blob: ef1e3d8f4af0b7532a68651c7b56515ce5727013 [file] [log] [blame]
* Trusted Foundations support for ARM CPUs
* Copyright (c) 2013, NVIDIA Corporation.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/of.h>
#include <asm/firmware.h>
#include <asm/trusted_foundations.h>
#define TF_SET_CPU_BOOT_ADDR_SMC 0xfffff200
static void __naked tf_generic_smc(u32 type, u32 arg1, u32 arg2)
asm volatile(
".arch_extension sec\n\t"
"stmfd sp!, {r4 - r11, lr}\n\t"
__asmeq("%0", "r0")
__asmeq("%1", "r1")
__asmeq("%2", "r2")
"mov r3, #0\n\t"
"mov r4, #0\n\t"
"smc #0\n\t"
"ldmfd sp!, {r4 - r11, pc}"
: "r" (type), "r" (arg1), "r" (arg2)
: "memory");
static int tf_set_cpu_boot_addr(int cpu, unsigned long boot_addr)
tf_generic_smc(TF_SET_CPU_BOOT_ADDR_SMC, boot_addr, 0);
return 0;
static const struct firmware_ops trusted_foundations_ops = {
.set_cpu_boot_addr = tf_set_cpu_boot_addr,
void register_trusted_foundations(struct trusted_foundations_platform_data *pd)
* we are not using version information for now since currently
* supported SMCs are compatible with all TF releases
void of_register_trusted_foundations(void)
struct device_node *node;
struct trusted_foundations_platform_data pdata;
int err;
node = of_find_compatible_node(NULL, NULL, "tlm,trusted-foundations");
if (!node)
err = of_property_read_u32(node, "tlm,version-major",
if (err != 0)
panic("Trusted Foundation: missing version-major property\n");
err = of_property_read_u32(node, "tlm,version-minor",
if (err != 0)
panic("Trusted Foundation: missing version-minor property\n");