1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 Regents of the University of California 4 */ 5 6 #ifndef _ASM_RISCV_SBI_H 7 #define _ASM_RISCV_SBI_H 8 9 #include <linux/types.h> 10 11 #define SBI_SET_TIMER 0 12 #define SBI_CONSOLE_PUTCHAR 1 13 #define SBI_CONSOLE_GETCHAR 2 14 #define SBI_CLEAR_IPI 3 15 #define SBI_SEND_IPI 4 16 #define SBI_REMOTE_FENCE_I 5 17 #define SBI_REMOTE_SFENCE_VMA 6 18 #define SBI_REMOTE_SFENCE_VMA_ASID 7 19 #define SBI_SHUTDOWN 8 20 21 #define SBI_CALL(which, arg0, arg1, arg2, arg3) ({ \ 22 register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0); \ 23 register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1); \ 24 register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2); \ 25 register uintptr_t a3 asm ("a3") = (uintptr_t)(arg3); \ 26 register uintptr_t a7 asm ("a7") = (uintptr_t)(which); \ 27 asm volatile ("ecall" \ 28 : "+r" (a0) \ 29 : "r" (a1), "r" (a2), "r" (a3), "r" (a7) \ 30 : "memory"); \ 31 a0; \ 32 }) 33 34 /* Lazy implementations until SBI is finalized */ 35 #define SBI_CALL_0(which) SBI_CALL(which, 0, 0, 0, 0) 36 #define SBI_CALL_1(which, arg0) SBI_CALL(which, arg0, 0, 0, 0) 37 #define SBI_CALL_2(which, arg0, arg1) SBI_CALL(which, arg0, arg1, 0, 0) 38 #define SBI_CALL_3(which, arg0, arg1, arg2) \ 39 SBI_CALL(which, arg0, arg1, arg2, 0) 40 #define SBI_CALL_4(which, arg0, arg1, arg2, arg3) \ 41 SBI_CALL(which, arg0, arg1, arg2, arg3) 42 43 static inline void sbi_console_putchar(int ch) 44 { 45 SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch); 46 } 47 48 static inline int sbi_console_getchar(void) 49 { 50 return SBI_CALL_0(SBI_CONSOLE_GETCHAR); 51 } 52 53 static inline void sbi_set_timer(uint64_t stime_value) 54 { 55 #if __riscv_xlen == 32 56 SBI_CALL_2(SBI_SET_TIMER, stime_value, stime_value >> 32); 57 #else 58 SBI_CALL_1(SBI_SET_TIMER, stime_value); 59 #endif 60 } 61 62 static inline void sbi_shutdown(void) 63 { 64 SBI_CALL_0(SBI_SHUTDOWN); 65 } 66 67 static inline void sbi_clear_ipi(void) 68 { 69 SBI_CALL_0(SBI_CLEAR_IPI); 70 } 71 72 static inline void sbi_send_ipi(const unsigned long *hart_mask) 73 { 74 SBI_CALL_1(SBI_SEND_IPI, hart_mask); 75 } 76 77 static inline void sbi_remote_fence_i(const unsigned long *hart_mask) 78 { 79 SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask); 80 } 81 82 static inline void sbi_remote_sfence_vma(const unsigned long *hart_mask, 83 unsigned long start, 84 unsigned long size) 85 { 86 SBI_CALL_3(SBI_REMOTE_SFENCE_VMA, hart_mask, start, size); 87 } 88 89 static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, 90 unsigned long start, 91 unsigned long size, 92 unsigned long asid) 93 { 94 SBI_CALL_4(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask, start, size, asid); 95 } 96 97 #endif 98