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qemu/target-s390x/helper.c

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/*
* S/390 helpers
*
* Copyright (c) 2009 Ulrich Hecht
* Copyright (c) 2011 Alexander Graf
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "cpu.h"
#include "exec/gdbstub.h"
#include "qemu/timer.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)
#else
#define DPRINTF(fmt, ...) \
do { qemu_log(fmt, ## __VA_ARGS__); } while (0)
#endif
#else
#define DPRINTF(fmt, ...) \
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)
{
S390CPU *cpu = opaque;
CPUS390XState *env = &cpu->env;
env->pending_int |= INTERRUPT_TOD;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
void s390x_cpu_timer(void *opaque)
{
S390CPU *cpu = opaque;
CPUS390XState *env = &cpu->env;
env->pending_int |= INTERRUPT_CPUTIMER;
cpu_interrupt(CPU(cpu), CPU_INTERRUPT_HARD);
}
#endif
S390CPU *cpu_s390x_init(const char *cpu_model)
{
S390CPU *cpu;
cpu = S390_CPU(object_new(TYPE_S390_CPU));
object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
return cpu;
}
#if defined(CONFIG_USER_ONLY)
void s390_cpu_do_interrupt(CPUState *cs)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
env->exception_index = -1;
}
int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong address,
int rw, int mmu_idx)
{
env->exception_index = EXCP_PGM;
env->int_pgm_code = PGM_ADDRESSING;
/* On real machines this value is dropped into LowMem. Since this
is userland, simply put this someplace that cpu_loop can find it. */
env->__excp_addr = address;
return 1;
}
#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)
{
env->exception_index = EXCP_PGM;
env->int_pgm_code = code;
env->int_pgm_ilen = ilen;
}
static int trans_bits(CPUS390XState *env, uint64_t mode)
{
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(env, "unknown asc mode\n");
break;
}
return bits;
}
static void trigger_prot_fault(CPUS390XState *env, target_ulong vaddr,
uint64_t mode)
{
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(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)
{
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(env->psa + offsetof(LowCore, trans_exc_code), vaddr | bits);
trigger_pgm_exception(env, type, ilen);
}
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 = 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) {
/* yet another region */
return mmu_translate_asce(env, vaddr, asc, new_asce, level - 4, raddr,
flags, rw);
}
/* PTE */
if (new_asce & _PAGE_INVALID) {
DPRINTF("%s: PTE=0x%" PRIx64 " invalid\n", __func__, new_asce);
trigger_page_fault(env, vaddr, PGM_PAGE_TRANS, asc, rw);
return -1;
}
if (new_asce & _PAGE_RO) {
*flags &= ~PAGE_WRITE;
}
*raddr = new_asce & _ASCE_ORIGIN;
PTE_DPRINTF("%s: PTE=0x%" PRIx64 "\n", __func__, new_asce);
return 0;
}
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 */
if (*raddr < 0x2000) {
*raddr = *raddr + env->psa;
}
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 cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong orig_vaddr,
int rw, int mmu_idx)
{
uint64_t asc = env->psw.mask & PSW_MASK_ASC;
target_ulong vaddr, raddr;
int prot;
DPRINTF("%s: address 0x%" PRIx64 " rw %d mmu_idx %d\n",
__func__, orig_vaddr, rw, mmu_idx);
orig_vaddr &= TARGET_PAGE_MASK;
vaddr = orig_vaddr;
/* 31-Bit mode */
if (!(env->psw.mask & PSW_MASK_64)) {
vaddr &= 0x7fffffff;
}
if (mmu_translate(env, vaddr, rw, asc, &raddr, &prot)) {
/* Translation ended in exception */
return 1;
}
/* check out of RAM access */
if (raddr > (ram_size + virtio_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);
tlb_set_page(env, orig_vaddr, raddr, prot,
mmu_idx, TARGET_PAGE_SIZE);
return 0;
}
hwaddr s390_cpu_get_phys_page_debug(CPUState *cs, vaddr vaddr)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
