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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 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 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
65 /* For user mode, only U0 area is cachable. */
66 return !(addr & 0x80000000);
69 #else /* !CONFIG_USER_ONLY */
72 #define MMU_ITLB_MISS (-1)
73 #define MMU_ITLB_MULTIPLE (-2)
74 #define MMU_ITLB_VIOLATION (-3)
75 #define MMU_DTLB_MISS_READ (-4)
76 #define MMU_DTLB_MISS_WRITE (-5)
77 #define MMU_DTLB_INITIAL_WRITE (-6)
78 #define MMU_DTLB_VIOLATION_READ (-7)
79 #define MMU_DTLB_VIOLATION_WRITE (-8)
80 #define MMU_DTLB_MULTIPLE (-9)
81 #define MMU_DTLB_MISS (-10)
82 #define MMU_IADDR_ERROR (-11)
83 #define MMU_DADDR_ERROR_READ (-12)
84 #define MMU_DADDR_ERROR_WRITE (-13)
86 void do_interrupt(CPUState * env)
88 int do_irq = env->interrupt_request & CPU_INTERRUPT_HARD;
89 int do_exp, irq_vector = env->exception_index;
91 /* prioritize exceptions over interrupts */
93 do_exp = env->exception_index != -1;
94 do_irq = do_irq && (env->exception_index == -1);
96 if (env->sr & SR_BL) {
97 if (do_exp && env->exception_index != 0x1e0) {
98 env->exception_index = 0x000; /* masked exception -> reset */
100 if (do_irq && !env->intr_at_halt) {
103 env->intr_at_halt = 0;
107 irq_vector = sh_intc_get_pending_vector(env->intc_handle,
108 (env->sr >> 4) & 0xf);
109 if (irq_vector == -1) {
114 if (qemu_loglevel_mask(CPU_LOG_INT)) {
116 switch (env->exception_index) {
118 expname = "addr_error";
121 expname = "tlb_miss";
124 expname = "tlb_violation";
127 expname = "illegal_instruction";
130 expname = "slot_illegal_instruction";
133 expname = "fpu_disable";
136 expname = "slot_fpu";
139 expname = "data_write";
142 expname = "dtlb_miss_write";
145 expname = "dtlb_violation_write";
148 expname = "fpu_exception";
151 expname = "initial_page_write";
157 expname = do_irq ? "interrupt" : "???";
160 qemu_log("exception 0x%03x [%s] raised\n",
161 irq_vector, expname);
162 log_cpu_state(env, 0);
167 env->sgr = env->gregs[15];
168 env->sr |= SR_BL | SR_MD | SR_RB;
170 if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
171 /* Branch instruction should be executed again before delay slot. */
173 /* Clear flags for exception/interrupt routine. */
174 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
176 if (env->flags & DELAY_SLOT_CLEARME)
180 env->expevt = env->exception_index;
181 switch (env->exception_index) {
186 env->sr |= 0xf << 4; /* IMASK */
187 env->pc = 0xa0000000;
191 env->pc = env->vbr + 0x400;
194 env->spc += 2; /* special case for TRAPA */
197 env->pc = env->vbr + 0x100;
204 env->intevt = irq_vector;
205 env->pc = env->vbr + 0x600;
210 static void update_itlb_use(CPUState * env, int itlbnb)
212 uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
231 env->mmucr &= (and_mask << 24) | 0x00ffffff;
232 env->mmucr |= (or_mask << 24);
235 static int itlb_replacement(CPUState * env)
237 if ((env->mmucr & 0xe0000000) == 0xe0000000)
239 if ((env->mmucr & 0x98000000) == 0x18000000)
241 if ((env->mmucr & 0x54000000) == 0x04000000)
243 if ((env->mmucr & 0x2c000000) == 0x00000000)
248 /* Find the corresponding entry in the right TLB
249 Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
251 static int find_tlb_entry(CPUState * env, target_ulong address,
252 tlb_t * entries, uint8_t nbtlb, int use_asid)
254 int match = MMU_DTLB_MISS;
259 asid = env->pteh & 0xff;
261 for (i = 0; i < nbtlb; i++) {
263 continue; /* Invalid entry */
264 if (!entries[i].sh && use_asid && entries[i].asid != asid)
265 continue; /* Bad ASID */
267 switch (entries[i].sz) {
269 size = 1024; /* 1kB */
272 size = 4 * 1024; /* 4kB */
275 size = 64 * 1024; /* 64kB */
278 size = 1024 * 1024; /* 1MB */
284 start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
285 end = start + entries[i].size - 1;
286 if (address >= start && address <= end) { /* Match */
287 if (match != MMU_DTLB_MISS)
288 return MMU_DTLB_MULTIPLE; /* Multiple match */
295 static int same_tlb_entry_exists(const tlb_t * haystack, uint8_t nbtlb,
296 const tlb_t * needle)
299 for (i = 0; i < nbtlb; i++)
300 if (!memcmp(&haystack[i], needle, sizeof(tlb_t)))
