wii_locore.S revision 1.2
1/* $NetBSD: wii_locore.S,v 1.2 2024/01/24 21:53:34 jmcneill 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_kgdb.h" 37#include "opt_ppcparam.h" 38#include "assym.h" 39 40#include <sys/syscall.h> 41 42#include <machine/param.h> 43#include <machine/psl.h> 44#include <machine/trap.h> 45#include <machine/asm.h> 46 47#include <powerpc/spr.h> 48#include <powerpc/oea/spr.h> 49#include <powerpc/oea/hid.h> 50 51#include "ksyms.h" 52 53/* 54 * Some instructions gas doesn't understand (yet?) 55 */ 56#define bdneq bdnzf 2, 57 58/* 59 * Globals 60 */ 61GLOBAL(startsym) 62 .long 0 /* start symbol table */ 63GLOBAL(endsym) 64 .long 0 /* end symbol table */ 65/* 66 * This symbol is here for the benefit of kvm_mkdb, and is supposed to 67 * mark the start of kernel text. 68 */ 69 .text 70 .globl _C_LABEL(kernel_text) 71_C_LABEL(kernel_text): 72 73/* 74 * Startup entry. Note, this must be the first thing in the text 75 * segment! 76 */ 77 .text 78 .globl __start 79__start: 80 b __mmu_init 81 82 /* 83 * Command-line argument protocol supported by HBC. 84 */ 85 .long 0x5f617267 /* WII_ARGV_MAGIC */ 86 .globl _C_LABEL(wii_argv) 87_C_LABEL(wii_argv): 88 .long 0 /* argv magic, set by loader */ 89 .long 0 /* command line */ 90 .long 0 /* command line length */ 91 .long 0 /* argc */ 92 .long 0 /* argv */ 93 .long 0 /* end of argv */ 94 95__mmu_init: 96 /* reset MMU to a known state */ 97#include "wii_mmuinit.S" 98 99 /* compute end of kernel memory */ 100 lis 4,_C_LABEL(end)@ha 101 addi 4,4,_C_LABEL(end)@l 102 rlwinm 4,4,0,1,31 103 104 INIT_CPUINFO(4,1,9,5) 105 106 lis 3,__start@ha 107 addi 3,3,__start@l 108 rlwinm 3,3,0,1,31 109 110 xor 5,5,5 111 xor 6,6,6 112 bl _C_LABEL(cpu_model_init) 113 bl _C_LABEL(initppc) 114 115 sync 116 isync 117 mfspr 8,SPR_HID0 118 ori 8, 8, (HID0_ICE | HID0_DCE)@l 119 isync 120 mtspr SPR_HID0,8 121 sync 122 isync 123 124 bl _C_LABEL(main) 125 126loop: b loop /* XXX not reached */ 127 128 .globl _C_LABEL(enable_intr) 129_C_LABEL(enable_intr): 130 mfmsr 3 131 ori 3,3,PSL_EE@l 132 mtmsr 3 133 blr 134 135 .globl _C_LABEL(disable_intr) 136_C_LABEL(disable_intr): 137 mfmsr 3 138 andi. 3,3,~PSL_EE@l 139 mtmsr 3 140 blr 141 142/* 143 * Include common switch / setfault code 144 */ 145#include <powerpc/powerpc/locore_subr.S> 146 147/* 148 * Include common trap / exception code 149 */ 150#include <powerpc/powerpc/trap_subr.S> 151 152/* 153 * Include PIO routines 154 */ 155#include <powerpc/powerpc/pio_subr.S> 156