4 * Copyright (c) 2009 Ulrich Hecht
5 * Copyright (c) 2011 Alexander Graf
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
22 #include "exec/gdbstub.h"
23 #include "qemu/timer.h"
24 #ifndef CONFIG_USER_ONLY
25 #include "sysemu/sysemu.h"
29 //#define DEBUG_S390_PTE
30 //#define DEBUG_S390_STDOUT
33 #ifdef DEBUG_S390_STDOUT
34 #define DPRINTF(fmt, ...) \
35 do { fprintf(stderr, fmt, ## __VA_ARGS__); \
36 qemu_log(fmt, ##__VA_ARGS__); } while (0)
38 #define DPRINTF(fmt, ...) \
39 do { qemu_log(fmt, ## __VA_ARGS__); } while (0)
42 #define DPRINTF(fmt, ...) \
47 #define PTE_DPRINTF DPRINTF
49 #define PTE_DPRINTF(fmt, ...) \
53 #ifndef CONFIG_USER_ONLY
54 void s390x_tod_timer(void *opaque)
56 S390CPU *cpu = opaque;
57 CPUS390XState *env = &cpu->env;
59 env->pending_int |= INTERRUPT_TOD;
60 cpu_interrupt(env, CPU_INTERRUPT_HARD);
63 void s390x_cpu_timer(void *opaque)
65 S390CPU *cpu = opaque;
66 CPUS390XState *env = &cpu->env;
68 env->pending_int |= INTERRUPT_CPUTIMER;
69 cpu_interrupt(env, CPU_INTERRUPT_HARD);
73 S390CPU *cpu_s390x_init(const char *cpu_model)
78 cpu = S390_CPU(object_new(TYPE_S390_CPU));
80 env->cpu_model_str = cpu_model;
82 object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
87 #if defined(CONFIG_USER_ONLY)
89 void do_interrupt(CPUS390XState *env)
91 env->exception_index = -1;
94 int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong address,
97 env->exception_index = EXCP_PGM;
98 env->int_pgm_code = PGM_ADDRESSING;
99 /* On real machines this value is dropped into LowMem. Since this
100 is userland, simply put this someplace that cpu_loop can find it. */
101 env->__excp_addr = address;
105 #else /* !CONFIG_USER_ONLY */
107 /* Ensure to exit the TB after this call! */
108 static void trigger_pgm_exception(CPUS390XState *env, uint32_t code,
111 env->exception_index = EXCP_PGM;
112 env->int_pgm_code = code;
113 env->int_pgm_ilen = ilen;
116 static int trans_bits(CPUS390XState *env, uint64_t mode)
121 case PSW_ASC_PRIMARY:
124 case PSW_ASC_SECONDARY:
131 cpu_abort(env, "unknown asc mode\n");
138 static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
141 int ilen = ILEN_LATER_INC;
142 int bits = trans_bits(env, mode) | 4;
144 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
146 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
147 trigger_pgm_exception(env, PGM_PROTECTION, ilen);
150 static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
151 uint32_t type, uint64_t asc, int rw)
153 int ilen = ILEN_LATER;
154 int bits = trans_bits(env, asc);
156 /* Code accesses have an undefined ilc. */
161 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
163 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
164 trigger_pgm_exception(env, type, ilen);
167 static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
168 uint64_t asc, uint64_t asce, int level,
169 target_ulong *raddr, int *flags, int rw)
175 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __func__, asce);
177 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
178 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
179 /* XXX different regions have different faults */
180 DPRINTF("%s: invalid region\n", __func__);
181 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
185 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
186 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
190 if (asce & _ASCE_REAL_SPACE) {
197 origin = asce & _ASCE_ORIGIN;
200 case _ASCE_TYPE_REGION1 + 4:
201 offs = (vaddr >> 50) & 0x3ff8;
203 case _ASCE_TYPE_REGION1:
204 offs = (vaddr >> 39) & 0x3ff8;
206 case _ASCE_TYPE_REGION2:
207 offs = (vaddr >> 28) & 0x3ff8;
209 case _ASCE_TYPE_REGION3:
210 offs = (vaddr >> 17) & 0x3ff8;
212 case _ASCE_TYPE_SEGMENT:
213 offs = (vaddr >> 9) & 0x07f8;
214 origin = asce & _SEGMENT_ENTRY_ORIGIN;
218 /* XXX region protection flags */
219 /* *flags &= ~PAGE_WRITE */
221 new_asce = ldq_phys(origin + offs);
222 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
223 __func__, origin, offs, new_asce);
225 if (level != _ASCE_TYPE_SEGMENT) {
226 /* yet another region */
227 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
232 if (new_asce & _PAGE_INVALID) {
