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