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 | |
ec74e361 | 42 | struct cpuinfo_mips cpu_data[NR_CPUS] __read_mostly; |
1da177e4 LT |
43 | |
44 | EXPORT_SYMBOL(cpu_data); | |
45 | ||
46 | #ifdef CONFIG_VT | |
47 | struct screen_info screen_info; | |
48 | #endif | |
49 | ||
50 | /* | |
51 | * Despite it's name this variable is even if we don't have PCI | |
52 | */ | |
53 | unsigned int PCI_DMA_BUS_IS_PHYS; | |
54 | ||
55 | EXPORT_SYMBOL(PCI_DMA_BUS_IS_PHYS); | |
56 | ||
57 | /* | |
58 | * Setup information | |
59 | * | |
60 | * These are initialized so they are in the .data section | |
61 | */ | |
ec74e361 | 62 | unsigned long mips_machtype __read_mostly = MACH_UNKNOWN; |
1da177e4 LT |
63 | |
64 | EXPORT_SYMBOL(mips_machtype); | |
1da177e4 LT |
65 | |
66 | struct boot_mem_map boot_mem_map; | |
67 | ||
6acc7d48 DV |
68 | static char __initdata command_line[COMMAND_LINE_SIZE]; |
69 | char __initdata arcs_cmdline[COMMAND_LINE_SIZE]; | |
70 | ||
71 | #ifdef CONFIG_CMDLINE_BOOL | |
72 | static char __initdata builtin_cmdline[COMMAND_LINE_SIZE] = CONFIG_CMDLINE; | |
73 | #endif | |
1da177e4 LT |
74 | |
75 | /* | |
76 | * mips_io_port_base is the begin of the address space to which x86 style | |
77 | * I/O ports are mapped. | |
78 | */ | |
1befdd55 | 79 | const unsigned long mips_io_port_base = -1; |
1da177e4 LT |
80 | EXPORT_SYMBOL(mips_io_port_base); |
81 | ||
1da177e4 LT |
82 | static struct resource code_resource = { .name = "Kernel code", }; |
83 | static struct resource data_resource = { .name = "Kernel data", }; | |
84 | ||
4d9f77d2 JC |
85 | static void *detect_magic __initdata = detect_memory_region; |
86 | ||
15d45cce | 87 | void __init add_memory_region(phys_addr_t start, phys_addr_t size, long type) |
1da177e4 LT |
88 | { |
89 | int x = boot_mem_map.nr_map; | |
0ec7ec75 | 90 | int i; |
1da177e4 | 91 | |
b6f1f0de FBH |
92 | /* Sanity check */ |
93 | if (start + size < start) { | |
7178d2cd | 94 | pr_warn("Trying to add an invalid memory region, skipped\n"); |
b6f1f0de FBH |
95 | return; |
96 | } | |
97 | ||
1da177e4 | 98 | /* |
0ec7ec75 | 99 | * Try to merge with existing entry, if any. |
1da177e4 | 100 | */ |
0ec7ec75 RB |
101 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
102 | struct boot_mem_map_entry *entry = boot_mem_map.map + i; | |
103 | unsigned long top; | |
104 | ||
105 | if (entry->type != type) | |
106 | continue; | |
107 | ||
108 | if (start + size < entry->addr) | |
109 | continue; /* no overlap */ | |
110 | ||
111 | if (entry->addr + entry->size < start) | |
112 | continue; /* no overlap */ | |
113 | ||
114 | top = max(entry->addr + entry->size, start + size); | |
115 | entry->addr = min(entry->addr, start); | |
116 | entry->size = top - entry->addr; | |
117 | ||
1da177e4 LT |
118 | return; |
119 | } | |
120 | ||
0ec7ec75 | 121 | if (boot_mem_map.nr_map == BOOT_MEM_MAP_MAX) { |
a64ae7a2 | 122 | pr_err("Ooops! Too many entries in the memory map!\n"); |
1da177e4 LT |
123 | return; |
124 | } | |
125 | ||
126 | boot_mem_map.map[x].addr = start; | |
127 | boot_mem_map.map[x].size = size; | |
128 | boot_mem_map.map[x].type = type; | |
129 | boot_mem_map.nr_map++; | |
130 | } | |
131 | ||
15d45cce | 132 | void __init detect_memory_region(phys_addr_t start, phys_addr_t sz_min, phys_addr_t sz_max) |
4d9f77d2 JC |
133 | { |
134 | void *dm = &detect_magic; | |
15d45cce | 135 | phys_addr_t size; |
4d9f77d2 JC |
136 | |
137 | for (size = sz_min; size < sz_max; size <<= 1) { | |
138 | if (!memcmp(dm, dm + size, sizeof(detect_magic))) | |
139 | break; | |
