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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2017 Linaro
- * Bryan O'Donoghue <bryan.odonoghue@linaro.org>
- */
- #include <common.h>
- #include <fdtdec.h>
- #include <image.h>
- #include <log.h>
- #include <malloc.h>
- #include <dm/ofnode.h>
- #include <linux/ioport.h>
- #include <linux/libfdt.h>
- #include <tee/optee.h>
- #define optee_hdr_err_msg \
- "OPTEE verification error:" \
- "\n\thdr=%p image=0x%08lx magic=0x%08x" \
- "\n\theader lo=0x%08x hi=0x%08x size=0x%08lx arch=0x%08x" \
- "\n\tuimage params 0x%08lx-0x%08lx\n"
- #if defined(CONFIG_OPTEE_IMAGE)
- static int optee_verify_image(struct optee_header *hdr, unsigned long image_len)
- {
- uint32_t tee_file_size;
- tee_file_size = hdr->init_size + hdr->paged_size +
- sizeof(struct optee_header);
- if (hdr->magic != OPTEE_MAGIC ||
- hdr->version != OPTEE_VERSION ||
- tee_file_size != image_len) {
- return -EINVAL;
- }
- return 0;
- }
- int optee_verify_bootm_image(unsigned long image_addr,
- unsigned long image_load_addr,
- unsigned long image_len)
- {
- struct optee_header *hdr = (struct optee_header *)image_addr;
- int ret;
- ret = optee_verify_image(hdr, image_len);
- if (ret)
- goto error;
- if (image_load_addr + sizeof(*hdr) != hdr->init_load_addr_lo) {
- ret = -EINVAL;
- goto error;
- }
- return ret;
- error:
- printf(optee_hdr_err_msg, hdr, image_addr, hdr->magic,
- hdr->init_load_addr_lo,
- hdr->init_load_addr_hi, image_len, hdr->arch, image_load_addr,
- image_load_addr + image_len);
- return ret;
- }
- #endif
- #if defined(CONFIG_OF_LIBFDT)
- static int optee_copy_firmware_node(ofnode node, void *fdt_blob)
- {
- int offs, ret, len;
- const void *prop;
- offs = fdt_path_offset(fdt_blob, "/firmware");
- if (offs < 0) {
- offs = fdt_path_offset(fdt_blob, "/");
- if (offs < 0)
- return offs;
- offs = fdt_add_subnode(fdt_blob, offs, "firmware");
- if (offs < 0)
- return offs;
- }
- offs = fdt_add_subnode(fdt_blob, offs, "optee");
- if (offs < 0)
- return offs;
- /* copy the compatible property */
- prop = ofnode_get_property(node, "compatible", &len);
- if (!prop) {
- debug("missing OP-TEE compatible property");
- return -EINVAL;
- }
- ret = fdt_setprop(fdt_blob, offs, "compatible", prop, len);
- if (ret < 0)
- return ret;
- /* copy the method property */
- prop = ofnode_get_property(node, "method", &len);
- if (!prop) {
- debug("missing OP-TEE method property");
- return -EINVAL;
- }
- ret = fdt_setprop(fdt_blob, offs, "method", prop, len);
- if (ret < 0)
- return ret;
- return 0;
- }
- int optee_copy_fdt_nodes(void *new_blob)
- {
- ofnode node, subnode;
- int ret;
- struct resource res;
- if (fdt_check_header(new_blob))
- return -EINVAL;
- /* only proceed if there is an /firmware/optee node */
- node = ofnode_path("/firmware/optee");
- if (!ofnode_valid(node)) {
- debug("No OP-TEE firmware node in old fdt, nothing to do");
- return 0;
- }
- /*
- * Do not proceed if the target dt already has an OP-TEE node.
- * In this case assume that the system knows better somehow,
- * so do not interfere.
- */
- if (fdt_path_offset(new_blob, "/firmware/optee") >= 0) {
- debug("OP-TEE Device Tree node already exists in target");
- return 0;
- }
- ret = optee_copy_firmware_node(node, new_blob);
- if (ret < 0) {
- printf("Failed to add OP-TEE firmware node\n");
- return ret;
- }
- /* optee inserts its memory regions as reserved-memory nodes */
- node = ofnode_path("/reserved-memory");
- if (ofnode_valid(node)) {
- ofnode_for_each_subnode(subnode, node) {
- const char *name = ofnode_get_name(subnode);
- if (!name)
- return -EINVAL;
- /* only handle optee reservations */
- if (strncmp(name, "optee", 5))
- continue;
- /* check if this subnode has a reg property */
- ret = ofnode_read_resource(subnode, 0, &res);
- if (!ret) {
- struct fdt_memory carveout = {
- .start = res.start,
- .end = res.end,
- };
- unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
- char *oldname, *nodename, *tmp;
- oldname = strdup(name);
- if (!oldname)
- return -ENOMEM;
- tmp = oldname;
- nodename = strsep(&tmp, "@");
- if (!nodename) {
- free(oldname);
- return -EINVAL;
- }
- ret = fdtdec_add_reserved_memory(new_blob,
- nodename,
- &carveout,
- NULL, 0,
- NULL, flags);
- free(oldname);
- if (ret < 0)
- return ret;
- }
- }
- }
- return 0;
- }
- #endif
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