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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2013 Google Inc.
*
* 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 <arch/acpi.h>
#include <cbmem.h>
#include <console/console.h>
#include <console/streams.h>
#include <cpu/x86/tsc.h>
#include <program_loading.h>
#include <rmodule.h>
#include <stage_cache.h>
#include <soc/ramstage.h>
#include <soc/efi_wrapper.h>
static void ABI_X86 send_to_console(unsigned char b)
{
console_tx_byte(b);
}
static efi_wrapper_entry_t load_refcode_from_cache(void)
{
struct prog refcode;
printk(BIOS_DEBUG, "refcode loading from cache.\n");
stage_cache_load_stage(STAGE_REFCODE, &refcode);
return (efi_wrapper_entry_t)prog_entry(&refcode);
}
static efi_wrapper_entry_t load_reference_code(void)
{
struct prog prog =
PROG_INIT(PROG_REFCODE, CONFIG_CBFS_PREFIX "/refcode");
struct rmod_stage_load refcode = {
.cbmem_id = CBMEM_ID_REFCODE,
.prog = &prog,
};
if (acpi_is_wakeup_s3()) {
return load_refcode_from_cache();
}
if (prog_locate(&prog)) {
printk(BIOS_DEBUG, "Couldn't locate reference code.\n");
return NULL;
}
if (rmodule_stage_load(&refcode)) {
printk(BIOS_DEBUG, "Error loading reference code.\n");
return NULL;
}
/* Cache loaded reference code. */
stage_cache_add(STAGE_REFCODE, &prog);
return prog_entry(&prog);
}
void baytrail_run_reference_code(void)
{
int ret;
efi_wrapper_entry_t entry;
struct efi_wrapper_params wrp = {
.version = EFI_WRAPPER_VER,
.console_out = send_to_console,
};
entry = load_reference_code();
if (entry == NULL)
return;
wrp.tsc_ticks_per_microsecond = tsc_freq_mhz();
/* Call into reference code. */
ret = entry(&wrp);
if (ret != 0) {
printk(BIOS_DEBUG, "Reference code returned %d\n", ret);
return;
}
}
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