1 /* $NetBSD: prep_machdep.c,v 1.13 2021/02/27 01:31:23 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Tim Rightnour 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This is a set of general routines that most PReP-similar machines have 34 * in common. Machines that use these routines do not have to be fully 35 * PReP compliant, the only requirement is that they use a PReP memory map. 36 * IE, io at 0x80000000 and mem at 0xc0000000. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: prep_machdep.c,v 1.13 2021/02/27 01:31:23 thorpej Exp $"); 41 42 #include "ksyms.h" 43 44 #ifdef _KERNEL_OPT 45 #include "opt_ddb.h" 46 #include "opt_modular.h" 47 #endif 48 49 #include <sys/param.h> 50 #include <sys/extent.h> 51 #include <sys/kernel.h> 52 #include <sys/reboot.h> 53 #include <sys/ksyms.h> 54 55 #include <uvm/uvm_extern.h> 56 #include <machine/powerpc.h> 57 #include <sys/bus.h> 58 #include <machine/pmap.h> 59 #include <powerpc/oea/bat.h> 60 61 #ifdef DDB 62 #include <machine/db_machdep.h> 63 #include <ddb/db_extern.h> 64 #endif 65 66 #if NKSYMS || defined(DDB) || defined(MODULAR) 67 extern void *endsym, *startsym; 68 #endif 69 extern struct mem_region physmemr[2], availmemr[2]; 70 71 struct powerpc_bus_space prep_io_space_tag = { 72 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE, 73 .pbs_offset = PREP_BUS_SPACE_IO, 74 .pbs_base = 0x00000000, 75 .pbs_limit = PREP_PHYS_SIZE_IO, 76 }; 77 78 struct powerpc_bus_space genppc_isa_io_space_tag = { 79 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE, 80 .pbs_offset = PREP_BUS_SPACE_IO, 81 .pbs_base = 0x00000000, 82 .pbs_limit = PREP_ISA_SIZE_IO, 83 }; 84 85 struct powerpc_bus_space prep_mem_space_tag = { 86 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE, 87 .pbs_offset = PREP_BUS_SPACE_MEM, 88 .pbs_base = 0x00000000, 89 .pbs_limit = PREP_PHYS_SIZE_MEM, 90 }; 91 92 struct powerpc_bus_space genppc_isa_mem_space_tag = { 93 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE, 94 .pbs_offset = PREP_BUS_SPACE_MEM, 95 .pbs_base = 0x00000000, 96 .pbs_limit = PREP_ISA_SIZE_MEM, 97 }; 98 99 static char ex_storage[2][EXTENT_FIXED_STORAGE_SIZE(8)] 100 __attribute__((aligned(8))); 101 102 void 103 prep_bus_space_init(void) 104 { 105 int error; 106 107 error = bus_space_init(&prep_io_space_tag, "ioport", 108 ex_storage[0], sizeof(ex_storage[0])); 109 if (error) 110 panic("prep_bus_space_init: can't init io tag"); 111 112 error = extent_alloc_region(prep_io_space_tag.pbs_extent, 113 PREP_PHYS_RESVD_START_IO, PREP_PHYS_RESVD_SIZE_IO, EX_NOWAIT); 114 if (error) 115 panic("prep_bus_space_init: can't block out reserved I/O" 116 " space 0x10000-0x7fffff: error=%d", error); 117 118 error = bus_space_init(&prep_mem_space_tag, "iomem", 119 ex_storage[1], sizeof(ex_storage[1])); 120 if (error) 121 panic("prep_bus_space_init: can't init mem tag"); 122 123 genppc_isa_io_space_tag.pbs_extent = prep_io_space_tag.pbs_extent; 124 error = bus_space_init(&genppc_isa_io_space_tag, "isa-ioport", NULL, 0); if (error) 125 panic("prep_bus_space_init: can't init isa io tag"); 126 127 genppc_isa_mem_space_tag.pbs_extent = prep_mem_space_tag.pbs_extent; 128 error = bus_space_init(&genppc_isa_mem_space_tag, "isa-iomem", NULL, 0); 129 if (error) 130 panic("prep_bus_space_init: can't init isa mem tag"); 131 } 132 133 /* 134 * just a few calls used in initppc() all in one place so everything gets 135 * done the same across the ports 136 */ 137 138 void 139 prep_initppc(u_long startkernel, u_long endkernel, u_int args, paddr_t pa, ...) 140 { 141 va_list ap; 142 143 /* 144 * Set up fixed BAT registers. We map the PReP IO and MEM 145 * space, plus any additional regions the platform wants. 146 */ 147 oea_batinit( 148 PREP_BUS_SPACE_MEM, BAT_BL_256M, 149 PREP_BUS_SPACE_IO, BAT_BL_256M, 150 0); 151 152 va_start(ap, pa); 153 while (pa != 0) { 154 register_t len = va_arg(ap, register_t); 155 oea_iobat_add(pa, len); 156 pa = va_arg(ap, paddr_t); 157 } 158 va_end(ap); 159 160 /* Install vectors and interrupt handler. */ 161 oea_init(NULL); 162 163 /* Initialize bus_space. */ 164 prep_bus_space_init(); 165 166 /* Initialize the console asap. */ 167 consinit(); 168 169 /* Set the page size */ 170 uvm_md_init(); 171 172 /* Initialize pmap module */ 173 pmap_bootstrap(startkernel, endkernel); 174 175 #if NKSYMS || defined(DDB) || defined(MODULAR) 176 ksyms_addsyms_elf((int)((u_long)endsym - (u_long)startsym), startsym, endsym); 177 #endif 178 179 #ifdef DDB 180 boothowto = args; 181 if (boothowto & RB_KDB) 182 Debugger(); 183 #endif 184 } 185 186 void 187 mem_regions(struct mem_region **mem, struct mem_region **avail) 188 { 189 190 *mem = physmemr; 191 *avail = availmemr; 192 } 193
Indexes created Fri Sep 26 20:09:58 GMT 2025