Commit | Line | Data |
---|---|---|
01066625 PM |
1 | /* |
2 | * linux/arch/sh/mm/init.c | |
1da177e4 LT |
3 | * |
4 | * Copyright (C) 1999 Niibe Yutaka | |
2f599861 | 5 | * Copyright (C) 2002 - 2011 Paul Mundt |
1da177e4 LT |
6 | * |
7 | * Based on linux/arch/i386/mm/init.c: | |
8 | * Copyright (C) 1995 Linus Torvalds | |
9 | */ | |
1da177e4 LT |
10 | #include <linux/mm.h> |
11 | #include <linux/swap.h> | |
1da177e4 | 12 | #include <linux/init.h> |
5a0e3ad6 | 13 | #include <linux/gfp.h> |
1da177e4 | 14 | #include <linux/bootmem.h> |
2cb7ce3b | 15 | #include <linux/proc_fs.h> |
27641dee | 16 | #include <linux/pagemap.h> |
01066625 PM |
17 | #include <linux/percpu.h> |
18 | #include <linux/io.h> | |
95f72d1e | 19 | #include <linux/memblock.h> |
94c28510 | 20 | #include <linux/dma-mapping.h> |
1da177e4 | 21 | #include <asm/mmu_context.h> |
4bc277ac | 22 | #include <asm/mmzone.h> |
c77b29db | 23 | #include <asm/kexec.h> |
1da177e4 LT |
24 | #include <asm/tlb.h> |
25 | #include <asm/cacheflush.h> | |
07cbb41b | 26 | #include <asm/sections.h> |
4bc277ac | 27 | #include <asm/setup.h> |
1da177e4 | 28 | #include <asm/cache.h> |
b0f3ae03 | 29 | #include <asm/sizes.h> |
1da177e4 | 30 | |
1da177e4 | 31 | pgd_t swapper_pg_dir[PTRS_PER_PGD]; |
c6feb614 | 32 | |
19d8f84f PM |
33 | void __init generic_mem_init(void) |
34 | { | |
95f72d1e | 35 | memblock_add(__MEMORY_START, __MEMORY_SIZE); |
19d8f84f PM |
36 | } |
37 | ||
4bc277ac PM |
38 | void __init __weak plat_mem_setup(void) |
39 | { | |
40 | /* Nothing to see here, move along. */ | |
41 | } | |
42 | ||
11cbb70e | 43 | #ifdef CONFIG_MMU |
07cad4dc | 44 | static pte_t *__get_pte_phys(unsigned long addr) |
1da177e4 LT |
45 | { |
46 | pgd_t *pgd; | |
26ff6c11 | 47 | pud_t *pud; |
1da177e4 | 48 | pmd_t *pmd; |
1da177e4 | 49 | |
99a596f9 | 50 | pgd = pgd_offset_k(addr); |
1da177e4 LT |
51 | if (pgd_none(*pgd)) { |
52 | pgd_ERROR(*pgd); | |
07cad4dc | 53 | return NULL; |
1da177e4 LT |
54 | } |
55 | ||
99a596f9 SM |
56 | pud = pud_alloc(NULL, pgd, addr); |
57 | if (unlikely(!pud)) { | |
58 | pud_ERROR(*pud); | |
07cad4dc | 59 | return NULL; |
26ff6c11 PM |
60 | } |
61 | ||
99a596f9 SM |
62 | pmd = pmd_alloc(NULL, pud, addr); |
63 | if (unlikely(!pmd)) { | |
64 | pmd_ERROR(*pmd); | |
07cad4dc | 65 | return NULL; |
1da177e4 LT |
66 | } |
67 | ||
598ee698 | 68 | return pte_offset_kernel(pmd, addr); |
07cad4dc MF |
69 | } |
70 | ||
71 | static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot) | |
72 | { | |
73 | pte_t *pte; | |
74 | ||
75 | pte = __get_pte_phys(addr); | |
1da177e4 LT |
76 | if (!pte_none(*pte)) { |
77 | pte_ERROR(*pte); | |
78 | return; | |
79 | } | |
80 | ||
81 | set_pte(pte, pfn_pte(phys >> PAGE_SHIFT, prot)); | |
997d0030 | 82 | local_flush_tlb_one(get_asid(), addr); |
07cad4dc MF |
83 | |
84 | if (pgprot_val(prot) & _PAGE_WIRED) | |
85 | tlb_wire_entry(NULL, addr, *pte); | |
86 | } | |
87 | ||
88 | static void clear_pte_phys(unsigned long addr, pgprot_t prot) | |
89 | { | |
90 | pte_t *pte; | |
91 | ||
92 | pte = __get_pte_phys(addr); | |
93 | ||
94 | if (pgprot_val(prot) & _PAGE_WIRED) | |
95 | tlb_unwire_entry(); | |
96 | ||
97 | set_pte(pte, pfn_pte(0, __pgprot(0))); | |
98 | local_flush_tlb_one(get_asid(), addr); | |
1da177e4 LT |
99 | } |
100 | ||
1da177e4 LT |
101 | void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot) |
