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 S390CPU *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 #else /* !CONFIG_USER_ONLY */
111 /* Ensure to exit the TB after this call! */
112 static void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilc)
114 env->exception_index = EXCP_PGM;
115 env->int_pgm_code = code;
116 env->int_pgm_ilc = ilc;
119 static int trans_bits(CPUS390XState *env, uint64_t mode)
124 case PSW_ASC_PRIMARY:
127 case PSW_ASC_SECONDARY:
134 cpu_abort(env, "unknown asc mode\n");
141 static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr, uint64_t mode)
143 int ilc = ILC_LATER_INC_2;
144 int bits = trans_bits(env, mode) | 4;
146 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
148 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
149 trigger_pgm_exception(env, PGM_PROTECTION, ilc);
152 static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr, uint32_t type,
153 uint64_t asc, int rw)
156 int bits = trans_bits(env, asc);
159 /* code has is undefined ilc */
163 DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __FUNCTION__, vaddr, bits);
165 stq_phys(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
166 trigger_pgm_exception(env, type, ilc);
169 static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
170 uint64_t asce, int level, target_ulong *raddr,
177 PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __FUNCTION__, asce);
179 if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
180 ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
181 /* XXX different regions have different faults */
182 DPRINTF("%s: invalid region\n", __FUNCTION__);
183 trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
187 if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
188 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
192 if (asce & _ASCE_REAL_SPACE) {
199 origin = asce & _ASCE_ORIGIN;
202 case _ASCE_TYPE_REGION1 + 4:
203 offs = (vaddr >> 50) & 0x3ff8;
205 case _ASCE_TYPE_REGION1:
206 offs = (vaddr >> 39) & 0x3ff8;
208 case _ASCE_TYPE_REGION2:
209 offs = (vaddr >> 28) & 0x3ff8;
211 case _ASCE_TYPE_REGION3:
212 offs = (vaddr >> 17) & 0x3ff8;
214 case _ASCE_TYPE_SEGMENT:
215 offs = (vaddr >> 9) & 0x07f8;
216 origin = asce & _SEGMENT_ENTRY_ORIGIN;
220 /* XXX region protection flags */
221 /* *flags &= ~PAGE_WRITE */
223 new_asce = ldq_phys(origin + offs);
224 PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
225 __FUNCTION__, origin, offs, new_asce);
227 if (level != _ASCE_TYPE_SEGMENT) {
228 /* yet another region */
229 return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
234 if (new_asce & _PAGE_INVALID) {
235 DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __FUNCTION__, new_asce);
236 trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
240 if (new_asce & _PAGE_RO) {
241 *flags &= ~PAGE_WRITE;
244 *raddr = new_asce & _ASCE_ORIGIN;
246 PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __FUNCTION__, new_asce);
251 static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr, uint64_t asc,
252 target_ulong *raddr, int *flags, int rw)
255 int level, new_level;
259 case PSW_ASC_PRIMARY:
260 PTE_DPRINTF("%s: asc=primary\n", __FUNCTION__);
261 asce = env->cregs[1];
263 case PSW_ASC_SECONDARY:
264 PTE_DPRINTF("%s: asc=secondary\n", __FUNCTION__);
265 asce = env->cregs[7];
268 PTE_DPRINTF("%s: asc=home\n", __FUNCTION__);
269 asce = env->cregs[13];
273 switch (asce & _ASCE_TYPE_MASK) {
274 case _ASCE_TYPE_REGION1:
276 case _ASCE_TYPE_REGION2:
277 if (vaddr & 0xffe0000000000000ULL) {
278 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
279 " 0xffe0000000000000ULL\n", __FUNCTION__,
281 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
285 case _ASCE_TYPE_REGION3:
286 if (vaddr & 0xfffffc0000000000ULL) {
287 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
288 " 0xfffffc0000000000ULL\n", __FUNCTION__,
290 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
294 case _ASCE_TYPE_SEGMENT:
295 if (vaddr & 0xffffffff80000000ULL) {
296 DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
297 " 0xffffffff80000000ULL\n", __FUNCTION__,
299 trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
305 /* fake level above current */
306 level = asce & _ASCE_TYPE_MASK;
307 new_level = level + 4;
308 asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
310 r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
312 if ((rw == 1) && !(*flags & PAGE_WRITE)) {
313 trigger_prot_fault(env, vaddr, asc);
320 int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
321 target_ulong *raddr, int *flags)
326 *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
327 vaddr &= TARGET_PAGE_MASK;
329 if (!(env->psw.mask & PSW_MASK_DAT)) {
336 case PSW_ASC_PRIMARY:
338 r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
340 case PSW_ASC_SECONDARY:
342 * Instruction: Primary
346 r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
348 *flags &= ~(PAGE_READ | PAGE_WRITE);
350 r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
352 *flags &= ~(PAGE_EXEC);
357 hw_error("guest switched to unknown asc mode\n");
362 /* Convert real address -> absolute address */
363 if (*raddr < 0x2000) {
364 *raddr = *raddr + env->psa;
367 if (*raddr <= ram_size) {
368 sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
369 if (*flags & PAGE_READ) {
373 if (*flags & PAGE_WRITE) {
381 int cpu_s390x_handle_mmu_fault (CPUS390XState *env, target_ulong _vaddr, int rw,
384 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
