diff options
Diffstat (limited to 'arch/riscv/include/csr.h')
| -rw-r--r-- | arch/riscv/include/csr.h | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/arch/riscv/include/csr.h b/arch/riscv/include/csr.h index 694000b..5da0882 100644 --- a/arch/riscv/include/csr.h +++ b/arch/riscv/include/csr.h @@ -1,8 +1,22 @@ #ifndef APOS_CSR_H #define APOS_CSR_H -#define csr_write(csr, val) - #define SATP_MODE_39 0x8000000000000000 +#define SATP_MODE_48 0x9000000000000000 + +#define CSR_SATP 0x180 + +/* directly lifted from Linux:/arch/riscv/include/asm/asm.h:9-13 */ +#ifdef __ASSEMBLY__ +#define __ASM_STR(x) x +#else +#define __ASM_STR(x) #x +#endif + +#define csr_read(csr, res)\ + __asm__ ("csrr %0, " __ASM_STR(csr) : "=r" (res) : : "memory") + +#define csr_write(csr, val)\ + __asm__ ("csrw " __ASM_STR(csr) ", %0" : : "rK" (val) : "memory") #endif /* APOS_CSR_H */ |