root / target-i386 / arch_memory_mapping.c @ 7feb640c
History | View | Annotate | Download (7.9 kB)
1 | fae001f5 | Wen Congyang | /*
|
---|---|---|---|
2 | fae001f5 | Wen Congyang | * i386 memory mapping
|
3 | fae001f5 | Wen Congyang | *
|
4 | fae001f5 | Wen Congyang | * Copyright Fujitsu, Corp. 2011, 2012
|
5 | fae001f5 | Wen Congyang | *
|
6 | fae001f5 | Wen Congyang | * Authors:
|
7 | fae001f5 | Wen Congyang | * Wen Congyang <wency@cn.fujitsu.com>
|
8 | fae001f5 | Wen Congyang | *
|
9 | fc0608ac | Stefan Weil | * This work is licensed under the terms of the GNU GPL, version 2 or later.
|
10 | fc0608ac | Stefan Weil | * See the COPYING file in the top-level directory.
|
11 | fae001f5 | Wen Congyang | *
|
12 | fae001f5 | Wen Congyang | */
|
13 | fae001f5 | Wen Congyang | |
14 | fae001f5 | Wen Congyang | #include "cpu.h" |
15 | 022c62cb | Paolo Bonzini | #include "exec/cpu-all.h" |
16 | 9c17d615 | Paolo Bonzini | #include "sysemu/memory_mapping.h" |
17 | fae001f5 | Wen Congyang | |
18 | fae001f5 | Wen Congyang | /* PAE Paging or IA-32e Paging */
|
19 | a8170e5e | Avi Kivity | static void walk_pte(MemoryMappingList *list, hwaddr pte_start_addr, |
20 | fae001f5 | Wen Congyang | int32_t a20_mask, target_ulong start_line_addr) |
21 | fae001f5 | Wen Congyang | { |
22 | a8170e5e | Avi Kivity | hwaddr pte_addr, start_paddr; |
23 | fae001f5 | Wen Congyang | uint64_t pte; |
24 | fae001f5 | Wen Congyang | target_ulong start_vaddr; |
25 | fae001f5 | Wen Congyang | int i;
|
26 | fae001f5 | Wen Congyang | |
27 | fae001f5 | Wen Congyang | for (i = 0; i < 512; i++) { |
28 | fae001f5 | Wen Congyang | pte_addr = (pte_start_addr + i * 8) & a20_mask;
|
29 | fae001f5 | Wen Congyang | pte = ldq_phys(pte_addr); |
30 | fae001f5 | Wen Congyang | if (!(pte & PG_PRESENT_MASK)) {
|
31 | fae001f5 | Wen Congyang | /* not present */
|
32 | fae001f5 | Wen Congyang | continue;
|
33 | fae001f5 | Wen Congyang | } |
34 | fae001f5 | Wen Congyang | |
35 | fae001f5 | Wen Congyang | start_paddr = (pte & ~0xfff) & ~(0x1ULL << 63); |
36 | fae001f5 | Wen Congyang | if (cpu_physical_memory_is_io(start_paddr)) {
|
37 | fae001f5 | Wen Congyang | /* I/O region */
|
38 | fae001f5 | Wen Congyang | continue;
|
39 | fae001f5 | Wen Congyang | } |
40 | fae001f5 | Wen Congyang | |
41 | fae001f5 | Wen Congyang | start_vaddr = start_line_addr | ((i & 0x1fff) << 12); |
42 | fae001f5 | Wen Congyang | memory_mapping_list_add_merge_sorted(list, start_paddr, |
43 | fae001f5 | Wen Congyang | start_vaddr, 1 << 12); |
44 | fae001f5 | Wen Congyang | } |
45 | fae001f5 | Wen Congyang | } |
46 | fae001f5 | Wen Congyang | |
47 | fae001f5 | Wen Congyang | /* 32-bit Paging */
|
48 | fae001f5 | Wen Congyang | static void walk_pte2(MemoryMappingList *list, |
49 | a8170e5e | Avi Kivity | hwaddr pte_start_addr, int32_t a20_mask, |
50 | fae001f5 | Wen Congyang | target_ulong start_line_addr) |
51 | fae001f5 | Wen Congyang | { |
52 | a8170e5e | Avi Kivity | hwaddr pte_addr, start_paddr; |
53 | fae001f5 | Wen Congyang | uint32_t pte; |
54 | fae001f5 | Wen Congyang | target_ulong start_vaddr; |
55 | fae001f5 | Wen Congyang | int i;
