machdep.c revision 1.30
1 /* $NetBSD: machdep.c,v 1.30 2021/08/03 09:25:44 rin 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 1.30 2021/08/03 09:25:44 rin 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/malloc.h> 51 #include <sys/mbuf.h> 52 #include <sys/module.h> 53 #include <sys/mount.h> 54 #include <sys/msgbuf.h> 55 #include <sys/kernel.h> 56 #include <sys/ksyms.h> 57 #include <sys/proc.h> 58 #include <sys/reboot.h> 59 #include <sys/syscallargs.h> 60 #include <sys/syslog.h> 61 #include <sys/systm.h> 62 63 #include <uvm/uvm_extern.h> 64 65 #include <dev/cons.h> 66 67 #include <machine/powerpc.h> 68 69 #include <powerpc/trap.h> 70 #include <powerpc/pcb.h> 71 72 #include <powerpc/spr.h> 73 #include <powerpc/ibm4xx/spr.h> 74 75 #include <powerpc/ibm4xx/cpu.h> 76 77 #include <evbppc/virtex/dcr.h> 78 #include <evbppc/virtex/virtex.h> 79 80 #include "ksyms.h" 81 82 #if defined(DDB) 83 #include <powerpc/db_machdep.h> 84 #include <ddb/db_extern.h> 85 #endif 86 87 #if defined(KGDB) 88 #include <sys/kgdb.h> 89 #endif 90 91 void initppc(vaddr_t, vaddr_t); 92 93 /* BSS segment start & end. */ 94 extern char edata[], end[]; 95 96 /* One region holds all memory, the other is terminator expected by 405 pmap. */ 97 #define MEMREGIONS 2 98 struct mem_region physmemr[MEMREGIONS]; 99 struct mem_region availmemr[MEMREGIONS]; 100 101 /* Maximum TLB page size. */ 102 #define TLB_PG_SIZE (16*1024*1024) 103 104 void 105 initppc(vaddr_t startkernel, vaddr_t endkernel) 106 { 107 paddr_t addr, memsize; 108 109 /* Initialize cache info for memcpy, memset, etc. */ 110 cpu_probe_cache(); 111 112 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */ 113 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */ 114 115 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET; 116 117 physmemr[0].start = 0; 118 physmemr[0].size = memsize; 119 120 availmemr[0].start = startkernel; 121 availmemr[0].size = memsize - availmemr[0].start; 122 123 /* Map kernel memory linearly. */ 124 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE) 125 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX); 126 127 /* Give design-specific code a hint for reserved mappings. */ 128 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE, 129 physmemr, availmemr); 130 131 ibm4xx_init(startkernel, endkernel, pic_ext_intr); 132 133 #ifdef DDB 134 if (boothowto & RB_KDB) 135 Debugger(); 136 #endif 137 138 #ifdef KGDB 139 /* 140 * Now trap to KGDB 141 */ 142 kgdb_connect(1); 143 #endif /* KGDB */ 144 } 145 146 /* 147 * Machine dependent startup code. 148 */ 149 150 void 151 cpu_startup(void) 152 { 153 /* For use by propdb. */ 154 static u_int memsize = PHYSMEM * 1024 * 1024; 155 static u_int cpuspeed = CPUFREQ * 1000 * 1000; 156 prop_number_t pn; 157 158 vaddr_t minaddr, maxaddr; 159 char pbuf[9]; 160 161 curcpu()->ci_khz = cpuspeed / 1000; 162 163 /* Initialize error message buffer. */ 164 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE)); 165 166 printf("%s%s", copyright, version); 167 168 format_bytes(pbuf, sizeof(pbuf), ctob(physmem)); 169 printf("total memory = %s\n", pbuf); 170 171 minaddr = 0; 172 /* 173 * Allocate a submap for physio 174 */ 175 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 176 VM_PHYS_SIZE, 0, false, NULL); 177 178 /* 179 * No need to allocate an mbuf cluster submap. Mbuf clusters 180 * are allocated via the pool allocator, and we use direct-mapped 181 * pool pages. 182 */ 183 184 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false))); 185 printf("avail memory = %s\n", pbuf); 186 187 /* 188 * Set up the board properties database. 189 */ 190 board_info_init(); 191 192 pn = prop_number_create_integer(memsize); 193 KASSERT(pn != NULL); 194 if (prop_dictionary_set(board_properties, "mem-size", pn) == false) 195 panic("setting mem-size"); 196 prop_object_release(pn); 197 198 pn = prop_number_create_integer(cpuspeed); 199 KASSERT(pn != NULL); 200 if (prop_dictionary_set(board_properties, "processor-frequency", 201 pn) == false) 202 panic("setting processor-frequency"); 203 prop_object_release(pn); 204 205 /* 206 * Now that we have VM, malloc()s are OK in bus_space. 207 */ 208 bus_space_mallocok(); 209 fake_mapiodev = 0; 210 } 211 212 /* Hook used by 405 pmap module. */ 213 void 214 mem_regions(struct mem_region **mem, struct mem_region **avail) 215 { 216 *mem = physmemr; 217 *avail = availmemr; 218 } 219
Indexes created Sun Oct 26 21:10:03 GMT 2025