4 * Copyright (c) 2005 Samuel Tardieu
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31 #if defined(CONFIG_USER_ONLY)
33 void do_interrupt (CPUState *env)
35 env->exception_index = -1;
38 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
39 int mmu_idx, int is_softmmu)
44 env->exception_index = 0x0a0;
47 env->exception_index = 0x0c0;
50 env->exception_index = 0x0a0;
56 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
61 #else /* !CONFIG_USER_ONLY */
64 #define MMU_ITLB_MISS (-1)
65 #define MMU_ITLB_MULTIPLE (-2)
66 #define MMU_ITLB_VIOLATION (-3)
67 #define MMU_DTLB_MISS_READ (-4)
68 #define MMU_DTLB_MISS_WRITE (-5)
69 #define MMU_DTLB_INITIAL_WRITE (-6)
70 #define MMU_DTLB_VIOLATION_READ (-7)
71 #define MMU_DTLB_VIOLATION_WRITE (-8)
72 #define MMU_DTLB_MULTIPLE (-9)
73 #define MMU_DTLB_MISS (-10)
75 void do_interrupt(CPUState * env)
77 if (loglevel & CPU_LOG_INT) {
79 switch (env->exception_index) {
81 expname = "addr_error";
87 expname = "tlb_violation";
90 expname = "illegal_instruction";
93 expname = "slot_illegal_instruction";
96 expname = "fpu_disable";
102 expname = "data_write";
105 expname = "dtlb_miss_write";
108 expname = "dtlb_violation_write";
111 expname = "fpu_exception";
114 expname = "initial_page_write";
123 fprintf(logfile, "exception 0x%03x [%s] raised\n",
124 env->exception_index, expname);
125 cpu_dump_state(env, logfile, fprintf, 0);
130 env->sgr = env->gregs[15];
131 env->sr |= SR_BL | SR_MD | SR_RB;
133 env->expevt = env->exception_index & 0x7ff;
134 switch (env->exception_index) {
138 env->pc = env->vbr + 0x400;
141 env->pc = 0xa0000000;
144 env->pc = env->vbr + 0x100;
149 static void update_itlb_use(CPUState * env, int itlbnb)
151 uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
170 env->mmucr &= (and_mask << 24);
171 env->mmucr |= (or_mask << 24);
174 static int itlb_replacement(CPUState * env)
176 if ((env->mmucr & 0xe0000000) == 0xe0000000)
178 if ((env->mmucr & 0x98000000) == 0x08000000)
180 if ((env->mmucr & 0x54000000) == 0x04000000)
182 if ((env->mmucr & 0x2c000000) == 0x00000000)
187 /* Find the corresponding entry in the right TLB
188 Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
190 static int find_tlb_entry(CPUState * env, target_ulong address,
191 tlb_t * entries, uint8_t nbtlb, int use_asid)
193 int match = MMU_DTLB_MISS;
198 asid = env->pteh & 0xff;
200 for (i = 0; i < nbtlb; i++) {
202 continue; /* Invalid entry */
203 if (use_asid && entries[i].asid != asid && !entries[i].sh)
204 continue; /* Bad ASID */
206 switch (entries[i].sz) {
208 size = 1024; /* 1kB */
211 size = 4 * 1024; /* 4kB */
214 size = 64 * 1024; /* 64kB */
217 size = 1024 * 1024; /* 1MB */
223 start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
224 end = start + entries[i].size - 1;
225 if (address >= start && address <= end) { /* Match */
227 return MMU_DTLB_MULTIPLE; /* Multiple match */
234 /* Find itlb entry - update itlb from utlb if necessary and asked for
235 Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
236 Update the itlb from utlb if update is not 0
238 int find_itlb_entry(CPUState * env, target_ulong address,
239 int use_asid, int update)
243 e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
244 if (e == MMU_DTLB_MULTIPLE)
245 e = MMU_ITLB_MULTIPLE;
246 else if (e == MMU_DTLB_MISS && update) {
247 e = find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
249 n = itlb_replacement(env);
250 env->itlb[n] = env->utlb[e];
255 update_itlb_use(env, e);
260 Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
261 int find_utlb_entry(CPUState * env, target_ulong address, int use_asid)
266 urb = ((env->mmucr) >> 18) & 0x3f;
267 urc = ((env->mmucr) >> 10) & 0x3f;
269 if (urc == urb || urc == UTLB_SIZE - 1)
271 env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