|
56 | fae001f5 | Wen Congyang | |
57 | fae001f5 | Wen Congyang | for (i = 0; i < 1024; i++) { |
58 | fae001f5 | Wen Congyang | pte_addr = (pte_start_addr + i * 4) & a20_mask;
|
59 | fae001f5 | Wen Congyang | pte = ldl_phys(pte_addr); |
60 | fae001f5 | Wen Congyang | if (!(pte & PG_PRESENT_MASK)) {
|
61 | fae001f5 | Wen Congyang | /* not present */
|
62 | fae001f5 | Wen Congyang | continue;
|
63 | fae001f5 | Wen Congyang | } |
64 | fae001f5 | Wen Congyang | |
65 | fae001f5 | Wen Congyang | start_paddr = pte & ~0xfff;
|
66 | fae001f5 | Wen Congyang | if (cpu_physical_memory_is_io(start_paddr)) {
|
67 | fae001f5 | Wen Congyang | /* I/O region */
|
68 | fae001f5 | Wen Congyang | continue;
|
69 | fae001f5 | Wen Congyang | } |
70 | fae001f5 | Wen Congyang | |
71 | fae001f5 | Wen Congyang | start_vaddr = start_line_addr | ((i & 0x3ff) << 12); |
72 | fae001f5 | Wen Congyang | memory_mapping_list_add_merge_sorted(list, start_paddr, |
73 | fae001f5 | Wen Congyang | start_vaddr, 1 << 12); |
74 | fae001f5 | Wen Congyang | } |
75 | fae001f5 | Wen Congyang | } |
76 | fae001f5 | Wen Congyang | |
77 | fae001f5 | Wen Congyang | /* PAE Paging or IA-32e Paging */
|
78 | a8170e5e | Avi Kivity | static void walk_pde(MemoryMappingList *list, hwaddr pde_start_addr, |
79 | fae001f5 | Wen Congyang | int32_t a20_mask, target_ulong start_line_addr) |
80 | fae001f5 | Wen Congyang | { |
81 | a8170e5e | Avi Kivity | hwaddr pde_addr, pte_start_addr, start_paddr; |
82 | fae001f5 | Wen Congyang | uint64_t pde; |
83 | fae001f5 | Wen Congyang | target_ulong line_addr, start_vaddr; |
84 | fae001f5 | Wen Congyang | int i;
|
85 | fae001f5 | Wen Congyang | |
86 | fae001f5 | Wen Congyang | for (i = 0; i < 512; i++) { |
87 | fae001f5 | Wen Congyang | pde_addr = (pde_start_addr + i * 8) & a20_mask;
|
88 | fae001f5 | Wen Congyang | pde = ldq_phys(pde_addr); |
89 | fae001f5 | Wen Congyang | if (!(pde & PG_PRESENT_MASK)) {
|
90 | fae001f5 | Wen Congyang | /* not present */
|
91 | fae001f5 | Wen Congyang | continue;
|
92 | fae001f5 | Wen Congyang | } |
93 | fae001f5 | Wen Congyang | |
94 | fae001f5 | Wen Congyang | line_addr = start_line_addr | ((i & 0x1ff) << 21); |
95 | fae001f5 | Wen Congyang | if (pde & PG_PSE_MASK) {
|
96 | fae001f5 | Wen Congyang | /* 2 MB page */
|
97 | fae001f5 | Wen Congyang | start_paddr = (pde & ~0x1fffff) & ~(0x1ULL << 63); |
98 | fae001f5 | Wen Congyang | if (cpu_physical_memory_is_io(start_paddr)) {
|
99 | fae001f5 | Wen Congyang | /* I/O region */
|
100 | fae001f5 | Wen Congyang | continue;
|
101 | fae001f5 | Wen Congyang | } |
102 | fae001f5 | Wen Congyang | start_vaddr = line_addr; |
103 | fae001f5 | Wen Congyang | memory_mapping_list_add_merge_sorted(list, start_paddr, |
104 | fae001f5 | Wen Congyang | start_vaddr, 1 << 21); |
105 | fae001f5 | Wen Congyang | continue;
|
106 | fae001f5 | Wen Congyang | } |
107 | fae001f5 | Wen Congyang | |
108 | fae001f5 | Wen Congyang | pte_start_addr = (pde & ~0xfff) & a20_mask;
|
109 | fae001f5 | Wen Congyang | walk_pte(list, pte_start_addr, a20_mask, line_addr); |
110 | fae001f5 | Wen Congyang | } |
