1 /* 2 * Preliminary support for HW exception handing for Microblaze 3 * 4 * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> 5 * Copyright (C) 2008-2009 PetaLogix 6 * Copyright (C) 2005 John Williams <jwilliams@itee.uq.edu.au> 7 * 8 * This file is subject to the terms and conditions of the GNU General 9 * Public License. See the file COPYING in the main directory of this 10 * archive for more details. 11 */ 12 13 #ifndef _ASM_MICROBLAZE_EXCEPTIONS_H 14 #define _ASM_MICROBLAZE_EXCEPTIONS_H 15 16 #ifdef __KERNEL__ 17 #ifndef __ASSEMBLY__ 18 19 /* Macros to enable and disable HW exceptions in the MSR */ 20 /* Define MSR enable bit for HW exceptions */ 21 #define HWEX_MSR_BIT (1 << 8) 22 23 #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR 24 #define __enable_hw_exceptions() \ 25 __asm__ __volatile__ (" msrset r0, %0; \ 26 nop;" \ 27 : \ 28 : "i" (HWEX_MSR_BIT) \ 29 : "memory") 30 31 #define __disable_hw_exceptions() \ 32 __asm__ __volatile__ (" msrclr r0, %0; \ 33 nop;" \ 34 : \ 35 : "i" (HWEX_MSR_BIT) \ 36 : "memory") 37 #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 38 #define __enable_hw_exceptions() \ 39 __asm__ __volatile__ (" \ 40 mfs r12, rmsr; \ 41 nop; \ 42 ori r12, r12, %0; \ 43 mts rmsr, r12; \ 44 nop;" \ 45 : \ 46 : "i" (HWEX_MSR_BIT) \ 47 : "memory", "r12") 48 49 #define __disable_hw_exceptions() \ 50 __asm__ __volatile__ (" \ 51 mfs r12, rmsr; \ 52 nop; \ 53 andi r12, r12, ~%0; \ 54 mts rmsr, r12; \ 55 nop;" \ 56 : \ 57 : "i" (HWEX_MSR_BIT) \ 58 : "memory", "r12") 59 #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ 60 61 asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, 62 int fsr, int addr); 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 #if defined(CONFIG_KGDB) 68 void (*debugger)(struct pt_regs *regs); 69 int (*debugger_bpt)(struct pt_regs *regs); 70 int (*debugger_sstep)(struct pt_regs *regs); 71 int (*debugger_iabr_match)(struct pt_regs *regs); 72 int (*debugger_dabr_match)(struct pt_regs *regs); 73 void (*debugger_fault_handler)(struct pt_regs *regs); 74 #else 75 #define debugger(regs) do { } while (0) 76 #define debugger_bpt(regs) 0 77 #define debugger_sstep(regs) 0 78 #define debugger_iabr_match(regs) 0 79 #define debugger_dabr_match(regs) 0 80 #define debugger_fault_handler ((void (*)(struct pt_regs *))0) 81 #endif 82 83 #endif /*__ASSEMBLY__ */ 84 #endif /* __KERNEL__ */ 85 #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ 86