* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
+#include "qemu/osdep.h"
#include "cpu.h"
#include "exec/gdbstub.h"
#include "qemu/timer.h"
+#include "exec/cpu_ldst.h"
#ifndef CONFIG_USER_ONLY
#include "sysemu/sysemu.h"
#endif
//#define DEBUG_S390
-//#define DEBUG_S390_PTE
//#define DEBUG_S390_STDOUT
#ifdef DEBUG_S390
#ifdef DEBUG_S390_STDOUT
#define DPRINTF(fmt, ...) \
do { fprintf(stderr, fmt, ## __VA_ARGS__); \
- qemu_log(fmt, ##__VA_ARGS__); } while (0)
+ if (qemu_log_separate()) qemu_log(fmt, ##__VA_ARGS__); } while (0)
#else
#define DPRINTF(fmt, ...) \
do { qemu_log(fmt, ## __VA_ARGS__); } while (0)
do { } while (0)
#endif
-#ifdef DEBUG_S390_PTE
-#define PTE_DPRINTF DPRINTF
-#else
-#define PTE_DPRINTF(fmt, ...) \
- do { } while (0)
-#endif
#ifndef CONFIG_USER_ONLY
void s390x_tod_timer(void *opaque)
#else /* !CONFIG_USER_ONLY */
/* Ensure to exit the TB after this call! */
-static void trigger_pgm_exception(CPUS390XState *env, uint32_t code,
- uint32_t ilen)
+void trigger_pgm_exception(CPUS390XState *env, uint32_t code, uint32_t ilen)
{
CPUState *cs = CPU(s390_env_get_cpu(env));
env->int_pgm_ilen = ilen;
}
-static int trans_bits(CPUS390XState *env, uint64_t mode)
-{
- S390CPU *cpu = s390_env_get_cpu(env);
- int bits = 0;
-
- switch (mode) {
- case PSW_ASC_PRIMARY:
- bits = 1;
- break;
- case PSW_ASC_SECONDARY:
- bits = 2;
- break;
- case PSW_ASC_HOME:
- bits = 3;
- break;
- default:
- cpu_abort(CPU(cpu), "unknown asc mode\n");
- break;
- }
-
- return bits;
-}
-
-static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
- uint64_t mode)
-{
- CPUState *cs = CPU(s390_env_get_cpu(env));
- int ilen = ILEN_LATER_INC;
- int bits = trans_bits(env, mode) | 4;
-
- DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
-
- stq_phys(cs->as,
- env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
- trigger_pgm_exception(env, PGM_PROTECTION, ilen);
-}
-
-static void trigger_page_fault(CPUS390XState *env, target_ulong vaddr,
- uint32_t type, uint64_t asc, int rw)
-{
- CPUState *cs = CPU(s390_env_get_cpu(env));
- int ilen = ILEN_LATER;
- int bits = trans_bits(env, asc);
-
- /* Code accesses have an undefined ilc. */
- if (rw == 2) {
- ilen = 2;
- }
-
- DPRINTF("%s: vaddr=%016" PRIx64 " bits=%d\n", __func__, vaddr, bits);
-
- stq_phys(cs->as,
- env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
- trigger_pgm_exception(env, type, ilen);
-}
-
-/**
- * Translate real address to absolute (= physical)
- * address by taking care of the prefix mapping.
