Linux kernel mirror (for testing)
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linux
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
61asmlinkage void full_exception(struct pt_regs *regs, unsigned int type,
62 int fsr, int addr);
63
64void die(const char *str, struct pt_regs *fp, long err);
65void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr);
66
67#ifdef CONFIG_MMU
68void __bug(const char *file, int line, void *data);
69int bad_trap(int trap_num, struct pt_regs *regs);
70int debug_trap(struct pt_regs *regs);
71#endif /* CONFIG_MMU */
72
73#if defined(CONFIG_KGDB)
74void (*debugger)(struct pt_regs *regs);
75int (*debugger_bpt)(struct pt_regs *regs);
76int (*debugger_sstep)(struct pt_regs *regs);
77int (*debugger_iabr_match)(struct pt_regs *regs);
78int (*debugger_dabr_match)(struct pt_regs *regs);
79void (*debugger_fault_handler)(struct pt_regs *regs);
80#else
81#define debugger(regs) do { } while (0)
82#define debugger_bpt(regs) 0
83#define debugger_sstep(regs) 0
84#define debugger_iabr_match(regs) 0
85#define debugger_dabr_match(regs) 0
86#define debugger_fault_handler ((void (*)(struct pt_regs *))0)
87#endif
88
89#endif /*__ASSEMBLY__ */
90#endif /* __KERNEL__ */
91#endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */