root / target-cris / mmu.c @ 463ce4ae
History | View | Annotate | Download (8.7 kB)
1 | 94cff60a | ths | /*
|
---|---|---|---|
2 | 94cff60a | ths | * CRIS mmu emulation.
|
3 | 94cff60a | ths | *
|
4 | 94cff60a | ths | * Copyright (c) 2007 AXIS Communications AB
|
5 | 94cff60a | ths | * Written by Edgar E. Iglesias.
|
6 | 94cff60a | ths | *
|
7 | 94cff60a | ths | * This library is free software; you can redistribute it and/or
|
8 | 94cff60a | ths | * modify it under the terms of the GNU Lesser General Public
|
9 | 94cff60a | ths | * License as published by the Free Software Foundation; either
|
10 | 94cff60a | ths | * version 2 of the License, or (at your option) any later version.
|
11 | 94cff60a | ths | *
|
12 | 94cff60a | ths | * This library is distributed in the hope that it will be useful,
|
13 | 94cff60a | ths | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
14 | 94cff60a | ths | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
15 | 94cff60a | ths | * Lesser General Public License for more details.
|
16 | 94cff60a | ths | *
|
17 | 94cff60a | ths | * You should have received a copy of the GNU Lesser General Public
|
18 | 8167ee88 | Blue Swirl | * License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
19 | 94cff60a | ths | */
|
20 | 94cff60a | ths | |
21 | 94cff60a | ths | #ifndef CONFIG_USER_ONLY
|
22 | 94cff60a | ths | |
23 | 94cff60a | ths | #include <stdio.h> |
24 | 94cff60a | ths | #include <string.h> |
25 | 94cff60a | ths | #include <stdlib.h> |
26 | 94cff60a | ths | |
27 | 94cff60a | ths | #include "config.h" |
28 | 94cff60a | ths | #include "cpu.h" |
29 | 94cff60a | ths | #include "mmu.h" |
30 | 94cff60a | ths | |
31 | d297f464 | edgar_igl | #ifdef DEBUG
|
32 | d297f464 | edgar_igl | #define D(x) x
|
33 | 02021c3f | Riccardo Magliocchetti | #define D_LOG(...) qemu_log(__VA_ARGS__)
|
34 | d297f464 | edgar_igl | #else
|
35 | 3ffd710e | Blue Swirl | #define D(x) do { } while (0) |
36 | d12d51d5 | aliguori | #define D_LOG(...) do { } while (0) |
37 | d297f464 | edgar_igl | #endif
|
38 | 94cff60a | ths | |
39 | 44cd42ee | edgar_igl | void cris_mmu_init(CPUState *env)
|
40 | 44cd42ee | edgar_igl | { |
41 | 44cd42ee | edgar_igl | env->mmu_rand_lfsr = 0xcccc;
|
42 | 44cd42ee | edgar_igl | } |
43 | 44cd42ee | edgar_igl | |
44 | 44cd42ee | edgar_igl | #define SR_POLYNOM 0x8805 |
45 | 44cd42ee | edgar_igl | static inline unsigned int compute_polynom(unsigned int sr) |
46 | 44cd42ee | edgar_igl | { |
47 | 44cd42ee | edgar_igl | unsigned int i; |
48 | 44cd42ee | edgar_igl | unsigned int f; |
49 | 44cd42ee | edgar_igl | |
50 | 44cd42ee | edgar_igl | f = 0;
|
51 | 44cd42ee | edgar_igl | for (i = 0; i < 16; i++) |
52 | 44cd42ee | edgar_igl | f += ((SR_POLYNOM >> i) & 1) & ((sr >> i) & 1); |
53 | 44cd42ee | edgar_igl | |
54 | 44cd42ee | edgar_igl | return f;
|
55 | 44cd42ee | edgar_igl | } |