233 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, new_asce);
234 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
238 if (new_asce & _PAGE_RO) {
239 *flags &= ~PAGE_WRITE;
242 *raddr = new_asce & _ASCE_ORIGIN;
244 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, new_asce);
249 static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
250 uint64_t asc, target_ulong *raddr, int *flags,
254 int level, new_level;
258 case PSW_ASC_PRIMARY:
259 PTE_DPRINTF("%s: asc=primary\n", __func__);
260 asce = env->cregs[1];
262 case PSW_ASC_SECONDARY:
263 PTE_DPRINTF("%s: asc=secondary\n", __func__);
264 asce = env->cregs[7];
267 PTE_DPRINTF("%s: asc=home\n", __func__);
268 asce = env->cregs[13];
272 switch (asce & _ASCE_TYPE_MASK) {
273 case _ASCE_TYPE_REGION1:
275 case _ASCE_TYPE_REGION2:
276 if (vaddr & 0xffe0000000000000ULL) {
277 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
278 " 0xffe0000000000000ULL\n", __func__, vaddr);
279 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
283 case _ASCE_TYPE_REGION3:
284 if (vaddr & 0xfffffc0000000000ULL) {
285 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
286 " 0xfffffc0000000000ULL\n", __func__, vaddr);
287 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
291 case _ASCE_TYPE_SEGMENT:
292 if (vaddr & 0xffffffff80000000ULL) {
293 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
294 " 0xffffffff80000000ULL\n", __func__, vaddr);
295 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
301 /* fake level above current */
302 level = asce & _ASCE_TYPE_MASK;
303 new_level = level + 4;
304 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
306 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
308 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
309 trigger_prot_fault(env, vaddr, asc);
316 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
317 target_ulong *raddr, int *flags)
322 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
323 vaddr &= TARGET_PAGE_MASK;
325 if (!(env->psw.mask & PSW_MASK_DAT)) {
332 case PSW_ASC_PRIMARY:
334 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
336 case PSW_ASC_SECONDARY:
338 * Instruction: Primary
342 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
344 *flags &= ~(PAGE_READ | PAGE_WRITE);
346 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
348 *flags &= ~(PAGE_EXEC);
353 hw_error("guest switched to unknown asc mode\n");
358 /* Convert real address -> absolute address */
359 if (*raddr < 0x2000) {
360 *raddr = *raddr + env->psa;
363 if (*raddr <= ram_size) {
364 sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
365 if (*flags & PAGE_READ) {
369 if (*flags & PAGE_WRITE) {
377 int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong orig_vaddr,
380 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
381 target_ulong vaddr, raddr;
384 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
385 __func__, orig_vaddr, rw, mmu_idx);
387 orig_vaddr &= TARGET_PAGE_MASK;
391 if (!(env->psw.mask & PSW_MASK_64)) {
395 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
396 /* Translation ended in exception */
400 /* check out of RAM access */
401 if (raddr > (ram_size + virtio_size)) {
402 DPRINTF("%s: raddr %" PRIx64 " > ram_size %" PRIx64 "\n", __func__,
403 (uint64_t)raddr, (uint64_t)ram_size);
404 trigger_pgm_exception(env, PGM_ADDRESSING, ILEN_LATER);
408 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __func__,
409 (uint64_t)vaddr, (uint64_t)raddr, prot);
411 tlb_set_page(env, orig_vaddr, raddr, prot,
412 mmu_idx, TARGET_PAGE_SIZE);
417 hwaddr cpu_get_phys_page_debug(CPUS390XState *env,
421 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
422 int old_exc = env->exception_index;
423 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
426 if (!(env->psw.mask & PSW_MASK_64)) {
430 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
431 env->exception_index = old_exc;
436 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
438 if (mask & PSW_MASK_WAIT) {
439 S390CPU *cpu = s390_env_get_cpu(env);
440 CPUState *cs = CPU(cpu);
441 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
442 if (s390_del_running_cpu(cpu) == 0) {
443 #ifndef CONFIG_USER_ONLY
444 qemu_system_shutdown_request();
