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14d095c344
Using the Fconf, register base address of the various nv-counters (currently, trusted, non-trusted nv-counters) are moved to the device tree and retrieved during run-time. This feature is enabled using the build option COT_DESC_IN_DTB. Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com> Change-Id: I236f532e63cea63b179f60892cb406fc05cd5830
63 lines
1.5 KiB
C
63 lines
1.5 KiB
C
/*
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* Copyright (c) 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/debug.h>
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#include <common/fdt_wrappers.h>
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#include <libfdt.h>
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#include <plat/arm/common/fconf_nv_cntr_getter.h>
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/*******************************************************************************
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* fconf_populate_cot_descs() - Populate available nv-counters and update global
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* structure.
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* @config[in]: Pointer to the device tree blob in memory
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*
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* Return 0 on success or an error value otherwise.
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******************************************************************************/
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static int fconf_populate_nv_cntrs(uintptr_t config)
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{
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int rc, node, child;
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uint32_t id;
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uintptr_t reg;
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/* As libfdt uses void *, we can't avoid this cast */
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const void *dtb = (void *)config;
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const char *compatible_str = "arm, non-volatile-counter";
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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 node\n",
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compatible_str);
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return node;
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}
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fdt_for_each_subnode(child, dtb, node) {
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rc = fdt_read_uint32(dtb, child, "id", &id);
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if (rc < 0) {
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ERROR("FCONF: Can't find %s property in node\n", "id");
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return rc;
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}
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assert(id < MAX_NV_CTR_IDS);
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rc = fdt_get_reg_props_by_index(dtb, child, 0, ®, NULL);
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if (rc < 0) {
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ERROR("FCONF: Can't find %s property in node\n", "reg");
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return rc;
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}
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nv_cntr_base_addr[id] = reg;
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}
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return 0;
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}
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FCONF_REGISTER_POPULATOR(TB_FW, nv_cntrs, fconf_populate_nv_cntrs);
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