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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2020 NXP
*/
#include <common.h>
#include <asm/arch/sys_proto.h>
#include <asm/mach-imx/optee.h>
#include <errno.h>
#include <fdt_support.h>
#include <fdtdec.h>
#ifdef CONFIG_OF_SYSTEM_SETUP
int ft_add_optee_node(void *fdt, struct bd_info *bd)
{
const char *path, *subpath;
int ret = 0;
int offs;
phys_addr_t optee_start;
size_t optee_size;
/* Not let uboot create the node */
if (CONFIG_IS_ENABLED(XEN))
return 0;
/*
* No TEE space allocated indicating no TEE running, so no
* need to add optee node in dts
*/
if (!rom_pointer[1])
return 0;
#ifdef CONFIG_OF_LIBFDT_OVERLAY
if (rom_pointer[2]) {
debug("OP-TEE: applying overlay on 0x%lx\n",rom_pointer[2]);
ret = fdt_check_header((void*)rom_pointer[2]);
if (ret == 0) {
/* Copy the fdt overlay to next 1M and use copied overlay */
memcpy((void *)(rom_pointer[2] + SZ_1M), (void *)rom_pointer[2],
fdt_totalsize((void*)rom_pointer[2]));
ret = fdt_overlay_apply_verbose(fdt, (void*)(rom_pointer[2] + SZ_1M));
if (ret == 0) {
debug("Overlay applied with success");
fdt_pack(fdt);
return 0;
}
}
}
/* Fallback to previous implementation */
#endif
optee_start = (phys_addr_t)rom_pointer[0];
optee_size = rom_pointer[1] - OPTEE_SHM_SIZE;
offs = fdt_increase_size(fdt, 512);
if (offs) {
printf("No Space for dtb\n");
return -1;
}
path = "/firmware";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
offs = add_dt_path_subnode(fdt, "/", "firmware");
if (offs < 0)
return -1;
}
if (fdt_path_offset(fdt, "/firmware/optee") < 0) {
subpath = "optee";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
return -1;
}
fdt_setprop_string(fdt, offs, "compatible", "linaro,optee-tz");
fdt_setprop_string(fdt, offs, "method", "smc");
}
unsigned long flags = FDTDEC_RESERVED_MEMORY_NO_MAP;
struct fdt_memory carveout = {
.start = optee_start,
.end = optee_start + optee_size - 1,
};
ret = fdtdec_add_reserved_memory(fdt, "optee_core", &carveout,
NULL, 0, NULL, flags);
if (ret < 0) {
printf("Could not create optee_core node.\n");
return -1;
}
carveout.start = optee_start + optee_size;
carveout.end = optee_start + optee_size + OPTEE_SHM_SIZE - 1;
ret = fdtdec_add_reserved_memory(fdt, "optee_shm", &carveout,
NULL, 0, NULL, flags);
if (ret < 0) {
printf("Could not create optee_shm node.\n");
return -1;
}
return ret;
}
#endif
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