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/>.
28 #include "qemu-common.h"
29 #include "qemu-timer.h"
32 //#define DEBUG_S390_PTE
33 //#define DEBUG_S390_STDOUT
36 #ifdef DEBUG_S390_STDOUT
37 #define DPRINTF(fmt, ...) \
38 do { fprintf(stderr, fmt, ## __VA_ARGS__); \
39 qemu_log(fmt, ##__VA_ARGS__); } while (0)
41 #define DPRINTF(fmt, ...) \
42 do { qemu_log(fmt, ## __VA_ARGS__); } while (0)
45 #define DPRINTF(fmt, ...) \
50 #define PTE_DPRINTF DPRINTF
52 #define PTE_DPRINTF(fmt, ...) \
56 #ifndef CONFIG_USER_ONLY
57 static void s390x_tod_timer(void *opaque)
59 CPUState *env = opaque;
61 env->pending_int |= INTERRUPT_TOD;
62 cpu_interrupt(env, CPU_INTERRUPT_HARD);
65 static void s390x_cpu_timer(void *opaque)
67 CPUState *env = opaque;
69 env->pending_int |= INTERRUPT_CPUTIMER;
70 cpu_interrupt(env, CPU_INTERRUPT_HARD);
74 CPUS390XState *cpu_s390x_init(const char *cpu_model)
77 #if !defined (CONFIG_USER_ONLY)
80 static int inited = 0;
81 static int cpu_num = 0;
83 env = qemu_mallocz(sizeof(CPUS390XState));
87 s390x_translate_init();
90 #if !defined(CONFIG_USER_ONLY)
91 qemu_get_timedate(&tm, 0);
92 env->tod_offset = TOD_UNIX_EPOCH +
93 (time2tod(mktimegm(&tm)) * 1000000000ULL);
94 env->tod_basetime = 0;
95 env->tod_timer = qemu_new_timer_ns(vm_clock, s390x_tod_timer, env);
96 env->cpu_timer = qemu_new_timer_ns(vm_clock, s390x_cpu_timer, env);
98 env->cpu_model_str = cpu_model;
99 env->cpu_num = cpu_num++;
106 #if defined(CONFIG_USER_ONLY)
108 void do_interrupt (CPUState *env)
110 env->exception_index = -1;
113 int cpu_s390x_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
114 int mmu_idx, int is_softmmu)
116 /* fprintf(stderr,"%s: address 0x%lx rw %d mmu_idx %d is_softmmu %d\n",
117 __FUNCTION__, address, rw, mmu_idx, is_softmmu); */
118 env->exception_index = EXCP_ADDR;
119 env->__excp_addr = address; /* FIXME: find out how this works on a real machine */
123 #endif /* CONFIG_USER_ONLY */
125 void cpu_reset(CPUS390XState *env)
127 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
128 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
129 log_cpu_state(env, 0);
132 memset(env, 0, offsetof(CPUS390XState, breakpoints));
133 /* FIXME: reset vector? */
137 #ifndef CONFIG_USER_ONLY
139 /* Ensure to exit the TB after this call! */
140 static void trigger_pgm_exception(CPUState *env, uint32_t code, uint32_t ilc)
142 env->exception_index = EXCP_PGM;
143 env->int_pgm_code = code;
144 env->int_pgm_ilc = ilc;
147 static int trans_bits(CPUState *env, uint64_t mode)
152 case PSW_ASC_PRIMARY:
155 case PSW_ASC_SECONDARY:
162 cpu_abort(env, "unknown asc mode\n");
169 static void trigger_prot_fault(CPUState *env, target_ulong vaddr, uint64_t mode)
171 int ilc = ILC_LATER_INC_2;
172 int bits = trans_bits(env, mode) | 4;
174 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
176 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
177 trigger_pgm_exception(env, PGM_PROTECTION, ilc);
180 static void trigger_page_fault(CPUState *env, target_ulong vaddr, uint32_t type,
181 uint64_t asc, int rw)
184 int bits = trans_bits(env, asc);
187 /* code has is undefined ilc */
191 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
193 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
194 trigger_pgm_exception(env, type, ilc);
197 static int mmu_translate_asce(CPUState *env, target_ulong vaddr, uint64_t asc,
198 uint64_t asce, int level, target_ulong *raddr,
205 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __FUNCTION__, asce);
207 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
208 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
209 /* XXX different regions have different faults */
210 DPRINTF("%s: invalid region\n", __FUNCTION__);
211 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
215 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
216 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
220 if (asce & _ASCE_REAL_SPACE) {
227 origin = asce & _ASCE_ORIGIN;
230 case _ASCE_TYPE_REGION1 + 4:
231 offs = (vaddr >> 50) & 0x3ff8;
233 case _ASCE_TYPE_REGION1:
234 offs = (vaddr >> 39) & 0x3ff8;
236 case _ASCE_TYPE_REGION2:
237 offs = (vaddr >> 28) & 0x3ff8;
239 case _ASCE_TYPE_REGION3:
240 offs = (vaddr >> 17) & 0x3ff8;
242 case _ASCE_TYPE_SEGMENT:
243 offs = (vaddr >> 9) & 0x07f8;
