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/cpu.h>
21 #include <linux/sched.h>
22 #include <linux/kernel.h>
23 #include <linux/linkage.h>
24 #include <linux/init.h>
25 #include <linux/kallsyms.h>
26
27 #include <asm/setup.h>
28 #include <asm/fpu.h>
29 #include <asm/traps.h>
30
31 #include "vectors.h"
32
33 /* assembler routines */
34 asmlinkage void system_call(void);
35 asmlinkage void buserr(void);
36 asmlinkage void trap(void);
37 asmlinkage void nmihandler(void);
38 #ifdef CONFIG_M68KFPU_EMU
39 asmlinkage void fpu_emu(void);
40 #endif
41
42 e_vector vectors[256];
43
44 /* nmi handler for the Amiga */
45 asm(".text\n"
46 __ALIGN_STR "\n"
47 "nmihandler: rte");
48
49 /*
50 * this must be called very early as the kernel might
51 * use some instruction that are emulated on the 060
52 * and so we're prepared for early probe attempts (e.g. nf_init).
53 */
54 void __init base_trap_init(void)
55 {
56 if (MACH_IS_SUN3X) {
57 extern e_vector *sun3x_prom_vbr;
58
59 __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr));
60 }
61
62 /* setup the exception vector table */
63 __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
64
65 if (CPU_IS_060) {
66 /* set up ISP entry points */
67 asmlinkage void unimp_vec(void) asm ("_060_isp_unimp");
68
69 vectors[VEC_UNIMPII] = unimp_vec;
70 }
71
72 vectors[VEC_BUSERR] = buserr;
73 vectors[VEC_ILLEGAL] = trap;
74 vectors[VEC_SYS] = system_call;
75 }
76
77 void __init trap_init (void)
78 {
79 int i;
80
81 for (i = VEC_SPUR; i <= VEC_INT7; i++)
82 vectors[i] = bad_inthandler;
83
84 for (i = 0; i < VEC_USER; i++)
85 if (!vectors[i])
86 vectors[i] = trap;
87
88 for (i = VEC_USER; i < 256; i++)
89 vectors[i] = bad_inthandler;
90
91 #ifdef CONFIG_M68KFPU_EMU
92 if (FPU_IS_EMU)
93 vectors[VEC_LINE11] = fpu_emu;
94 #endif
95
96 if (CPU_IS_040 && !FPU_IS_EMU) {
97 /* set up FPSP entry points */
98 asmlinkage void dz_vec(void) asm ("dz");
99 asmlinkage void inex_vec(void) asm ("inex");
100 asmlinkage void ovfl_vec(void) asm ("ovfl");
101 asmlinkage void unfl_vec(void) asm ("unfl");
102 asmlinkage void snan_vec(void) asm ("snan");
103 asmlinkage void operr_vec(void) asm ("operr");
104 asmlinkage void bsun_vec(void) asm ("bsun");
105 asmlinkage void fline_vec(void) asm ("fline");
106 asmlinkage void unsupp_vec(void) asm ("unsupp");
107
108 vectors[VEC_FPDIVZ] = dz_vec;
109 vectors[VEC_FPIR] = inex_vec;
110 vectors[VEC_FPOVER] = ovfl_vec;
111 vectors[VEC_FPUNDER] = unfl_vec;
112 vectors[VEC_FPNAN] = snan_vec;
113 vectors[VEC_FPOE] = operr_vec;
114 vectors[VEC_FPBRUC] = bsun_vec;
115 vectors[VEC_LINE11] = fline_vec;
116 vectors[VEC_FPUNSUP] = unsupp_vec;
117 }
118
119 if (CPU_IS_060 && !FPU_IS_EMU) {
120 /* set up IFPSP entry points */
121 asmlinkage void snan_vec6(void) asm ("_060_fpsp_snan");
122 asmlinkage void operr_vec6(void) asm ("_060_fpsp_operr");
123 asmlinkage void ovfl_vec6(void) asm ("_060_fpsp_ovfl");
124 asmlinkage void unfl_vec6(void) asm ("_060_fpsp_unfl");
125 asmlinkage void dz_vec6(void) asm ("_060_fpsp_dz");
126 asmlinkage void inex_vec6(void) asm ("_060_fpsp_inex");
127 asmlinkage void fline_vec6(void) asm ("_060_fpsp_fline");
128 asmlinkage void unsupp_vec6(void) asm ("_060_fpsp_unsupp");
129 asmlinkage void effadd_vec6(void) asm ("_060_fpsp_effadd");
130
131 vectors[VEC_FPNAN] = snan_vec6;
132 vectors[VEC_FPOE] = operr_vec6;
133 vectors[VEC_FPOVER] = ovfl_vec6;
134 vectors[VEC_FPUNDER] = unfl_vec6;
135 vectors[VEC_FPDIVZ] = dz_vec6;
136 vectors[VEC_FPIR] = inex_vec6;
137 vectors[VEC_LINE11] = fline_vec6;
138 vectors[VEC_FPUNSUP] = unsupp_vec6;
139 vectors[VEC_UNIMPEA] = effadd_vec6;
140 }
141
142 /* if running on an amiga, make the NMI interrupt do nothing */
143 if (MACH_IS_AMIGA) {
144 vectors[VEC_INT7] = nmihandler;
145 }
146 }
147
148
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