140 | } | |
141 | ||
142 | pr_debug("Memory: %lluMB of RAM detected at 0x%llx (min: %lluMB, max: %lluMB)\n", | |
143 | ((unsigned long long) size) / SZ_1M, | |
144 | (unsigned long long) start, | |
145 | ((unsigned long long) sz_min) / SZ_1M, | |
146 | ((unsigned long long) sz_max) / SZ_1M); | |
147 | ||
148 | add_memory_region(start, size, BOOT_MEM_RAM); | |
149 | } | |
150 | ||
1da177e4 LT |
151 | static void __init print_memory_map(void) |
152 | { | |
153 | int i; | |
154 | const int field = 2 * sizeof(unsigned long); | |
155 | ||
156 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
a64ae7a2 | 157 | printk(KERN_INFO " memory: %0*Lx @ %0*Lx ", |
1da177e4 LT |
158 | field, (unsigned long long) boot_mem_map.map[i].size, |
159 | field, (unsigned long long) boot_mem_map.map[i].addr); | |
160 | ||
161 | switch (boot_mem_map.map[i].type) { | |
162 | case BOOT_MEM_RAM: | |
a64ae7a2 | 163 | printk(KERN_CONT "(usable)\n"); |
1da177e4 | 164 | break; |
43064c0c DD |
165 | case BOOT_MEM_INIT_RAM: |
166 | printk(KERN_CONT "(usable after init)\n"); | |
167 | break; | |
1da177e4 | 168 | case BOOT_MEM_ROM_DATA: |
a64ae7a2 | 169 | printk(KERN_CONT "(ROM data)\n"); |
1da177e4 LT |
170 | break; |
171 | case BOOT_MEM_RESERVED: | |
a64ae7a2 | 172 | printk(KERN_CONT "(reserved)\n"); |
1da177e4 LT |
173 | break; |
174 | default: | |
a64ae7a2 | 175 | printk(KERN_CONT "type %lu\n", boot_mem_map.map[i].type); |
1da177e4 LT |
176 | break; |
177 | } | |
178 | } | |
179 | } | |
180 | ||
d2043ca8 FBH |
181 | /* |
182 | * Manage initrd | |
183 | */ | |
184 | #ifdef CONFIG_BLK_DEV_INITRD | |
185 | ||
a09fc446 | 186 | static int __init rd_start_early(char *p) |
1da177e4 | 187 | { |
a09fc446 | 188 | unsigned long start = memparse(p, &p); |
1da177e4 | 189 | |
875d43e7 | 190 | #ifdef CONFIG_64BIT |
a7837b76 FBH |
191 | /* Guess if the sign extension was forgotten by bootloader */ |
192 | if (start < XKPHYS) | |
193 | start = (int)start; | |
1da177e4 | 194 | #endif |
a09fc446 FBH |
195 | initrd_start = start; |
196 | initrd_end += start; | |
a09fc446 FBH |
197 | return 0; |
198 | } | |
199 | early_param("rd_start", rd_start_early); | |
200 | ||
201 | static int __init rd_size_early(char *p) | |
202 | { | |
203 | initrd_end += memparse(p, &p); | |
1da177e4 LT |
204 | return 0; |
205 | } | |
a09fc446 | 206 | early_param("rd_size", rd_size_early); |
1da177e4 | 207 | |
a7837b76 | 208 | /* it returns the next free pfn after initrd */ |
d2043ca8 FBH |
209 | static unsigned long __init init_initrd(void) |
210 | { | |
a7837b76 | 211 | unsigned long end; |
d2043ca8 | 212 | |
d2043ca8 | 213 | /* |
a09fc446 FBH |
214 | * Board specific code or command line parser should have |
215 | * already set up initrd_start and initrd_end. In these cases | |
216 | * perfom sanity checks and use them if all looks good. | |
d2043ca8 | 217 | */ |
32028f1f | 218 | if (!initrd_start || initrd_end <= initrd_start) |
a7837b76 | 219 | goto disable; |
a7837b76 | 220 | |
a7837b76 | 221 | if (initrd_start & ~PAGE_MASK) { |
a64ae7a2 | 222 | pr_err("initrd start must be page aligned\n"); |
a7837b76 | 223 | goto disable; |
d2043ca8 | 224 | } |
a7837b76 | 225 | if (initrd_start < PAGE_OFFSET) { |
a64ae7a2 | 226 | pr_err("initrd start < PAGE_OFFSET\n"); |
a7837b76 FBH |
227 | goto disable; |
228 | } | |
229 | ||
230 | /* | |
231 | * Sanitize initrd addresses. For example firmware | |
232 | * can't guess if they need to pass them through | |
233 | * 64-bits values if the kernel has been built in pure | |
