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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/sparc/mm/init.c
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1995 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
9 */
10
11#include <linux/module.h>
12#include <linux/signal.h>
13#include <linux/sched.h>
14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/string.h>
17#include <linux/types.h>
18#include <linux/ptrace.h>
19#include <linux/mman.h>
20#include <linux/mm.h>
21#include <linux/swap.h>
22#include <linux/initrd.h>
23#include <linux/init.h>
24#include <linux/highmem.h>
25#include <linux/bootmem.h>
26#include <linux/pagemap.h>
27#include <linux/poison.h>
28#include <linux/gfp.h>
29
30#include <asm/sections.h>
31#include <asm/page.h>
32#include <asm/pgtable.h>
33#include <asm/vaddrs.h>
34#include <asm/pgalloc.h> /* bug in asm-generic/tlb.h: check_pgt_cache */
35#include <asm/setup.h>
36#include <asm/tlb.h>
37#include <asm/prom.h>
38#include <asm/leon.h>
39
40#include "mm_32.h"
41
42unsigned long *sparc_valid_addr_bitmap;
43EXPORT_SYMBOL(sparc_valid_addr_bitmap);
44
45unsigned long phys_base;
46EXPORT_SYMBOL(phys_base);
47
48unsigned long pfn_base;
49EXPORT_SYMBOL(pfn_base);
50
51struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
52
53/* Initial ramdisk setup */
54extern unsigned int sparc_ramdisk_image;
55extern unsigned int sparc_ramdisk_size;
56
57unsigned long highstart_pfn, highend_pfn;
58
59unsigned long last_valid_pfn;
60
61unsigned long calc_highpages(void)
62{
63 int i;
64 int nr = 0;
65
66 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
67 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
68 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
69
70 if (end_pfn <= max_low_pfn)
71 continue;
72
73 if (start_pfn < max_low_pfn)
74 start_pfn = max_low_pfn;
75
76 nr += end_pfn - start_pfn;
77 }
78
79 return nr;
80}
81
82static unsigned long calc_max_low_pfn(void)
83{
84 int i;
85 unsigned long tmp = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
86 unsigned long curr_pfn, last_pfn;
87
88 last_pfn = (sp_banks[0].base_addr + sp_banks[0].num_bytes) >> PAGE_SHIFT;
89 for (i = 1; sp_banks[i].num_bytes != 0; i++) {
90 curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
91
92 if (curr_pfn >= tmp) {
93 if (last_pfn < tmp)
94 tmp = last_pfn;
95 break;
96 }
97
98 last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
99 }
100
101 return tmp;
102}
103
104unsigned long __init bootmem_init(unsigned long *pages_avail)
105{
106 unsigned long bootmap_size, start_pfn;
107 unsigned long end_of_phys_memory = 0UL;
108 unsigned long bootmap_pfn, bytes_avail, size;
109 int i;
110
111 bytes_avail = 0UL;
112 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
113 end_of_phys_memory = sp_banks[i].base_addr +
114 sp_banks[i].num_bytes;
115 bytes_avail += sp_banks[i].num_bytes;
116 if (cmdline_memory_size) {
117 if (bytes_avail > cmdline_memory_size) {
118 unsigned long slack = bytes_avail - cmdline_memory_size;
119
120 bytes_avail -= slack;
121 end_of_phys_memory -= slack;
122
123 sp_banks[i].num_bytes -= slack;
124 if (sp_banks[i].num_bytes == 0) {
125 sp_banks[i].base_addr = 0xdeadbeef;
126 } else {
127 sp_banks[i+1].num_bytes = 0;
128 sp_banks[i+1].base_addr = 0xdeadbeef;
129 }
130 break;
131 }
132 }
133 }
134
135 /* Start with page aligned address of last symbol in kernel
136 * image.
