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| author | Neil Armstrong <narmstrong@baylibre.com> | 2019-06-12 12:49:06 +0300 |
|---|---|---|
| committer | Neil Armstrong <narmstrong@baylibre.com> | 2019-07-04 17:04:59 +0300 |
| commit | 0ef8e4069e410f872558c26af2486041cb797663 (patch) | |
| tree | 34337455504263606dcbee5b41030281f54fda56 /arch/arm/mach-meson | |
| parent | aca71d69273593a361710a6b0e933d91b261ea77 (diff) | |
| download | u-boot-0ef8e4069e410f872558c26af2486041cb797663.tar.xz | |
ARM: meson: sm: Add secure monitor calls to retrieve SoC serial number
The Secure Monitor interface permits retrieving the SoC Serial Number,
add a function to retrieve it.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Diffstat (limited to 'arch/arm/mach-meson')
| -rw-r--r-- | arch/arm/mach-meson/sm.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/arm/mach-meson/sm.c b/arch/arm/mach-meson/sm.c index a07b46895d..05b7f0bdf2 100644 --- a/arch/arm/mach-meson/sm.c +++ b/arch/arm/mach-meson/sm.c @@ -6,12 +6,14 @@ */ #include <common.h> +#include <asm/arch/sm.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 +#define FN_CHIP_ID 0x82000044 static void *shmem_input; static void *shmem_output; @@ -53,3 +55,25 @@ ssize_t meson_sm_read_efuse(uintptr_t offset, void *buffer, size_t size) return regs.regs[0]; } + +#define SM_CHIP_ID_LENGTH 119 +#define SM_CHIP_ID_OFFSET 4 +#define SM_CHIP_ID_SIZE 12 + +int meson_sm_get_serial(void *buffer, size_t size) +{ + struct pt_regs regs; + + meson_init_shmem(); + + regs.regs[0] = FN_CHIP_ID; + regs.regs[1] = 0; + regs.regs[2] = 0; + + smc_call(®s); + + memcpy(buffer, shmem_output + SM_CHIP_ID_OFFSET, + min_t(size_t, size, SM_CHIP_ID_SIZE)); + + return 0; +} |