From: Daniel Allred d-allred@ti.com
Adds a generic C-callable API for making secure ROM calls on OMAP and OMAP-compatible devices. This API provides the important function of flushing the ROM call arguments to memory from the cache, so that the secure world will have a coherent view of those arguments. Then is simply calls the omap_smc_sec routine.
Signed-off-by: Daniel Allred d-allred@ti.com Signed-off-by: Andreas Dannenberg dannenberg@ti.com --- arch/arm/cpu/armv7/omap-common/Makefile | 4 +++ arch/arm/cpu/armv7/omap-common/sec_bridge.c | 47 +++++++++++++++++++++++++++++ arch/arm/include/asm/omap_common.h | 4 +++ 3 files changed, 55 insertions(+) create mode 100644 arch/arm/cpu/armv7/omap-common/sec_bridge.c
diff --git a/arch/arm/cpu/armv7/omap-common/Makefile b/arch/arm/cpu/armv7/omap-common/Makefile index 87a7ac0..4fc3926 100644 --- a/arch/arm/cpu/armv7/omap-common/Makefile +++ b/arch/arm/cpu/armv7/omap-common/Makefile @@ -28,6 +28,10 @@ obj-y += pipe3-phy.o obj-$(CONFIG_SCSI_AHCI_PLAT) += sata.o endif
+ifneq ($(CONFIG_TI_SECURE_DEVICE),) +obj-y += sec_bridge.o +endif + ifeq ($(CONFIG_SYS_DCACHE_OFF),) obj-y += omap-cache.o endif diff --git a/arch/arm/cpu/armv7/omap-common/sec_bridge.c b/arch/arm/cpu/armv7/omap-common/sec_bridge.c new file mode 100644 index 0000000..4eaba8e --- /dev/null +++ b/arch/arm/cpu/armv7/omap-common/sec_bridge.c @@ -0,0 +1,47 @@ +/* + * + * Common bridge function to make OMAP secure ROM calls + * + * (C) Copyright 2016 + * Texas Instruments, <www.ti.com> + * + * Daniel Allred d-allred@ti.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <stdarg.h> + +#include <asm/arch/sys_proto.h> +#include <asm/omap_common.h> + +static uint32_t secure_rom_call_args[5] __aligned(ARCH_DMA_MINALIGN); + +u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...) +{ + int i; + u32 num_args; + va_list ap; + + va_start(ap, flag); + + num_args = va_arg(ap, u32); + + /* Copy args to aligned args structure */ + for (i = 0; i < num_args; i++) + secure_rom_call_args[i + 1] = va_arg(ap, u32); + + secure_rom_call_args[0] = num_args; + + va_end(ap); + + /* if data cache is enabled, flush the aligned args structure */ +#ifndef CONFIG_SYS_DCACHE_OFF + flush_dcache_range( + (unsigned int)&secure_rom_call_args[0], + (unsigned int)&secure_rom_call_args[0] + + roundup(sizeof(secure_rom_call_args), ARCH_DMA_MINALIGN)); +#endif + return omap_smc_sec(service, proc_id, flag, secure_rom_call_args); +} diff --git a/arch/arm/include/asm/omap_common.h b/arch/arm/include/asm/omap_common.h index 5943e6f..cb02c88 100644 --- a/arch/arm/include/asm/omap_common.h +++ b/arch/arm/include/asm/omap_common.h @@ -629,6 +629,10 @@ void omap_smc1(u32 service, u32 val);
u32 omap_smc_sec(u32 service, u32 proc_id, u32 flag, u32 *params);
+#ifdef CONFIG_TI_SECURE_DEVICE +u32 secure_rom_call(u32 service, u32 proc_id, u32 flag, ...); +#endif + void enable_edma3_clocks(void); void disable_edma3_clocks(void);