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target-arm: Override do_interrupt for ARMv7-M profile 

Enable ARMCPUInfo to specify a custom class_init functions.
Introduce arm_v7m_class_init() and use it for "cortex-m3" model.

Instead of forwarding from arm_cpu_do_interrupt() to do_interrupt_v7m(),
override CPUClass::do_interrupt with arm_v7m_cpu_do_interrupt()
in arm_v7m_class_init().

Acked-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Andreas Färber 2013-02-02 12:33:14 +01:00
parent 97a8ea5a3a
commit e6f010cc27
3 changed files with 19 additions and 6 deletions
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1
target-arm/cpu-qom.h
View File

@ -114,5 +114,6 @@ static inline ARMCPU *arm_env_get_cpu(CPUARMState *env)
void register_cp_regs_for_features(ARMCPU *cpu);
void arm_cpu_do_interrupt(CPUState *cpu);
void arm_v7m_cpu_do_interrupt(CPUState *cpu);
#endif

14
target-arm/cpu.c
View File

@ -412,6 +412,15 @@ static void cortex_m3_initfn(Object *obj)
cpu->midr = 0x410fc231;
}
static void arm_v7m_class_init(ObjectClass *oc, void *data)
{
#ifndef CONFIG_USER_ONLY
CPUClass *cc = CPU_CLASS(oc);
cc->do_interrupt = arm_v7m_cpu_do_interrupt;
#endif
}
static const ARMCPRegInfo cortexa8_cp_reginfo[] = {
{ .name = "L2LOCKDOWN", .cp = 15, .crn = 9, .crm = 0, .opc1 = 1, .opc2 = 0,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0 },
@ -752,6 +761,7 @@ static void arm_any_initfn(Object *obj)
typedef struct ARMCPUInfo {
const char *name;
void (*initfn)(Object *obj);
void (*class_init)(ObjectClass *oc, void *data);
} ARMCPUInfo;
static const ARMCPUInfo arm_cpus[] = {
@ -766,7 +776,8 @@ static const ARMCPUInfo arm_cpus[] = {
{ .name = "arm1136", .initfn = arm1136_initfn },
{ .name = "arm1176", .initfn = arm1176_initfn },
{ .name = "arm11mpcore", .initfn = arm11mpcore_initfn },
{ .name = "cortex-m3", .initfn = cortex_m3_initfn },
{ .name = "cortex-m3", .initfn = cortex_m3_initfn,
.class_init = arm_v7m_class_init },
{ .name = "cortex-a8", .initfn = cortex_a8_initfn },
{ .name = "cortex-a9", .initfn = cortex_a9_initfn },
{ .name = "cortex-a15", .initfn = cortex_a15_initfn },
@ -812,6 +823,7 @@ static void cpu_register(const ARMCPUInfo *info)
.instance_size = sizeof(ARMCPU),
.instance_init = info->initfn,
.class_size = sizeof(ARMCPUClass),
.class_init = info->class_init,
};
type_info.name = g_strdup_printf("%s-" TYPE_ARM_CPU, info->name);

10
target-arm/helper.c
View File

@ -1725,8 +1725,10 @@ static void do_v7m_exception_exit(CPUARMState *env)
pointer. */
}
static void do_interrupt_v7m(CPUARMState *env)
void arm_v7m_cpu_do_interrupt(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
CPUARMState *env = &cpu->env;
uint32_t xpsr = xpsr_read(env);
uint32_t lr;
uint32_t addr;
@ -1811,10 +1813,8 @@ void arm_cpu_do_interrupt(CPUState *cs)
int new_mode;
uint32_t offset;
if (IS_M(env)) {
do_interrupt_v7m(env);
return;
}
assert(!IS_M(env));
/* TODO: Vectored interrupt controller. */
switch (env->exception_index) {
case EXCP_UDEF: