arch/riscv/include/asm/sbi.h

   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