137 */
138 start_pfn = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));
139
140 /* Now shift down to get the real physical page frame number. */
141 start_pfn >>= PAGE_SHIFT;
142
143 bootmap_pfn = start_pfn;
144
145 max_pfn = end_of_phys_memory >> PAGE_SHIFT;
146
147 max_low_pfn = max_pfn;
148 highstart_pfn = highend_pfn = max_pfn;
149
150 if (max_low_pfn > pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT)) {
151 highstart_pfn = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
152 max_low_pfn = calc_max_low_pfn();
153 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
154 calc_highpages() >> (20 - PAGE_SHIFT));
155 }
156
157#ifdef CONFIG_BLK_DEV_INITRD
158 /* Now have to check initial ramdisk, so that bootmap does not overwrite it */
159 if (sparc_ramdisk_image) {
160 if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
161 sparc_ramdisk_image -= KERNBASE;
162 initrd_start = sparc_ramdisk_image + phys_base;
163 initrd_end = initrd_start + sparc_ramdisk_size;
164 if (initrd_end > end_of_phys_memory) {
165 printk(KERN_CRIT "initrd extends beyond end of memory "
166 "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
167 initrd_end, end_of_phys_memory);
168 initrd_start = 0;
169 }
170 if (initrd_start) {
171 if (initrd_start >= (start_pfn << PAGE_SHIFT) &&
172 initrd_start < (start_pfn << PAGE_SHIFT) + 2 * PAGE_SIZE)
173 bootmap_pfn = PAGE_ALIGN (initrd_end) >> PAGE_SHIFT;
174 }
175 }
176#endif
177 /* Initialize the boot-time allocator. */
178 bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap_pfn, pfn_base,
179 max_low_pfn);
180
181 /* Now register the available physical memory with the
182 * allocator.
183 */
184 *pages_avail = 0;
185 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
186 unsigned long curr_pfn, last_pfn;
187
188 curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
189 if (curr_pfn >= max_low_pfn)
190 break;
191
192 last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
193 if (last_pfn > max_low_pfn)
194 last_pfn = max_low_pfn;
195
196 /*
197 * .. finally, did all the rounding and playing
198 * around just make the area go away?
199 */
200 if (last_pfn <= curr_pfn)
201 continue;
202
203 size = (last_pfn - curr_pfn) << PAGE_SHIFT;
204 *pages_avail += last_pfn - curr_pfn;
205
206 free_bootmem(sp_banks[i].base_addr, size);
207 }
208
209#ifdef CONFIG_BLK_DEV_INITRD
210 if (initrd_start) {
211 /* Reserve the initrd image area. */
212 size = initrd_end - initrd_start;
213 reserve_bootmem(initrd_start, size, BOOTMEM_DEFAULT);
214 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
215
216 initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
217 initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
218 }
219#endif
220 /* Reserve the kernel text/data/bss. */
221 size = (start_pfn << PAGE_SHIFT) - phys_base;
222 reserve_bootmem(phys_base, size, BOOTMEM_DEFAULT);
223 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
224
225 /* Reserve the bootmem map. We do not account for it
226 * in pages_avail because we will release that memory
227 * in free_all_bootmem.
228 */
229 size = bootmap_size;
230 reserve_bootmem((bootmap_pfn << PAGE_SHIFT), size, BOOTMEM_DEFAULT);
231 *pages_avail -= PAGE_ALIGN(size) >> PAGE_SHIFT;
232
233 return max_pfn;
234}
235
236/*
237 * paging_init() sets up the page tables: We call the MMU specific
238 * init routine based upon the Sun model type on the Sparc.
239 *
240 */
241void __init paging_init(void)
242{
243 srmmu_paging_init();
244 prom_build_devicetree();
245 of_fill_in_cpu_data();
246 device_scan();
247}
248
249static void __init taint_real_pages(void)
250{
251 int i;
252
253 for (i = 0; sp_banks[i].num_bytes; i++) {
254 unsigned long start, end;
255
256 start = sp_banks[i].base_addr;
257 end = start + sp_banks[i].num_bytes;
258
259 while (start < end) {
260 set_bit(start >> 20, sparc_valid_addr_bitmap);
261 start += PAGE_SIZE;
262 }
263 }
264}
265
266static void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
