43064c0c | 563 | |
d3ff9338 CM |
564 | size = end - mem; |
565 | if (!size) | |
566 | return; | |
567 | ||
568 | /* Make sure it is in the boot_mem_map */ | |
569 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
570 | if (mem >= boot_mem_map.map[i].addr && | |
571 | mem < (boot_mem_map.map[i].addr + | |
572 | boot_mem_map.map[i].size)) | |
573 | return; | |
574 | } | |
575 | add_memory_region(mem, size, type); | |
576 | } | |
43064c0c | 577 | |
c2882b7f PM |
578 | #ifdef CONFIG_KEXEC |
579 | static inline unsigned long long get_total_mem(void) | |
580 | { | |
581 | unsigned long long total; | |
582 | ||
583 | total = max_pfn - min_low_pfn; | |
584 | return total << PAGE_SHIFT; | |
585 | } | |
586 | ||
587 | static void __init mips_parse_crashkernel(void) | |
588 | { | |
589 | unsigned long long total_mem; | |
590 | unsigned long long crash_size, crash_base; | |
591 | int ret; | |
592 | ||
593 | total_mem = get_total_mem(); | |
594 | ret = parse_crashkernel(boot_command_line, total_mem, | |
595 | &crash_size, &crash_base); | |
596 | if (ret != 0 || crash_size <= 0) | |
597 | return; | |
598 | ||
599 | crashk_res.start = crash_base; | |
600 | crashk_res.end = crash_base + crash_size - 1; | |
601 | } | |
602 | ||
603 | static void __init request_crashkernel(struct resource *res) | |
604 | { | |
605 | int ret; | |
606 | ||
607 | ret = request_resource(res, &crashk_res); | |
608 | if (!ret) | |
609 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
610 | (unsigned long)((crashk_res.end - | |
611 | crashk_res.start + 1) >> 20), | |
612 | (unsigned long)(crashk_res.start >> 20)); | |
613 | } | |
614 | #else /* !defined(CONFIG_KEXEC) */ | |
615 | static void __init mips_parse_crashkernel(void) | |
616 | { | |
617 | } | |
618 | ||
619 | static void __init request_crashkernel(struct resource *res) | |
620 | { | |
621 | } | |
622 | #endif /* !defined(CONFIG_KEXEC) */ | |
623 | ||
2024972e JG |
624 | #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER) |
625 | #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) | |
2549cc96 | 626 | #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_DTB_EXTEND) |
2024972e | 627 | |
d3ff9338 CM |
628 | static void __init arch_mem_init(char **cmdline_p) |
629 | { | |
f4649382 | 630 | struct memblock_region *reg; |
a09fc446 FBH |
631 | extern void plat_mem_setup(void); |
632 | ||
2925aba4 RB |
633 | /* call board setup routine */ |
634 | plat_mem_setup(); | |
635 | ||
d3ff9338 CM |
636 | /* |
637 | * Make sure all kernel memory is in the maps. The "UP" and | |
638 | * "DOWN" are opposite for initdata since if it crosses over | |
639 | * into another memory section you don't want that to be | |
640 | * freed when the initdata is freed. | |
641 | */ | |
642 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, | |
643 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, | |
644 | BOOT_MEM_RAM); | |
645 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, | |
646 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, | |
647 | BOOT_MEM_INIT_RAM); | |
43064c0c | 648 | |
a64ae7a2 | 649 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
650 | print_memory_map(); |
651 | ||
2024972e | 652 | #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE) |
6acc7d48 DV |
653 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
654 | #else | |
2024972e JG |
655 | if ((USE_PROM_CMDLINE && arcs_cmdline[0]) || |
656 | (USE_DTB_CMDLINE && !boot_command_line[0])) | |
657 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
658 | ||
659 | if (EXTEND_WITH_PROM && arcs_cmdline[0]) { | |
660 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
661 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
662 | } | |
663 | ||
664 | #if defined(CONFIG_CMDLINE_BOOL) | |
6acc7d48 | 665 | if (builtin_cmdline[0]) { |
2024972e JG |
666 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
667 | strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
6acc7d48 | 668 | } |
6acc7d48 | 669 | #endif |
6acc7d48 DV |
670 | #endif |
671 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
672 | |
673 | *cmdline_p = command_line; | |
674 | ||
a09fc446 FBH |
675 | parse_early_param(); |
676 | ||
677 | if (usermem) { | |
a64ae7a2 | 678 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
679 | print_memory_map(); |
680 | } | |
681 | ||
2925aba4 | 682 | bootmem_init(); |
4893fc88 CM |
683 | #ifdef CONFIG_PROC_VMCORE |
684 | if (setup_elfcorehdr && setup_elfcorehdr_size) { | |
685 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", | |
686 | setup_elfcorehdr, setup_elfcorehdr_size); | |
687 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, | |
688 | BOOTMEM_DEFAULT); | |
689 | } | |
690 | #endif | |
c2882b7f PM |
