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hw/intc: ibex_timer: Convert the timer to use RISC-V CPU GPIO lines

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Instead of using riscv_cpu_update_mip() let's instead use the new RISC-V
CPU GPIO lines to set the timer MIP bits.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 84d5b1d5783d2e79eee69a2f7ac480cc0c070db3.1630301632.git.alistair.francis@wdc.com
This commit is contained in:
Alistair Francis 2021-08-30 15:35:15 +10:00
parent f436ecc315
commit 57a3a62265
3 changed files with 17 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

17
hw/timer/ibex_timer.c
View file

@ -77,7 +77,7 @@ static void ibex_timer_update_irqs(IbexTimerState *s)
/*
* If the mtimecmp was in the past raise the interrupt now.
*/
riscv_cpu_update_mip(cpu, MIP_MTIP, BOOL_TO_MASK(1));
qemu_irq_raise(s->m_timer_irq);
if (s->timer_intr_enable & R_INTR_ENABLE_IE_0_MASK) {
s->timer_intr_state |= R_INTR_STATE_IS_0_MASK;
qemu_set_irq(s->irq, true);
@ -86,7 +86,7 @@ static void ibex_timer_update_irqs(IbexTimerState *s)
}
/* Setup a timer to trigger the interrupt in the future */
riscv_cpu_update_mip(cpu, MIP_MTIP, BOOL_TO_MASK(0));
qemu_irq_lower(s->m_timer_irq);
qemu_set_irq(s->irq, false);
diff = cpu->env.timecmp - now;
@ -106,10 +106,8 @@ static void ibex_timer_update_irqs(IbexTimerState *s)
static void ibex_timer_cb(void *opaque)
{
IbexTimerState *s = opaque;
CPUState *cs = qemu_get_cpu(0);
RISCVCPU *cpu = RISCV_CPU(cs);
riscv_cpu_update_mip(cpu, MIP_MTIP, BOOL_TO_MASK(1));
qemu_irq_raise(s->m_timer_irq);
if (s->timer_intr_enable & R_INTR_ENABLE_IE_0_MASK) {
s->timer_intr_state |= R_INTR_STATE_IS_0_MASK;
qemu_set_irq(s->irq, true);
@ -280,12 +278,21 @@ static void ibex_timer_init(Object *obj)
sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
}
static void ibex_timer_realize(DeviceState *dev, Error **errp)
{
IbexTimerState *s = IBEX_TIMER(dev);
qdev_init_gpio_out(dev, &s->m_timer_irq, 1);
}
static void ibex_timer_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->reset = ibex_timer_reset;
dc->vmsd = &vmstate_ibex_timer;
dc->realize = ibex_timer_realize;
device_class_set_props(dc, ibex_timer_properties);
}