diff options
| -rw-r--r-- | hw/loongarch/loongson3.c | 49 |
1 files changed, 48 insertions, 1 deletions
diff --git a/hw/loongarch/loongson3.c b/hw/loongarch/loongson3.c index 3c8fcb828c..bd20ebbb78 100644 --- a/hw/loongarch/loongson3.c +++ b/hw/loongarch/loongson3.c @@ -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) |