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 static void s390x_tod_timer(void *opaque)
56 CPUS390XState *env = opaque;
58 env->pending_int |= INTERRUPT_TOD;
59 cpu_interrupt(env, CPU_INTERRUPT_HARD);
62 static void s390x_cpu_timer(void *opaque)
64 CPUS390XState *env = opaque;
66 env->pending_int |= INTERRUPT_CPUTIMER;
67 cpu_interrupt(env, CPU_INTERRUPT_HARD);
71 CPUS390XState *cpu_s390x_init(const char *cpu_model)
74 #if !defined (CONFIG_USER_ONLY)
77 static int inited = 0;
78 static int cpu_num = 0;
80 env = g_malloc0(sizeof(CPUS390XState));
82 if (tcg_enabled() && !inited) {
84 s390x_translate_init();
87 #if !defined(CONFIG_USER_ONLY)
88 qemu_get_timedate(&tm, 0);
89 env->tod_offset = TOD_UNIX_EPOCH +
90 (time2tod(mktimegm(&tm)) * 1000000000ULL);
91 env->tod_basetime = 0;
92 env->tod_timer = qemu_new_timer_ns(vm_clock, s390x_tod_timer, env);
93 env->cpu_timer = qemu_new_timer_ns(vm_clock, s390x_cpu_timer, env);
95 env->cpu_model_str = cpu_model;
96 env->cpu_num = cpu_num++;
103 #if defined(CONFIG_USER_ONLY)
105 void do_interrupt (CPUS390XState *env)
107 env->exception_index = -1;
110 int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong address, int rw,
113 /* fprintf(stderr,"%s: address 0x%lx rw %d mmu_idx %d\n",
114 __FUNCTION__, address, rw, mmu_idx); */
115 env->exception_index = EXCP_ADDR;
116 env->__excp_addr = address; /* FIXME: find out how this works on a real machine */
120 #endif /* CONFIG_USER_ONLY */
122 void cpu_state_reset(CPUS390XState *env)
124 if (qemu_loglevel_mask(CPU_LOG_RESET)) {
125 qemu_log("CPU Reset (CPU %d)\n", env->cpu_index);
126 log_cpu_state(env, 0);
129 memset(env, 0, offsetof(CPUS390XState, breakpoints));
130 /* FIXME: reset vector? */
132 s390_add_running_cpu(env);
135 #ifndef CONFIG_USER_ONLY
137 /* Ensure to exit the TB after this call! */
138 static void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilc)
140 env->exception_index = EXCP_PGM;
141 env->int_pgm_code = code;
142 env->int_pgm_ilc = ilc;
145 static int trans_bits(CPUS390XState *env, uint64_t mode)
150 case PSW_ASC_PRIMARY:
153 case PSW_ASC_SECONDARY:
160 cpu_abort(env, "unknown asc mode\n");
167 static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr, uint64_t mode)
169 int ilc = ILC_LATER_INC_2;
170 int bits = trans_bits(env, mode) | 4;
172 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
174 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
175 trigger_pgm_exception(env, PGM_PROTECTION, ilc);
178 static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr, uint32_t type,
179 uint64_t asc, int rw)
182 int bits = trans_bits(env, asc);
185 /* code has is undefined ilc */
189 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
191 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
192 trigger_pgm_exception(env, type, ilc);
195 static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
196 uint64_t asce, int level, target_ulong *raddr,
203 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __FUNCTION__, asce);
205 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
206 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
207 /* XXX different regions have different faults */
208 DPRINTF("%s: invalid region\n", __FUNCTION__);
209 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
213 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
214 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
218 if (asce & _ASCE_REAL_SPACE) {
225 origin = asce & _ASCE_ORIGIN;
228 case _ASCE_TYPE_REGION1 + 4:
229 offs = (vaddr >> 50) & 0x3ff8;
231 case _ASCE_TYPE_REGION1:
232 offs = (vaddr >> 39) & 0x3ff8;
234 case _ASCE_TYPE_REGION2:
235 offs = (vaddr >> 28) & 0x3ff8;
237 case _ASCE_TYPE_REGION3:
238 offs = (vaddr >> 17) & 0x3ff8;
240 case _ASCE_TYPE_SEGMENT:
241 offs = (vaddr >> 9) & 0x07f8;
242 origin = asce & _SEGMENT_ENTRY_ORIGIN;
246 /* XXX region protection flags */
247 /* *flags &= ~PAGE_WRITE */
249 new_asce = ldq_phys(origin + offs);
250 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
251 __FUNCTION__, origin, offs, new_asce);
253 if (level != _ASCE_TYPE_SEGMENT) {
254 /* yet another region */
255 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