target_ulong raddr;
int prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
int old_exc = env->exception_index;
uint64_t asc = env->psw.mask & PSW_MASK_ASC;
/* 31-Bit mode */
if (!(env->psw.mask & PSW_MASK_64)) {
vaddr &= 0x7fffffff;
}
mmu_translate(env, vaddr, 2, asc, &raddr, &prot);
env->exception_index = old_exc;
return raddr;
}
void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr)
{
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) {
#ifndef CONFIG_USER_ONLY
qemu_system_shutdown_request();
#endif
}
}
cs->halted = 1;
env->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;
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;
return r;
}
static LowCore *cpu_map_lowcore(CPUS390XState *env)
{
LowCore *lowcore;
hwaddr len = sizeof(LowCore);
lowcore = cpu_physical_memory_map(env->psa, &len, 1);
if (len < sizeof(LowCore)) {
cpu_abort(env, "Could not map lowcore\n");
}
return lowcore;
}
static void cpu_unmap_lowcore(LowCore *lowcore)
{
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)
{
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);
}
static void do_program_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
int ilen = env->int_pgm_ilen;
switch (ilen) {
case ILEN_LATER:
ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
break;
case ILEN_LATER_INC:
ilen = get_ilen(cpu_ldub_code(env, env->psw.addr));
env->psw.addr += ilen;
break;
default:
assert(ilen == 2 || ilen == 4 || ilen == 6);
}
qemu_log_mask(CPU_LOG_INT, "%s: code=0x%x ilen=%d\n",
__func__, env->int_pgm_code, ilen);
lowcore = cpu_map_lowcore(env);
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);
cpu_unmap_lowcore(lowcore);
DPRINTF("%s: %x %x %" PRIx64 " %" PRIx64 "\n", __func__,
env->int_pgm_code, ilen, env->psw.mask,
env->psw.addr);
load_psw(env, mask, addr);
}
#define VIRTIO_SUBCODE_64 0x0D00
static void do_ext_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
ExtQueue *q;
if (!(env->psw.mask & PSW_MASK_EXT)) {
cpu_abort(env, "Ext int w/o ext mask\n");
}
if (env->ext_index < 0 || env->ext_index > MAX_EXT_QUEUE) {
cpu_abort(env, "Ext queue overrun: %d\n", env->ext_index);
}
q = &env->ext_queue[env->ext_index];
lowcore = cpu_map_lowcore(env);
lowcore->ext_int_code = cpu_to_be16(q->code);
lowcore->ext_params = cpu_to_be32(q->param);
lowcore->ext_params2 = cpu_to_be64(q->param64);
lowcore->external_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->external_old_psw.addr = cpu_to_be64(env->psw.addr);
lowcore->cpu_addr = cpu_to_be16(env->cpu_num | VIRTIO_SUBCODE_64);
mask = be64_to_cpu(lowcore->external_new_psw.mask);
addr = be64_to_cpu(lowcore->external_new_psw.addr);
cpu_unmap_lowcore(lowcore);
env->ext_index--;
if (env->ext_index == -1) {
env->pending_int &= ~INTERRUPT_EXT;
}
DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
env->psw.mask, env->psw.addr);
load_psw(env, mask, addr);
}
static void do_io_interrupt(CPUS390XState *env)
{
LowCore *lowcore;
IOIntQueue *q;
uint8_t isc;
int disable = 1;
int found = 0;
if (!(env->psw.mask & PSW_MASK_IO)) {
cpu_abort(env, "I/O int w/o I/O mask\n");
}
for (isc = 0; isc < ARRAY_SIZE(env->io_index); isc++) {
uint64_t isc_bits;
if (env->io_index[isc] < 0) {
continue;
}
if (env->io_index[isc] > MAX_IO_QUEUE) {
cpu_abort(env, "I/O queue overrun for isc %d: %d\n",
isc, env->io_index[isc]);
}
q = &env->io_queue[env->io_index[isc]][isc];
isc_bits = ISC_TO_ISC_BITS(IO_INT_WORD_ISC(q->word));
if (!(env->cregs[6] & isc_bits)) {
disable = 0;
continue;
}
if (!found) {
uint64_t mask, addr;
found = 1;
lowcore = cpu_map_lowcore(env);
lowcore->subchannel_id = cpu_to_be16(q->id);
lowcore->subchannel_nr = cpu_to_be16(q->nr);
lowcore->io_int_parm = cpu_to_be32(q->parm);
lowcore->io_int_word = cpu_to_be32(q->word);
