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, see <http://www.gnu.org/licenses/>.
19 #include "qemu/osdep.h"
22 #include "exec/exec-all.h"
25 #if !defined(CONFIG_USER_ONLY)
26 #include "hw/sh4/sh_intc.h"
29 #if defined(CONFIG_USER_ONLY)
31 void superh_cpu_do_interrupt(CPUState *cs)
33 cs->exception_index = -1;
36 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
39 SuperHCPU *cpu = SUPERH_CPU(cs);
40 CPUSH4State *env = &cpu->env;
43 cs->exception_index = -1;
46 cs->exception_index = 0x0a0;
49 cs->exception_index = 0x0c0;
52 cs->exception_index = 0x0a0;
58 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
60 /* For user mode, only U0 area is cacheable. */
61 return !(addr & 0x80000000);
64 #else /* !CONFIG_USER_ONLY */
67 #define MMU_ITLB_MISS (-1)
68 #define MMU_ITLB_MULTIPLE (-2)
69 #define MMU_ITLB_VIOLATION (-3)
70 #define MMU_DTLB_MISS_READ (-4)
71 #define MMU_DTLB_MISS_WRITE (-5)
72 #define MMU_DTLB_INITIAL_WRITE (-6)
73 #define MMU_DTLB_VIOLATION_READ (-7)
74 #define MMU_DTLB_VIOLATION_WRITE (-8)
75 #define MMU_DTLB_MULTIPLE (-9)
76 #define MMU_DTLB_MISS (-10)
77 #define MMU_IADDR_ERROR (-11)
78 #define MMU_DADDR_ERROR_READ (-12)
79 #define MMU_DADDR_ERROR_WRITE (-13)
81 void superh_cpu_do_interrupt(CPUState *cs)
83 SuperHCPU *cpu = SUPERH_CPU(cs);
84 CPUSH4State *env = &cpu->env;
85 int do_irq = cs->interrupt_request & CPU_INTERRUPT_HARD;
86 int do_exp, irq_vector = cs->exception_index;
88 /* prioritize exceptions over interrupts */
90 do_exp = cs->exception_index != -1;
91 do_irq = do_irq && (cs->exception_index == -1);
93 if (env->sr & (1u << SR_BL)) {
94 if (do_exp && cs->exception_index != 0x1e0) {
95 cs->exception_index = 0x000; /* masked exception -> reset */
97 if (do_irq && !env->in_sleep) {
104 irq_vector = sh_intc_get_pending_vector(env->intc_handle,
105 (env->sr >> 4) & 0xf);
106 if (irq_vector == -1) {
111 if (qemu_loglevel_mask(CPU_LOG_INT)) {
113 switch (cs->exception_index) {
115 expname = "addr_error";
118 expname = "tlb_miss";
121 expname = "tlb_violation";
124 expname = "illegal_instruction";
127 expname = "slot_illegal_instruction";
130 expname = "fpu_disable";
133 expname = "slot_fpu";
136 expname = "data_write";
139 expname = "dtlb_miss_write";
142 expname = "dtlb_violation_write";
145 expname = "fpu_exception";
148 expname = "initial_page_write";
154 expname = do_irq ? "interrupt" : "???";
157 qemu_log("exception 0x%03x [%s] raised\n",
158 irq_vector, expname);
159 log_cpu_state(cs, 0);
162 env->ssr = cpu_read_sr(env);
164 env->sgr = env->gregs[15];
165 env->sr |= (1u << SR_BL) | (1u << SR_MD) | (1u << SR_RB);
167 if (env->flags & (DELAY_SLOT | DELAY_SLOT_CONDITIONAL)) {
168 /* Branch instruction should be executed again before delay slot. */
170 /* Clear flags for exception/interrupt routine. */
