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)
79 cpu = S390_CPU(object_new(TYPE_S390_CPU));
82 if (tcg_enabled() && !inited) {
84 s390x_translate_init();
87 env->cpu_model_str = cpu_model;
92 #if defined(CONFIG_USER_ONLY)
94 void do_interrupt(CPUS390XState *env)
96 env->exception_index = -1;
99 int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong address,
102 env->exception_index = EXCP_PGM;
103 env->int_pgm_code = PGM_ADDRESSING;
104 /* On real machines this value is dropped into LowMem. Since this
105 is userland, simply put this someplace that cpu_loop can find it. */
106 env->__excp_addr = address;
110 #else /* !CONFIG_USER_ONLY */
112 /* Ensure to exit the TB after this call! */
113 static void trigger_pgm_exception(CPUS390XState *env, uint32_t code,
116 env->exception_index = EXCP_PGM;
117 env->int_pgm_code = code;
118 env->int_pgm_ilen = ilen;
121 static int trans_bits(CPUS390XState *env, uint64_t mode)
126 case PSW_ASC_PRIMARY:
129 case PSW_ASC_SECONDARY:
136 cpu_abort(env, "unknown asc mode\n");
143 static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
146 int ilen = ILEN_LATER_INC;
147 int bits = trans_bits(env, mode) | 4;
149 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
151 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
152 trigger_pgm_exception(env, PGM_PROTECTION, ilen);
155 static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
156 uint32_t type, uint64_t asc, int rw)
158 int ilen = ILEN_LATER;
159 int bits = trans_bits(env, asc);
161 /* Code accesses have an undefined ilc. */
166 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
168 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
169 trigger_pgm_exception(env, type, ilen);
172 static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
173 uint64_t asc, uint64_t asce, int level,
174 target_ulong *raddr, int *flags, int rw)
180 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __func__, asce);
182 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
183 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
184 /* XXX different regions have different faults */
185 DPRINTF("%s: invalid region\n", __func__);
186 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
190 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
191 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
195 if (asce & _ASCE_REAL_SPACE) {
202 origin = asce & _ASCE_ORIGIN;
205 case _ASCE_TYPE_REGION1 + 4:
206 offs = (vaddr >> 50) & 0x3ff8;
208 case _ASCE_TYPE_REGION1:
209 offs = (vaddr >> 39) & 0x3ff8;
211 case _ASCE_TYPE_REGION2:
212 offs = (vaddr >> 28) & 0x3ff8;
214 case _ASCE_TYPE_REGION3:
215 offs = (vaddr >> 17) & 0x3ff8;
217 case _ASCE_TYPE_SEGMENT:
218 offs = (vaddr >> 9) & 0x07f8;
219 origin = asce & _SEGMENT_ENTRY_ORIGIN;
223 /* XXX region protection flags */
224 /* *flags &= ~PAGE_WRITE */
226 new_asce = ldq_phys(origin + offs);
227 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
228 __func__, origin, offs, new_asce);
230 if (level != _ASCE_TYPE_SEGMENT) {
231 /* yet another region */
232 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
237 if (new_asce & _PAGE_INVALID) {
238 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, new_asce);
239 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
243 if (new_asce & _PAGE_RO) {
244 *flags &= ~PAGE_WRITE;
247 *raddr = new_asce & _ASCE_ORIGIN;
249 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, new_asce);
254 static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
255 uint64_t asc, target_ulong *raddr, int *flags,
259 int level, new_level;
263 case PSW_ASC_PRIMARY:
264 PTE_DPRINTF("%s: asc=primary\n", __func__);
265 asce = env->cregs[1];
267 case PSW_ASC_SECONDARY:
268 PTE_DPRINTF("%s: asc=secondary\n", __func__);
269 asce = env->cregs[7];
272 PTE_DPRINTF("%s: asc=home\n", __func__);
273 asce = env->cregs[13];
277 switch (asce & _ASCE_TYPE_MASK) {
