1 files changed, 194 insertions, 0 deletions
diff --git a/plat/common/plat_spmd_manifest.c b/plat/common/plat_spmd_manifest.c
new file mode 100644
index 0000000..5f7d142
--- /dev/null
+++ b/plat/common/plat_spmd_manifest.c
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2020-2023, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <assert.h>
+#include <errno.h>
+#include <inttypes.h>
+#include <libfdt.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <common/bl_common.h>
+#include <common/debug.h>
+#include <common/fdt_wrappers.h>
+#include <lib/xlat_tables/xlat_tables_v2.h>
+#include <platform_def.h>
+#include <services/spm_core_manifest.h>
+
+#define ATTRIBUTE_ROOT_NODE_STR "attribute"
+
+/*******************************************************************************
+ * SPMC attribute node parser
+ ******************************************************************************/
+static int manifest_parse_attribute(spmc_manifest_attribute_t *attr,
+				    const void *fdt,
+				    int node)
+{
+	uint32_t val32;
+	int rc;
+
+	assert((attr != NULL) && (fdt != NULL));
+
+	rc = fdt_read_uint32(fdt, node, "maj_ver", &attr->major_version);
+	if (rc != 0) {
+		ERROR("Missing FFA %s version in SPM Core manifest.\n",
+			"major");
+		return rc;
+	}
+
+	rc = fdt_read_uint32(fdt, node, "min_ver", &attr->minor_version);
+	if (rc != 0) {
+		ERROR("Missing FFA %s version in SPM Core manifest.\n",
+			"minor");
+		return rc;
+	}
+
+	rc = fdt_read_uint32(fdt, node, "spmc_id", &val32);
+	if (rc != 0) {
+		ERROR("Missing SPMC ID in manifest.\n");
+		return rc;
+	}
+
+	attr->spmc_id = val32 & 0xffff;
+
+	rc = fdt_read_uint32(fdt, node, "exec_state", &attr->exec_state);
+	if (rc != 0) {
+		NOTICE("%s not specified in SPM Core manifest.\n",
+			"Execution state");
+	}
+
+	rc = fdt_read_uint32(fdt, node, "binary_size", &attr->binary_size);
+	if (rc != 0) {
+		NOTICE("%s not specified in SPM Core manifest.\n",
+			"Binary size");
+	}
+
+	rc = fdt_read_uint64(fdt, node, "load_address", &attr->load_address);
+	if (rc != 0) {
+		NOTICE("%s not specified in SPM Core manifest.\n",
+			"Load address");
+	}
+
+	rc = fdt_read_uint64(fdt, node, "entrypoint", &attr->entrypoint);
+	if (rc != 0) {
+		NOTICE("%s not specified in SPM Core manifest.\n",
+			"Entry point");
+	}
+
+	VERBOSE("SPM Core manifest attribute section:\n");
+	VERBOSE("  version: %u.%u\n", attr->major_version, attr->minor_version);
+	VERBOSE("  spmc_id: 0x%x\n", attr->spmc_id);
+	VERBOSE("  binary_size: 0x%x\n", attr->binary_size);
+	VERBOSE("  load_address: 0x%" PRIx64 "\n", attr->load_address);
+	VERBOSE("  entrypoint: 0x%" PRIx64 "\n", attr->entrypoint);
+
+	return 0;
+}
+
+/*******************************************************************************
+ * Root node handler
+ ******************************************************************************/
+static int manifest_parse_root(spmc_manifest_attribute_t *manifest,
+			       const void *fdt,
+			       int root)
+{
+	int node;
+
+	assert(manifest != NULL);
+
+	node = fdt_subnode_offset_namelen(fdt, root, ATTRIBUTE_ROOT_NODE_STR,
+		sizeof(ATTRIBUTE_ROOT_NODE_STR) - 1);
+	if (node < 0) {
+		ERROR("Root node doesn't contain subnode '%s'\n",
+			ATTRIBUTE_ROOT_NODE_STR);
+		return node;
+	}
+
+	return manifest_parse_attribute(manifest, fdt, node);
+}
+
+/*******************************************************************************
+ * Platform handler to parse a SPM Core manifest.
+ ******************************************************************************/
+int plat_spm_core_manifest_load(spmc_manifest_attribute_t *manifest,
+				const void *pm_addr)
+{
+	int rc, unmap_ret;
+	uintptr_t pm_base, pm_base_align;
+	size_t mapped_size;
+
+	assert(manifest != NULL);
+	assert(pm_addr != NULL);
+
+	/*
+	 * Assume TOS_FW_CONFIG is not necessarily aligned to a page
+	 * boundary, thus calculate the remaining space between SPMC
+	 * manifest start address and upper page limit.
+	 *
+	 */
+	pm_base = (uintptr_t)pm_addr;
+	pm_base_align = page_align(pm_base, UP);
+
+	if (pm_base == pm_base_align) {
+		/* Page aligned */
+		mapped_size = PAGE_SIZE;
+	} else {
+		mapped_size = pm_base_align - pm_base;
+	}
+
+	/* Check space within the page at least maps the FDT header */
+	if (mapped_size < sizeof(struct fdt_header)) {
+		ERROR("Error while mapping SPM Core manifest.\n");
+		return -EINVAL;
+	}
+
+	/* Map first SPMC manifest page in the SPMD translation regime */
+	pm_base_align = page_align(pm_base, DOWN);
+	rc = mmap_add_dynamic_region((unsigned long long)pm_base_align,
+				     pm_base_align,
+				     PAGE_SIZE,
+				     MT_RO_DATA | EL3_PAS);
+	if (rc != 0) {
+		ERROR("Error while mapping SPM Core manifest (%d).\n", rc);
+		return rc;
+	}
+
+	rc = fdt_check_header(pm_addr);
+	if (rc != 0) {
+		ERROR("Wrong format for SPM Core manifest (%d).\n", rc);
+		goto exit_unmap;
+	}
+
+	/* Check SPMC manifest fits within the upper mapped page boundary */
+	if (mapped_size < fdt_totalsize(pm_addr)) {
+		ERROR("SPM Core manifest too large.\n");
+		rc = -EINVAL;
+		goto exit_unmap;
+	}
+
+	VERBOSE("Reading SPM Core manifest at address %p\n", pm_addr);
+
+	rc = fdt_node_offset_by_compatible(pm_addr, -1,
+				"arm,ffa-core-manifest-1.0");
+	if (rc < 0) {
+		ERROR("Unrecognized SPM Core manifest\n");
+		goto exit_unmap;
+	}
+
+	rc = manifest_parse_root(manifest, pm_addr, rc);
+
+exit_unmap:
+	unmap_ret = mmap_remove_dynamic_region(pm_base_align, PAGE_SIZE);
+	if (unmap_ret != 0) {
+		ERROR("Error while unmapping SPM Core manifest (%d).\n",
+			unmap_ret);
+		if (rc == 0) {
+			rc = unmap_ret;
+		}
+	}
+
+	return rc;
+}