385 target_ulong vaddr, raddr;
388 DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
389 __FUNCTION__, _vaddr, rw, mmu_idx);
391 _vaddr &= TARGET_PAGE_MASK;
395 if (!(env->psw.mask & PSW_MASK_64)) {
399 if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
400 /* Translation ended in exception */
404 /* check out of RAM access */
405 if (raddr > (ram_size + virtio_size)) {
406 DPRINTF("%s: aaddr %" PRIx64 " > ram_size %" PRIx64 "\n", __FUNCTION__,
407 (uint64_t)aaddr, (uint64_t)ram_size);
408 trigger_pgm_exception(env, PGM_ADDRESSING, ILC_LATER);
412 DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __FUNCTION__,
413 (uint64_t)vaddr, (uint64_t)raddr, prot);
415 tlb_set_page(env, _vaddr, raddr, prot,
416 mmu_idx, TARGET_PAGE_SIZE);
421 target_phys_addr_t cpu_get_phys_page_debug(CPUS390XState *env, target_ulong vaddr)
424 int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
425 int old_exc = env->exception_index;
426 uint64_t asc = env->psw.mask & PSW_MASK_ASC;
429 if (!(env->psw.mask & PSW_MASK_64)) {
433 mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
434 env->exception_index = old_exc;
439 void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
441 if (mask & PSW_MASK_WAIT) {
442 if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
443 if (s390_del_running_cpu(env) == 0) {
444 #ifndef CONFIG_USER_ONLY
445 qemu_system_shutdown_request();
450 env->exception_index = EXCP_HLT;
453 env->psw.addr = addr;
454 env->psw.mask = mask;
455 env->cc_op = (mask >> 13) & 3;
458 static uint64_t get_psw_mask(CPUS390XState *env)
460 uint64_t r = env->psw.mask;
462 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 |= env->cc_op << 13;
471 static void do_svc_interrupt(CPUS390XState *env)
475 target_phys_addr_t len = TARGET_PAGE_SIZE;
477 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
479 lowcore->svc_code = cpu_to_be16(env->int_svc_code);
480 lowcore->svc_ilc = cpu_to_be16(env->int_svc_ilc);
481 lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
482 lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + (env->int_svc_ilc));
483 mask = be64_to_cpu(lowcore->svc_new_psw.mask);
484 addr = be64_to_cpu(lowcore->svc_new_psw.addr);
486 cpu_physical_memory_unmap(lowcore, len, 1, len);
488 load_psw(env, mask, addr);
491 static void do_program_interrupt(CPUS390XState *env)
495 target_phys_addr_t len = TARGET_PAGE_SIZE;
496 int ilc = env->int_pgm_ilc;
500 ilc = get_ilc(ldub_code(env->psw.addr));
503 ilc = get_ilc(ldub_code(env->psw.addr));
504 env->psw.addr += ilc * 2;
506 case ILC_LATER_INC_2:
507 ilc = get_ilc(ldub_code(env->psw.addr)) * 2;
508 env->psw.addr += ilc;
512 qemu_log("%s: code=0x%x ilc=%d\n", __FUNCTION__, env->int_pgm_code, ilc);
514 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
516 lowcore->pgm_ilc = cpu_to_be16(ilc);
517 lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
518 lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
519 lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
520 mask = be64_to_cpu(lowcore->program_new_psw.mask);
521 addr = be64_to_cpu(lowcore->program_new_psw.addr);
523 cpu_physical_memory_unmap(lowcore, len, 1, len);
525 DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
526 env->int_pgm_code, ilc, env->psw.mask,
529 load_psw(env, mask, addr);
532 #define VIRTIO_SUBCODE_64 0x0D00
534 static void do_ext_interrupt(CPUS390XState *env)
538 target_phys_addr_t len = TARGET_PAGE_SIZE;
541 if (!(env->psw.mask & PSW_MASK_EXT)) {
542 cpu_abort(env, "Ext int w/o ext mask\n");
545 if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
546 cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
549 q = &env->ext_queue[env->ext_index];
550 lowcore = cpu_physical_memory_map(env->psa, &len, 1);
552 lowcore->ext_int_code = cpu_to_be16(q->code);
553 lowcore->ext_params = cpu_to_be32(q->param);
554 lowcore->ext_params2 = cpu_to_be64(q->param64);
555 lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
556 lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
557 lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
558 mask = be64_to_cpu(lowcore->external_new_psw.mask);
559 addr = be64_to_cpu(lowcore->external_new_psw.addr);
561 cpu_physical_memory_unmap(lowcore, len, 1, len);
564 if (env->ext_index == -1) {
565 env->pending_int &= ~INTERRUPT_EXT;
568 DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __FUNCTION__,
569 env->psw.mask, env->psw.addr);
571 load_psw(env, mask, addr);
574 void do_interrupt (CPUS390XState *env)
576 qemu_log("%s: %d at pc=%" PRIx64 "\n", __FUNCTION__, env->exception_index,
579 s390_add_running_cpu(env);
580 /* handle external interrupts */
581 if ((env->psw.mask & PSW_MASK_EXT) &&
582 env->exception_index == -1) {
583 if (env->pending_int & INTERRUPT_EXT) {
584 /* code is already in env */
585 env->exception_index = EXCP_EXT;
586 } else if (env->pending_int & INTERRUPT_TOD) {
587 cpu_inject_ext(env, 0x1004, 0, 0);
588 env->exception_index = EXCP_EXT;
589 env->pending_int &= ~INTERRUPT_EXT;
590 env->pending_int &= ~INTERRUPT_TOD;
591 } else if (env->pending_int & INTERRUPT_CPUTIMER) {
592 cpu_inject_ext(env, 0x1005, 0, 0);
593 env->exception_index = EXCP_EXT;
594 env->pending_int &= ~INTERRUPT_EXT;
595 env->pending_int &= ~INTERRUPT_TOD;
599 switch (env->exception_index) {
601 do_program_interrupt(env);
604 do_svc_interrupt(env);
607 do_ext_interrupt(env);
610 env->exception_index = -1;
612 if (!env->pending_int) {
613 env->interrupt_request &= ~CPU_INTERRUPT_HARD;
617 #endif /* CONFIG_USER_ONLY */