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/*
* Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch.h>
#include <arch_helpers.h>
#include <assert.h>
#include <auth_mod.h>
#include <bl_common.h>
#include <debug.h>
#include <errno.h>
#include <platform.h>
#include <platform_def.h>
#include <stdint.h>
/*
* Check for platforms that use obsolete image terminology
*/
#ifdef BL30_BASE
# error "BL30_BASE platform define no longer used - please use SCP_BL2_BASE"
#endif
/*******************************************************************************
* Load the SCP_BL2 image if there's one.
* If a platform does not want to attempt to load SCP_BL2 image it must leave
* SCP_BL2_BASE undefined.
* Return 0 on success or if there's no SCP_BL2 image to load, a negative error
* code otherwise.
******************************************************************************/
static int load_scp_bl2(void)
{
int e = 0;
#ifdef SCP_BL2_BASE
meminfo_t scp_bl2_mem_info;
image_info_t scp_bl2_image_info;
/*
* It is up to the platform to specify where SCP_BL2 should be loaded if
* it exists. It could create space in the secure sram or point to a
* completely different memory.
*
* The entry point information is not relevant in this case as the AP
* won't execute the SCP_BL2 image.
*/
INFO("BL2: Loading SCP_BL2\n");
bl2_plat_get_scp_bl2_meminfo(&scp_bl2_mem_info);
scp_bl2_image_info.h.version = VERSION_1;
e = load_auth_image(&scp_bl2_mem_info,
SCP_BL2_IMAGE_ID,
SCP_BL2_BASE,
&scp_bl2_image_info,
NULL);
if (e == 0) {
/* The subsequent handling of SCP_BL2 is platform specific */
e = bl2_plat_handle_scp_bl2(&scp_bl2_image_info);
if (e) {
ERROR("Failure in platform-specific handling of SCP_BL2 image.\n");
}
}
#endif /* SCP_BL2_BASE */
return e;
}
#ifndef EL3_PAYLOAD_BASE
/*******************************************************************************
* Load the BL31 image.
* The bl2_to_bl31_params and bl31_ep_info params will be updated with the
* relevant BL31 information.
* Return 0 on success, a negative error code otherwise.
******************************************************************************/
static int load_bl31(bl31_params_t *bl2_to_bl31_params,
entry_point_info_t *bl31_ep_info)
{
meminfo_t *bl2_tzram_layout;
int e;
INFO("BL2: Loading BL31\n");
assert(bl2_to_bl31_params != NULL);
assert(bl31_ep_info != NULL);
/* Find out how much free trusted ram remains after BL2 load */
bl2_tzram_layout = bl2_plat_sec_mem_layout();
/* Set the X0 parameter to BL31 */
bl31_ep_info->args.arg0 = (unsigned long)bl2_to_bl31_params;
/* Load the BL31 image */
e = load_auth_image(bl2_tzram_layout,
BL31_IMAGE_ID,
BL31_BASE,
bl2_to_bl31_params->bl31_image_info,
bl31_ep_info);
if (e == 0) {
bl2_plat_set_bl31_ep_info(bl2_to_bl31_params->bl31_image_info,
bl31_ep_info);
}
return e;
}
/*******************************************************************************
* Load the BL32 image if there's one.
* The bl2_to_bl31_params param will be updated with the relevant BL32
* information.
* If a platform does not want to attempt to load BL32 image it must leave
* BL32_BASE undefined.
* Return 0 on success or if there's no BL32 image to load, a negative error
* code otherwise.
******************************************************************************/
static int load_bl32(bl31_params_t *bl2_to_bl31_params)
{
int e = 0;
#ifdef BL32_BASE
meminfo_t bl32_mem_info;
INFO("BL2: Loading BL32\n");
assert(bl2_to_bl31_params != NULL);
/*
* It is up to the platform to specify where BL32 should be loaded if
* it exists. It could create space in the secure sram or point to a
* completely different memory.
*/
bl2_plat_get_bl32_meminfo(&bl32_mem_info);
e = load_auth_image(&bl32_mem_info,
BL32_IMAGE_ID,
BL32_BASE,
bl2_to_bl31_params->bl32_image_info,
bl2_to_bl31_params->bl32_ep_info);
if (e == 0) {
bl2_plat_set_bl32_ep_info(
bl2_to_bl31_params->bl32_image_info,
bl2_to_bl31_params->bl32_ep_info);
}
#endif /* BL32_BASE */
return e;
}
#ifndef PRELOADED_BL33_BASE
/*******************************************************************************
* Load the BL33 image.
