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