From f5ae2a4fd8d573cfebaf24220e2920bb5074d9a6 Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Fri, 28 Jun 2013 10:51:09 +0200 Subject: s390/cpu: split CPU reset into architectured functions s390 provides several CPU resets: - CPU reset, clears interrupts, stop processing, clears TLB, but does not touch registers - initial CPU reset, like CPU reset, but also clears PSW, prefix, FPC, timer and control registers. It does not touch gprs, fprs and acrs (!) - Power on reset: the full monty wire up CPUClass reset to the full monty, but provide the lesser resets as part of S390CPUClass. Signed-off-by: Christian Borntraeger --- target-s390x/cpu.c | 38 +++++++++++++++++++++++++++++++++++--- 1 file changed, 35 insertions(+), 3 deletions(-) (limited to 'target-s390x/cpu.c') diff --git a/target-s390x/cpu.c b/target-s390x/cpu.c index 69f5e10..3c89f8a 100644 --- a/target-s390x/cpu.c +++ b/target-s390x/cpu.c @@ -76,7 +76,7 @@ static void s390_cpu_load_normal(CPUState *s) } #endif -/* CPUClass::reset() */ +/* S390CPUClass::cpu_reset() */ static void s390_cpu_reset(CPUState *s) { S390CPU *cpu = S390_CPU(s); @@ -84,6 +84,37 @@ static void s390_cpu_reset(CPUState *s) CPUS390XState *env = &cpu->env; s390_del_running_cpu(cpu); + scc->parent_reset(s); +#if !defined(CONFIG_USER_ONLY) + s->halted = 1; +#endif + tlb_flush(env, 1); +} + +/* S390CPUClass::initial_reset() */ +static void s390_cpu_initial_reset(CPUState *s) +{ + S390CPU *cpu = S390_CPU(s); + CPUS390XState *env = &cpu->env; + + s390_cpu_reset(s); + /* initial reset does not touch regs,fregs and aregs */ + memset(&env->fpc, 0, offsetof(CPUS390XState, breakpoints) - + offsetof(CPUS390XState, fpc)); + + /* architectured initial values for CR 0 and 14 */ + env->cregs[0] = CR0_RESET; + env->cregs[14] = CR14_RESET; +} + +/* CPUClass:reset() */ +static void s390_cpu_full_reset(CPUState *s) +{ + S390CPU *cpu = S390_CPU(s); + S390CPUClass *scc = S390_CPU_GET_CLASS(cpu); + CPUS390XState *env = &cpu->env; + + s390_del_running_cpu(cpu); scc->parent_reset(s); @@ -183,8 +214,9 @@ static void s390_cpu_class_init(ObjectClass *oc, void *data) #if !defined(CONFIG_USER_ONLY) scc->load_normal = s390_cpu_load_normal; #endif - cc->reset = s390_cpu_reset; - + scc->cpu_reset = s390_cpu_reset; + scc->initial_cpu_reset = s390_cpu_initial_reset; + cc->reset = s390_cpu_full_reset; cc->do_interrupt = s390_cpu_do_interrupt; cc->dump_state = s390_cpu_dump_state; cc->set_pc = s390_cpu_set_pc; -- cgit v1.1