1 /* $NetBSD: arm32_machdep.c,v 1.46 2005/12/11 12:16:41 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Mark Brinicombe 21 * for the NetBSD Project. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * Machine dependant functions for kernel setup 39 * 40 * Created : 17/09/94 41 * Updated : 18/04/01 updated for new wscons 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: arm32_machdep.c,v 1.46 2005/12/11 12:16:41 christos Exp $"); 46 47 #include "opt_md.h" 48 #include "opt_pmap_debug.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/reboot.h> 53 #include <sys/proc.h> 54 #include <sys/user.h> 55 #include <sys/kernel.h> 56 #include <sys/mbuf.h> 57 #include <sys/mount.h> 58 #include <sys/buf.h> 59 #include <sys/msgbuf.h> 60 #include <sys/device.h> 61 #include <uvm/uvm_extern.h> 62 #include <sys/sysctl.h> 63 64 #include <dev/cons.h> 65 66 #include <arm/arm32/katelib.h> 67 #include <arm/arm32/machdep.h> 68 #include <machine/bootconfig.h> 69 70 #include "opt_ipkdb.h" 71 #include "md.h" 72 73 struct vm_map *exec_map = NULL; 74 struct vm_map *mb_map = NULL; 75 struct vm_map *phys_map = NULL; 76 77 extern int physmem; 78 79 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 80 extern size_t md_root_size; /* Memory disc size */ 81 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 82 83 pv_addr_t kernelstack; 84 85 /* the following is used externally (sysctl_hw) */ 86 char machine[] = MACHINE; /* from <machine/param.h> */ 87 char machine_arch[] = MACHINE_ARCH; /* from <machine/param.h> */ 88 89 /* Our exported CPU info; we can have only one. */ 90 struct cpu_info cpu_info_store; 91 92 caddr_t msgbufaddr; 93 extern paddr_t msgbufphys; 94 95 int kernel_debug = 0; 96 97 struct user *proc0paddr; 98 99 /* exported variable to be filled in by the bootloaders */ 100 char *booted_kernel; 101 102 103 /* Prototypes */ 104 105 void data_abort_handler __P((trapframe_t *frame)); 106 void prefetch_abort_handler __P((trapframe_t *frame)); 107 extern void configure __P((void)); 108 109 /* 110 * arm32_vector_init: 111 * 112 * Initialize the vector page, and select whether or not to 113 * relocate the vectors. 114 * 115 * NOTE: We expect the vector page to be mapped at its expected 116 * destination. 117 */ 118 void 119 arm32_vector_init(vaddr_t va, int which) 120 { 121 extern unsigned int page0[], page0_data[]; 122 unsigned int *vectors = (int *) va; 123 unsigned int *vectors_data = vectors + (page0_data - page0); 124 int vec; 125 126 /* 127 * Loop through the vectors we're taking over, and copy the 128 * vector's insn and data word. 129 */ 130 for (vec = 0; vec < ARM_NVEC; vec++) { 131 if ((which & (1 << vec)) == 0) { 132 /* Don't want to take over this vector. */ 133 continue; 134 } 135 vectors[vec] = page0[vec]; 136 vectors_data[vec] = page0_data[vec]; 137 } 138 139 /* Now sync the vectors. */ 140 cpu_icache_sync_range(va, (ARM_NVEC * 2) * sizeof(u_int)); 141 142 vector_page = va; 143 144 if (va == ARM_VECTORS_HIGH) { 145 /* 146 * Assume the MD caller knows what it's doing here, and 147 * really does want the vector page relocated. 148 * 149 * Note: This has to be done here (and not just in 150 * cpu_setup()) because the vector page needs to be 151 * accessible *before* cpu_startup() is called. 152 * Think ddb(9) ... 