ofwgencfg_machdep.c revision 1.9
1 /* $NetBSD: ofwgencfg_machdep.c,v 1.9 2006/10/24 21:03:13 bjh21 Exp $ */ 2 3 /* 4 * Copyright 1997 5 * Digital Equipment Corporation. All rights reserved. 6 * 7 * This software is furnished under license and may be used and 8 * copied only in accordance with the following terms and conditions. 9 * Subject to these conditions, you may download, copy, install, 10 * use, modify and distribute this software in source and/or binary 11 * form. No title or ownership is transferred hereby. 12 * 13 * 1) Any source code used, modified or distributed must reproduce 14 * and retain this copyright notice and list of conditions as 15 * they appear in the source file. 16 * 17 * 2) No right is granted to use any trade name, trademark, or logo of 18 * Digital Equipment Corporation. Neither the "Digital Equipment 19 * Corporation" name nor any trademark or logo of Digital Equipment 20 * Corporation may be used to endorse or promote products derived 21 * from this software without the prior written permission of 22 * Digital Equipment Corporation. 23 * 24 * 3) This software is provided "AS-IS" and any express or implied 25 * warranties, including but not limited to, any implied warranties 26 * of merchantability, fitness for a particular purpose, or 27 * non-infringement are disclaimed. In no event shall DIGITAL be 28 * liable for any damages whatsoever, and in particular, DIGITAL 29 * shall not be liable for special, indirect, consequential, or 30 * incidental damages or damages for lost profits, loss of 31 * revenue or loss of use, whether such damages arise in contract, 32 * negligence, tort, under statute, in equity, at law or otherwise, 33 * even if advised of the possibility of such damage. 34 */ 35 36 /* 37 * Kernel setup for the OFW Generic Configuration 38 */ 39 40 #include <sys/cdefs.h> 41 __KERNEL_RCSID(0, "$NetBSD: ofwgencfg_machdep.c,v 1.9 2006/10/24 21:03:13 bjh21 Exp $"); 42 43 #include "opt_ddb.h" 44 45 #include <sys/types.h> 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/reboot.h> 49 #include <sys/proc.h> 50 #include <sys/kernel.h> 51 #include <sys/exec.h> 52 #include <sys/ksyms.h> 53 54 #include <uvm/uvm_extern.h> 55 56 #include <dev/cons.h> 57 58 #include <machine/db_machdep.h> 59 #include <ddb/db_sym.h> 60 #include <ddb/db_extern.h> 61 62 #include <machine/frame.h> 63 #include <machine/bootconfig.h> 64 #include <machine/cpu.h> 65 #include <machine/intr.h> 66 #include <arm/arm32/machdep.h> 67 #include <arm/undefined.h> 68 69 #include "opt_ipkdb.h" 70 71 #include <dev/ofw/openfirm.h> 72 #include <machine/ofw.h> 73 74 #include "ksyms.h" 75 76 /* 77 * Imported variables 78 */ 79 extern pv_addr_t undstack; 80 extern pv_addr_t abtstack; 81 extern pv_addr_t kernelstack; 82 extern u_int data_abort_handler_address; 83 extern u_int prefetch_abort_handler_address; 84 extern u_int undefined_handler_address; 85 86 /* 87 * Imported routines 88 */ 89 extern void data_abort_handler __P((trapframe_t *frame)); 90 extern void prefetch_abort_handler __P((trapframe_t *frame)); 91 extern void undefinedinstruction_bounce __P((trapframe_t *frame)); 92 int ofbus_match __P((struct device *, struct cfdata *, void *)); 93 void ofbus_attach __P((struct device *, struct device *, void *)); 94 95 /* Local routines */ 96 static void process_kernel_args __P((void)); 97 98 /* 99 * Exported variables 100 */ 101 BootConfig bootconfig; 102 char *boot_args = NULL; 103 char *boot_file = NULL; 104 #ifndef PMAP_STATIC_L1S 105 int max_processes = 64; /* Default number */ 106 #endif /* !PMAP_STATIC_L1S */ 107 108 int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */ 109 110 CFATTACH_DECL(ofbus_root, sizeof(struct device), 111 ofbus_match, ofbus_attach, NULL, NULL); 112 113 /**************************************************************/ 114 115 116 /* 117 * void boot(int howto, char *bootstr) 118 * 119 * Reboots the system, in event of: 120 * - reboot system call 121 * - panic 122 */ 123 124 void 125 cpu_reboot(howto, bootstr) 126 int howto; 127 char *bootstr; 128 { 129 /* Just call OFW common routine. */ 130 ofw_boot(howto, bootstr); 131 132 OF_boot("not reached -- stupid compiler"); 133 } 134 135 136 /* 137 * vaddr_t initarm(ofw_handle_t handle) 138 * 139 * Initial entry point on startup for a GENERIC OFW 140 * system. Called with MMU on, running in the OFW 141 * client environment. 