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https://github.com/ARM-software/arm-trusted-firmware.git
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25d740c45e
A populate() function essentially captures the value of a property, defined by a platform, into a fconf related c structure. Such a callback is usually platform specific and is associated to a specific configuration source. For example, a populate() function which captures the hardware topology of the platform can only parse HW_CONFIG DTB. Hence each populator function must be registered with a specific 'config_type' identifier. It broadly represents a logical grouping of configuration properties which is usually a device tree source file. Example: > TB_FW: properties related to trusted firmware such as IO policies, base address of other DTBs, mbedtls heap info etc. > HW_CONFIG: properties related to hardware configuration of the SoC such as topology, GIC controller, PSCI hooks, CPU ID etc. This patch modifies FCONF_REGISTER_POPULATOR macro and fconf_populate() to register and invoke the appropriate callbacks selectively based on configuration type. Change-Id: I6f63b1fd7a8729c6c9137d5b63270af1857bb44a Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
76 lines
2.1 KiB
C
76 lines
2.1 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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/* 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 = fdtw_read_cells(dtb, node, "disable_auth", 1, &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 = fdtw_read_cells(dtb, node,
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"mbedtls_heap_addr", 2, &tbbr_dyn_config.mbedtls_heap_addr);
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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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err = fdtw_read_cells(dtb, node,
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"mbedtls_heap_size", 1, &tbbr_dyn_config.mbedtls_heap_size);
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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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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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