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 #define SBI_SPEC_VERSION_DEFAULT        0x1
  57 #define SBI_SPEC_VERSION_MAJOR_SHIFT    24
  58 #define SBI_SPEC_VERSION_MAJOR_MASK     0x7f
  59 #define SBI_SPEC_VERSION_MINOR_MASK     0xffffff
  60
  61 /* SBI return error codes */
  62 #define SBI_SUCCESS                     0
  63 #define SBI_ERR_FAILURE                 -1
  64 #define SBI_ERR_NOT_SUPPORTED           -2
  65 #define SBI_ERR_INVALID_PARAM           -3
  66 #define SBI_ERR_DENIED                  -4
  67 #define SBI_ERR_INVALID_ADDRESS         -5
  68
  69 extern unsigned long sbi_spec_version;
  70 struct sbiret {
  71         long error;
  72         long value;
  73 };
  74
  75 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0,
  76                         unsigned long arg1, unsigned long arg2,
  77                         unsigned long arg3, unsigned long arg4,
  78                         unsigned long arg5);
  79
  80 #ifdef CONFIG_SBI_V01
  81 void sbi_console_putchar(int ch);
  82 int sbi_console_getchar(void);
  83 void sbi_clear_ipi(void);
  84 void sbi_shutdown(void);
  85 #endif
  86 void sbi_set_timer(uint64_t stime_value);
  87 void sbi_send_ipi(const unsigned long *hart_mask);
  88 void sbi_remote_fence_i(const unsigned long *hart_mask);
  89 void sbi_remote_sfence_vma(const unsigned long *hart_mask,
  90                            unsigned long start,
  91                            unsigned long size);
  92 void sbi_remote_sfence_vma_asid(const unsigned long *hart_mask,
  93                                 unsigned long start,
  94                                 unsigned long size,
  95                                 unsigned long asid);
  96
  97 int sbi_probe_extension(int ext);
  98
  99 #endif