- */
-static target_ulong mmu_real2abs(CPUS390XState *env, target_ulong raddr)
-{
- if (raddr < 0x2000) {
- return raddr + env->psa; /* Map the lowcore. */
- } else if (raddr >= env->psa && raddr < env->psa + 0x2000) {
- return raddr - env->psa; /* Map the 0 page. */
- }
- return raddr;
-}
-
-/* Decode page table entry (normal 4KB page) */
-static int mmu_translate_pte(CPUS390XState *env, target_ulong vaddr,
- uint64_t asc, uint64_t asce,
- target_ulong *raddr, int *flags, int rw)
-{
- if (asce & _PAGE_INVALID) {
- DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, asce);
- trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
- return -1;
- }
-
- if (asce & _PAGE_RO) {
- *flags &= ~PAGE_WRITE;
- }
-
- *raddr = asce & _ASCE_ORIGIN;
-
- PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, asce);
-
- return 0;
-}
-
-/* Decode EDAT1 segment frame absolute address (1MB page) */
-static int mmu_translate_sfaa(CPUS390XState *env, target_ulong vaddr,
- uint64_t asc, uint64_t asce, target_ulong *raddr,
- int *flags, int rw)
-{
- if (asce & _SEGMENT_ENTRY_INV) {
- DPRINTF("%s: SEG=0x%" PRIx64 " invalid\n", __func__, asce);
- trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
- return -1;
- }
-
- if (asce & _SEGMENT_ENTRY_RO) {
- *flags &= ~PAGE_WRITE;
- }
-
- *raddr = (asce & 0xfffffffffff00000ULL) | (vaddr & 0xfffff);
-
- PTE_DPRINTF("%s: SEG=0x%" PRIx64 "\n", __func__, asce);
-
- return 0;
-}
-
-static int mmu_translate_asce(CPUS390XState *env, target_ulong vaddr,
- uint64_t asc, uint64_t asce, int level,
- target_ulong *raddr, int *flags, int rw)
-{
- CPUState *cs = CPU(s390_env_get_cpu(env));
- uint64_t offs = 0;
- uint64_t origin;
- uint64_t new_asce;
-
- PTE_DPRINTF("%s: 0x%" PRIx64 "\n", __func__, asce);
-
- if (((level != _ASCE_TYPE_SEGMENT) && (asce & _REGION_ENTRY_INV)) ||
- ((level == _ASCE_TYPE_SEGMENT) && (asce & _SEGMENT_ENTRY_INV))) {
- /* XXX different regions have different faults */
- DPRINTF("%s: invalid region\n", __func__);
- trigger_page_fault(env, vaddr, PGM_SEGMENT_TRANS, asc, rw);
- return -1;
- }
-
- if ((level <= _ASCE_TYPE_MASK) && ((asce & _ASCE_TYPE_MASK) != level)) {
- trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
- return -1;
- }
-
- if (asce & _ASCE_REAL_SPACE) {
- /* direct mapping */
-
- *raddr = vaddr;
- return 0;
- }
-
- origin = asce & _ASCE_ORIGIN;
-
- switch (level) {
- case _ASCE_TYPE_REGION1 + 4:
- offs = (vaddr >> 50) & 0x3ff8;
- break;
- case _ASCE_TYPE_REGION1:
- offs = (vaddr >> 39) & 0x3ff8;
- break;
- case _ASCE_TYPE_REGION2:
- offs = (vaddr >> 28) & 0x3ff8;
- break;
- case _ASCE_TYPE_REGION3:
- offs = (vaddr >> 17) & 0x3ff8;
- break;
- case _ASCE_TYPE_SEGMENT:
- offs = (vaddr >> 9) & 0x07f8;
- origin = asce & _SEGMENT_ENTRY_ORIGIN;
- break;
- }
-
- /* XXX region protection flags */
- /* *flags &= ~PAGE_WRITE */
-
- new_asce = ldq_phys(cs->as, origin + offs);
- PTE_DPRINTF("%s: 0x%" PRIx64 " + 0x%" PRIx64 " => 0x%016" PRIx64 "\n",
- __func__, origin, offs, new_asce);
-
- if (level == _ASCE_TYPE_SEGMENT) {
- /* 4KB page */
- return mmu_translate_pte(env, vaddr, asc, new_asce, raddr, flags, rw);
- } else if (level - 4 == _ASCE_TYPE_SEGMENT &&
- (new_asce & _SEGMENT_ENTRY_FC) && (env->cregs[0] & CR0_EDAT)) {
- /* 1MB page */
- return mmu_translate_sfaa(env, vaddr, asc, new_asce, raddr, flags, rw);
- } else {
