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1 | /* |
2 | * vectors.c | |
3 | * | |
4 | * Copyright (C) 1993, 1994 by Hamish Macdonald | |
5 | * | |
6 | * 68040 fixes by Michael Rausch | |
7 | * 68040 fixes by Martin Apel | |
8 | * 68040 fixes and writeback by Richard Zidlicky | |
9 | * 68060 fixes by Roman Hodek | |
10 | * 68060 fixes by Jesper Skov | |
11 | * | |
12 | * This file is subject to the terms and conditions of the GNU General Public | |
13 | * License. See the file COPYING in the main directory of this archive | |
14 | * for more details. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * Sets up all exception vectors | |
19 | */ | |
20 | #include <linux/sched.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/linkage.h> | |
23 | #include <linux/init.h> | |
24 | #include <linux/kallsyms.h> | |
25 | ||
26 | #include <asm/setup.h> | |
27 | #include <asm/fpu.h> | |
bc4f4ac2 GU |
28 | #include <asm/traps.h> |
29 | ||
30 | /* assembler routines */ | |
31 | asmlinkage void system_call(void); | |
32 | asmlinkage void buserr(void); | |
33 | asmlinkage void trap(void); | |
34 | asmlinkage void nmihandler(void); | |
35 | #ifdef CONFIG_M68KFPU_EMU | |
36 | asmlinkage void fpu_emu(void); | |
37 | #endif | |
38 | ||
39 | e_vector vectors[256]; | |
40 | ||
41 | /* nmi handler for the Amiga */ | |
42 | asm(".text\n" | |
43 | __ALIGN_STR "\n" | |
44 | "nmihandler: rte"); | |
45 | ||
46 | /* | |
47 | * this must be called very early as the kernel might | |
48 | * use some instruction that are emulated on the 060 | |
49 | * and so we're prepared for early probe attempts (e.g. nf_init). | |
50 | */ | |
51 | void __init base_trap_init(void) | |
52 | { | |
53 | if (MACH_IS_SUN3X) { | |
54 | extern e_vector *sun3x_prom_vbr; | |
55 | ||
56 | __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr)); | |
57 | } | |
58 | ||
59 | /* setup the exception vector table */ | |
60 | __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors)); | |
61 | ||
62 | if (CPU_IS_060) { | |
63 | /* set up ISP entry points */ | |
64 | asmlinkage void unimp_vec(void) asm ("_060_isp_unimp"); | |
65 | ||
66 | vectors[VEC_UNIMPII] = unimp_vec; | |
67 | } | |
68 | ||
69 | vectors[VEC_BUSERR] = buserr; | |
70 | vectors[VEC_ILLEGAL] = trap; | |
71 | vectors[VEC_SYS] = system_call; | |
72 | } | |
73 | ||
74 | void __init trap_init (void) | |
75 | { | |
76 | int i; | |
77 | ||
78 | for (i = VEC_SPUR; i <= VEC_INT7; i++) | |
79 | vectors[i] = bad_inthandler; | |
80 | ||
81 | for (i = 0; i < VEC_USER; i++) | |
82 | if (!vectors[i]) | |
83 | vectors[i] = trap; | |
84 | ||
85 | for (i = VEC_USER; i < 256; i++) | |
86 | vectors[i] = bad_inthandler; | |
87 | ||
88 | #ifdef CONFIG_M68KFPU_EMU | |
89 | if (FPU_IS_EMU) | |
90 | vectors[VEC_LINE11] = fpu_emu; | |
91 | #endif | |
92 | ||
93 | if (CPU_IS_040 && !FPU_IS_EMU) { | |
94 | /* set up FPSP entry points */ | |
95 | asmlinkage void dz_vec(void) asm ("dz"); | |
96 | asmlinkage void inex_vec(void) asm ("inex"); | |
97 | asmlinkage void ovfl_vec(void) asm ("ovfl"); | |
98 | asmlinkage void unfl_vec(void) asm ("unfl"); | |
99 | asmlinkage void snan_vec(void) asm ("snan"); | |
100 | asmlinkage void operr_vec(void) asm ("operr"); | |
101 | asmlinkage void bsun_vec(void) asm ("bsun"); | |
102 | asmlinkage void fline_vec(void) asm ("fline"); | |
103 | asmlinkage void unsupp_vec(void) asm ("unsupp"); | |
104 | ||
105 | vectors[VEC_FPDIVZ] = dz_vec; | |
106 | vectors[VEC_FPIR] = inex_vec; | |
107 | vectors[VEC_FPOVER] = ovfl_vec; | |
108 | vectors[VEC_FPUNDER] = unfl_vec; | |
109 | vectors[VEC_FPNAN] = snan_vec; | |
110 | vectors[VEC_FPOE] = operr_vec; | |
111 | vectors[VEC_FPBRUC] = bsun_vec; | |
112 | vectors[VEC_LINE11] = fline_vec; | |
113 | vectors[VEC_FPUNSUP] = unsupp_vec; | |
114 | } | |
115 | ||
116 | if (CPU_IS_060 && !FPU_IS_EMU) { | |
117 | /* set up IFPSP entry points */ | |
118 | asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan"); | |
119 | asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr"); | |
120 | asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl"); | |
121 | asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl"); | |
122 | asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz"); | |
123 | asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex"); | |
124 | asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline"); | |
125 | asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp"); | |
126 | asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd"); | |
127 | ||
128 | vectors[VEC_FPNAN] = snan_vec6; | |
129 | vectors[VEC_FPOE] = operr_vec6; | |
130 | vectors[VEC_FPOVER] = ovfl_vec6; | |
131 | vectors[VEC_FPUNDER] = unfl_vec6; | |
132 | vectors[VEC_FPDIVZ] = dz_vec6; | |
133 | vectors[VEC_FPIR] = inex_vec6; | |
134 | vectors[VEC_LINE11] = fline_vec6; | |
135 | vectors[VEC_FPUNSUP] = unsupp_vec6; | |
136 | vectors[VEC_UNIMPEA] = effadd_vec6; | |
137 | } | |
138 | ||
139 | /* if running on an amiga, make the NMI interrupt do nothing */ | |
140 | if (MACH_IS_AMIGA) { | |
141 | vectors[VEC_INT7] = nmihandler; | |
142 | } | |
143 | } | |
144 |