267{
268 unsigned long tmp;
269
270#ifdef CONFIG_DEBUG_HIGHMEM
271 printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
272#endif
273
274 for (tmp = start_pfn; tmp < end_pfn; tmp++)
275 free_highmem_page(pfn_to_page(tmp));
276}
277
278void __init mem_init(void)
279{
280 int i;
281
282 if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
283 prom_printf("BUG: fixmap and pkmap areas overlap\n");
284 prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n",
285 PKMAP_BASE,
286 (unsigned long)PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
287 FIXADDR_START);
288 prom_printf("Please mail sparclinux@vger.kernel.org.\n");
289 prom_halt();
290 }
291
292
293 /* Saves us work later. */
294 memset((void *)empty_zero_page, 0, PAGE_SIZE);
295
296 i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
297 i += 1;
298 sparc_valid_addr_bitmap = (unsigned long *)
299 __alloc_bootmem(i << 2, SMP_CACHE_BYTES, 0UL);
300
301 if (sparc_valid_addr_bitmap == NULL) {
302 prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
303 prom_halt();
304 }
305 memset(sparc_valid_addr_bitmap, 0, i << 2);
306
307 taint_real_pages();
308
309 max_mapnr = last_valid_pfn - pfn_base;
310 high_memory = __va(max_low_pfn << PAGE_SHIFT);
311 free_all_bootmem();
312
313 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
314 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
315 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
316
317 if (end_pfn <= highstart_pfn)
318 continue;
319
320 if (start_pfn < highstart_pfn)
321 start_pfn = highstart_pfn;
322
323 map_high_region(start_pfn, end_pfn);
324 }
325
326 mem_init_print_info(NULL);
327}
328
329void free_initmem (void)
330{
331 free_initmem_default(POISON_FREE_INITMEM);
332}
333
334#ifdef CONFIG_BLK_DEV_INITRD
335void free_initrd_mem(unsigned long start, unsigned long end)
336{
337 free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
338 "initrd");
339}
340#endif
341
342void sparc_flush_page_to_ram(struct page *page)
343{
344 unsigned long vaddr = (unsigned long)page_address(page);
345
346 if (vaddr)
347 __flush_page_to_ram(vaddr);
348}
349EXPORT_SYMBOL(sparc_flush_page_to_ram);
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * linux/arch/sparc/mm/init.c
4 *
5 * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1995 Eddie C. Dost (ecd@skynet.be)
7 * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 2000 Anton Blanchard (anton@samba.org)
9 */
10
11#include <linux/module.h>
12#include <linux/signal.h>
13#include <linux/sched.h>
14#include <linux/kernel.h>
15#include <linux/errno.h>
16#include <linux/string.h>
17#include <linux/types.h>
18#include <linux/ptrace.h>
19#include <linux/mman.h>
20#include <linux/mm.h>
21#include <linux/swap.h>
22#include <linux/initrd.h>
23#include <linux/init.h>
24#include <linux/highmem.h>
25#include <linux/memblock.h>
26#include <linux/pagemap.h>
27#include <linux/poison.h>
28#include <linux/gfp.h>
29
30#include <asm/sections.h>
31#include <asm/page.h>
32#include <asm/vaddrs.h>
33#include <asm/setup.h>
34#include <asm/tlb.h>
35#include <asm/prom.h>
36#include <asm/leon.h>
37
38#include "mm_32.h"
39
40static unsigned long *sparc_valid_addr_bitmap;
41
42unsigned long phys_base;
43EXPORT_SYMBOL(phys_base);
44
45unsigned long pfn_base;
46EXPORT_SYMBOL(pfn_base);
47
48struct sparc_phys_banks sp_banks[SPARC_PHYS_BANKS+1];
49
50/* Initial ramdisk setup */
51extern unsigned int sparc_ramdisk_image;
52extern unsigned int sparc_ramdisk_size;
53
54unsigned long highstart_pfn, highend_pfn;
55
56unsigned long last_valid_pfn;
57
58unsigned long calc_highpages(void)
59{
60 int i;
61 int nr = 0;
62
63 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
64 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
65 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
66
67 if (end_pfn <= max_low_pfn)
68 continue;
69
70 if (start_pfn < max_low_pfn)
71 start_pfn = max_low_pfn;
72
73 nr += end_pfn - start_pfn;
