1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Preliminary support for HW exception handing for Microblaze 4 * 5 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 6 * Copyright (C) 2008-2009 PetaLogix 7 * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> 8 */ 9 10 #ifndef _ASM_MICROBLAZE_EXCEPTIONS_H 11 #define _ASM_MICROBLAZE_EXCEPTIONS_H 12 13 #ifdef __KERNEL__ 14 #ifndef __ASSEMBLY__ 15 16 /* Macros to enable and disable HW exceptions in the MSR */ 17 /* Define MSR enable bit for HW exceptions */ 18 #define HWEX_MSR_BIT (1 << 8) 19 20 #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 21 #define __enable_hw_exceptions() \ 22 __asm__ __volatile__ (" msrset r0, %0; \ 23 nop;" \ 24 : \ 25 : "i" (HWEX_MSR_BIT) \ 26 : "memory") 27 28 #define __disable_hw_exceptions() \ 29 __asm__ __volatile__ (" msrclr r0, %0; \ 30 nop;" \ 31 : \ 32 : "i" (HWEX_MSR_BIT) \ 33 : "memory") 34 #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 35 #define __enable_hw_exceptions() \ 36 __asm__ __volatile__ (" \ 37 mfs r12, rmsr; \ 38 nop; \ 39 ori r12, r12, %0; \ 40 mts rmsr, r12; \ 41 nop;" \ 42 : \ 43 : "i" (HWEX_MSR_BIT) \ 44 : "memory", "r12") 45 46 #define __disable_hw_exceptions() \ 47 __asm__ __volatile__ (" \ 48 mfs r12, rmsr; \ 49 nop; \ 50 andi r12, r12, ~%0; \ 51 mts rmsr, r12; \ 52 nop;" \ 53 : \ 54 : "i" (HWEX_MSR_BIT) \ 55 : "memory", "r12") 56 #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 57 58 asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, 59 int fsr, int addr); 60 61 asmlinkage void sw_exception(struct pt_regs *regs); 62 void bad_page_fault(struct pt_regs *regs, unsigned long address, int sig); 63 64 void die(const char *str, struct pt_regs *fp, long err); 65 void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); 66 67 #endif /*__ASSEMBLY__ */ 68 #endif /* __KERNEL__ */ 69 #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ 70