diff options
Diffstat (limited to 'arch/arm/mach-omap2/omap-secure.c')
| -rw-r--r-- | arch/arm/mach-omap2/omap-secure.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/omap-secure.c b/arch/arm/mach-omap2/omap-secure.c index 24298e47b9f1..d00e3c72e37d 100644 --- a/arch/arm/mach-omap2/omap-secure.c +++ b/arch/arm/mach-omap2/omap-secure.c @@ -8,18 +8,42 @@ * Copyright (C) 2013 Pali Rohár <pali.rohar@gmail.com> */ +#include <linux/arm-smccc.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> #include <linux/memblock.h> +#include <linux/of.h> #include <asm/cacheflush.h> #include <asm/memblock.h> +#include "common.h" #include "omap-secure.h" static phys_addr_t omap_secure_memblock_base; +bool optee_available; + +#define OMAP_SIP_SMC_STD_CALL_VAL(func_num) \ + ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_SIP, (func_num)) + +static void __init omap_optee_init_check(void) +{ + struct device_node *np; + + /* + * We only check that the OP-TEE node is present and available. The + * OP-TEE kernel driver is not needed for the type of interaction made + * with OP-TEE here so the driver's status is not checked. + */ + np = of_find_node_by_path("/firmware/optee"); + if (np && of_device_is_available(np)) + optee_available = true; + of_node_put(np); +} + /** * omap_sec_dispatcher: Routine to dispatch low power secure * service routines @@ -53,6 +77,27 @@ u32 omap_secure_dispatcher(u32 idx, u32 flag, u32 nargs, u32 arg1, u32 arg2, return ret; } +void omap_smccc_smc(u32 fn, u32 arg) +{ + struct arm_smccc_res res; + + arm_smccc_smc(OMAP_SIP_SMC_STD_CALL_VAL(fn), arg, + 0, 0, 0, 0, 0, 0, &res); + WARN(res.a0, "Secure function call 0x%08x failed\n", fn); +} + +void omap_smc1(u32 fn, u32 arg) +{ + /* + * If this platform has OP-TEE installed we use ARM SMC calls + * otherwise fall back to the OMAP ROM style calls. + */ + if (optee_available) + omap_smccc_smc(fn, arg); + else + _omap_smc1(fn, arg); +} + /* Allocate the memory to save secure ram */ int __init omap_secure_ram_reserve_memblock(void) { @@ -163,3 +208,8 @@ u32 rx51_secure_rng_call(u32 ptr, u32 count, u32 flag) NO_FLAG, 3, ptr, count, flag, 0); } + +void __init omap_secure_init(void) +{ + omap_optee_init_check(); +} |