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/*
 * Copyright (C) 2015 Regents of the University of California
 *
 *   This program is free software; you can redistribute it and/or
 *   modify it under the terms of the GNU General Public License
 *   as published by the Free Software Foundation, version 2.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 */

#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 may 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

/* SPTBR flags */
#if __riscv_xlen == 32
#define SPTBR_PPN     _AC(0x003FFFFF, UL)
#define SPTBR_MODE_32 _AC(0x80000000, UL)
#define SPTBR_MODE    SPTBR_MODE_32
#else
#define SPTBR_PPN     _AC(0x00000FFFFFFFFFFF, UL)
#define SPTBR_MODE_39 _AC(0x8000000000000000, UL)
#define SPTBR_MODE    SPTBR_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 csr_swap(csr, val)					\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrrw %0, " #csr ", %1"		\
			      : "=r" (__v) : "rK" (__v)		\
			      : "memory");			\
	__v;							\
})

#define csr_read(csr)						\
({								\
	register unsigned long __v;				\
	__asm__ __volatile__ ("csrr %0, " #csr			\
			      : "=r" (__v) :			\
			      : "memory");			\
	__v;							\
})

#define csr_write(csr, val)					\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrw " #csr ", %0"		\
			      : : "rK" (__v)			\
			      : "memory");			\
})

#define csr_read_set(csr, val)					\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrrs %0, " #csr ", %1"		\
			      : "=r" (__v) : "rK" (__v)		\
			      : "memory");			\
	__v;							\
})

#define csr_set(csr, val)					\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrs " #csr ", %0"		\
			      : : "rK" (__v)			\
			      : "memory");			\
})

#define csr_read_clear(csr, val)				\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrrc %0, " #csr ", %1"		\
			      : "=r" (__v) : "rK" (__v)		\
			      : "memory");			\
	__v;							\
})

#define csr_clear(csr, val)					\
({								\
	unsigned long __v = (unsigned long)(val);		\
	__asm__ __volatile__ ("csrc " #csr ", %0"		\
			      : : "rK" (__v)			\
			      : "memory");			\
})

#endif /* __ASSEMBLY__ */

#endif /* _ASM_RISCV_CSR_H */

Filemanager

Name Type Size Permission Actions
Kbuild File 1.37 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 176 B 0644
asm.h File 1.78 KB 0644
atomic.h File 11.31 KB 0644
barrier.h File 2.59 KB 0644
bitops.h File 6.23 KB 0644
bug.h File 2.12 KB 0644
cache.h File 745 B 0644
cacheflush.h File 1.7 KB 0644
cmpxchg.h File 3.35 KB 0644
compat.h File 924 B 0644
csr.h File 3.8 KB 0644
current.h File 1.27 KB 0644
delay.h File 881 B 0644
dma-mapping.h File 1.19 KB 0644
elf.h File 2.3 KB 0644
fence.h File 279 B 0644
hwcap.h File 1013 B 0644
io.h File 11.81 KB 0644
irq.h File 841 B 0644
irqflags.h File 1.54 KB 0644
kprobes.h File 679 B 0644
linkage.h File 677 B 0644
mmu.h File 829 B 0644
mmu_context.h File 3.14 KB 0644
page.h File 3.76 KB 0644
pci.h File 1.16 KB 0644
pgalloc.h File 3.06 KB 0644
pgtable-32.h File 870 B 0644
pgtable-64.h File 2.08 KB 0644
pgtable-bits.h File 1.81 KB 0644
pgtable.h File 11.17 KB 0644
processor.h File 2.44 KB 0644
ptrace.h File 2.69 KB 0644
sbi.h File 2.6 KB 0644
smp.h File 1.59 KB 0644
spinlock.h File 2.85 KB 0644
spinlock_types.h File 906 B 0644
string.h File 838 B 0644
switch_to.h File 1.86 KB 0644
syscall.h File 2.59 KB 0644
thread_info.h File 3.11 KB 0644
timex.h File 1.29 KB 0644
tlb.h File 717 B 0644
tlbflush.h File 1.83 KB 0644
uaccess.h File 14 KB 0644
unistd.h File 638 B 0644
vdso.h File 1.49 KB 0644
word-at-a-time.h File 1.48 KB 0644