142 * 143 * Major tasks are: 144 * - read the bootargs out of OFW; 145 * - take over memory management from OFW; 146 * - set-up the stacks 147 * - set-up the exception handlers 148 * 149 * Return the new stackptr (va) for the SVC frame. 150 * 151 */ 152 vaddr_t 153 initarm(ofw_handle) 154 ofw_handle_t ofw_handle; 155 { 156 set_cpufuncs(); 157 158 /* XXX - set this somewhere else? -JJK */ 159 boothowto = 0; 160 161 /* Init the OFW interface. */ 162 /* MUST do this before invoking any OFW client services! */ 163 ofw_init(ofw_handle); 164 165 /* Initialize the console (which will call into OFW). */ 166 /* This will allow us to see panic messages and other printf output. */ 167 consinit(); 168 169 /* Get boot info and process it. */ 170 ofw_getbootinfo(&boot_file, &boot_args); 171 process_kernel_args(); 172 173 /* Configure memory. */ 174 ofw_configmem(); 175 176 /* 177 * Set-up stacks. 178 * OFW has control of the interrupt frame. 179 * The kernel stack for SVC mode will be updated on return from 180 * this routine. All we need to do is prepare for abort-handling 181 * and undefined exceptions. 182 */ 183 set_stackptr(PSR_UND32_MODE, undstack.pv_va + PAGE_SIZE); 184 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + PAGE_SIZE); 185 186 /* Set-up exception handlers. 187 * Take control of selected vectors from OFW. 188 * We take: undefined, swi, pre-fetch abort, data abort, addrexc 189 * OFW retains: reset, irq, fiq 190 */ 191 arm32_vector_init(ARM_VECTORS_LOW, 192 ARM_VEC_ALL & ~(ARM_VEC_RESET|ARM_VEC_IRQ|ARM_VEC_FIQ)); 193 194 data_abort_handler_address = (u_int)data_abort_handler; 195 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 196 undefined_handler_address = 197 (u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */ 198 199 /* Initialise the undefined instruction handlers. */ 200 undefined_init(); 201 202 /* Set-up the IRQ system. */ 203 irq_init(); 204 205 #if NKSYMS || defined(DDB) || defined(LKM) 206 #ifdef __ELF__ 207 ksyms_init(0, NULL, NULL); /* XXX */ 208 #else 209 { 210 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 211 extern int end; 212 extern char *esym; 213 214 ksyms_init(kernexec->a_syms, &end, esym); 215 } 216 #endif /* __ELF__ */ 217 #endif 218 219 #ifdef DDB 220 db_machine_init(); 221 if (boothowto & RB_KDB) 222 Debugger(); 223 #endif 224 225 /* Return the new stackbase. */ 226 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 227 } 228 229 230 /* 231 * Set various globals based on contents of boot_args 232 * 233 * Note that this routine must NOT trash boot_args, as 234 * it is scanned by later routines. 235 * 236 * There ought to be a routine in machdep.c that does 237 * the generic bits of this. -JJK 238 */ 239 static void 240 process_kernel_args(void) 241 { 242 /* Process all the generic ARM boot options */ 243 parse_mi_bootargs(boot_args); 244 245 /* Check for ofwgencfg-specific args here. */ 246 } 247 248 249 /* 250 * Walk the OFW device tree and configure found devices. 251 * 252 * Move this into common OFW module? -JJK 253 */ 254 void 255 ofrootfound(void) 256 { 257 int node; 258 struct ofbus_attach_args aa; 259 260 if (!(node = OF_peer(0))) 261 panic("No OFW root"); 262 aa.oba_busname = "ofw"; 263 aa.oba_phandle = node; 264 if (!config_rootfound("ofbus", &aa)) 265 panic("ofw root ofbus not configured"); 266 } 267
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