@@ -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)