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armv7m: Implement reading and writing of PRIGROUP

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Add a state field for the v7M PRIGROUP register and implent
reading and writing it. The current NVIC doesn't honour
the values written, but the new version will.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
This commit is contained in:
Peter Maydell 2017-02-28 12:08:16 +00:00
parent f797c07507
commit 1004102a77
1 changed files with 8 additions and 6 deletions
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14
hw/intc/armv7m_nvic.c
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@ -24,6 +24,9 @@
typedef struct NVICState {
GICState gic;
ARMCPU *cpu;
uint32_t prigroup;
struct {
uint32_t control;
uint32_t reload;
@ -223,7 +226,7 @@ static uint32_t nvic_readl(NVICState *s, uint32_t offset)
case 0xd08: /* Vector Table Offset. */
return cpu->env.v7m.vecbase;
case 0xd0c: /* Application Interrupt/Reset Control. */
return 0xfa050000;
return 0xfa050000 | (s->prigroup << 8);
case 0xd10: /* System Control. */
/* TODO: Implement SLEEPONEXIT. */
return 0;
@ -362,9 +365,7 @@ static void nvic_writel(NVICState *s, uint32_t offset, uint32_t value)
if (value & 1) {
qemu_log_mask(LOG_UNIMP, "AIRCR system reset unimplemented\n");
}
if (value & 0x700) {
qemu_log_mask(LOG_UNIMP, "PRIGROUP unimplemented\n");
}
s->prigroup = extract32(value, 8, 3);
}
break;
case 0xd10: /* System Control. */
@ -483,13 +484,14 @@ static const MemoryRegionOps nvic_sysreg_ops = {
static const VMStateDescription vmstate_nvic = {
.name = "armv7m_nvic",
.version_id = 1,
.minimum_version_id = 1,
.version_id = 2,
.minimum_version_id = 2,
.fields = (VMStateField[]) {
VMSTATE_UINT32(systick.control, NVICState),
VMSTATE_UINT32(systick.reload, NVICState),
VMSTATE_INT64(systick.tick, NVICState),
VMSTATE_TIMER_PTR(systick.timer, NVICState),
VMSTATE_UINT32(prigroup, NVICState),
VMSTATE_END_OF_LIST()
}
};