234 | * 32-bit. We need also to switch from KSEG0 to XKPHYS | |
235 | * addresses now, so the code can now safely use __pa(). | |
236 | */ | |
237 | end = __pa(initrd_end); | |
238 | initrd_end = (unsigned long)__va(end); | |
239 | initrd_start = (unsigned long)__va(__pa(initrd_start)); | |
240 | ||
241 | ROOT_DEV = Root_RAM0; | |
242 | return PFN_UP(end); | |
243 | disable: | |
244 | initrd_start = 0; | |
245 | initrd_end = 0; | |
246 | return 0; | |
d2043ca8 FBH |
247 | } |
248 | ||
249 | static void __init finalize_initrd(void) | |
250 | { | |
251 | unsigned long size = initrd_end - initrd_start; | |
252 | ||
253 | if (size == 0) { | |
254 | printk(KERN_INFO "Initrd not found or empty"); | |
255 | goto disable; | |
256 | } | |
d4df6d4e | 257 | if (__pa(initrd_end) > PFN_PHYS(max_low_pfn)) { |
a64ae7a2 | 258 | printk(KERN_ERR "Initrd extends beyond end of memory"); |
d2043ca8 FBH |
259 | goto disable; |
260 | } | |
261 | ||
72a7fe39 | 262 | reserve_bootmem(__pa(initrd_start), size, BOOTMEM_DEFAULT); |
d2043ca8 FBH |
263 | initrd_below_start_ok = 1; |
264 | ||
a64ae7a2 MC |
265 | pr_info("Initial ramdisk at: 0x%lx (%lu bytes)\n", |
266 | initrd_start, size); | |
d2043ca8 FBH |
267 | return; |
268 | disable: | |
a64ae7a2 | 269 | printk(KERN_CONT " - disabling initrd\n"); |
d2043ca8 FBH |
270 | initrd_start = 0; |
271 | initrd_end = 0; | |
272 | } | |
273 | ||
274 | #else /* !CONFIG_BLK_DEV_INITRD */ | |
275 | ||
9ba126cf RB |
276 | static unsigned long __init init_initrd(void) |
277 | { | |
278 | return 0; | |
279 | } | |
280 | ||
d2043ca8 FBH |
281 | #define finalize_initrd() do {} while (0) |
282 | ||
283 | #endif | |
284 | ||
b6f1f0de FBH |
285 | /* |
286 | * Initialize the bootmem allocator. It also setup initrd related data | |
287 | * if needed. | |
288 | */ | |
c4617318 | 289 | #if defined(CONFIG_SGI_IP27) || (defined(CONFIG_CPU_LOONGSON3) && defined(CONFIG_NUMA)) |
d2043ca8 | 290 | |
b6f1f0de | 291 | static void __init bootmem_init(void) |
1da177e4 | 292 | { |
d2043ca8 FBH |
293 | init_initrd(); |
294 | finalize_initrd(); | |
295 | } | |
296 | ||
297 | #else /* !CONFIG_SGI_IP27 */ | |
298 | ||
299 | static void __init bootmem_init(void) | |
300 | { | |
e452e94e | 301 | unsigned long reserved_end; |
db84dc61 | 302 | unsigned long mapstart = ~0UL; |
1da177e4 LT |
303 | unsigned long bootmap_size; |
304 | int i; | |
1da177e4 LT |
305 | |
306 | /* | |
f9a7febd GU |
307 | * Sanity check any INITRD first. We don't take it into account |
308 | * for bootmem setup initially, rely on the end-of-kernel-code | |
309 | * as our memory range starting point. Once bootmem is inited we | |
310 | * will reserve the area used for the initrd. | |
1da177e4 | 311 | */ |
f9a7febd GU |
312 | init_initrd(); |
313 | reserved_end = (unsigned long) PFN_UP(__pa_symbol(&_end)); | |
1da177e4 | 314 | |
db84dc61 FBH |
315 | /* |
316 | * max_low_pfn is not a number of pages. The number of pages | |
317 | * of the system is given by 'max_low_pfn - min_low_pfn'. | |
318 | */ | |
319 | min_low_pfn = ~0UL; | |
320 | max_low_pfn = 0; | |
321 | ||
b6f1f0de FBH |
322 | /* |
323 | * Find the highest page frame number we have available. | |
324 | */ | |
1da177e4 LT |
325 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
326 | unsigned long start, end; | |
327 | ||
328 | if (boot_mem_map.map[i].type != BOOT_MEM_RAM) | |
329 | continue; | |
330 | ||
331 | start = PFN_UP(boot_mem_map.map[i].addr); | |
332 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
b6f1f0de | 333 | + boot_mem_map.map[i].size); |
1da177e4 | 334 | |
db84dc61 FBH |
