1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 #ifndef _ASMRISCV_CSR_H_ 3 #define _ASMRISCV_CSR_H_ 4 #include <linux/const.h> 5 6 #define CSR_SSTATUS 0x100 7 #define CSR_STVEC 0x105 8 #define CSR_SSCRATCH 0x140 9 #define CSR_SEPC 0x141 10 #define CSR_SCAUSE 0x142 11 #define CSR_STVAL 0x143 12 #define CSR_SATP 0x180 13 14 #define SR_SIE _AC(0x00000002, UL) 15 16 /* Exception cause high bit - is an interrupt if set */ 17 #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) 18 19 /* Exception causes */ 20 #define EXC_INST_MISALIGNED 0 21 #define EXC_INST_ACCESS 1 22 #define EXC_INST_ILLEGAL 2 23 #define EXC_BREAKPOINT 3 24 #define EXC_LOAD_MISALIGNED 4 25 #define EXC_LOAD_ACCESS 5 26 #define EXC_STORE_MISALIGNED 6 27 #define EXC_STORE_ACCESS 7 28 #define EXC_SYSCALL 8 29 #define EXC_HYPERVISOR_SYSCALL 9 30 #define EXC_SUPERVISOR_SYSCALL 10 31 #define EXC_INST_PAGE_FAULT 12 32 #define EXC_LOAD_PAGE_FAULT 13 33 #define EXC_STORE_PAGE_FAULT 15 34 #define EXC_INST_GUEST_PAGE_FAULT 20 35 #define EXC_LOAD_GUEST_PAGE_FAULT 21 36 #define EXC_VIRTUAL_INST_FAULT 22 37 #define EXC_STORE_GUEST_PAGE_FAULT 23 38 39 #ifndef __ASSEMBLY__ 40 41 #define csr_swap(csr, val) \ 42 ({ \ 43 unsigned long __v = (unsigned long)(val); \ 44 __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ 45 : "=r" (__v) : "rK" (__v) \ 46 : "memory"); \ 47 __v; \ 48 }) 49 50 #define csr_read(csr) \ 51 ({ \ 52 register unsigned long __v; \ 53 __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ 54 : "=r" (__v) : \ 55 : "memory"); \ 56 __v; \ 57 }) 58 59 #define csr_write(csr, val) \ 60 ({ \ 61 unsigned long __v = (unsigned long)(val); \ 62 __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ 63 : : "rK" (__v) \ 64 : "memory"); \ 65 }) 66 67 #define csr_read_set(csr, val) \ 68 ({ \ 69 unsigned long __v = (unsigned long)(val); \ 70 __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ 71 : "=r" (__v) : "rK" (__v) \ 72 : "memory"); \ 73 __v; \ 74 }) 75 76 #define csr_set(csr, val) \ 77 ({ \ 78 unsigned long __v = (unsigned long)(val); \ 79 __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ 80 : : "rK" (__v) \ 81 : "memory"); \ 82 }) 83 84 #define csr_read_clear(csr, val) \ 85 ({ \ 86 unsigned long __v = (unsigned long)(val); \ 87 __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ 88 : "=r" (__v) : "rK" (__v) \ 89 : "memory"); \ 90 __v; \ 91 }) 92 93 #define csr_clear(csr, val) \ 94 ({ \ 95 unsigned long __v = (unsigned long)(val); \ 96 __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ 97 : : "rK" (__v) \ 98 : "memory"); \ 99 }) 100 101 #endif /* !__ASSEMBLY__ */ 102 #endif /* _ASMRISCV_CSR_H_ */ 103