arch/riscv/include/asm/sbi.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (C) 2015 Regents of the University of California
   4  * Copyright (c) 2020 Western Digital Corporation or its affiliates.
   5  *
   6  * Taken from Linux arch/riscv/include/asm/sbi.h
   7  */
   8
   9 #ifndef _ASM_RISCV_SBI_H
  10 #define _ASM_RISCV_SBI_H
  11
  12 #include <linux/types.h>
  13
  14 enum sbi_ext_id {
  15 #ifdef CONFIG_SBI_V01
  16         SBI_EXT_0_1_SET_TIMER = 0x0,
  17         SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
  18         SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
  19         SBI_EXT_0_1_CLEAR_IPI = 0x3,
  20         SBI_EXT_0_1_SEND_IPI = 0x4,
  21         SBI_EXT_0_1_REMOTE_FENCE_I = 0x5,
  22         SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
  23         SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
  24         SBI_EXT_0_1_SHUTDOWN = 0x8,
  25 #endif
  26         SBI_EXT_BASE = 0x10,
  27         SBI_EXT_TIME = 0x54494D45,
  28         SBI_EXT_IPI = 0x735049,
  29         SBI_EXT_RFENCE = 0x52464E43,
  30 };
  31
  32 enum sbi_ext_base_fid {
  33         SBI_EXT_BASE_GET_SPEC_VERSION = 0,
  34         SBI_EXT_BASE_GET_IMP_ID,
  35         SBI_EXT_BASE_GET_IMP_VERSION,
  36         SBI_EXT_BASE_PROBE_EXT,
  37         SBI_EXT_BASE_GET_MVENDORID,
  38         SBI_EXT_BASE_GET_MARCHID,
  39         SBI_EXT_BASE_GET_MIMPID,
  40 };
  41
  42 enum sbi_ext_time_fid {
  43         SBI_EXT_TIME_SET_TIMER = 0,
  44 };
  45
  46 enum sbi_ext_ipi_fid {
  47         SBI_EXT_IPI_SEND_IPI = 0,
  48 };
  49
  50 enum sbi_ext_rfence_fid {
  51         SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
  52         SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
  53         SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
  54 };
  55
  56 #ifdef CONFIG_SBI_V01
  57 #define SBI_EXT_SET_TIMER               SBI_EXT_0_1_SET_TIMER
  58 #define SBI_FID_SET_TIMER               0
  59 #define SBI_EXT_SEND_IPI                SBI_EXT_0_1_SEND_IPI
  60 #define SBI_FID_SEND_IPI                0
  61 #define SBI_EXT_REMOTE_FENCE_I          SBI_EXT_0_1_REMOTE_FENCE_I
  62 #define SBI_FID_REMOTE_FENCE_I          0
  63 #define SBI_EXT_REMOTE_SFENCE_VMA       SBI_EXT_0_1_REMOTE_SFENCE_VMA
  64 #define SBI_FID_REMOTE_SFENCE_VMA       0
  65 #define SBI_EXT_REMOTE_SFENCE_VMA_ASID  SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID
  66 #define SBI_FID_REMOTE_SFENCE_VMA_ASID  0
  67 #else
  68 #define SBI_EXT_SET_TIMER               SBI_EXT_TIME
  69 #define SBI_FID_SET_TIMER               SBI_EXT_TIME_SET_TIMER
  70 #define SBI_EXT_SEND_IPI                SBI_EXT_IPI
  71 #define SBI_FID_SEND_IPI                SBI_EXT_IPI_SEND_IPI
  72 #define SBI_EXT_REMOTE_FENCE_I          SBI_EXT_RFENCE
  73 #define SBI_FID_REMOTE_FENCE_I          SBI_EXT_RFENCE_REMOTE_FENCE_I
  74 #define SBI_EXT_REMOTE_SFENCE_VMA       SBI_EXT_RFENCE
  75 #define SBI_FID_REMOTE_SFENCE_VMA       SBI_EXT_RFENCE_REMOTE_SFENCE_VMA
  76 #define SBI_EXT_REMOTE_SFENCE_VMA_ASID  SBI_EXT_RFENCE
  77 #define SBI_FID_REMOTE_SFENCE_VMA_ASID  SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID
  78 #endif
  79
  80 #define SBI_SPEC_VERSION_DEFAULT        0x1
  81 #define SBI_SPEC_VERSION_MAJOR_SHIFT    24
  82 #define SBI_SPEC_VERSION_MAJOR_MASK     0x7f
  83 #define SBI_SPEC_VERSION_MINOR_MASK     0xffffff
  84
  85 /* SBI return error codes */
  86 #define SBI_SUCCESS                     0
  87 #define SBI_ERR_FAILURE                 -1
  88 #define SBI_ERR_NOT_SUPPORTED           -2
  89 #define SBI_ERR_INVALID_PARAM           -3
  90 #define SBI_ERR_DENIED                  -4
  91 #define SBI_ERR_INVALID_ADDRESS         -5
  92
  93 extern unsigned long sbi_spec_version;
  94 struct sbiret {
  95         long error;
  96         long value;
  97 };
  98
  99 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
 100                         unsigned long arg1, unsigned long arg2,
 101                         unsigned long arg3, unsigned long arg4,
 102                         unsigned long arg5);
 103
 104 #ifdef CONFIG_SBI_V01
 105 void sbi_console_putchar(int ch);
 106 int sbi_console_getchar(void);
 107 void sbi_clear_ipi(void);
 108 void sbi_shutdown(void);
 109 void sbi_send_ipi(const unsigned long *hart_mask);
 110 void sbi_remote_fence_i(const unsigned long *hart_mask);
 111 void sbi_remote_sfence_vma(const unsigned long *hart_mask,
 112                            unsigned long start,
 113                            unsigned long size);
 114 void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
 115                                 unsigned long start,
 116                                 unsigned long size,
 117                                 unsigned long asid);
 118 #endif
 119 void sbi_set_timer(uint64_t stime_value);
 120 int sbi_probe_extension(int ext);
 121
 122 #endif