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 #include <linux/cpumask.h> 12 13 #ifdef CONFIG_RISCV_SBI 14 enum sbi_ext_id { 15 #ifdef CONFIG_RISCV_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 SBI_EXT_HSM = 0x48534D, 31 SBI_EXT_SRST = 0x53525354, 32 33 /* Experimentals extensions must lie within this range */ 34 SBI_EXT_EXPERIMENTAL_START = 0x08000000, 35 SBI_EXT_EXPERIMENTAL_END = 0x08FFFFFF, 36 37 /* Vendor extensions must lie within this range */ 38 SBI_EXT_VENDOR_START = 0x09000000, 39 SBI_EXT_VENDOR_END = 0x09FFFFFF, 40 }; 41 42 enum sbi_ext_base_fid { 43 SBI_EXT_BASE_GET_SPEC_VERSION = 0, 44 SBI_EXT_BASE_GET_IMP_ID, 45 SBI_EXT_BASE_GET_IMP_VERSION, 46 SBI_EXT_BASE_PROBE_EXT, 47 SBI_EXT_BASE_GET_MVENDORID, 48 SBI_EXT_BASE_GET_MARCHID, 49 SBI_EXT_BASE_GET_MIMPID, 50 }; 51 52 enum sbi_ext_time_fid { 53 SBI_EXT_TIME_SET_TIMER = 0, 54 }; 55 56 enum sbi_ext_ipi_fid { 57 SBI_EXT_IPI_SEND_IPI = 0, 58 }; 59 60 enum sbi_ext_rfence_fid { 61 SBI_EXT_RFENCE_REMOTE_FENCE_I = 0, 62 SBI_EXT_RFENCE_REMOTE_SFENCE_VMA, 63 SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID, 64 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID, 65 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA, 66 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID, 67 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA, 68 }; 69 70 enum sbi_ext_hsm_fid { 71 SBI_EXT_HSM_HART_START = 0, 72 SBI_EXT_HSM_HART_STOP, 73 SBI_EXT_HSM_HART_STATUS, 74 }; 75 76 enum sbi_hsm_hart_status { 77 SBI_HSM_HART_STATUS_STARTED = 0, 78 SBI_HSM_HART_STATUS_STOPPED, 79 SBI_HSM_HART_STATUS_START_PENDING, 80 SBI_HSM_HART_STATUS_STOP_PENDING, 81 }; 82 83 enum sbi_ext_srst_fid { 84 SBI_EXT_SRST_RESET = 0, 85 }; 86 87 enum sbi_srst_reset_type { 88 SBI_SRST_RESET_TYPE_SHUTDOWN = 0, 89 SBI_SRST_RESET_TYPE_COLD_REBOOT, 90 SBI_SRST_RESET_TYPE_WARM_REBOOT, 91 }; 92 93 enum sbi_srst_reset_reason { 94 SBI_SRST_RESET_REASON_NONE = 0, 95 SBI_SRST_RESET_REASON_SYS_FAILURE, 96 }; 97 98 #define SBI_SPEC_VERSION_DEFAULT 0x1 99 #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 100 #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f 101 #define SBI_SPEC_VERSION_MINOR_MASK 0xffffff 102 103 /* SBI return error codes */ 104 #define SBI_SUCCESS 0 105 #define SBI_ERR_FAILURE -1 106 #define SBI_ERR_NOT_SUPPORTED -2 107 #define SBI_ERR_INVALID_PARAM -3 108 #define SBI_ERR_DENIED -4 109 #define SBI_ERR_INVALID_ADDRESS -5 110 #define SBI_ERR_ALREADY_AVAILABLE -6 111 112 extern unsigned long sbi_spec_version; 113 struct sbiret { 114 long error; 115 long value; 116 }; 117 118 void sbi_init(void); 119 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, 120 unsigned long arg1, unsigned long arg2, 121 unsigned long arg3, unsigned long arg4, 122 unsigned long arg5); 123 124 void sbi_console_putchar(int ch); 125 int sbi_console_getchar(void); 126 long sbi_get_mvendorid(void); 127 long sbi_get_marchid(void); 128 long sbi_get_mimpid(void); 129 void sbi_set_timer(uint64_t stime_value); 130 void sbi_shutdown(void); 131 void sbi_clear_ipi(void); 132 int sbi_send_ipi(const struct cpumask *cpu_mask); 133 int sbi_remote_fence_i(const struct cpumask *cpu_mask); 134 int sbi_remote_sfence_vma(const struct cpumask *cpu_mask, 135 unsigned long start, 136 unsigned long size); 137 138 int sbi_remote_sfence_vma_asid(const struct cpumask *cpu_mask, 139 unsigned long start, 140 unsigned long size, 141 unsigned long asid); 142 int sbi_remote_hfence_gvma(const struct cpumask *cpu_mask, 143 unsigned long start, 144 unsigned long size); 145 int sbi_remote_hfence_gvma_vmid(const struct cpumask *cpu_mask, 146 unsigned long start, 147 unsigned long size, 148 unsigned long vmid); 149 int sbi_remote_hfence_vvma(const struct cpumask *cpu_mask, 150 unsigned long start, 151 unsigned long size); 152 int sbi_remote_hfence_vvma_asid(const struct cpumask *cpu_mask, 153 unsigned long start, 154 unsigned long size, 155 unsigned long asid); 156 int sbi_probe_extension(int ext); 157 158 /* Check if current SBI specification version is 0.1 or not */ 159 static inline int sbi_spec_is_0_1(void) 160 { 161 return (sbi_spec_version == SBI_SPEC_VERSION_DEFAULT) ? 1 : 0; 162 } 163 164 /* Get the major version of SBI */ 165 static inline unsigned long sbi_major_version(void) 166 { 167 return (sbi_spec_version >> SBI_SPEC_VERSION_MAJOR_SHIFT) & 168 SBI_SPEC_VERSION_MAJOR_MASK; 169 } 170 171 /* Get the minor version of SBI */ 172 static inline unsigned long sbi_minor_version(void) 173 { 174 return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK; 175 } 176 177 /* Make SBI version */ 178 static inline unsigned long sbi_mk_version(unsigned long major, 179 unsigned long minor) 180 { 181 return ((major & SBI_SPEC_VERSION_MAJOR_MASK) << 182 SBI_SPEC_VERSION_MAJOR_SHIFT) | minor; 183 } 184 185 int sbi_err_map_linux_errno(int err); 186 #else /* CONFIG_RISCV_SBI */ 187 static inline int sbi_remote_fence_i(const struct cpumask *cpu_mask) { return -1; } 188 static inline void sbi_init(void) {} 189 #endif /* CONFIG_RISCV_SBI */ 190 #endif /* _ASM_RISCV_SBI_H */ 191