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/>.
23 #include "qemu-timer.h"
24 #ifndef CONFIG_USER_ONLY
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 CPUS390XState *cpu_s390x_init(const char *cpu_model)
77 static int inited = 0;
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, int rw,
102 /* fprintf(stderr,"%s: address 0x%lx rw %d mmu_idx %d\n",
103 __FUNCTION__, address, rw, mmu_idx); */
104 env->exception_index = EXCP_ADDR;
105 env->__excp_addr = address; /* FIXME: find out how this works on a real machine */
109 #endif /* CONFIG_USER_ONLY */
111 void cpu_state_reset(CPUS390XState *env)
113 cpu_reset(ENV_GET_CPU(env));
116 #ifndef CONFIG_USER_ONLY
118 /* Ensure to exit the TB after this call! */
119 static void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilc)
121 env->exception_index = EXCP_PGM;
122 env->int_pgm_code = code;
123 env->int_pgm_ilc = ilc;
126 static int trans_bits(CPUS390XState *env, uint64_t mode)
131 case PSW_ASC_PRIMARY:
134 case PSW_ASC_SECONDARY:
141 cpu_abort(env, "unknown asc mode\n");
148 static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr, uint64_t mode)
150 int ilc = ILC_LATER_INC_2;
151 int bits = trans_bits(env, mode) | 4;
153 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
155 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
156 trigger_pgm_exception(env, PGM_PROTECTION, ilc);
159 static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr, uint32_t type,
160 uint64_t asc, int rw)
163 int bits = trans_bits(env, asc);
166 /* code has is undefined ilc */
170 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
172 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
173 trigger_pgm_exception(env, type, ilc);
176 static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
177 uint64_t asce, int level, target_ulong *raddr,
184 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __FUNCTION__, asce);
186 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
187 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
188 /* XXX different regions have different faults */
189 DPRINTF("%s: invalid region\n", __FUNCTION__);
190 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
194 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
195 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
199 if (asce & _ASCE_REAL_SPACE) {
206 origin = asce & _ASCE_ORIGIN;
209 case _ASCE_TYPE_REGION1 + 4:
210 offs = (vaddr >> 50) & 0x3ff8;
212 case _ASCE_TYPE_REGION1:
213 offs = (vaddr >> 39) & 0x3ff8;
215 case _ASCE_TYPE_REGION2:
216 offs = (vaddr >> 28) & 0x3ff8;
218 case _ASCE_TYPE_REGION3:
219 offs = (vaddr >> 17) & 0x3ff8;
221 case _ASCE_TYPE_SEGMENT:
222 offs = (vaddr >> 9) & 0x07f8;
223 origin = asce & _SEGMENT_ENTRY_ORIGIN;
227 /* XXX region protection flags */
228 /* *flags &= ~PAGE_WRITE */
230 new_asce = ldq_phys(origin + offs);
231 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
232 __FUNCTION__, origin, offs, new_asce);
234 if (level != _ASCE_TYPE_SEGMENT) {
235 /* yet another region */
236 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
241 if (new_asce & _PAGE_INVALID) {
242 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __FUNCTION__, new_asce);
243 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
247 if (new_asce & _PAGE_RO) {
248 *flags &= ~PAGE_WRITE;
251 *raddr = new_asce & _ASCE_ORIGIN;
253 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __FUNCTION__, new_asce);
258 static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
259 target_ulong *raddr, int *flags, int rw)
262 int level, new_level;
266 case PSW_ASC_PRIMARY:
267 PTE_DPRINTF("%s: asc=primary\n", __FUNCTION__);
268 asce = env->cregs[1];
270 case PSW_ASC_SECONDARY:
271 PTE_DPRINTF("%s: asc=secondary\n", __FUNCTION__);
272 asce = env->cregs[7];
275 PTE_DPRINTF("%s: asc=home\n", __FUNCTION__);
276 asce = env->cregs[13];
280 switch (asce & _ASCE_TYPE_MASK) {
281 case _ASCE_TYPE_REGION1:
283 case _ASCE_TYPE_REGION2:
284 if (vaddr & 0xffe0000000000000ULL) {
285 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
286 " 0xffe0000000000000ULL\n", __FUNCTION__,
288 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
292 case _ASCE_TYPE_REGION3:
293 if (vaddr & 0xfffffc0000000000ULL) {
294 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
295 " 0xfffffc0000000000ULL\n", __FUNCTION__,
297 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
301 case _ASCE_TYPE_SEGMENT:
302 if (vaddr & 0xffffffff80000000ULL) {
303 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
304 " 0xffffffff80000000ULL\n", __FUNCTION__,
306 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
312 /* fake level above current */
313 level = asce & _ASCE_TYPE_MASK;
314 new_level = level + 4;
315 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
317 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
319 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
320 trigger_prot_fault(env, vaddr, asc);
327 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
328 target_ulong *raddr, int *flags)
333 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
334 vaddr &= TARGET_PAGE_MASK;
336 if (!(env->psw.mask & PSW_MASK_DAT)) {
343 case PSW_ASC_PRIMARY:
345 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
347 case PSW_ASC_SECONDARY:
349 * Instruction: Primary
353 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
355 *flags &= ~(PAGE_READ | PAGE_WRITE);
357 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
359 *flags &= ~(PAGE_EXEC);
364 hw_error("guest switched to unknown asc mode\n");
369 /* Convert real address -> absolute address */
370 if (*raddr < 0x2000) {
371 *raddr = *raddr + env->psa;
374 if (*raddr <= ram_size) {
375 sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
376 if (*flags & PAGE_READ) {
380 if (*flags & PAGE_WRITE) {
388 int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong _vaddr, int rw,
391 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
392 target_ulong vaddr, raddr;
395 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
396 __FUNCTION__, _vaddr, rw, mmu_idx);
398 _vaddr &= TARGET_PAGE_MASK;
402 if (!(env->psw.mask & PSW_MASK_64)) {
406 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
407 /* Translation ended in exception */
411 /* check out of RAM access */
412 if (raddr > (ram_size + virtio_size)) {
413 DPRINTF("%s: aaddr %" PRIx64 " > ram_size %" PRIx64 "\n", __FUNCTION__,
414 (uint64_t)aaddr, (uint64_t)ram_size);
415 trigger_pgm_exception(env, PGM_ADDRESSING, ILC_LATER);
419 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __FUNCTION__,
420 (uint64_t)vaddr, (uint64_t)raddr, prot);
422 tlb_set_page(env, _vaddr, raddr, prot,
423 mmu_idx, TARGET_PAGE_SIZE);
428 target_phys_addr_t cpu_get_phys_page_debug(CPUS390XState *env, target_ulong vaddr)
431 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
432 int old_exc = env->exception_index;
433 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
436 if (!(env->psw.mask & PSW_MASK_64)) {
440 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
441 env->exception_index = old_exc;
446 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
448 if (mask & PSW_MASK_WAIT) {
449 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
450 if (s390_del_running_cpu(env) == 0) {
451 #ifndef CONFIG_USER_ONLY
452 qemu_system_shutdown_request();
457 env->exception_index = EXCP_HLT;
460 env->psw.addr = addr;
461 env->psw.mask = mask;
462 env->cc_op = (mask >> 13) & 3;
465 static uint64_t get_psw_mask(CPUS390XState *env)
467 uint64_t r = env->psw.mask;
469 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
472 assert(!(env->cc_op & ~3));
473 r |= env->cc_op << 13;
478 static void do_svc_interrupt(CPUS390XState *env)
482 target_phys_addr_t len = TARGET_PAGE_SIZE;
484 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
486 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
487 lowcore->svc_ilc = cpu_to_be16(env->int_svc_ilc);
488 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
489 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + (env->int_svc_ilc));
490 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
491 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
493 cpu_physical_memory_unmap(lowcore, len, 1, len);
495 load_psw(env, mask, addr);
498 static void do_program_interrupt(CPUS390XState *env)
502 target_phys_addr_t len = TARGET_PAGE_SIZE;
503 int ilc = env->int_pgm_ilc;
507 ilc = get_ilc(ldub_code(env->psw.addr));
510 ilc = get_ilc(ldub_code(env->psw.addr));
511 env->psw.addr += ilc * 2;
513 case ILC_LATER_INC_2:
514 ilc = get_ilc(ldub_code(env->psw.addr)) * 2;
515 env->psw.addr += ilc;
519 qemu_log("%s: code=0x%x ilc=%d\n", __FUNCTION__, env->int_pgm_code, ilc);
521 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
523 lowcore->pgm_ilc = cpu_to_be16(ilc);
524 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
525 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
526 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
527 mask = be64_to_cpu(lowcore->program_new_psw.mask);
528 addr = be64_to_cpu(lowcore->program_new_psw.addr);
530 cpu_physical_memory_unmap(lowcore, len, 1, len);
532 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
533 env->int_pgm_code, ilc, env->psw.mask,
536 load_psw(env, mask, addr);
539 #define VIRTIO_SUBCODE_64 0x0D00
541 static void do_ext_interrupt(CPUS390XState *env)
545 target_phys_addr_t len = TARGET_PAGE_SIZE;
548 if (!(env->psw.mask & PSW_MASK_EXT)) {
549 cpu_abort(env, "Ext int w/o ext mask\n");
552 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
553 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
556 q = &env->ext_queue[env->ext_index];
557 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
559 lowcore->ext_int_code = cpu_to_be16(q->code);
560 lowcore->ext_params = cpu_to_be32(q->param);
561 lowcore->ext_params2 = cpu_to_be64(q->param64);
562 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
563 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
564 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
565 mask = be64_to_cpu(lowcore->external_new_psw.mask);
566 addr = be64_to_cpu(lowcore->external_new_psw.addr);
568 cpu_physical_memory_unmap(lowcore, len, 1, len);
571 if (env->ext_index == -1) {
572 env->pending_int &= ~INTERRUPT_EXT;
575 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
576 env->psw.mask, env->psw.addr);
578 load_psw(env, mask, addr);
581 void do_interrupt (CPUS390XState *env)
583 qemu_log("%s: %d at pc=%" PRIx64 "\n", __FUNCTION__, env->exception_index,
586 s390_add_running_cpu(env);
587 /* handle external interrupts */
588 if ((env->psw.mask & PSW_MASK_EXT) &&
589 env->exception_index == -1) {
590 if (env->pending_int & INTERRUPT_EXT) {
591 /* code is already in env */
592 env->exception_index = EXCP_EXT;
593 } else if (env->pending_int & INTERRUPT_TOD) {
594 cpu_inject_ext(env, 0x1004, 0, 0);
595 env->exception_index = EXCP_EXT;
596 env->pending_int &= ~INTERRUPT_EXT;
597 env->pending_int &= ~INTERRUPT_TOD;
598 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
599 cpu_inject_ext(env, 0x1005, 0, 0);
600 env->exception_index = EXCP_EXT;
601 env->pending_int &= ~INTERRUPT_EXT;
602 env->pending_int &= ~INTERRUPT_TOD;
606 switch (env->exception_index) {
608 do_program_interrupt(env);
611 do_svc_interrupt(env);
614 do_ext_interrupt(env);
617 env->exception_index = -1;
619 if (!env->pending_int) {
620 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
624 #endif /* CONFIG_USER_ONLY */