102 | { | |
103 | unsigned long address = __fix_to_virt(idx); | |
104 | ||
105 | if (idx >= __end_of_fixed_addresses) { | |
106 | BUG(); | |
107 | return; | |
108 | } | |
109 | ||
110 | set_pte_phys(address, phys, prot); | |
111 | } | |
2adb4e10 | 112 | |
07cad4dc MF |
113 | void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot) |
114 | { | |
115 | unsigned long address = __fix_to_virt(idx); | |
116 | ||
117 | if (idx >= __end_of_fixed_addresses) { | |
118 | BUG(); | |
119 | return; | |
120 | } | |
121 | ||
122 | clear_pte_phys(address, prot); | |
123 | } | |
124 | ||
598ee698 PM |
125 | static pmd_t * __init one_md_table_init(pud_t *pud) |
126 | { | |
127 | if (pud_none(*pud)) { | |
128 | pmd_t *pmd; | |
129 | ||
130 | pmd = alloc_bootmem_pages(PAGE_SIZE); | |
131 | pud_populate(&init_mm, pud, pmd); | |
132 | BUG_ON(pmd != pmd_offset(pud, 0)); | |
133 | } | |
134 | ||
135 | return pmd_offset(pud, 0); | |
136 | } | |
137 | ||
138 | static pte_t * __init one_page_table_init(pmd_t *pmd) | |
139 | { | |
140 | if (pmd_none(*pmd)) { | |
141 | pte_t *pte; | |
142 | ||
143 | pte = alloc_bootmem_pages(PAGE_SIZE); | |
144 | pmd_populate_kernel(&init_mm, pmd, pte); | |
145 | BUG_ON(pte != pte_offset_kernel(pmd, 0)); | |
146 | } | |
147 | ||
148 | return pte_offset_kernel(pmd, 0); | |
149 | } | |
150 | ||
151 | static pte_t * __init page_table_kmap_check(pte_t *pte, pmd_t *pmd, | |
152 | unsigned long vaddr, pte_t *lastpte) | |
153 | { | |
154 | return pte; | |
155 | } | |
156 | ||
2adb4e10 SM |
157 | void __init page_table_range_init(unsigned long start, unsigned long end, |
158 | pgd_t *pgd_base) | |
159 | { | |
160 | pgd_t *pgd; | |
161 | pud_t *pud; | |
162 | pmd_t *pmd; | |
598ee698 | 163 | pte_t *pte = NULL; |
0906a3ad | 164 | int i, j, k; |
2adb4e10 SM |
165 | unsigned long vaddr; |
166 | ||
0906a3ad PM |
167 | vaddr = start; |
168 | i = __pgd_offset(vaddr); | |
169 | j = __pud_offset(vaddr); | |
170 | k = __pmd_offset(vaddr); | |
171 | pgd = pgd_base + i; | |
172 | ||
173 | for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) { | |
174 | pud = (pud_t *)pgd; | |
175 | for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) { | |
598ee698 PM |
176 | pmd = one_md_table_init(pud); |
177 | #ifndef __PAGETABLE_PMD_FOLDED | |
5d9b4b19 MF |
178 | pmd += k; |
179 | #endif | |
0906a3ad | 180 | for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) { |
598ee698 PM |
181 | pte = page_table_kmap_check(one_page_table_init(pmd), |
182 | pmd, vaddr, pte); | |
0906a3ad PM |
183 | vaddr += PMD_SIZE; |
184 | } | |
185 | k = 0; | |
2adb4e10 | 186 | } |
0906a3ad | 187 | j = 0; |
2adb4e10 SM |
188 | } |
189 | } | |
11cbb70e | 190 | #endif /* CONFIG_MMU */ |
1da177e4 | 191 | |
4bc277ac PM |
192 | void __init allocate_pgdat(unsigned int nid) |
193 | { | |
194 | unsigned long start_pfn, end_pfn; | |
195 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
196 | unsigned long phys; | |
197 | #endif | |
198 | ||
199 | get_pfn_range_for_nid(nid, &start_pfn, &end_pfn); | |
200 | ||
201 | #ifdef CONFIG_NEED_MULTIPLE_NODES | |
95f72d1e | 202 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
4bc277ac PM |
203 | SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT); |
204 | /* Retry with all of system memory */ | |
205 | if (!phys) | |
