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hw/loongarch: Add LoongArch virt power manager support. 

This is a placeholder for missing ACPI, and will eventually be replaced.

Signed-off-by: Xiaojuan Yang <yangxiaojuan@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20220606124333.2060567-41-yangxiaojuan@loongson.cn>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Xiaojuan Yang 2022-06-06 20:43:30 +08:00 committed by Richard Henderson
parent 6a6f26f481
commit 9e6602d657
1 changed files with 48 additions and 1 deletions
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49
hw/loongarch/loongson3.c
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@ -31,6 +31,48 @@
#include "target/loongarch/cpu.h"
#define PM_BASE 0x10080000
#define PM_SIZE 0x100
#define PM_CTRL 0x10
/*
* This is a placeholder for missing ACPI,
* and will eventually be replaced.
*/
static uint64_t loongarch_virt_pm_read(void *opaque, hwaddr addr, unsigned size)
{
return 0;
}
static void loongarch_virt_pm_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
if (addr != PM_CTRL) {
return;
}
switch (val) {
case 0x00:
qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
return;
case 0xff:
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
return;
default:
return;
}
}
static const MemoryRegionOps loongarch_virt_pm_ops = {
.read = loongarch_virt_pm_read,
.write = loongarch_virt_pm_write,
.endianness = DEVICE_NATIVE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 1
}
};
static struct _loaderparams {
uint64_t ram_size;
const char *kernel_filename;
@ -67,7 +109,7 @@ static void loongarch_devices_init(DeviceState *pch_pic)
SysBusDevice *d;
PCIBus *pci_bus;
MemoryRegion *ecam_alias, *ecam_reg, *pio_alias, *pio_reg;
MemoryRegion *mmio_alias, *mmio_reg;
MemoryRegion *mmio_alias, *mmio_reg, *pm_mem;
int i;
gpex_dev = qdev_new(TYPE_GPEX_HOST);
@ -132,6 +174,11 @@ static void loongarch_devices_init(DeviceState *pch_pic)
sysbus_create_simple("ls7a_rtc", LS7A_RTC_REG_BASE,
qdev_get_gpio_in(pch_pic,
LS7A_RTC_IRQ - PCH_PIC_IRQ_OFFSET));
pm_mem = g_new(MemoryRegion, 1);
memory_region_init_io(pm_mem, NULL, &loongarch_virt_pm_ops,
NULL, "loongarch_virt_pm", PM_SIZE);
memory_region_add_subregion(get_system_memory(), PM_BASE, pm_mem);
}
static void loongarch_irq_init(LoongArchMachineState *lams)