1 /* $NetBSD: locore.S,v 1.5 2009/02/13 22:41:03 apb Exp $ */
2 /* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
5 * Copyright 2001 Wasabi Systems, Inc.
8 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed for the NetBSD Project by
21 * Wasabi Systems, Inc.
22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
23 * or promote products derived from this software without specific prior
26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
40 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
41 * Copyright (C) 1995, 1996 TooLs GmbH.
42 * All rights reserved.
44 * Redistribution and use in source and binary forms, with or without
45 * modification, are permitted provided that the following conditions
47 * 1. Redistributions of source code must retain the above copyright
48 * notice, this list of conditions and the following disclaimer.
49 * 2. Redistributions in binary form must reproduce the above copyright
50 * notice, this list of conditions and the following disclaimer in the
51 * documentation and/or other materials provided with the distribution.
52 * 3. All advertising materials mentioning features or use of this software
53 * must display the following acknowledgement:
54 * This product includes software developed by TooLs GmbH.
55 * 4. The name of TooLs GmbH may not be used to endorse or promote products
56 * derived from this software without specific prior written permission.
58 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
59 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
60 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
61 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
62 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
63 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
64 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
65 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
66 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
67 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
70 #undef PPC_4XX_NOCACHE
74 #include "opt_ipkdb.h"
75 #include "opt_lockdebug.h"
76 #include "opt_modular.h"
77 #include "opt_multiprocessor.h"
78 #include "opt_ppcarch.h"
79 #include "opt_ppcparam.h"
83 #include <sys/syscall.h>
85 #include <machine/param.h>
86 #include <machine/psl.h>
87 #include <machine/trap.h>
88 #include <machine/asm.h>
90 #include <powerpc/spr.h>
91 #include <powerpc/ibm4xx/dcr405gp.h>
92 #include <powerpc/ibm4xx/pmap.h>
94 /* Function pointer for requesting board_config_data from openbios*/
95 #define BOARD_CFG_FP 0xFFFE0B50
98 * Some instructions gas doesn't understand (yet?)
100 #define bdneq bdnzf 2,
106 .asciz "clock", "irq1", "irq2", "irq3"
107 .asciz "irq4", "irq5", "irq6", "irq7"
108 .asciz "irq8", "irq9", "irq10", "irq11"
109 .asciz "irq12", "irq13", "irq14", "irq15"
110 .asciz "irq16", "irq17", "irq18", "irq19"
111 .asciz "irq20", "irq21", "irq22", "irq23"
112 .asciz "irq24", "irq25", "irq26", "irq27"
113 .asciz "irq28", "softnet", "softclock", "softserial"
118 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
119 .long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
124 * This symbol is here for the benefit of kvm_mkdb, and is supposed to
125 * mark the start of kernel text.
128 .globl _C_LABEL(kernel_text)
129 _C_LABEL(kernel_text):
132 * Startup entry. Note, this must be the first thing in the text
139 /* Reserve some space for info_block required for IBM eval board bootloader */
152 /* Get the board_config_data from openbios */
153 lis %r3,BOARD_CFG_FP@h
154 ori %r3,%r3,BOARD_CFG_FP@l
157 bctrl /* call the xcoff function */
158 mr %r31,%r3 /* Save value in r31 */
161 mtmsr %r0 /* Disable FPU/MMU/exceptions */
164 /* PPC405GP errata, item #58.
165 * Load string instructions may write incorrect data into the last GPR
166 * targeted in the operation.
167 * Workaround: set OCM0_DSCNTL[DSEN]=0 and OCM0_DSCNTL[DOF]=0 */
168 mtdcr DCR_OCM0_DSCNTL, %r0 /* Disable Data access to OCM */
169 mtdcr DCR_OCM0_ISCNTL, %r0 /* Disable Instruction access to OCM. Just in case */
175 #ifdef PPC_4XX_NOCACHE
176 /* Disable all caches for physical addresses */
179 /* Allow cacheing for only the first 2GB of RAM */
185 /* Invalidate all TLB entries */
189 /* get start of bss */
190 lis %r3,_C_LABEL(_edata)-4@ha
191 addi %r3,%r3,_C_LABEL(_edata)-4@l
192 /* get end of kernel memory */
193 lis %r8,_C_LABEL(end)@ha
194 addi %r8,%r8,_C_LABEL(end)@l
201 #if NKSYMS || defined(DDB) || defined(MODULAR)
202 /* If we had symbol table location we'd store it here and would've adjusted r8 here */
203 lis %r7,_C_LABEL(startsym)@ha
204 addi %r7,%r7,_C_LABEL(startsym)@l
206 lis %r7,_C_LABEL(endsym)@ha
207 addi %r7,%r7,_C_LABEL(endsym)@l
211 /* Set kernel MMU context. */
216 INIT_CPUINFO(8,1,9,0)
220 addi %r3,%r3,__start@l
222 mr %r6,%r31 /* info_block address */
226 loop: b loop /* XXX not reached */
228 #include <powerpc/ibm4xx/4xx_locore.S>