1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 Regents of the University of California 4 * Copyright (c) 2020 Western Digital Corporation or its affiliates. 5 */ 6 7 #ifndef _ASM_RISCV_SBI_H 8 #define _ASM_RISCV_SBI_H 9 10 #include <linux/types.h> 11 12 #ifdef CONFIG_RISCV_SBI 13 enum sbi_ext_id { 14 #ifdef CONFIG_RISCV_SBI_V01 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 #endif 25 SBI_EXT_BASE = 0x10, 26 SBI_EXT_TIME = 0x54494D45, 27 SBI_EXT_IPI = 0x735049, 28 SBI_EXT_RFENCE = 0x52464E43, 29 SBI_EXT_HSM = 0x48534D, 30 31 /* Experimentals extensions must lie within this range */ 32 SBI_EXT_EXPERIMENTAL_START = 0x08000000, 33 SBI_EXT_EXPERIMENTAL_END = 0x08FFFFFF, 34 35 /* Vendor extensions must lie within this range */ 36 SBI_EXT_VENDOR_START = 0x09000000, 37 SBI_EXT_VENDOR_END = 0x09FFFFFF, 38 }; 39 40 enum sbi_ext_base_fid { 41 SBI_EXT_BASE_GET_SPEC_VERSION = 0, 42 SBI_EXT_BASE_GET_IMP_ID, 43 SBI_EXT_BASE_GET_IMP_VERSION, 44 SBI_EXT_BASE_PROBE_EXT, 45 SBI_EXT_BASE_GET_MVENDORID, 46 SBI_EXT_BASE_GET_MARCHID, 47 SBI_EXT_BASE_GET_MIMPID, 48 }; 49 50 enum sbi_ext_time_fid { 51 SBI_EXT_TIME_SET_TIMER = 0, 52 }; 53 54 enum sbi_ext_ipi_fid { 55 SBI_EXT_IPI_SEND_IPI = 0, 56 }; 57 58 enum sbi_ext_rfence_fid { 59 SBI_EXT_RFENCE_REMOTE_FENCE_I = 0, 60 SBI_EXT_RFENCE_REMOTE_SFENCE_VMA, 61 SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID, 62 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID, 63 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA, 64 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID, 65 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA, 66 }; 67 68 enum sbi_ext_hsm_fid { 69 SBI_EXT_HSM_HART_START = 0, 70 SBI_EXT_HSM_HART_STOP, 71 SBI_EXT_HSM_HART_STATUS, 72 }; 73 74 enum sbi_hsm_hart_status { 75 SBI_HSM_HART_STATUS_STARTED = 0, 76 SBI_HSM_HART_STATUS_STOPPED, 77 SBI_HSM_HART_STATUS_START_PENDING, 78 SBI_HSM_HART_STATUS_STOP_PENDING, 79 }; 80 81 #define SBI_SPEC_VERSION_DEFAULT 0x1 82 #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 83 #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f 84 #define SBI_SPEC_VERSION_MINOR_MASK 0xffffff 85 86 /* SBI return error codes */ 87 #define SBI_SUCCESS 0 88 #define SBI_ERR_FAILURE -1 89 #define SBI_ERR_NOT_SUPPORTED -2 90 #define SBI_ERR_INVALID_PARAM -3 91 #define SBI_ERR_DENIED -4 92 #define SBI_ERR_INVALID_ADDRESS -5 93 #define SBI_ERR_ALREADY_AVAILABLE -6 94 95 extern unsigned long sbi_spec_version; 96 struct sbiret { 97 long error; 98 long value; 99 }; 100 101 void sbi_init(void); 102 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, 103 unsigned long arg1, unsigned long arg2, 104 unsigned long arg3, unsigned long arg4, 105 unsigned long arg5); 106 107 void sbi_console_putchar(int ch); 108 int sbi_console_getchar(void); 109 long sbi_get_mvendorid(void); 110 long sbi_get_marchid(void); 111 long sbi_get_mimpid(void); 112 void sbi_set_timer(uint64_t stime_value); 113 void sbi_shutdown(void); 114 void sbi_clear_ipi(void); 115 int sbi_send_ipi(const unsigned long *hart_mask); 116 int sbi_remote_fence_i(const unsigned long *hart_mask); 117 int sbi_remote_sfence_vma(const unsigned long *hart_mask, 118 unsigned long start, 119 unsigned long size); 120 121 int sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, 122 unsigned long start, 123 unsigned long size, 124 unsigned long asid); 125 int sbi_remote_hfence_gvma(const unsigned long *hart_mask, 126 unsigned long start, 127 unsigned long size); 128 int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask, 129 unsigned long start, 130 unsigned long size, 131 unsigned long vmid); 132 int sbi_remote_hfence_vvma(const unsigned long *hart_mask, 133 unsigned long start, 134 unsigned long size); 135 int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask, 136 unsigned long start, 137 unsigned long size, 138 unsigned long asid); 139 int sbi_probe_extension(int ext); 140 141 /* Check if current SBI specification version is 0.1 or not */ 142 static inline int sbi_spec_is_0_1(void) 143 { 144 return (sbi_spec_version == SBI_SPEC_VERSION_DEFAULT) ? 1 : 0; 145 } 146 147 /* Get the major version of SBI */ 148 static inline unsigned long sbi_major_version(void) 149 { 150 return (sbi_spec_version >> SBI_SPEC_VERSION_MAJOR_SHIFT) & 151 SBI_SPEC_VERSION_MAJOR_MASK; 152 } 153 154 /* Get the minor version of SBI */ 155 static inline unsigned long sbi_minor_version(void) 156 { 157 return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK; 158 } 159 160 int sbi_err_map_linux_errno(int err); 161 #else /* CONFIG_RISCV_SBI */ 162 static inline int sbi_remote_fence_i(const unsigned long *hart_mask) { return -1; } 163 static inline void sbi_init(void) {} 164 #endif /* CONFIG_RISCV_SBI */ 165 #endif /* _ASM_RISCV_SBI_H */ 166