blob: 32a515b5662e027357bd3964b7d0ab913a6c0bc3 [file] [log] [blame]
/*
* Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arm_dyn_cfg_helpers.h>
#include <assert.h>
#include <debug.h>
#include <desc_image_load.h>
#include <plat_arm.h>
#include <platform.h>
#include <platform_def.h>
#include <string.h>
#include <tbbr_img_def.h>
#if LOAD_IMAGE_V2
/* Variable to store the address to TB_FW_CONFIG passed from BL1 */
static void *tb_fw_cfg_dtb;
/*
* Helper function to load TB_FW_CONFIG and populate the load information to
* arg0 of BL2 entrypoint info.
*/
void arm_load_tb_fw_config(void)
{
int err;
uintptr_t config_base = 0;
image_desc_t *image_desc;
image_desc_t arm_tb_fw_info = {
.image_id = TB_FW_CONFIG_ID,
SET_STATIC_PARAM_HEAD(image_info, PARAM_IMAGE_BINARY,
VERSION_2, image_info_t, 0),
.image_info.image_base = ARM_TB_FW_CONFIG_BASE,
.image_info.image_max_size = ARM_TB_FW_CONFIG_LIMIT - ARM_TB_FW_CONFIG_BASE,
};
VERBOSE("BL1: Loading TB_FW_CONFIG\n");
err = load_auth_image(TB_FW_CONFIG_ID, &arm_tb_fw_info.image_info);
if (err != 0) {
/* Return if TB_FW_CONFIG is not loaded */
VERBOSE("Failed to load TB_FW_CONFIG\n");
return;
}
config_base = arm_tb_fw_info.image_info.image_base;
/* The BL2 ep_info arg0 is modified to point to TB_FW_CONFIG */
image_desc = bl1_plat_get_image_desc(BL2_IMAGE_ID);
assert(image_desc != NULL);
image_desc->ep_info.args.arg0 = config_base;
INFO("BL1: TB_FW_CONFIG loaded at address = %p\n",
(void *) config_base);
#if TRUSTED_BOARD_BOOT && defined(DYN_DISABLE_AUTH)
int tb_fw_node;
uint32_t disable_auth = 0;
err = arm_dyn_tb_fw_cfg_init((void *)config_base, &tb_fw_node);
if (err < 0) {
WARN("Invalid TB_FW_CONFIG loaded\n");
return;
}
err = arm_dyn_get_disable_auth((void *)config_base, tb_fw_node, &disable_auth);
if (err < 0)
return;
if (disable_auth == 1)
dyn_disable_auth();
#endif
}
/*
* BL2 utility function to set the address of TB_FW_CONFIG passed from BL1.
*/
void arm_bl2_set_tb_cfg_addr(void *dtb)
{
assert(dtb != NULL);
tb_fw_cfg_dtb = dtb;
}
/*
* BL2 utility function to initialize dynamic configuration specified by
* TB_FW_CONFIG. Populate the bl_mem_params_node_t of other FW_CONFIGs if
* specified in TB_FW_CONFIG.
*/
void arm_bl2_dyn_cfg_init(void)
{
int err = 0, tb_fw_node;
unsigned int i;
bl_mem_params_node_t *cfg_mem_params = NULL;
uint64_t image_base;
uint32_t image_size;
const unsigned int config_ids[] = {
HW_CONFIG_ID,
SOC_FW_CONFIG_ID,
NT_FW_CONFIG_ID,
#ifdef SPD_tspd
/* Currently tos_fw_config is only present for TSP */
TOS_FW_CONFIG_ID
#endif
};
if (tb_fw_cfg_dtb == NULL) {
VERBOSE("No TB_FW_CONFIG specified\n");
return;
}
err = arm_dyn_tb_fw_cfg_init((void *)tb_fw_cfg_dtb, &tb_fw_node);
if (err < 0) {
ERROR("Invalid TB_FW_CONFIG passed from BL1\n");
panic();
}
/* Iterate through all the fw config IDs */
for (i = 0; i < ARRAY_SIZE(config_ids); i++) {
/* Get the config load address and size from TB_FW_CONFIG */
cfg_mem_params = get_bl_mem_params_node(config_ids[i]);
if (cfg_mem_params == NULL) {
VERBOSE("Couldn't find HW_CONFIG in bl_mem_params_node\n");
continue;
}
err = arm_dyn_get_config_load_info((void *)tb_fw_cfg_dtb, tb_fw_node,
config_ids[i], &image_base, &image_size);
if (err < 0) {
VERBOSE("Couldn't find config_id %d load info in TB_FW_CONFIG\n",
config_ids[i]);
continue;
}
/*
* Do some runtime checks on the load addresses of soc_fw_config,
* tos_fw_config, nt_fw_config. This is not a comprehensive check
* of all invalid addresses but to prevent trivial porting errors.
*/
if (config_ids[i] != HW_CONFIG_ID) {
if (check_uptr_overflow(image_base, image_size) != 0)
continue;
/* Ensure the configs don't overlap with BL31 */
if ((image_base > BL31_BASE) || ((image_base + image_size) > BL31_BASE))
continue;
/* Ensure the configs are loaded in a valid address */
if (image_base < ARM_BL_RAM_BASE)
continue;
#ifdef BL32_BASE
/*
* If BL32 is present, ensure that the configs don't
* overlap with it.
*/
if (image_base >= BL32_BASE && image_base <= BL32_LIMIT)
continue;
#endif
}
cfg_mem_params->image_info.image_base = (uintptr_t)image_base;
cfg_mem_params->image_info.image_max_size = image_size;
/* Remove the IMAGE_ATTRIB_SKIP_LOADING attribute from HW_CONFIG node */
cfg_mem_params->image_info.h.attr &= ~IMAGE_ATTRIB_SKIP_LOADING;
}
#if TRUSTED_BOARD_BOOT && defined(DYN_DISABLE_AUTH)
uint32_t disable_auth = 0;
err = arm_dyn_get_disable_auth((void *)tb_fw_cfg_dtb, tb_fw_node,
&disable_auth);
if (err < 0)
return;
if (disable_auth == 1)
dyn_disable_auth();
#endif
}
#endif /* LOAD_IMAGE_V2 */