1/*	$NetBSD: ev64260_locore.S,v 1.17 2011/02/01 01:24:04 matt Exp $	*/
2/*	$OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $	*/
3
4/*
5 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
6 * Copyright (C) 1995, 1996 TooLs GmbH.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by TooLs GmbH.
20 * 4. The name of TooLs GmbH may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
27 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
29 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
31 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
32 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include "opt_ddb.h"
36#include "opt_ppcparam.h"
37#include "opt_ipkdb.h"
38#include "opt_modular.h"
39#include "opt_multiprocessor.h"
40#include "opt_openpic.h"
41#include "assym.h"
42
43#include <sys/syscall.h>
44
45#include <machine/param.h>
46#include <machine/vmparam.h>
47#include <machine/pmap.h>
48#include <machine/psl.h>
49#include <machine/trap.h>
50#include <machine/asm.h>
51
52#include <powerpc/spr.h>
53#include <powerpc/oea/spr.h>
54#include <powerpc/oea/bat.h>
55#include <powerpc/oea/hid.h>
56
57/*
58 * Some instructions gas doesn't understand (yet?)
59 */
60#define	bdneq	bdnzf 2,
61
62/*
63 * Globals
64 */
65GLOBAL(startsym)
66	.long	0			/* start symbol table */
67GLOBAL(endsym)
68	.long	0			/* end symbol table */
69GLOBAL(oeacpufeat)
70	.long	0			/* cpu features */
71/*
72 * File-scope for locore.S
73 */
74#ifdef DINK
75	.data
76dink_return:
77	.long	0			/* fake uarea during idle after exit */
78dink_stack:
79	.long	0			/* fake uarea during idle after exit */
80#endif
81
82
83/*
84 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
85 * mark the start of kernel text.
86 */
87	.text
88	.globl	_C_LABEL(kernel_text)
89_C_LABEL(kernel_text):
90
91/*
92 * Startup entry.  Note, this must be the first thing in the text
93 * segment!
94 */
95	.text
96	.globl	__start
97__start:
98#ifdef DINK
99	mflr	0
100	lis	8, dink_stack@ha
101	stw	1, dink_stack@l(8)
102	lis	8, dink_return@ha
103	stw	0, dink_return@l(8)
104#endif
105
106#if 0
107	eieio; sync
108	lis	8, 0xf100f104@ha
109	lwz	7, -3836(8)
110	li	0, 1
111	andc	7,7,0
112	stw	7, -3836(8)
113	eieio; sync
114#endif
115
116	/*
117	 * Make sure that .bss is zeroed.
118	 */
119	li	0,0
120	lis	8,edata@ha
121	addi	8,8,edata@l
122	lis	9,end@ha
123	addi	9,9,end@l
1245:	cmpw	0,8,9			/* edata & end are >= word aligned */
125	bge	6f
126	stw	0,0(8)
127	addi	8,8,4
128	b	5b
1296:
130
131	li	0,0
132	mtmsr	0			/* Disable FPU/MMU/exceptions */
133	sync ; isync
134
135#if 1
136	mfpvr	0
137	srwi	0,0,16
138	cmplwi	0,MPC7410
139	bne	16f
140
141#if 0
142	/* flush and disable L2 */
143	mfspr	8,SPR_L2CR
144	lis	0,(L2CR_L2E|L2CR_L2WT)@h	/* disable the L2 mode */
145	andc	8,8,0
146	ori	8,8,L2CR_L2HWF		/* enable hardware flush */
147	sync
