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authorChristian Borntraeger <borntraeger@de.ibm.com>2013-06-28 10:51:09 +0200
committerChristian Borntraeger <borntraeger@de.ibm.com>2013-08-30 14:16:43 +0200
commitf5ae2a4fd8d573cfebaf24220e2920bb5074d9a6 (patch)
tree48f8acae8b99e3f527bf5c0508ca9304920e19a7 /target-s390x
parent29c6157ca7bfa036a8c59805c1a1d76ba9a2a851 (diff)
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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 <borntraeger@de.ibm.com>
Diffstat (limited to 'target-s390x')
-rw-r--r--target-s390x/cpu-qom.h4
-rw-r--r--target-s390x/cpu.c38
2 files changed, 39 insertions, 3 deletions
diff --git a/target-s390x/cpu-qom.h b/target-s390x/cpu-qom.h
index 2dc1750..ac0460e 100644
--- a/target-s390x/cpu-qom.h
+++ b/target-s390x/cpu-qom.h
@@ -37,6 +37,8 @@
* @parent_realize: The parent class' realize handler.
* @parent_reset: The parent class' reset handler.
* @load_normal: Performs a load normal.
+ * @cpu_reset: Performs a CPU reset.
+ * @initial_cpu_reset: Performs an initial CPU reset.
*
* An S/390 CPU model.
*/
@@ -48,6 +50,8 @@ typedef struct S390CPUClass {
DeviceRealize parent_realize;
void (*parent_reset)(CPUState *cpu);
void (*load_normal)(CPUState *cpu);
+ void (*cpu_reset)(CPUState *cpu);
+ void (*initial_cpu_reset)(CPUState *cpu);
} S390CPUClass;
/**
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;