1/* $NetBSD: locore.S,v 1.49 2014/11/09 00:05:06 chs 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/psl.h> 46#include <machine/trap.h> 47#include <machine/asm.h> 48 49#include <powerpc/spr.h> 50#include <powerpc/oea/spr.h> 51 52#include "ksyms.h" 53 54/* 55 * Some instructions gas doesn't understand (yet?) 56 */ 57#define bdneq bdnzf 2, 58 59/* 60 * Globals 61 */ 62 .data 63GLOBAL(esym) 64 .long 0 /* end of symbol table */ 65GLOBAL(oeacpufeat) 66 .long 0 /* cpu features */ 67 68/* 69 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 70 * mark the start of kernel text. 71 */ 72 .text 73 .globl _C_LABEL(kernel_text) 74_C_LABEL(kernel_text): 75 76/* 77 * Startup entry. Note, this must be the first thing in the text 78 * segment! 79 */ 80 .text 81 .globl __start 82__start: 83 mr %r13,%r6 84 mr %r14,%r7 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 mr %r6,%r13 110 mr %r7,%r14 111 cmpwi %r6,0 112 beq 1f 113 add %r9,%r6,%r7 /* r9 = args + l */ 114 lwz %r9,-8(%r9) /* esym */ 115 cmpwi %r9,0 116 beq 1f 117 mr %r4,%r9 1181: 119#endif 120 121 122 /* 123 * Initialize cpu_info[0] 124 */ 125 INIT_CPUINFO(%r4,%r1,%r9,%r0) 126 127 lis %r3,__start@ha 128 addi %r3,%r3,__start@l 129 mr %r5,%r6 /* args string */ 130 bl _C_LABEL(initppc) 131 bl _C_LABEL(main) 132 b _C_LABEL(OF_exit) 133 134/* 135 * Pull in common OFW code. 136 */ 137#include <powerpc/oea/ofw_subr.S> 138 139/* 140 * Pull in common switch / setfault code. 141 */ 142#include <powerpc/powerpc/locore_subr.S> 143 144/* 145 * Pull in common trap vector code. 146 */ 147#include <powerpc/powerpc/trap_subr.S> 148 149/* 150 * Pull in common pio / bus_space code. 151 */ 152#include <powerpc/powerpc/pio_subr.S> 153