171 env->flags &= ~(DELAY_SLOT | DELAY_SLOT_CONDITIONAL | DELAY_SLOT_TRUE);
173 if (env->flags & DELAY_SLOT_CLEARME)
177 env->expevt = cs->exception_index;
178 switch (cs->exception_index) {
182 env->sr &= ~(1u << SR_FD);
183 env->sr |= 0xf << 4; /* IMASK */
184 env->pc = 0xa0000000;
188 env->pc = env->vbr + 0x400;
191 env->spc += 2; /* special case for TRAPA */
194 env->pc = env->vbr + 0x100;
201 env->intevt = irq_vector;
202 env->pc = env->vbr + 0x600;
207 static void update_itlb_use(CPUSH4State * env, int itlbnb)
209 uint8_t or_mask = 0, and_mask = (uint8_t) - 1;
228 env->mmucr &= (and_mask << 24) | 0x00ffffff;
229 env->mmucr |= (or_mask << 24);
232 static int itlb_replacement(CPUSH4State * env)
234 SuperHCPU *cpu = sh_env_get_cpu(env);
236 if ((env->mmucr & 0xe0000000) == 0xe0000000) {
239 if ((env->mmucr & 0x98000000) == 0x18000000) {
242 if ((env->mmucr & 0x54000000) == 0x04000000) {
245 if ((env->mmucr & 0x2c000000) == 0x00000000) {
248 cpu_abort(CPU(cpu), "Unhandled itlb_replacement");
251 /* Find the corresponding entry in the right TLB
252 Return entry, MMU_DTLB_MISS or MMU_DTLB_MULTIPLE
254 static int find_tlb_entry(CPUSH4State * env, target_ulong address,
255 tlb_t * entries, uint8_t nbtlb, int use_asid)
257 int match = MMU_DTLB_MISS;
262 asid = env->pteh & 0xff;
264 for (i = 0; i < nbtlb; i++) {
266 continue; /* Invalid entry */
267 if (!entries[i].sh && use_asid && entries[i].asid != asid)
268 continue; /* Bad ASID */
269 start = (entries[i].vpn << 10) & ~(entries[i].size - 1);
270 end = start + entries[i].size - 1;
271 if (address >= start && address <= end) { /* Match */
272 if (match != MMU_DTLB_MISS)
273 return MMU_DTLB_MULTIPLE; /* Multiple match */
280 static void increment_urc(CPUSH4State * env)
285 urb = ((env->mmucr) >> 18) & 0x3f;
286 urc = ((env->mmucr) >> 10) & 0x3f;
288 if ((urb > 0 && urc > urb) || urc > (UTLB_SIZE - 1))
290 env->mmucr = (env->mmucr & 0xffff03ff) | (urc << 10);
293 /* Copy and utlb entry into itlb
296 static int copy_utlb_entry_itlb(CPUSH4State *env, int utlb)
301 itlb = itlb_replacement(env);
302 ientry = &env->itlb[itlb];
304 tlb_flush_page(CPU(sh_env_get_cpu(env)), ientry->vpn << 10);
306 *ientry = env->utlb[utlb];
307 update_itlb_use(env, itlb);
312 Return entry, MMU_ITLB_MISS, MMU_ITLB_MULTIPLE or MMU_DTLB_MULTIPLE
314 static int find_itlb_entry(CPUSH4State * env, target_ulong address,
319 e = find_tlb_entry(env, address, env->itlb, ITLB_SIZE, use_asid);
320 if (e == MMU_DTLB_MULTIPLE) {
321 e = MMU_ITLB_MULTIPLE;
322 } else if (e == MMU_DTLB_MISS) {
325 update_itlb_use(env, e);
331 Return entry, MMU_DTLB_MISS, MMU_DTLB_MULTIPLE */
332 static int find_utlb_entry(CPUSH4State * env, target_ulong address, int use_asid)
334 /* per utlb access */
338 return find_tlb_entry(env, address, env->utlb, UTLB_SIZE, use_asid);
