1 /* $FreeBSD$ */
2 /* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
3
4 /*-
5 * Copyright (C) 2001 Benno Rice
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
26 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28 /*-
29 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
30 * Copyright (C) 1995, 1996 TooLs GmbH.
31 * All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 * notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 * notice, this list of conditions and the following disclaimer in the
40 * documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 * must display the following acknowledgement:
43 * This product includes software developed by TooLs GmbH.
44 * 4. The name of TooLs GmbH may not be used to endorse or promote products
45 * derived from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
48 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
49 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
50 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
51 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
52 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
53 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
54 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
55 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
56 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
57 */
58
59 #include "assym.s"
60
61 #include <sys/syscall.h>
62
63 #include <machine/trap.h>
64 #include <machine/param.h>
65 #include <machine/spr.h>
66 #include <machine/asm.h>
67
68 /* Locate the per-CPU data structure */
69 #define GET_CPUINFO(r) \
70 mfsprg0 r
71
72 /*
73 * Compiled KERNBASE location and the kernel load address
74 */
75 .globl kernbase
76 .set kernbase, KERNBASE
77
78 #define TMPSTKSZ 8192 /* 8K temporary stack */
79
80 /*
81 * Globals
82 */
83 .data
84 .align 4
85 GLOBAL(tmpstk)
86 .space TMPSTKSZ
87 GLOBAL(esym)
88 .long 0 /* end of symbol table */
89
90 #define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */
91 GLOBAL(intrnames)
92 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
93 GLOBAL(sintrnames)
94 .long INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
95
96 .align 4
97 GLOBAL(intrcnt)
98 .space INTRCNT_COUNT * 4 * 2
99 GLOBAL(sintrcnt)
100 .long INTRCNT_COUNT * 4 * 2
101
102 .text
103 .globl btext
104 btext:
105
106 /*
107 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
108 * mark the start of kernel text.
109 */
110 .globl kernel_text
111 kernel_text:
112
113 /*
114 * Startup entry. Note, this must be the first thing in the text
115 * segment!
116 */
117 .text
118 .globl __start
119 __start:
120 li 8,0
121 li 9,0x100
122 mtctr 9
123 1:
124 dcbf 0,8
125 icbi 0,8
126 addi 8,8,0x20
127 bdnz 1b
128 sync
129 isync
130
131 /* Save the argument pointer and length */
132 mr 20,6
133 mr 21,7
134
135 lis 8,openfirmware_entry@ha
136 stw 5,openfirmware_entry@l(8) /* save client interface handler */
137
138 lis 1,(tmpstk+TMPSTKSZ-16)@ha
139 addi 1,1,(tmpstk+TMPSTKSZ-16)@l
140
141 mfmsr 0
142 lis 9,ofmsr@ha
143 stwu 0,ofmsr@l(9)
144
145 mfsprg0 0 /* save SPRG0-3 */
146 stw 0,4(9) /* ofmsr[1] = sprg0 */
147 mfsprg1 0
148 stw 0,8(9) /* ofmsr[2] = sprg1 */
149 mfsprg2 0
150 stw 0,12(9) /* ofmsr[3] = sprg2 */
151 mfsprg3 0
152 stw 0,16(9) /* ofmsr[4] = sprg3 */
153
154 bl OF_initial_setup
155
156 lis 4,end@ha
157 addi 4,4,end@l
158 mr 5,4
159
160 lis 3,kernel_text@ha
161 addi 3,3,kernel_text@l
162
163 /* Restore the argument pointer and length */
164 mr 6,20
165 mr 7,21
166
167 bl powerpc_init
168 mr %r1, %r3
169 li %r3, 0
170 stw %r3, 0(%r1)
171 bl mi_startup
172 b OF_exit
173
174 /*
175 * int setfault()
176 *
177 * Similar to setjmp to setup for handling faults on accesses to user memory.
178 * Any routine using this may only call bcopy, either the form below,
179 * or the (currently used) C code optimized, so it doesn't use any non-volatile
180 * registers.
181 */
182 .globl setfault
183 setfault:
184 mflr 0
185 mfcr 12
186 mfsprg 4,0
187 lwz 4,TD_PCB(2) /* curthread = r2 */
188 stw 3,PCB_ONFAULT(4)
189 stw 0,0(3)
190 stw 1,4(3)
191 stw 2,8(3)
192 stmw 12,12(3)
193 xor 3,3,3
194 blr
195
196 #include <powerpc/aim/trap_subr32.S>
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