278 case _ASCE_TYPE_REGION1:
280 case _ASCE_TYPE_REGION2:
281 if (vaddr & 0xffe0000000000000ULL) {
282 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
283 " 0xffe0000000000000ULL\n", __func__, vaddr);
284 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
288 case _ASCE_TYPE_REGION3:
289 if (vaddr & 0xfffffc0000000000ULL) {
290 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
291 " 0xfffffc0000000000ULL\n", __func__, vaddr);
292 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
296 case _ASCE_TYPE_SEGMENT:
297 if (vaddr & 0xffffffff80000000ULL) {
298 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
299 " 0xffffffff80000000ULL\n", __func__, vaddr);
300 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
306 /* fake level above current */
307 level = asce & _ASCE_TYPE_MASK;
308 new_level = level + 4;
309 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
311 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
313 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
314 trigger_prot_fault(env, vaddr, asc);
321 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
322 target_ulong *raddr, int *flags)
327 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
328 vaddr &= TARGET_PAGE_MASK;
330 if (!(env->psw.mask & PSW_MASK_DAT)) {
337 case PSW_ASC_PRIMARY:
339 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
341 case PSW_ASC_SECONDARY:
343 * Instruction: Primary
347 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
349 *flags &= ~(PAGE_READ | PAGE_WRITE);
351 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
353 *flags &= ~(PAGE_EXEC);
358 hw_error("guest switched to unknown asc mode\n");
363 /* Convert real address -> absolute address */
364 if (*raddr < 0x2000) {
365 *raddr = *raddr + env->psa;
368 if (*raddr <= ram_size) {
369 sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
370 if (*flags & PAGE_READ) {
374 if (*flags & PAGE_WRITE) {
382 int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong orig_vaddr,
385 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
386 target_ulong vaddr, raddr;
389 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
390 __func__, _vaddr, rw, mmu_idx);
392 orig_vaddr &= TARGET_PAGE_MASK;
396 if (!(env->psw.mask & PSW_MASK_64)) {
400 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
401 /* Translation ended in exception */
405 /* check out of RAM access */
406 if (raddr > (ram_size + virtio_size)) {
407 DPRINTF("%s: raddr %" PRIx64 " > ram_size %" PRIx64 "\n", __func__,
408 (uint64_t)raddr, (uint64_t)ram_size);
409 trigger_pgm_exception(env, PGM_ADDRESSING, ILEN_LATER);
413 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __func__,
414 (uint64_t)vaddr, (uint64_t)raddr, prot);
416 tlb_set_page(env, orig_vaddr, raddr, prot,
417 mmu_idx, TARGET_PAGE_SIZE);
422 hwaddr cpu_get_phys_page_debug(CPUS390XState *env,
426 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
427 int old_exc = env->exception_index;
428 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
431 if (!(env->psw.mask & PSW_MASK_64)) {
435 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
436 env->exception_index = old_exc;
441 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
443 if (mask & PSW_MASK_WAIT) {
444 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
445 if (s390_del_running_cpu(env) == 0) {
446 #ifndef CONFIG_USER_ONLY
447 qemu_system_shutdown_request();
452 env->exception_index = EXCP_HLT;
455 env->psw.addr = addr;
456 env->psw.mask = mask;
457 env->cc_op = (mask >> 44) & 3;
460 static uint64_t get_psw_mask(CPUS390XState *env)
464 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
468 assert(!(env->cc_op & ~3));
469 r |= (uint64_t)env->cc_op << 44;
474 static LowCore *cpu_map_lowcore(CPUS390XState *env)
477 hwaddr len = sizeof(LowCore);
479 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
481 if (len < sizeof(LowCore)) {
