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linux/arch/microblaze/include/asm/exceptions.h

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microblaze_v8: exception handling Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27 21:25:13 +08:00
/*
* Preliminary support for HW exception handing for Microblaze
*
microblaze_mmu_v2: Traps MMU update Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-05-26 22:30:27 +08:00
* Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu>
* Copyright (C) 2008-2009 PetaLogix
microblaze_v8: exception handling Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27 21:25:13 +08:00
* 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__
microblaze: Add stack unwinder Implement intelligent backtracing by searching for stack frame creation, and emitting only return addresses. Use print_hex_dump() to display the entire binary kernel stack. Limitation: MMU kernels are not currently able to trace beyond a system trap (interrupt, syscall, etc.). It is the intent of this patch to provide infrastructure that can be extended to add this capability later. Changes from V1: * Removed checks in find_frame_creation() that prevented location of the frame creation instruction in heavily optimized code * Various formatting/commenting/file location tweaks per review comments * Dropped Kconfig option to enable STACKTRACE as something logically separate Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
2010-04-28 01:37:54 +08:00
#ifndef CONFIG_MMU
#define EX_HANDLER_STACK_SIZ (4*19)
#endif
microblaze_v8: exception handling Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27 21:25:13 +08:00
#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);
microblaze: Fix sparse warning - sw_exceptions Function sw_exception is linked with asm code. Warning log: CHECK arch/microblaze/kernel/exceptions.c arch/microblaze/kernel/exceptions.c:53:6: warning: symbol 'sw_exception' was not declared. Should it be static? Signed-off-by: Michal Simek <monstr@monstr.eu>
2011-02-07 18:36:25 +08:00
asmlinkage void sw_exception(struct pt_regs *regs);
microblaze: Add missing declaration for die and _exception func This change remove sparse errors. Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-04-16 17:11:22 +08:00
void die(const char *str, struct pt_regs *fp, long err);
void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
microblaze_v8: exception handling Reviewed-by: Ingo Molnar <mingo@elte.hu> Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com> Acked-by: John Linn <john.linn@xilinx.com> Acked-by: John Williams <john.williams@petalogix.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
2009-03-27 21:25:13 +08:00
#endif /*__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */