init.c (598ee698d9db7beb06e12f4ea9d9a5fbc03a3a77) init.c (95f72d1ed41a66f1c1c29c24d479de81a0bea36f)
1/*
2 * linux/arch/sh/mm/init.c
3 *
4 * Copyright (C) 1999 Niibe Yutaka
5 * Copyright (C) 2002 - 2010 Paul Mundt
6 *
7 * Based on linux/arch/i386/mm/init.c:
8 * Copyright (C) 1995 Linus Torvalds
9 */
10#include <linux/mm.h>
11#include <linux/swap.h>
12#include <linux/init.h>
13#include <linux/gfp.h>
14#include <linux/bootmem.h>
15#include <linux/proc_fs.h>
16#include <linux/pagemap.h>
17#include <linux/percpu.h>
18#include <linux/io.h>
1/*
2 * linux/arch/sh/mm/init.c
3 *
4 * Copyright (C) 1999 Niibe Yutaka
5 * Copyright (C) 2002 - 2010 Paul Mundt
6 *
7 * Based on linux/arch/i386/mm/init.c:
8 * Copyright (C) 1995 Linus Torvalds
9 */
10#include <linux/mm.h>
11#include <linux/swap.h>
12#include <linux/init.h>
13#include <linux/gfp.h>
14#include <linux/bootmem.h>
15#include <linux/proc_fs.h>
16#include <linux/pagemap.h>
17#include <linux/percpu.h>
18#include <linux/io.h>
19#include <linux/lmb.h>
19#include <linux/memblock.h>
20#include <linux/dma-mapping.h>
21#include <asm/mmu_context.h>
22#include <asm/mmzone.h>
23#include <asm/kexec.h>
24#include <asm/tlb.h>
25#include <asm/cacheflush.h>
26#include <asm/sections.h>
27#include <asm/setup.h>
28#include <asm/cache.h>
29#include <asm/sizes.h>
30
31DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
32pgd_t swapper_pg_dir[PTRS_PER_PGD];
33
34void __init generic_mem_init(void)
35{
20#include <linux/dma-mapping.h>
21#include <asm/mmu_context.h>
22#include <asm/mmzone.h>
23#include <asm/kexec.h>
24#include <asm/tlb.h>
25#include <asm/cacheflush.h>
26#include <asm/sections.h>
27#include <asm/setup.h>
28#include <asm/cache.h>
29#include <asm/sizes.h>
30
31DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
32pgd_t swapper_pg_dir[PTRS_PER_PGD];
33
34void __init generic_mem_init(void)
35{
36 lmb_add(__MEMORY_START, __MEMORY_SIZE);
36 memblock_add(__MEMORY_START, __MEMORY_SIZE);
37}
38
39void __init __weak plat_mem_setup(void)
40{
41 /* Nothing to see here, move along. */
42}
43
44#ifdef CONFIG_MMU
45static pte_t *__get_pte_phys(unsigned long addr)
46{
47 pgd_t *pgd;
48 pud_t *pud;
49 pmd_t *pmd;
37}
38
39void __init __weak plat_mem_setup(void)
40{
41 /* Nothing to see here, move along. */
42}
43
44#ifdef CONFIG_MMU
45static pte_t *__get_pte_phys(unsigned long addr)
46{
47 pgd_t *pgd;
48 pud_t *pud;
49 pmd_t *pmd;
50 pte_t *pte;
50
51 pgd = pgd_offset_k(addr);
52 if (pgd_none(*pgd)) {
53 pgd_ERROR(*pgd);
54 return NULL;
55 }
56
57 pud = pud_alloc(NULL, pgd, addr);
58 if (unlikely(!pud)) {
59 pud_ERROR(*pud);
60 return NULL;
61 }
62
63 pmd = pmd_alloc(NULL, pud, addr);
64 if (unlikely(!pmd)) {
65 pmd_ERROR(*pmd);
66 return NULL;
67 }
68
51
52 pgd = pgd_offset_k(addr);
53 if (pgd_none(*pgd)) {
54 pgd_ERROR(*pgd);
55 return NULL;
56 }
57
58 pud = pud_alloc(NULL, pgd, addr);
59 if (unlikely(!pud)) {
60 pud_ERROR(*pud);
61 return NULL;
62 }
63
64 pmd = pmd_alloc(NULL, pud, addr);
65 if (unlikely(!pmd)) {
66 pmd_ERROR(*pmd);
67 return NULL;
68 }
69
69 return pte_offset_kernel(pmd, addr);
70 pte = pte_offset_kernel(pmd, addr);
71 return pte;
70}
71
72static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
73{
74 pte_t *pte;
75
76 pte = __get_pte_phys(addr);
77 if (!pte_none(*pte)) {

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118 if (idx >= __end_of_fixed_addresses) {
119 BUG();
120 return;
121 }
122
123 clear_pte_phys(address, prot);
124}
125
72}
73
74static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
75{
76 pte_t *pte;
77
78 pte = __get_pte_phys(addr);
79 if (!pte_none(*pte)) {

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120 if (idx >= __end_of_fixed_addresses) {
121 BUG();
122 return;
123 }
124
125 clear_pte_phys(address, prot);
126}
127
126static pmd_t * __init one_md_table_init(pud_t *pud)
127{
128 if (pud_none(*pud)) {
129 pmd_t *pmd;
130
131 pmd = alloc_bootmem_pages(PAGE_SIZE);
132 pud_populate(&init_mm, pud, pmd);
133 BUG_ON(pmd != pmd_offset(pud, 0));
134 }
135
136 return pmd_offset(pud, 0);
137}
138
139static pte_t * __init one_page_table_init(pmd_t *pmd)
140{
141 if (pmd_none(*pmd)) {
142 pte_t *pte;
143
144 pte = alloc_bootmem_pages(PAGE_SIZE);
145 pmd_populate_kernel(&init_mm, pmd, pte);
146 BUG_ON(pte != pte_offset_kernel(pmd, 0));
147 }
148
149 return pte_offset_kernel(pmd, 0);
150}
151
152static pte_t * __init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
153 unsigned long vaddr, pte_t *lastpte)
154{
155 return pte;
156}
157
158void __init page_table_range_init(unsigned long start, unsigned long end,
159 pgd_t *pgd_base)
160{
161 pgd_t *pgd;
162 pud_t *pud;
163 pmd_t *pmd;
128void __init page_table_range_init(unsigned long start, unsigned long end,
129 pgd_t *pgd_base)
130{
131 pgd_t *pgd;
132 pud_t *pud;
133 pmd_t *pmd;
164 pte_t *pte = NULL;
134 pte_t *pte;
165 int i, j, k;
166 unsigned long vaddr;
167
168 vaddr = start;
169 i = __pgd_offset(vaddr);
170 j = __pud_offset(vaddr);
171 k = __pmd_offset(vaddr);
172 pgd = pgd_base + i;
173
174 for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
175 pud = (pud_t *)pgd;
176 for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
135 int i, j, k;
136 unsigned long vaddr;
137
138 vaddr = start;
139 i = __pgd_offset(vaddr);
140 j = __pud_offset(vaddr);
141 k = __pmd_offset(vaddr);
142 pgd = pgd_base + i;
143
144 for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
145 pud = (pud_t *)pgd;
146 for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
177 pmd = one_md_table_init(pud);
178#ifndef __PAGETABLE_PMD_FOLDED
147#ifdef __PAGETABLE_PMD_FOLDED
148 pmd = (pmd_t *)pud;
149#else
150 pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
151 pud_populate(&init_mm, pud, pmd);
179 pmd += k;
180#endif
181 for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
152 pmd += k;
153#endif
154 for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
182 pte = page_table_kmap_check(one_page_table_init(pmd),
183 pmd, vaddr, pte);
155 if (pmd_none(*pmd)) {
156 pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
157 pmd_populate_kernel(&init_mm, pmd, pte);
158 BUG_ON(pte != pte_offset_kernel(pmd, 0));
159 }
184 vaddr += PMD_SIZE;
185 }
186 k = 0;
187 }
188 j = 0;
189 }
190}
191#endif /* CONFIG_MMU */
192
193void __init allocate_pgdat(unsigned int nid)
194{
195 unsigned long start_pfn, end_pfn;
196#ifdef CONFIG_NEED_MULTIPLE_NODES
197 unsigned long phys;
198#endif
199
200 get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
201
202#ifdef CONFIG_NEED_MULTIPLE_NODES
160 vaddr += PMD_SIZE;
161 }
162 k = 0;
163 }
164 j = 0;
165 }
166}
167#endif /* CONFIG_MMU */
168
169void __init allocate_pgdat(unsigned int nid)
170{
171 unsigned long start_pfn, end_pfn;
172#ifdef CONFIG_NEED_MULTIPLE_NODES
173 unsigned long phys;
174#endif
175
176 get_pfn_range_for_nid(nid, &start_pfn, &end_pfn);
177
178#ifdef CONFIG_NEED_MULTIPLE_NODES
203 phys = __lmb_alloc_base(sizeof(struct pglist_data),
179 phys = __memblock_alloc_base(sizeof(struct pglist_data),
204 SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
205 /* Retry with all of system memory */
206 if (!phys)
180 SMP_CACHE_BYTES, end_pfn << PAGE_SHIFT);
181 /* Retry with all of system memory */
182 if (!phys)
207 phys = __lmb_alloc_base(sizeof(struct pglist_data),
208 SMP_CACHE_BYTES, lmb_end_of_DRAM());
183 phys = __memblock_alloc_base(sizeof(struct pglist_data),
184 SMP_CACHE_BYTES, memblock_end_of_DRAM());
209 if (!phys)
210 panic("Can't allocate pgdat for node %d\n", nid);
211
212 NODE_DATA(nid) = __va(phys);
213 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
214
215 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
216#endif