482 cpu_abort(env, "Could not map lowcore\n");
488 static void cpu_unmap_lowcore(LowCore *lowcore)
490 cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore));
493 void *s390_cpu_physical_memory_map(CPUS390XState *env, hwaddr addr, hwaddr *len,
498 /* Mind the prefix area. */
500 /* Map the lowcore. */
502 *len = MIN(*len, 8192 - addr);
503 } else if ((addr >= env->psa) && (addr < env->psa + 8192)) {
504 /* Map the 0 page. */
506 *len = MIN(*len, 8192 - start);
509 return cpu_physical_memory_map(start, len, is_write);
512 void s390_cpu_physical_memory_unmap(CPUS390XState *env, void *addr, hwaddr len,
515 cpu_physical_memory_unmap(addr, len, is_write, len);
518 static void do_svc_interrupt(CPUS390XState *env)
523 lowcore = cpu_map_lowcore(env);
525 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
526 lowcore->svc_ilen = cpu_to_be16(env->int_svc_ilen);
527 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
528 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + env->int_svc_ilen);
529 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
530 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
532 cpu_unmap_lowcore(lowcore);
534 load_psw(env, mask, addr);
537 static void do_program_interrupt(CPUS390XState *env)
541 int ilen = env->int_pgm_ilen;
545 ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
548 ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
549 env->psw.addr += ilen;
552 assert(ilen == 2 || ilen == 4 || ilen == 6);
555 qemu_log_mask(CPU_LOG_INT, "%s: code=0x%x ilen=%d\n",
556 __func__, env->int_pgm_code, ilen);
558 lowcore = cpu_map_lowcore(env);
560 lowcore->pgm_ilen = cpu_to_be16(ilen);
561 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
562 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
563 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
564 mask = be64_to_cpu(lowcore->program_new_psw.mask);
565 addr = be64_to_cpu(lowcore->program_new_psw.addr);
567 cpu_unmap_lowcore(lowcore);
569 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __func__,
570 env->int_pgm_code, ilen, env->psw.mask,
573 load_psw(env, mask, addr);
576 #define VIRTIO_SUBCODE_64 0x0D00
578 static void do_ext_interrupt(CPUS390XState *env)
584 if (!(env->psw.mask & PSW_MASK_EXT)) {
585 cpu_abort(env, "Ext int w/o ext mask\n");
588 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
589 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
592 q = &env->ext_queue[env->ext_index];
593 lowcore = cpu_map_lowcore(env);
595 lowcore->ext_int_code = cpu_to_be16(q->code);
596 lowcore->ext_params = cpu_to_be32(q->param);
597 lowcore->ext_params2 = cpu_to_be64(q->param64);
598 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
599 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
600 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
601 mask = be64_to_cpu(lowcore->external_new_psw.mask);
602 addr = be64_to_cpu(lowcore->external_new_psw.addr);
604 cpu_unmap_lowcore(lowcore);
607 if (env->ext_index == -1) {
608 env->pending_int &= ~INTERRUPT_EXT;
611 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
612 env->psw.mask, env->psw.addr);
614 load_psw(env, mask, addr);
617 static void do_io_interrupt(CPUS390XState *env)
626 if (!(env->psw.mask & PSW_MASK_IO)) {
627 cpu_abort(env, "I/O int w/o I/O mask\n");
630 for (isc = 0; isc < ARRAY_SIZE(env->io_index); isc++) {
631 if (env->io_index[isc] < 0) {
634 if (env->io_index[isc] > MAX_IO_QUEUE) {
635 cpu_abort(env, "I/O queue overrun for isc %d: %d\n",
636 isc, env->io_index[isc]);
639 q = &env->io_queue[env->io_index[isc]][isc];
640 if (!(env->cregs[6] & q->word)) {
645 lowcore = cpu_map_lowcore(env);
647 lowcore->subchannel_id = cpu_to_be16(q->id);
648 lowcore->subchannel_nr = cpu_to_be16(q->nr);
649 lowcore->io_int_parm = cpu_to_be32(q->parm);
650 lowcore->io_int_word = cpu_to_be32(q->word);
651 lowcore->io_old_psw.mask = cpu_to_be64(get_psw_mask(env));
