ofwgencfg_machdep.c revision 1.11
1 /* $NetBSD: ofwgencfg_machdep.c,v 1.11 2007/03/08 20:48:39 matt 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 1.11 2007/03/08 20:48:39 matt 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 <machine/irqhandler.h> 67 #include <arm/arm32/machdep.h> 68 #include <arm/undefined.h> 69 70 #include "opt_ipkdb.h" 71 72 #include <dev/ofw/openfirm.h> 73 #include <machine/ofw.h> 74 75 #include "ksyms.h" 76 77 /* 78 * Imported variables 79 */ 80 extern pv_addr_t undstack; 81 extern pv_addr_t abtstack; 82 extern pv_addr_t kernelstack; 83 extern u_int data_abort_handler_address; 84 extern u_int prefetch_abort_handler_address; 85 extern u_int undefined_handler_address; 86 87 /* 88 * Imported routines 89 */ 90 extern void data_abort_handler __P((trapframe_t *frame)); 91 extern void prefetch_abort_handler __P((trapframe_t *frame)); 92 extern void undefinedinstruction_bounce __P((trapframe_t *frame)); 93 int ofbus_match __P((struct device *, struct cfdata *, void *)); 94 void ofbus_attach __P((struct device *, struct device *, void *)); 95 96 /* Local routines */ 97 static void process_kernel_args __P((void)); 98 99 /* 100 * Exported variables 101 */ 102 BootConfig bootconfig; 103 char *boot_args = NULL; 104 char *boot_file = NULL; 105 #ifndef PMAP_STATIC_L1S 106 int max_processes = 64; /* Default number */ 107 #endif /* !PMAP_STATIC_L1S */ 108 109 int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */ 110 111 CFATTACH_DECL(ofbus_root, sizeof(struct device), 112 ofbus_match, ofbus_attach, NULL, NULL); 113 114 /**************************************************************/ 115 116 117 /* 118 * void boot(int howto, char *bootstr) 119 * 120 * Reboots the system, in event of: 121 * - reboot system call 122 * - panic 123 */ 124 125 void 126 cpu_reboot(howto, bootstr) 127 int howto; 128 char *bootstr; 129 { 130 /* Just call OFW common routine. */ 131 ofw_boot(howto, bootstr); 132 133 OF_boot("not reached -- stupid compiler"); 134 } 135 136 137 /* 138 * u_int initarm(ofw_handle_t handle) 139 * 140 * Initial entry point on startup for a GENERIC OFW 141 * system. Called with MMU on, running in the OFW 142 * client environment. 143 * 144 * Major tasks are: 145 * - read the bootargs out of OFW; 146 * - take over memory management from OFW; 147 * - set-up the stacks 148 * - set-up the exception handlers 149 * 150 * Return the new stackptr (va) for the SVC frame. 151 * 152 */ 153 u_int 154 initarm(void *cookie) 155 { 156 ofw_handle_t ofw_handle = cookie; 157 158 set_cpufuncs(); 159 160 /* XXX - set this somewhere else? -JJK */ 161 boothowto = 0; 162 163 /* Init the OFW interface. */ 164 /* MUST do this before invoking any OFW client services! */ 165 ofw_init(ofw_handle); 166 167 /* Initialize the console (which will call into OFW). */ 168 /* This will allow us to see panic messages and other printf output. */ 169 consinit(); 170 171 /* Get boot info and process it. */ 172 ofw_getbootinfo(&boot_file, &boot_args); 173 process_kernel_args(); 174 175 /* Configure memory. */ 176 ofw_configmem(); 177 178 /* 179 * Set-up stacks. 180 * OFW has control of the interrupt frame. 181 * The kernel stack for SVC mode will be updated on return from 182 * this routine. All we need to do is prepare for abort-handling 183 * and undefined exceptions. 184 */ 185 set_stackptr(PSR_UND32_MODE, undstack.pv_va + PAGE_SIZE); 186 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + PAGE_SIZE); 187 188 /* Set-up exception handlers. 189 * Take control of selected vectors from OFW. 190 * We take: undefined, swi, pre-fetch abort, data abort, addrexc 191 * OFW retains: reset, irq, fiq 192 */ 193 arm32_vector_init(ARM_VECTORS_LOW, 194 ARM_VEC_ALL & ~(ARM_VEC_RESET|ARM_VEC_IRQ|ARM_VEC_FIQ)); 195 196 data_abort_handler_address = (u_int)data_abort_handler; 197 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 198 undefined_handler_address = 199 (u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */ 200 201 /* Initialise the undefined instruction handlers. */ 202 undefined_init(); 203 204 /* Set-up the IRQ system. */ 205 irq_init(); 206 207 #if NKSYMS || defined(DDB) || defined(LKM) 208 #ifdef __ELF__ 209 ksyms_init(0, NULL, NULL); /* XXX */ 210 #else 211 { 212 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 213 extern int end; 214 extern char *esym; 215 216 ksyms_init(kernexec->a_syms, &end, esym); 217 } 218 #endif /* __ELF__ */ 219 #endif 220 221 #ifdef DDB 222 db_machine_init(); 223 if (boothowto & RB_KDB) 224 Debugger(); 225 #endif 226 227 /* Return the new stackbase. */ 228 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 229 } 230 231 232 /* 233 * Set various globals based on contents of boot_args 234 * 235 * Note that this routine must NOT trash boot_args, as 236 * it is scanned by later routines. 237 * 238 * There ought to be a routine in machdep.c that does 239 * the generic bits of this. -JJK 240 */ 241 static void 242 process_kernel_args(void) 243 { 244 /* Process all the generic ARM boot options */ 245 parse_mi_bootargs(boot_args); 246 247 /* Check for ofwgencfg-specific args here. */ 248 } 249 250 251 /* 252 * Walk the OFW device tree and configure found devices. 253 * 254 * Move this into common OFW module? -JJK 255 */ 256 void 257 ofrootfound(void) 258 { 259 int node; 260 struct ofbus_attach_args aa; 261 262 if (!(node = OF_peer(0))) 263 panic("No OFW root"); 264 aa.oba_busname = "ofw"; 265 aa.oba_phandle = node; 266 if (!config_rootfound("ofbus", &aa)) 267 panic("ofw root ofbus not configured"); 268 } 269
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