- /* yet another region */
- return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
- flags, rw);
- }
-}
-
-static int mmu_translate_asc(CPUS390XState *env, target_ulong vaddr,
- uint64_t asc, target_ulong *raddr, int *flags,
- int rw)
-{
- uint64_t asce = 0;
- int level, new_level;
- int r;
-
- switch (asc) {
- case PSW_ASC_PRIMARY:
- PTE_DPRINTF("%s: asc=primary\n", __func__);
- asce = env->cregs[1];
- break;
- case PSW_ASC_SECONDARY:
- PTE_DPRINTF("%s: asc=secondary\n", __func__);
- asce = env->cregs[7];
- break;
- case PSW_ASC_HOME:
- PTE_DPRINTF("%s: asc=home\n", __func__);
- asce = env->cregs[13];
- break;
- }
-
- switch (asce & _ASCE_TYPE_MASK) {
- case _ASCE_TYPE_REGION1:
- break;
- case _ASCE_TYPE_REGION2:
- if (vaddr & 0xffe0000000000000ULL) {
- DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
- " 0xffe0000000000000ULL\n", __func__, vaddr);
- trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
- return -1;
- }
- break;
- case _ASCE_TYPE_REGION3:
- if (vaddr & 0xfffffc0000000000ULL) {
- DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
- " 0xfffffc0000000000ULL\n", __func__, vaddr);
- trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
- return -1;
- }
- break;
- case _ASCE_TYPE_SEGMENT:
- if (vaddr & 0xffffffff80000000ULL) {
- DPRINTF("%s: vaddr doesn't fit 0x%16" PRIx64
- " 0xffffffff80000000ULL\n", __func__, vaddr);
- trigger_page_fault(env, vaddr, PGM_TRANS_SPEC, asc, rw);
- return -1;
- }
- break;
- }
-
- /* fake level above current */
- level = asce & _ASCE_TYPE_MASK;
- new_level = level + 4;
- asce = (asce & ~_ASCE_TYPE_MASK) | (new_level & _ASCE_TYPE_MASK);
-
- r = mmu_translate_asce(env, vaddr, asc, asce, new_level, raddr, flags, rw);
-
- if ((rw == 1) && !(*flags & PAGE_WRITE)) {
- trigger_prot_fault(env, vaddr, asc);
- return -1;
- }
-
- return r;
-}
-
-int mmu_translate(CPUS390XState *env, target_ulong vaddr, int rw, uint64_t asc,
- target_ulong *raddr, int *flags)
-{
- int r = -1;
- uint8_t *sk;
-
- *flags = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
- vaddr &= TARGET_PAGE_MASK;
-
- if (!(env->psw.mask & PSW_MASK_DAT)) {
- *raddr = vaddr;
- r = 0;
- goto out;
- }
-
- switch (asc) {
- case PSW_ASC_PRIMARY:
- case PSW_ASC_HOME:
- r = mmu_translate_asc(env, vaddr, asc, raddr, flags, rw);
- break;
- case PSW_ASC_SECONDARY:
- /*
- * Instruction: Primary
- * Data: Secondary
- */
- if (rw == 2) {
- r = mmu_translate_asc(env, vaddr, PSW_ASC_PRIMARY, raddr, flags,
- rw);
- *flags &= ~(PAGE_READ | PAGE_WRITE);
- } else {
- r = mmu_translate_asc(env, vaddr, PSW_ASC_SECONDARY, raddr, flags,
- rw);
- *flags &= ~(PAGE_EXEC);
- }
- break;
- case PSW_ASC_ACCREG:
- default:
- hw_error("guest switched to unknown asc mode\n");
- break;
- }
-
- out:
- /* Convert real address -> absolute address */
- *raddr = mmu_real2abs(env, *raddr);
-
- if (*raddr <= ram_size) {
- sk = &env->storage_keys[*raddr / TARGET_PAGE_SIZE];
- if (*flags & PAGE_READ) {
- *sk |= SK_R;
- }
-
- if (*flags & PAGE_WRITE) {
- *sk |= SK_C;
- }
- }
-
- return r;
-}
-
int s390_cpu_handle_mmu_fault(CPUState *cs, vaddr orig_vaddr,
int rw, int mmu_idx)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
- uint64_t asc = env->psw.mask & PSW_MASK_ASC;
+ uint64_t asc = cpu_mmu_idx_to_asc(mmu_idx);
target_ulong vaddr, raddr;
int prot;
vaddr &= 0x7fffffff;
}