95f72d1e YL |
206 | phys = __memblock_alloc_base(sizeof(struct pglist_data), |
207 | SMP_CACHE_BYTES, memblock_end_of_DRAM()); | |
4bc277ac PM |
208 | if (!phys) |
209 | panic("Can't allocate pgdat for node %d\n", nid); | |
210 | ||
211 | NODE_DATA(nid) = __va(phys); | |
212 | memset(NODE_DATA(nid), 0, sizeof(struct pglist_data)); | |
213 | ||
214 | NODE_DATA(nid)->bdata = &bootmem_node_data[nid]; | |
215 | #endif | |
216 | ||
217 | NODE_DATA(nid)->node_start_pfn = start_pfn; | |
218 | NODE_DATA(nid)->node_spanned_pages = end_pfn - start_pfn; | |
219 | } | |
220 | ||
221 | static void __init bootmem_init_one_node(unsigned int nid) | |
222 | { | |
223 | unsigned long total_pages, paddr; | |
224 | unsigned long end_pfn; | |
225 | struct pglist_data *p; | |
4bc277ac PM |
226 | |
227 | p = NODE_DATA(nid); | |
228 | ||
229 | /* Nothing to do.. */ | |
230 | if (!p->node_spanned_pages) | |
231 | return; | |
232 | ||
233 | end_pfn = p->node_start_pfn + p->node_spanned_pages; | |
234 | ||
235 | total_pages = bootmem_bootmap_pages(p->node_spanned_pages); | |
236 | ||
95f72d1e | 237 | paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE); |
4bc277ac PM |
238 | if (!paddr) |
239 | panic("Can't allocate bootmap for nid[%d]\n", nid); | |
240 | ||
241 | init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn); | |
242 | ||
243 | free_bootmem_with_active_regions(nid, end_pfn); | |
244 | ||
245 | /* | |
246 | * XXX Handle initial reservations for the system memory node | |
247 | * only for the moment, we'll refactor this later for handling | |
248 | * reservations in other nodes. | |
249 | */ | |
250 | if (nid == 0) { | |
64106ca6 BH |
251 | struct memblock_region *reg; |
252 | ||
4bc277ac | 253 | /* Reserve the sections we're already using. */ |
64106ca6 BH |
254 | for_each_memblock(reserved, reg) { |
255 | reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT); | |
256 | } | |
4bc277ac PM |
257 | } |
258 | ||
259 | sparse_memory_present_with_active_regions(nid); | |
260 | } | |
261 | ||
262 | static void __init do_init_bootmem(void) | |
263 | { | |
64106ca6 | 264 | struct memblock_region *reg; |
4bc277ac PM |
265 | int i; |
266 | ||
267 | /* Add active regions with valid PFNs. */ | |
64106ca6 | 268 | for_each_memblock(memory, reg) { |
4bc277ac | 269 | unsigned long start_pfn, end_pfn; |
c7fc2de0 YL |
270 | start_pfn = memblock_region_memory_base_pfn(reg); |
271 | end_pfn = memblock_region_memory_end_pfn(reg); | |
4bc277ac PM |
272 | __add_active_range(0, start_pfn, end_pfn); |
273 | } | |
274 | ||
275 | /* All of system RAM sits in node 0 for the non-NUMA case */ | |
276 | allocate_pgdat(0); | |
277 | node_set_online(0); | |
278 | ||
279 | plat_mem_setup(); | |
280 | ||
281 | for_each_online_node(i) | |
282 | bootmem_init_one_node(i); | |
283 | ||
284 | sparse_init(); | |
285 | } | |
286 | ||
287 | static void __init early_reserve_mem(void) | |
288 | { | |
289 | unsigned long start_pfn; | |
290 | ||
291 | /* | |
292 | * Partially used pages are not usable - thus | |
293 | * we are rounding upwards: | |
294 | */ | |
295 | start_pfn = PFN_UP(__pa(_end)); | |
296 | ||
297 | /* | |
298 | * Reserve the kernel text and Reserve the bootmem bitmap. We do | |
299 | * this in two steps (first step was init_bootmem()), because | |
300 | * this catches the (definitely buggy) case of us accidentally | |
