4 * Copyright (C) 1993, 1994 by Hamish Macdonald
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
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
18 * Sets up all exception vectors
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>
27 #include <asm/setup.h>
29 #include <asm/traps.h>
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);
42 e_vector vectors[256];
44 /* nmi handler for the Amiga */
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).
54 void __init base_trap_init(void)
57 extern e_vector *sun3x_prom_vbr;
59 __asm__ volatile ("movec %%vbr, %0" : "=r" (sun3x_prom_vbr));
62 /* setup the exception vector table */
63 __asm__ volatile ("movec %0,%%vbr" : : "r" ((void*)vectors));
66 /* set up ISP entry points */
67 asmlinkage void unimp_vec(void) asm ("_060_isp_unimp");
69 vectors[VEC_UNIMPII] = unimp_vec;
72 vectors[VEC_BUSERR] = buserr;
73 vectors[VEC_ILLEGAL] = trap;
74 vectors[VEC_SYS] = system_call;
77 void __init trap_init (void)
81 for (i = VEC_SPUR; i <= VEC_INT7; i++)
82 vectors[i] = bad_inthandler;
84 for (i = 0; i < VEC_USER; i++)
88 for (i = VEC_USER; i < 256; i++)
89 vectors[i] = bad_inthandler;
91 #ifdef CONFIG_M68KFPU_EMU
93 vectors[VEC_LINE11] = fpu_emu;
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");
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;
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");
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;
142 /* if running on an amiga, make the NMI interrupt do nothing */
144 vectors[VEC_INT7] = nmihandler;