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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2016-2017 Texas Instruments, Inc.
*/
#include <common.h>
#include <log.h>
#include <linux/libfdt.h>
#include <fdt_support.h>
#include <asm/omap_common.h>
#include <asm/omap_sec_common.h>
#ifdef CONFIG_TI_SECURE_DEVICE
/* Give zero values if not already defined */
#ifndef TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ
#define TI_OMAP5_SECURE_BOOT_RESV_SRAM_SZ (0)
#endif
#ifndef CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ
#define CONFIG_SECURE_RUNTIME_RESV_SRAM_SZ (0)
#endif
int ft_hs_disable_rng(void *fdt, bd_t *bd)
{
const char *path;
int offs;
int ret;
/* Make HW RNG reserved for secure world use */
path = "/ocp/rng";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
debug("Node %s not found.\n", path);
return 0;
}
ret = fdt_setprop_string(fdt, offs,
"status", "disabled");
if (ret < 0) {
printf("Could not add status property to node %s: %s\n",
path, fdt_strerror(ret));
return ret;
}
return 0;
}
#if (CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE != 0)
/*
* fdt_pack_reg - pack address and size array into the "reg"-suitable stream
*/
static int fdt_pack_reg(const void *fdt, void *buf, u64 address, u64 size)
{
int address_cells = fdt_address_cells(fdt, 0);
int size_cells = fdt_size_cells(fdt, 0);
char *p = buf;
if (address_cells == 2)
*(fdt64_t *)p = cpu_to_fdt64(address);
else
*(fdt32_t *)p = cpu_to_fdt32(address);
p += 4 * address_cells;
if (size_cells == 2)
*(fdt64_t *)p = cpu_to_fdt64(size);
else
*(fdt32_t *)p = cpu_to_fdt32(size);
p += 4 * size_cells;
return p - (char *)buf;
}
int ft_hs_fixup_dram(void *fdt, bd_t *bd)
{
const char *path, *subpath;
int offs, len;
u32 sec_mem_start = get_sec_mem_start();
u32 sec_mem_size = CONFIG_TI_SECURE_EMIF_TOTAL_REGION_SIZE;
fdt32_t address_cells = cpu_to_fdt32(fdt_address_cells(fdt, 0));
fdt32_t size_cells = cpu_to_fdt32(fdt_size_cells(fdt, 0));
u8 temp[16]; /* Up to 64-bit address + 64-bit size */
/* Delete any original secure_reserved node */
path = "/reserved-memory/secure_reserved";
offs = fdt_path_offset(fdt, path);
if (offs >= 0)
fdt_del_node(fdt, offs);
/* Add new secure_reserved node */
path = "/reserved-memory";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
debug("Node %s not found\n", path);
path = "/";
subpath = "reserved-memory";
offs = fdt_path_offset(fdt, path);
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s%s node.\n", path, subpath);
return 1;
}
path = "/reserved-memory";
offs = fdt_path_offset(fdt, path);
fdt_setprop(fdt, offs, "#address-cells", &address_cells, sizeof(address_cells));
fdt_setprop(fdt, offs, "#size-cells", &size_cells, sizeof(size_cells));
fdt_setprop(fdt, offs, "ranges", NULL, 0);
}
subpath = "secure_reserved";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s%s node.\n", path, subpath);
return 1;
}
fdt_setprop_string(fdt, offs, "compatible", "ti,secure-memory");
fdt_setprop_string(fdt, offs, "status", "okay");
fdt_setprop(fdt, offs, "no-map", NULL, 0);
len = fdt_pack_reg(fdt, temp, sec_mem_start, sec_mem_size);
fdt_setprop(fdt, offs, "reg", temp, len);
return 0;
}
#else
int ft_hs_fixup_dram(void *fdt, bd_t *bd) { return 0; }
#endif
int ft_hs_add_tee(void *fdt, bd_t *bd)
{
const char *path, *subpath;
int offs;
extern int tee_loaded;
if (!tee_loaded)
return 0;
path = "/firmware";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
path = "/";
offs = fdt_path_offset(fdt, path);
if (offs < 0) {
printf("Could not find root node.\n");
return 1;
}
subpath = "firmware";
offs = fdt_add_subnode(fdt, offs, subpath);
if (offs < 0) {
printf("Could not create %s node.\n", subpath);
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");
return 0;
}
#endif
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