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