This patch series adds support to access CSR using both CSR name and CSR numbers.
Also, 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. (e.g. sptbr => CSR_SATP, sbadaddr => CSR_STVAL, etc.) 3. We can access newly added CSRs even if toolchain does not recognize newly addes CSRs by name. (e.g. BSSTATUS, BSIE, SSIP, etc.) The patchset can be found in riscv_csr_number_v1 branch of https//github.com/avpatel/linux.git Anup Patel (3): RISC-V: Add separate asm/encoding.h for spec related defines RISC-V: Add defines for CSR numbers RISC-V: Access CSRs using CSR numbers arch/riscv/include/asm/csr.h | 67 +----- arch/riscv/include/asm/encoding.h | 299 +++++++++++++++++++++++++++ arch/riscv/include/asm/irqflags.h | 10 +- arch/riscv/include/asm/mmu_context.h | 2 +- arch/riscv/kernel/entry.S | 22 +- arch/riscv/kernel/head.S | 12 +- arch/riscv/kernel/perf_event.c | 4 +- arch/riscv/kernel/smp.c | 2 +- arch/riscv/kernel/traps.c | 6 +- arch/riscv/mm/fault.c | 2 +- 10 files changed, 338 insertions(+), 88 deletions(-) create mode 100644 arch/riscv/include/asm/encoding.h -- 2.17.1
