src/soc/intel/xeon_sp/romstage.c

/* This file is part of the coreboot project. */
/* SPDX-License-Identifier: GPL-2.0-or-later */

#include <arch/romstage.h>
#include <cbmem.h>
#include <intelblocks/rtc.h>
#include <console/console.h>
#include <cpu/x86/mtrr.h>
#include <fsp/util.h>
#include <soc/romstage.h>
#include <soc/util.h>

asmlinkage void car_stage_entry(void)
{
	struct postcar_frame pcf;
	uintptr_t top_of_ram;

	printk(BIOS_DEBUG, "FSP TempRamInit was successful...\n");

	console_init();
	rtc_init();

	fsp_memory_init(false);
	printk(BIOS_DEBUG, "coreboot fsp_memory_init finished...\n");

	unlock_pam_regions();

	if (postcar_frame_init(&pcf, 1 * KiB))
		die("Unable to initialize postcar frame.\n");

	/*
	 * We need to make sure ramstage will be run cached. At this point exact
	 * location of ramstage in cbmem is not known. Instruct postcar to cache
	 * 16 megs under cbmem top which is a safe bet to cover ramstage.
	 */
	top_of_ram = (uintptr_t)cbmem_top();
	printk(BIOS_DEBUG, "top_of_ram: 0x%lx\n", top_of_ram);
	postcar_frame_add_mtrr(&pcf, top_of_ram - 16 * MiB, 16 * MiB,
		MTRR_TYPE_WRBACK);

	/* Cache the memory-mapped boot media. */
	postcar_frame_add_romcache(&pcf, MTRR_TYPE_WRPROT);

	run_postcar_phase(&pcf);
}

__weak void mainboard_memory_init_params(FSPM_UPD *mupd)
{
	printk(BIOS_SPEW, "WARNING: using default FSP-M parameters!\n");
}