301 | * initializing the bootmem allocator with an invalid RAM area. | |
302 | */ | |
95f72d1e | 303 | memblock_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET, |
4bc277ac PM |
304 | (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) - |
305 | (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET)); | |
306 | ||
307 | /* | |
308 | * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET. | |
309 | */ | |
310 | if (CONFIG_ZERO_PAGE_OFFSET != 0) | |
95f72d1e | 311 | memblock_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET); |
4bc277ac PM |
312 | |
313 | /* | |
314 | * Handle additional early reservations | |
315 | */ | |
316 | check_for_initrd(); | |
317 | reserve_crashkernel(); | |
318 | } | |
319 | ||
1da177e4 LT |
320 | void __init paging_init(void) |
321 | { | |
2de212eb | 322 | unsigned long max_zone_pfns[MAX_NR_ZONES]; |
0906a3ad | 323 | unsigned long vaddr, end; |
01066625 | 324 | int nid; |
1da177e4 | 325 | |
95f72d1e | 326 | memblock_init(); |
4bc277ac PM |
327 | sh_mv.mv_mem_init(); |
328 | ||
329 | early_reserve_mem(); | |
330 | ||
2f599861 PM |
331 | /* |
332 | * Once the early reservations are out of the way, give the | |
333 | * platforms a chance to kick out some memory. | |
334 | */ | |
335 | if (sh_mv.mv_mem_reserve) | |
336 | sh_mv.mv_mem_reserve(); | |
337 | ||
95f72d1e YL |
338 | memblock_enforce_memory_limit(memory_limit); |
339 | memblock_analyze(); | |
4bc277ac | 340 | |
95f72d1e | 341 | memblock_dump_all(); |
4bc277ac PM |
342 | |
343 | /* | |
344 | * Determine low and high memory ranges: | |
345 | */ | |
95f72d1e | 346 | max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT; |
4bc277ac PM |
347 | min_low_pfn = __MEMORY_START >> PAGE_SHIFT; |
348 | ||
349 | nodes_clear(node_online_map); | |
350 | ||
351 | memory_start = (unsigned long)__va(__MEMORY_START); | |
95f72d1e | 352 | memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size()); |
4bc277ac PM |
353 | |
354 | uncached_init(); | |
355 | pmb_init(); | |
356 | do_init_bootmem(); | |
357 | ioremap_fixed_init(); | |
358 | ||
01066625 PM |
359 | /* We don't need to map the kernel through the TLB, as |
360 | * it is permanatly mapped using P1. So clear the | |
361 | * entire pgd. */ | |
362 | memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); | |
1da177e4 | 363 | |
6e4662ff SM |
364 | /* Set an initial value for the MMU.TTB so we don't have to |
365 | * check for a null value. */ | |
366 | set_TTB(swapper_pg_dir); | |
367 | ||
acca4f4d PM |
368 | /* |
369 | * Populate the relevant portions of swapper_pg_dir so that | |
2adb4e10 | 370 | * we can use the fixmap entries without calling kmalloc. |
acca4f4d PM |
371 | * pte's will be filled in by __set_fixmap(). |
372 | */ | |
373 | vaddr = __fix_to_virt(__end_of_fixed_addresses - 1) & PMD_MASK; | |
0906a3ad PM |
374 | end = (FIXADDR_TOP + PMD_SIZE - 1) & PMD_MASK; |
375 | page_table_range_init(vaddr, end, swapper_pg_dir); | |
acca4f4d PM |
376 | |
377 | kmap_coherent_init(); | |
2adb4e10 | 378 | |
2de212eb PM |
379 | memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); |
380 | ||
01066625 PM |
381 | for_each_online_node(nid) { |
382 | pg_data_t *pgdat = NODE_DATA(nid); | |
01066625 PM |
383 | unsigned long low, start_pfn; |
384 | ||
3560e249 | 385 | start_pfn = pgdat->bdata->node_min_pfn; |