449 env->exception_index = EXCP_HLT;
452 env->psw.addr = addr;
453 env->psw.mask = mask;
454 env->cc_op = (mask >> 44) & 3;
457 static uint64_t get_psw_mask(CPUS390XState *env)
461 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
465 assert(!(env->cc_op & ~3));
466 r |= (uint64_t)env->cc_op << 44;
471 static LowCore *cpu_map_lowcore(CPUS390XState *env)
474 hwaddr len = sizeof(LowCore);
476 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
478 if (len < sizeof(LowCore)) {
479 cpu_abort(env, "Could not map lowcore\n");
485 static void cpu_unmap_lowcore(LowCore *lowcore)
487 cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore));
490 void *s390_cpu_physical_memory_map(CPUS390XState *env, hwaddr addr, hwaddr *len,
495 /* Mind the prefix area. */
497 /* Map the lowcore. */
499 *len = MIN(*len, 8192 - addr);
500 } else if ((addr >= env->psa) && (addr < env->psa + 8192)) {
501 /* Map the 0 page. */
503 *len = MIN(*len, 8192 - start);
506 return cpu_physical_memory_map(start, len, is_write);
509 void s390_cpu_physical_memory_unmap(CPUS390XState *env, void *addr, hwaddr len,
512 cpu_physical_memory_unmap(addr, len, is_write, len);
515 static void do_svc_interrupt(CPUS390XState *env)
520 lowcore = cpu_map_lowcore(env);
522 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
523 lowcore->svc_ilen = cpu_to_be16(env->int_svc_ilen);
524 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
525 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + env->int_svc_ilen);
526 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
527 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
529 cpu_unmap_lowcore(lowcore);
531 load_psw(env, mask, addr);
534 static void do_program_interrupt(CPUS390XState *env)
538 int ilen = env->int_pgm_ilen;
542 ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
545 ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
546 env->psw.addr += ilen;
549 assert(ilen == 2 || ilen == 4 || ilen == 6);
552 qemu_log_mask(CPU_LOG_INT, "%s: code=0x%x ilen=%d\n",
553 __func__, env->int_pgm_code, ilen);
555 lowcore = cpu_map_lowcore(env);
557 lowcore->pgm_ilen = cpu_to_be16(ilen);
558 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
559 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
560 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
561 mask = be64_to_cpu(lowcore->program_new_psw.mask);
562 addr = be64_to_cpu(lowcore->program_new_psw.addr);
564 cpu_unmap_lowcore(lowcore);
566 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __func__,
567 env->int_pgm_code, ilen, env->psw.mask,
570 load_psw(env, mask, addr);
573 #define VIRTIO_SUBCODE_64 0x0D00
575 static void do_ext_interrupt(CPUS390XState *env)
581 if (!(env->psw.mask & PSW_MASK_EXT)) {
582 cpu_abort(env, "Ext int w/o ext mask\n");
585 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
586 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
589 q = &env->ext_queue[env->ext_index];
590 lowcore = cpu_map_lowcore(env);
592 lowcore->ext_int_code = cpu_to_be16(q->code);
593 lowcore->ext_params = cpu_to_be32(q->param);
594 lowcore->ext_params2 = cpu_to_be64(q->param64);
595 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
596 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
597 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
598 mask = be64_to_cpu(lowcore->external_new_psw.mask);
599 addr = be64_to_cpu(lowcore->external_new_psw.addr);
601 cpu_unmap_lowcore(lowcore);
604 if (env->ext_index == -1) {
605 env->pending_int &= ~INTERRUPT_EXT;
608 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
609 env->psw.mask, env->psw.addr);
611 load_psw(env, mask, addr);
614 static void do_io_interrupt(CPUS390XState *env)
622 if (!(env->psw.mask & PSW_MASK_IO)) {
623 cpu_abort(env, "I/O int w/o I/O mask\n");
626 for (isc = 0; isc < ARRAY_SIZE(env->io_index); isc++) {
629 if (env->io_index[isc] < 0) {
632 if (env->io_index[isc] > MAX_IO_QUEUE) {
633 cpu_abort(env, "I/O queue overrun for isc %d: %d\n",
634 isc, env->io_index[isc]);
637 q = &env->io_queue[env->io_index[isc]][isc];
638 isc_bits = ISC_TO_ISC_BITS(IO_INT_WORD_ISC(q->word));
639 if (!(env->cregs[6] & isc_bits)) {
647 lowcore = cpu_map_lowcore(env);
