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authorBin Meng <bmeng.cn@gmail.com>2019-07-10 23:43:13 -0700
committerAndes <uboot@andestech.com>2019-08-15 13:42:28 +0800
commit4d2583dba13f9313f21fb58fb3a4c51b11770e44 (patch)
tree26cf69a122a61b2a54ff75b6489414353cff1348 /board/cobra5272
parent268753f8e6e7e201966763c53acfea84941ed544 (diff)
riscv: Access CSRs using CSR numbers
We should prefer accessing CSRs using their CSR numbers because: 1. It compiles fine with older toolchains. 2. We can use latest CSR names in #define macro names of CSR numbers as-per RISC-V spec. 3. We can access newly added CSRs even if toolchain does not recognize newly added CSRs by name. This commit is inspired from Linux kernel commit a3182c91ef4e ("RISC-V: Access CSRs using CSR numbers"). Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Rick Chen <rick@andestech.com> Reviewed-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
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