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/sr.h>
66 #include <machine/spr.h>
67 #include <machine/psl.h>
68 #include <machine/asm.h>
69
70 /* Locate the per-CPU data structure */
71 #define GET_CPUINFO(r) \
72 mfsprg0 r
73
74 /*
75 * Globals
76 */
77 .data
78 GLOBAL(tmpstk)
79 .space 8208
80 GLOBAL(esym)
81 .long 0 /* end of symbol table */
82
83 GLOBAL(ofmsr)
84 .long 0, 0, 0, 0, 0 /* msr/sprg0-3 used in Open Firmware */
85
86 GLOBAL(powersave)
87 .long 0
88
89 #define INTSTK 16384 /* 16K interrupt stack */
90 #define INTRCNT_COUNT 256 /* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */
91 GLOBAL(intrnames)
92 .space INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
93 GLOBAL(eintrnames)
94 .align 4
95 GLOBAL(intrcnt)
96 .space INTRCNT_COUNT * 4 * 2
97 GLOBAL(eintrcnt)
98
99 /*
100 * File-scope for locore.S
101 */
102 idle_u:
103 .long 0 /* fake uarea during idle after exit */
104 openfirmware_entry:
105 .long 0 /* Open Firmware entry point */
106 srsave:
107 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
108
109 /*
110 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
111 * mark the start of kernel text.
112 */
113 .text
114 .globl kernel_text
115 kernel_text:
116
117 /*
118 * Startup entry. Note, this must be the first thing in the text
119 * segment!
120 */
121 .text
122 .globl __start
123 __start:
124 #ifdef FIRMWORKSBUGS
125 mfmsr 0
126 andi. 0,0,PSL_IR|PSL_DR
127 beq 1f
128
129 bl ofwr_init
130 1:
131 #endif
132 li 8,0
133 li 9,0x100
134 mtctr 9
135 1:
136 dcbf 0,8
137 icbi 0,8
138 addi 8,8,0x20
139 bdnz 1b
140 sync
141 isync
142
143 /* Save the argument pointer and length */
144 mr 20,6
145 mr 21,7
146
147 lis 8,openfirmware_entry@ha
148 stw 5,openfirmware_entry@l(8) /* save client interface handler */
149 mr 3,5
150
151 lis 1,tmpstk@ha
152 addi 1,1,tmpstk@l
153 addi 1,1,8192
154
155 mfmsr 0
156 lis 9,ofmsr@ha
157 stwu 0,ofmsr@l(9)
158
159 mfsprg0 0 /* save SPRG0-3 */
160 stw 0,4(9) /* ofmsr[1] = sprg0 */
161 mfsprg1 0
162 stw 0,8(9) /* ofmsr[2] = sprg1 */
163 mfsprg2 0
164 stw 0,12(9) /* ofmsr[3] = sprg2 */
165 mfsprg3 0
166 stw 0,16(9) /* ofmsr[4] = sprg3 */
167
168 bl OF_init
169
170 lis 4,end@ha
171 addi 4,4,end@l
172 mr 5,4
173
174 lis 3,kernel_text@ha
175 addi 3,3,kernel_text@l
176
177 /* Restore the argument pointer and length */
178 mr 6,20
179 mr 7,21
180
181 bl powerpc_init
182 bl mi_startup
183 b OF_exit
184
185 /*
186 * int setfault()
187 *
188 * Similar to setjmp to setup for handling faults on accesses to user memory.
189 * Any routine using this may only call bcopy, either the form below,
190 * or the (currently used) C code optimized, so it doesn't use any non-volatile
191 * registers.
192 */
193 .globl setfault
194 setfault:
195 mflr 0
196 mfcr 12
197 mfsprg 4,0
198 lwz 4,PC_CURTHREAD(4)
199 lwz 4,TD_PCB(4)
200 stw 3,PCB_ONFAULT(4)
201 stw 0,0(3)
202 stw 1,4(3)
203 stw 2,8(3)
204 stmw 12,12(3)
205 xor 3,3,3
206 blr
207
208 #include <powerpc/powerpc/trap_subr.S>
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