machdep.c revision 1.67
1 /* $NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp $ */ 2 3 /* 4 * Copyright 2001, 2002 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc. 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 for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * Copyright (C) 1995, 1996 Wolfgang Solfrank. 40 * Copyright (C) 1995, 1996 TooLs GmbH. 41 * All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. All advertising materials mentioning features or use of this software 52 * must display the following acknowledgement: 53 * This product includes software developed by TooLs GmbH. 54 * 4. The name of TooLs GmbH may not be used to endorse or promote products 55 * derived from this software without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR 58 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 59 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 60 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 61 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 62 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 63 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 64 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 65 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 66 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp $"); 71 72 #include "opt_ddb.h" 73 74 #include <sys/param.h> 75 #include <sys/bus.h> 76 #include <sys/device.h> 77 #include <sys/kernel.h> 78 #include <sys/module.h> 79 #include <sys/reboot.h> 80 #include <sys/systm.h> 81 82 #include <machine/walnut.h> 83 84 #include <powerpc/spr.h> 85 #include <powerpc/ibm4xx/spr.h> 86 87 #include <powerpc/ibm4xx/cpu.h> 88 #include <powerpc/ibm4xx/dcr4xx.h> 89 #include <powerpc/ibm4xx/ibm405gp.h> 90 #include <powerpc/ibm4xx/openbios.h> 91 #include <powerpc/ibm4xx/tlb.h> 92 93 #include <powerpc/ibm4xx/pci_machdep.h> 94 #include <dev/pci/pciconf.h> 95 #include <dev/pci/pcivar.h> 96 97 #define TLB_PG_SIZE (16*1024*1024) 98 99 void initppc(vaddr_t, vaddr_t, char *, void *); 100 101 void 102 initppc(vaddr_t startkernel, vaddr_t endkernel, char *args, void *info_block) 103 { 104 u_int memsize; 105 106 /* Disable all external interrupts */ 107 mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0); 108 109 /* Setup board from OpenBIOS */ 110 openbios_board_init(info_block); 111 memsize = openbios_board_memsize_get(); 112 113 /* Linear map kernel memory */ 114 for (vaddr_t va = 0; va < endkernel; va += TLB_PG_SIZE) { 115 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX); 116 } 117 118 /* Map console after physmem (see pmap_tlbmiss()) */ 119 ppc4xx_tlb_reserve(IBM405GP_UART0_BASE, roundup(memsize, TLB_PG_SIZE), 120 TLB_PG_SIZE, TLB_I | TLB_G); 121 122 mtspr(SPR_TCR, 0); /* disable all timers */ 123 124 ibm40x_memsize_init(memsize, startkernel); 125 ibm4xx_init(startkernel, endkernel, pic_ext_intr); 126 127 #ifdef DEBUG 128 openbios_board_print(); 129 #endif 130 131 #ifdef DDB 132 if (boothowto & RB_KDB) 133 Debugger(); 134 #endif 135 136 /* 137 * Look for the ibm4xx modules in the right place. 138 */ 139 module_machine = module_machine_ibm4xx; 140 } 141 142 /* 143 * Machine dependent startup code. 144 */ 145 146 void 147 cpu_startup(void) 148 { 149 150 ibm4xx_cpu_startup("Walnut PowerPC 405GP Evaluation Board"); 151 152 openbios_board_info_set(); 153 154 /* 155 * Now that we have VM, malloc()s are OK in bus_space. 156 */ 157 bus_space_mallocok(); 158 fake_mapiodev = 0; 159 } 160 161 int 162 ibm4xx_pci_bus_maxdevs(void *v, int busno) 163 { 164 165 /* 166 * Bus number is irrelevant. Configuration Mechanism 1 is in 167 * use, can have devices 0-32 (i.e. the `normal' range). 168 */ 169 return 5; 170 } 171 172 int 173 ibm4xx_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp) 174 { 175 int pin = pa->pa_intrpin; 176 int dev = pa->pa_device; 177 178 if (pin == 0) 179 /* No IRQ used. */ 180 goto bad; 181 182 if (pin > 4) { 183 printf("%s: bad interrupt pin %d\n", __func__, pin); 184 goto bad; 185 } 186 187 /* 188 * We need to map the interrupt pin to the interrupt bit in the UIC 189 * associated with it. This is highly machine-dependent. 190 */ 191 switch(dev) { 192 case 1: 193 case 2: 194 case 3: 195 case 4: 196 *ihp = 27 + dev; 197 break; 198 default: 199 printf("Hmm.. PCI device %d should not exist on this board\n", 200 dev); 201 goto bad; 202 } 203 return 0; 204 205 bad: 206 *ihp = -1; 207 return 1; 208 } 209 210 void 211 ibm4xx_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz, 212 int *iline) 213 { 214 215 if (bus == 0) { 216 switch(dev) { 217 case 1: 218 case 2: 219 case 3: 220 case 4: 221 *iline = 31 - dev; 222 } 223 } else 224 *iline = 20 + ((swiz + dev + 1) & 3); 225 } 226
Indexes created Fri Oct 03 02:09:57 GMT 2025