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c4df4bc1 MS |
1 | /* |
2 | * Preliminary support for HW exception handing for Microblaze | |
3 | * | |
17f3324c MS |
4 | * Copyright (C) 2008-2009 Michal Simek <monstr@monstr.eu> |
5 | * Copyright (C) 2008-2009 PetaLogix | |
c4df4bc1 MS |
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__ | |
ce3266c0 SM |
17 | |
18 | #ifndef CONFIG_MMU | |
19 | #define EX_HANDLER_STACK_SIZ (4*19) | |
20 | #endif | |
21 | ||
c4df4bc1 MS |
22 | #ifndef __ASSEMBLY__ |
23 | ||
24 | /* Macros to enable and disable HW exceptions in the MSR */ | |
25 | /* Define MSR enable bit for HW exceptions */ | |
26 | #define HWEX_MSR_BIT (1 << 8) | |
27 | ||
28 | #if CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR | |
29 | #define __enable_hw_exceptions() \ | |
30 | __asm__ __volatile__ (" msrset r0, %0; \ | |
31 | nop;" \ | |
32 | : \ | |
33 | : "i" (HWEX_MSR_BIT) \ | |
34 | : "memory") | |
35 | ||
36 | #define __disable_hw_exceptions() \ | |
37 | __asm__ __volatile__ (" msrclr r0, %0; \ | |
38 | nop;" \ | |
39 | : \ | |
40 | : "i" (HWEX_MSR_BIT) \ | |
41 | : "memory") | |
42 | #else /* !CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ | |
43 | #define __enable_hw_exceptions() \ | |
44 | __asm__ __volatile__ (" \ | |
45 | mfs r12, rmsr; \ | |
46 | nop; \ | |
47 | ori r12, r12, %0; \ | |
48 | mts rmsr, r12; \ | |
49 | nop;" \ | |
50 | : \ | |
51 | : "i" (HWEX_MSR_BIT) \ | |
52 | : "memory", "r12") | |
53 | ||
54 | #define __disable_hw_exceptions() \ | |
55 | __asm__ __volatile__ (" \ | |
56 | mfs r12, rmsr; \ | |
57 | nop; \ | |
58 | andi r12, r12, ~%0; \ | |
59 | mts rmsr, r12; \ | |
60 | nop;" \ | |
61 | : \ | |
62 | : "i" (HWEX_MSR_BIT) \ | |
63 | : "memory", "r12") | |
64 | #endif /* CONFIG_XILINX_MICROBLAZE0_USE_MSR_INSTR */ | |
65 | ||
66 | asmlinkage void full_exception(struct pt_regs *regs, unsigned int type, | |
67 | int fsr, int addr); | |
68 | ||
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69 | void die(const char *str, struct pt_regs *fp, long err); |
70 | void _exception(int signr, struct pt_regs *regs, int code, unsigned long addr); | |
71 | ||
c4df4bc1 MS |
72 | #endif /*__ASSEMBLY__ */ |
73 | #endif /* __KERNEL__ */ | |
74 | #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ |