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         SBI_EXT_0_1_SET_TIMER = 0x0,
  16         SBI_EXT_0_1_CONSOLE_PUTCHAR = 0x1,
  17         SBI_EXT_0_1_CONSOLE_GETCHAR = 0x2,
  18         SBI_EXT_0_1_CLEAR_IPI = 0x3,
  19         SBI_EXT_0_1_SEND_IPI = 0x4,
  20         SBI_EXT_0_1_REMOTE_FENCE_I = 0x5,
  21         SBI_EXT_0_1_REMOTE_SFENCE_VMA = 0x6,
  22         SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID = 0x7,
  23         SBI_EXT_0_1_SHUTDOWN = 0x8,
  24         SBI_EXT_BASE = 0x10,
  25         SBI_EXT_TIME = 0x54494D45,
  26         SBI_EXT_IPI = 0x735049,
  27         SBI_EXT_RFENCE = 0x52464E43,
  28 };
  29
  30 enum sbi_ext_base_fid {
  31         SBI_EXT_BASE_GET_SPEC_VERSION = 0,
  32         SBI_EXT_BASE_GET_IMP_ID,
  33         SBI_EXT_BASE_GET_IMP_VERSION,
  34         SBI_EXT_BASE_PROBE_EXT,
  35         SBI_EXT_BASE_GET_MVENDORID,
  36         SBI_EXT_BASE_GET_MARCHID,
  37         SBI_EXT_BASE_GET_MIMPID,
  38 };
  39
  40 enum sbi_ext_time_fid {
  41         SBI_EXT_TIME_SET_TIMER = 0,
  42 };
  43
  44 enum sbi_ext_ipi_fid {
  45         SBI_EXT_IPI_SEND_IPI = 0,
  46 };
  47
  48 enum sbi_ext_rfence_fid {
  49         SBI_EXT_RFENCE_REMOTE_FENCE_I = 0,
  50         SBI_EXT_RFENCE_REMOTE_SFENCE_VMA,
  51         SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID,
  52 };
  53
  54 #define SBI_SPEC_VERSION_DEFAULT        0x1
  55 #define SBI_SPEC_VERSION_MAJOR_SHIFT    24
  56 #define SBI_SPEC_VERSION_MAJOR_MASK     0x7f
  57 #define SBI_SPEC_VERSION_MINOR_MASK     0xffffff
  58
  59 /* SBI return error codes */
  60 #define SBI_SUCCESS                     0
  61 #define SBI_ERR_FAILURE                 -1
  62 #define SBI_ERR_NOT_SUPPORTED           -2
  63 #define SBI_ERR_INVALID_PARAM           -3
  64 #define SBI_ERR_DENIED                  -4
  65 #define SBI_ERR_INVALID_ADDRESS         -5
  66
  67 extern unsigned long sbi_spec_version;
  68 struct sbiret {
  69         long error;
  70         long value;
  71 };
  72
  73 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
  74                         unsigned long arg1, unsigned long arg2,
  75                         unsigned long arg3, unsigned long arg4,
  76                         unsigned long arg5);
  77
  78 void sbi_console_putchar(int ch);
  79 int sbi_console_getchar(void);
  80 void sbi_clear_ipi(void);
  81 void sbi_shutdown(void);
  82 void sbi_set_timer(uint64_t stime_value);
  83 void sbi_send_ipi(const unsigned long *hart_mask);
  84 void sbi_remote_fence_i(const unsigned long *hart_mask);
  85 void sbi_remote_sfence_vma(const unsigned long *hart_mask,
  86                            unsigned long start,
  87                            unsigned long size);
  88 void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
  89                                 unsigned long start,
  90                                 unsigned long size,
  91                                 unsigned long asid);
  92
  93 int sbi_probe_extension(int ext);
  94
  95 #endif