56 | 44cd42ee | edgar_igl | |
57 | 253248a3 | Edgar E. Iglesias | static void cris_mmu_update_rand_lfsr(CPUState *env) |
58 | 253248a3 | Edgar E. Iglesias | { |
59 | 253248a3 | Edgar E. Iglesias | unsigned int f; |
60 | 253248a3 | Edgar E. Iglesias | |
61 | 253248a3 | Edgar E. Iglesias | /* Update lfsr at every fault. */
|
62 | 253248a3 | Edgar E. Iglesias | f = compute_polynom(env->mmu_rand_lfsr); |
63 | 253248a3 | Edgar E. Iglesias | env->mmu_rand_lfsr >>= 1;
|
64 | 253248a3 | Edgar E. Iglesias | env->mmu_rand_lfsr |= (f << 15);
|
65 | 253248a3 | Edgar E. Iglesias | env->mmu_rand_lfsr &= 0xffff;
|
66 | 253248a3 | Edgar E. Iglesias | } |
67 | 253248a3 | Edgar E. Iglesias | |
68 | ef29a70d | edgar_igl | static inline int cris_mmu_enabled(uint32_t rw_gc_cfg) |
69 | 94cff60a | ths | { |
70 | 94cff60a | ths | return (rw_gc_cfg & 12) != 0; |
71 | 94cff60a | ths | } |
72 | 94cff60a | ths | |
73 | ef29a70d | edgar_igl | static inline int cris_mmu_segmented_addr(int seg, uint32_t rw_mm_cfg) |
74 | 94cff60a | ths | { |
75 | 94cff60a | ths | return (1 << seg) & rw_mm_cfg; |
76 | 94cff60a | ths | } |
77 | 94cff60a | ths | |
78 | 94cff60a | ths | static uint32_t cris_mmu_translate_seg(CPUState *env, int seg) |
79 | 94cff60a | ths | { |
80 | 94cff60a | ths | uint32_t base; |
81 | 94cff60a | ths | int i;
|
82 | 94cff60a | ths | |
83 | 94cff60a | ths | if (seg < 8) |
84 | 94cff60a | ths | base = env->sregs[SFR_RW_MM_KBASE_LO]; |
85 | 94cff60a | ths | else
|
86 | 94cff60a | ths | base = env->sregs[SFR_RW_MM_KBASE_HI]; |
87 | 94cff60a | ths | |
88 | 94cff60a | ths | i = seg & 7;
|
89 | 94cff60a | ths | base >>= i * 4;
|
90 | 94cff60a | ths | base &= 15;
|
91 | 94cff60a | ths | |
92 | 94cff60a | ths | base <<= 28;
|
93 | 94cff60a | ths | return base;
|
94 | 94cff60a | ths | } |
95 | 94cff60a | ths | /* Used by the tlb decoder. */
|
96 | 94cff60a | ths | #define EXTRACT_FIELD(src, start, end) \
|
97 | 786c02f1 | edgar_igl | (((src) >> start) & ((1 << (end - start + 1)) - 1)) |
98 | 786c02f1 | edgar_igl | |
99 | 786c02f1 | edgar_igl | static inline void set_field(uint32_t *dst, unsigned int val, |
100 | 786c02f1 | edgar_igl | unsigned int offset, unsigned int width) |
101 | 786c02f1 | edgar_igl | { |
102 | 786c02f1 | edgar_igl | uint32_t mask; |
103 | 786c02f1 | edgar_igl | |
104 | 786c02f1 | edgar_igl | mask = (1 << width) - 1; |
105 | 786c02f1 | edgar_igl | mask <<= offset; |
106 | 786c02f1 | edgar_igl | val <<= offset; |
107 | 786c02f1 | edgar_igl | |
108 | 786c02f1 | edgar_igl | val &= mask; |
109 | 786c02f1 | edgar_igl | *dst &= ~(mask); |
110 | 786c02f1 | edgar_igl | *dst |= val; |
111 | 786c02f1 | edgar_igl | } |
112 | 94cff60a | ths | |
113 | d297f464 | edgar_igl | #ifdef DEBUG
|
114 | b41f7df0 | edgar_igl | static void dump_tlb(CPUState *env, int mmu) |
115 | b41f7df0 | edgar_igl | { |
