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exceptions.h
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1 /* MN10300 Microcontroller core exceptions
2  *
3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4  * Written by David Howells ([email protected])
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public Licence
8  * as published by the Free Software Foundation; either version
9  * 2 of the Licence, or (at your option) any later version.
10  */
11 #ifndef _ASM_EXCEPTIONS_H
12 #define _ASM_EXCEPTIONS_H
13 
14 #include <linux/linkage.h>
15 
16 /*
17  * define the breakpoint instruction opcode to use
18  * - note that the JTAG unit steals 0xFF, so you can't use JTAG and GDBSTUB at
19  * the same time.
20  */
21 #define GDBSTUB_BKPT 0xFF
22 
23 #ifndef __ASSEMBLY__
24 
25 /*
26  * enumeration of exception codes (as extracted from TBR MSW)
27  */
28 enum exception_code {
29  EXCEP_RESET = 0x000000, /* reset */
30 
31  /* MMU exceptions */
32  EXCEP_ITLBMISS = 0x000100, /* instruction TLB miss */
33  EXCEP_DTLBMISS = 0x000108, /* data TLB miss */
34  EXCEP_IAERROR = 0x000110, /* instruction address */
35  EXCEP_DAERROR = 0x000118, /* data address */
36 
37  /* system exceptions */
38  EXCEP_TRAP = 0x000128, /* program interrupt (PI instruction) */
39  EXCEP_ISTEP = 0x000130, /* single step */
40  EXCEP_IBREAK = 0x000150, /* instruction breakpoint */
41  EXCEP_OBREAK = 0x000158, /* operand breakpoint */
42  EXCEP_PRIVINS = 0x000160, /* privileged instruction execution */
43  EXCEP_UNIMPINS = 0x000168, /* unimplemented instruction execution */
44  EXCEP_UNIMPEXINS = 0x000170, /* unimplemented extended instruction execution */
45  EXCEP_MEMERR = 0x000178, /* illegal memory access */
46  EXCEP_MISALIGN = 0x000180, /* misalignment */
47  EXCEP_BUSERROR = 0x000188, /* bus error */
48  EXCEP_ILLINSACC = 0x000190, /* illegal instruction access */
49  EXCEP_ILLDATACC = 0x000198, /* illegal data access */
50  EXCEP_IOINSACC = 0x0001a0, /* I/O space instruction access */
51  EXCEP_PRIVINSACC = 0x0001a8, /* privileged space instruction access */
52  EXCEP_PRIVDATACC = 0x0001b0, /* privileged space data access */
53  EXCEP_DATINSACC = 0x0001b8, /* data space instruction access */
54  EXCEP_DOUBLE_FAULT = 0x000200, /* double fault */
55 
56  /* FPU exceptions */
57  EXCEP_FPU_DISABLED = 0x0001c0, /* FPU disabled */
58  EXCEP_FPU_UNIMPINS = 0x0001c8, /* FPU unimplemented operation */
59  EXCEP_FPU_OPERATION = 0x0001d0, /* FPU operation */
60 
61  /* interrupts */
62  EXCEP_WDT = 0x000240, /* watchdog timer overflow */
63  EXCEP_NMI = 0x000248, /* non-maskable interrupt */
64  EXCEP_IRQ_LEVEL0 = 0x000280, /* level 0 maskable interrupt */
65  EXCEP_IRQ_LEVEL1 = 0x000288, /* level 1 maskable interrupt */
66  EXCEP_IRQ_LEVEL2 = 0x000290, /* level 2 maskable interrupt */
67  EXCEP_IRQ_LEVEL3 = 0x000298, /* level 3 maskable interrupt */
68  EXCEP_IRQ_LEVEL4 = 0x0002a0, /* level 4 maskable interrupt */
69  EXCEP_IRQ_LEVEL5 = 0x0002a8, /* level 5 maskable interrupt */
70  EXCEP_IRQ_LEVEL6 = 0x0002b0, /* level 6 maskable interrupt */
71 
72  /* system calls */
73  EXCEP_SYSCALL0 = 0x000300, /* system call 0 */
74  EXCEP_SYSCALL1 = 0x000308, /* system call 1 */
75  EXCEP_SYSCALL2 = 0x000310, /* system call 2 */
76  EXCEP_SYSCALL3 = 0x000318, /* system call 3 */
77  EXCEP_SYSCALL4 = 0x000320, /* system call 4 */
78  EXCEP_SYSCALL5 = 0x000328, /* system call 5 */
79  EXCEP_SYSCALL6 = 0x000330, /* system call 6 */
80  EXCEP_SYSCALL7 = 0x000338, /* system call 7 */
81  EXCEP_SYSCALL8 = 0x000340, /* system call 8 */
82  EXCEP_SYSCALL9 = 0x000348, /* system call 9 */
83  EXCEP_SYSCALL10 = 0x000350, /* system call 10 */
84  EXCEP_SYSCALL11 = 0x000358, /* system call 11 */
85  EXCEP_SYSCALL12 = 0x000360, /* system call 12 */
86  EXCEP_SYSCALL13 = 0x000368, /* system call 13 */
87  EXCEP_SYSCALL14 = 0x000370, /* system call 14 */
88  EXCEP_SYSCALL15 = 0x000378, /* system call 15 */
89 };
90 
91 extern void __set_intr_stub(enum exception_code code, void *handler);
92 extern void set_intr_stub(enum exception_code code, void *handler);
93 
94 struct pt_regs;
95 
96 extern asmlinkage void __common_exception(void);
97 extern asmlinkage void itlb_miss(void);
98 extern asmlinkage void dtlb_miss(void);
99 extern asmlinkage void itlb_aerror(void);
100 extern asmlinkage void dtlb_aerror(void);
101 extern asmlinkage void raw_bus_error(void);
102 extern asmlinkage void double_fault(void);
103 extern asmlinkage int system_call(struct pt_regs *);
104 extern asmlinkage void nmi(struct pt_regs *, enum exception_code);
105 extern asmlinkage void uninitialised_exception(struct pt_regs *,
106  enum exception_code);
107 extern asmlinkage void irq_handler(void);
108 extern asmlinkage void profile_handler(void);
109 extern asmlinkage void nmi_handler(void);
110 extern asmlinkage void misalignment(struct pt_regs *, enum exception_code);
111 
112 extern void die(const char *, struct pt_regs *, enum exception_code)
113  __noreturn;
114 
115 extern int die_if_no_fixup(const char *, struct pt_regs *, enum exception_code);
116 
117 #define NUM2EXCEP_IRQ_LEVEL(num) (EXCEP_IRQ_LEVEL0 + (num) * 8)
118 
119 #endif /* __ASSEMBLY__ */
120 
121 #endif /* _ASM_EXCEPTIONS_H */
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