341 /* Match address against MMU
342 Return MMU_OK, MMU_DTLB_MISS_READ, MMU_DTLB_MISS_WRITE,
343 MMU_DTLB_INITIAL_WRITE, MMU_DTLB_VIOLATION_READ,
344 MMU_DTLB_VIOLATION_WRITE, MMU_ITLB_MISS,
345 MMU_ITLB_MULTIPLE, MMU_ITLB_VIOLATION,
346 MMU_IADDR_ERROR, MMU_DADDR_ERROR_READ, MMU_DADDR_ERROR_WRITE.
348 static int get_mmu_address(CPUSH4State * env, target_ulong * physical,
349 int *prot, target_ulong address,
350 int rw, int access_type)
353 tlb_t *matching = NULL;
355 use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
358 n = find_itlb_entry(env, address, use_asid);
360 matching = &env->itlb[n];
361 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
362 n = MMU_ITLB_VIOLATION;
367 n = find_utlb_entry(env, address, use_asid);
369 n = copy_utlb_entry_itlb(env, n);
370 matching = &env->itlb[n];
371 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
372 n = MMU_ITLB_VIOLATION;
374 *prot = PAGE_READ | PAGE_EXEC;
375 if ((matching->pr & 1) && matching->d) {
379 } else if (n == MMU_DTLB_MULTIPLE) {
380 n = MMU_ITLB_MULTIPLE;
381 } else if (n == MMU_DTLB_MISS) {
386 n = find_utlb_entry(env, address, use_asid);
388 matching = &env->utlb[n];
389 if (!(env->sr & (1u << SR_MD)) && !(matching->pr & 2)) {
390 n = (rw == 1) ? MMU_DTLB_VIOLATION_WRITE :
391 MMU_DTLB_VIOLATION_READ;
392 } else if ((rw == 1) && !(matching->pr & 1)) {
393 n = MMU_DTLB_VIOLATION_WRITE;
394 } else if ((rw == 1) && !matching->d) {
395 n = MMU_DTLB_INITIAL_WRITE;
398 if ((matching->pr & 1) && matching->d) {
402 } else if (n == MMU_DTLB_MISS) {
403 n = (rw == 1) ? MMU_DTLB_MISS_WRITE :
409 *physical = ((matching->ppn << 10) & ~(matching->size - 1)) |
410 (address & (matching->size - 1));
415 static int get_physical_address(CPUSH4State * env, target_ulong * physical,
416 int *prot, target_ulong address,
417 int rw, int access_type)
419 /* P1, P2 and P4 areas do not use translation */
420 if ((address >= 0x80000000 && address < 0xc0000000) ||
421 address >= 0xe0000000) {
422 if (!(env->sr & (1u << SR_MD))
423 && (address < 0xe0000000 || address >= 0xe4000000)) {
424 /* Unauthorized access in user mode (only store queues are available) */
425 fprintf(stderr, "Unauthorized access\n");
427 return MMU_DADDR_ERROR_READ;
429 return MMU_DADDR_ERROR_WRITE;
431 return MMU_IADDR_ERROR;
433 if (address >= 0x80000000 && address < 0xc0000000) {
434 /* Mask upper 3 bits for P1 and P2 areas */
435 *physical = address & 0x1fffffff;
439 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
443 /* If MMU is disabled, return the corresponding physical page */
444 if (!(env->mmucr & MMUCR_AT)) {
445 *physical = address & 0x1FFFFFFF;
446 *prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
450 /* We need to resort to the MMU */
451 return get_mmu_address(env, physical, prot, address, rw, access_type);
454 int superh_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
457 SuperHCPU *cpu = SUPERH_CPU(cs);
458 CPUSH4State *env = &cpu->env;
459 target_ulong physical;
460 int prot, ret, access_type;
462 access_type = ACCESS_INT;
464 get_physical_address(env, &physical, &prot, address, rw,
469 if (ret != MMU_DTLB_MULTIPLE && ret != MMU_ITLB_MULTIPLE) {
470 env->pteh = (env->pteh & PTEH_ASID_MASK) |
471 (address & PTEH_VPN_MASK);
475 case MMU_DTLB_MISS_READ:
476 cs->exception_index = 0x040;
478 case MMU_DTLB_MULTIPLE:
479 case MMU_ITLB_MULTIPLE:
480 cs->exception_index = 0x140;
482 case MMU_ITLB_VIOLATION:
483 cs->exception_index = 0x0a0;
485 case MMU_DTLB_MISS_WRITE:
486 cs->exception_index = 0x060;
488 case MMU_DTLB_INITIAL_WRITE:
489 cs->exception_index = 0x080;
491 case MMU_DTLB_VIOLATION_READ:
492 cs->exception_index = 0x0a0;
494 case MMU_DTLB_VIOLATION_WRITE:
495 cs->exception_index = 0x0c0;
497 case MMU_IADDR_ERROR:
