ofwgencfg_machdep.c revision 1.1.2.4
1 1.1.2.4 nathanw /* $NetBSD: ofwgencfg_machdep.c,v 1.1.2.4 2002/10/18 02:35:39 nathanw Exp $ */ 2 1.1.2.2 nathanw 3 1.1.2.2 nathanw /* 4 1.1.2.2 nathanw * Copyright 1997 5 1.1.2.2 nathanw * Digital Equipment Corporation. All rights reserved. 6 1.1.2.2 nathanw * 7 1.1.2.2 nathanw * This software is furnished under license and may be used and 8 1.1.2.2 nathanw * copied only in accordance with the following terms and conditions. 9 1.1.2.2 nathanw * Subject to these conditions, you may download, copy, install, 10 1.1.2.2 nathanw * use, modify and distribute this software in source and/or binary 11 1.1.2.2 nathanw * form. No title or ownership is transferred hereby. 12 1.1.2.2 nathanw * 13 1.1.2.2 nathanw * 1) Any source code used, modified or distributed must reproduce 14 1.1.2.2 nathanw * and retain this copyright notice and list of conditions as 15 1.1.2.2 nathanw * they appear in the source file. 16 1.1.2.2 nathanw * 17 1.1.2.2 nathanw * 2) No right is granted to use any trade name, trademark, or logo of 18 1.1.2.2 nathanw * Digital Equipment Corporation. Neither the "Digital Equipment 19 1.1.2.2 nathanw * Corporation" name nor any trademark or logo of Digital Equipment 20 1.1.2.2 nathanw * Corporation may be used to endorse or promote products derived 21 1.1.2.2 nathanw * from this software without the prior written permission of 22 1.1.2.2 nathanw * Digital Equipment Corporation. 23 1.1.2.2 nathanw * 24 1.1.2.2 nathanw * 3) This software is provided "AS-IS" and any express or implied 25 1.1.2.2 nathanw * warranties, including but not limited to, any implied warranties 26 1.1.2.2 nathanw * of merchantability, fitness for a particular purpose, or 27 1.1.2.2 nathanw * non-infringement are disclaimed. In no event shall DIGITAL be 28 1.1.2.2 nathanw * liable for any damages whatsoever, and in particular, DIGITAL 29 1.1.2.2 nathanw * shall not be liable for special, indirect, consequential, or 30 1.1.2.2 nathanw * incidental damages or damages for lost profits, loss of 31 1.1.2.2 nathanw * revenue or loss of use, whether such damages arise in contract, 32 1.1.2.2 nathanw * negligence, tort, under statute, in equity, at law or otherwise, 33 1.1.2.2 nathanw * even if advised of the possibility of such damage. 34 1.1.2.2 nathanw */ 35 1.1.2.2 nathanw 36 1.1.2.2 nathanw /* 37 1.1.2.2 nathanw * Kernel setup for the OFW Generic Configuration 38 1.1.2.2 nathanw */ 39 1.1.2.2 nathanw 40 1.1.2.2 nathanw #include "opt_ddb.h" 41 1.1.2.2 nathanw 42 1.1.2.2 nathanw #include <sys/types.h> 43 1.1.2.2 nathanw #include <sys/param.h> 44 1.1.2.2 nathanw #include <sys/systm.h> 45 1.1.2.2 nathanw #include <sys/reboot.h> 46 1.1.2.2 nathanw #include <sys/proc.h> 47 1.1.2.2 nathanw #include <sys/kernel.h> 48 1.1.2.2 nathanw #include <sys/exec.h> 49 1.1.2.2 nathanw 50 1.1.2.2 nathanw #include <uvm/uvm_extern.h> 51 1.1.2.2 nathanw 52 1.1.2.2 nathanw #include <dev/cons.h> 53 1.1.2.2 nathanw 54 1.1.2.2 nathanw #include <machine/db_machdep.h> 55 1.1.2.2 nathanw #include <ddb/db_sym.h> 56 1.1.2.2 nathanw #include <ddb/db_extern.h> 57 1.1.2.2 nathanw 58 1.1.2.2 nathanw #include <machine/frame.h> 59 1.1.2.2 nathanw #include <machine/bootconfig.h> 60 1.1.2.2 nathanw #include <machine/cpu.h> 61 1.1.2.2 nathanw #include <machine/intr.h> 62 1.1.2.2 nathanw #include <arm/undefined.h> 63 1.1.2.2 nathanw 64 1.1.2.2 nathanw #include "opt_ipkdb.h" 65 1.1.2.2 nathanw 66 1.1.2.2 nathanw #include <dev/ofw/openfirm.h> 67 1.1.2.2 nathanw #include <machine/ofw.h> 68 1.1.2.2 nathanw 69 1.1.2.2 nathanw /* 70 1.1.2.2 nathanw * Imported variables 71 1.1.2.2 nathanw */ 72 1.1.2.2 nathanw extern pv_addr_t undstack; 73 1.1.2.2 nathanw extern pv_addr_t abtstack; 74 1.1.2.2 nathanw extern pv_addr_t kernelstack; 75 1.1.2.2 nathanw extern u_int data_abort_handler_address; 76 1.1.2.2 nathanw extern u_int prefetch_abort_handler_address; 77 1.1.2.2 nathanw extern u_int undefined_handler_address; 78 1.1.2.2 nathanw 79 1.1.2.2 nathanw /* 80 1.1.2.2 nathanw * Imported routines 81 1.1.2.2 nathanw */ 82 1.1.2.2 nathanw extern void parse_mi_bootargs __P((char *args)); 83 1.1.2.2 nathanw extern void data_abort_handler __P((trapframe_t *frame)); 84 1.1.2.2 nathanw extern void prefetch_abort_handler __P((trapframe_t *frame)); 85 1.1.2.2 nathanw extern void undefinedinstruction_bounce __P((trapframe_t *frame)); 86 1.1.2.2 nathanw int ofbus_match __P((struct device *, struct cfdata *, void *)); 87 1.1.2.2 nathanw void ofbus_attach __P((struct device *, struct device *, void *)); 88 1.1.2.2 nathanw 89 1.1.2.2 nathanw /* Local routines */ 90 1.1.2.2 nathanw static void process_kernel_args __P((void)); 91 1.1.2.2 nathanw 92 1.1.2.2 nathanw /* 93 1.1.2.2 nathanw * Exported variables 94 1.1.2.2 nathanw */ 95 1.1.2.2 nathanw BootConfig bootconfig; 96 1.1.2.2 nathanw char *boot_args = NULL; 97 1.1.2.2 nathanw char *boot_file = NULL; 98 1.1.2.2 nathanw #ifndef PMAP_STATIC_L1S 99 1.1.2.2 nathanw int max_processes = 64; /* Default number */ 100 1.1.2.2 nathanw #endif /* !PMAP_STATIC_L1S */ 101 1.1.2.2 nathanw 102 1.1.2.2 nathanw int ofw_handleticks = 0; /* set to TRUE by cpu_initclocks */ 103 1.1.2.2 nathanw 104 1.1.2.4 nathanw CFATTACH_DECL(ofbus_root, sizeof(struct device), 105 1.1.2.4 nathanw ofbus_match, ofbus_attach, NULL, NULL); 106 1.1.2.2 nathanw 107 1.1.2.2 nathanw /**************************************************************/ 108 1.1.2.2 nathanw 109 1.1.2.2 nathanw 110 1.1.2.2 nathanw /* 111 1.1.2.2 nathanw * void boot(int howto, char *bootstr) 112 1.1.2.2 nathanw * 113 1.1.2.2 nathanw * Reboots the system, in event of: 114 1.1.2.2 nathanw * - reboot system call 115 1.1.2.2 nathanw * - panic 116 1.1.2.2 nathanw */ 117 1.1.2.2 nathanw 118 1.1.2.2 nathanw void 119 1.1.2.2 nathanw cpu_reboot(howto, bootstr) 120 1.1.2.2 nathanw int howto; 121 1.1.2.2 nathanw char *bootstr; 