335 | if (end > max_low_pfn) |
336 | max_low_pfn = end; | |
337 | if (start < min_low_pfn) | |
338 | min_low_pfn = start; | |
b6f1f0de | 339 | if (end <= reserved_end) |
1da177e4 | 340 | continue; |
a6335fa1 | 341 | #ifdef CONFIG_BLK_DEV_INITRD |
88d34269 | 342 | /* Skip zones before initrd and initrd itself */ |
a6335fa1 AS |
343 | if (initrd_end && end <= (unsigned long)PFN_UP(__pa(initrd_end))) |
344 | continue; | |
345 | #endif | |
b6f1f0de FBH |
346 | if (start >= mapstart) |
347 | continue; | |
348 | mapstart = max(reserved_end, start); | |
1da177e4 LT |
349 | } |
350 | ||
db84dc61 FBH |
351 | if (min_low_pfn >= max_low_pfn) |
352 | panic("Incorrect memory mapping !!!"); | |
6f284a2c | 353 | if (min_low_pfn > ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
354 | pr_info("Wasting %lu bytes for tracking %lu unused pages\n", |
355 | (min_low_pfn - ARCH_PFN_OFFSET) * sizeof(struct page), | |
356 | min_low_pfn - ARCH_PFN_OFFSET); | |
6f284a2c | 357 | } else if (min_low_pfn < ARCH_PFN_OFFSET) { |
a64ae7a2 MC |
358 | pr_info("%lu free pages won't be used\n", |
359 | ARCH_PFN_OFFSET - min_low_pfn); | |
db84dc61 | 360 | } |
6f284a2c | 361 | min_low_pfn = ARCH_PFN_OFFSET; |
db84dc61 | 362 | |
1da177e4 LT |
363 | /* |
364 | * Determine low and high memory ranges | |
365 | */ | |
dc3bf353 | 366 | max_pfn = max_low_pfn; |
db84dc61 | 367 | if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) { |
b6f1f0de FBH |
368 | #ifdef CONFIG_HIGHMEM |
369 | highstart_pfn = PFN_DOWN(HIGHMEM_START); | |
db84dc61 | 370 | highend_pfn = max_low_pfn; |
1da177e4 | 371 | #endif |
db84dc61 | 372 | max_low_pfn = PFN_DOWN(HIGHMEM_START); |
1da177e4 LT |
373 | } |
374 | ||
88d34269 AS |
375 | #ifdef CONFIG_BLK_DEV_INITRD |
376 | /* | |
377 | * mapstart should be after initrd_end | |
378 | */ | |
379 | if (initrd_end) | |
380 | mapstart = max(mapstart, (unsigned long)PFN_UP(__pa(initrd_end))); | |
381 | #endif | |
382 | ||
1da177e4 | 383 | /* |
b6f1f0de | 384 | * Initialize the boot-time allocator with low memory only. |
1da177e4 | 385 | */ |
db84dc61 FBH |
386 | bootmap_size = init_bootmem_node(NODE_DATA(0), mapstart, |
387 | min_low_pfn, max_low_pfn); | |
cce335ae RB |
388 | |
389 | ||
cce335ae RB |
390 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
391 | unsigned long start, end; | |
392 | ||
393 | start = PFN_UP(boot_mem_map.map[i].addr); | |
394 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
395 | + boot_mem_map.map[i].size); | |
396 | ||
e452e94e AN |
397 | if (start <= min_low_pfn) |
398 | start = min_low_pfn; | |
cce335ae RB |
399 | if (start >= end) |
400 | continue; | |
401 | ||
402 | #ifndef CONFIG_HIGHMEM | |
403 | if (end > max_low_pfn) | |
404 | end = max_low_pfn; | |
405 | ||
406 | /* | |
407 | * ... finally, is the area going away? | |
408 | */ | |
409 | if (end <= start) | |
410 | continue; | |
411 | #endif | |
412 | ||
9d15ffc8 | 413 | memblock_add_node(PFN_PHYS(start), PFN_PHYS(end - start), 0); |
cce335ae RB |
414 | } |
415 | ||
1da177e4 LT |
416 | /* |
417 | * Register fully available low RAM pages with the bootmem allocator. | |
418 | */ | |
419 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
b6f1f0de | 420 | unsigned long start, end, size; |
1da177e4 | 421 | |
43064c0c DD |
422 | start = PFN_UP(boot_mem_map.map[i].addr); |
423 | end = PFN_DOWN(boot_mem_map.map[i].addr | |
424 | + boot_mem_map.map[i].size); | |
425 | ||
1da177e4 LT |
426 | /* |
427 | * Reserve usable memory. | |
428 | */ | |
43064c0c DD |
429 | switch (boot_mem_map.map[i].type) { |
