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