01066625 PM |
386 | low = pgdat->bdata->node_low_pfn; |
387 | ||
2de212eb PM |
388 | if (max_zone_pfns[ZONE_NORMAL] < low) |
389 | max_zone_pfns[ZONE_NORMAL] = low; | |
01066625 PM |
390 | |
391 | printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", | |
392 | nid, start_pfn, low); | |
01066625 | 393 | } |
2de212eb PM |
394 | |
395 | free_area_init_nodes(max_zone_pfns); | |
1da177e4 LT |
396 | } |
397 | ||
94c28510 PM |
398 | /* |
399 | * Early initialization for any I/O MMUs we might have. | |
400 | */ | |
401 | static void __init iommu_init(void) | |
402 | { | |
403 | no_iommu_init(); | |
404 | } | |
405 | ||
d9b9487a PM |
406 | unsigned int mem_init_done = 0; |
407 | ||
1da177e4 LT |
408 | void __init mem_init(void) |
409 | { | |
dfbb9042 | 410 | int codesize, datasize, initsize; |
01066625 | 411 | int nid; |
1da177e4 | 412 | |
94c28510 PM |
413 | iommu_init(); |
414 | ||
2de212eb PM |
415 | num_physpages = 0; |
416 | high_memory = NULL; | |
417 | ||
01066625 PM |
418 | for_each_online_node(nid) { |
419 | pg_data_t *pgdat = NODE_DATA(nid); | |
420 | unsigned long node_pages = 0; | |
421 | void *node_high_memory; | |
01066625 PM |
422 | |
423 | num_physpages += pgdat->node_present_pages; | |
424 | ||
425 | if (pgdat->node_spanned_pages) | |
426 | node_pages = free_all_bootmem_node(pgdat); | |
427 | ||
428 | totalram_pages += node_pages; | |
1da177e4 | 429 | |
2de212eb PM |
430 | node_high_memory = (void *)__va((pgdat->node_start_pfn + |
431 | pgdat->node_spanned_pages) << | |
432 | PAGE_SHIFT); | |
01066625 PM |
433 | if (node_high_memory > high_memory) |
434 | high_memory = node_high_memory; | |
435 | } | |
1da177e4 | 436 | |
37443ef3 PM |
437 | /* Set this up early, so we can take care of the zero page */ |
438 | cpu_cache_init(); | |
439 | ||
1da177e4 LT |
440 | /* clear the zero-page */ |
441 | memset(empty_zero_page, 0, PAGE_SIZE); | |
442 | __flush_wback_region(empty_zero_page, PAGE_SIZE); | |
443 | ||
35f99c0d PM |
444 | vsyscall_init(); |
445 | ||
1da177e4 LT |
446 | codesize = (unsigned long) &_etext - (unsigned long) &_text; |
447 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
448 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
449 | ||
2cb7ce3b | 450 | printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " |
dfbb9042 | 451 | "%dk data, %dk init)\n", |
cc013a88 | 452 | nr_free_pages() << (PAGE_SHIFT-10), |
2de212eb | 453 | num_physpages << (PAGE_SHIFT-10), |
1da177e4 | 454 | codesize >> 10, |
1da177e4 LT |
455 | datasize >> 10, |
456 | initsize >> 10); | |
457 | ||
35f99c0d PM |
458 | printk(KERN_INFO "virtual kernel memory layout:\n" |
459 | " fixmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
460 | #ifdef CONFIG_HIGHMEM | |
461 | " pkmap : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
462 | #endif | |
463 | " vmalloc : 0x%08lx - 0x%08lx (%4ld MB)\n" | |
3125ee72 | 464 | " lowmem : 0x%08lx - 0x%08lx (%4ld MB) (cached)\n" |
b0f3ae03 | 465 | #ifdef CONFIG_UNCACHED_MAPPING |
3125ee72 | 466 | " : 0x%08lx - 0x%08lx (%4ld MB) (uncached)\n" |
b0f3ae03 | 467 | #endif |
35f99c0d PM |
468 | " .init : 0x%08lx - 0x%08lx (%4ld kB)\n" |
469 | " .data : 0x%08lx - 0x%08lx (%4ld kB)\n" | |
470 | " .text : 0x%08lx - 0x%08lx (%4ld kB)\n", | |
471 | FIXADDR_START, FIXADDR_TOP, | |
472 | (FIXADDR_TOP - FIXADDR_START) >> 10, | |