430 | case BOOT_MEM_RAM: | |
431 | break; | |
432 | case BOOT_MEM_INIT_RAM: | |
433 | memory_present(0, start, end); | |
1da177e4 | 434 | continue; |
43064c0c DD |
435 | default: |
436 | /* Not usable memory */ | |
437 | continue; | |
438 | } | |
1da177e4 | 439 | |
1da177e4 | 440 | /* |
b6f1f0de FBH |
441 | * We are rounding up the start address of usable memory |
442 | * and at the end of the usable range downwards. | |
1da177e4 | 443 | */ |
b6f1f0de | 444 | if (start >= max_low_pfn) |
1da177e4 | 445 | continue; |
b6f1f0de FBH |
446 | if (start < reserved_end) |
447 | start = reserved_end; | |
448 | if (end > max_low_pfn) | |
449 | end = max_low_pfn; | |
1da177e4 LT |
450 | |
451 | /* | |
b6f1f0de | 452 | * ... finally, is the area going away? |
1da177e4 | 453 | */ |
b6f1f0de | 454 | if (end <= start) |
1da177e4 | 455 | continue; |
b6f1f0de | 456 | size = end - start; |
1da177e4 LT |
457 | |
458 | /* Register lowmem ranges */ | |
b6f1f0de FBH |
459 | free_bootmem(PFN_PHYS(start), size << PAGE_SHIFT); |
460 | memory_present(0, start, end); | |
1da177e4 LT |
461 | } |
462 | ||
b6f1f0de FBH |
463 | /* |
464 | * Reserve the bootmap memory. | |
465 | */ | |
72a7fe39 | 466 | reserve_bootmem(PFN_PHYS(mapstart), bootmap_size, BOOTMEM_DEFAULT); |
b6f1f0de | 467 | |
d2043ca8 FBH |
468 | /* |
469 | * Reserve initrd memory if needed. | |
470 | */ | |
471 | finalize_initrd(); | |
1da177e4 LT |
472 | } |
473 | ||
d2043ca8 FBH |
474 | #endif /* CONFIG_SGI_IP27 */ |
475 | ||
2925aba4 | 476 | /* |
603e82ed | 477 | * arch_mem_init - initialize memory management subsystem |
2925aba4 RB |
478 | * |
479 | * o plat_mem_setup() detects the memory configuration and will record detected | |
480 | * memory areas using add_memory_region. | |
2925aba4 RB |
481 | * |
482 | * At this stage the memory configuration of the system is known to the | |
603e82ed | 483 | * kernel but generic memory management system is still entirely uninitialized. |
2925aba4 RB |
484 | * |
485 | * o bootmem_init() | |
486 | * o sparse_init() | |
487 | * o paging_init() | |
e1c05067 | 488 | * o dma_contiguous_reserve() |
2925aba4 RB |
489 | * |
490 | * At this stage the bootmem allocator is ready to use. | |
491 | * | |
492 | * NOTE: historically plat_mem_setup did the entire platform initialization. | |
70342287 | 493 | * This was rather impractical because it meant plat_mem_setup had to |
2925aba4 | 494 | * get away without any kind of memory allocator. To keep old code from |
7f0dd768 | 495 | * breaking plat_setup was just renamed to plat_mem_setup and a second platform |
2925aba4 RB |
496 | * initialization hook for anything else was introduced. |
497 | */ | |
498 | ||
982f6ffe | 499 | static int usermem __initdata; |
a09fc446 FBH |
500 | |
501 | static int __init early_parse_mem(char *p) | |
502 | { | |
ad8f723a | 503 | phys_addr_t start, size; |
a09fc446 FBH |
504 | |
505 | /* | |
506 | * If a user specifies memory size, we | |
507 | * blow away any automatically generated | |
508 | * size. | |
509 | */ | |
510 | if (usermem == 0) { | |
511 | boot_mem_map.nr_map = 0; | |
512 | usermem = 1; | |
70342287 | 513 | } |
a09fc446 FBH |
514 | start = 0; |
515 | size = memparse(p, &p); | |
516 | if (*p == '@') | |
517 | start = memparse(p + 1, &p); | |
518 | ||
519 | add_memory_region(start, size, BOOT_MEM_RAM); | |
520 | return 0; | |
521 | } | |
522 | early_param("mem", early_parse_mem); | |
2925aba4 | 523 | |
4893fc88 CM |
524 | #ifdef CONFIG_PROC_VMCORE |
525 | unsigned long setup_elfcorehdr, setup_elfcorehdr_size; | |
