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
30 #include "hw/sh_intc.h"
32 #if defined(CONFIG_USER_ONLY)
34 void do_interrupt (CPUState *env)
36 env->exception_index = -1;
39 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
40 int mmu_idx, int is_softmmu)
43 env->exception_index = 0;
46 env->exception_index = 0x0a0;
49 env->exception_index = 0x0c0;
52 env->exception_index = 0x0a0;
58 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
63 #else /* !CONFIG_USER_ONLY */
66 #define MMU_ITLB_MISS (-1)
67 #define MMU_ITLB_MULTIPLE (-2)
68 #define MMU_ITLB_VIOLATION (-3)
69 #define MMU_DTLB_MISS_READ (-4)
70 #define MMU_DTLB_MISS_WRITE (-5)
71 #define MMU_DTLB_INITIAL_WRITE (-6)
72 #define MMU_DTLB_VIOLATION_READ (-7)
73 #define MMU_DTLB_VIOLATION_WRITE (-8)
74 #define MMU_DTLB_MULTIPLE (-9)
75 #define MMU_DTLB_MISS (-10)
76 #define MMU_IADDR_ERROR (-11)
77 #define MMU_DADDR_ERROR_READ (-12)
78 #define MMU_DADDR_ERROR_WRITE (-13)
80 void do_interrupt(CPUState * env)
82 int do_irq = env->interrupt_request & CPU_INTERRUPT_HARD;
83 int do_exp, irq_vector = env->exception_index;
85 /* prioritize exceptions over interrupts */
87 do_exp = env->exception_index != -1;
88 do_irq = do_irq && (env->exception_index == -1);
90 if (env->sr & SR_BL) {
91 if (do_exp && env->exception_index != 0x1e0) {
92 env->exception_index = 0x000; /* masked exception -> reset */
94 if (do_irq && !env->intr_at_halt) {
97 env->intr_at_halt = 0;
101 irq_vector = sh_intc_get_pending_vector(env->intc_handle,
102 (env->sr >> 4) & 0xf);
103 if (irq_vector == -1) {
108 if (loglevel & CPU_LOG_INT) {
110 switch (env->exception_index) {
112 expname = "addr_error";
115 expname = "tlb_miss";
118 expname = "tlb_violation";
121 expname = "illegal_instruction";
124 expname = "slot_illegal_instruction";
127 expname = "fpu_disable";
130 expname = "slot_fpu";
133 expname = "data_write";
136 expname = "dtlb_miss_write";
139 expname = "dtlb_violation_write";
142 expname = "fpu_exception";
145 expname = "initial_page_write";
151 expname = do_irq ? "interrupt" : "???";
154 fprintf(logfile, "exception 0x%03x [%s] raised\n",
155 irq_vector, expname);
156 cpu_dump_state(env, logfile, fprintf, 0);
161 env->sgr = env->gregs[15];
162 env->sr |= SR_BL | SR_MD | SR_RB;
164 if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
165 /* Branch instruction should be executed again before delay slot. */
167 /* Clear flags for exception/interrupt routine. */
168 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
170 if (env->flags & DELAY_SLOT_CLEARME)
174 env->expevt = env->exception_index;
175 switch (env->exception_index) {
180 env->sr |= 0xf << 4; /* IMASK */
181 env->pc = 0xa0000000;
185 env->pc = env->vbr + 0x400;
188 env->spc += 2; /* special case for TRAPA */
191 env->pc = env->vbr + 0x100;
198 env->intevt = irq_vector;
199 env->pc = env->vbr + 0x600;
204 static void update_itlb_use(CPUState * env, int itlbnb)
206 uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
225 env->mmucr &= (and_mask << 24) | 0x00ffffff;
226 env->mmucr |= (or_mask << 24);
229 static int itlb_replacement(CPUState * env)
231 if ((env->mmucr & 0xe0000000) == 0xe0000000)
233 if ((env->mmucr & 0x98000000) == 0x18000000)
235 if ((env->mmucr & 0x54000000) == 0x04000000)
237 if ((env->mmucr & 0x2c000000) == 0x00000000)
242 /* Find the corresponding entry in the right TLB
243 Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
245 static int find_tlb_entry(CPUState * env, target_ulong address,
246 tlb_t * entries, uint8_t nbtlb, int use_asid)
248 int match = MMU_DTLB_MISS;
253 asid = env->pteh & 0xff;
255 for (i = 0; i < nbtlb; i++) {
257 continue; /* Invalid entry */
258 if (!entries[i].sh && use_asid && entries[i].asid != asid)
259 continue; /* Bad ASID */
261 switch (entries[i].sz) {
263 size = 1024; /* 1kB */
266 size = 4 * 1024; /* 4kB */
269 size = 64 * 1024; /* 64kB */
272 size = 1024 * 1024; /* 1MB */
278 start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
279 end = start + entries[i].size - 1;
280 if (address >= start && address <= end) { /* Match */
281 if (match != MMU_DTLB_MISS)
282 return MMU_DTLB_MULTIPLE; /* Multiple match */
289 static int same_tlb_entry_exists(const tlb_t * haystack, uint8_t nbtlb,
290 const tlb_t * needle)
293 for (i = 0; i < nbtlb; i++)
294 if (!memcmp(&haystack[i], needle, sizeof(tlb_t)))
299 static void increment_urc(CPUState * env)
304 urb = ((env->mmucr) >> 18) & 0x3f;
305 urc = ((env->mmucr) >> 10) & 0x3f;
307 if (urc == urb || urc == UTLB_SIZE - 1)
309 env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
312 /* Find itlb entry - update itlb from utlb if necessary and asked for
313 Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
314 Update the itlb from utlb if update is not 0
316 int find_itlb_entry(CPUState * env, target_ulong address,
317 int use_asid, int update)
321 e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
322 if (e == MMU_DTLB_MULTIPLE)
323 e = MMU_ITLB_MULTIPLE;
324 else if (e == MMU_DTLB_MISS && update) {
325 e = find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
328 n = itlb_replacement(env);
329 ientry = &env->itlb[n];
331 if (!same_tlb_entry_exists(env->utlb, UTLB_SIZE, ientry))
332 tlb_flush_page(env, ientry->vpn << 10);
334 *ientry = env->utlb[e];
336 } else if (e == MMU_DTLB_MISS)
338 } else if (e == MMU_DTLB_MISS)
341 update_itlb_use(env, e);
346 Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
347 int find_utlb_entry(CPUState * env, target_ulong address, int use_asid)
349 /* per utlb access */
353 return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
356 /* Match address against MMU
357 Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
358 MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
359 MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
360 MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
361 MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
363 static int get_mmu_address(CPUState * env, target_ulong * physical,
364 int *prot, target_ulong address,
365 int rw, int access_type)
368 tlb_t *matching = NULL;
370 use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
373 n = find_itlb_entry(env, address, use_asid, 1);
375 matching = &env->itlb[n];
376 if ((env->sr & SR_MD) & !(matching->pr & 2))
377 n = MMU_ITLB_VIOLATION;
382 n = find_utlb_entry(env, address, use_asid);
384 matching = &env->utlb[n];
385 switch ((matching->pr << 1) | ((env->sr & SR_MD) ? 1 : 0)) {
388 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
389 MMU_DTLB_VIOLATION_READ;
395 n = MMU_DTLB_VIOLATION_WRITE;
402 *prot = (rw == 1)? PAGE_WRITE : PAGE_READ;
405 } else if (n == MMU_DTLB_MISS) {
406 n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
411 *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
412 (address & (matching->size - 1));
413 if ((rw == 1) & !matching->d)
414 n = MMU_DTLB_INITIAL_WRITE;
421 int get_physical_address(CPUState * env, target_ulong * physical,
422 int *prot, target_ulong address,
423 int rw, int access_type)
425 /* P1, P2 and P4 areas do not use translation */
426 if ((address >= 0x80000000 && address < 0xc0000000) ||
427 address >= 0xe0000000) {
428 if (!(env->sr & SR_MD)
429 && (address < 0xe0000000 || address > 0xe4000000)) {
430 /* Unauthorized access in user mode (only store queues are available) */
431 fprintf(stderr, "Unauthorized access\n");
433 return MMU_DADDR_ERROR_READ;
435 return MMU_DADDR_ERROR_WRITE;
437 return MMU_IADDR_ERROR;
439 if (address >= 0x80000000 && address < 0xc0000000) {
440 /* Mask upper 3 bits for P1 and P2 areas */
441 *physical = address & 0x1fffffff;
445 *prot = PAGE_READ | PAGE_WRITE;
449 /* If MMU is disabled, return the corresponding physical page */
450 if (!env->mmucr & MMUCR_AT) {
451 *physical = address & 0x1FFFFFFF;
