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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Preliminary support for HW exception handing for Microblaze
*
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
* Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au>
*/
#ifndef _ASM_MICROBLAZE_EXCEPTIONS_H
#define _ASM_MICROBLAZE_EXCEPTIONS_H
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
/* 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 /*__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */