src/southbridge/intel/fsp_rangeley/romstage.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2013 Google Inc.
 * Copyright (C) 2013-2014 Sage Electronic Engineering, LLC.
 *
 * 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 <lib.h>
#include <timestamp.h>
#include <arch/io.h>
#include <device/mmio.h>
#include <device/pci_ops.h>
#include <device/pci_def.h>
#include <cpu/x86/lapic.h>
#include <cbmem.h>
#include <console/console.h>
#include <console/usb.h>
#include <drivers/intel/fsp1_0/fsp_util.h>
#include <program_loading.h>
#include <northbridge/intel/fsp_rangeley/northbridge.h>
#include "southbridge/intel/fsp_rangeley/soc.h"
#include "southbridge/intel/fsp_rangeley/gpio.h"
#include "southbridge/intel/fsp_rangeley/romstage.h"
#include <cpu/x86/msr.h>
#include "gpio.h"

void main(FSP_INFO_HEADER *fsp_info_header)
{
	uint32_t fd_mask = 0;
	uint32_t *func_dis = (uint32_t *)(DEFAULT_PBASE + PBASE_FUNC_DIS);

	/*
	 * Do not use the Serial Console before it is setup.
	 * This causes the I/O to clog and a side effect is
	 * that the reset button stops functioning.  So
	 * instead just use outb so it doesn't output to the
	 * console when CONFIG_CONSOLE_POST.
	 */
	outb(0x40, 0x80);

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

	/* Rangeley UART POR state is enabled */
	console_init();
	post_code(0x41);

	/* Enable GPIOs BAR */
	pci_write_config32(SOC_LPC_DEV, GBASE, DEFAULT_GPIOBASE|0x02);

	early_mainboard_romstage_entry();

	post_code(0x42);
	rangeley_sb_early_initialization();

	post_code(0x46);
	/* Program any required function disables */
	get_func_disables(&fd_mask);

	if (fd_mask != 0) {
		write32(func_dis, read32(func_dis) | fd_mask);
		/* Ensure posted write hits. */
		read32(func_dis);
	}

	timestamp_add_now(TS_BEFORE_INITRAM);

  /*
   * Call early init to initialize memory and chipset. This function returns
   * to the romstage_main_continue function with a pointer to the HOB
   * structure.
   */
	post_code(0x47);
	printk(BIOS_DEBUG, "Starting the Intel FSP (early_init)\n");
	fsp_early_init(fsp_info_header);
	die("Uh Oh! fsp_early_init should not return here.\n");
}

/*******************************************************************************
 * The FSP early_init function returns to this function.
 * Memory is setup and the stack is set by the FSP.
 */
void romstage_main_continue(EFI_STATUS status, void *hob_list_ptr) {
	int cbmem_was_initted;
	void *cbmem_hob_ptr;

	timestamp_add_now(TS_AFTER_INITRAM);

	post_code(0x48);
	printk(BIOS_DEBUG, "%s status: %x  hob_list_ptr: %x\n",
		__func__, (u32) status, (u32) hob_list_ptr);

	/* FSP reconfigures USB, so reinit it to have debug */
	if (IS_ENABLED(CONFIG_USBDEBUG_IN_PRE_RAM))
		usbdebug_hw_init(true);

	printk(BIOS_DEBUG, "FSP Status: 0x%0x\n", (u32)status);

	post_code(0x4b);
	late_mainboard_romstage_entry();

	post_code(0x4c);

	/* Decode E0000 and F0000 segment to DRAM */
	sideband_write(B_UNIT, BMISC, sideband_read(B_UNIT, BMISC) | (1 << 1) | (1 << 0));

	quick_ram_check();
	post_code(0x4d);

	cbmem_was_initted = !cbmem_recovery(0);

	/* Save the HOB pointer in CBMEM to be used in ramstage*/
	cbmem_hob_ptr = cbmem_add(CBMEM_ID_HOB_POINTER, sizeof(*hob_list_ptr));
	if (cbmem_hob_ptr == NULL)
		die("Could not allocate cbmem for HOB pointer");
	*(u32*)cbmem_hob_ptr = (u32)hob_list_ptr;
	post_code(0x4e);

	post_code(0x4f);

	/* Load the ramstage. */
	run_ramstage();
	while (1);
}

uint64_t get_initial_timestamp(void)
{
	return 0;
}