526 | static int __init early_parse_elfcorehdr(char *p) | |
527 | { | |
528 | int i; | |
529 | ||
530 | setup_elfcorehdr = memparse(p, &p); | |
531 | ||
532 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
533 | unsigned long start = boot_mem_map.map[i].addr; | |
534 | unsigned long end = (boot_mem_map.map[i].addr + | |
535 | boot_mem_map.map[i].size); | |
536 | if (setup_elfcorehdr >= start && setup_elfcorehdr < end) { | |
537 | /* | |
538 | * Reserve from the elf core header to the end of | |
539 | * the memory segment, that should all be kdump | |
540 | * reserved memory. | |
541 | */ | |
542 | setup_elfcorehdr_size = end - setup_elfcorehdr; | |
543 | break; | |
544 | } | |
545 | } | |
546 | /* | |
547 | * If we don't find it in the memory map, then we shouldn't | |
548 | * have to worry about it, as the new kernel won't use it. | |
549 | */ | |
550 | return 0; | |
551 | } | |
552 | early_param("elfcorehdr", early_parse_elfcorehdr); | |
553 | #endif | |
554 | ||
15d45cce | 555 | static void __init arch_mem_addpart(phys_addr_t mem, phys_addr_t end, int type) |
2925aba4 | 556 | { |
15d45cce | 557 | phys_addr_t size; |
d3ff9338 | 558 | int i; |
43064c0c | 559 | |
d3ff9338 CM |
560 | size = end - mem; |
561 | if (!size) | |
562 | return; | |
563 | ||
564 | /* Make sure it is in the boot_mem_map */ | |
565 | for (i = 0; i < boot_mem_map.nr_map; i++) { | |
566 | if (mem >= boot_mem_map.map[i].addr && | |
567 | mem < (boot_mem_map.map[i].addr + | |
568 | boot_mem_map.map[i].size)) | |
569 | return; | |
570 | } | |
571 | add_memory_region(mem, size, type); | |
572 | } | |
43064c0c | 573 | |
c2882b7f PM |
574 | #ifdef CONFIG_KEXEC |
575 | static inline unsigned long long get_total_mem(void) | |
576 | { | |
577 | unsigned long long total; | |
578 | ||
579 | total = max_pfn - min_low_pfn; | |
580 | return total << PAGE_SHIFT; | |
581 | } | |
582 | ||
583 | static void __init mips_parse_crashkernel(void) | |
584 | { | |
585 | unsigned long long total_mem; | |
586 | unsigned long long crash_size, crash_base; | |
587 | int ret; | |
588 | ||
589 | total_mem = get_total_mem(); | |
590 | ret = parse_crashkernel(boot_command_line, total_mem, | |
591 | &crash_size, &crash_base); | |
592 | if (ret != 0 || crash_size <= 0) | |
593 | return; | |
594 | ||
595 | crashk_res.start = crash_base; | |
596 | crashk_res.end = crash_base + crash_size - 1; | |
597 | } | |
598 | ||
599 | static void __init request_crashkernel(struct resource *res) | |
600 | { | |
601 | int ret; | |
602 | ||
603 | ret = request_resource(res, &crashk_res); | |
604 | if (!ret) | |
605 | pr_info("Reserving %ldMB of memory at %ldMB for crashkernel\n", | |
606 | (unsigned long)((crashk_res.end - | |
607 | crashk_res.start + 1) >> 20), | |
608 | (unsigned long)(crashk_res.start >> 20)); | |
609 | } | |
610 | #else /* !defined(CONFIG_KEXEC) */ | |
611 | static void __init mips_parse_crashkernel(void) | |
612 | { | |
613 | } | |
614 | ||
615 | static void __init request_crashkernel(struct resource *res) | |
616 | { | |
617 | } | |
618 | #endif /* !defined(CONFIG_KEXEC) */ | |
619 | ||
2024972e JG |
620 | #define USE_PROM_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_BOOTLOADER) |
621 | #define USE_DTB_CMDLINE IS_ENABLED(CONFIG_MIPS_CMDLINE_FROM_DTB) | |
622 | #define EXTEND_WITH_PROM IS_ENABLED(CONFIG_MIPS_CMDLINE_EXTEND) | |
623 | ||
d3ff9338 CM |
624 | static void __init arch_mem_init(char **cmdline_p) |
625 | { | |
f4649382 | 626 | struct memblock_region *reg; |
a09fc446 FBH |
627 | extern void plat_mem_setup(void); |
