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 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 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA, 55 SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID, 56 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA, 57 SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID, 58 }; 59 60 enum sbi_ext_hsm_fid { 61 SBI_EXT_HSM_HART_START = 0, 62 SBI_EXT_HSM_HART_STOP, 63 SBI_EXT_HSM_HART_STATUS, 64 }; 65 66 enum sbi_hsm_hart_status { 67 SBI_HSM_HART_STATUS_STARTED = 0, 68 SBI_HSM_HART_STATUS_STOPPED, 69 SBI_HSM_HART_STATUS_START_PENDING, 70 SBI_HSM_HART_STATUS_STOP_PENDING, 71 }; 72 73 #define SBI_SPEC_VERSION_DEFAULT 0x1 74 #define SBI_SPEC_VERSION_MAJOR_SHIFT 24 75 #define SBI_SPEC_VERSION_MAJOR_MASK 0x7f 76 #define SBI_SPEC_VERSION_MINOR_MASK 0xffffff 77 78 /* SBI return error codes */ 79 #define SBI_SUCCESS 0 80 #define SBI_ERR_FAILURE -1 81 #define SBI_ERR_NOT_SUPPORTED -2 82 #define SBI_ERR_INVALID_PARAM -3 83 #define SBI_ERR_DENIED -4 84 #define SBI_ERR_INVALID_ADDRESS -5 85 86 extern unsigned long sbi_spec_version; 87 struct sbiret { 88 long error; 89 long value; 90 }; 91 92 void sbi_init(void); 93 struct sbiret sbi_ecall(int ext, int fid, unsigned long arg0, 94 unsigned long arg1, unsigned long arg2, 95 unsigned long arg3, unsigned long arg4, 96 unsigned long arg5); 97 98 void sbi_console_putchar(int ch); 99 int sbi_console_getchar(void); 100 void sbi_set_timer(uint64_t stime_value); 101 void sbi_shutdown(void); 102 void sbi_clear_ipi(void); 103 int sbi_send_ipi(const unsigned long *hart_mask); 104 int sbi_remote_fence_i(const unsigned long *hart_mask); 105 int sbi_remote_sfence_vma(const unsigned long *hart_mask, 106 unsigned long start, 107 unsigned long size); 108 109 int sbi_remote_sfence_vma_asid(const unsigned long *hart_mask, 110 unsigned long start, 111 unsigned long size, 112 unsigned long asid); 113 int sbi_remote_hfence_gvma(const unsigned long *hart_mask, 114 unsigned long start, 115 unsigned long size); 116 int sbi_remote_hfence_gvma_vmid(const unsigned long *hart_mask, 117 unsigned long start, 118 unsigned long size, 119 unsigned long vmid); 120 int sbi_remote_hfence_vvma(const unsigned long *hart_mask, 121 unsigned long start, 122 unsigned long size); 123 int sbi_remote_hfence_vvma_asid(const unsigned long *hart_mask, 124 unsigned long start, 125 unsigned long size, 126 unsigned long asid); 127 int sbi_probe_extension(int ext); 128 129 /* Check if current SBI specification version is 0.1 or not */ 130 static inline int sbi_spec_is_0_1(void) 131 { 132 return (sbi_spec_version == SBI_SPEC_VERSION_DEFAULT) ? 1 : 0; 133 } 134 135 /* Get the major version of SBI */ 136 static inline unsigned long sbi_major_version(void) 137 { 138 return (sbi_spec_version >> SBI_SPEC_VERSION_MAJOR_SHIFT) & 139 SBI_SPEC_VERSION_MAJOR_MASK; 140 } 141 142 /* Get the minor version of SBI */ 143 static inline unsigned long sbi_minor_version(void) 144 { 145 return sbi_spec_version & SBI_SPEC_VERSION_MINOR_MASK; 146 } 147 148 int sbi_err_map_linux_errno(int err); 149 #else /* CONFIG_RISCV_SBI */ 150 static inline int sbi_remote_fence_i(const unsigned long *hart_mask) { return -1; } 151 static inline void sbi_init(void) {} 152 #endif /* CONFIG_RISCV_SBI */ 153 #endif /* _ASM_RISCV_SBI_H */ 154