1 /*- 2 * Copyright (c) 2016-2017 Ruslan Bukin <br@bsdpad.com> 3 * All rights reserved. 4 * 5 * Portions of this software were developed by SRI International and the 6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract 7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme. 8 * 9 * Portions of this software were developed by the University of Cambridge 10 * Computer Laboratory as part of the CTSRD Project, with support from the 11 * UK Higher Education Innovation Fund (HEIF). 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * $FreeBSD$ 35 */ 36 37 #ifndef _MACHINE_SBI_H_ 38 #define _MACHINE_SBI_H_ 39 40 #define SBI_SET_TIMER 0 41 #define SBI_CONSOLE_PUTCHAR 1 42 #define SBI_CONSOLE_GETCHAR 2 43 #define SBI_CLEAR_IPI 3 44 #define SBI_SEND_IPI 4 45 #define SBI_REMOTE_FENCE_I 5 46 #define SBI_REMOTE_SFENCE_VMA 6 47 #define SBI_REMOTE_SFENCE_VMA_ASID 7 48 #define SBI_SHUTDOWN 8 49 50 /* 51 * Documentation available at 52 * https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.md 53 */ 54 55 static __inline uint64_t 56 sbi_call(uint64_t arg7, uint64_t arg0, uint64_t arg1, uint64_t arg2, 57 uint64_t arg3) 58 { 59 register uintptr_t a0 __asm ("a0") = (uintptr_t)(arg0); 60 register uintptr_t a1 __asm ("a1") = (uintptr_t)(arg1); 61 register uintptr_t a2 __asm ("a2") = (uintptr_t)(arg2); 62 register uintptr_t a3 __asm ("a3") = (uintptr_t)(arg3); 63 register uintptr_t a7 __asm ("a7") = (uintptr_t)(arg7); 64 65 __asm __volatile( \ 66 "ecall" \ 67 :"+r"(a0) \ 68 :"r"(a1), "r"(a2), "r" (a3), "r"(a7) \ 69 :"memory"); 70 71 return (a0); 72 } 73 74 static __inline void 75 sbi_console_putchar(int ch) 76 { 77 78 sbi_call(SBI_CONSOLE_PUTCHAR, ch, 0, 0, 0); 79 } 80 81 static __inline int 82 sbi_console_getchar(void) 83 { 84 85 return (sbi_call(SBI_CONSOLE_GETCHAR, 0, 0, 0, 0)); 86 } 87 88 static __inline void 89 sbi_set_timer(uint64_t val) 90 { 91 92 sbi_call(SBI_SET_TIMER, val, 0, 0, 0); 93 } 94 95 static __inline void 96 sbi_shutdown(void) 97 { 98 99 sbi_call(SBI_SHUTDOWN, 0, 0, 0, 0); 100 } 101 102 static __inline void 103 sbi_clear_ipi(void) 104 { 105 106 sbi_call(SBI_CLEAR_IPI, 0, 0, 0, 0); 107 } 108 109 static __inline void 110 sbi_send_ipi(const unsigned long *hart_mask) 111 { 112 113 sbi_call(SBI_SEND_IPI, (uint64_t)hart_mask, 0, 0, 0); 114 } 115 116 static __inline void 117 sbi_remote_fence_i(const unsigned long *hart_mask) 118 { 119 120 sbi_call(SBI_REMOTE_FENCE_I, (uint64_t)hart_mask, 0, 0, 0); 121 } 122 123 static __inline void 124 sbi_remote_sfence_vma(const unsigned long *hart_mask, 125 unsigned long start, unsigned long size) 126 { 127 128 sbi_call(SBI_REMOTE_SFENCE_VMA, (uint64_t)hart_mask, start, size, 0); 129 } 130 131 static __inline void 132 sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, 133 unsigned long start, unsigned long size, 134 unsigned long asid) 135 { 136 137 sbi_call(SBI_REMOTE_SFENCE_VMA_ASID, (uint64_t)hart_mask, start, size, 138 asid); 139 } 140 141 #endif /* !_MACHINE_SBI_H_ */ 142