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 6*386561f8SAndrew Jones #define CSR_SSTATUS 0x100 7*386561f8SAndrew Jones #define CSR_STVEC 0x105 8bd744d46SAndrew Jones #define CSR_SSCRATCH 0x140 9*386561f8SAndrew Jones #define CSR_SEPC 0x141 10*386561f8SAndrew Jones #define CSR_SCAUSE 0x142 11*386561f8SAndrew Jones #define CSR_STVAL 0x143 12*386561f8SAndrew Jones 13*386561f8SAndrew Jones /* Exception cause high bit - is an interrupt if set */ 14*386561f8SAndrew Jones #define CAUSE_IRQ_FLAG (_AC(1, UL) << (__riscv_xlen - 1)) 15*386561f8SAndrew Jones 16*386561f8SAndrew Jones /* Exception causes */ 17*386561f8SAndrew Jones #define EXC_INST_MISALIGNED 0 18*386561f8SAndrew Jones #define EXC_INST_ACCESS 1 19*386561f8SAndrew Jones #define EXC_INST_ILLEGAL 2 20*386561f8SAndrew Jones #define EXC_BREAKPOINT 3 21*386561f8SAndrew Jones #define EXC_LOAD_MISALIGNED 4 22*386561f8SAndrew Jones #define EXC_LOAD_ACCESS 5 23*386561f8SAndrew Jones #define EXC_STORE_MISALIGNED 6 24*386561f8SAndrew Jones #define EXC_STORE_ACCESS 7 25*386561f8SAndrew Jones #define EXC_SYSCALL 8 26*386561f8SAndrew Jones #define EXC_HYPERVISOR_SYSCALL 9 27*386561f8SAndrew Jones #define EXC_SUPERVISOR_SYSCALL 10 28*386561f8SAndrew Jones #define EXC_INST_PAGE_FAULT 12 29*386561f8SAndrew Jones #define EXC_LOAD_PAGE_FAULT 13 30*386561f8SAndrew Jones #define EXC_STORE_PAGE_FAULT 15 31*386561f8SAndrew Jones #define EXC_INST_GUEST_PAGE_FAULT 20 32*386561f8SAndrew Jones #define EXC_LOAD_GUEST_PAGE_FAULT 21 33*386561f8SAndrew Jones #define EXC_VIRTUAL_INST_FAULT 22 34*386561f8SAndrew Jones #define EXC_STORE_GUEST_PAGE_FAULT 23 35bd744d46SAndrew Jones 3622f287f4SAndrew Jones #ifndef __ASSEMBLY__ 3722f287f4SAndrew Jones 3822f287f4SAndrew Jones #define csr_swap(csr, val) \ 3922f287f4SAndrew Jones ({ \ 4022f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 4122f287f4SAndrew Jones __asm__ __volatile__ ("csrrw %0, " __ASM_STR(csr) ", %1"\ 4222f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 4322f287f4SAndrew Jones : "memory"); \ 4422f287f4SAndrew Jones __v; \ 4522f287f4SAndrew Jones }) 4622f287f4SAndrew Jones 4722f287f4SAndrew Jones #define csr_read(csr) \ 4822f287f4SAndrew Jones ({ \ 4922f287f4SAndrew Jones register unsigned long __v; \ 5022f287f4SAndrew Jones __asm__ __volatile__ ("csrr %0, " __ASM_STR(csr) \ 5122f287f4SAndrew Jones : "=r" (__v) : \ 5222f287f4SAndrew Jones : "memory"); \ 5322f287f4SAndrew Jones __v; \ 5422f287f4SAndrew Jones }) 5522f287f4SAndrew Jones 5622f287f4SAndrew Jones #define csr_write(csr, val) \ 5722f287f4SAndrew Jones ({ \ 5822f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 5922f287f4SAndrew Jones __asm__ __volatile__ ("csrw " __ASM_STR(csr) ", %0" \ 6022f287f4SAndrew Jones : : "rK" (__v) \ 6122f287f4SAndrew Jones : "memory"); \ 6222f287f4SAndrew Jones }) 6322f287f4SAndrew Jones 6422f287f4SAndrew Jones #define csr_read_set(csr, val) \ 6522f287f4SAndrew Jones ({ \ 6622f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 6722f287f4SAndrew Jones __asm__ __volatile__ ("csrrs %0, " __ASM_STR(csr) ", %1"\ 6822f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 6922f287f4SAndrew Jones : "memory"); \ 7022f287f4SAndrew Jones __v; \ 7122f287f4SAndrew Jones }) 7222f287f4SAndrew Jones 7322f287f4SAndrew Jones #define csr_set(csr, val) \ 7422f287f4SAndrew Jones ({ \ 7522f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 7622f287f4SAndrew Jones __asm__ __volatile__ ("csrs " __ASM_STR(csr) ", %0" \ 7722f287f4SAndrew Jones : : "rK" (__v) \ 7822f287f4SAndrew Jones : "memory"); \ 7922f287f4SAndrew Jones }) 8022f287f4SAndrew Jones 8122f287f4SAndrew Jones #define csr_read_clear(csr, val) \ 8222f287f4SAndrew Jones ({ \ 8322f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 8422f287f4SAndrew Jones __asm__ __volatile__ ("csrrc %0, " __ASM_STR(csr) ", %1"\ 8522f287f4SAndrew Jones : "=r" (__v) : "rK" (__v) \ 8622f287f4SAndrew Jones : "memory"); \ 8722f287f4SAndrew Jones __v; \ 8822f287f4SAndrew Jones }) 8922f287f4SAndrew Jones 9022f287f4SAndrew Jones #define csr_clear(csr, val) \ 9122f287f4SAndrew Jones ({ \ 9222f287f4SAndrew Jones unsigned long __v = (unsigned long)(val); \ 9322f287f4SAndrew Jones __asm__ __volatile__ ("csrc " __ASM_STR(csr) ", %0" \ 9422f287f4SAndrew Jones : : "rK" (__v) \ 9522f287f4SAndrew Jones : "memory"); \ 9622f287f4SAndrew Jones }) 9722f287f4SAndrew Jones 9822f287f4SAndrew Jones #endif /* !__ASSEMBLY__ */ 99bd744d46SAndrew Jones #endif /* _ASMRISCV_CSR_H_ */ 100