1 /* $NetBSD: machdep.c,v 1.31 2023/12/20 14:18:37 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Jachym Holecek 5 * All rights reserved. 6 * 7 * Written for DFC Design, s.r.o. 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 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Based on Walnut and Explora. 34 */ 35 36 #include <sys/cdefs.h> 37 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.31 2023/12/20 14:18:37 thorpej Exp $"); 38 39 #include "opt_compat_netbsd.h" 40 #include "opt_ddb.h" 41 #include "opt_virtex.h" 42 #include "opt_kgdb.h" 43 44 #include <sys/param.h> 45 #include <sys/boot_flag.h> 46 #include <sys/buf.h> 47 #include <sys/bus.h> 48 #include <sys/device.h> 49 #include <sys/exec.h> 50 #include <sys/mbuf.h> 51 #include <sys/module.h> 52 #include <sys/mount.h> 53 #include <sys/msgbuf.h> 54 #include <sys/kernel.h> 55 #include <sys/ksyms.h> 56 #include <sys/proc.h> 57 #include <sys/reboot.h> 58 #include <sys/syscallargs.h> 59 #include <sys/syslog.h> 60 #include <sys/systm.h> 61 62 #include <uvm/uvm_extern.h> 63 64 #include <dev/cons.h> 65 66 #include <machine/powerpc.h> 67 68 #include <powerpc/trap.h> 69 #include <powerpc/pcb.h> 70 71 #include <powerpc/spr.h> 72 #include <powerpc/ibm4xx/spr.h> 73 74 #include <powerpc/ibm4xx/cpu.h> 75 76 #include <evbppc/virtex/dcr.h> 77 #include <evbppc/virtex/virtex.h> 78 79 #include "ksyms.h" 80 81 #if defined(DDB) 82 #include <powerpc/db_machdep.h> 83 #include <ddb/db_extern.h> 84 #endif 85 86 #if defined(KGDB) 87 #include <sys/kgdb.h> 88 #endif 89 90 void initppc(vaddr_t, vaddr_t); 91 92 /* BSS segment start & end. */ 93 extern char edata[], end[]; 94 95 /* One region holds all memory, the other is terminator expected by 405 pmap. */ 96 #define MEMREGIONS 2 97 struct mem_region physmemr[MEMREGIONS]; 98 struct mem_region availmemr[MEMREGIONS]; 99 100 /* Maximum TLB page size. */ 101 #define TLB_PG_SIZE (16*1024*1024) 102 103 void 104 initppc(vaddr_t startkernel, vaddr_t endkernel) 105 { 106 paddr_t addr, memsize; 107 108 /* Initialize cache info for memcpy, memset, etc. */ 109 cpu_probe_cache(); 110 111 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */ 112 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */ 113 114 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET; 115 116 physmemr[0].start = 0; 117 physmemr[0].size = memsize; 118 119 availmemr[0].start = startkernel; 120 availmemr[0].size = memsize - availmemr[0].start; 121 122 /* Map kernel memory linearly. */ 123 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE) 124 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX); 125 126 /* Give design-specific code a hint for reserved mappings. */ 127 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE, 128 physmemr, availmemr); 129 130 ibm4xx_init(startkernel, endkernel, pic_ext_intr); 131 132 #ifdef DDB 133 if (boothowto & RB_KDB) 134 Debugger(); 135 #endif 136 137 #ifdef KGDB 138 /* 139 * Now trap to KGDB 140 */ 141 kgdb_connect(1); 142 #endif /* KGDB */ 143 } 144 145 /* 146 * Machine dependent startup code. 147 */ 148 149 void 150 cpu_startup(void) 151 { 152 /* For use by propdb. */ 153 static u_int memsize = PHYSMEM * 1024 * 1024; 154 static u_int cpuspeed = CPUFREQ * 1000 * 1000; 155 prop_number_t pn; 156 157 vaddr_t minaddr, maxaddr; 158 char pbuf[9]; 159 160 curcpu()->ci_khz = cpuspeed / 1000; 161 162 /* Initialize error message buffer. */ 163 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 164 165 printf("%s%s", copyright, version); 166 167 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 168 printf("total memory = %s\n", pbuf); 169 170 minaddr = 0; 171 /* 172 * Allocate a submap for physio 173 */ 174 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 175 VM_PHYS_SIZE, 0, false, NULL); 176 177 /* 178 * No need to allocate an mbuf cluster submap. Mbuf clusters 179 * are allocated via the pool allocator, and we use direct-mapped 180 * pool pages. 181 */ 182 183 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 184 printf("avail memory = %s\n", pbuf); 185 186 /* 187 * Set up the board properties database. 188 */ 189 board_info_init(); 190 191 pn = prop_number_create_integer(memsize); 192 KASSERT(pn != NULL); 193 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 194 panic("setting mem-size"); 195 prop_object_release(pn); 196 197 pn = prop_number_create_integer(cpuspeed); 198 KASSERT(pn != NULL); 199 if (prop_dictionary_set(board_properties, "processor-frequency", 200 pn) == false) 201 panic("setting processor-frequency"); 202 prop_object_release(pn); 203 204 /* 205 * Now that we have VM, malloc()s are OK in bus_space. 206 */ 207 bus_space_mallocok(); 208 fake_mapiodev = 0; 209 } 210 211 /* Hook used by 405 pmap module. */ 212 void 213 mem_regions(struct mem_region **mem, struct mem_region **avail) 214 { 215 *mem = physmemr; 216 *avail = availmemr; 217 } 218
Indexes created Sat Sep 20 22:09:52 GMT 2025