260 if (new_asce & _PAGE_INVALID) {
261 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __FUNCTION__, new_asce);
262 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
266 if (new_asce & _PAGE_RO) {
267 *flags &= ~PAGE_WRITE;
270 *raddr = new_asce & _ASCE_ORIGIN;
272 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __FUNCTION__, new_asce);
277 static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
278 target_ulong *raddr, int *flags, int rw)
281 int level, new_level;
285 case PSW_ASC_PRIMARY:
286 PTE_DPRINTF("%s: asc=primary\n", __FUNCTION__);
287 asce = env->cregs[1];
289 case PSW_ASC_SECONDARY:
290 PTE_DPRINTF("%s: asc=secondary\n", __FUNCTION__);
291 asce = env->cregs[7];
294 PTE_DPRINTF("%s: asc=home\n", __FUNCTION__);
295 asce = env->cregs[13];
299 switch (asce & _ASCE_TYPE_MASK) {
300 case _ASCE_TYPE_REGION1:
302 case _ASCE_TYPE_REGION2:
303 if (vaddr & 0xffe0000000000000ULL) {
304 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
305 " 0xffe0000000000000ULL\n", __FUNCTION__,
307 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
311 case _ASCE_TYPE_REGION3:
312 if (vaddr & 0xfffffc0000000000ULL) {
313 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
314 " 0xfffffc0000000000ULL\n", __FUNCTION__,
316 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
320 case _ASCE_TYPE_SEGMENT:
321 if (vaddr & 0xffffffff80000000ULL) {
322 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
323 " 0xffffffff80000000ULL\n", __FUNCTION__,
325 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
331 /* fake level above current */
332 level = asce & _ASCE_TYPE_MASK;
333 new_level = level + 4;
334 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
336 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
338 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
339 trigger_prot_fault(env, vaddr, asc);
346 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
347 target_ulong *raddr, int *flags)
352 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
353 vaddr &= TARGET_PAGE_MASK;
355 if (!(env->psw.mask & PSW_MASK_DAT)) {
362 case PSW_ASC_PRIMARY:
364 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
366 case PSW_ASC_SECONDARY:
368 * Instruction: Primary
372 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
374 *flags &= ~(PAGE_READ | PAGE_WRITE);
376 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
378 *flags &= ~(PAGE_EXEC);
383 hw_error("guest switched to unknown asc mode\n");
388 /* Convert real address -> absolute address */
389 if (*raddr < 0x2000) {
390 *raddr = *raddr + env->psa;
393 if (*raddr <= ram_size) {
394 sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
395 if (*flags & PAGE_READ) {
399 if (*flags & PAGE_WRITE) {
407 int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong _vaddr, int rw,
410 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
411 target_ulong vaddr, raddr;
414 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
415 __FUNCTION__, _vaddr, rw, mmu_idx);
417 _vaddr &= TARGET_PAGE_MASK;
421 if (!(env->psw.mask & PSW_MASK_64)) {
425 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
426 /* Translation ended in exception */
430 /* check out of RAM access */
431 if (raddr > (ram_size + virtio_size)) {
432 DPRINTF("%s: aaddr %" PRIx64 " > ram_size %" PRIx64 "\n", __FUNCTION__,
433 (uint64_t)aaddr, (uint64_t)ram_size);
434 trigger_pgm_exception(env, PGM_ADDRESSING, ILC_LATER);
438 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __FUNCTION__,
439 (uint64_t)vaddr, (uint64_t)raddr, prot);
441 tlb_set_page(env, _vaddr, raddr, prot,
442 mmu_idx, TARGET_PAGE_SIZE);
447 target_phys_addr_t cpu_get_phys_page_debug(CPUS390XState *env, target_ulong vaddr)
450 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
451 int old_exc = env->exception_index;
452 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
455 if (!(env->psw.mask & PSW_MASK_64)) {
459 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
460 env->exception_index = old_exc;
465 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
467 if (mask & PSW_MASK_WAIT) {
468 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
469 if (s390_del_running_cpu(env) == 0) {
470 #ifndef CONFIG_USER_ONLY
