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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>
#ifdef CONFIG_OF_SYSTEM_SETUP
static void set_dt_val(void *data, uint32_t cell_size, uint64_t val)
{
if (cell_size == 1) {
fdt32_t v = cpu_to_fdt32((uint32_t)val);
memcpy(data, &v, sizeof(v));
} else {
fdt64_t v = cpu_to_fdt64(val);
memcpy(data, &v, sizeof(v));
}
}
static int add_dt_path_subnode(void *fdt, const char *path, const char *subnode)
{
int offs;
offs = fdt_path_offset(fdt, path);
if (offs < 0)
return -1;
offs = fdt_add_subnode(fdt, offs, subnode);
if (offs < 0)
return -1;
return offs;
}
static int add_res_mem_dt_node(void *fdt, const char *name, phys_addr_t pa,
size_t size)
{
int offs = 0;
int ret = 0;
int addr_size = -1;
int len_size = -1;
bool found = true;
char subnode_name[80] = { 0 };
offs = fdt_path_offset(fdt, "/reserved-memory");
if (offs < 0) {
found = false;
offs = 0;
}
len_size = fdt_size_cells(fdt, offs);
if (len_size < 0)
return -1;
addr_size = fdt_address_cells(fdt, offs);
if (addr_size < 0)
return -1;
if (!found) {
offs = add_dt_path_subnode(fdt, "/", "reserved-memory");
if (offs < 0)
return -1;
ret = fdt_setprop_cell(fdt, offs, "#address-cells", addr_size);
if (ret < 0)
return -1;
ret = fdt_setprop_cell(fdt, offs, "#size-cells", len_size);
if (ret < 0)
return -1;
ret = fdt_setprop(fdt, offs, "ranges", NULL, 0);
if (ret < 0)
return -1;
}
snprintf(subnode_name, sizeof(subnode_name), "%s@0x%llx", name, pa);
offs = fdt_add_subnode(fdt, offs, subnode_name);
if (offs >= 0) {
u32 data[FDT_MAX_NCELLS * 2];
set_dt_val(data, addr_size, pa);
set_dt_val(data + addr_size, len_size, size);
ret = fdt_setprop(fdt, offs, "reg", data,
sizeof(uint32_t) * (addr_size + len_size));
if (ret < 0)
return -1;
ret = fdt_setprop(fdt, offs, "no-map", NULL, 0);
if (ret < 0)
return -1;
} else {
return -1;
}
return 0;
}
int ft_add_optee_node(void *fdt, bd_t *bd)
{
const char *path, *subpath;
int ret = 0;
int offs;
phys_addr_t optee_start;
size_t optee_size;
/*
* No TEE space allocated indicating no TEE running, so no
* need to add optee node in dts
*/
if (!rom_pointer[1])
return 0;
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;
}
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");
ret = add_res_mem_dt_node(fdt, "optee_core", optee_start, optee_size);
if (ret < 0) {
printf("Could not create optee_core node.\n");
return -1;
}
ret = add_res_mem_dt_node(fdt, "optee_shm", optee_start + optee_size,
OPTEE_SHM_SIZE);
if (ret < 0) {
printf("Could not create optee_shm node.\n");
return -1;
}
return ret;
}
#endif
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