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/*
* S390x DIAG instruction helper functions
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*/
#include "qemu/osdep.h"
#include "cpu.h"
#include "internal.h"
#include "exec/address-spaces.h"
#include "exec/exec-all.h"
#include "hw/watchdog/wdt_diag288.h"
#include "sysemu/cpus.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/s390-virtio-ccw.h"
static int modified_clear_reset(S390CPU *cpu)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
CPUState *t;
pause_all_vcpus();
cpu_synchronize_all_states();
CPU_FOREACH(t) {
run_on_cpu(t, s390_do_cpu_full_reset, RUN_ON_CPU_NULL);
}
s390_cmma_reset();
subsystem_reset();
s390_crypto_reset();
scc->load_normal(CPU(cpu));
cpu_synchronize_all_post_reset();
resume_all_vcpus();
return 0;
}
static inline void s390_do_cpu_reset(CPUState *cs, run_on_cpu_data arg)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cs);
scc->cpu_reset(cs);
}
static int load_normal_reset(S390CPU *cpu)
{
S390CPUClass *scc = S390_CPU_GET_CLASS(cpu);
CPUState *t;
pause_all_vcpus();
cpu_synchronize_all_states();
CPU_FOREACH(t) {
run_on_cpu(t, s390_do_cpu_reset, RUN_ON_CPU_NULL);
}
s390_cmma_reset();
subsystem_reset();
scc->initial_cpu_reset(CPU(cpu));
scc->load_normal(CPU(cpu));
cpu_synchronize_all_post_reset();
resume_all_vcpus();
return 0;
}
int handle_diag_288(CPUS390XState *env, uint64_t r1, uint64_t r3)
{
uint64_t func = env->regs[r1];
uint64_t timeout = env->regs[r1 + 1];
uint64_t action = env->regs[r3];
Object *obj;
DIAG288State *diag288;
DIAG288Class *diag288_class;
if (r1 % 2 || action != 0) {
return -1;
}
/* Timeout must be more than 15 seconds except for timer deletion */
if (func != WDT_DIAG288_CANCEL && timeout < 15) {
return -1;
}
obj = object_resolve_path_type("", TYPE_WDT_DIAG288, NULL);
if (!obj) {
return -1;
}
diag288 = DIAG288(obj);
diag288_class = DIAG288_GET_CLASS(diag288);
return diag288_class->handle_timer(diag288, func, timeout);
}
#define DIAG_308_RC_OK 0x0001
#define DIAG_308_RC_NO_CONF 0x0102
#define DIAG_308_RC_INVALID 0x0402
void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra)
{
uint64_t addr = env->regs[r1];
uint64_t subcode = env->regs[r3];
IplParameterBlock *iplb;
if (env->psw.mask & PSW_MASK_PSTATE) {
s390_program_interrupt(env, PGM_PRIVILEGED, ILEN_AUTO, ra);
return;
}
if ((subcode & ~0x0ffffULL) || (subcode > 6)) {
s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
return;
}
switch (subcode) {
case 0:
modified_clear_reset(s390_env_get_cpu(env));
if (tcg_enabled()) {
cpu_loop_exit(CPU(s390_env_get_cpu(env)));
}
break;
case 1:
load_normal_reset(s390_env_get_cpu(env));
if (tcg_enabled()) {
cpu_loop_exit(CPU(s390_env_get_cpu(env)));
}
break;
case 3:
s390_reipl_request();
if (tcg_enabled()) {
cpu_loop_exit(CPU(s390_env_get_cpu(env)));
}
break;
case 5:
if ((r1 & 1) || (addr & 0x0fffULL)) {
s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
return;
}
if (!address_space_access_valid(&address_space_memory, addr,
sizeof(IplParameterBlock), false)) {
s390_program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO, ra);
return;
}
iplb = g_new0(IplParameterBlock, 1);
cpu_physical_memory_read(addr, iplb, sizeof(iplb->len));
if (!iplb_valid_len(iplb)) {
env->regs[r1 + 1] = DIAG_308_RC_INVALID;
goto out;
}
cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));
if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) {
env->regs[r1 + 1] = DIAG_308_RC_INVALID;
goto out;
}
s390_ipl_update_diag308(iplb);
env->regs[r1 + 1] = DIAG_308_RC_OK;
out:
g_free(iplb);
return;
case 6:
if ((r1 & 1) || (addr & 0x0fffULL)) {
s390_program_interrupt(env, PGM_SPECIFICATION, ILEN_AUTO, ra);
return;
}
if (!address_space_access_valid(&address_space_memory, addr,
sizeof(IplParameterBlock), true)) {
s390_program_interrupt(env, PGM_ADDRESSING, ILEN_AUTO, ra);
return;
}
iplb = s390_ipl_get_iplb();
if (iplb) {
cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len));
env->regs[r1 + 1] = DIAG_308_RC_OK;
} else {
env->regs[r1 + 1] = DIAG_308_RC_NO_CONF;
}
return;
default:
hw_error("Unhandled diag308 subcode %" PRIx64, subcode);
break;
}
}
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