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![Andrew F. Davis](/assets/img/avatar_default.png)
If a firmware node is already present in the FDT we will fail to create one and so fail to add our OP-TEE node, make this fixup first check for a firmware node and then only try to add one if it is not found. Signed-off-by: Andrew F. Davis <afd@ti.com>
169 lines
4.0 KiB
C
169 lines
4.0 KiB
C
/*
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* Copyright 2016-2017 Texas Instruments, Inc.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <libfdt.h>
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#include <fdt_support.h>
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#include <asm/omap_common.h>
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#include <asm/omap_sec_common.h>
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#ifdef CONFIG_TI_SECURE_DEVICE
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/* Give zero values if not already defined */
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#ifndef TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ
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#define TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ (0)
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#endif
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#ifndef CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ
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#define CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ (0)
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#endif
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int ft_hs_disable_rng(void *fdt, bd_t *bd)
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{
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const char *path;
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int offs;
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int ret;
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/* Make HW RNG reserved for secure world use */
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path = "/ocp/rng";
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offs = fdt_path_offset(fdt, path);
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if (offs < 0) {
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debug("Node %s not found.\n", path);
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return 0;
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}
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ret = fdt_setprop_string(fdt, offs,
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"status", "disabled");
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if (ret < 0) {
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printf("Could not add status property to node %s: %s\n",
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path, fdt_strerror(ret));
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return ret;
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}
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return 0;
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}
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#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE != 0)
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/*
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* fdt_pack_reg - pack address and size array into the "reg"-suitable stream
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*/
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static int fdt_pack_reg(const void *fdt, void *buf, u64 address, u64 size)
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{
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int address_cells = fdt_address_cells(fdt, 0);
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int size_cells = fdt_size_cells(fdt, 0);
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char *p = buf;
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if (address_cells == 2)
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*(fdt64_t *)p = cpu_to_fdt64(address);
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else
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*(fdt32_t *)p = cpu_to_fdt32(address);
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p += 4 * address_cells;
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if (size_cells == 2)
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*(fdt64_t *)p = cpu_to_fdt64(size);
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else
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*(fdt32_t *)p = cpu_to_fdt32(size);
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p += 4 * size_cells;
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return p - (char *)buf;
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}
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int ft_hs_fixup_dram(void *fdt, bd_t *bd)
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{
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const char *path, *subpath;
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int offs, len;
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u32 sec_mem_start = get_sec_mem_start();
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u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
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fdt32_t address_cells = cpu_to_fdt32(fdt_address_cells(fdt, 0));
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fdt32_t size_cells = cpu_to_fdt32(fdt_size_cells(fdt, 0));
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u8 temp[16]; /* Up to 64-bit address + 64-bit size */
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/* Delete any original secure_reserved node */
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path = "/reserved-memory/secure_reserved";
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offs = fdt_path_offset(fdt, path);
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if (offs >= 0)
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fdt_del_node(fdt, offs);
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/* Add new secure_reserved node */
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path = "/reserved-memory";
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offs = fdt_path_offset(fdt, path);
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if (offs < 0) {
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debug("Node %s not found\n", path);
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path = "/";
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subpath = "reserved-memory";
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offs = fdt_path_offset(fdt, path);
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offs = fdt_add_subnode(fdt, offs, subpath);
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if (offs < 0) {
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printf("Could not create %s%s node.\n", path, subpath);
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return 1;
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}
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path = "/reserved-memory";
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offs = fdt_path_offset(fdt, path);
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fdt_setprop(fdt, offs, "#address-cells", &address_cells, sizeof(address_cells));
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fdt_setprop(fdt, offs, "#size-cells", &size_cells, sizeof(size_cells));
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fdt_setprop(fdt, offs, "ranges", NULL, 0);
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}
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subpath = "secure_reserved";
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offs = fdt_add_subnode(fdt, offs, subpath);
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if (offs < 0) {
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printf("Could not create %s%s node.\n", path, subpath);
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return 1;
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}
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fdt_setprop_string(fdt, offs, "compatible", "ti,secure-memory");
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fdt_setprop_string(fdt, offs, "status", "okay");
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fdt_setprop(fdt, offs, "no-map", NULL, 0);
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len = fdt_pack_reg(fdt, temp, sec_mem_start, sec_mem_size);
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fdt_setprop(fdt, offs, "reg", temp, len);
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return 0;
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}
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#else
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int ft_hs_fixup_dram(void *fdt, bd_t *bd) { return 0; }
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#endif
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int ft_hs_add_tee(void *fdt, bd_t *bd)
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{
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const char *path, *subpath;
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int offs;
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extern int tee_loaded;
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if (!tee_loaded)
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return 0;
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path = "/firmware";
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offs = fdt_path_offset(fdt, path);
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if (offs < 0) {
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path = "/";
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offs = fdt_path_offset(fdt, path);
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if (offs < 0) {
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printf("Could not find root node.\n");
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return 1;
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}
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subpath = "firmware";
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offs = fdt_add_subnode(fdt, offs, subpath);
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if (offs < 0) {
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printf("Could not create %s node.\n", subpath);
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return 1;
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}
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}
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subpath = "optee";
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offs = fdt_add_subnode(fdt, offs, subpath);
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if (offs < 0) {
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printf("Could not create %s node.\n", subpath);
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return 1;
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}
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fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
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fdt_setprop_string(fdt, offs, "method", "smc");
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return 0;
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}
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#endif
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