78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
/*
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* Copyright (c) 2019-2020, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <assert.h>
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#include <common/bl_common.h>
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#include <common/debug.h>
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#include <common/fdt_wrappers.h>
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#include <lib/fconf/fconf_tbbr_getter.h>
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#include <libfdt.h>
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struct tbbr_dyn_config_t tbbr_dyn_config;
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int fconf_populate_tbbr_dyn_config(uintptr_t config)
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{
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int err;
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int node;
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uint64_t val64;
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uint32_t val32;
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/* As libfdt use void *, we can't avoid this cast */
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const void *dtb = (void *)config;
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/* Assert the node offset point to "arm,tb_fw" compatible property */
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const char *compatible_str = "arm,tb_fw";
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node = fdt_node_offset_by_compatible(dtb, -1, compatible_str);
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if (node < 0) {
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ERROR("FCONF: Can't find %s compatible in dtb\n", compatible_str);
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return node;
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}
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/* Locate the disable_auth cell and read the value */
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err = fdt_read_uint32(dtb, node, "disable_auth", &tbbr_dyn_config.disable_auth);
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if (err < 0) {
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WARN("FCONF: Read cell failed for `disable_auth`\n");
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return err;
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}
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/* Check if the value is boolean */
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if ((tbbr_dyn_config.disable_auth != 0U) && (tbbr_dyn_config.disable_auth != 1U)) {
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WARN("Invalid value for `disable_auth` cell %d\n", tbbr_dyn_config.disable_auth);
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return -1;
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}
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#if defined(DYN_DISABLE_AUTH)
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if (tbbr_dyn_config.disable_auth == 1)
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dyn_disable_auth();
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#endif
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/* Retrieve the Mbed TLS heap details from the DTB */
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err = fdt_read_uint64(dtb, node, "mbedtls_heap_addr", &val64);
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if (err < 0) {
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ERROR("FCONF: Read cell failed for mbedtls_heap\n");
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return err;
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}
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tbbr_dyn_config.mbedtls_heap_addr = (void *)(uintptr_t)val64;
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err = fdt_read_uint32(dtb, node, "mbedtls_heap_size", &val32);
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if (err < 0) {
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ERROR("FCONF: Read cell failed for mbedtls_heap\n");
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return err;
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}
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tbbr_dyn_config.mbedtls_heap_size = val32;
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VERBOSE("FCONF:tbbr.disable_auth cell found with value = %d\n",
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tbbr_dyn_config.disable_auth);
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VERBOSE("FCONF:tbbr.mbedtls_heap_addr cell found with value = %p\n",
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tbbr_dyn_config.mbedtls_heap_addr);
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VERBOSE("FCONF:tbbr.mbedtls_heap_size cell found with value = %zu\n",
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tbbr_dyn_config.mbedtls_heap_size);
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return 0;
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}
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FCONF_REGISTER_POPULATOR(TB_FW, tbbr, fconf_populate_tbbr_dyn_config);
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