1/* $NetBSD: locore.S,v 1.46 2011/01/17 08:23:56 matt Exp $ */ 2 3/* 4 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 5 * Copyright (C) 1995, 1996 TooLs GmbH. 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 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by TooLs GmbH. 19 * 4. The name of TooLs GmbH may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34#include "opt_ddb.h" 35#include "opt_ipkdb.h" 36#include "opt_lockdebug.h" 37#include "opt_modular.h" 38#include "opt_multiprocessor.h" 39#include "opt_ppcparam.h" 40#include "assym.h" 41 42#include <sys/syscall.h> 43 44#include <machine/param.h> 45#include <machine/pmap.h> 46#include <machine/psl.h> 47#include <machine/trap.h> 48#include <machine/asm.h> 49#include <machine/vmparam.h> 50 51#include <powerpc/spr.h> 52#include <powerpc/oea/spr.h> 53 54#include "ksyms.h" 55 56/* 57 * Some instructions gas doesn't understand (yet?) 58 */ 59#define bdneq bdnzf 2, 60 61/* 62 * Globals 63 */ 64 .data 65GLOBAL(esym) 66 .long 0 /* end of symbol table */ 67GLOBAL(oeacpufeat) 68 .long 0 /* cpu features */ 69 70/* 71 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 72 * mark the start of kernel text. 73 */ 74 .text 75 .globl _C_LABEL(kernel_text) 76_C_LABEL(kernel_text): 77 78/* 79 * Startup entry. Note, this must be the first thing in the text 80 * segment! 81 */ 82 .text 83 .globl __start 84__start: 85 bl _C_LABEL(ofwinit) /* init our OF hooks */ 86 87 li %r0,0 88 mtmsr %r0 /* Disable FPU/MMU/exceptions */ 89 90 bl _C_LABEL(cpu_model_init) 91 lis %r12,oeacpufeat@ha 92 lwz %r12,oeacpufeat@l(%r12) 93 andi. %r12,%r12,OEACPU_64_BRIDGE /* Compare against OEACPU_64_BRIDGE */ 94 beq 2f /* skip if this is a 32bit part */ 95 li %r0,0 96 sync 97 slbia /* invalidate the slb table */ 98 sync 99 clrldi %r0,%r0,32 /* clear SF/ISF (high order bits) */ 100 mtmsrd %r0 101 mtspr 0x118,0 /* clear ASR[V] to enable segregs */ 1022: 103 isync 104 /* compute end of kernel memory */ 105 lis %r4,_C_LABEL(end)@ha 106 addi %r4,%r4,_C_LABEL(end)@l 107#if NKSYMS || defined(DDB) || defined(MODULAR) 108 /* skip symbol table */ 109 cmpwi %r6,0 110 beq 1f 111 add %r9,%r6,%r7 /* r9 = args + l */ 112 lwz %r9,-8(%r9) /* esym */ 113 cmpwi %r9,0 114 beq 1f 115 mr %r4,%r9 1161: 117#endif 118 119 120 /* 121 * Initialize cpu_info[0] 122 */ 123 INIT_CPUINFO(%r4,%r1,%r9,%r0) 124 125 lis %r3,__start@ha 126 addi %r3,%r3,__start@l 127 mr %r5,%r6 /* args string */ 128 bl _C_LABEL(initppc) 129 bl _C_LABEL(main) 130 b _C_LABEL(OF_exit) 131 132/* 133 * Pull in common OFW code. 134 */ 135#include <powerpc/oea/ofw_subr.S> 136 137/* 138 * Pull in common switch / setfault code. 139 */ 140#include <powerpc/powerpc/locore_subr.S> 141 142/* 143 * Pull in common trap vector code. 144 */ 145#include <powerpc/powerpc/trap_subr.S> 146 147/* 148 * Pull in common pio / bus_space code. 149 */ 150#include <powerpc/powerpc/pio_subr.S> 151