305 static void increment_urc(CPUState * env)
310 urb = ((env->mmucr) >> 18) & 0x3f;
311 urc = ((env->mmucr) >> 10) & 0x3f;
313 if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
315 env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
318 /* Find itlb entry - update itlb from utlb if necessary and asked for
319 Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
320 Update the itlb from utlb if update is not 0
322 static int find_itlb_entry(CPUState * env, target_ulong address,
323 int use_asid, int update)
327 e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
328 if (e == MMU_DTLB_MULTIPLE)
329 e = MMU_ITLB_MULTIPLE;
330 else if (e == MMU_DTLB_MISS && update) {
331 e = find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
334 n = itlb_replacement(env);
335 ientry = &env->itlb[n];
337 if (!same_tlb_entry_exists(env->utlb, UTLB_SIZE, ientry))
338 tlb_flush_page(env, ientry->vpn << 10);
340 *ientry = env->utlb[e];
342 } else if (e == MMU_DTLB_MISS)
344 } else if (e == MMU_DTLB_MISS)
347 update_itlb_use(env, e);
352 Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
353 static int find_utlb_entry(CPUState * env, target_ulong address, int use_asid)
355 /* per utlb access */
359 return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
362 /* Match address against MMU
363 Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
364 MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
365 MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
366 MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
367 MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
369 static int get_mmu_address(CPUState * env, target_ulong * physical,
370 int *prot, target_ulong address,
371 int rw, int access_type)
374 tlb_t *matching = NULL;
376 use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
379 n = find_itlb_entry(env, address, use_asid, 1);
381 matching = &env->itlb[n];
382 if ((env->sr & SR_MD) & !(matching->pr & 2))
383 n = MMU_ITLB_VIOLATION;
388 n = find_utlb_entry(env, address, use_asid);
390 matching = &env->utlb[n];
391 switch ((matching->pr << 1) | ((env->sr & SR_MD) ? 1 : 0)) {
394 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
395 MMU_DTLB_VIOLATION_READ;
401 n = MMU_DTLB_VIOLATION_WRITE;
408 *prot = (rw == 1)? PAGE_WRITE : PAGE_READ;
411 } else if (n == MMU_DTLB_MISS) {
412 n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
417 *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
418 (address & (matching->size - 1));
419 if ((rw == 1) & !matching->d)
420 n = MMU_DTLB_INITIAL_WRITE;
427 static int get_physical_address(CPUState * env, target_ulong * physical,
428 int *prot, target_ulong address,
429 int rw, int access_type)
431 /* P1, P2 and P4 areas do not use translation */
432 if ((address >= 0x80000000 && address < 0xc0000000) ||
433 address >= 0xe0000000) {
434 if (!(env->sr & SR_MD)
435 && (address < 0xe0000000 || address > 0xe4000000)) {
436 /* Unauthorized access in user mode (only store queues are available) */
437 fprintf(stderr, "Unauthorized access\n");
439 return MMU_DADDR_ERROR_READ;
441 return MMU_DADDR_ERROR_WRITE;
443 return MMU_IADDR_ERROR;
445 if (address >= 0x80000000 && address < 0xc0000000) {
446 /* Mask upper 3 bits for P1 and P2 areas */
447 *physical = address & 0x1fffffff;
451 *prot = PAGE_READ | PAGE_WRITE;
455 /* If MMU is disabled, return the corresponding physical page */
456 if (!env->mmucr & MMUCR_AT) {
457 *physical = address & 0x1FFFFFFF;
458 *prot = PAGE_READ | PAGE_WRITE;
462 /* We need to resort to the MMU */
463 return get_mmu_address(env, physical, prot, address, rw, access_type);
466 int cpu_sh4_handle_mmu_fault(CPUState * env, target_ulong address, int rw,
467 int mmu_idx, int is_softmmu)
469 target_ulong physical, page_offset, page_size;
470 int prot, ret, access_type;
472 access_type = ACCESS_INT;
474 get_physical_address(env, &physical, &prot, address, rw,
481 case MMU_DTLB_MISS_READ:
482 env->exception_index = 0x040;
484 case MMU_DTLB_MULTIPLE:
485 case MMU_ITLB_MULTIPLE:
486 env->exception_index = 0x140;
488 case MMU_ITLB_VIOLATION:
489 env->exception_index = 0x0a0;