74 }
75
76 return nr;
77}
78
79static unsigned long calc_max_low_pfn(void)
80{
81 int i;
82 unsigned long tmp = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
83 unsigned long curr_pfn, last_pfn;
84
85 last_pfn = (sp_banks[0].base_addr + sp_banks[0].num_bytes) >> PAGE_SHIFT;
86 for (i = 1; sp_banks[i].num_bytes != 0; i++) {
87 curr_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
88
89 if (curr_pfn >= tmp) {
90 if (last_pfn < tmp)
91 tmp = last_pfn;
92 break;
93 }
94
95 last_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
96 }
97
98 return tmp;
99}
100
101static void __init find_ramdisk(unsigned long end_of_phys_memory)
102{
103#ifdef CONFIG_BLK_DEV_INITRD
104 unsigned long size;
105
106 /* Now have to check initial ramdisk, so that it won't pass
107 * the end of memory
108 */
109 if (sparc_ramdisk_image) {
110 if (sparc_ramdisk_image >= (unsigned long)&_end - 2 * PAGE_SIZE)
111 sparc_ramdisk_image -= KERNBASE;
112 initrd_start = sparc_ramdisk_image + phys_base;
113 initrd_end = initrd_start + sparc_ramdisk_size;
114 if (initrd_end > end_of_phys_memory) {
115 printk(KERN_CRIT "initrd extends beyond end of memory "
116 "(0x%016lx > 0x%016lx)\ndisabling initrd\n",
117 initrd_end, end_of_phys_memory);
118 initrd_start = 0;
119 } else {
120 /* Reserve the initrd image area. */
121 size = initrd_end - initrd_start;
122 memblock_reserve(initrd_start, size);
123
124 initrd_start = (initrd_start - phys_base) + PAGE_OFFSET;
125 initrd_end = (initrd_end - phys_base) + PAGE_OFFSET;
126 }
127 }
128#endif
129}
130
131unsigned long __init bootmem_init(unsigned long *pages_avail)
132{
133 unsigned long start_pfn, bytes_avail, size;
134 unsigned long end_of_phys_memory = 0;
135 unsigned long high_pages = 0;
136 int i;
137
138 memblock_set_bottom_up(true);
139 memblock_allow_resize();
140
141 bytes_avail = 0UL;
142 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
143 end_of_phys_memory = sp_banks[i].base_addr +
144 sp_banks[i].num_bytes;
145 bytes_avail += sp_banks[i].num_bytes;
146 if (cmdline_memory_size) {
147 if (bytes_avail > cmdline_memory_size) {
148 unsigned long slack = bytes_avail - cmdline_memory_size;
149
150 bytes_avail -= slack;
151 end_of_phys_memory -= slack;
152
153 sp_banks[i].num_bytes -= slack;
154 if (sp_banks[i].num_bytes == 0) {
155 sp_banks[i].base_addr = 0xdeadbeef;
156 } else {
157 memblock_add(sp_banks[i].base_addr,
158 sp_banks[i].num_bytes);
159 sp_banks[i+1].num_bytes = 0;
160 sp_banks[i+1].base_addr = 0xdeadbeef;
161 }
162 break;
163 }
164 }
165 memblock_add(sp_banks[i].base_addr, sp_banks[i].num_bytes);
166 }
167
168 /* Start with page aligned address of last symbol in kernel
169 * image.
170 */
171 start_pfn = (unsigned long)__pa(PAGE_ALIGN((unsigned long) &_end));
172
173 /* Now shift down to get the real physical page frame number. */
174 start_pfn >>= PAGE_SHIFT;
175
176 max_pfn = end_of_phys_memory >> PAGE_SHIFT;
177
178 max_low_pfn = max_pfn;
179 highstart_pfn = highend_pfn = max_pfn;
180
181 if (max_low_pfn > pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT)) {
182 highstart_pfn = pfn_base + (SRMMU_MAXMEM >> PAGE_SHIFT);
183 max_low_pfn = calc_max_low_pfn();
184 high_pages = calc_highpages();
185 printk(KERN_NOTICE "%ldMB HIGHMEM available.\n",
186 high_pages >> (20 - PAGE_SHIFT));
187 }
188
189 find_ramdisk(end_of_phys_memory);
190
191 /* Reserve the kernel text/data/bss. */
192 size = (start_pfn << PAGE_SHIFT) - phys_base;
193 memblock_reserve(phys_base, size);
194 memblock_add(phys_base, size);
195
196 size = memblock_phys_mem_size() - memblock_reserved_size();
197 *pages_avail = (size >> PAGE_SHIFT) - high_pages;
198
199 /* Only allow low memory to be allocated via memblock allocation */
200 memblock_set_current_limit(max_low_pfn << PAGE_SHIFT);
201
202 return max_pfn;
203}
204
205/*
206 * paging_init() sets up the page tables: We call the MMU specific
207 * init routine based upon the Sun model type on the Sparc.
