src/cpu/intel/haswell/romstage.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright (C) 2012 ChromeOS Authors
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include <stdint.h>
#include <cbmem.h>
#include <console/console.h>

/* Mainboard needs to supply this symbol. */
extern void romstage_main(unsigned long bist);

void main(unsigned long bist)
{
	int i;
	const int num_guards = 4;
	const u32 stack_guard = 0xdeadbeef;
	u32 *stack_base = (void *)(CONFIG_DCACHE_RAM_BASE +
	                           CONFIG_DCACHE_RAM_SIZE -
	                           CONFIG_DCACHE_RAM_ROMSTAGE_STACK_SIZE);

	printk(BIOS_DEBUG, "Setting up stack guards.\n");
	for (i = 0; i < num_guards; i++)
		stack_base[i] = stack_guard;

	romstage_main(bist);

	/* Check the stack. */
	for (i = 0; i < num_guards; i++) {
		if (stack_base[i] == stack_guard)
			continue;
		printk(BIOS_DEBUG, "Smashed stack detected in romstage!\n");
	}

#if CONFIG_CONSOLE_CBMEM
	/* Keep this the last thing this function does. */
	cbmemc_reinit();
#endif
}