628 | ||
2925aba4 RB |
629 | /* call board setup routine */ |
630 | plat_mem_setup(); | |
631 | ||
d3ff9338 CM |
632 | /* |
633 | * Make sure all kernel memory is in the maps. The "UP" and | |
634 | * "DOWN" are opposite for initdata since if it crosses over | |
635 | * into another memory section you don't want that to be | |
636 | * freed when the initdata is freed. | |
637 | */ | |
638 | arch_mem_addpart(PFN_DOWN(__pa_symbol(&_text)) << PAGE_SHIFT, | |
639 | PFN_UP(__pa_symbol(&_edata)) << PAGE_SHIFT, | |
640 | BOOT_MEM_RAM); | |
641 | arch_mem_addpart(PFN_UP(__pa_symbol(&__init_begin)) << PAGE_SHIFT, | |
642 | PFN_DOWN(__pa_symbol(&__init_end)) << PAGE_SHIFT, | |
643 | BOOT_MEM_INIT_RAM); | |
43064c0c | 644 | |
a64ae7a2 | 645 | pr_info("Determined physical RAM map:\n"); |
a09fc446 FBH |
646 | print_memory_map(); |
647 | ||
2024972e | 648 | #if defined(CONFIG_CMDLINE_BOOL) && defined(CONFIG_CMDLINE_OVERRIDE) |
6acc7d48 DV |
649 | strlcpy(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); |
650 | #else | |
2024972e JG |
651 | if ((USE_PROM_CMDLINE && arcs_cmdline[0]) || |
652 | (USE_DTB_CMDLINE && !boot_command_line[0])) | |
653 | strlcpy(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
654 | ||
655 | if (EXTEND_WITH_PROM && arcs_cmdline[0]) { | |
656 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); | |
657 | strlcat(boot_command_line, arcs_cmdline, COMMAND_LINE_SIZE); | |
658 | } | |
659 | ||
660 | #if defined(CONFIG_CMDLINE_BOOL) | |
6acc7d48 | 661 | if (builtin_cmdline[0]) { |
2024972e JG |
662 | strlcat(boot_command_line, " ", COMMAND_LINE_SIZE); |
663 | strlcat(boot_command_line, builtin_cmdline, COMMAND_LINE_SIZE); | |
6acc7d48 | 664 | } |
6acc7d48 | 665 | #endif |
6acc7d48 DV |
666 | #endif |
667 | strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE); | |
2925aba4 RB |
668 | |
669 | *cmdline_p = command_line; | |
670 | ||
a09fc446 FBH |
671 | parse_early_param(); |
672 | ||
673 | if (usermem) { | |
a64ae7a2 | 674 | pr_info("User-defined physical RAM map:\n"); |
a09fc446 FBH |
675 | print_memory_map(); |
676 | } | |
677 | ||
2925aba4 | 678 | bootmem_init(); |
4893fc88 CM |
679 | #ifdef CONFIG_PROC_VMCORE |
680 | if (setup_elfcorehdr && setup_elfcorehdr_size) { | |
681 | printk(KERN_INFO "kdump reserved memory at %lx-%lx\n", | |
682 | setup_elfcorehdr, setup_elfcorehdr_size); | |
683 | reserve_bootmem(setup_elfcorehdr, setup_elfcorehdr_size, | |
684 | BOOTMEM_DEFAULT); | |
685 | } | |
686 | #endif | |
c2882b7f PM |
687 | |
688 | mips_parse_crashkernel(); | |
7aa1c8f4 RB |
689 | #ifdef CONFIG_KEXEC |
690 | if (crashk_res.start != crashk_res.end) | |
691 | reserve_bootmem(crashk_res.start, | |
692 | crashk_res.end - crashk_res.start + 1, | |
693 | BOOTMEM_DEFAULT); | |
694 | #endif | |
f2ffa5ab | 695 | device_tree_init(); |
2925aba4 | 696 | sparse_init(); |
ee71b7d2 | 697 | plat_swiotlb_setup(); |
2925aba4 | 698 | paging_init(); |
f4649382 ZLK |
699 | |
700 | dma_contiguous_reserve(PFN_PHYS(max_low_pfn)); | |
701 | /* Tell bootmem about cma reserved memblock section */ | |
702 | for_each_memblock(reserved, reg) | |
30fa0530 ZLK |
703 | if (reg->size != 0) |
704 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
2925aba4 RB |
705 | } |
706 | ||
8df32c63 | 707 | static void __init resource_init(void) |
1da177e4 LT |
708 | { |
709 | int i; | |
710 | ||
6adb5fe7 RB |
711 | if (UNCAC_BASE != IO_BASE) |
712 | return; | |
713 | ||
f5bffe3a FBH |
714 | code_resource.start = __pa_symbol(&_text); |
715 | code_resource.end = __pa_symbol(&_etext) - 1; | |
