/* * 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> * * This file is subject to the terms and conditions of the GNU General * Public License. See the file COPYING in the main directory of this * archive for more details. */ #ifndef _ASM_MICROBLAZE_EXCEPTIONS_H #define _ASM_MICROBLAZE_EXCEPTIONS_H #ifdef __KERNEL__ #ifndef CONFIG_MMU #define EX_HANDLER_STACK_SIZ (4*19) #endif #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 */