208 *
209 */
210void __init paging_init(void)
211{
212 srmmu_paging_init();
213 prom_build_devicetree();
214 of_fill_in_cpu_data();
215 device_scan();
216}
217
218static void __init taint_real_pages(void)
219{
220 int i;
221
222 for (i = 0; sp_banks[i].num_bytes; i++) {
223 unsigned long start, end;
224
225 start = sp_banks[i].base_addr;
226 end = start + sp_banks[i].num_bytes;
227
228 while (start < end) {
229 set_bit(start >> 20, sparc_valid_addr_bitmap);
230 start += PAGE_SIZE;
231 }
232 }
233}
234
235static void map_high_region(unsigned long start_pfn, unsigned long end_pfn)
236{
237 unsigned long tmp;
238
239#ifdef CONFIG_DEBUG_HIGHMEM
240 printk("mapping high region %08lx - %08lx\n", start_pfn, end_pfn);
241#endif
242
243 for (tmp = start_pfn; tmp < end_pfn; tmp++)
244 free_highmem_page(pfn_to_page(tmp));
245}
246
247void __init mem_init(void)
248{
249 int i;
250
251 if (PKMAP_BASE+LAST_PKMAP*PAGE_SIZE >= FIXADDR_START) {
252 prom_printf("BUG: fixmap and pkmap areas overlap\n");
253 prom_printf("pkbase: 0x%lx pkend: 0x%lx fixstart 0x%lx\n",
254 PKMAP_BASE,
255 (unsigned long)PKMAP_BASE+LAST_PKMAP*PAGE_SIZE,
256 FIXADDR_START);
257 prom_printf("Please mail sparclinux@vger.kernel.org.\n");
258 prom_halt();
259 }
260
261
262 /* Saves us work later. */
263 memset((void *)empty_zero_page, 0, PAGE_SIZE);
264
265 i = last_valid_pfn >> ((20 - PAGE_SHIFT) + 5);
266 i += 1;
267 sparc_valid_addr_bitmap = (unsigned long *)
268 memblock_alloc(i << 2, SMP_CACHE_BYTES);
269
270 if (sparc_valid_addr_bitmap == NULL) {
271 prom_printf("mem_init: Cannot alloc valid_addr_bitmap.\n");
272 prom_halt();
273 }
274 memset(sparc_valid_addr_bitmap, 0, i << 2);
275
276 taint_real_pages();
277
278 max_mapnr = last_valid_pfn - pfn_base;
279 high_memory = __va(max_low_pfn << PAGE_SHIFT);
280 memblock_free_all();
281
282 for (i = 0; sp_banks[i].num_bytes != 0; i++) {
283 unsigned long start_pfn = sp_banks[i].base_addr >> PAGE_SHIFT;
284 unsigned long end_pfn = (sp_banks[i].base_addr + sp_banks[i].num_bytes) >> PAGE_SHIFT;
285
286 if (end_pfn <= highstart_pfn)
287 continue;
288
289 if (start_pfn < highstart_pfn)
290 start_pfn = highstart_pfn;
291
292 map_high_region(start_pfn, end_pfn);
293 }
294}
295
296void sparc_flush_page_to_ram(struct page *page)
297{
298 unsigned long vaddr = (unsigned long)page_address(page);
299
300 __flush_page_to_ram(vaddr);
301}
302EXPORT_SYMBOL(sparc_flush_page_to_ram);
303
304void sparc_flush_folio_to_ram(struct folio *folio)
305{
306 unsigned long vaddr = (unsigned long)folio_address(folio);
307 unsigned int i, nr = folio_nr_pages(folio);
308
309 for (i = 0; i < nr; i++)
310 __flush_page_to_ram(vaddr + i * PAGE_SIZE);
311}
312EXPORT_SYMBOL(sparc_flush_folio_to_ram);
313
314static const pgprot_t protection_map[16] = {
315 [VM_NONE] = PAGE_NONE,
316 [VM_READ] = PAGE_READONLY,
317 [VM_WRITE] = PAGE_COPY,
318 [VM_WRITE | VM_READ] = PAGE_COPY,
319 [VM_EXEC] = PAGE_READONLY,
320 [VM_EXEC | VM_READ] = PAGE_READONLY,
321 [VM_EXEC | VM_WRITE] = PAGE_COPY,
322 [VM_EXEC | VM_WRITE | VM_READ] = PAGE_COPY,
323 [VM_SHARED] = PAGE_NONE,
324 [VM_SHARED | VM_READ] = PAGE_READONLY,
325 [VM_SHARED | VM_WRITE] = PAGE_SHARED,
326 [VM_SHARED | VM_WRITE | VM_READ] = PAGE_SHARED,
327 [VM_SHARED | VM_EXEC] = PAGE_READONLY,
328 [VM_SHARED | VM_EXEC | VM_READ] = PAGE_READONLY,
329 [VM_SHARED | VM_EXEC | VM_WRITE] = PAGE_SHARED,
330 [VM_SHARED | VM_EXEC | VM_WRITE | VM_READ] = PAGE_SHARED
331};
332DECLARE_VM_GET_PAGE_PROT