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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 (dhowells@redhat.com)
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 */
122