diff options
Diffstat (limited to 'arch/riscv64/include')
| -rw-r--r-- | arch/riscv64/include/sbi.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/riscv64/include/sbi.h b/arch/riscv64/include/sbi.h index e6ceb92..b750475 100644 --- a/arch/riscv64/include/sbi.h +++ b/arch/riscv64/include/sbi.h @@ -1,13 +1,49 @@ #ifndef APOS_RISCV_SBI_H +#define APOS_RISCV_SBI_H + +#include <apos/types.h> struct sbiret { long error; long value; }; +enum { + SBI_SUCCESS = 0, + SBI_ERR_FAILED = -1, + SBI_ERR_NOT_SUPPORTED = -2, + SBI_ERR_INVALID_PARAM = -3, + SBI_ERR_DENIED = -4, + SBI_ERR_INVALID_ADDRESS = -5, + SBI_ERR_ALREADY_AVAILABLE = -6, + SBI_ERR_ALREADY_STARTED = -7, + SBI_ERR_ALREADY_STOPEED = -8, +}; + +/* TODO: query which extensions are available */ struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, unsigned long arg1, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5); +#define EID_TIME 0x54494D45 +#define FID_SET_TIMER 0 +static inline struct sbiret sbi_set_timer(uint64_t stime_value) +{ + /* TODO: read timebase from fdt, seems to be clocks/sec for accurate + * timers */ +#if __riscv_xlen == 32 + return sbi_ecall(EID_TIME, FID_SET_TIMER, stime_value, stime_value >> 32, 0, 0, 0, 0); +#else + return sbi_ecall(EID_TIME, FID_SET_TIMER, stime_value, 0, 0, 0, 0, 0); +#endif +} + +#define EID_SRST 0x53525354 +#define FID_RESET 0 +static inline struct sbiret sbi_system_reset(uint32_t reset_type, uint32_t reset_reason) +{ + return sbi_ecall(EID_SRST, FID_RESET, reset_type, reset_reason, 0, 0, 0, 0); +} + #endif /* APOS_RISCV_SBI_H */ |