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#ifndef APOS_RISCV_SBI_H
#define APOS_RISCV_SBI_H
/**
* @file sbi.h
* riscv64-specific OpenSBI definitions.
*/
#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 */
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