473 | ||
474 | #ifdef CONFIG_HIGHMEM | |
475 | PKMAP_BASE, PKMAP_BASE+LAST_PKMAP*PAGE_SIZE, | |
476 | (LAST_PKMAP*PAGE_SIZE) >> 10, | |
477 | #endif | |
478 | ||
479 | (unsigned long)VMALLOC_START, VMALLOC_END, | |
480 | (VMALLOC_END - VMALLOC_START) >> 20, | |
481 | ||
482 | (unsigned long)memory_start, (unsigned long)high_memory, | |
483 | ((unsigned long)high_memory - (unsigned long)memory_start) >> 20, | |
484 | ||
b0f3ae03 | 485 | #ifdef CONFIG_UNCACHED_MAPPING |
9edef286 | 486 | uncached_start, uncached_end, uncached_size >> 20, |
b0f3ae03 | 487 | #endif |
3125ee72 | 488 | |
35f99c0d PM |
489 | (unsigned long)&__init_begin, (unsigned long)&__init_end, |
490 | ((unsigned long)&__init_end - | |
491 | (unsigned long)&__init_begin) >> 10, | |
492 | ||
493 | (unsigned long)&_etext, (unsigned long)&_edata, | |
494 | ((unsigned long)&_edata - (unsigned long)&_etext) >> 10, | |
495 | ||
496 | (unsigned long)&_text, (unsigned long)&_etext, | |
497 | ((unsigned long)&_etext - (unsigned long)&_text) >> 10); | |
d9b9487a PM |
498 | |
499 | mem_init_done = 1; | |
1da177e4 LT |
500 | } |
501 | ||
502 | void free_initmem(void) | |
503 | { | |
504 | unsigned long addr; | |
65463b73 | 505 | |
1da177e4 LT |
506 | addr = (unsigned long)(&__init_begin); |
507 | for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { | |
508 | ClearPageReserved(virt_to_page(addr)); | |
7835e98b | 509 | init_page_count(virt_to_page(addr)); |
1da177e4 LT |
510 | free_page(addr); |
511 | totalram_pages++; | |
512 | } | |
07cbb41b PM |
513 | printk("Freeing unused kernel memory: %ldk freed\n", |
514 | ((unsigned long)&__init_end - | |
515 | (unsigned long)&__init_begin) >> 10); | |
1da177e4 LT |
516 | } |
517 | ||
518 | #ifdef CONFIG_BLK_DEV_INITRD | |
519 | void free_initrd_mem(unsigned long start, unsigned long end) | |
520 | { | |
521 | unsigned long p; | |
522 | for (p = start; p < end; p += PAGE_SIZE) { | |
523 | ClearPageReserved(virt_to_page(p)); | |
7835e98b | 524 | init_page_count(virt_to_page(p)); |
1da177e4 LT |
525 | free_page(p); |
526 | totalram_pages++; | |
527 | } | |
2de212eb | 528 | printk("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); |
1da177e4 LT |
529 | } |
530 | #endif | |
33d63bd8 PM |
531 | |
532 | #ifdef CONFIG_MEMORY_HOTPLUG | |
33d63bd8 PM |
533 | int arch_add_memory(int nid, u64 start, u64 size) |
534 | { | |
535 | pg_data_t *pgdat; | |
536 | unsigned long start_pfn = start >> PAGE_SHIFT; | |
537 | unsigned long nr_pages = size >> PAGE_SHIFT; | |
538 | int ret; | |
539 | ||
540 | pgdat = NODE_DATA(nid); | |
541 | ||
542 | /* We only have ZONE_NORMAL, so this is easy.. */ | |
c04fc586 GH |
543 | ret = __add_pages(nid, pgdat->node_zones + ZONE_NORMAL, |
544 | start_pfn, nr_pages); | |
33d63bd8 | 545 | if (unlikely(ret)) |
866e6b9e | 546 | printk("%s: Failed, __add_pages() == %d\n", __func__, ret); |
33d63bd8 PM |
547 | |
548 | return ret; | |
549 | } | |
550 | EXPORT_SYMBOL_GPL(arch_add_memory); | |
551 | ||
357d5946 | 552 | #ifdef CONFIG_NUMA |
33d63bd8 PM |
553 | int memory_add_physaddr_to_nid(u64 addr) |
554 | { | |
555 | /* Node 0 for now.. */ | |
556 | return 0; | |
557 | } | |
558 | EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); | |
559 | #endif | |
1f69b6af | 560 | |
3159e7d6 | 561 | #endif /* CONFIG_MEMORY_HOTPLUG */ |