148	mtspr	SPR_L2CR,8		/* do it */
149	sync				/* wait for it to finish */
150
151	/* Disable data lock mode */
152	mfspr	8,SPR_HID0
153	li	0,HID0_DLOCK
154	andc	8,8,0
155	mtspr	SPR_HID0,8
156	sync
157#endif
158#if 0
159	/*
160	 * Flush the L1 cache
161	 */
162	mfspr	8,SPR_MSSCR0
163	oris	8,8,MSSCR0_DL1HWF@h
164	sync
165	mtspr	SPR_MSSCR0,8
166	sync
167#endif
168#if 1
169	/* disable data and instruction caches */
170	mfspr	8,SPR_HID0
171	li	0,HID0_DLOCK@l
172	andc	8,8,0
173	sync
174	mtspr	SPR_HID0,8
175	sync
176	isync
177#endif
1787:
179#if 0
180	/* disable data and instruction caches */
181	mfspr	8,SPR_HID0
182	li	0,(HID0_ICE|HID0_DCE)@l
183	andc	8,8,0
184	sync
185	mtspr	SPR_HID0,8
186	sync
187	isync
188#endif
1897:
190#if 0
191	/* Enable and flush data and instruction caches */
192	ori	8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE)
193#	ori	8,8,(HID0_ICFI|HID0_ICE)
194	mtspr	SPR_HID0,8
195	isync
1968:	sync
197	mfspr	8,SPR_HID0
198	andi.	0,8,(HID0_ICFI|HID0_DCFI)
199	bne	8b
200#endif
201
202#if 0
203	mfspr	8,SPR_L2CR
204	oris	8,8,L2CR_L2E@h
205	sync
206	mtspr	SPR_L2CR,8
207	sync
208#endif
20916:
210#endif
211
212/* compute end of kernel memory */
213	lis	8,_C_LABEL(end)@ha
214	addi	8,8,_C_LABEL(end)@l
215#if NKSYMS || defined(DDB) || defined(MODULAR)
216	lis	7,_C_LABEL(startsym)@ha
217	addi	7,7,_C_LABEL(startsym)@l
218	stw	3,0(7)
219	lis	7,_C_LABEL(endsym)@ha
220	addi	7,7,_C_LABEL(endsym)@l
221	stw	4,0(7)
222/*	mr	8,4			* end of symbol table */
223#endif
224	mr	4,8			/* end of mem reserved for kernel */
225	INIT_CPUINFO(4,1,9,0)
226
227	lis	3,__start@ha
228	addi	3,3,__start@l
229	li	5,0
230	li	6,0
231
232	bl	_C_LABEL(cpu_model_init)
233	bl	_C_LABEL(initppc)
234	bl	_C_LABEL(main)
235
236loop:	b	loop			/* XXX not reached */
237
238#if 0
239	.globl	_C_LABEL(extintr_enable)
240_C_LABEL(extintr_enable):
241	mfmsr	3
242	ori	3,3,PSL_EE@l
243	sync
244	mtmsr	3
245	blr
246
247	.globl	_C_LABEL(extintr_restore)
248_C_LABEL(extintr_restore):
249	mfmsr	4
250	or	3,4,3
251	sync
252	mtmsr	3
253	blr
254
255	.globl	_C_LABEL(extintr_disable)
256_C_LABEL(extintr_disable):
257	mfmsr	3
258	andi.	4,3,~PSL_EE@l
259	sync
260	mtmsr	4
261	andi.	3,3,PSL_EE@l
262	blr
263
264	.globl	_C_LABEL(mvpppc_reboot)
265_C_LABEL(mvpppc_reboot):
266	mfmsr	3
267	ori	3,3,PSL_IP@l
268	sync
269	mtmsr	3
270	b	0xFFF00100
271#endif
272
273#ifdef DINK
274	.globl	_C_LABEL(return_to_dink)
275_C_LABEL(return_to_dink):
276	sync
277	lis	4, dink_stack@ha
278	lwz	1, dink_stack@l(4)
279	lis	4, dink_return@ha
280	lwz	5, dink_return@l(4)
281	mtlr	5
282	blr
283#endif
284
285/*
286 * Include common switch / setfault code
287 */
288#include <powerpc/powerpc/locore_subr.S>
289
290/*
291 * Include common trap / exception code
292 */
293#include <powerpc/powerpc/trap_subr.S>
294
295/*
296 * Include PIO routines
297 */
298#include <powerpc/powerpc/pio_subr.S>
299