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49 lines
924 B
49 lines
924 B
// SPDX-License-Identifier: GPL-2.0+ |
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/* |
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* Copyright (C) 2018, Bin Meng <[email protected]> |
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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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static int x86_sysreset_request(struct udevice *dev, 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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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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.flags = DM_FLAG_PRE_RELOC, |
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};
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