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231 /* Nothing to do.. */
232 if (!p->node_spanned_pages)
233 return;
234
235 end_pfn = p->node_start_pfn + p->node_spanned_pages;
236
237 total_pages = bootmem_bootmap_pages(p->node_spanned_pages);
238
185 if (!phys)
186 panic("Can't allocate pgdat for node %d\n", nid);
187
188 NODE_DATA(nid) = __va(phys);
189 memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
190
191 NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
192#endif

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207 /* Nothing to do.. */
208 if (!p->node_spanned_pages)
209 return;
210
211 end_pfn = p->node_start_pfn + p->node_spanned_pages;
212
213 total_pages = bootmem_bootmap_pages(p->node_spanned_pages);
214
239 paddr = lmb_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE);
215 paddr = memblock_alloc(total_pages << PAGE_SHIFT, PAGE_SIZE);
240 if (!paddr)
241 panic("Can't allocate bootmap for nid[%d]\n", nid);
242
243 init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn);
244
245 free_bootmem_with_active_regions(nid, end_pfn);
246
247 /*
248 * XXX Handle initial reservations for the system memory node
249 * only for the moment, we'll refactor this later for handling
250 * reservations in other nodes.
251 */
252 if (nid == 0) {
253 /* Reserve the sections we're already using. */
216 if (!paddr)
217 panic("Can't allocate bootmap for nid[%d]\n", nid);
218
219 init_bootmem_node(p, paddr >> PAGE_SHIFT, p->node_start_pfn, end_pfn);
220
221 free_bootmem_with_active_regions(nid, end_pfn);
222
223 /*
224 * XXX Handle initial reservations for the system memory node
225 * only for the moment, we'll refactor this later for handling
226 * reservations in other nodes.
227 */
228 if (nid == 0) {
229 /* Reserve the sections we're already using. */
254 for (i = 0; i < lmb.reserved.cnt; i++)
255 reserve_bootmem(lmb.reserved.region[i].base,
256 lmb_size_bytes(&lmb.reserved, i),
230 for (i = 0; i < memblock.reserved.cnt; i++)
231 reserve_bootmem(memblock.reserved.region[i].base,
232 memblock_size_bytes(&memblock.reserved, i),
257 BOOTMEM_DEFAULT);
258 }
259
260 sparse_memory_present_with_active_regions(nid);
261}
262
263static void __init do_init_bootmem(void)
264{
265 int i;
266
267 /* Add active regions with valid PFNs. */
233 BOOTMEM_DEFAULT);
234 }
235
236 sparse_memory_present_with_active_regions(nid);
237}
238
239static void __init do_init_bootmem(void)
240{
241 int i;
242
243 /* Add active regions with valid PFNs. */
268 for (i = 0; i < lmb.memory.cnt; i++) {
244 for (i = 0; i < memblock.memory.cnt; i++) {
269 unsigned long start_pfn, end_pfn;
245 unsigned long start_pfn, end_pfn;
270 start_pfn = lmb.memory.region[i].base >> PAGE_SHIFT;
271 end_pfn = start_pfn + lmb_size_pages(&lmb.memory, i);
246 start_pfn = memblock.memory.region[i].base >> PAGE_SHIFT;
247 end_pfn = start_pfn + memblock_size_pages(&memblock.memory, i);
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();

