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riscv: Implement riscv_get_time() API using rdtime instruction
authorAnup Patel <anup@brainfault.org>
Wed, 12 Dec 2018 14:12:31 +0000 (06:12 -0800)
committerAndes <uboot@andestech.com>
Tue, 18 Dec 2018 01:56:27 +0000 (09:56 +0800)
commit511107d85d6f2739a641076acfb5646ba2a19fc8
treef71c7e8185c6fe4ae6881e41d811e9d15f25672atree | snapshot
parent644a3cd77e840d1be6a714b8ce284d6ef3ad2f06commit | diff
riscv: Implement riscv_get_time() API using rdtime instruction

This adds an implementation of riscv_get_time() API that is using
rdtime instruction.

This is the case for S-mode U-Boot, and is useful for processors
that support rdtime in M-mode too.

Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
arch/riscv/Kconfig diff | blob | history
arch/riscv/lib/Makefile diff | blob | history
arch/riscv/lib/rdtime.c [new file with mode: 0644] blob
My U-Boot fork