652 lowcore->io_old_psw.addr = cpu_to_be64(env->psw.addr);
653 mask = be64_to_cpu(lowcore->io_new_psw.mask);
654 addr = be64_to_cpu(lowcore->io_new_psw.addr);
656 cpu_unmap_lowcore(lowcore);
658 env->io_index[isc]--;
659 if (env->io_index >= 0) {
666 env->pending_int &= ~INTERRUPT_IO;
670 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
671 env->psw.mask, env->psw.addr);
672 load_psw(env, mask, addr);
676 static void do_mchk_interrupt(CPUS390XState *env)
683 if (!(env->psw.mask & PSW_MASK_MCHECK)) {
684 cpu_abort(env, "Machine check w/o mchk mask\n");
687 if (env->mchk_index < 0 || env->mchk_index > MAX_MCHK_QUEUE) {
688 cpu_abort(env, "Mchk queue overrun: %d\n", env->mchk_index);
691 q = &env->mchk_queue[env->mchk_index];
694 /* Don't know how to handle this... */
695 cpu_abort(env, "Unknown machine check type %d\n", q->type);
697 if (!(env->cregs[14] & (1 << 28))) {
698 /* CRW machine checks disabled */
702 lowcore = cpu_map_lowcore(env);
704 for (i = 0; i < 16; i++) {
705 lowcore->floating_pt_save_area[i] = cpu_to_be64(env->fregs[i].ll);
706 lowcore->gpregs_save_area[i] = cpu_to_be64(env->regs[i]);
707 lowcore->access_regs_save_area[i] = cpu_to_be32(env->aregs[i]);
708 lowcore->cregs_save_area[i] = cpu_to_be64(env->cregs[i]);
710 lowcore->prefixreg_save_area = cpu_to_be32(env->psa);
711 lowcore->fpt_creg_save_area = cpu_to_be32(env->fpc);
712 lowcore->tod_progreg_save_area = cpu_to_be32(env->todpr);
713 lowcore->cpu_timer_save_area[0] = cpu_to_be32(env->cputm >> 32);
714 lowcore->cpu_timer_save_area[1] = cpu_to_be32((uint32_t)env->cputm);
715 lowcore->clock_comp_save_area[0] = cpu_to_be32(env->ckc >> 32);
716 lowcore->clock_comp_save_area[1] = cpu_to_be32((uint32_t)env->ckc);
718 lowcore->mcck_interruption_code[0] = cpu_to_be32(0x00400f1d);
719 lowcore->mcck_interruption_code[1] = cpu_to_be32(0x40330000);
720 lowcore->mcck_old_psw.mask = cpu_to_be64(get_psw_mask(env));
721 lowcore->mcck_old_psw.addr = cpu_to_be64(env->psw.addr);
722 mask = be64_to_cpu(lowcore->mcck_new_psw.mask);
723 addr = be64_to_cpu(lowcore->mcck_new_psw.addr);
725 cpu_unmap_lowcore(lowcore);
728 if (env->mchk_index == -1) {
729 env->pending_int &= ~INTERRUPT_MCHK;
732 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
733 env->psw.mask, env->psw.addr);
735 load_psw(env, mask, addr);
738 void do_interrupt(CPUS390XState *env)
740 qemu_log_mask(CPU_LOG_INT, "%s: %d at pc=%" PRIx64 "\n",
741 __func__, env->exception_index, env->psw.addr);
743 s390_add_running_cpu(env);
744 /* handle machine checks */
745 if ((env->psw.mask & PSW_MASK_MCHECK) &&
746 (env->exception_index == -1)) {
747 if (env->pending_int & INTERRUPT_MCHK) {
748 env->exception_index = EXCP_MCHK;
751 /* handle external interrupts */
752 if ((env->psw.mask & PSW_MASK_EXT) &&
753 env->exception_index == -1) {
754 if (env->pending_int & INTERRUPT_EXT) {
755 /* code is already in env */
756 env->exception_index = EXCP_EXT;
757 } else if (env->pending_int & INTERRUPT_TOD) {
758 cpu_inject_ext(env, 0x1004, 0, 0);
759 env->exception_index = EXCP_EXT;
760 env->pending_int &= ~INTERRUPT_EXT;
761 env->pending_int &= ~INTERRUPT_TOD;
762 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
763 cpu_inject_ext(env, 0x1005, 0, 0);
764 env->exception_index = EXCP_EXT;
765 env->pending_int &= ~INTERRUPT_EXT;
766 env->pending_int &= ~INTERRUPT_TOD;
769 /* handle I/O interrupts */
770 if ((env->psw.mask & PSW_MASK_IO) &&
771 (env->exception_index == -1)) {
772 if (env->pending_int & INTERRUPT_IO) {
773 env->exception_index = EXCP_IO;
777 switch (env->exception_index) {
779 do_program_interrupt(env);
782 do_svc_interrupt(env);
785 do_ext_interrupt(env);
788 do_io_interrupt(env);
791 do_mchk_interrupt(env);
794 env->exception_index = -1;
796 if (!env->pending_int) {
797 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
801 #endif /* CONFIG_USER_ONLY */