* The bl2_to_bl31_params param will be updated with the relevant BL33
* information.
* Return 0 on success, a negative error code otherwise.
******************************************************************************/
static int load_bl33(bl31_params_t *bl2_to_bl31_params)
{
meminfo_t bl33_mem_info;
int e;
INFO("BL2: Loading BL33\n");
assert(bl2_to_bl31_params != NULL);
bl2_plat_get_bl33_meminfo(&bl33_mem_info);
/* Load the BL33 image in non-secure memory provided by the platform */
e = load_auth_image(&bl33_mem_info,
BL33_IMAGE_ID,
plat_get_ns_image_entrypoint(),
bl2_to_bl31_params->bl33_image_info,
bl2_to_bl31_params->bl33_ep_info);
if (e == 0) {
bl2_plat_set_bl33_ep_info(bl2_to_bl31_params->bl33_image_info,
bl2_to_bl31_params->bl33_ep_info);
}
return e;
}
#endif /* PRELOADED_BL33_BASE */
#endif /* EL3_PAYLOAD_BASE */
/*******************************************************************************
* This function loads SCP_BL2/BL3x images and returns the ep_info for
* the next executable image.
******************************************************************************/
entry_point_info_t *bl2_load_images(void)
{
bl31_params_t *bl2_to_bl31_params;
entry_point_info_t *bl31_ep_info;
int e;
e = load_scp_bl2();
if (e) {
ERROR("Failed to load SCP_BL2 (%i)\n", e);
plat_error_handler(e);
}
/* Perform platform setup in BL2 after loading SCP_BL2 */
bl2_platform_setup();
/*
* Get a pointer to the memory the platform has set aside to pass
* information to BL31.
*/
bl2_to_bl31_params = bl2_plat_get_bl31_params();
bl31_ep_info = bl2_plat_get_bl31_ep_info();
#ifdef EL3_PAYLOAD_BASE
/*
* In the case of an EL3 payload, we don't need to load any further
* images. Just update the BL31 entrypoint info structure to make BL1
* jump to the EL3 payload.
* The pointer to the memory the platform has set aside to pass
* information to BL31 in the normal boot flow is reused here, even
* though only a fraction of the information contained in the
* bl31_params_t structure makes sense in the context of EL3 payloads.
* This will be refined in the future.
*/
INFO("BL2: Populating the entrypoint info for the EL3 payload\n");
bl31_ep_info->pc = EL3_PAYLOAD_BASE;
bl31_ep_info->args.arg0 = (unsigned long) bl2_to_bl31_params;
bl2_plat_set_bl31_ep_info(NULL, bl31_ep_info);
#else
e = load_bl31(bl2_to_bl31_params, bl31_ep_info);
if (e) {
ERROR("Failed to load BL31 (%i)\n", e);
plat_error_handler(e);
}
e = load_bl32(bl2_to_bl31_params);
if (e) {
if (e == -EAUTH) {
ERROR("Failed to authenticate BL32\n");
plat_error_handler(e);
} else {
WARN("Failed to load BL32 (%i)\n", e);
}
}
#ifdef PRELOADED_BL33_BASE
/*
* In this case, don't load the BL33 image as it's already loaded in
* memory. Update BL33 entrypoint information.
*/
INFO("BL2: Populating the entrypoint info for the preloaded BL33\n");
bl2_to_bl31_params->bl33_ep_info->pc = PRELOADED_BL33_BASE;
bl2_plat_set_bl33_ep_info(NULL, bl2_to_bl31_params->bl33_ep_info);
#else
e = load_bl33(bl2_to_bl31_params);
if (e) {
ERROR("Failed to load BL33 (%i)\n", e);
plat_error_handler(e);
}
#endif /* PRELOADED_BL33_BASE */
#endif /* EL3_PAYLOAD_BASE */
/* Flush the params to be passed to memory */
bl2_plat_flush_bl31_params();
return bl31_ep_info;
}
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