116 | b41f7df0 | edgar_igl | int set;
|
117 | b41f7df0 | edgar_igl | int idx;
|
118 | b41f7df0 | edgar_igl | uint32_t hi, lo, tlb_vpn, tlb_pfn; |
119 | b41f7df0 | edgar_igl | |
120 | b41f7df0 | edgar_igl | for (set = 0; set < 4; set++) { |
121 | b41f7df0 | edgar_igl | for (idx = 0; idx < 16; idx++) { |
122 | b41f7df0 | edgar_igl | lo = env->tlbsets[mmu][set][idx].lo; |
123 | b41f7df0 | edgar_igl | hi = env->tlbsets[mmu][set][idx].hi; |
124 | b41f7df0 | edgar_igl | tlb_vpn = EXTRACT_FIELD(hi, 13, 31); |
125 | b41f7df0 | edgar_igl | tlb_pfn = EXTRACT_FIELD(lo, 13, 31); |
126 | b41f7df0 | edgar_igl | |
127 | b41f7df0 | edgar_igl | printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n",
|
128 | b41f7df0 | edgar_igl | set, idx, hi, lo, tlb_vpn, tlb_pfn); |
129 | b41f7df0 | edgar_igl | } |
130 | b41f7df0 | edgar_igl | } |
131 | b41f7df0 | edgar_igl | } |
132 | d297f464 | edgar_igl | #endif
|
133 | b41f7df0 | edgar_igl | |
134 | b41f7df0 | edgar_igl | /* rw 0 = read, 1 = write, 2 = exec. */
|
135 | 2fa73ec8 | Edgar E. Iglesias | static int cris_mmu_translate_page(struct cris_mmu_result *res, |
136 | 94cff60a | ths | CPUState *env, uint32_t vaddr, |
137 | 9f5a1fae | Edgar E. Iglesias | int rw, int usermode, int debug) |
138 | 94cff60a | ths | { |
139 | 94cff60a | ths | unsigned int vpage; |
140 | 94cff60a | ths | unsigned int idx; |
141 | b23761f9 | edgar_igl | uint32_t pid, lo, hi; |
142 | 786c02f1 | edgar_igl | uint32_t tlb_vpn, tlb_pfn = 0;
|
143 | 786c02f1 | edgar_igl | int tlb_pid, tlb_g, tlb_v, tlb_k, tlb_w, tlb_x;
|
144 | 786c02f1 | edgar_igl | int cfg_v, cfg_k, cfg_w, cfg_x;
|
145 | b41f7df0 | edgar_igl | int set, match = 0; |
146 | 786c02f1 | edgar_igl | uint32_t r_cause; |
147 | 786c02f1 | edgar_igl | uint32_t r_cfg; |
148 | 786c02f1 | edgar_igl | int rwcause;
|
149 | b41f7df0 | edgar_igl | int mmu = 1; /* Data mmu is default. */ |
150 | b41f7df0 | edgar_igl | int vect_base;
|
151 | 786c02f1 | edgar_igl | |
152 | 786c02f1 | edgar_igl | r_cause = env->sregs[SFR_R_MM_CAUSE]; |
153 | 786c02f1 | edgar_igl | r_cfg = env->sregs[SFR_RW_MM_CFG]; |
154 | 28de16da | edgar_igl | pid = env->pregs[PR_PID] & 0xff;
|
155 | b41f7df0 | edgar_igl | |
156 | b41f7df0 | edgar_igl | switch (rw) {
|
157 | b41f7df0 | edgar_igl | case 2: rwcause = CRIS_MMU_ERR_EXEC; mmu = 0; break; |
158 | b41f7df0 | edgar_igl | case 1: rwcause = CRIS_MMU_ERR_WRITE; break; |
159 | b41f7df0 | edgar_igl | default:
|
160 | b41f7df0 | edgar_igl | case 0: rwcause = CRIS_MMU_ERR_READ; break; |
161 | b41f7df0 | edgar_igl | } |
162 | b41f7df0 | edgar_igl | |
163 | b41f7df0 | edgar_igl | /* I exception vectors 4 - 7, D 8 - 11. */
|
164 | b41f7df0 | edgar_igl | vect_base = (mmu + 1) * 4; |
165 | 94cff60a | ths | |
166 | 94cff60a | ths | vpage = vaddr >> 13;
|
167 | 94cff60a | ths | |
168 | 94cff60a | ths | /* We know the index which to check on each set.