111 | fae001f5 | Wen Congyang | } |
112 | fae001f5 | Wen Congyang | |
113 | fae001f5 | Wen Congyang | /* 32-bit Paging */
|
114 | fae001f5 | Wen Congyang | static void walk_pde2(MemoryMappingList *list, |
115 | a8170e5e | Avi Kivity | hwaddr pde_start_addr, int32_t a20_mask, |
116 | fae001f5 | Wen Congyang | bool pse)
|
117 | fae001f5 | Wen Congyang | { |
118 | 6ad53bdf | Wen Congyang | hwaddr pde_addr, pte_start_addr, start_paddr, high_paddr; |
119 | fae001f5 | Wen Congyang | uint32_t pde; |
120 | fae001f5 | Wen Congyang | target_ulong line_addr, start_vaddr; |
121 | fae001f5 | Wen Congyang | int i;
|
122 | fae001f5 | Wen Congyang | |
123 | fae001f5 | Wen Congyang | for (i = 0; i < 1024; i++) { |
124 | fae001f5 | Wen Congyang | pde_addr = (pde_start_addr + i * 4) & a20_mask;
|
125 | fae001f5 | Wen Congyang | pde = ldl_phys(pde_addr); |
126 | fae001f5 | Wen Congyang | if (!(pde & PG_PRESENT_MASK)) {
|
127 | fae001f5 | Wen Congyang | /* not present */
|
128 | fae001f5 | Wen Congyang | continue;
|
129 | fae001f5 | Wen Congyang | } |
130 | fae001f5 | Wen Congyang | |
131 | fae001f5 | Wen Congyang | line_addr = (((unsigned int)i & 0x3ff) << 22); |
132 | fae001f5 | Wen Congyang | if ((pde & PG_PSE_MASK) && pse) {
|
133 | 6ad53bdf | Wen Congyang | /*
|
134 | 6ad53bdf | Wen Congyang | * 4 MB page:
|
135 | 6ad53bdf | Wen Congyang | * bits 39:32 are bits 20:13 of the PDE
|
136 | 6ad53bdf | Wen Congyang | * bit3 31:22 are bits 31:22 of the PDE
|
137 | 6ad53bdf | Wen Congyang | */
|
138 | 6ad53bdf | Wen Congyang | high_paddr = ((hwaddr)(pde & 0x1fe000) << 19); |
139 | 6ad53bdf | Wen Congyang | start_paddr = (pde & ~0x3fffff) | high_paddr;
|
140 | fae001f5 | Wen Congyang | if (cpu_physical_memory_is_io(start_paddr)) {
|
141 | fae001f5 | Wen Congyang | /* I/O region */
|
142 | fae001f5 | Wen Congyang | continue;
|
143 | fae001f5 | Wen Congyang | } |
144 | fae001f5 | Wen Congyang | start_vaddr = line_addr; |
145 | fae001f5 | Wen Congyang | memory_mapping_list_add_merge_sorted(list, start_paddr, |
146 | fae001f5 | Wen Congyang | start_vaddr, 1 << 22); |
147 | fae001f5 | Wen Congyang | continue;
|
148 | fae001f5 | Wen Congyang | } |
149 | fae001f5 | Wen Congyang | |
150 | fae001f5 | Wen Congyang | pte_start_addr = (pde & ~0xfff) & a20_mask;
|
151 | fae001f5 | Wen Congyang | walk_pte2(list, pte_start_addr, a20_mask, line_addr); |
152 | fae001f5 | Wen Congyang | } |
153 | fae001f5 | Wen Congyang | } |
154 | fae001f5 | Wen Congyang | |
155 | fae001f5 | Wen Congyang | /* PAE Paging */
|
156 | fae001f5 | Wen Congyang | static void walk_pdpe2(MemoryMappingList *list, |
157 | a8170e5e | Avi Kivity | hwaddr pdpe_start_addr, int32_t a20_mask) |
158 | fae001f5 | Wen Congyang | { |
159 | a8170e5e | Avi Kivity | hwaddr pdpe_addr, pde_start_addr; |
160 | fae001f5 | Wen Congyang | uint64_t pdpe; |
161 | fae001f5 | Wen Congyang | target_ulong line_addr; |
162 | fae001f5 | Wen Congyang | int i;
|
163 | fae001f5 | Wen Congyang | |
164 | fae001f5 | Wen Congyang | for (i = 0; i < 4; i++) { |
165 | fae001f5 | Wen Congyang | pdpe_addr = (pdpe_start_addr + i * 8) & a20_mask;