- if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
+ if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot, true)) {
/* Translation ended in exception */
return 1;
}
/* check out of RAM access */
- if (raddr > (ram_size + virtio_size)) {
+ if (raddr > ram_size) {
DPRINTF("%s: raddr %" PRIx64 " > ram_size %" PRIx64 "\n", __func__,
(uint64_t)raddr, (uint64_t)ram_size);
trigger_pgm_exception(env, PGM_ADDRESSING, ILEN_LATER);
return 1;
}
- DPRINTF("%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n", __func__,
- (uint64_t)vaddr, (uint64_t)raddr, prot);
+ qemu_log_mask(CPU_LOG_MMU, "%s: set tlb %" PRIx64 " -> %" PRIx64 " (%x)\n",
+ __func__, (uint64_t)vaddr, (uint64_t)raddr, prot);
tlb_set_page(cs, orig_vaddr, raddr, prot,
mmu_idx, TARGET_PAGE_SIZE);
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
target_ulong raddr;
- int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
- int old_exc = cs->exception_index;
+ int prot;
uint64_t asc = env->psw.mask & PSW_MASK_ASC;
/* 31-Bit mode */
vaddr &= 0x7fffffff;
}
- mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
- cs->exception_index = old_exc;
-
+ if (mmu_translate(env, vaddr, MMU_INST_FETCH, asc, &raddr, &prot, false)) {
+ return -1;
+ }
return raddr;
}
+hwaddr s390_cpu_get_phys_addr_debug(CPUState *cs, vaddr vaddr)
+{
+ hwaddr phys_addr;
+ target_ulong page;
+
+ page = vaddr & TARGET_PAGE_MASK;
+ phys_addr = cpu_get_phys_page_debug(cs, page);
+ phys_addr += (vaddr & ~TARGET_PAGE_MASK);
+
+ return phys_addr;
+}
+
void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
{
+ uint64_t old_mask = env->psw.mask;
+
+ env->psw.addr = addr;
+ env->psw.mask = mask;
+ if (tcg_enabled()) {
+ env->cc_op = (mask >> 44) & 3;
+ }
+
+ if ((old_mask ^ mask) & PSW_MASK_PER) {
+ s390_cpu_recompute_watchpoints(CPU(s390_env_get_cpu(env)));
+ }
+
if (mask & PSW_MASK_WAIT) {
S390CPU *cpu = s390_env_get_cpu(env);
- CPUState *cs = CPU(cpu);
- if (!(mask & (PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK))) {
- if (s390_del_running_cpu(cpu) == 0) {
+ if (s390_cpu_halt(cpu) == 0) {
#ifndef CONFIG_USER_ONLY
- qemu_system_shutdown_request();
+ qemu_system_shutdown_request();
#endif
- }
}
- cs->halted = 1;
- cs->exception_index = EXCP_HLT;
}
-
- env->psw.addr = addr;
- env->psw.mask = mask;
- env->cc_op = (mask >> 44) & 3;
}
static uint64_t get_psw_mask(CPUS390XState *env)
{
- uint64_t r;
+ uint64_t r = env->psw.mask;
- env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst, env->cc_vr);
+ if (tcg_enabled()) {
+ env->cc_op = calc_cc(env, env->cc_op, env->cc_src, env->cc_dst,
+ env->cc_vr);
- r = env->psw.mask;
- r &= ~PSW_MASK_CC;
- assert(!(env->cc_op & ~3));
- r |= (uint64_t)env->cc_op << 44;
+ r &= ~PSW_MASK_CC;
+ assert(!(env->cc_op & ~3));
+ r |= (uint64_t)env->cc_op << 44;
+ }
return r;
}
cpu_physical_memory_unmap(lowcore, sizeof(LowCore), 1, sizeof(LowCore));
}
-void *s390_cpu_physical_memory_map(CPUS390XState *env, hwaddr addr, hwaddr *len,
- int is_write)
-{
- hwaddr start = addr;
-
- /* Mind the prefix area. */
- if (addr < 8192) {
- /* Map the lowcore. */
- start += env->psa;
- *len = MIN(*len, 8192 - addr);
- } else if ((addr >= env->psa) && (addr < env->psa + 8192)) {
- /* Map the 0 page. */
- start -= env->psa;
- *len = MIN(*len, 8192 - start);
- }
-
- return cpu_physical_memory_map(start, len, is_write);
-}
-
