diff options
Diffstat (limited to 'arch/riscv64/kernel/sbi.c')
| -rw-r--r-- | arch/riscv64/kernel/sbi.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/riscv64/kernel/sbi.c b/arch/riscv64/kernel/sbi.c new file mode 100644 index 0000000..cd3eb1b --- /dev/null +++ b/arch/riscv64/kernel/sbi.c @@ -0,0 +1,28 @@ +#include <sbi.h> + +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) +{ + struct sbiret ret; + + register uintptr_t a0 __asm__ ("a0") = (uintptr_t)(arg0); + register uintptr_t a1 __asm__ ("a1") = (uintptr_t)(arg1); + register uintptr_t a2 __asm__ ("a2") = (uintptr_t)(arg2); + register uintptr_t a3 __asm__ ("a3") = (uintptr_t)(arg3); + register uintptr_t a4 __asm__ ("a4") = (uintptr_t)(arg4); + register uintptr_t a5 __asm__ ("a5") = (uintptr_t)(arg5); + register uintptr_t a6 __asm__ ("a6") = (uintptr_t)(fid); + register uintptr_t a7 __asm__ ("a7") = (uintptr_t)(ext); + + __asm__ volatile ("ecall" + : "+r" (a0), "+r" (a1) + : "r" (a2), "r" (a3), "r" (a4), "r" (a5), "r" (a6), "r" (a7) + : "memory"); + + ret.error = a0; + ret.value = a1; + + return ret; +} |