lowcore->io_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->io_old_psw.addr = cpu_to_be64(env->psw.addr);
mask = be64_to_cpu(lowcore->io_new_psw.mask);
addr = be64_to_cpu(lowcore->io_new_psw.addr);
cpu_unmap_lowcore(lowcore);
env->io_index[isc]--;
DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
env->psw.mask, env->psw.addr);
load_psw(env, mask, addr);
}
if (env->io_index[isc] >= 0) {
disable = 0;
}
continue;
}
if (disable) {
env->pending_int &= ~INTERRUPT_IO;
}
}
static void do_mchk_interrupt(CPUS390XState *env)
{
uint64_t mask, addr;
LowCore *lowcore;
MchkQueue *q;
int i;
if (!(env->psw.mask & PSW_MASK_MCHECK)) {
cpu_abort(env, "Machine check w/o mchk mask\n");
}
if (env->mchk_index < 0 || env->mchk_index > MAX_MCHK_QUEUE) {
cpu_abort(env, "Mchk queue overrun: %d\n", env->mchk_index);
}
q = &env->mchk_queue[env->mchk_index];
if (q->type != 1) {
/* Don't know how to handle this... */
cpu_abort(env, "Unknown machine check type %d\n", q->type);
}
if (!(env->cregs[14] & (1 << 28))) {
/* CRW machine checks disabled */
return;
}
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->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]);
}
lowcore->prefixreg_save_area = cpu_to_be32(env->psa);
lowcore->fpt_creg_save_area = cpu_to_be32(env->fpc);
lowcore->tod_progreg_save_area = cpu_to_be32(env->todpr);
lowcore->cpu_timer_save_area[0] = cpu_to_be32(env->cputm >> 32);
lowcore->cpu_timer_save_area[1] = cpu_to_be32((uint32_t)env->cputm);
lowcore->clock_comp_save_area[0] = cpu_to_be32(env->ckc >> 32);
lowcore->clock_comp_save_area[1] = cpu_to_be32((uint32_t)env->ckc);
lowcore->mcck_interruption_code[0] = cpu_to_be32(0x00400f1d);
lowcore->mcck_interruption_code[1] = cpu_to_be32(0x40330000);
lowcore->mcck_old_psw.mask = cpu_to_be64(get_psw_mask(env));
lowcore->mcck_old_psw.addr = cpu_to_be64(env->psw.addr);
mask = be64_to_cpu(lowcore->mcck_new_psw.mask);
addr = be64_to_cpu(lowcore->mcck_new_psw.addr);
cpu_unmap_lowcore(lowcore);
env->mchk_index--;
if (env->mchk_index == -1) {
env->pending_int &= ~INTERRUPT_MCHK;
}
DPRINTF("%s: %" PRIx64 " %" PRIx64 "\n", __func__,
env->psw.mask, env->psw.addr);
load_psw(env, mask, addr);
}
void s390_cpu_do_interrupt(CPUState *cs)
{
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
qemu_log_mask(CPU_LOG_INT, "%s: %d at pc=%" PRIx64 "\n",
__func__, env->exception_index, env->psw.addr);
s390_add_running_cpu(cpu);
/* handle machine checks */
if ((env->psw.mask & PSW_MASK_MCHECK) &&
(env->exception_index == -1)) {
if (env->pending_int & INTERRUPT_MCHK) {
env->exception_index = EXCP_MCHK;
}
}
/* handle external interrupts */
if ((env->psw.mask & PSW_MASK_EXT) &&
env->exception_index == -1) {
if (env->pending_int & INTERRUPT_EXT) {
/* code is already in env */
env->exception_index = EXCP_EXT;
} else if (env->pending_int & INTERRUPT_TOD) {
cpu_inject_ext(cpu, 0x1004, 0, 0);
env->exception_index = EXCP_EXT;
env->pending_int &= ~INTERRUPT_EXT;
env->pending_int &= ~INTERRUPT_TOD;
} else if (env->pending_int & INTERRUPT_CPUTIMER) {
cpu_inject_ext(cpu, 0x1005, 0, 0);
env->exception_index = EXCP_EXT;
env->pending_int &= ~INTERRUPT_EXT;
env->pending_int &= ~INTERRUPT_TOD;
}
}
/* handle I/O interrupts */
if ((env->psw.mask & PSW_MASK_IO) &&
(env->exception_index == -1)) {
if (env->pending_int & INTERRUPT_IO) {
env->exception_index = EXCP_IO;
}
}
switch (env->exception_index) {
case EXCP_PGM:
do_program_interrupt(env);
break;
case EXCP_SVC:
do_svc_interrupt(env);
break;
case EXCP_EXT:
do_ext_interrupt(env);
break;
case EXCP_IO:
do_io_interrupt(env);
break;
case EXCP_MCHK:
do_mchk_interrupt(env);
break;
}
env->exception_index = -1;
if (!env->pending_int) {
cs->interrupt_request &= ~CPU_INTERRUPT_HARD;
}
}
#endif /* CONFIG_USER_ONLY */
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