1 /* $NetBSD: obs200_locore.S,v 1.6 2009/02/13 22:41:01 apb Exp $ */
2 /* Original Tag: locore.S,v 1.1 2003/09/23 15:21:58 shige Exp */
3 /* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
6 * Copyright 2001 Wasabi Systems, Inc.
9 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed for the NetBSD Project by
22 * Wasabi Systems, Inc.
23 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
24 * or promote products derived from this software without specific prior
27 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
28 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37 * POSSIBILITY OF SUCH DAMAGE.
41 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
42 * Copyright (C) 1995, 1996 TooLs GmbH.
43 * All rights reserved.
45 * Redistribution and use in source and binary forms, with or without
46 * modification, are permitted provided that the following conditions
48 * 1. Redistributions of source code must retain the above copyright
49 * notice, this list of conditions and the following disclaimer.
50 * 2. Redistributions in binary form must reproduce the above copyright
51 * notice, this list of conditions and the following disclaimer in the
52 * documentation and/or other materials provided with the distribution.
53 * 3. All advertising materials mentioning features or use of this software
54 * must display the following acknowledgement:
55 * This product includes software developed by TooLs GmbH.
56 * 4. The name of TooLs GmbH may not be used to endorse or promote products
57 * derived from this software without specific prior written permission.
59 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
60 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
61 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
63 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
64 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
65 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
66 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
67 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
68 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
71 #undef PPC_4XX_NOCACHE
75 #include "opt_ipkdb.h"
76 #include "opt_lockdebug.h"
77 #include "opt_modular.h"
78 #include "opt_multiprocessor.h"
79 #include "opt_ppcarch.h"
80 #include "opt_ppcparam.h"
84 #include <sys/syscall.h>
86 #include <machine/param.h>
87 #include <machine/psl.h>
88 #include <machine/trap.h>
89 #include <machine/asm.h>
91 #include <powerpc/spr.h>
92 #include <powerpc/ibm4xx/dcr405gp.h>
93 #include <powerpc/ibm4xx/pmap.h>
95 /* Function pointer for requesting board_config_data from OpenBlockS S/R BIOS */
96 #define BOARD_CFG_FP (0x00100000)
99 * Some instructions gas doesn't understand (yet?)
101 #define bdneq bdnzf 2,
104 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
105 * mark the start of kernel text.
108 .globl _C_LABEL(kernel_text)
109 _C_LABEL(kernel_text):
112 * Startup entry. Note, this must be the first thing in the text
119 /* Reserve some space for info_block required for IBM eval board bootloader */
132 /* Get the board_config_data from openbios */
133 lis %r3,BOARD_CFG_FP@h
134 ori %r3,%r3,BOARD_CFG_FP@l
135 mr %r31,%r3 /* Save value in r31 */
138 mtmsr %r0 /* Disable FPU/MMU/exceptions */
141 /* PPC405GP errata, item #58.
142 * Load string instructions may write incorrect data into the last GPR
143 * targeted in the operation.
144 * Workaround: set OCM0_DSCNTL[DSEN]=0 and OCM0_DSCNTL[DOF]=0 */
145 mtdcr DCR_OCM0_DSCNTL, %r0 /* Disable Data access to OCM */
146 mtdcr DCR_OCM0_ISCNTL, %r0 /* Disable Instruction access to OCM. Just in case */
152 #ifdef PPC_4XX_NOCACHE
153 /* Disable all caches for physical addresses */
156 /* Allow cacheing for only the first 2GB of RAM */
162 /* Invalidate all TLB entries */
166 /* get start of bss */
167 lis %r3,_C_LABEL(_edata)-4@ha
168 addi %r3,%r3,_C_LABEL(_edata)-4@l
169 /* get end of kernel memory */
170 lis %r8,_C_LABEL(end)@ha
171 addi %r8,%r8,_C_LABEL(end)@l
178 #if NKSYMS || defined(DDB) || defined(MODULAR)
179 /* If we had symbol table location we'd store it here and would've adjusted r8 here */
180 lis %r7,_C_LABEL(startsym)@ha
181 addi %r7,%r7,_C_LABEL(startsym)@l
183 lis %r7,_C_LABEL(endsym)@ha
184 addi %r7,%r7,_C_LABEL(endsym)@l
188 /* Set kernel MMU context. */
193 INIT_CPUINFO(8,1,9,0)
197 addi %r3,%r3,__start@l
199 mr %r6,%r31 /* info_block address */
203 loop: b loop /* XXX not reached */
205 #include <powerpc/ibm4xx/4xx_locore.S>