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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2015 Regents of the University of California
*
* Taken from Linux arch/riscv/include/asm/csr.h
*/
#ifndef _ASM_RISCV_CSR_H
#define _ASM_RISCV_CSR_H
#include <linux/const.h>
/* Status register flags */
#define SR_SIE _AC(0x00000002, UL) /* Supervisor Interrupt Enable */
#define SR_SPIE _AC(0x00000020, UL) /* Previous Supervisor IE */
#define SR_SPP _AC(0x00000100, UL) /* Previously Supervisor */
#define SR_SUM _AC(0x00040000, UL) /* Supervisor access User Memory */
#define SR_FS _AC(0x00006000, UL) /* Floating-point Status */
#define SR_FS_OFF _AC(0x00000000, UL)
#define SR_FS_INITIAL _AC(0x00002000, UL)
#define SR_FS_CLEAN _AC(0x00004000, UL)
#define SR_FS_DIRTY _AC(0x00006000, UL)
#define SR_XS _AC(0x00018000, UL) /* Extension Status */
#define SR_XS_OFF _AC(0x00000000, UL)
#define SR_XS_INITIAL _AC(0x00008000, UL)
#define SR_XS_CLEAN _AC(0x00010000, UL)
#define SR_XS_DIRTY _AC(0x00018000, UL)
#ifndef CONFIG_64BIT
#define SR_SD _AC(0x80000000, UL) /* FS/XS dirty */
#else
#define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */
#endif
/* SATP flags */
#if __riscv_xlen == 32
#define SATP_PPN _AC(0x003FFFFF, UL)
#define SATP_MODE_32 _AC(0x80000000, UL)
#define SATP_MODE SATP_MODE_32
#else
#define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL)
#define SATP_MODE_39 _AC(0x8000000000000000, UL)
#define SATP_MODE SATP_MODE_39
#endif
/* Interrupt Enable and Interrupt Pending flags */
#define SIE_SSIE _AC(0x00000002, UL) /* Software Interrupt Enable */
#define SIE_STIE _AC(0x00000020, UL) /* Timer Interrupt Enable */
#define EXC_INST_MISALIGNED 0
#define EXC_INST_ACCESS 1
#define EXC_BREAKPOINT 3
#define EXC_LOAD_ACCESS 5
#define EXC_STORE_ACCESS 7
#define EXC_SYSCALL 8
#define EXC_INST_PAGE_FAULT 12
#define EXC_LOAD_PAGE_FAULT 13
#define EXC_STORE_PAGE_FAULT 15
#ifndef __ASSEMBLY__
#define xcsr(csr) #csr
#define csr_swap(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrrw %0, " xcsr(csr) ", %1" \
: "=r" (__v) : "rK" (__v) \
: "memory"); \
__v; \
})
#define csr_read(csr) \
({ \
register unsigned long __v; \
__asm__ __volatile__ ("csrr %0, " xcsr(csr) \
: "=r" (__v) : \
: "memory"); \
__v; \
})
#define csr_write(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrw " xcsr(csr) ", %0" \
: : "rK" (__v) \
: "memory"); \
})
#define csr_read_set(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrrs %0, " xcsr(csr) ", %1" \
: "=r" (__v) : "rK" (__v) \
: "memory"); \
__v; \
})
#define csr_set(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrs " xcsr(csr) ", %0" \
: : "rK" (__v) \
: "memory"); \
})
#define csr_read_clear(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrrc %0, " xcsr(csr) ", %1" \
: "=r" (__v) : "rK" (__v) \
: "memory"); \
__v; \
})
#define csr_clear(csr, val) \
({ \
unsigned long __v = (unsigned long)(val); \
__asm__ __volatile__ ("csrc " xcsr(csr) ", %0" \
: : "rK" (__v) \
: "memory"); \
})
#endif /* __ASSEMBLY__ */
#endif /* _ASM_RISCV_CSR_H */
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