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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2015 Google Inc.
* Copyright (C) 2015 Intel Corp.
*
* 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 <bootmode.h>
#include <cbfs.h>
#include <console/console.h>
#include <fsp/ramstage.h>
#include <fsp/util.h>
/* Reading VBT table from flash */
const optionrom_vbt_t *fsp_get_vbt(uint32_t *vbt_len)
{
size_t vbt_size;
union {
const optionrom_vbt_t *data;
uint32_t *signature;
} vbt;
/* Locate the vbt file in cbfs */
vbt.data = cbfs_boot_map_with_leak("vbt.bin", CBFS_TYPE_RAW, &vbt_size);
if (!vbt.data) {
printk(BIOS_INFO,
"FSP_INFO: VBT data file (vbt.bin) not found in CBFS");
return NULL;
}
/* Validate the vbt file */
if (*vbt.signature != VBT_SIGNATURE) {
printk(BIOS_WARNING,
"FSP_WARNING: Invalid signature in VBT data file (vbt.bin)!\n");
return NULL;
}
*vbt_len = vbt_size;
printk(BIOS_DEBUG, "FSP_INFO: VBT found at %p, 0x%08x bytes\n",
vbt.data, *vbt_len);
#if IS_ENABLED(CONFIG_DISPLAY_VBT)
/* Display the vbt file contents */
printk(BIOS_DEBUG, "VBT Data:\n");
hexdump(vbt.data, *vbt_len);
printk(BIOS_DEBUG, "\n");
#endif
/* Return the pointer to the vbt file data */
return vbt.data;
}
/* Locate VBT and pass it to FSP GOP */
void load_vbt(uint8_t s3_resume, SILICON_INIT_UPD *params)
{
const optionrom_vbt_t *vbt_data = NULL;
uint32_t vbt_len;
/* Check boot mode - for S3 resume path VBT loading is not needed */
if (s3_resume) {
printk(BIOS_DEBUG, "S3 resume do not pass VBT to GOP\n");
} else if (display_init_required()) {
/* Get VBT data */
vbt_data = fsp_get_vbt(&vbt_len);
if (vbt_data != NULL)
printk(BIOS_DEBUG, "Passing VBT to GOP\n");
else
printk(BIOS_DEBUG, "VBT not found!\n");
} else {
printk(BIOS_DEBUG, "Not passing VBT to GOP\n");
}
params->GraphicsConfigPtr = (u32)vbt_data;
}
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