716 | data_resource.start = __pa_symbol(&_etext); | |
717 | data_resource.end = __pa_symbol(&_edata) - 1; | |
1da177e4 | 718 | |
1da177e4 LT |
719 | for (i = 0; i < boot_mem_map.nr_map; i++) { |
720 | struct resource *res; | |
721 | unsigned long start, end; | |
722 | ||
723 | start = boot_mem_map.map[i].addr; | |
724 | end = boot_mem_map.map[i].addr + boot_mem_map.map[i].size - 1; | |
1c6fd44d | 725 | if (start >= HIGHMEM_START) |
1da177e4 | 726 | continue; |
1c6fd44d FBH |
727 | if (end >= HIGHMEM_START) |
728 | end = HIGHMEM_START - 1; | |
1da177e4 LT |
729 | |
730 | res = alloc_bootmem(sizeof(struct resource)); | |
731 | switch (boot_mem_map.map[i].type) { | |
732 | case BOOT_MEM_RAM: | |
43064c0c | 733 | case BOOT_MEM_INIT_RAM: |
1da177e4 LT |
734 | case BOOT_MEM_ROM_DATA: |
735 | res->name = "System RAM"; | |
736 | break; | |
737 | case BOOT_MEM_RESERVED: | |
738 | default: | |
739 | res->name = "reserved"; | |
740 | } | |
741 | ||
742 | res->start = start; | |
743 | res->end = end; | |
744 | ||
745 | res->flags = IORESOURCE_MEM | IORESOURCE_BUSY; | |
746 | request_resource(&iomem_resource, res); | |
747 | ||
748 | /* | |
749 | * We don't know which RAM region contains kernel data, | |
750 | * so we try it repeatedly and let the resource manager | |
751 | * test it. | |
752 | */ | |
753 | request_resource(res, &code_resource); | |
754 | request_resource(res, &data_resource); | |
7aa1c8f4 | 755 | request_crashkernel(res); |
1da177e4 LT |
756 | } |
757 | } | |
758 | ||
0f3f506b HC |
759 | #ifdef CONFIG_SMP |
760 | static void __init prefill_possible_map(void) | |
761 | { | |
762 | int i, possible = num_possible_cpus(); | |
763 | ||
764 | if (possible > nr_cpu_ids) | |
765 | possible = nr_cpu_ids; | |
766 | ||
767 | for (i = 0; i < possible; i++) | |
768 | set_cpu_possible(i, true); | |
769 | for (; i < NR_CPUS; i++) | |
770 | set_cpu_possible(i, false); | |
771 | ||
772 | nr_cpu_ids = possible; | |
773 | } | |
774 | #else | |
775 | static inline void prefill_possible_map(void) {} | |
776 | #endif | |
777 | ||
1da177e4 LT |
778 | void __init setup_arch(char **cmdline_p) |
779 | { | |
780 | cpu_probe(); | |
781 | prom_init(); | |
36a88530 | 782 | |
e934945d | 783 | setup_early_fdc_console(); |
36a88530 | 784 | #ifdef CONFIG_EARLY_PRINTK |
07cdb784 | 785 | setup_early_printk(); |
36a88530 | 786 | #endif |
1da177e4 | 787 | cpu_report(); |
20d60d99 | 788 | check_bugs_early(); |
1da177e4 LT |
789 | |
790 | #if defined(CONFIG_VT) | |
791 | #if defined(CONFIG_VGA_CONSOLE) | |
e0daad44 | 792 | conswitchp = &vga_con; |
1da177e4 | 793 | #elif defined(CONFIG_DUMMY_CONSOLE) |
e0daad44 | 794 | conswitchp = &dummy_con; |
1da177e4 LT |
795 | #endif |
796 | #endif | |
797 | ||
2925aba4 | 798 | arch_mem_init(cmdline_p); |
1da177e4 | 799 | |
1da177e4 | 800 | resource_init(); |
9b6695a8 | 801 | plat_smp_setup(); |
0f3f506b | 802 | prefill_possible_map(); |
6650df3c DD |
803 | |
804 | cpu_cache_init(); | |
1da177e4 LT |
805 | } |
806 | ||
69a6c312 AN |
807 | unsigned long kernelsp[NR_CPUS]; |
808 | unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3; | |
6312e0ee AN |
809 | |
810 | #ifdef CONFIG_DEBUG_FS | |
811 | struct dentry *mips_debugfs_dir; | |
812 | static int __init debugfs_mips(void) | |
813 | { | |
814 | struct dentry *d; | |
815 | ||
816 | d = debugfs_create_dir("mips", NULL); | |
b517531c Z |
817 | if (!d) |
818 | return -ENOMEM; | |
6312e0ee AN |
819 | mips_debugfs_dir = d; |
820 | return 0; | |
821 | } | |
822 | arch_initcall(debugfs_mips); | |
823 | #endif |