-void s390_cpu_physical_memory_unmap(CPUS390XState *env, void *addr, hwaddr len,
- int is_write)
-{
- cpu_physical_memory_unmap(addr, len, is_write, len);
-}
-
-static void do_svc_interrupt(CPUS390XState *env)
+void do_restart_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
lowcore = cpu_map_lowcore(env);
- lowcore->svc_code = cpu_to_be16(env->int_svc_code);
- lowcore->svc_ilen = cpu_to_be16(env->int_svc_ilen);
- lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
- lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + env->int_svc_ilen);
- mask = be64_to_cpu(lowcore->svc_new_psw.mask);
- addr = be64_to_cpu(lowcore->svc_new_psw.addr);
+ lowcore->restart_old_psw.mask = cpu_to_be64(get_psw_mask(env));
+ lowcore->restart_old_psw.addr = cpu_to_be64(env->psw.addr);
+ mask = be64_to_cpu(lowcore->restart_new_psw.mask);
+ addr = be64_to_cpu(lowcore->restart_new_psw.addr);
cpu_unmap_lowcore(lowcore);
lowcore = cpu_map_lowcore(env);
+ /* Signal PER events with the exception. */
+ if (env->per_perc_atmid) {
+ env->int_pgm_code |= PGM_PER;
+ lowcore->per_address = cpu_to_be64(env->per_address);
+ lowcore->per_perc_atmid = cpu_to_be16(env->per_perc_atmid);
+ env->per_perc_atmid = 0;
+ }
+
lowcore->pgm_ilen = cpu_to_be16(ilen);
lowcore->pgm_code = cpu_to_be16(env->int_pgm_code);
lowcore->program_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->program_old_psw.addr = cpu_to_be64(env->psw.addr);
mask = be64_to_cpu(lowcore->program_new_psw.mask);
addr = be64_to_cpu(lowcore->program_new_psw.addr);
+ lowcore->per_breaking_event_addr = cpu_to_be64(env->gbea);
cpu_unmap_lowcore(lowcore);
load_psw(env, mask, addr);
}
+static void do_svc_interrupt(CPUS390XState *env)
+{
+ uint64_t mask, addr;
+ LowCore *lowcore;
+
+ lowcore = cpu_map_lowcore(env);
+
+ lowcore->svc_code = cpu_to_be16(env->int_svc_code);
+ lowcore->svc_ilen = cpu_to_be16(env->int_svc_ilen);
+ lowcore->svc_old_psw.mask = cpu_to_be64(get_psw_mask(env));
+ lowcore->svc_old_psw.addr = cpu_to_be64(env->psw.addr + env->int_svc_ilen);
+ mask = be64_to_cpu(lowcore->svc_new_psw.mask);
+ addr = be64_to_cpu(lowcore->svc_new_psw.addr);
+
+ cpu_unmap_lowcore(lowcore);
+
+ load_psw(env, mask, addr);
+
+ /* When a PER event is pending, the PER exception has to happen
+ immediately after the SERVICE CALL one. */
+ if (env->per_perc_atmid) {
+ env->int_pgm_code = PGM_PER;
+ env->int_pgm_ilen = env->int_svc_ilen;
+ do_program_interrupt(env);
+ }
+}
+
#define VIRTIO_SUBCODE_64 0x0D00
static void do_ext_interrupt(CPUS390XState *env)
cpu_abort(CPU(cpu), "Ext int w/o ext mask\n");
}
- if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
+ if (env->ext_index < 0 || env->ext_index >= MAX_EXT_QUEUE) {
cpu_abort(CPU(cpu), "Ext queue overrun: %d\n", env->ext_index);
}
if (env->io_index[isc] < 0) {
continue;
}
- if (env->io_index[isc] > MAX_IO_QUEUE) {
+ if (env->io_index[isc] >= MAX_IO_QUEUE) {
cpu_abort(CPU(cpu), "I/O queue overrun for isc %d: %d\n",
isc, env->io_index[isc]);
}
cpu_abort(CPU(cpu), "Machine check w/o mchk mask\n");
}
- if (env->mchk_index < 0 || env->mchk_index > MAX_MCHK_QUEUE) {
+ if (env->mchk_index < 0 || env->mchk_index >= MAX_MCHK_QUEUE) {
cpu_abort(CPU(cpu), "Mchk queue overrun: %d\n", env->mchk_index);
}
lowcore = cpu_map_lowcore(env);
for (i = 0; i < 16; i++) {
- lowcore->floating_pt_save_area[i] = cpu_to_be64(env->fregs[i].ll);