452 *prot = PAGE_READ | PAGE_WRITE;
456 /* We need to resort to the MMU */
457 return get_mmu_address(env, physical, prot, address, rw, access_type);
460 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
461 int mmu_idx, int is_softmmu)
463 target_ulong physical, page_offset, page_size;
464 int prot, ret, access_type;
466 access_type = ACCESS_INT;
468 get_physical_address(env, &physical, &prot, address, rw,
475 case MMU_DTLB_MISS_READ:
476 env->exception_index = 0x040;
478 case MMU_DTLB_MULTIPLE:
479 case MMU_ITLB_MULTIPLE:
480 env->exception_index = 0x140;
482 case MMU_ITLB_VIOLATION:
483 env->exception_index = 0x0a0;
485 case MMU_DTLB_MISS_WRITE:
486 env->exception_index = 0x060;
488 case MMU_DTLB_INITIAL_WRITE:
489 env->exception_index = 0x080;
491 case MMU_DTLB_VIOLATION_READ:
492 env->exception_index = 0x0a0;
494 case MMU_DTLB_VIOLATION_WRITE:
495 env->exception_index = 0x0c0;
497 case MMU_IADDR_ERROR:
498 case MMU_DADDR_ERROR_READ:
499 env->exception_index = 0x0c0;
501 case MMU_DADDR_ERROR_WRITE:
502 env->exception_index = 0x100;
510 page_size = TARGET_PAGE_SIZE;
512 (address - (address & TARGET_PAGE_MASK)) & ~(page_size - 1);
513 address = (address & TARGET_PAGE_MASK) + page_offset;
514 physical = (physical & TARGET_PAGE_MASK) + page_offset;
516 return tlb_set_page(env, address, physical, prot, mmu_idx, is_softmmu);
519 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
521 target_ulong physical;
524 get_physical_address(env, &physical, &prot, addr, 0, 0);
528 void cpu_load_tlb(CPUState * env)
530 int n = cpu_mmucr_urc(env->mmucr);
531 tlb_t * entry = &env->utlb[n];
534 /* Overwriting valid entry in utlb. */
535 target_ulong address = entry->vpn << 10;
536 if (!same_tlb_entry_exists(env->itlb, ITLB_SIZE, entry)) {
537 tlb_flush_page(env, address);
541 /* Take values into cpu status from registers. */
542 entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
543 entry->vpn = cpu_pteh_vpn(env->pteh);
544 entry->v = (uint8_t)cpu_ptel_v(env->ptel);
545 entry->ppn = cpu_ptel_ppn(env->ptel);
546 entry->sz = (uint8_t)cpu_ptel_sz(env->ptel);
549 entry->size = 1024; /* 1K */
552 entry->size = 1024 * 4; /* 4K */
555 entry->size = 1024 * 64; /* 64K */
558 entry->size = 1024 * 1024; /* 1M */
564 entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
565 entry->c = (uint8_t)cpu_ptel_c(env->ptel);
566 entry->pr = (uint8_t)cpu_ptel_pr(env->ptel);
567 entry->d = (uint8_t)cpu_ptel_d(env->ptel);
568 entry->wt = (uint8_t)cpu_ptel_wt(env->ptel);
569 entry->sa = (uint8_t)cpu_ptea_sa(env->ptea);
570 entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
573 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
576 int associate = addr & 0x0000080;
577 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
578 uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
579 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
580 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
581 int use_asid = (s->mmucr & MMUCR_SV) == 0 || (s->sr & SR_MD) == 0;
585 tlb_t * utlb_match_entry = NULL;
586 int needs_tlb_flush = 0;
589 for (i = 0; i < UTLB_SIZE; i++) {
590 tlb_t * entry = &s->utlb[i];
594 if (entry->vpn == vpn
595 && (!use_asid || entry->asid == asid || entry->sh)) {
596 if (utlb_match_entry) {
597 /* Multiple TLB Exception */
598 s->exception_index = 0x140;
606 utlb_match_entry = entry;
608 increment_urc(s); /* per utlb access */
612 for (i = 0; i < ITLB_SIZE; i++) {
613 tlb_t * entry = &s->itlb[i];
614 if (entry->vpn == vpn
615 && (!use_asid || entry->asid == asid || entry->sh)) {
618 if (utlb_match_entry)
619 *entry = *utlb_match_entry;
627 tlb_flush_page(s, vpn << 10);
630 int index = (addr & 0x00003f00) >> 8;
631 tlb_t * entry = &s->utlb[index];
633 /* Overwriting valid entry in utlb. */
634 target_ulong address = entry->vpn << 10;
635 if (!same_tlb_entry_exists(s->itlb, ITLB_SIZE, entry)) {
636 tlb_flush_page(s, address);