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/*
* Copyright (c) 2019-2022, Arm Limited. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <assert.h>
#include <common/bl_common.h>
#include <common/debug.h>
#include <common/fdt_wrappers.h>
#include <lib/fconf/fconf_tbbr_getter.h>
#include <libfdt.h>
struct tbbr_dyn_config_t tbbr_dyn_config;
int fconf_populate_tbbr_dyn_config(uintptr_t config)
{
int err;
int node;
uint64_t val64;
uint32_t val32;
/* As libfdt use void *, we can't avoid this cast */
const void *dtb = (void *)config;
/* Assert the node offset point to "arm,tb_fw" compatible property */
const char *compatible_str = "arm,tb_fw";
node = fdt_node_offset_by_compatible(dtb, -1, compatible_str);
if (node < 0) {
ERROR("FCONF: Can't find `%s` compatible in dtb\n",
compatible_str);
return node;
}
/* Locate the disable_auth cell and read the value */
err = fdt_read_uint32(dtb, node, "disable_auth",
&tbbr_dyn_config.disable_auth);
if (err < 0) {
WARN("FCONF: Read %s failed for `%s`\n",
"cell", "disable_auth");
return err;
}
/* Check if the value is boolean */
if ((tbbr_dyn_config.disable_auth != 0U) &&
(tbbr_dyn_config.disable_auth != 1U)) {
WARN("Invalid value for `%s` cell %u\n",
"disable_auth", tbbr_dyn_config.disable_auth);
return -1;
}
#if defined(DYN_DISABLE_AUTH)
if (tbbr_dyn_config.disable_auth == 1)
dyn_disable_auth();
#endif
/* Retrieve the Mbed TLS heap details from the DTB */
err = fdt_read_uint64(dtb, node, "mbedtls_heap_addr", &val64);
if (err < 0) {
ERROR("FCONF: Read %s failed for `%s`\n",
"cell", "mbedtls_heap_addr");
return err;
}
tbbr_dyn_config.mbedtls_heap_addr = (void *)(uintptr_t)val64;
err = fdt_read_uint32(dtb, node, "mbedtls_heap_size", &val32);
if (err < 0) {
ERROR("FCONF: Read %s failed for `%s`\n",
"cell", "mbedtls_heap_size");
return err;
}
tbbr_dyn_config.mbedtls_heap_size = val32;
VERBOSE("%s%s%s %u\n", "FCONF: `tbbr.", "disable_auth",
"` cell found with value =", tbbr_dyn_config.disable_auth);
VERBOSE("%s%s%s %p\n", "FCONF: `tbbr.", "mbedtls_heap_addr",
"` cell found with value =", tbbr_dyn_config.mbedtls_heap_addr);
VERBOSE("%s%s%s %zu\n", "FCONF: `tbbr.", "mbedtls_heap_size",
"` cell found with value =", tbbr_dyn_config.mbedtls_heap_size);
return 0;
}
FCONF_REGISTER_POPULATOR(TB_FW, tbbr, fconf_populate_tbbr_dyn_config);
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