244 origin = asce & _SEGMENT_ENTRY_ORIGIN;
248 /* XXX region protection flags */
249 /* *flags &= ~PAGE_WRITE */
251 new_asce = ldq_phys(origin + offs);
252 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
253 __FUNCTION__, origin, offs, new_asce);
255 if (level != _ASCE_TYPE_SEGMENT) {
256 /* yet another region */
257 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
262 if (new_asce & _PAGE_INVALID) {
263 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __FUNCTION__, new_asce);
264 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
268 if (new_asce & _PAGE_RO) {
269 *flags &= ~PAGE_WRITE;
272 *raddr = new_asce & _ASCE_ORIGIN;
274 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __FUNCTION__, new_asce);
279 static int mmu_translate_asc(CPUState *env, target_ulong vaddr, uint64_t asc,
280 target_ulong *raddr, int *flags, int rw)
283 int level, new_level;
287 case PSW_ASC_PRIMARY:
288 PTE_DPRINTF("%s: asc=primary\n", __FUNCTION__);
289 asce = env->cregs[1];
291 case PSW_ASC_SECONDARY:
292 PTE_DPRINTF("%s: asc=secondary\n", __FUNCTION__);
293 asce = env->cregs[7];
296 PTE_DPRINTF("%s: asc=home\n", __FUNCTION__);
297 asce = env->cregs[13];
301 switch (asce & _ASCE_TYPE_MASK) {
302 case _ASCE_TYPE_REGION1:
304 case _ASCE_TYPE_REGION2:
305 if (vaddr & 0xffe0000000000000ULL) {
306 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
307 " 0xffe0000000000000ULL\n", __FUNCTION__,
309 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
313 case _ASCE_TYPE_REGION3:
314 if (vaddr & 0xfffffc0000000000ULL) {
315 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
316 " 0xfffffc0000000000ULL\n", __FUNCTION__,
318 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
322 case _ASCE_TYPE_SEGMENT:
323 if (vaddr & 0xffffffff80000000ULL) {
324 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
325 " 0xffffffff80000000ULL\n", __FUNCTION__,
327 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
333 /* fake level above current */
334 level = asce & _ASCE_TYPE_MASK;
335 new_level = level + 4;
336 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
338 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
340 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
341 trigger_prot_fault(env, vaddr, asc);
348 int mmu_translate(CPUState *env, target_ulong vaddr, int rw, uint64_t asc,
349 target_ulong *raddr, int *flags)
353 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
354 vaddr &= TARGET_PAGE_MASK;
356 if (!(env->psw.mask & PSW_MASK_DAT)) {
363 case PSW_ASC_PRIMARY:
365 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
367 case PSW_ASC_SECONDARY:
369 * Instruction: Primary
373 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
375 *flags &= ~(PAGE_READ | PAGE_WRITE);
377 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
379 *flags &= ~(PAGE_EXEC);
384 hw_error("guest switched to unknown asc mode\n");
389 /* Convert real address -> absolute address */
390 if (*raddr < 0x2000) {
391 *raddr = *raddr + env->psa;
397 int cpu_s390x_handle_mmu_fault (CPUState *env, target_ulong _vaddr, int rw,
398 int mmu_idx, int is_softmmu)
400 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
401 target_ulong vaddr, raddr;
404 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d is_softmmu %d\n",
405 __FUNCTION__, _vaddr, rw, mmu_idx, is_softmmu);
407 _vaddr &= TARGET_PAGE_MASK;
411 if (!(env->psw.mask & PSW_MASK_64)) {
415 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
416 /* Translation ended in exception */
420 /* check out of RAM access */
421 if (raddr > (ram_size + virtio_size)) {
422 DPRINTF("%s: aaddr %" PRIx64 " > ram_size %" PRIx64 "\n", __FUNCTION__,
423 (uint64_t)aaddr, (uint64_t)ram_size);
424 trigger_pgm_exception(env, PGM_ADDRESSING, ILC_LATER);
428 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __FUNCTION__,
429 (uint64_t)vaddr, (uint64_t)raddr, prot);
431 tlb_set_page(env, _vaddr, raddr, prot,
432 mmu_idx, TARGET_PAGE_SIZE);
437 target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong vaddr)
440 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
441 int old_exc = env->exception_index;
442 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
445 if (!(env->psw.mask & PSW_MASK_64)) {
449 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
450 env->exception_index = old_exc;
455 void load_psw(CPUState *env, uint64_t mask, uint64_t addr)
457 if (mask & PSW_MASK_WAIT) {
459 env->exception_index = EXCP_HLT;
460 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
461 /* XXX disabled wait state - CPU is dead */
465 env->psw.addr = addr;
466 env->psw.mask = mask;
467 env->cc_op = (mask >> 13) & 3;
470 static uint64_t get_psw_mask(CPUState *env)
472 uint64_t r = env->psw.mask;
474 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
477 assert(!(env->cc_op & ~3));
478 r |= env->cc_op << 13;
483 static void do_svc_interrupt(CPUState *env)
487 target_phys_addr_t len = TARGET_PAGE_SIZE;
489 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
491 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
492 lowcore->svc_ilc = cpu_to_be16(env->int_svc_ilc);
493 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
494 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + (env->int_svc_ilc));
495 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
496 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
498 cpu_physical_memory_unmap(lowcore, len, 1, len);
500 load_psw(env, mask, addr);
503 static void do_program_interrupt(CPUState *env)
507 target_phys_addr_t len = TARGET_PAGE_SIZE;
508 int ilc = env->int_pgm_ilc;
512 ilc = get_ilc(ldub_code(env->psw.addr));
515 ilc = get_ilc(ldub_code(env->psw.addr));
516 env->psw.addr += ilc * 2;
518 case ILC_LATER_INC_2:
519 ilc = get_ilc(ldub_code(env->psw.addr)) * 2;
520 env->psw.addr += ilc;
524 qemu_log("%s: code=0x%x ilc=%d\n", __FUNCTION__, env->int_pgm_code, ilc);
526 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
528 lowcore->pgm_ilc = cpu_to_be16(ilc);
529 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
530 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
531 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
532 mask = be64_to_cpu(lowcore->program_new_psw.mask);
533 addr = be64_to_cpu(lowcore->program_new_psw.addr);
535 cpu_physical_memory_unmap(lowcore, len, 1, len);
537 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
538 env->int_pgm_code, ilc, env->psw.mask,
541 load_psw(env, mask, addr);
544 #define VIRTIO_SUBCODE_64 0x0D00
546 static void do_ext_interrupt(CPUState *env)
550 target_phys_addr_t len = TARGET_PAGE_SIZE;
553 if (!(env->psw.mask & PSW_MASK_EXT)) {
554 cpu_abort(env, "Ext int w/o ext mask\n");
557 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
558 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
561 q = &env->ext_queue[env->ext_index];
562 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
564 lowcore->ext_int_code = cpu_to_be16(q->code);
565 lowcore->ext_params = cpu_to_be32(q->param);
566 lowcore->ext_params2 = cpu_to_be64(q->param64);
567 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
568 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
569 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
570 mask = be64_to_cpu(lowcore->external_new_psw.mask);
571 addr = be64_to_cpu(lowcore->external_new_psw.addr);
573 cpu_physical_memory_unmap(lowcore, len, 1, len);
576 if (env->ext_index == -1) {
577 env->pending_int &= ~INTERRUPT_EXT;
580 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
581 env->psw.mask, env->psw.addr);
583 load_psw(env, mask, addr);
586 void do_interrupt (CPUState *env)
588 qemu_log("%s: %d at pc=%" PRIx64 "\n", __FUNCTION__, env->exception_index,
591 /* handle external interrupts */
592 if ((env->psw.mask & PSW_MASK_EXT) &&
593 env->exception_index == -1) {
594 if (env->pending_int & INTERRUPT_EXT) {
595 /* code is already in env */
596 env->exception_index = EXCP_EXT;
597 } else if (env->pending_int & INTERRUPT_TOD) {
598 cpu_inject_ext(env, 0x1004, 0, 0);
599 env->exception_index = EXCP_EXT;
600 env->pending_int &= ~INTERRUPT_EXT;
601 env->pending_int &= ~INTERRUPT_TOD;
602 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
603 cpu_inject_ext(env, 0x1005, 0, 0);
604 env->exception_index = EXCP_EXT;
605 env->pending_int &= ~INTERRUPT_EXT;
606 env->pending_int &= ~INTERRUPT_TOD;
610 switch (env->exception_index) {
612 do_program_interrupt(env);
615 do_svc_interrupt(env);
618 do_ext_interrupt(env);
621 env->exception_index = -1;
623 if (!env->pending_int) {
624 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
628 #endif /* CONFIG_USER_ONLY */