arch/microblaze/include/asm/exceptions.h

Source file repositories/reference/linux-study-clean/arch/microblaze/include/asm/exceptions.h

File Facts

System
Linux kernel
Corpus path
arch/microblaze/include/asm/exceptions.h
Extension
.h
Size
1930 bytes
Lines
70
Domain
Architecture Layer
Bucket
arch/microblaze
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _ASM_MICROBLAZE_EXCEPTIONS_H
#define _ASM_MICROBLAZE_EXCEPTIONS_H

#ifdef __KERNEL__
#ifndef __ASSEMBLER__

/* Macros to enable and disable HW exceptions in the MSR */
/* Define MSR enable bit for HW exceptions */
#define HWEX_MSR_BIT (1 << 8)

#if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR
#define __enable_hw_exceptions()					\
	__asm__ __volatile__ ("	msrset	r0, %0;				\
				nop;"					\
				:					\
				: "i" (HWEX_MSR_BIT)			\
				: "memory")

#define __disable_hw_exceptions()					\
	__asm__ __volatile__ ("	msrclr r0, %0;				\
				nop;"					\
				:					\
				: "i" (HWEX_MSR_BIT)			\
				: "memory")
#else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */
#define __enable_hw_exceptions()					\
	__asm__ __volatile__ ("						\
				mfs	r12, rmsr;			\
				nop;					\
				ori	r12, r12, %0;			\
				mts	rmsr, r12;			\
				nop;"					\
				:					\
				: "i" (HWEX_MSR_BIT)			\
				: "memory", "r12")

#define __disable_hw_exceptions()					\
	__asm__ __volatile__ ("						\
				mfs	r12, rmsr;			\
				nop;					\
				andi	r12, r12, ~%0;			\
				mts	rmsr, r12;			\
				nop;"					\
				:					\
				: "i" (HWEX_MSR_BIT)			\
				: "memory", "r12")
#endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */

asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
							int fsr, int addr);

asmlinkage void sw_exception(struct pt_regs *regs);
void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig);

void die(const char *str, struct pt_regs *fp, long err);
void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);

#endif /*__ASSEMBLER__ */
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */

Annotation

Implementation Notes