|
169 | 94cff60a | ths | Scan both I and D. */
|
170 | 786c02f1 | edgar_igl | #if 0
|
171 | b41f7df0 | edgar_igl | for (set = 0; set < 4; set++) {
|
172 | b41f7df0 | edgar_igl | for (idx = 0; idx < 16; idx++) {
|
173 | b41f7df0 | edgar_igl | lo = env->tlbsets[mmu][set][idx].lo;
|
174 | b41f7df0 | edgar_igl | hi = env->tlbsets[mmu][set][idx].hi;
|
175 | 786c02f1 | edgar_igl | tlb_vpn = EXTRACT_FIELD(hi, 13, 31);
|
176 | 786c02f1 | edgar_igl | tlb_pfn = EXTRACT_FIELD(lo, 13, 31);
|
177 | 786c02f1 | edgar_igl | |
178 | 786c02f1 | edgar_igl | printf ("TLB: [%d][%d] hi=%x lo=%x v=%x p=%x\n",
|
179 | b41f7df0 | edgar_igl | set, idx, hi, lo, tlb_vpn, tlb_pfn);
|
180 | 786c02f1 | edgar_igl | }
|
181 | 786c02f1 | edgar_igl | }
|
182 | 786c02f1 | edgar_igl | #endif
|
183 | b41f7df0 | edgar_igl | |
184 | b41f7df0 | edgar_igl | idx = vpage & 15;
|
185 | b41f7df0 | edgar_igl | for (set = 0; set < 4; set++) |
186 | 94cff60a | ths | { |
187 | b41f7df0 | edgar_igl | lo = env->tlbsets[mmu][set][idx].lo; |
188 | b41f7df0 | edgar_igl | hi = env->tlbsets[mmu][set][idx].hi; |
189 | 94cff60a | ths | |
190 | b23761f9 | edgar_igl | tlb_vpn = hi >> 13;
|
191 | 44cd42ee | edgar_igl | tlb_pid = EXTRACT_FIELD(hi, 0, 7); |
192 | 44cd42ee | edgar_igl | tlb_g = EXTRACT_FIELD(lo, 4, 4); |
193 | 94cff60a | ths | |
194 | d12d51d5 | aliguori | D_LOG("TLB[%d][%d][%d] v=%x vpage=%x lo=%x hi=%x\n",
|
195 | d12d51d5 | aliguori | mmu, set, idx, tlb_vpn, vpage, lo, hi); |
196 | b23761f9 | edgar_igl | if ((tlb_g || (tlb_pid == pid))
|
197 | 44cd42ee | edgar_igl | && tlb_vpn == vpage) { |
198 | 94cff60a | ths | match = 1;
|
199 | 94cff60a | ths | break;
|
200 | 94cff60a | ths | } |
201 | 94cff60a | ths | } |
202 | 94cff60a | ths | |
203 | b41f7df0 | edgar_igl | res->bf_vec = vect_base; |
204 | 94cff60a | ths | if (match) {
|
205 | 786c02f1 | edgar_igl | cfg_w = EXTRACT_FIELD(r_cfg, 19, 19); |
206 | 786c02f1 | edgar_igl | cfg_k = EXTRACT_FIELD(r_cfg, 18, 18); |
207 | 786c02f1 | edgar_igl | cfg_x = EXTRACT_FIELD(r_cfg, 17, 17); |
208 | 786c02f1 | edgar_igl | cfg_v = EXTRACT_FIELD(r_cfg, 16, 16); |
209 | 786c02f1 | edgar_igl | |
210 | 786c02f1 | edgar_igl | tlb_pfn = EXTRACT_FIELD(lo, 13, 31); |
211 | 786c02f1 | edgar_igl | tlb_v = EXTRACT_FIELD(lo, 3, 3); |
212 | 786c02f1 | edgar_igl | tlb_k = EXTRACT_FIELD(lo, 2, 2); |
213 | 786c02f1 | edgar_igl | tlb_w = EXTRACT_FIELD(lo, 1, 1); |
214 | 786c02f1 | edgar_igl | tlb_x = EXTRACT_FIELD(lo, 0, 0); |
215 | 786c02f1 | edgar_igl | |
216 | 786c02f1 | edgar_igl | /*
|
217 | 786c02f1 | edgar_igl | set_exception_vector(0x04, i_mmu_refill);
|
218 | 786c02f1 | edgar_igl | set_exception_vector(0x05, i_mmu_invalid);
|
