xref: /freebsd/sys/powerpc/aim/locore.S (revision 1e413cf93298b5b97441a21d9a50fdcd0ee9945e)
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
78GLOBAL(tmpstk)
79	.space	8208
80GLOBAL(esym)
81	.long	0			/* end of symbol table */
82
83GLOBAL(ofmsr)
84	.long	0, 0, 0, 0, 0		/* msr/sprg0-3 used in Open Firmware */
85
86GLOBAL(powersave)
87	.long	0
88
89#define	INTSTK		16384		/* 16K interrupt stack */
90#define	INTRCNT_COUNT	256		/* max(HROWPIC_IRQMAX,OPENPIC_IRQMAX) */
91GLOBAL(intrnames)
92	.space	INTRCNT_COUNT * (MAXCOMLEN + 1) * 2
93GLOBAL(eintrnames)
94	.align 4
95GLOBAL(intrcnt)
96	.space	INTRCNT_COUNT * 4 * 2
97GLOBAL(eintrcnt)
98
99/*
100 * File-scope for locore.S
101 */
102idle_u:
103	.long	0			/* fake uarea during idle after exit */
104openfirmware_entry:
105	.long	0			/* Open Firmware entry point */
106srsave:
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
115kernel_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
1301:
131#endif
132	li	8,0
133	li	9,0x100
134	mtctr	9
1351:
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
194setfault:
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/aim/trap_subr.S>
209