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[platform][qemu-virt-m68k] implement system reset and power off #494

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Merged
travisg merged 1 commit into from
Jan 29, 2026
Merged

[platform][qemu-virt-m68k] implement system reset and power off #494

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10 changes: 10 additions & 0 deletions platform/qemu-virt-m68k/include/platform/virt.h
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Original file line number Diff line number Diff line change
Expand Up @@ -52,6 +52,16 @@
#define VIRT_CTRL_MMIO_BASE 0xff009000 /* MMIO: 0xff009000 - 0xff009fff */
#define VIRT_CTRL_IRQ_BASE PIC_IRQ(1, 1) /* PIC: #1, IRQ: #1 */

/* virt-ctrl registers */
#define VIRT_CTRL_REG_FEATURES 0x00
#define VIRT_CTRL_REG_CMD 0x04

/* virt-ctrl command codes */
#define VIRT_CTRL_CMD_NOOP 0
#define VIRT_CTRL_CMD_RESET 1
#define VIRT_CTRL_CMD_HALT 2
#define VIRT_CTRL_CMD_PANIC 3

/*
* virtio-mmio size is 0x200 bytes
* we use 4 goldfish-pic to attach them,
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12 changes: 12 additions & 0 deletions platform/qemu-virt-m68k/platform.c
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Original file line number Diff line number Diff line change
Expand Up @@ -132,3 +132,15 @@ void platform_init(void) {
}
#endif
}

static void virt_ctrl_system_reset(void) {
writel(VIRT_CTRL_CMD_RESET, VIRT_CTRL_MMIO_BASE + VIRT_CTRL_REG_CMD);
}

static void virt_ctrl_system_off(void) {
writel(VIRT_CTRL_CMD_HALT, VIRT_CTRL_MMIO_BASE + VIRT_CTRL_REG_CMD);
}

void platform_halt(platform_halt_action action, platform_halt_reason reason) {
platform_halt_default(action, reason, &virt_ctrl_system_reset, &virt_ctrl_system_off);
}