219 | 786c02f1 | edgar_igl | set_exception_vector(0x06, i_mmu_access);
|
220 | 786c02f1 | edgar_igl | set_exception_vector(0x07, i_mmu_execute);
|
221 | 786c02f1 | edgar_igl | set_exception_vector(0x08, d_mmu_refill);
|
222 | 786c02f1 | edgar_igl | set_exception_vector(0x09, d_mmu_invalid);
|
223 | 786c02f1 | edgar_igl | set_exception_vector(0x0a, d_mmu_access);
|
224 | 786c02f1 | edgar_igl | set_exception_vector(0x0b, d_mmu_write);
|
225 | 786c02f1 | edgar_igl | */
|
226 | 44cd42ee | edgar_igl | if (cfg_k && tlb_k && usermode) {
|
227 | ef29a70d | edgar_igl | D(printf ("tlb: kernel protected %x lo=%x pc=%x\n",
|
228 | ef29a70d | edgar_igl | vaddr, lo, env->pc)); |
229 | ef29a70d | edgar_igl | match = 0;
|
230 | ef29a70d | edgar_igl | res->bf_vec = vect_base + 2;
|
231 | b41f7df0 | edgar_igl | } else if (rw == 1 && cfg_w && !tlb_w) { |
232 | ef29a70d | edgar_igl | D(printf ("tlb: write protected %x lo=%x pc=%x\n",
|
233 | ef29a70d | edgar_igl | vaddr, lo, env->pc)); |
234 | ef29a70d | edgar_igl | match = 0;
|
235 | ef29a70d | edgar_igl | /* write accesses never go through the I mmu. */
|
236 | ef29a70d | edgar_igl | res->bf_vec = vect_base + 3;
|
237 | ef29a70d | edgar_igl | } else if (rw == 2 && cfg_x && !tlb_x) { |
238 | ef29a70d | edgar_igl | D(printf ("tlb: exec protected %x lo=%x pc=%x\n",
|
239 | ef29a70d | edgar_igl | vaddr, lo, env->pc)); |
240 | 786c02f1 | edgar_igl | match = 0;
|
241 | b41f7df0 | edgar_igl | res->bf_vec = vect_base + 3;
|
242 | b41f7df0 | edgar_igl | } else if (cfg_v && !tlb_v) { |
243 | b41f7df0 | edgar_igl | D(printf ("tlb: invalid %x\n", vaddr));
|
244 | 786c02f1 | edgar_igl | match = 0;
|
245 | b41f7df0 | edgar_igl | res->bf_vec = vect_base + 1;
|
246 | 786c02f1 | edgar_igl | } |
247 | 786c02f1 | edgar_igl | |
248 | b41f7df0 | edgar_igl | res->prot = 0;
|
249 | b41f7df0 | edgar_igl | if (match) {
|
250 | b41f7df0 | edgar_igl | res->prot |= PAGE_READ; |
251 | b41f7df0 | edgar_igl | if (tlb_w)
|
252 | b41f7df0 | edgar_igl | res->prot |= PAGE_WRITE; |
253 | 58aebb94 | Edgar E. Iglesias | if (mmu == 0 && (cfg_x || tlb_x)) |
254 | b41f7df0 | edgar_igl | res->prot |= PAGE_EXEC; |
255 | b41f7df0 | edgar_igl | } |
256 | b41f7df0 | edgar_igl | else
|
257 | b41f7df0 | edgar_igl | D(dump_tlb(env, mmu)); |
258 | 44cd42ee | edgar_igl | } else {
|
259 | 44cd42ee | edgar_igl | /* If refill, provide a randomized set. */
|
260 | 44cd42ee | edgar_igl | set = env->mmu_rand_lfsr & 3;
|
261 | 786c02f1 | edgar_igl | } |
262 | 786c02f1 | edgar_igl | |
263 | 9f5a1fae | Edgar E. Iglesias | if (!match && !debug) {
|
264 | 253248a3 | Edgar E. Iglesias | cris_mmu_update_rand_lfsr(env); |
265 | 253248a3 | Edgar E. Iglesias | |