649 lowcore->subchannel_id = cpu_to_be16(q->id);
650 lowcore->subchannel_nr = cpu_to_be16(q->nr);
651 lowcore->io_int_parm = cpu_to_be32(q->parm);
652 lowcore->io_int_word = cpu_to_be32(q->word);
653 lowcore->io_old_psw.mask = cpu_to_be64(get_psw_mask(env));
654 lowcore->io_old_psw.addr = cpu_to_be64(env->psw.addr);
655 mask = be64_to_cpu(lowcore->io_new_psw.mask);
656 addr = be64_to_cpu(lowcore->io_new_psw.addr);
658 cpu_unmap_lowcore(lowcore);
660 env->io_index[isc]--;
662 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
663 env->psw.mask, env->psw.addr);
664 load_psw(env, mask, addr);
666 if (env->io_index[isc] >= 0) {
673 env->pending_int &= ~INTERRUPT_IO;
678 static void do_mchk_interrupt(CPUS390XState *env)
685 if (!(env->psw.mask & PSW_MASK_MCHECK)) {
686 cpu_abort(env, "Machine check w/o mchk mask\n");
689 if (env->mchk_index < 0 || env->mchk_index > MAX_MCHK_QUEUE) {
690 cpu_abort(env, "Mchk queue overrun: %d\n", env->mchk_index);
693 q = &env->mchk_queue[env->mchk_index];
696 /* Don't know how to handle this... */
697 cpu_abort(env, "Unknown machine check type %d\n", q->type);
699 if (!(env->cregs[14] & (1 << 28))) {
700 /* CRW machine checks disabled */
704 lowcore = cpu_map_lowcore(env);
706 for (i = 0; i < 16; i++) {
707 lowcore->floating_pt_save_area[i] = cpu_to_be64(env->fregs[i].ll);
708 lowcore->gpregs_save_area[i] = cpu_to_be64(env->regs[i]);
709 lowcore->access_regs_save_area[i] = cpu_to_be32(env->aregs[i]);
710 lowcore->cregs_save_area[i] = cpu_to_be64(env->cregs[i]);
712 lowcore->prefixreg_save_area = cpu_to_be32(env->psa);
713 lowcore->fpt_creg_save_area = cpu_to_be32(env->fpc);
714 lowcore->tod_progreg_save_area = cpu_to_be32(env->todpr);
715 lowcore->cpu_timer_save_area[0] = cpu_to_be32(env->cputm >> 32);
716 lowcore->cpu_timer_save_area[1] = cpu_to_be32((uint32_t)env->cputm);
717 lowcore->clock_comp_save_area[0] = cpu_to_be32(env->ckc >> 32);
718 lowcore->clock_comp_save_area[1] = cpu_to_be32((uint32_t)env->ckc);
720 lowcore->mcck_interruption_code[0] = cpu_to_be32(0x00400f1d);
721 lowcore->mcck_interruption_code[1] = cpu_to_be32(0x40330000);
722 lowcore->mcck_old_psw.mask = cpu_to_be64(get_psw_mask(env));
723 lowcore->mcck_old_psw.addr = cpu_to_be64(env->psw.addr);
724 mask = be64_to_cpu(lowcore->mcck_new_psw.mask);
725 addr = be64_to_cpu(lowcore->mcck_new_psw.addr);
727 cpu_unmap_lowcore(lowcore);
730 if (env->mchk_index == -1) {
731 env->pending_int &= ~INTERRUPT_MCHK;
734 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
735 env->psw.mask, env->psw.addr);
737 load_psw(env, mask, addr);
740 void do_interrupt(CPUS390XState *env)
742 S390CPU *cpu = s390_env_get_cpu(env);
745 qemu_log_mask(CPU_LOG_INT, "%s: %d at pc=%" PRIx64 "\n",
746 __func__, env->exception_index, env->psw.addr);
748 s390_add_running_cpu(cpu);
749 /* handle machine checks */
750 if ((env->psw.mask & PSW_MASK_MCHECK) &&
751 (env->exception_index == -1)) {
752 if (env->pending_int & INTERRUPT_MCHK) {
753 env->exception_index = EXCP_MCHK;
756 /* handle external interrupts */
757 if ((env->psw.mask & PSW_MASK_EXT) &&
758 env->exception_index == -1) {
759 if (env->pending_int & INTERRUPT_EXT) {
760 /* code is already in env */
761 env->exception_index = EXCP_EXT;
762 } else if (env->pending_int & INTERRUPT_TOD) {
763 cpu_inject_ext(cpu, 0x1004, 0, 0);
764 env->exception_index = EXCP_EXT;
765 env->pending_int &= ~INTERRUPT_EXT;
766 env->pending_int &= ~INTERRUPT_TOD;
767 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
768 cpu_inject_ext(cpu, 0x1005, 0, 0);
769 env->exception_index = EXCP_EXT;
770 env->pending_int &= ~INTERRUPT_EXT;
771 env->pending_int &= ~INTERRUPT_TOD;
774 /* handle I/O interrupts */
775 if ((env->psw.mask & PSW_MASK_IO) &&
776 (env->exception_index == -1)) {
777 if (env->pending_int & INTERRUPT_IO) {
778 env->exception_index = EXCP_IO;
782 switch (env->exception_index) {
784 do_program_interrupt(env);
787 do_svc_interrupt(env);
790 do_ext_interrupt(env);
793 do_io_interrupt(env);
796 do_mchk_interrupt(env);
799 env->exception_index = -1;
801 if (!env->pending_int) {
802 cs = CPU(s390_env_get_cpu(env));
803 cs->interrupt_request &= ~CPU_INTERRUPT_HARD;
807 #endif /* CONFIG_USER_ONLY */