|
166 | fae001f5 | Wen Congyang | pdpe = ldq_phys(pdpe_addr); |
167 | fae001f5 | Wen Congyang | if (!(pdpe & PG_PRESENT_MASK)) {
|
168 | fae001f5 | Wen Congyang | /* not present */
|
169 | fae001f5 | Wen Congyang | continue;
|
170 | fae001f5 | Wen Congyang | } |
171 | fae001f5 | Wen Congyang | |
172 | fae001f5 | Wen Congyang | line_addr = (((unsigned int)i & 0x3) << 30); |
173 | fae001f5 | Wen Congyang | pde_start_addr = (pdpe & ~0xfff) & a20_mask;
|
174 | fae001f5 | Wen Congyang | walk_pde(list, pde_start_addr, a20_mask, line_addr); |
175 | fae001f5 | Wen Congyang | } |
176 | fae001f5 | Wen Congyang | } |
177 | fae001f5 | Wen Congyang | |
178 | fae001f5 | Wen Congyang | #ifdef TARGET_X86_64
|
179 | fae001f5 | Wen Congyang | /* IA-32e Paging */
|
180 | fae001f5 | Wen Congyang | static void walk_pdpe(MemoryMappingList *list, |
181 | a8170e5e | Avi Kivity | hwaddr pdpe_start_addr, int32_t a20_mask, |
182 | fae001f5 | Wen Congyang | target_ulong start_line_addr) |
183 | fae001f5 | Wen Congyang | { |
184 | a8170e5e | Avi Kivity | hwaddr pdpe_addr, pde_start_addr, start_paddr; |
185 | fae001f5 | Wen Congyang | uint64_t pdpe; |
186 | fae001f5 | Wen Congyang | target_ulong line_addr, start_vaddr; |
187 | fae001f5 | Wen Congyang | int i;
|
188 | fae001f5 | Wen Congyang | |
189 | fae001f5 | Wen Congyang | for (i = 0; i < 512; i++) { |
190 | fae001f5 | Wen Congyang | pdpe_addr = (pdpe_start_addr + i * 8) & a20_mask;
|
191 | fae001f5 | Wen Congyang | pdpe = ldq_phys(pdpe_addr); |
192 | fae001f5 | Wen Congyang | if (!(pdpe & PG_PRESENT_MASK)) {
|
193 | fae001f5 | Wen Congyang | /* not present */
|
194 | fae001f5 | Wen Congyang | continue;
|
195 | fae001f5 | Wen Congyang | } |
196 | fae001f5 | Wen Congyang | |
197 | fae001f5 | Wen Congyang | line_addr = start_line_addr | ((i & 0x1ffULL) << 30); |
198 | fae001f5 | Wen Congyang | if (pdpe & PG_PSE_MASK) {
|
199 | fae001f5 | Wen Congyang | /* 1 GB page */
|
200 | fae001f5 | Wen Congyang | start_paddr = (pdpe & ~0x3fffffff) & ~(0x1ULL << 63); |
201 | fae001f5 | Wen Congyang | if (cpu_physical_memory_is_io(start_paddr)) {
|
202 | fae001f5 | Wen Congyang | /* I/O region */
|
203 | fae001f5 | Wen Congyang | continue;
|
204 | fae001f5 | Wen Congyang | } |
205 | fae001f5 | Wen Congyang | start_vaddr = line_addr; |
206 | fae001f5 | Wen Congyang | memory_mapping_list_add_merge_sorted(list, start_paddr, |
207 | fae001f5 | Wen Congyang | start_vaddr, 1 << 30); |
208 | fae001f5 | Wen Congyang | continue;
|
209 | fae001f5 | Wen Congyang | } |
210 | fae001f5 | Wen Congyang | |
211 | fae001f5 | Wen Congyang | pde_start_addr = (pdpe & ~0xfff) & a20_mask;
|
212 | fae001f5 | Wen Congyang | walk_pde(list, pde_start_addr, a20_mask, line_addr); |
213 | fae001f5 | Wen Congyang | } |
214 | fae001f5 | Wen Congyang | } |
215 | fae001f5 | Wen Congyang | |
216 | fae001f5 | Wen Congyang | /* IA-32e Paging */
|
217 | fae001f5 | Wen Congyang | static void walk_pml4e(MemoryMappingList *list, |
218 | a8170e5e | Avi Kivity | hwaddr pml4e_start_addr, int32_t a20_mask) |
219 | fae001f5 | Wen Congyang | { |