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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 */
248 __add_active_range(0, start_pfn, end_pfn);
249 }
250
251 /* All of system RAM sits in node 0 for the non-NUMA case */
252 allocate_pgdat(0);
253 node_set_online(0);
254
255 plat_mem_setup();

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271 start_pfn = PFN_UP(__pa(_end));
272
273 /*
274 * Reserve the kernel text and Reserve the bootmem bitmap. We do
275 * this in two steps (first step was init_bootmem()), because
276 * this catches the (definitely buggy) case of us accidentally
277 * initializing the bootmem allocator with an invalid RAM area.
278 */
303 lmb_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
279 memblock_reserve(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
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)
280 (PFN_PHYS(start_pfn) + PAGE_SIZE - 1) -
281 (__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET));
282
283 /*
284 * Reserve physical pages below CONFIG_ZERO_PAGE_OFFSET.
285 */
286 if (CONFIG_ZERO_PAGE_OFFSET != 0)
311 lmb_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
287 memblock_reserve(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET);
312
313 /*
314 * Handle additional early reservations
315 */
316 check_for_initrd();
317 reserve_crashkernel();
318}
319
320void __init paging_init(void)
321{
322 unsigned long max_zone_pfns[MAX_NR_ZONES];
323 unsigned long vaddr, end;
324 int nid;
325
288
289 /*
290 * Handle additional early reservations
291 */
292 check_for_initrd();
293 reserve_crashkernel();
294}
295
296void __init paging_init(void)
297{
298 unsigned long max_zone_pfns[MAX_NR_ZONES];
299 unsigned long vaddr, end;
300 int nid;
301
326 lmb_init();
302 memblock_init();
327
328 sh_mv.mv_mem_init();
329
330 early_reserve_mem();
331
303
304 sh_mv.mv_mem_init();
305
306 early_reserve_mem();
307
332 lmb_enforce_memory_limit(memory_limit);
333 lmb_analyze();
308 memblock_enforce_memory_limit(memory_limit);
309 memblock_analyze();
334
310
335 lmb_dump_all();
311 memblock_dump_all();
336
337 /*
338 * Determine low and high memory ranges:
339 */
312
313 /*
314 * Determine low and high memory ranges:
315 */
340 max_low_pfn = max_pfn = lmb_end_of_DRAM() >> PAGE_SHIFT;
316 max_low_pfn = max_pfn = memblock_end_of_DRAM() >> PAGE_SHIFT;
341 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
342
343 nodes_clear(node_online_map);
344
345 memory_start = (unsigned long)__va(__MEMORY_START);
317 min_low_pfn = __MEMORY_START >> PAGE_SHIFT;
318
319 nodes_clear(node_online_map);
320
321 memory_start = (unsigned long)__va(__MEMORY_START);
346 memory_end = memory_start + (memory_limit ?: lmb_phys_mem_size());
322 memory_end = memory_start + (memory_limit ?: memblock_phys_mem_size());
347
348 uncached_init();
349 pmb_init();
350 do_init_bootmem();
351 ioremap_fixed_init();
352
353 /* We don't need to map the kernel through the TLB, as
354 * it is permanatly mapped using P1. So clear the

--- 201 unchanged lines hidden --- 		323
324 uncached_init();
325 pmb_init();
326 do_init_bootmem();
327 ioremap_fixed_init();
328
329 /* We don't need to map the kernel through the TLB, as
330 * it is permanatly mapped using P1. So clear the

--- 201 unchanged lines hidden ---