1 /* $NetBSD: ofwgencfg_machdep.c,v 1.4 2002/10/02 05:02:31 thorpej 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 "opt_ddb.h" 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/reboot.h> 46 #include <sys/proc.h> 47 #include <sys/kernel.h> 48 #include <sys/exec.h> 49 50 #include <uvm/uvm_extern.h> 51 52 #include <dev/cons.h> 53 54 #include <machine/db_machdep.h> 55 #include <ddb/db_sym.h> 56 #include <ddb/db_extern.h> 57 58 #include <machine/frame.h> 59 #include <machine/bootconfig.h> 60 #include <machine/cpu.h> 61 #include <machine/intr.h> 62 #include <arm/undefined.h> 63 64 #include "opt_ipkdb.h" 65 66 #include <dev/ofw/openfirm.h> 67 #include <machine/ofw.h> 68 69 /* 70 * Imported variables 71 */ 72 extern pv_addr_t undstack; 73 extern pv_addr_t abtstack; 74 extern pv_addr_t kernelstack; 75 extern u_int data_abort_handler_address; 76 extern u_int prefetch_abort_handler_address; 77 extern u_int undefined_handler_address; 78 79 /* 80 * Imported routines 81 */ 82 extern void parse_mi_bootargs __P((char *args)); 83 extern void data_abort_handler __P((trapframe_t *frame)); 84 extern void prefetch_abort_handler __P((trapframe_t *frame)); 85 extern void undefinedinstruction_bounce __P((trapframe_t *frame)); 86 int ofbus_match __P((struct device *, struct cfdata *, void *)); 87 void ofbus_attach __P((struct device *, struct device *, void *)); 88 89 /* Local routines */ 90 static void process_kernel_args __P((void)); 91 92 /* 93 * Exported variables 94 */ 95 BootConfig bootconfig; 96 char *boot_args = NULL; 97 char *boot_file = NULL; 98 #ifndef PMAP_STATIC_L1S 99 int max_processes = 64; /* Default number */ 100 #endif /* !PMAP_STATIC_L1S */ 101 102 int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */ 103 104 CFATTACH_DECL(ofbus_root, sizeof(struct device), 105 ofbus_match, ofbus_attach, NULL, NULL); 106 107 /**************************************************************/ 108 109 110 /* 111 * void boot(int howto, char *bootstr) 112 * 113 * Reboots the system, in event of: 114 * - reboot system call 115 * - panic 116 */ 117 118 void 119 cpu_reboot(howto, bootstr) 120 int howto; 121 char *bootstr; 122 { 123 /* Just call OFW common routine. */ 124 ofw_boot(howto, bootstr); 125 126 OF_boot("not reached -- stupid compiler"); 127 } 128 129 130 /* 131 * vaddr_t initarm(ofw_handle_t handle) 132 * 133 * Initial entry point on startup for a GENERIC OFW 134 * system. Called with MMU on, running in the OFW 135 * client environment. 136 * 137 * Major tasks are: 138 * - read the bootargs out of OFW; 139 * - take over memory management from OFW; 140 * - set-up the stacks 141 * - set-up the exception handlers 142 * 143 * Return the new stackptr (va) for the SVC frame. 144 * 145 */ 146 vaddr_t 147 initarm(ofw_handle) 148 ofw_handle_t ofw_handle; 149 { 150 set_cpufuncs(); 151 152 /* XXX - set this somewhere else? -JJK */ 153 boothowto = 0; 154 155 /* Init the OFW interface. */ 156 /* MUST do this before invoking any OFW client services! */ 157 ofw_init(ofw_handle); 158 159 /* Initialize the console (which will call into OFW). */ 160 /* This will allow us to see panic messages and other printf output. */ 161 consinit(); 162 163 /* Get boot info and process it. */ 164 ofw_getbootinfo(&boot_file, &boot_args); 165 process_kernel_args(); 166 167 /* Configure memory. */ 168 ofw_configmem(); 169 170 /* 171 * Set-up stacks. 172 * OFW has control of the interrupt frame. 173 * The kernel stack for SVC mode will be updated on return from 174 * this routine. All we need to do is prepare for abort-handling 175 * and undefined exceptions. 176 */ 177 set_stackptr(PSR_UND32_MODE, undstack.pv_va + NBPG); 178 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + NBPG); 179 180 /* Set-up exception handlers. 181 * Take control of selected vectors from OFW. 182 * We take: undefined, swi, pre-fetch abort, data abort, addrexc 183 * OFW retains: reset, irq, fiq 184 */ 185 arm32_vector_init(ARM_VECTORS_LOW, 186 ARM_VEC_ALL & ~(ARM_VEC_RESET|ARM_VEC_IRQ|ARM_VEC_FIQ)); 187 188 data_abort_handler_address = (u_int)data_abort_handler; 189 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 190 undefined_handler_address = 191 (u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */ 192 193 /* Initialise the undefined instruction handlers. */ 194 undefined_init(); 195 196 /* Set-up the IRQ system. */ 197 irq_init(); 198 199 #ifdef DDB 200 db_machine_init(); 201 #ifdef __ELF__ 202 ddb_init(0, NULL, NULL); /* XXX */ 203 #else 204 { 205 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 206 extern int end; 207 extern char *esym; 208 209 ddb_init(kernexec->a_syms, &end, esym); 210 } 211 #endif /* __ELF__ */ 212 213 if (boothowto & RB_KDB) 214 Debugger(); 215 #endif 216 217 /* Return the new stackbase. */ 218 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 219 } 220 221 222 /* 223 * Set various globals based on contents of boot_args 224 * 225 * Note that this routine must NOT trash boot_args, as 226 * it is scanned by later routines. 227 * 228 * There ought to be a routine in machdep.c that does 229 * the generic bits of this. -JJK 230 */ 231 static void 232 process_kernel_args(void) 233 { 234 /* Process all the generic ARM boot options */ 235 parse_mi_bootargs(boot_args); 236 237 /* Check for ofwgencfg-specific args here. */ 238 } 239 240 241 /* 242 * Walk the OFW device tree and configure found devices. 243 * 244 * Move this into common OFW module? -JJK 245 */ 246 void 247 ofrootfound(void) 248 { 249 int node; 250 struct ofbus_attach_args aa; 251 252 if (!(node = OF_peer(0))) 253 panic("No OFW root"); 254 aa.oba_busname = "ofw"; 255 aa.oba_phandle = node; 256 if (!config_rootfound("ofbus", &aa)) 257 panic("ofw root ofbus not configured"); 258 } 259