1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2015 Regents of the University of California 4 */ 5 6 #ifndef _ASM_RISCV_CSR_H 7 #define _ASM_RISCV_CSR_H 8 9 #include <asm/asm.h> 10 #include <linux/const.h> 11 12 /* Status register flags */ 13 #define SR_SIE _AC(0x00000002, UL) /* Supervisor Interrupt Enable */ 14 #define SR_SPIE _AC(0x00000020, UL) /* Previous Supervisor IE */ 15 #define SR_SPP _AC(0x00000100, UL) /* Previously Supervisor */ 16 #define SR_SUM _AC(0x00040000, UL) /* Supervisor User Memory Access */ 17 18 #define SR_FS _AC(0x00006000, UL) /* Floating-point Status */ 19 #define SR_FS_OFF _AC(0x00000000, UL) 20 #define SR_FS_INITIAL _AC(0x00002000, UL) 21 #define SR_FS_CLEAN _AC(0x00004000, UL) 22 #define SR_FS_DIRTY _AC(0x00006000, UL) 23 24 #define SR_XS _AC(0x00018000, UL) /* Extension Status */ 25 #define SR_XS_OFF _AC(0x00000000, UL) 26 #define SR_XS_INITIAL _AC(0x00008000, UL) 27 #define SR_XS_CLEAN _AC(0x00010000, UL) 28 #define SR_XS_DIRTY _AC(0x00018000, UL) 29 30 #ifndef CONFIG_64BIT 31 #define SR_SD _AC(0x80000000, UL) /* FS/XS dirty */ 32 #else 33 #define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */ 34 #endif 35 36 /* SATP flags */ 37 #ifndef CONFIG_64BIT 38 #define SATP_PPN _AC(0x003FFFFF, UL) 39 #define SATP_MODE_32 _AC(0x80000000, UL) 40 #define SATP_MODE SATP_MODE_32 41 #else 42 #define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL) 43 #define SATP_MODE_39 _AC(0x8000000000000000, UL) 44 #define SATP_MODE SATP_MODE_39 45 #endif 46 47 /* SCAUSE */ 48 #define SCAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) 49 50 #define IRQ_U_SOFT 0 51 #define IRQ_S_SOFT 1 52 #define IRQ_M_SOFT 3 53 #define IRQ_U_TIMER 4 54 #define IRQ_S_TIMER 5 55 #define IRQ_M_TIMER 7 56 #define IRQ_U_EXT 8 57 #define IRQ_S_EXT 9 58 #define IRQ_M_EXT 11 59 60 #define EXC_INST_MISALIGNED 0 61 #define EXC_INST_ACCESS 1 62 #define EXC_BREAKPOINT 3 63 #define EXC_LOAD_ACCESS 5 64 #define EXC_STORE_ACCESS 7 65 #define EXC_SYSCALL 8 66 #define EXC_INST_PAGE_FAULT 12 67 #define EXC_LOAD_PAGE_FAULT 13 68 #define EXC_STORE_PAGE_FAULT 15 69 70 /* SIE (Interrupt Enable) and SIP (Interrupt Pending) flags */ 71 #define SIE_SSIE (_AC(0x1, UL) << IRQ_S_SOFT) 72 #define SIE_STIE (_AC(0x1, UL) << IRQ_S_TIMER) 73 #define SIE_SEIE (_AC(0x1, UL) << IRQ_S_EXT) 74 75 #define CSR_CYCLE 0xc00 76 #define CSR_TIME 0xc01 77 #define CSR_INSTRET 0xc02 78 #define CSR_SSTATUS 0x100 79 #define CSR_SIE 0x104 80 #define CSR_STVEC 0x105 81 #define CSR_SCOUNTEREN 0x106 82 #define CSR_SSCRATCH 0x140 83 #define CSR_SEPC 0x141 84 #define CSR_SCAUSE 0x142 85 #define CSR_STVAL 0x143 86 #define CSR_SIP 0x144 87 #define CSR_SATP 0x180 88 #define CSR_CYCLEH 0xc80 89 #define CSR_TIMEH 0xc81 90 #define CSR_INSTRETH 0xc82 91 92 #ifndef __ASSEMBLY__ 93 94 #define csr_swap(csr, val) \ 95 ({ \ 96 unsigned long __v = (unsigned long)(val); \ 97 __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ 98 : "=r" (__v) : "rK" (__v) \ 99 : "memory"); \ 100 __v; \ 101 }) 102 103 #define csr_read(csr) \ 104 ({ \ 105 register unsigned long __v; \ 106 __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ 107 : "=r" (__v) : \ 108 : "memory"); \ 109 __v; \ 110 }) 111 112 #define csr_write(csr, val) \ 113 ({ \ 114 unsigned long __v = (unsigned long)(val); \ 115 __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ 116 : : "rK" (__v) \ 117 : "memory"); \ 118 }) 119 120 #define csr_read_set(csr, val) \ 121 ({ \ 122 unsigned long __v = (unsigned long)(val); \ 123 __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ 124 : "=r" (__v) : "rK" (__v) \ 125 : "memory"); \ 126 __v; \ 127 }) 128 129 #define csr_set(csr, val) \ 130 ({ \ 131 unsigned long __v = (unsigned long)(val); \ 132 __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ 133 : : "rK" (__v) \ 134 : "memory"); \ 135 }) 136 137 #define csr_read_clear(csr, val) \ 138 ({ \ 139 unsigned long __v = (unsigned long)(val); \ 140 __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ 141 : "=r" (__v) : "rK" (__v) \ 142 : "memory"); \ 143 __v; \ 144 }) 145 146 #define csr_clear(csr, val) \ 147 ({ \ 148 unsigned long __v = (unsigned long)(val); \ 149 __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ 150 : : "rK" (__v) \ 151 : "memory"); \ 152 }) 153 154 #endif /* __ASSEMBLY__ */ 155 156 #endif /* _ASM_RISCV_CSR_H */ 157
