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 #ifdef CONFIG_RISCV_SBI 12 #define SBI_SET_TIMER 0 13 #define SBI_CONSOLE_PUTCHAR 1 14 #define SBI_CONSOLE_GETCHAR 2 15 #define SBI_CLEAR_IPI 3 16 #define SBI_SEND_IPI 4 17 #define SBI_REMOTE_FENCE_I 5 18 #define SBI_REMOTE_SFENCE_VMA 6 19 #define SBI_REMOTE_SFENCE_VMA_ASID 7 20 #define SBI_SHUTDOWN 8 21 22 #define SBI_CALL(which, arg0, arg1, arg2, arg3) ({ \ 23 register uintptr_t a0 asm ("a0") = (uintptr_t)(arg0); \ 24 register uintptr_t a1 asm ("a1") = (uintptr_t)(arg1); \ 25 register uintptr_t a2 asm ("a2") = (uintptr_t)(arg2); \ 26 register uintptr_t a3 asm ("a3") = (uintptr_t)(arg3); \ 27 register uintptr_t a7 asm ("a7") = (uintptr_t)(which); \ 28 asm volatile ("ecall" \ 29 : "+r" (a0) \ 30 : "r" (a1), "r" (a2), "r" (a3), "r" (a7) \ 31 : "memory"); \ 32 a0; \ 33 }) 34 35 /* Lazy implementations until SBI is finalized */ 36 #define SBI_CALL_0(which) SBI_CALL(which, 0, 0, 0, 0) 37 #define SBI_CALL_1(which, arg0) SBI_CALL(which, arg0, 0, 0, 0) 38 #define SBI_CALL_2(which, arg0, arg1) SBI_CALL(which, arg0, arg1, 0, 0) 39 #define SBI_CALL_3(which, arg0, arg1, arg2) \ 40 SBI_CALL(which, arg0, arg1, arg2, 0) 41 #define SBI_CALL_4(which, arg0, arg1, arg2, arg3) \ 42 SBI_CALL(which, arg0, arg1, arg2, arg3) 43 44 static inline void sbi_console_putchar(int ch) 45 { 46 SBI_CALL_1(SBI_CONSOLE_PUTCHAR, ch); 47 } 48 49 static inline int sbi_console_getchar(void) 50 { 51 return SBI_CALL_0(SBI_CONSOLE_GETCHAR); 52 } 53 54 static inline void sbi_set_timer(uint64_t stime_value) 55 { 56 #if __riscv_xlen == 32 57 SBI_CALL_2(SBI_SET_TIMER, stime_value, stime_value >> 32); 58 #else 59 SBI_CALL_1(SBI_SET_TIMER, stime_value); 60 #endif 61 } 62 63 static inline void sbi_shutdown(void) 64 { 65 SBI_CALL_0(SBI_SHUTDOWN); 66 } 67 68 static inline void sbi_clear_ipi(void) 69 { 70 SBI_CALL_0(SBI_CLEAR_IPI); 71 } 72 73 static inline void sbi_send_ipi(const unsigned long *hart_mask) 74 { 75 SBI_CALL_1(SBI_SEND_IPI, hart_mask); 76 } 77 78 static inline void sbi_remote_fence_i(const unsigned long *hart_mask) 79 { 80 SBI_CALL_1(SBI_REMOTE_FENCE_I, hart_mask); 81 } 82 83 static inline void sbi_remote_sfence_vma(const unsigned long *hart_mask, 84 unsigned long start, 85 unsigned long size) 86 { 87 SBI_CALL_3(SBI_REMOTE_SFENCE_VMA, hart_mask, start, size); 88 } 89 90 static inline void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, 91 unsigned long start, 92 unsigned long size, 93 unsigned long asid) 94 { 95 SBI_CALL_4(SBI_REMOTE_SFENCE_VMA_ASID, hart_mask, start, size, asid); 96 } 97 #else /* CONFIG_RISCV_SBI */ 98 /* stubs for code that is only reachable under IS_ENABLED(CONFIG_RISCV_SBI): */ 99 void sbi_set_timer(uint64_t stime_value); 100 void sbi_clear_ipi(void); 101 void sbi_send_ipi(const unsigned long *hart_mask); 102 void sbi_remote_fence_i(const unsigned long *hart_mask); 103 #endif /* CONFIG_RISCV_SBI */ 104 #endif /* _ASM_RISCV_SBI_H */ 105