1bd744d46SAndrew Jones /* SPDX-License-Identifier: GPL-2.0-only */ 2bd744d46SAndrew Jones #ifndef _ASMRISCV_CSR_H_ 3bd744d46SAndrew Jones #define _ASMRISCV_CSR_H_ 422f287f4SAndrew Jones #include <linux/const.h> 5bd744d46SAndrew Jones 6386561f8SAndrew Jones #define CSR_SSTATUS 0x100 7386561f8SAndrew Jones #define CSR_STVEC 0x105 8bd744d46SAndrew Jones #define CSR_SSCRATCH 0x140 9386561f8SAndrew Jones #define CSR_SEPC 0x141 10386561f8SAndrew Jones #define CSR_SCAUSE 0x142 11386561f8SAndrew Jones #define CSR_STVAL 0x143 12ad435a71SAndrew Jones #define CSR_SATP 0x180 13386561f8SAndrew Jones 14*a3c0b550SAndrew Jones #define SR_SIE _AC(0x00000002, UL) 15*a3c0b550SAndrew Jones 16386561f8SAndrew Jones /* Exception cause high bit - is an interrupt if set */ 17386561f8SAndrew Jones #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) 18386561f8SAndrew Jones 19386561f8SAndrew Jones /* Exception causes */ 20386561f8SAndrew Jones #define EXC_INST_MISALIGNED 0 21386561f8SAndrew Jones #define EXC_INST_ACCESS 1 22386561f8SAndrew Jones #define EXC_INST_ILLEGAL 2 23386561f8SAndrew Jones #define EXC_BREAKPOINT 3 24386561f8SAndrew Jones #define EXC_LOAD_MISALIGNED 4 25386561f8SAndrew Jones #define EXC_LOAD_ACCESS 5 26386561f8SAndrew Jones #define EXC_STORE_MISALIGNED 6 27386561f8SAndrew Jones #define EXC_STORE_ACCESS 7 28386561f8SAndrew Jones #define EXC_SYSCALL 8 29386561f8SAndrew Jones #define EXC_HYPERVISOR_SYSCALL 9 30386561f8SAndrew Jones #define EXC_SUPERVISOR_SYSCALL 10 31386561f8SAndrew Jones #define EXC_INST_PAGE_FAULT 12 32386561f8SAndrew Jones #define EXC_LOAD_PAGE_FAULT 13 33386561f8SAndrew Jones #define EXC_STORE_PAGE_FAULT 15 34386561f8SAndrew Jones #define EXC_INST_GUEST_PAGE_FAULT 20 35386561f8SAndrew Jones #define EXC_LOAD_GUEST_PAGE_FAULT 21 36386561f8SAndrew Jones #define EXC_VIRTUAL_INST_FAULT 22 37386561f8SAndrew Jones #define EXC_STORE_GUEST_PAGE_FAULT 23 38bd744d46SAndrew Jones 3922f287f4SAndrew Jones #ifndef __ASSEMBLY__ 4022f287f4SAndrew Jones 4122f287f4SAndrew Jones #define csr_swap(csr, val) \ 4222f287f4SAndrew Jones ({ \ 4322f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 4422f287f4SAndrew Jones __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ 4522f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 4622f287f4SAndrew Jones : "memory"); \ 4722f287f4SAndrew Jones __v; \ 4822f287f4SAndrew Jones }) 4922f287f4SAndrew Jones 5022f287f4SAndrew Jones #define csr_read(csr) \ 5122f287f4SAndrew Jones ({ \ 5222f287f4SAndrew Jones register unsigned long __v; \ 5322f287f4SAndrew Jones __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ 5422f287f4SAndrew Jones : "=r" (__v) : \ 5522f287f4SAndrew Jones : "memory"); \ 5622f287f4SAndrew Jones __v; \ 5722f287f4SAndrew Jones }) 5822f287f4SAndrew Jones 5922f287f4SAndrew Jones #define csr_write(csr, val) \ 6022f287f4SAndrew Jones ({ \ 6122f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 6222f287f4SAndrew Jones __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ 6322f287f4SAndrew Jones : : "rK" (__v) \ 6422f287f4SAndrew Jones : "memory"); \ 6522f287f4SAndrew Jones }) 6622f287f4SAndrew Jones 6722f287f4SAndrew Jones #define csr_read_set(csr, val) \ 6822f287f4SAndrew Jones ({ \ 6922f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 7022f287f4SAndrew Jones __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ 7122f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 7222f287f4SAndrew Jones : "memory"); \ 7322f287f4SAndrew Jones __v; \ 7422f287f4SAndrew Jones }) 7522f287f4SAndrew Jones 7622f287f4SAndrew Jones #define csr_set(csr, val) \ 7722f287f4SAndrew Jones ({ \ 7822f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 7922f287f4SAndrew Jones __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ 8022f287f4SAndrew Jones : : "rK" (__v) \ 8122f287f4SAndrew Jones : "memory"); \ 8222f287f4SAndrew Jones }) 8322f287f4SAndrew Jones 8422f287f4SAndrew Jones #define csr_read_clear(csr, val) \ 8522f287f4SAndrew Jones ({ \ 8622f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 8722f287f4SAndrew Jones __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ 8822f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 8922f287f4SAndrew Jones : "memory"); \ 9022f287f4SAndrew Jones __v; \ 9122f287f4SAndrew Jones }) 9222f287f4SAndrew Jones 9322f287f4SAndrew Jones #define csr_clear(csr, val) \ 9422f287f4SAndrew Jones ({ \ 9522f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 9622f287f4SAndrew Jones __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ 9722f287f4SAndrew Jones : : "rK" (__v) \ 9822f287f4SAndrew Jones : "memory"); \ 9922f287f4SAndrew Jones }) 10022f287f4SAndrew Jones 10122f287f4SAndrew Jones #endif /* !__ASSEMBLY__ */ 102bd744d46SAndrew Jones #endif /* _ASMRISCV_CSR_H_ */ 103