+ lowcore->floating_pt_save_area[i] = cpu_to_be64(get_freg(env, i)->ll);
lowcore->gpregs_save_area[i] = cpu_to_be64(env->regs[i]);
lowcore->access_regs_save_area[i] = cpu_to_be32(env->aregs[i]);
lowcore->cregs_save_area[i] = cpu_to_be64(env->cregs[i]);
qemu_log_mask(CPU_LOG_INT, "%s: %d at pc=%" PRIx64 "\n",
__func__, cs->exception_index, env->psw.addr);
- s390_add_running_cpu(cpu);
+ s390_cpu_set_state(CPU_STATE_OPERATING, cpu);
/* handle machine checks */
if ((env->psw.mask & PSW_MASK_MCHECK) &&
(cs->exception_index == -1)) {
}
}
+bool s390_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
+{
+ if (interrupt_request & CPU_INTERRUPT_HARD) {
+ S390CPU *cpu = S390_CPU(cs);
+ CPUS390XState *env = &cpu->env;
+
+ if (env->psw.mask & PSW_MASK_EXT) {
+ s390_cpu_do_interrupt(cs);
+ return true;
+ }
+ }
+ return false;
+}
+
+void s390_cpu_recompute_watchpoints(CPUState *cs)
+{
+ const int wp_flags = BP_CPU | BP_MEM_WRITE | BP_STOP_BEFORE_ACCESS;
+ S390CPU *cpu = S390_CPU(cs);
+ CPUS390XState *env = &cpu->env;
+
+ /* We are called when the watchpoints have changed. First
+ remove them all. */
+ cpu_watchpoint_remove_all(cs, BP_CPU);
+
+ /* Return if PER is not enabled */
+ if (!(env->psw.mask & PSW_MASK_PER)) {
+ return;
+ }
+
+ /* Return if storage-alteration event is not enabled. */
+ if (!(env->cregs[9] & PER_CR9_EVENT_STORE)) {
+ return;
+ }
+
+ if (env->cregs[10] == 0 && env->cregs[11] == -1LL) {
+ /* We can't create a watchoint spanning the whole memory range, so
+ split it in two parts. */
+ cpu_watchpoint_insert(cs, 0, 1ULL << 63, wp_flags, NULL);
+ cpu_watchpoint_insert(cs, 1ULL << 63, 1ULL << 63, wp_flags, NULL);
+ } else if (env->cregs[10] > env->cregs[11]) {
+ /* The address range loops, create two watchpoints. */
+ cpu_watchpoint_insert(cs, env->cregs[10], -env->cregs[10],
+ wp_flags, NULL);
+ cpu_watchpoint_insert(cs, 0, env->cregs[11] + 1, wp_flags, NULL);
+
+ } else {
+ /* Default case, create a single watchpoint. */
+ cpu_watchpoint_insert(cs, env->cregs[10],
+ env->cregs[11] - env->cregs[10] + 1,
+ wp_flags, NULL);
+ }
+}
+
+void s390x_cpu_debug_excp_handler(CPUState *cs)
+{
+ S390CPU *cpu = S390_CPU(cs);
+ CPUS390XState *env = &cpu->env;
+ CPUWatchpoint *wp_hit = cs->watchpoint_hit;
+
+ if (wp_hit && wp_hit->flags & BP_CPU) {
+ /* FIXME: When the storage-alteration-space control bit is set,
+ the exception should only be triggered if the memory access
+ is done using an address space with the storage-alteration-event
+ bit set. We have no way to detect that with the current
+ watchpoint code. */
+ cs->watchpoint_hit = NULL;
+
+ env->per_address = env->psw.addr;
+ env->per_perc_atmid |= PER_CODE_EVENT_STORE | get_per_atmid(env);
+ /* FIXME: We currently no way to detect the address space used
+ to trigger the watchpoint. For now just consider it is the
+ current default ASC. This turn to be true except when MVCP
+ and MVCS instrutions are not used. */
+ env->per_perc_atmid |= env->psw.mask & (PSW_MASK_ASC) >> 46;
+
+ /* Remove all watchpoints to re-execute the code. A PER exception
+ will be triggered, it will call load_psw which will recompute
+ the watchpoints. */
+ cpu_watchpoint_remove_all(cs, BP_CPU);
+ cpu_resume_from_signal(cs, NULL);
+ }
+}
#endif /* CONFIG_USER_ONLY */
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