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 12*ad435a71SAndrew Jones #define CSR_SATP 0x180 13386561f8SAndrew Jones 14386561f8SAndrew Jones /* Exception cause high bit - is an interrupt if set */ 15386561f8SAndrew Jones #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) 16386561f8SAndrew Jones 17386561f8SAndrew Jones /* Exception causes */ 18386561f8SAndrew Jones #define EXC_INST_MISALIGNED 0 19386561f8SAndrew Jones #define EXC_INST_ACCESS 1 20386561f8SAndrew Jones #define EXC_INST_ILLEGAL 2 21386561f8SAndrew Jones #define EXC_BREAKPOINT 3 22386561f8SAndrew Jones #define EXC_LOAD_MISALIGNED 4 23386561f8SAndrew Jones #define EXC_LOAD_ACCESS 5 24386561f8SAndrew Jones #define EXC_STORE_MISALIGNED 6 25386561f8SAndrew Jones #define EXC_STORE_ACCESS 7 26386561f8SAndrew Jones #define EXC_SYSCALL 8 27386561f8SAndrew Jones #define EXC_HYPERVISOR_SYSCALL 9 28386561f8SAndrew Jones #define EXC_SUPERVISOR_SYSCALL 10 29386561f8SAndrew Jones #define EXC_INST_PAGE_FAULT 12 30386561f8SAndrew Jones #define EXC_LOAD_PAGE_FAULT 13 31386561f8SAndrew Jones #define EXC_STORE_PAGE_FAULT 15 32386561f8SAndrew Jones #define EXC_INST_GUEST_PAGE_FAULT 20 33386561f8SAndrew Jones #define EXC_LOAD_GUEST_PAGE_FAULT 21 34386561f8SAndrew Jones #define EXC_VIRTUAL_INST_FAULT 22 35386561f8SAndrew Jones #define EXC_STORE_GUEST_PAGE_FAULT 23 36bd744d46SAndrew Jones 3722f287f4SAndrew Jones #ifndef __ASSEMBLY__ 3822f287f4SAndrew Jones 3922f287f4SAndrew Jones #define csr_swap(csr, val) \ 4022f287f4SAndrew Jones ({ \ 4122f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 4222f287f4SAndrew Jones __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ 4322f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 4422f287f4SAndrew Jones : "memory"); \ 4522f287f4SAndrew Jones __v; \ 4622f287f4SAndrew Jones }) 4722f287f4SAndrew Jones 4822f287f4SAndrew Jones #define csr_read(csr) \ 4922f287f4SAndrew Jones ({ \ 5022f287f4SAndrew Jones register unsigned long __v; \ 5122f287f4SAndrew Jones __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ 5222f287f4SAndrew Jones : "=r" (__v) : \ 5322f287f4SAndrew Jones : "memory"); \ 5422f287f4SAndrew Jones __v; \ 5522f287f4SAndrew Jones }) 5622f287f4SAndrew Jones 5722f287f4SAndrew Jones #define csr_write(csr, val) \ 5822f287f4SAndrew Jones ({ \ 5922f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 6022f287f4SAndrew Jones __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ 6122f287f4SAndrew Jones : : "rK" (__v) \ 6222f287f4SAndrew Jones : "memory"); \ 6322f287f4SAndrew Jones }) 6422f287f4SAndrew Jones 6522f287f4SAndrew Jones #define csr_read_set(csr, val) \ 6622f287f4SAndrew Jones ({ \ 6722f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 6822f287f4SAndrew Jones __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ 6922f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 7022f287f4SAndrew Jones : "memory"); \ 7122f287f4SAndrew Jones __v; \ 7222f287f4SAndrew Jones }) 7322f287f4SAndrew Jones 7422f287f4SAndrew Jones #define csr_set(csr, val) \ 7522f287f4SAndrew Jones ({ \ 7622f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 7722f287f4SAndrew Jones __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ 7822f287f4SAndrew Jones : : "rK" (__v) \ 7922f287f4SAndrew Jones : "memory"); \ 8022f287f4SAndrew Jones }) 8122f287f4SAndrew Jones 8222f287f4SAndrew Jones #define csr_read_clear(csr, val) \ 8322f287f4SAndrew Jones ({ \ 8422f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 8522f287f4SAndrew Jones __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ 8622f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 8722f287f4SAndrew Jones : "memory"); \ 8822f287f4SAndrew Jones __v; \ 8922f287f4SAndrew Jones }) 9022f287f4SAndrew Jones 9122f287f4SAndrew Jones #define csr_clear(csr, val) \ 9222f287f4SAndrew Jones ({ \ 9322f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 9422f287f4SAndrew Jones __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ 9522f287f4SAndrew Jones : : "rK" (__v) \ 9622f287f4SAndrew Jones : "memory"); \ 9722f287f4SAndrew Jones }) 9822f287f4SAndrew Jones 9922f287f4SAndrew Jones #endif /* !__ASSEMBLY__ */ 100bd744d46SAndrew Jones #endif /* _ASMRISCV_CSR_H_ */ 101