266 | 44cd42ee | edgar_igl | /* Compute index. */
|
267 | b41f7df0 | edgar_igl | idx = vpage & 15;
|
268 | b41f7df0 | edgar_igl | |
269 | b41f7df0 | edgar_igl | /* Update RW_MM_TLB_SEL. */
|
270 | b41f7df0 | edgar_igl | env->sregs[SFR_RW_MM_TLB_SEL] = 0;
|
271 | b41f7df0 | edgar_igl | set_field(&env->sregs[SFR_RW_MM_TLB_SEL], idx, 0, 4); |
272 | 44cd42ee | edgar_igl | set_field(&env->sregs[SFR_RW_MM_TLB_SEL], set, 4, 2); |
273 | b41f7df0 | edgar_igl | |
274 | b41f7df0 | edgar_igl | /* Update RW_MM_CAUSE. */
|
275 | b41f7df0 | edgar_igl | set_field(&r_cause, rwcause, 8, 2); |
276 | 786c02f1 | edgar_igl | set_field(&r_cause, vpage, 13, 19); |
277 | 28de16da | edgar_igl | set_field(&r_cause, pid, 0, 8); |
278 | 786c02f1 | edgar_igl | env->sregs[SFR_R_MM_CAUSE] = r_cause; |
279 | b41f7df0 | edgar_igl | D(printf("refill vaddr=%x pc=%x\n", vaddr, env->pc));
|
280 | 94cff60a | ths | } |
281 | b41f7df0 | edgar_igl | |
282 | b41f7df0 | edgar_igl | D(printf ("%s rw=%d mtch=%d pc=%x va=%x vpn=%x tlbvpn=%x pfn=%x pid=%x"
|
283 | b41f7df0 | edgar_igl | " %x cause=%x sel=%x sp=%x %x %x\n",
|
284 | b41f7df0 | edgar_igl | __func__, rw, match, env->pc, |
285 | 786c02f1 | edgar_igl | vaddr, vpage, |
286 | 786c02f1 | edgar_igl | tlb_vpn, tlb_pfn, tlb_pid, |
287 | 28de16da | edgar_igl | pid, |
288 | 786c02f1 | edgar_igl | r_cause, |
289 | 786c02f1 | edgar_igl | env->sregs[SFR_RW_MM_TLB_SEL], |
290 | b41f7df0 | edgar_igl | env->regs[R_SP], env->pregs[PR_USP], env->ksp)); |
291 | 786c02f1 | edgar_igl | |
292 | bf91ada5 | edgar_igl | res->phy = tlb_pfn << TARGET_PAGE_BITS; |
293 | 94cff60a | ths | return !match;
|
294 | 94cff60a | ths | } |
295 | 94cff60a | ths | |
296 | cf1d97f0 | edgar_igl | void cris_mmu_flush_pid(CPUState *env, uint32_t pid)
|
297 | 786c02f1 | edgar_igl | { |
298 | cf1d97f0 | edgar_igl | target_ulong vaddr; |
299 | cf1d97f0 | edgar_igl | unsigned int idx; |
300 | cf1d97f0 | edgar_igl | uint32_t lo, hi; |
301 | cf1d97f0 | edgar_igl | uint32_t tlb_vpn; |
302 | 80e1b265 | edgar_igl | int tlb_pid, tlb_g, tlb_v;
|
303 | cf1d97f0 | edgar_igl | unsigned int set; |
304 | cf1d97f0 | edgar_igl | unsigned int mmu; |
305 | cf1d97f0 | edgar_igl | |
306 | cf1d97f0 | edgar_igl | pid &= 0xff;
|
307 | cf1d97f0 | edgar_igl | for (mmu = 0; mmu < 2; mmu++) { |
308 | cf1d97f0 | edgar_igl | for (set = 0; set < 4; set++) |
309 | cf1d97f0 | edgar_igl | { |
310 | cf1d97f0 | edgar_igl | for (idx = 0; idx < 16; idx++) { |
311 | cf1d97f0 | edgar_igl | lo = env->tlbsets[mmu][set][idx].lo; |
312 | cf1d97f0 | edgar_igl | hi = env->tlbsets[mmu][set][idx].hi; |
313 | cf1d97f0 | edgar_igl | |
314 | cf1d97f0 | edgar_igl | tlb_vpn = EXTRACT_FIELD(hi, 13, 31); |
