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author | Beniamino Galvani <b.galvani@gmail.com> | 2016-05-08 06:30:17 (GMT) |
---|---|---|
committer | Tom Rini <trini@konsulko.com> | 2016-05-27 19:39:47 (GMT) |
commit | c7757d46958463542f3c5cc359d53769f83b9148 (patch) | |
tree | ed1ef09debacb926671168f5c7540587f5176bcb /arch/arm | |
parent | bfcef28ae4cf04e7c1fd3aea1d60a17bd046f153 (diff) | |
download | u-boot-c7757d46958463542f3c5cc359d53769f83b9148.tar.xz |
arm: meson: implement calls to secure monitor
Implement calls to secure monitor to read the MAC address from e-fuse.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Diffstat (limited to 'arch/arm')
-rw-r--r-- | arch/arm/include/asm/arch-meson/sm.h | 12 | ||||
-rw-r--r-- | arch/arm/mach-meson/Makefile | 2 | ||||
-rw-r--r-- | arch/arm/mach-meson/board.c | 1 | ||||
-rw-r--r-- | arch/arm/mach-meson/sm.c | 57 |
4 files changed, 71 insertions, 1 deletions
diff --git a/arch/arm/include/asm/arch-meson/sm.h b/arch/arm/include/asm/arch-meson/sm.h new file mode 100644 index 0000000..225438d --- /dev/null +++ b/arch/arm/include/asm/arch-meson/sm.h @@ -0,0 +1,12 @@ +/* + * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __MESON_SM_H__ +#define __MESON_SM_H__ + +ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size); + +#endif /* __MESON_SM_H__ */ diff --git a/arch/arm/mach-meson/Makefile b/arch/arm/mach-meson/Makefile index 44e3d63..bf49b8b 100644 --- a/arch/arm/mach-meson/Makefile +++ b/arch/arm/mach-meson/Makefile @@ -4,4 +4,4 @@ # SPDX-License-Identifier: GPL-2.0+ # -obj-y += board.o +obj-y += board.o sm.o diff --git a/arch/arm/mach-meson/board.c b/arch/arm/mach-meson/board.c index 782f86c..64fa3c1 100644 --- a/arch/arm/mach-meson/board.c +++ b/arch/arm/mach-meson/board.c @@ -8,6 +8,7 @@ #include <libfdt.h> #include <linux/err.h> #include <asm/arch/gxbb.h> +#include <asm/arch/sm.h> #include <asm/armv8/mmu.h> #include <asm/unaligned.h> diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c new file mode 100644 index 0000000..1b35a22 --- /dev/null +++ b/arch/arm/mach-meson/sm.c @@ -0,0 +1,57 @@ +/* + * (C) Copyright 2016 Beniamino Galvani <b.galvani@gmail.com> + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Secure monitor calls. + */ + +#include <common.h> +#include <asm/arch/gxbb.h> +#include <linux/kernel.h> + +#define FN_GET_SHARE_MEM_INPUT_BASE 0x82000020 +#define FN_GET_SHARE_MEM_OUTPUT_BASE 0x82000021 +#define FN_EFUSE_READ 0x82000030 +#define FN_EFUSE_WRITE 0x82000031 + +static void *shmem_input; +static void *shmem_output; + +static void meson_init_shmem(void) +{ + struct pt_regs regs; + + if (shmem_input && shmem_output) + return; + + regs.regs[0] = FN_GET_SHARE_MEM_INPUT_BASE; + smc_call(®s); + shmem_input = (void *)regs.regs[0]; + + regs.regs[0] = FN_GET_SHARE_MEM_OUTPUT_BASE; + smc_call(®s); + shmem_output = (void *)regs.regs[0]; + + debug("Secure Monitor shmem: 0x%p 0x%p\n", shmem_input, shmem_output); +} + +ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size) +{ + struct pt_regs regs; + + meson_init_shmem(); + + regs.regs[0] = FN_EFUSE_READ; + regs.regs[1] = offset; + regs.regs[2] = size; + + smc_call(®s); + + if (regs.regs[0] == 0) + return -1; + + memcpy(buffer, shmem_output, min(size, regs.regs[0])); + + return regs.regs[0]; +} |