122 1.1.2.2 nathanw { 123 1.1.2.2 nathanw /* Just call OFW common routine. */ 124 1.1.2.2 nathanw ofw_boot(howto, bootstr); 125 1.1.2.2 nathanw 126 1.1.2.2 nathanw OF_boot("not reached -- stupid compiler"); 127 1.1.2.2 nathanw } 128 1.1.2.2 nathanw 129 1.1.2.2 nathanw 130 1.1.2.2 nathanw /* 131 1.1.2.2 nathanw * vaddr_t initarm(ofw_handle_t handle) 132 1.1.2.2 nathanw * 133 1.1.2.2 nathanw * Initial entry point on startup for a GENERIC OFW 134 1.1.2.2 nathanw * system. Called with MMU on, running in the OFW 135 1.1.2.2 nathanw * client environment. 136 1.1.2.2 nathanw * 137 1.1.2.2 nathanw * Major tasks are: 138 1.1.2.2 nathanw * - read the bootargs out of OFW; 139 1.1.2.2 nathanw * - take over memory management from OFW; 140 1.1.2.2 nathanw * - set-up the stacks 141 1.1.2.2 nathanw * - set-up the exception handlers 142 1.1.2.2 nathanw * 143 1.1.2.2 nathanw * Return the new stackptr (va) for the SVC frame. 144 1.1.2.2 nathanw * 145 1.1.2.2 nathanw */ 146 1.1.2.2 nathanw vaddr_t 147 1.1.2.2 nathanw initarm(ofw_handle) 148 1.1.2.2 nathanw ofw_handle_t ofw_handle; 149 1.1.2.2 nathanw { 150 1.1.2.2 nathanw set_cpufuncs(); 151 1.1.2.2 nathanw 152 1.1.2.2 nathanw /* XXX - set this somewhere else? -JJK */ 153 1.1.2.2 nathanw boothowto = 0; 154 1.1.2.2 nathanw 155 1.1.2.2 nathanw /* Init the OFW interface. */ 156 1.1.2.2 nathanw /* MUST do this before invoking any OFW client services! */ 157 1.1.2.2 nathanw ofw_init(ofw_handle); 158 1.1.2.2 nathanw 159 1.1.2.2 nathanw /* Initialize the console (which will call into OFW). */ 160 1.1.2.2 nathanw /* This will allow us to see panic messages and other printf output. */ 161 1.1.2.2 nathanw consinit(); 162 1.1.2.2 nathanw 163 1.1.2.2 nathanw /* Get boot info and process it. */ 164 1.1.2.2 nathanw ofw_getbootinfo(&boot_file, &boot_args); 165 1.1.2.2 nathanw process_kernel_args(); 166 1.1.2.2 nathanw 167 1.1.2.2 nathanw /* Configure memory. */ 168 1.1.2.2 nathanw ofw_configmem(); 169 1.1.2.2 nathanw 170 1.1.2.2 nathanw /* 171 1.1.2.2 nathanw * Set-up stacks. 172 1.1.2.2 nathanw * OFW has control of the interrupt frame. 173 1.1.2.2 nathanw * The kernel stack for SVC mode will be updated on return from 174 1.1.2.2 nathanw * this routine. All we need to do is prepare for abort-handling 175 1.1.2.2 nathanw * and undefined exceptions. 176 1.1.2.2 nathanw */ 177 1.1.2.2 nathanw set_stackptr(PSR_UND32_MODE, undstack.pv_va + NBPG); 178 1.1.2.2 nathanw set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + NBPG); 179 1.1.2.2 nathanw 180 1.1.2.2 nathanw /* Set-up exception handlers. 