tools/arch/riscv/include/asm/csr.h

Source file repositories/reference/linux-study-clean/tools/arch/riscv/include/asm/csr.h

File Facts

System
Linux kernel
Corpus path
tools/arch/riscv/include/asm/csr.h
Extension
.h
Size
15246 bytes
Lines
543
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_RISCV_CSR_H
#define _ASM_RISCV_CSR_H

#include <linux/bits.h>

/* Status register flags */
#define SR_SIE		_AC(0x00000002, UL) /* Supervisor Interrupt Enable */
#define SR_MIE		_AC(0x00000008, UL) /* Machine Interrupt Enable */
#define SR_SPIE		_AC(0x00000020, UL) /* Previous Supervisor IE */
#define SR_MPIE		_AC(0x00000080, UL) /* Previous Machine IE */
#define SR_SPP		_AC(0x00000100, UL) /* Previously Supervisor */
#define SR_MPP		_AC(0x00001800, UL) /* Previously Machine */
#define SR_SUM		_AC(0x00040000, UL) /* Supervisor User Memory Access */

#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_VS		_AC(0x00000600, UL) /* Vector Status */
#define SR_VS_OFF	_AC(0x00000000, UL)
#define SR_VS_INITIAL	_AC(0x00000200, UL)
#define SR_VS_CLEAN	_AC(0x00000400, UL)
#define SR_VS_DIRTY	_AC(0x00000600, 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)

#define SR_FS_VS	(SR_FS | SR_VS) /* Vector and Floating-Point Unit */

#ifndef CONFIG_64BIT
#define SR_SD		_AC(0x80000000, UL) /* FS/VS/XS dirty */
#else
#define SR_SD		_AC(0x8000000000000000, UL) /* FS/VS/XS dirty */
#endif

#ifdef CONFIG_64BIT
#define SR_UXL		_AC(0x300000000, UL) /* XLEN mask for U-mode */
#define SR_UXL_32	_AC(0x100000000, UL) /* XLEN = 32 for U-mode */
#define SR_UXL_64	_AC(0x200000000, UL) /* XLEN = 64 for U-mode */
#endif

/* SATP flags */
#ifndef CONFIG_64BIT
#define SATP_PPN	_AC(0x003FFFFF, UL)
#define SATP_MODE_32	_AC(0x80000000, UL)
#define SATP_MODE_SHIFT	31
#define SATP_ASID_BITS	9
#define SATP_ASID_SHIFT	22
#define SATP_ASID_MASK	_AC(0x1FF, UL)
#else
#define SATP_PPN	_AC(0x00000FFFFFFFFFFF, UL)
#define SATP_MODE_39	_AC(0x8000000000000000, UL)
#define SATP_MODE_48	_AC(0x9000000000000000, UL)
#define SATP_MODE_57	_AC(0xa000000000000000, UL)
#define SATP_MODE_SHIFT	60
#define SATP_ASID_BITS	16
#define SATP_ASID_SHIFT	44
#define SATP_ASID_MASK	_AC(0xFFFF, UL)
#endif

/* Exception cause high bit - is an interrupt if set */
#define CAUSE_IRQ_FLAG		(_AC(1, UL) << (__riscv_xlen - 1))

/* Interrupt causes (minus the high bit) */
#define IRQ_S_SOFT		1
#define IRQ_VS_SOFT		2
#define IRQ_M_SOFT		3
#define IRQ_S_TIMER		5
#define IRQ_VS_TIMER		6
#define IRQ_M_TIMER		7
#define IRQ_S_EXT		9
#define IRQ_VS_EXT		10
#define IRQ_M_EXT		11
#define IRQ_S_GEXT		12
#define IRQ_PMU_OVF		13
#define IRQ_LOCAL_MAX		(IRQ_PMU_OVF + 1)
#define IRQ_LOCAL_MASK		GENMASK((IRQ_LOCAL_MAX - 1), 0)

/* Exception causes */
#define EXC_INST_MISALIGNED	0
#define EXC_INST_ACCESS		1
#define EXC_INST_ILLEGAL	2
#define EXC_BREAKPOINT		3
#define EXC_LOAD_MISALIGNED	4
#define EXC_LOAD_ACCESS		5

Annotation

Implementation Notes