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c4df4bc1 MS |
1 | /* |
2 | * Preliminary support for HW exception handing for Microblaze | |
3 | * | |
4 | * Copyright (C) 2008 Michal Simek | |
5 | * Copyright (C) 2008 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 | ||
ce0b755f MS |
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 | ||
c4df4bc1 MS |
67 | #if defined(CONFIG_XMON) |
68 | extern void xmon(struct pt_regs *regs); | |
69 | extern int xmon_bpt(struct pt_regs *regs); | |
70 | extern int xmon_sstep(struct pt_regs *regs); | |
71 | extern int xmon_iabr_match(struct pt_regs *regs); | |
72 | extern int xmon_dabr_match(struct pt_regs *regs); | |
73 | extern void (*xmon_fault_handler)(struct pt_regs *regs); | |
74 | ||
75 | void (*debugger)(struct pt_regs *regs) = xmon; | |
76 | int (*debugger_bpt)(struct pt_regs *regs) = xmon_bpt; | |
77 | int (*debugger_sstep)(struct pt_regs *regs) = xmon_sstep; | |
78 | int (*debugger_iabr_match)(struct pt_regs *regs) = xmon_iabr_match; | |
79 | int (*debugger_dabr_match)(struct pt_regs *regs) = xmon_dabr_match; | |
80 | void (*debugger_fault_handler)(struct pt_regs *regs); | |
81 | #elif defined(CONFIG_KGDB) | |
82 | void (*debugger)(struct pt_regs *regs); | |
83 | int (*debugger_bpt)(struct pt_regs *regs); | |
84 | int (*debugger_sstep)(struct pt_regs *regs); | |
85 | int (*debugger_iabr_match)(struct pt_regs *regs); | |
86 | int (*debugger_dabr_match)(struct pt_regs *regs); | |
87 | void (*debugger_fault_handler)(struct pt_regs *regs); | |
88 | #else | |
89 | #define debugger(regs) do { } while (0) | |
90 | #define debugger_bpt(regs) 0 | |
91 | #define debugger_sstep(regs) 0 | |
92 | #define debugger_iabr_match(regs) 0 | |
93 | #define debugger_dabr_match(regs) 0 | |
94 | #define debugger_fault_handler ((void (*)(struct pt_regs *))0) | |
95 | #endif | |
96 | ||
97 | #endif /*__ASSEMBLY__ */ | |
98 | #endif /* __KERNEL__ */ | |
99 | #endif /* _ASM_MICROBLAZE_EXCEPTIONS_H */ |