471 qemu_system_shutdown_request();
476 env->exception_index = EXCP_HLT;
479 env->psw.addr = addr;
480 env->psw.mask = mask;
481 env->cc_op = (mask >> 13) & 3;
484 static uint64_t get_psw_mask(CPUS390XState *env)
486 uint64_t r = env->psw.mask;
488 env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
491 assert(!(env->cc_op & ~3));
492 r |= env->cc_op << 13;
497 static void do_svc_interrupt(CPUS390XState *env)
501 target_phys_addr_t len = TARGET_PAGE_SIZE;
503 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
505 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
506 lowcore->svc_ilc = cpu_to_be16(env->int_svc_ilc);
507 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
508 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + (env->int_svc_ilc));
509 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
510 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
512 cpu_physical_memory_unmap(lowcore, len, 1, len);
514 load_psw(env, mask, addr);
517 static void do_program_interrupt(CPUS390XState *env)
521 target_phys_addr_t len = TARGET_PAGE_SIZE;
522 int ilc = env->int_pgm_ilc;
526 ilc = get_ilc(ldub_code(env->psw.addr));
529 ilc = get_ilc(ldub_code(env->psw.addr));
530 env->psw.addr += ilc * 2;
532 case ILC_LATER_INC_2:
533 ilc = get_ilc(ldub_code(env->psw.addr)) * 2;
534 env->psw.addr += ilc;
538 qemu_log("%s: code=0x%x ilc=%d\n", __FUNCTION__, env->int_pgm_code, ilc);
540 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
542 lowcore->pgm_ilc = cpu_to_be16(ilc);
543 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
544 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
545 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
546 mask = be64_to_cpu(lowcore->program_new_psw.mask);
547 addr = be64_to_cpu(lowcore->program_new_psw.addr);
549 cpu_physical_memory_unmap(lowcore, len, 1, len);
551 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
552 env->int_pgm_code, ilc, env->psw.mask,
555 load_psw(env, mask, addr);
558 #define VIRTIO_SUBCODE_64 0x0D00
560 static void do_ext_interrupt(CPUS390XState *env)
564 target_phys_addr_t len = TARGET_PAGE_SIZE;
567 if (!(env->psw.mask & PSW_MASK_EXT)) {
568 cpu_abort(env, "Ext int w/o ext mask\n");
571 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
572 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
575 q = &env->ext_queue[env->ext_index];
576 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
578 lowcore->ext_int_code = cpu_to_be16(q->code);
579 lowcore->ext_params = cpu_to_be32(q->param);
580 lowcore->ext_params2 = cpu_to_be64(q->param64);
581 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
582 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
583 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
584 mask = be64_to_cpu(lowcore->external_new_psw.mask);
585 addr = be64_to_cpu(lowcore->external_new_psw.addr);
587 cpu_physical_memory_unmap(lowcore, len, 1, len);
590 if (env->ext_index == -1) {
591 env->pending_int &= ~INTERRUPT_EXT;
594 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
595 env->psw.mask, env->psw.addr);
597 load_psw(env, mask, addr);
600 void do_interrupt (CPUS390XState *env)
602 qemu_log("%s: %d at pc=%" PRIx64 "\n", __FUNCTION__, env->exception_index,
605 s390_add_running_cpu(env);
606 /* handle external interrupts */
607 if ((env->psw.mask & PSW_MASK_EXT) &&
608 env->exception_index == -1) {
609 if (env->pending_int & INTERRUPT_EXT) {
610 /* code is already in env */
611 env->exception_index = EXCP_EXT;
612 } else if (env->pending_int & INTERRUPT_TOD) {
613 cpu_inject_ext(env, 0x1004, 0, 0);
614 env->exception_index = EXCP_EXT;
615 env->pending_int &= ~INTERRUPT_EXT;
616 env->pending_int &= ~INTERRUPT_TOD;
617 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
618 cpu_inject_ext(env, 0x1005, 0, 0);
619 env->exception_index = EXCP_EXT;
620 env->pending_int &= ~INTERRUPT_EXT;
621 env->pending_int &= ~INTERRUPT_TOD;
625 switch (env->exception_index) {
627 do_program_interrupt(env);
630 do_svc_interrupt(env);
633 do_ext_interrupt(env);
636 env->exception_index = -1;
638 if (!env->pending_int) {
639 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
643 #endif /* CONFIG_USER_ONLY */