498 case MMU_DADDR_ERROR_READ:
499 cs->exception_index = 0x0e0;
501 case MMU_DADDR_ERROR_WRITE:
502 cs->exception_index = 0x100;
505 cpu_abort(cs, "Unhandled MMU fault");
510 address &= TARGET_PAGE_MASK;
511 physical &= TARGET_PAGE_MASK;
513 tlb_set_page(cs, address, physical, prot, mmu_idx, TARGET_PAGE_SIZE);
517 hwaddr superh_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
519 SuperHCPU *cpu = SUPERH_CPU(cs);
520 target_ulong physical;
523 get_physical_address(&cpu->env, &physical, &prot, addr, 0, 0);
527 void cpu_load_tlb(CPUSH4State * env)
529 SuperHCPU *cpu = sh_env_get_cpu(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 tlb_flush_page(CPU(cpu), address);
539 /* Take values into cpu status from registers. */
540 entry->asid = (uint8_t)cpu_pteh_asid(env->pteh);
541 entry->vpn = cpu_pteh_vpn(env->pteh);
542 entry->v = (uint8_t)cpu_ptel_v(env->ptel);
543 entry->ppn = cpu_ptel_ppn(env->ptel);
544 entry->sz = (uint8_t)cpu_ptel_sz(env->ptel);
547 entry->size = 1024; /* 1K */
550 entry->size = 1024 * 4; /* 4K */
553 entry->size = 1024 * 64; /* 64K */
556 entry->size = 1024 * 1024; /* 1M */
559 cpu_abort(CPU(cpu), "Unhandled load_tlb");
562 entry->sh = (uint8_t)cpu_ptel_sh(env->ptel);
563 entry->c = (uint8_t)cpu_ptel_c(env->ptel);
564 entry->pr = (uint8_t)cpu_ptel_pr(env->ptel);
565 entry->d = (uint8_t)cpu_ptel_d(env->ptel);
566 entry->wt = (uint8_t)cpu_ptel_wt(env->ptel);
567 entry->sa = (uint8_t)cpu_ptea_sa(env->ptea);
568 entry->tc = (uint8_t)cpu_ptea_tc(env->ptea);
571 void cpu_sh4_invalidate_tlb(CPUSH4State *s)
576 for (i = 0; i < UTLB_SIZE; i++) {
577 tlb_t * entry = &s->utlb[i];
581 for (i = 0; i < ITLB_SIZE; i++) {
582 tlb_t * entry = &s->itlb[i];
586 tlb_flush(CPU(sh_env_get_cpu(s)), 1);
589 uint32_t cpu_sh4_read_mmaped_itlb_addr(CPUSH4State *s,
592 int index = (addr & 0x00000300) >> 8;
593 tlb_t * entry = &s->itlb[index];
595 return (entry->vpn << 10) |
600 void cpu_sh4_write_mmaped_itlb_addr(CPUSH4State *s, hwaddr addr,
603 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
604 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
605 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
607 int index = (addr & 0x00000300) >> 8;
608 tlb_t * entry = &s->itlb[index];
610 /* Overwriting valid entry in itlb. */
611 target_ulong address = entry->vpn << 10;
612 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
619 uint32_t cpu_sh4_read_mmaped_itlb_data(CPUSH4State *s,
622 int array = (addr & 0x00800000) >> 23;
623 int index = (addr & 0x00000300) >> 8;
624 tlb_t * entry = &s->itlb[index];
627 /* ITLB Data Array 1 */
628 return (entry->ppn << 10) |
631 ((entry->sz & 1) << 6) |
632 ((entry->sz & 2) << 4) |
636 /* ITLB Data Array 2 */
637 return (entry->tc << 1) |
642 void cpu_sh4_write_mmaped_itlb_data(CPUSH4State *s, hwaddr addr,
645 int array = (addr & 0x00800000) >> 23;
646 int index = (addr & 0x00000300) >> 8;
647 tlb_t * entry = &s->itlb[index];
650 /* ITLB Data Array 1 */
652 /* Overwriting valid entry in utlb. */
653 target_ulong address = entry->vpn << 10;
654 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
656 entry->ppn = (mem_value & 0x1ffffc00) >> 10;
657 entry->v = (mem_value & 0x00000100) >> 8;
658 entry->sz = (mem_value & 0x00000080) >> 6 |
659 (mem_value & 0x00000010) >> 4;
660 entry->pr = (mem_value & 0x00000040) >> 5;
661 entry->c = (mem_value & 0x00000008) >> 3;
662 entry->sh = (mem_value & 0x00000002) >> 1;
664 /* ITLB Data Array 2 */
665 entry->tc = (mem_value & 0x00000008) >> 3;
666 entry->sa = (mem_value & 0x00000007);
670 uint32_t cpu_sh4_read_mmaped_utlb_addr(CPUSH4State *s,
673 int index = (addr & 0x00003f00) >> 8;
674 tlb_t * entry = &s->utlb[index];
676 increment_urc(s); /* per utlb access */
678 return (entry->vpn << 10) |