315 | cf1d97f0 | edgar_igl | tlb_pid = EXTRACT_FIELD(hi, 0, 7); |
316 | cf1d97f0 | edgar_igl | tlb_g = EXTRACT_FIELD(lo, 4, 4); |
317 | cf1d97f0 | edgar_igl | tlb_v = EXTRACT_FIELD(lo, 3, 3); |
318 | cf1d97f0 | edgar_igl | |
319 | 80e1b265 | edgar_igl | if (tlb_v && !tlb_g && (tlb_pid == pid)) {
|
320 | cf1d97f0 | edgar_igl | vaddr = tlb_vpn << TARGET_PAGE_BITS; |
321 | d12d51d5 | aliguori | D_LOG("flush pid=%x vaddr=%x\n",
|
322 | d12d51d5 | aliguori | pid, vaddr); |
323 | cf1d97f0 | edgar_igl | tlb_flush_page(env, vaddr); |
324 | cf1d97f0 | edgar_igl | } |
325 | cf1d97f0 | edgar_igl | } |
326 | cf1d97f0 | edgar_igl | } |
327 | cf1d97f0 | edgar_igl | } |
328 | 786c02f1 | edgar_igl | } |
329 | 786c02f1 | edgar_igl | |
330 | 2fa73ec8 | Edgar E. Iglesias | int cris_mmu_translate(struct cris_mmu_result *res, |
331 | 94cff60a | ths | CPUState *env, uint32_t vaddr, |
332 | 9f5a1fae | Edgar E. Iglesias | int rw, int mmu_idx, int debug) |
333 | 94cff60a | ths | { |
334 | 94cff60a | ths | int seg;
|
335 | 94cff60a | ths | int miss = 0; |
336 | 786c02f1 | edgar_igl | int is_user = mmu_idx == MMU_USER_IDX;
|
337 | b41f7df0 | edgar_igl | uint32_t old_srs; |
338 | b41f7df0 | edgar_igl | |
339 | b41f7df0 | edgar_igl | old_srs= env->pregs[PR_SRS]; |
340 | b41f7df0 | edgar_igl | |
341 | b41f7df0 | edgar_igl | /* rw == 2 means exec, map the access to the insn mmu. */
|
342 | b41f7df0 | edgar_igl | env->pregs[PR_SRS] = rw == 2 ? 1 : 2; |
343 | 94cff60a | ths | |
344 | 94cff60a | ths | if (!cris_mmu_enabled(env->sregs[SFR_RW_GC_CFG])) {
|
345 | 94cff60a | ths | res->phy = vaddr; |
346 | b23761f9 | edgar_igl | res->prot = PAGE_BITS; |
347 | b41f7df0 | edgar_igl | goto done;
|
348 | 94cff60a | ths | } |
349 | 94cff60a | ths | |
350 | 94cff60a | ths | seg = vaddr >> 28;
|
351 | 218951ef | Edgar E. Iglesias | if (!is_user && cris_mmu_segmented_addr(seg, env->sregs[SFR_RW_MM_CFG]))
|
352 | 94cff60a | ths | { |
353 | 94cff60a | ths | uint32_t base; |
354 | 94cff60a | ths | |
355 | 94cff60a | ths | miss = 0;
|
356 | 94cff60a | ths | base = cris_mmu_translate_seg(env, seg); |
357 | 0d84be5b | Blue Swirl | res->phy = base | (0x0fffffff & vaddr);
|
358 | b23761f9 | edgar_igl | res->prot = PAGE_BITS; |
359 | 9f5a1fae | Edgar E. Iglesias | } else {
|
360 | 9f5a1fae | Edgar E. Iglesias | miss = cris_mmu_translate_page(res, env, vaddr, rw, |
361 | 9f5a1fae | Edgar E. Iglesias | is_user, debug); |
362 | 94cff60a | ths | } |
363 | b41f7df0 | edgar_igl | done:
|
364 | b41f7df0 | edgar_igl | env->pregs[PR_SRS] = old_srs; |
365 | 94cff60a | ths | return miss;
|
366 | 94cff60a | ths | } |
367 | 94cff60a | ths | #endif |