691 | |
692 | mips_parse_crashkernel(); | |
7aa1c8f4 RB |
693 | #ifdef CONFIG_KEXEC |
694 | if (crashk_res.start != crashk_res.end) | |
695 | reserve_bootmem(crashk_res.start, | |
696 | crashk_res.end - crashk_res.start + 1, | |
697 | BOOTMEM_DEFAULT); | |
698 | #endif | |
f2ffa5ab | 699 | device_tree_init(); |
2925aba4 | 700 | sparse_init(); |
ee71b7d2 | 701 | plat_swiotlb_setup(); |
2925aba4 | 702 | paging_init(); |
f4649382 ZLK |
703 | |
704 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); | |
705 | /* Tell bootmem about cma reserved memblock section */ | |
706 | for_each_memblock(reserved, reg) | |
30fa0530 ZLK |
707 | if (reg->size != 0) |
708 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
2925aba4 RB |
709 | } |
710 | ||
8df32c63 | 711 | static void __init resource_init(void) |
1da177e4 LT |
712 | { |
713 | int i; | |
714 | ||
6adb5fe7 RB |
715 | if (UNCAC_BASE != IO_BASE) |
716 | return; | |
717 | ||
f5bffe3a FBH |
718 | code_resource.start = __pa_symbol(&_text); |
719 | code_resource.end = __pa_symbol(&_etext) - 1; | |
720 | data_resource.start = __pa_symbol(&_etext); | |
721 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 | 722 | |
1da177e4 LT |
723 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
724 | struct resource *res; | |
725 | unsigned long start, end; | |
726 | ||
727 | start = boot_mem_map.map[i].addr; | |
728 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 729 | if (start >= HIGHMEM_START) |
1da177e4 | 730 | continue; |
1c6fd44d FBH |
731 | if (end >= HIGHMEM_START) |
732 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
733 | |
734 | res = alloc_bootmem(sizeof(struct resource)); | |
35d98e93 TK |
735 | |
736 | res->start = start; | |
737 | res->end = end; | |
738 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
739 | ||
1da177e4 LT |
740 | switch (boot_mem_map.map[i].type) { |
741 | case BOOT_MEM_RAM: | |
43064c0c | 742 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
743 | case BOOT_MEM_ROM_DATA: |
744 | res->name = "System RAM"; | |
35d98e93 | 745 | res->flags |= IORESOURCE_SYSRAM; |
1da177e4 LT |
746 | break; |
747 | case BOOT_MEM_RESERVED: | |
748 | default: | |
749 | res->name = "reserved"; | |
750 | } | |
751 | ||
1da177e4 LT |
752 | request_resource(&iomem_resource, res); |
753 | ||
754 | /* | |
755 | * We don't know which RAM region contains kernel data, | |
756 | * so we try it repeatedly and let the resource manager | |
757 | * test it. | |
758 | */ | |
759 | request_resource(res, &code_resource); | |
760 | request_resource(res, &data_resource); | |
7aa1c8f4 | 761 | request_crashkernel(res); |
1da177e4 LT |
762 | } |
763 | } | |
764 | ||
0f3f506b HC |
765 | #ifdef CONFIG_SMP |
766 | static void __init prefill_possible_map(void) | |
767 | { | |
768 | int i, possible = num_possible_cpus(); | |
769 | ||
770 | if (possible > nr_cpu_ids) | |
771 | possible = nr_cpu_ids; | |
772 | ||
773 | for (i = 0; i < possible; i++) | |
774 | set_cpu_possible(i, true); | |
775 | for (; i < NR_CPUS; i++) | |
776 | set_cpu_possible(i, false); | |
777 | ||
778 | nr_cpu_ids = possible; | |
779 | } | |
780 | #else | |
781 | static inline void prefill_possible_map(void) {} | |
782 | #endif | |
783 | ||
1da177e4 LT |
784 | void __init setup_arch(char **cmdline_p) |
785 | { | |
786 | cpu_probe(); | |
3af5a67c | 787 | mips_cm_probe(); |
1da177e4 | 788 | prom_init(); |
36a88530 | 789 | |
e934945d | 790 | setup_early_fdc_console(); |
36a88530 | 791 | #ifdef CONFIG_EARLY_PRINTK |
07cdb784 | 792 | setup_early_printk(); |
36a88530 | 793 | #endif |
1da177e4 | 794 | cpu_report(); |
20d60d99 | 795 | check_bugs_early(); |
1da177e4 LT |
796 | |
797 | #if defined(CONFIG_VT) | |
798 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 799 | conswitchp = &vga_con; |
1da177e4 | 800 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 801 | conswitchp = &dummy_con; |
1da177e4 LT |
802 | #endif |
803 | #endif | |
804 | ||
2925aba4 | 805 | arch_mem_init(cmdline_p); |
1da177e4 | 806 | |
1da177e4 | 807 | resource_init(); |
9b6695a8 | 808 | plat_smp_setup(); |
0f3f506b | 809 | prefill_possible_map(); |
6650df3c DD |
810 | |
811 | cpu_cache_init(); | |
1da177e4 LT |
812 | } |
813 | ||
69a6c312 AN |
814 | unsigned long kernelsp[NR_CPUS]; |
815 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
816 | |
817 | #ifdef CONFIG_DEBUG_FS | |
818 | struct dentry *mips_debugfs_dir; | |
819 | static int __init debugfs_mips(void) | |
820 | { | |
821 | struct dentry *d; | |
822 | ||
823 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
824 | if (!d) |
825 | return -ENOMEM; | |
6312e0ee AN |
826 | mips_debugfs_dir = d; |
827 | return 0; | |
828 | } | |
829 | arch_initcall(debugfs_mips); | |
830 | #endif |