wii_mmuinit.S revision 1.1.2.3
1 1.1.2.3 martin /* $NetBSD: wii_mmuinit.S,v 1.1.2.3 2024/10/14 16:44:42 martin Exp $ */ 2 1.1.2.2 martin 3 1.1.2.2 martin /*- 4 1.1.2.2 martin * Copyright (C) 2012 Margarida Gouveia 5 1.1.2.2 martin * All rights reserved. 6 1.1.2.2 martin * 7 1.1.2.2 martin * Redistribution and use in source and binary forms, with or without 8 1.1.2.2 martin * modification, are permitted provided that the following conditions 9 1.1.2.2 martin * are met: 10 1.1.2.2 martin * 1. Redistributions of source code must retain the above copyright 11 1.1.2.2 martin * notice, this list of conditions and the following disclaimer. 12 1.1.2.2 martin * 2. Redistributions in binary form must reproduce the above copyright 13 1.1.2.2 martin * notice, this list of conditions and the following disclaimer in the 14 1.1.2.2 martin * documentation and/or other materials provided with the distribution. 15 1.1.2.2 martin * 16 1.1.2.2 martin * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 1.1.2.2 martin * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 1.1.2.2 martin * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 1.1.2.2 martin * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 1.1.2.2 martin * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 1.1.2.2 martin * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 1.1.2.2 martin * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 1.1.2.2 martin * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 1.1.2.2 martin * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 1.1.2.2 martin * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.1.2.2 martin * 27 1.1.2.2 martin * $FreeBSD$ 28 1.1.2.2 martin */ 29 1.1.2.2 martin 30 1.1.2.2 martin #include <powerpc/oea/bat.h> 31 1.1.2.2 martin 32 1.1.2.2 martin /* 33 1.1.2.2 martin * When we are invoked from Wii loaders, the state of the MMU and the BAT 34 1.1.2.2 martin * mappings can vary. In this file we try to reset the MMU to a state 35 1.1.2.2 martin * that lets us boot NetBSD. 36 1.1.2.2 martin * 37 1.1.2.2 martin * This file is being included from wii_locore.S. 38 1.1.2.2 martin */ 39 1.1.2.2 martin 40 1.1.2.2 martin #define MMU_REALMODE() \ 41 1.1.2.2 martin mfmsr %r12; \ 42 1.1.2.2 martin rlwinm %r12, %r12, 0, ~(PSL_DR|PSL_IR);\ 43 1.1.2.2 martin sync; \ 44 1.1.2.2 martin bl 1f; \ 45 1.1.2.2 martin 1: \ 46 1.1.2.2 martin mflr %r11; \ 47 1.1.2.2 martin clrlwi %r11, %r11, 3; /* XXX why? */ \ 48 1.1.2.2 martin addi %r11, %r11, 2f - 1b; \ 49 1.1.2.2 martin mtsrr0 %r11; \ 50 1.1.2.2 martin mtsrr1 %r12; /* Disables the MMU */ \ 51 1.1.2.2 martin isync; \ 52 1.1.2.2 martin rfi; \ 53 1.1.2.2 martin 2: 54 1.1.2.2 martin 55 1.1.2.2 martin #define MMU_VIRTUALMODE() \ 56 1.1.2.2 martin bl 3f; \ 57 1.1.2.2 martin 3: \ 58 1.1.2.2 martin mflr %r11; \ 59 1.1.2.2 martin addi %r11, %r11, 4f - 3b; \ 60 1.1.2.2 martin mfmsr %r12; \ 61 1.1.2.2 martin ori %r12, %r12, PSL_DR|PSL_IR; \ 62 1.1.2.2 martin mtsrr0 %r11; \ 63 1.1.2.2 martin mtsrr1 %r12; /* Enables the MMU */ \ 64 1.1.2.2 martin isync; \ 65 1.1.2.2 martin rfi; \ 66 1.1.2.2 martin 4: 67 1.1.2.2 martin 68 1.1.2.2 martin MMU_REALMODE() 69 1.1.2.2 martin 70 1.1.2.3 martin /* Initialize HID0 and HID4 */ 71 1.1.2.3 martin lis %r11, 0x0011 72 1.1.2.3 martin ori %r11, %r11, 0x0c64 73 1.1.2.3 martin mtspr SPR_HID0, %r11 74 1.1.2.3 martin isync 75 1.1.2.3 martin 76 1.1.2.3 martin lis %r11, 0x8200 77 1.1.2.3 martin mtspr 1011, %r11 /* 1011 = SPR_HID4 */ 78 1.1.2.3 martin isync 79 1.1.2.3 martin 80 1.1.2.3 martin mfspr %r11, 920 81 1.1.2.3 martin oris %r11, %r11, 0xa000 82 1.1.2.3 martin mtspr 920, %r11 83 1.1.2.3 martin 84 1.1.2.3 martin mfspr %r11, SPR_HID0 85 1.1.2.3 martin ori %r11, %r11, 0xc000 86 1.1.2.3 martin ori %r11, %r11, 0x0800 87 1.1.2.3 martin ori %r11, %r11, 0x0200 88 1.1.2.3 martin mtspr SPR_HID0, %r11 89 1.1.2.3 martin isync 90 1.1.2.3 martin 91 1.1.2.2 martin /* Reset standard BATs */ 92 1.1.2.2 martin li %r11, 0 93 1.1.2.2 martin mtibatu 0, %r11 94 1.1.2.2 martin mtibatl 0, %r11 95 1.1.2.2 martin mtdbatu 0, %r11 96 1.1.2.2 martin mtdbatl 0, %r11 97 1.1.2.2 martin mtibatu 1, %r11 98 1.1.2.2 martin mtibatl 1, %r11 99 1.1.2.2 martin mtdbatu 1, %r11 100 1.1.2.2 martin mtdbatl 1, %r11 101 1.1.2.2 martin mtibatu 2, %r11 102 1.1.2.2 martin mtibatl 2, %r11 103 1.1.2.2 martin mtdbatu 2, %r11 104 1.1.2.2 martin mtdbatl 2, %r11 105 1.1.2.2 martin mtibatu 3, %r11 106 1.1.2.2 martin mtibatl 3, %r11 107 1.1.2.2 martin mtdbatu 3, %r11 108 1.1.2.2 martin mtdbatl 3, %r11 109 1.1.2.2 martin 110 1.1.2.2 martin /* Reset high BATs. IBAT[4-7][UL] + DBAT[4-7][UL] */ 111 1.1.2.2 martin mtspr 560, %r11 112 1.1.2.2 martin mtspr 561, %r11 113 1.1.2.2 martin mtspr 562, %r11 114 1.1.2.2 martin mtspr 563, %r11 115 1.1.2.2 martin mtspr 564, %r11 116 1.1.2.2 martin mtspr 565, %r11 117 1.1.2.2 martin mtspr 566, %r11 118 1.1.2.2 martin mtspr 567, %r11 119 1.1.2.2 martin mtspr 568, %r11 120 1.1.2.2 martin mtspr 569, %r11 121 1.1.2.2 martin mtspr 570, %r11 122 1.1.2.2 martin mtspr 571, %r11 123 1.1.2.2 martin mtspr 572, %r11 124 1.1.2.2 martin mtspr 573, %r11 125 1.1.2.2 martin mtspr 574, %r11 126 1.1.2.2 martin mtspr 575, %r11 127 1.1.2.2 martin 128 1.1.2.2 martin /* 129 1.1.2.2 martin * We need to setup BAT0 as in mmu_oea.c. 130 1.1.2.2 martin */ 131 1.1.2.2 martin li %r11, BATU(0x00000000, BAT_BL_256M, BAT_Vs) 132 1.1.2.2 martin li %r12, BATL(0x00000000, BAT_M, BAT_PP_RW) 133 1.1.2.2 martin mtdbatu 0, %r11 134 1.1.2.2 martin mtdbatl 0, %r12 135 1.1.2.2 martin mtibatu 0, %r11 136 1.1.2.2 martin mtibatl 0, %r12 137 1.1.2.2 martin isync 138 1.1.2.2 martin 139 1.1.2.2 martin /* 140 1.1.2.2 martin * We use BAT1 to be able to write I/O memory, including the 141 1.1.2.2 martin * framebuffer registers. 142 1.1.2.2 martin */ 143 1.1.2.2 martin /* BATU(0x0c000000, BAT_BL_32M, BAT_Vs) */ 144 1.1.2.2 martin lis %r11, 0x0c00 145 1.1.2.2 martin ori %r11, %r11, BAT_BL_32M|BAT_Vs 146 1.1.2.2 martin /* BATL(0x0c000000, BAT_I|BAT_G, BAT_PP_RW) */ 147 1.1.2.2 martin lis %r12, 0x0c00 148 1.1.2.2 martin ori %r12, %r12, BAT_I|BAT_G|BAT_PP_RW 149 1.1.2.2 martin mtdbatu 1, %r11 150 1.1.2.2 martin mtdbatl 1, %r12 151 1.1.2.2 martin isync 152 1.1.2.2 martin 153 1.1.2.2 martin MMU_VIRTUALMODE() 154
Indexes created Mon Oct 27 08:10:08 GMT 2025