220 | a8170e5e | Avi Kivity | hwaddr pml4e_addr, pdpe_start_addr; |
221 | fae001f5 | Wen Congyang | uint64_t pml4e; |
222 | fae001f5 | Wen Congyang | target_ulong line_addr; |
223 | fae001f5 | Wen Congyang | int i;
|
224 | fae001f5 | Wen Congyang | |
225 | fae001f5 | Wen Congyang | for (i = 0; i < 512; i++) { |
226 | fae001f5 | Wen Congyang | pml4e_addr = (pml4e_start_addr + i * 8) & a20_mask;
|
227 | fae001f5 | Wen Congyang | pml4e = ldq_phys(pml4e_addr); |
228 | fae001f5 | Wen Congyang | if (!(pml4e & PG_PRESENT_MASK)) {
|
229 | fae001f5 | Wen Congyang | /* not present */
|
230 | fae001f5 | Wen Congyang | continue;
|
231 | fae001f5 | Wen Congyang | } |
232 | fae001f5 | Wen Congyang | |
233 | fae001f5 | Wen Congyang | line_addr = ((i & 0x1ffULL) << 39) | (0xffffULL << 48); |
234 | fae001f5 | Wen Congyang | pdpe_start_addr = (pml4e & ~0xfff) & a20_mask;
|
235 | fae001f5 | Wen Congyang | walk_pdpe(list, pdpe_start_addr, a20_mask, line_addr); |
236 | fae001f5 | Wen Congyang | } |
237 | fae001f5 | Wen Congyang | } |
238 | fae001f5 | Wen Congyang | #endif
|
239 | fae001f5 | Wen Congyang | |
240 | fae001f5 | Wen Congyang | int cpu_get_memory_mapping(MemoryMappingList *list, CPUArchState *env)
|
241 | fae001f5 | Wen Congyang | { |
242 | 31a2207a | Wen Congyang | if (!cpu_paging_enabled(env)) {
|
243 | fae001f5 | Wen Congyang | /* paging is disabled */
|
244 | fae001f5 | Wen Congyang | return 0; |
245 | fae001f5 | Wen Congyang | } |
246 | fae001f5 | Wen Congyang | |
247 | fae001f5 | Wen Congyang | if (env->cr[4] & CR4_PAE_MASK) { |
248 | fae001f5 | Wen Congyang | #ifdef TARGET_X86_64
|
249 | fae001f5 | Wen Congyang | if (env->hflags & HF_LMA_MASK) {
|
250 | a8170e5e | Avi Kivity | hwaddr pml4e_addr; |
251 | fae001f5 | Wen Congyang | |
252 | fae001f5 | Wen Congyang | pml4e_addr = (env->cr[3] & ~0xfff) & env->a20_mask; |
253 | fae001f5 | Wen Congyang | walk_pml4e(list, pml4e_addr, env->a20_mask); |
254 | fae001f5 | Wen Congyang | } else
|
255 | fae001f5 | Wen Congyang | #endif
|
256 | fae001f5 | Wen Congyang | { |
257 | a8170e5e | Avi Kivity | hwaddr pdpe_addr; |
258 | fae001f5 | Wen Congyang | |
259 | fae001f5 | Wen Congyang | pdpe_addr = (env->cr[3] & ~0x1f) & env->a20_mask; |
260 | fae001f5 | Wen Congyang | walk_pdpe2(list, pdpe_addr, env->a20_mask); |
261 | fae001f5 | Wen Congyang | } |
262 | fae001f5 | Wen Congyang | } else {
|
263 | a8170e5e | Avi Kivity | hwaddr pde_addr; |
264 | fae001f5 | Wen Congyang | bool pse;
|
265 | fae001f5 | Wen Congyang | |
266 | fae001f5 | Wen Congyang | pde_addr = (env->cr[3] & ~0xfff) & env->a20_mask; |
267 | fae001f5 | Wen Congyang | pse = !!(env->cr[4] & CR4_PSE_MASK);
|
268 | fae001f5 | Wen Congyang | walk_pde2(list, pde_addr, env->a20_mask, pse); |
269 | fae001f5 | Wen Congyang | } |
270 | fae001f5 | Wen Congyang | |
271 | fae001f5 | Wen Congyang | return 0; |
272 | fae001f5 | Wen Congyang | } |
273 | 31a2207a | Wen Congyang | |
274 | 31a2207a | Wen Congyang | bool cpu_paging_enabled(CPUArchState *env)
|
275 | 31a2207a | Wen Congyang | { |
276 | 31a2207a | Wen Congyang | return env->cr[0] & CR0_PG_MASK; |
277 | 31a2207a | Wen Congyang | } |