683 void cpu_sh4_write_mmaped_utlb_addr(CPUSH4State *s, hwaddr addr,
686 int associate = addr & 0x0000080;
687 uint32_t vpn = (mem_value & 0xfffffc00) >> 10;
688 uint8_t d = (uint8_t)((mem_value & 0x00000200) >> 9);
689 uint8_t v = (uint8_t)((mem_value & 0x00000100) >> 8);
690 uint8_t asid = (uint8_t)(mem_value & 0x000000ff);
691 int use_asid = !(s->mmucr & MMUCR_SV) || !(s->sr & (1u << SR_MD));
695 tlb_t * utlb_match_entry = NULL;
696 int needs_tlb_flush = 0;
699 for (i = 0; i < UTLB_SIZE; i++) {
700 tlb_t * entry = &s->utlb[i];
704 if (entry->vpn == vpn
705 && (!use_asid || entry->asid == asid || entry->sh)) {
706 if (utlb_match_entry) {
707 CPUState *cs = CPU(sh_env_get_cpu(s));
709 /* Multiple TLB Exception */
710 cs->exception_index = 0x140;
718 utlb_match_entry = entry;
720 increment_urc(s); /* per utlb access */
724 for (i = 0; i < ITLB_SIZE; i++) {
725 tlb_t * entry = &s->itlb[i];
726 if (entry->vpn == vpn
727 && (!use_asid || entry->asid == asid || entry->sh)) {
730 if (utlb_match_entry)
731 *entry = *utlb_match_entry;
738 if (needs_tlb_flush) {
739 tlb_flush_page(CPU(sh_env_get_cpu(s)), vpn << 10);
743 int index = (addr & 0x00003f00) >> 8;
744 tlb_t * entry = &s->utlb[index];
746 CPUState *cs = CPU(sh_env_get_cpu(s));
748 /* Overwriting valid entry in utlb. */
749 target_ulong address = entry->vpn << 10;
750 tlb_flush_page(cs, address);
760 uint32_t cpu_sh4_read_mmaped_utlb_data(CPUSH4State *s,
763 int array = (addr & 0x00800000) >> 23;
764 int index = (addr & 0x00003f00) >> 8;
765 tlb_t * entry = &s->utlb[index];
767 increment_urc(s); /* per utlb access */
770 /* ITLB Data Array 1 */
771 return (entry->ppn << 10) |
774 ((entry->sz & 1) << 6) |
775 ((entry->sz & 2) << 4) |
781 /* ITLB Data Array 2 */
782 return (entry->tc << 1) |
787 void cpu_sh4_write_mmaped_utlb_data(CPUSH4State *s, hwaddr addr,
790 int array = (addr & 0x00800000) >> 23;
791 int index = (addr & 0x00003f00) >> 8;
792 tlb_t * entry = &s->utlb[index];
794 increment_urc(s); /* per utlb access */
797 /* UTLB Data Array 1 */
799 /* Overwriting valid entry in utlb. */
800 target_ulong address = entry->vpn << 10;
801 tlb_flush_page(CPU(sh_env_get_cpu(s)), address);
803 entry->ppn = (mem_value & 0x1ffffc00) >> 10;
804 entry->v = (mem_value & 0x00000100) >> 8;
805 entry->sz = (mem_value & 0x00000080) >> 6 |
806 (mem_value & 0x00000010) >> 4;
807 entry->pr = (mem_value & 0x00000060) >> 5;
808 entry->c = (mem_value & 0x00000008) >> 3;
809 entry->d = (mem_value & 0x00000004) >> 2;
810 entry->sh = (mem_value & 0x00000002) >> 1;
811 entry->wt = (mem_value & 0x00000001);
813 /* UTLB Data Array 2 */
814 entry->tc = (mem_value & 0x00000008) >> 3;
815 entry->sa = (mem_value & 0x00000007);
819 int cpu_sh4_is_cached(CPUSH4State * env, target_ulong addr)
822 int use_asid = !(env->mmucr & MMUCR_SV) || !(env->sr & (1u << SR_MD));
825 if (env->sr & (1u << SR_MD)) {
826 /* For privileged mode, P2 and P4 area is not cacheable. */
827 if ((0xA0000000 <= addr && addr < 0xC0000000) || 0xE0000000 <= addr)
830 /* For user mode, only U0 area is cacheable. */
831 if (0x80000000 <= addr)
836 * TODO : Evaluate CCR and check if the cache is on or off.
837 * Now CCR is not in CPUSH4State, but in SH7750State.
838 * When you move the ccr into CPUSH4State, the code will be
842 /* check if operand cache is enabled or not. */
847 /* if MMU is off, no check for TLB. */
848 if (env->mmucr & MMUCR_AT)
852 n = find_tlb_entry(env, addr, env->itlb, ITLB_SIZE, use_asid);
854 return env->itlb[n].c;
856 n = find_tlb_entry(env, addr, env->utlb, UTLB_SIZE, use_asid);
858 return env->utlb[n].c;
865 bool superh_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
867 if (interrupt_request & CPU_INTERRUPT_HARD) {
868 superh_cpu_do_interrupt(cs);