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/*
* This file is part of the coreboot project.
*
* Copyright 2015 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.
*
* 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.
*/
#include <arch/cache.h>
#include <arm_tf.h>
#include <assert.h>
#include <cbfs.h>
#include <cbmem.h>
#include <vendorcode/google/chromeos/vboot_handoff.h>
/*
* TODO: Many of these structures are currently unused. Better not fill them out
* to make future changes fail fast, rather than try to come up with content
* that might turn out to not make sense. Implement later as required.
*
static image_info_t bl31_image_info;
static image_info_t bl32_image_info;
static image_info_t bl33_image_info;
static entry_point_info_t bl32_ep_info;
*/
static entry_point_info_t bl33_ep_info;
static bl31_params_t bl31_params;
/* TODO: Replace with glorious new CBFSv1 solution when it's available. */
static void *vboot_get_bl31(void)
{
void *bl31_entry;
struct cbfs_media *media;
struct firmware_component *component;
struct vboot_handoff *handoff = cbmem_find(CBMEM_ID_VBOOT_HANDOFF);
if (!handoff)
return NULL;
assert(CONFIG_VBOOT_BL31_INDEX < MAX_PARSED_FW_COMPONENTS);
component = &handoff->components[CONFIG_VBOOT_BL31_INDEX];
/* components[] is zeroed out before filling, so size == 0 -> missing */
if (!component->size)
return NULL;
init_default_cbfs_media(media);
bl31_entry = cbfs_load_stage_by_offset(media, component->address);
if (bl31_entry == CBFS_LOAD_ERROR)
return NULL;
printk(BIOS_INFO, "Loaded %u bytes verified BL31 from %#.8x to EP %p\n",
component->size, component->address, bl31_entry);
return bl31_entry;
}
void __attribute__((weak)) *soc_get_bl31_plat_params(bl31_params_t *params)
{
/* Default weak implementation. */
return NULL;
}
void arm_tf_run_bl31(u64 payload_entry, u64 payload_arg0, u64 payload_spsr)
{
const char *bl31_filename = CONFIG_CBFS_PREFIX"/bl31";
void (*bl31_entry)(bl31_params_t *params, void *plat_params) = NULL;
if (IS_ENABLED(CONFIG_VBOOT2_VERIFY_FIRMWARE))
bl31_entry = vboot_get_bl31();
if (!bl31_entry) {
bl31_entry = cbfs_load_stage(CBFS_DEFAULT_MEDIA, bl31_filename);
if (bl31_entry == CBFS_LOAD_ERROR)
die("BL31 not found in CBFS");
}
SET_PARAM_HEAD(&bl31_params, PARAM_BL31, VERSION_1, 0);
bl31_params.bl33_ep_info = &bl33_ep_info;
SET_PARAM_HEAD(&bl33_ep_info, PARAM_EP, VERSION_1, PARAM_EP_NON_SECURE);
bl33_ep_info.pc = payload_entry;
bl33_ep_info.spsr = payload_spsr;
bl33_ep_info.args.arg0 = payload_arg0;
/* May update bl31_params if necessary. Must flush all added structs. */
void *bl31_plat_params = soc_get_bl31_plat_params(&bl31_params);
dcache_clean_by_mva(&bl31_params, sizeof(bl31_params));
dcache_clean_by_mva(&bl33_ep_info, sizeof(bl33_ep_info));
dcache_mmu_disable();
bl31_entry(&bl31_params, bl31_plat_params);
die("BL31 returned!");
}
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