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- /* SPDX-License-Identifier: GPL-2.0 */
- /*
- * Preliminary support for HW exception handing for Microblaze
- *
- * Copyright (C) 2008-2009 Michal Simek <[email protected]>
- * Copyright (C) 2008-2009 PetaLogix
- * Copyright (C) 2005 John Williams <[email protected]>
- */
- #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 */
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