> +#define SBI_EXT_LEGACY_SET_TIMER 0x0 > +#define SBI_EXT_LEGACY_CONSOLE_PUTCHAR 0x1 > +#define SBI_EXT_LEGACY_CONSOLE_GETCHAR 0x2 > +#define SBI_EXT_LEGACY_CLEAR_IPI 0x3 > +#define SBI_EXT_LEGACY_SEND_IPI 0x4 > +#define SBI_EXT_LEGACY_REMOTE_FENCE_I 0x5 > +#define SBI_EXT_LEGACY_REMOTE_SFENCE_VMA 0x6 > +#define SBI_EXT_LEGACY_REMOTE_SFENCE_VMA_ASID 0x7 > +#define SBI_EXT_LEGACY_SHUTDOWN 0x8
As Mike said legacy is a bit of a weird name. I think this should be SBI01_* or so. And pleae align the numeric values and maybe use an enum. > + > +#define SBI_CALL_LEGACY(which, arg0, arg1, arg2, arg3) ({ \ > 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); \ Instead of the weird inline assembly with forced register allocation, why not move this to pure assembly? AFAICs this is the whole assembly code we'd need: ENTRY(sbi01_call) ecall END(sbi01_call) > /* Lazy implementations until SBI is finalized */ > -#define SBI_CALL_0(which) SBI_CALL(which, 0, 0, 0, 0) > -#define SBI_CALL_1(which, arg0) SBI_CALL(which, arg0, 0, 0, 0) > -#define SBI_CALL_2(which, arg0, arg1) SBI_CALL(which, arg0, arg1, 0, 0) > -#define SBI_CALL_3(which, arg0, arg1, arg2) \ > - SBI_CALL(which, arg0, arg1, arg2, 0) > -#define SBI_CALL_4(which, arg0, arg1, arg2, arg3) \ > - SBI_CALL(which, arg0, arg1, arg2, arg3) > +#define SBI_CALL_LEGACY_0(which) SBI_CALL_LEGACY(which, 0, 0, 0, 0) > +#define SBI_CALL_LEGACY_1(which, arg0) SBI_CALL_LEGACY(which, arg0, 0, 0, 0) > +#define SBI_CALL_LEGACY_2(which, arg0, arg1) \ > + SBI_CALL_LEGACY(which, arg0, arg1, 0, 0) > +#define SBI_CALL_LEGACY_3(which, arg0, arg1, arg2) \ > + SBI_CALL_LEGACY(which, arg0, arg1, arg2, 0) > +#define SBI_CALL_LEGACY_4(which, arg0, arg1, arg2, arg3) \ > + SBI_CALL_LEGACY(which, arg0, arg1, arg2, arg3) When you touch this anyway I'd suggest you kill these rather pointless wrappers as well as the comment above them.