181 1.1.2.2 nathanw * Take control of selected vectors from OFW. 182 1.1.2.2 nathanw * We take: undefined, swi, pre-fetch abort, data abort, addrexc 183 1.1.2.2 nathanw * OFW retains: reset, irq, fiq 184 1.1.2.2 nathanw */ 185 1.1.2.3 nathanw arm32_vector_init(ARM_VECTORS_LOW, 186 1.1.2.3 nathanw ARM_VEC_ALL & ~(ARM_VEC_RESET|ARM_VEC_IRQ|ARM_VEC_FIQ)); 187 1.1.2.2 nathanw 188 1.1.2.2 nathanw data_abort_handler_address = (u_int)data_abort_handler; 189 1.1.2.2 nathanw prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 190 1.1.2.2 nathanw undefined_handler_address = 191 1.1.2.2 nathanw (u_int)undefinedinstruction_bounce; /* why is this needed? -JJK */ 192 1.1.2.2 nathanw 193 1.1.2.2 nathanw /* Initialise the undefined instruction handlers. */ 194 1.1.2.2 nathanw undefined_init(); 195 1.1.2.2 nathanw 196 1.1.2.2 nathanw /* Set-up the IRQ system. */ 197 1.1.2.2 nathanw irq_init(); 198 1.1.2.2 nathanw 199 1.1.2.2 nathanw #ifdef DDB 200 1.1.2.2 nathanw db_machine_init(); 201 1.1.2.2 nathanw #ifdef __ELF__ 202 1.1.2.2 nathanw ddb_init(0, NULL, NULL); /* XXX */ 203 1.1.2.2 nathanw #else 204 1.1.2.2 nathanw { 205 1.1.2.2 nathanw struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 206 1.1.2.2 nathanw extern int end; 207 1.1.2.2 nathanw extern char *esym; 208 1.1.2.2 nathanw 209 1.1.2.2 nathanw ddb_init(kernexec->a_syms, &end, esym); 210 1.1.2.2 nathanw } 211 1.1.2.2 nathanw #endif /* __ELF__ */ 212 1.1.2.2 nathanw 213 1.1.2.2 nathanw if (boothowto & RB_KDB) 214 1.1.2.2 nathanw Debugger(); 215 1.1.2.2 nathanw #endif 216 1.1.2.2 nathanw 217 1.1.2.2 nathanw /* Return the new stackbase. */ 218 1.1.2.2 nathanw return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 219 1.1.2.2 nathanw } 220 1.1.2.2 nathanw 221 1.1.2.2 nathanw 222 1.1.2.2 nathanw /* 223 1.1.2.2 nathanw * Set various globals based on contents of boot_args 224 1.1.2.2 nathanw * 225 1.1.2.2 nathanw * Note that this routine must NOT trash boot_args, as 226 1.1.2.2 nathanw * it is scanned by later routines. 227 1.1.2.2 nathanw * 228 1.1.2.2 nathanw * There ought to be a routine in machdep.c that does 229 1.1.2.2 nathanw * the generic bits of this. -JJK 230 1.1.2.2 nathanw */ 231 1.1.2.2 nathanw static void 232 1.1.2.2 nathanw process_kernel_args(void) 233 1.1.2.2 nathanw { 234 1.1.2.2 nathanw /* Process all the generic ARM boot options */ 235 1.1.2.2 nathanw parse_mi_bootargs(boot_args); 236 1.1.2.2 nathanw 237 1.1.2.2 nathanw /* Check for ofwgencfg-specific args here. */ 238 1.1.2.2 nathanw } 239 1.1.2.2 nathanw 240 1.1.2.2 nathanw 241 1.1.2.2 nathanw /* 242 1.1.2.2 nathanw * Walk the OFW device tree and configure found devices. 243 1.1.2.2 nathanw * 244 1.1.2.2 nathanw * Move this into common OFW module? -JJK 245 1.1.2.2 nathanw */ 246 1.1.2.2 nathanw void 247 1.1.2.2 nathanw ofrootfound(void) 248 1.1.2.2 nathanw { 249 1.1.2.2 nathanw int node; 250 1.1.2.2 nathanw struct ofbus_attach_args aa; 251 1.1.2.2 nathanw 252 1.1.2.2 nathanw if (!(node = OF_peer(0))) 253 1.1.2.2 nathanw panic("No OFW root"); 254 1.1.2.2 nathanw aa.oba_busname = "ofw"; 255 1.1.2.2 nathanw aa.oba_phandle = node; 256 1.1.2.2 nathanw if (!config_rootfound("ofbus", &aa)) 257 1.1.2.2 nathanw panic("ofw root ofbus not configured"); 258 1.1.2.2 nathanw } 259
Indexes created Sun Oct 26 21:10:03 GMT 2025