274 return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
277 /* Match address against MMU
278 Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
279 MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
280 MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
281 MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION
283 static int get_mmu_address(CPUState * env, target_ulong * physical,
284 int *prot, target_ulong address,
285 int rw, int access_type)
287 int use_asid, is_code, n;
288 tlb_t *matching = NULL;
290 use_asid = (env->mmucr & MMUCR_SV) == 0 && (env->sr & SR_MD) == 0;
291 is_code = env->pc == address; /* Hack */
293 /* Use a hack to find if this is an instruction or data access */
294 if (env->pc == address && !(rw & PAGE_WRITE)) {
295 n = find_itlb_entry(env, address, use_asid, 1);
297 matching = &env->itlb[n];
298 if ((env->sr & SR_MD) & !(matching->pr & 2))
299 n = MMU_ITLB_VIOLATION;
304 n = find_utlb_entry(env, address, use_asid);
306 matching = &env->utlb[n];
307 switch ((matching->pr << 1) | ((env->sr & SR_MD) ? 1 : 0)) {
310 n = (rw & PAGE_WRITE) ? MMU_DTLB_VIOLATION_WRITE :
311 MMU_DTLB_VIOLATION_READ;
317 n = MMU_DTLB_VIOLATION_WRITE;
324 *prot = rw & (PAGE_READ | PAGE_WRITE);
327 } else if (n == MMU_DTLB_MISS) {
328 n = (rw & PAGE_WRITE) ? MMU_DTLB_MISS_WRITE :
333 *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
334 (address & (matching->size - 1));
335 if ((rw & PAGE_WRITE) & !matching->d)
336 n = MMU_DTLB_INITIAL_WRITE;
343 int get_physical_address(CPUState * env, target_ulong * physical,
344 int *prot, target_ulong address,
345 int rw, int access_type)
347 /* P1, P2 and P4 areas do not use translation */
348 if ((address >= 0x80000000 && address < 0xc0000000) ||
349 address >= 0xe0000000) {
350 if (!(env->sr & SR_MD)
351 && (address < 0xe0000000 || address > 0xe4000000)) {
352 /* Unauthorized access in user mode (only store queues are available) */
353 fprintf(stderr, "Unauthorized access\n");
354 return (rw & PAGE_WRITE) ? MMU_DTLB_MISS_WRITE :
357 /* Mask upper 3 bits */
358 *physical = address & 0x1FFFFFFF;
359 *prot = PAGE_READ | PAGE_WRITE;
363 /* If MMU is disabled, return the corresponding physical page */
364 if (!env->mmucr & MMUCR_AT) {
365 *physical = address & 0x1FFFFFFF;
366 *prot = PAGE_READ | PAGE_WRITE;
370 /* We need to resort to the MMU */
371 return get_mmu_address(env, physical, prot, address, rw, access_type);
374 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
375 int mmu_idx, int is_softmmu)
377 target_ulong physical, page_offset, page_size;
378 int prot, ret, access_type;
382 fprintf(stderr, "%s pc %08x ad %08x rw %d mmu_idx %d smmu %d\n",
383 __func__, env->pc, address, rw, mmu_idx, is_softmmu);
386 access_type = ACCESS_INT;
388 get_physical_address(env, &physical, &prot, address, rw,
395 case MMU_DTLB_MISS_READ:
396 env->exception_index = 0x040;
398 case MMU_DTLB_MULTIPLE:
399 case MMU_ITLB_MULTIPLE:
400 env->exception_index = 0x140;
402 case MMU_ITLB_VIOLATION:
403 env->exception_index = 0x0a0;
405 case MMU_DTLB_MISS_WRITE:
406 env->exception_index = 0x060;
408 case MMU_DTLB_INITIAL_WRITE:
409 env->exception_index = 0x080;
411 case MMU_DTLB_VIOLATION_READ:
412 env->exception_index = 0x0a0;
414 case MMU_DTLB_VIOLATION_WRITE:
415 env->exception_index = 0x0c0;
423 page_size = TARGET_PAGE_SIZE;
425 (address - (address & TARGET_PAGE_MASK)) & ~(page_size - 1);
426 address = (address & TARGET_PAGE_MASK) + page_offset;
427 physical = (physical & TARGET_PAGE_MASK) + page_offset;
429 return tlb_set_page(env, address, physical, prot, mmu_idx, is_softmmu);
432 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
434 target_ulong physical;
437 get_physical_address(env, &physical, &prot, addr, PAGE_READ, 0);