87 lines
1.7 KiB
C
87 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2011 The Chromium OS Authors.
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* (C) Copyright 2008
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* Graeme Russ, graeme.russ@gmail.com.
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*/
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#include <common.h>
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#include <cpu_func.h>
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#include <fdtdec.h>
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#include <init.h>
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#include <usb.h>
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#include <asm/io.h>
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#include <asm/msr.h>
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#include <asm/mtrr.h>
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#include <asm/arch/sysinfo.h>
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#include <asm/arch/timestamp.h>
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DECLARE_GLOBAL_DATA_PTR;
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int arch_cpu_init(void)
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{
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int ret = get_coreboot_info(&lib_sysinfo);
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if (ret != 0) {
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printf("Failed to parse coreboot tables.\n");
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return ret;
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}
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timestamp_init();
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return IS_ENABLED(CONFIG_X86_RUN_64BIT) ? x86_cpu_reinit_f() :
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x86_cpu_init_f();
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}
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int checkcpu(void)
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{
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return 0;
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}
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int print_cpuinfo(void)
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{
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return default_print_cpuinfo();
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}
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static void board_final_init(void)
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{
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/*
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* Un-cache the ROM so the kernel has one
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* more MTRR available.
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*
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* Coreboot should have assigned this to the
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* top available variable MTRR.
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*/
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u8 top_mtrr = (native_read_msr(MTRR_CAP_MSR) & 0xff) - 1;
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u8 top_type = native_read_msr(MTRR_PHYS_BASE_MSR(top_mtrr)) & 0xff;
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/* Make sure this MTRR is the correct Write-Protected type */
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if (top_type == MTRR_TYPE_WRPROT) {
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struct mtrr_state state;
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mtrr_open(&state, true);
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wrmsrl(MTRR_PHYS_BASE_MSR(top_mtrr), 0);
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wrmsrl(MTRR_PHYS_MASK_MSR(top_mtrr), 0);
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mtrr_close(&state, true);
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}
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if (!fdtdec_get_config_bool(gd->fdt_blob, "u-boot,no-apm-finalize")) {
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/*
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* Issue SMI to coreboot to lock down ME and registers
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* when allowed via device tree
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*/
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printf("Finalizing coreboot\n");
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outb(0xcb, 0xb2);
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}
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}
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int last_stage_init(void)
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{
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/* start usb so that usb keyboard can be used as input device */
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if (CONFIG_IS_ENABLED(USB_KEYBOARD))
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usb_init();
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board_final_init();
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return 0;
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}
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