src/northbridge/intel/sandybridge/romstage.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2007-2010 coresystems GmbH
 * Copyright (C) 2011 The ChromiumOS Authors.  All rights reserved.
 * Copyright (C) 2014 Vladimir Serbinenko
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <stdint.h>
#include <string.h>
#include <console/console.h>
#include <arch/io.h>
#include <lib.h>
#include <cpu/x86/lapic.h>
#include <timestamp.h>
#include "sandybridge.h"
#include <cpu/x86/bist.h>
#include <cpu/intel/romstage.h>
#include <device/pci_def.h>
#include <device/device.h>
#include <halt.h>
#include <tpm.h>
#include "raminit_native.h"
#include <northbridge/intel/sandybridge/chip.h>
#include "southbridge/intel/bd82x6x/pch.h"
#include "southbridge/intel/bd82x6x/gpio.h"

#define HOST_BRIDGE	PCI_DEVFN(0, 0)
#define DEFAULT_TCK	TCK_800MHZ

static unsigned int get_mem_min_tck(void)
{
	const struct device *dev;
	const struct northbridge_intel_sandybridge_config *cfg;

	dev = dev_find_slot(0, HOST_BRIDGE);
	if (!(dev && dev->chip_info))
		return DEFAULT_TCK;

	cfg = dev->chip_info;

	/* If this is zero, it just means devicetree.cb didn't set it */
	if (cfg->max_mem_clock_mhz == 0)
		return DEFAULT_TCK;

	if (cfg->max_mem_clock_mhz >= 800)
		return TCK_800MHZ;
	else if (cfg->max_mem_clock_mhz >= 666)
		return TCK_666MHZ;
	else if (cfg->max_mem_clock_mhz >= 533)
		return TCK_533MHZ;
	else
		return TCK_400MHZ;
}

void main(unsigned long bist)
{
	int s3resume = 0;
	spd_raw_data spd[4];

	if (MCHBAR16(SSKPD) == 0xCAFE) {
		outb(0x6, 0xcf9);
		halt ();
	}

	timestamp_init(get_initial_timestamp());
	timestamp_add_now(TS_START_ROMSTAGE);

	if (bist == 0)
		enable_lapic();

	pch_enable_lpc();

	/* Enable GPIOs */
	pci_write_config32(PCH_LPC_DEV, GPIO_BASE, DEFAULT_GPIOBASE|1);
	pci_write_config8(PCH_LPC_DEV, GPIO_CNTL, 0x10);

	setup_pch_gpios(&mainboard_gpio_map);

	early_usb_init(mainboard_usb_ports);

	/* Initialize console device(s) */
	console_init();

	/* Halt if there was a built in self test failure */
	report_bist_failure(bist);

	/* Perform some early chipset initialization required
	 * before RAM initialization can work
	 */
	sandybridge_early_initialization(SANDYBRIDGE_MOBILE);
	printk(BIOS_DEBUG, "Back from sandybridge_early_initialization()\n");

	s3resume = southbridge_detect_s3_resume();

	post_code(0x38);

	mainboard_early_init(s3resume);

	/* Enable SPD ROMs and DDR-III DRAM */
	enable_smbus();

	post_code(0x39);

	post_code(0x3a);

	memset (spd, 0, sizeof (spd));
	mainboard_get_spd(spd);

	timestamp_add_now(TS_BEFORE_INITRAM);

	init_dram_ddr3(spd, 1, get_mem_min_tck(), s3resume);

	timestamp_add_now(TS_AFTER_INITRAM);
	post_code(0x3c);

	southbridge_configure_default_intmap();
	rcba_config();
	post_code(0x3d);

	northbridge_romstage_finalize(s3resume);

#if CONFIG_LPC_TPM
       init_tpm(s3resume);
#endif

	post_code(0x3f);
}