491 case MMU_DTLB_MISS_WRITE:
492 env->exception_index = 0x060;
494 case MMU_DTLB_INITIAL_WRITE:
495 env->exception_index = 0x080;
497 case MMU_DTLB_VIOLATION_READ:
498 env->exception_index = 0x0a0;
500 case MMU_DTLB_VIOLATION_WRITE:
501 env->exception_index = 0x0c0;
503 case MMU_IADDR_ERROR:
504 case MMU_DADDR_ERROR_READ:
505 env->exception_index = 0x0c0;
507 case MMU_DADDR_ERROR_WRITE:
508 env->exception_index = 0x100;
516 page_size = TARGET_PAGE_SIZE;
518 (address - (address & TARGET_PAGE_MASK)) & ~(page_size - 1);
519 address = (address & TARGET_PAGE_MASK) + page_offset;
520 physical = (physical & TARGET_PAGE_MASK) + page_offset;
522 return tlb_set_page(env, address, physical, prot, mmu_idx, is_softmmu);
525 target_phys_addr_t cpu_get_phys_page_debug(CPUState * env, target_ulong addr)
527 target_ulong physical;
530 get_physical_address(env, &physical, &prot, addr, 0, 0);
534 void cpu_load_tlb(CPUSH4State * env)
536 int n = cpu_mmucr_urc(env->mmucr);
537 tlb_t * entry = &env->utlb[n];
540 /* Overwriting valid entry in utlb. */
541 target_ulong address = entry->vpn << 10;
542 if (!same_tlb_entry_exists(env->itlb, ITLB_SIZE, entry)) {
543 tlb_flush_page(env, address);
547 /* Take values into cpu status from registers. */
548 entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
549 entry->vpn = cpu_pteh_vpn(env->pteh);
550 entry->v = (uint8_t)cpu_ptel_v(env->ptel);
551 entry->ppn = cpu_ptel_ppn(env->ptel);
552 entry->sz = (uint8_t)cpu_ptel_sz(env->ptel);
555 entry->size = 1024; /* 1K */
558 entry->size = 1024 * 4; /* 4K */
561 entry->size = 1024 * 64; /* 64K */
564 entry->size = 1024 * 1024; /* 1M */
570 entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
571 entry->c = (uint8_t)cpu_ptel_c(env->ptel);
572 entry->pr = (uint8_t)cpu_ptel_pr(env->ptel);
573 entry->d = (uint8_t)cpu_ptel_d(env->ptel);
574 entry->wt = (uint8_t)cpu_ptel_wt(env->ptel);
575 entry->sa = (uint8_t)cpu_ptea_sa(env->ptea);
576 entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
579 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, target_phys_addr_t addr,
582 int associate = addr & 0x0000080;
583 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
584 uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
585 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
586 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
587 int use_asid = (s->mmucr & MMUCR_SV) == 0 || (s->sr & SR_MD) == 0;
591 tlb_t * utlb_match_entry = NULL;
592 int needs_tlb_flush = 0;
595 for (i = 0; i < UTLB_SIZE; i++) {
596 tlb_t * entry = &s->utlb[i];
600 if (entry->vpn == vpn
601 && (!use_asid || entry->asid == asid || entry->sh)) {
602 if (utlb_match_entry) {
603 /* Multiple TLB Exception */
604 s->exception_index = 0x140;
612 utlb_match_entry = entry;
614 increment_urc(s); /* per utlb access */
618 for (i = 0; i < ITLB_SIZE; i++) {
619 tlb_t * entry = &s->itlb[i];
620 if (entry->vpn == vpn
621 && (!use_asid || entry->asid == asid || entry->sh)) {
624 if (utlb_match_entry)
625 *entry = *utlb_match_entry;
633 tlb_flush_page(s, vpn << 10);
636 int index = (addr & 0x00003f00) >> 8;
637 tlb_t * entry = &s->utlb[index];
639 /* Overwriting valid entry in utlb. */
640 target_ulong address = entry->vpn << 10;
641 if (!same_tlb_entry_exists(s->itlb, ITLB_SIZE, entry)) {
642 tlb_flush_page(s, address);
653 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
656 int use_asid = (env->mmucr & MMUCR_SV) == 0 || (env->sr & SR_MD) == 0;
659 if (env->sr & SR_MD) {
660 /* For previledged mode, P2 and P4 area is not cachable. */
661 if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
664 /* For user mode, only U0 area is cachable. */
665 if (0x80000000 <= addr)
670 * TODO : Evaluate CCR and check if the cache is on or off.
671 * Now CCR is not in CPUSH4State, but in SH7750State.
672 * When you move the ccr inot CPUSH4State, the code will be
676 /* check if operand cache is enabled or not. */
681 /* if MMU is off, no check for TLB. */
682 if (env->mmucr & MMUCR_AT)
686 n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
688 return env->itlb[n].c;
690 n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
692 return env->utlb[n].c;