70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2018, Bin Meng <bmeng.cn@gmail.com>
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*
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* Generic reset driver for x86 processor
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*/
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#include <common.h>
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#include <dm.h>
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#include <sysreset.h>
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#include <asm/io.h>
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#include <asm/processor.h>
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#include <efi_loader.h>
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static __efi_runtime int x86_sysreset_request(struct udevice *dev,
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enum sysreset_t type)
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{
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int value;
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switch (type) {
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case SYSRESET_WARM:
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value = SYS_RST | RST_CPU;
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break;
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case SYSRESET_COLD:
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value = SYS_RST | RST_CPU | FULL_RST;
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break;
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default:
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return -ENOSYS;
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}
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outb(value, IO_PORT_RESET);
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return -EINPROGRESS;
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}
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#ifdef CONFIG_EFI_LOADER
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void __efi_runtime EFIAPI efi_reset_system(
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enum efi_reset_type reset_type,
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efi_status_t reset_status,
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unsigned long data_size, void *reset_data)
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{
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if (reset_type == EFI_RESET_COLD ||
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reset_type == EFI_RESET_PLATFORM_SPECIFIC)
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x86_sysreset_request(NULL, SYSRESET_COLD);
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else if (reset_type == EFI_RESET_WARM)
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x86_sysreset_request(NULL, SYSRESET_WARM);
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/* TODO EFI_RESET_SHUTDOWN */
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while (1) { }
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}
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#endif
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static const struct udevice_id x86_sysreset_ids[] = {
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{ .compatible = "x86,reset" },
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{ }
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};
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static struct sysreset_ops x86_sysreset_ops = {
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.request = x86_sysreset_request,
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};
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U_BOOT_DRIVER(x86_sysreset) = {
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.name = "x86-sysreset",
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.id = UCLASS_SYSRESET,
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.of_match = x86_sysreset_ids,
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.ops = &x86_sysreset_ops,
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};
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