153 * 154 * NOTE: If the CPU control register is not readable, 155 * this will totally fail! We'll just assume that 156 * any system that has high vector support has a 157 * readable CPU control register, for now. If we 158 * ever encounter one that does not, we'll have to 159 * rethink this. 160 */ 161 cpu_control(CPU_CONTROL_VECRELOC, CPU_CONTROL_VECRELOC); 162 } 163 } 164 165 /* 166 * Debug function just to park the CPU 167 */ 168 169 void 170 halt() 171 { 172 while (1) 173 cpu_sleep(0); 174 } 175 176 177 /* Sync the discs and unmount the filesystems */ 178 179 void 180 bootsync(void) 181 { 182 static int bootsyncdone = 0; 183 184 if (bootsyncdone) return; 185 186 bootsyncdone = 1; 187 188 /* Make sure we can still manage to do things */ 189 if (GetCPSR() & I32_bit) { 190 /* 191 * If we get here then boot has been called without RB_NOSYNC 192 * and interrupts were disabled. This means the boot() call 193 * did not come from a user process e.g. shutdown, but must 194 * have come from somewhere in the kernel. 195 */ 196 IRQenable; 197 printf("Warning IRQ's disabled during boot()\n"); 198 } 199 200 vfs_shutdown(); 201 } 202 203 /* 204 * void cpu_startup(void) 205 * 206 * Machine dependant startup code. 207 * 208 */ 209 void 210 cpu_startup() 211 { 212 vaddr_t minaddr; 213 vaddr_t maxaddr; 214 u_int loop; 215 char pbuf[9]; 216 217 /* Set the CPU control register */ 218 cpu_setup(boot_args); 219 220 /* Lock down zero page */ 221 vector_page_setprot(VM_PROT_READ); 222 223 /* 224 * Give pmap a chance to set up a few more things now the vm 225 * is initialised 226 */ 227 pmap_postinit(); 228 229 /* 230 * Initialize error message buffer (at end of core). 231 */ 232 233 /* msgbufphys was setup during the secondary boot strap */ 234 for (loop = 0; loop < btoc(MSGBUFSIZE); ++loop) 235 pmap_kenter_pa((vaddr_t)msgbufaddr + loop * PAGE_SIZE, 236 msgbufphys + loop * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE); 237 pmap_update(pmap_kernel()); 238 initmsgbuf(msgbufaddr, round_page(MSGBUFSIZE)); 239 240 /* 241 * Identify ourselves for the msgbuf (everything printed earlier will 242 * not be buffered). 243 */ 244 printf("%s%s", copyright, version); 245 246 format_bytes(pbuf, sizeof(pbuf), arm_ptob(physmem)); 247 printf("total memory = %s\n", pbuf); 248 249 minaddr = 0; 250 251 /* 252 * Allocate a submap for exec arguments. This map effectively 253 * limits the number of processes exec'ing at any time. 254 */ 255 exec_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 256 16*NCARGS, VM_MAP_PAGEABLE, FALSE, NULL); 257 258 /* 259 * Allocate a submap for physio 260 */ 261 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 262 VM_PHYS_SIZE, 0, FALSE, NULL); 263 264 /* 265 * Finally, allocate mbuf cluster submap. 266 */ 267 mb_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr, 268 nmbclusters * mclbytes, VM_MAP_INTRSAFE, 269 FALSE, NULL); 270 271 format_bytes(pbuf, sizeof(pbuf), ptoa(uvmexp.free)); 272 printf("avail memory = %s\n", pbuf); 273 274 curpcb = &lwp0.l_addr->u_pcb; 275 curpcb->pcb_flags = 0; 276 curpcb->pcb_un.un_32.pcb32_und_sp = (u_int)lwp0.l_addr + 277 USPACE_UNDEF_STACK_TOP; 278 curpcb->pcb_un.un_32.pcb32_sp = (u_int)lwp0.l_addr + 279 USPACE_SVC_STACK_TOP; 280 pmap_set_pcb_pagedir(pmap_kernel(), curpcb); 281 282 curpcb->pcb_tf = (struct trapframe *)curpcb->pcb_un.un_32.pcb32_sp - 1; 283 } 284 285 /* 286 * machine dependent system variables. 287 */ 288 static int 289 sysctl_machdep_booted_device(SYSCTLFN_ARGS) 290 { 291 struct sysctlnode node; 292 293 if (booted_device == NULL) 294 return (EOPNOTSUPP); 295 296 node = *rnode; 297 node.sysctl_data = booted_device->dv_xname; 298 node.sysctl_size = strlen(booted_device->dv_xname) + 1; 299 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 300 } 301 302 static int 303 sysctl_machdep_booted_kernel(SYSCTLFN_ARGS) 304 { 305 struct sysctlnode node; 306 307 if (booted_kernel == NULL || booted_kernel[0] == '\0') 308 return (EOPNOTSUPP); 309 310 node = *rnode; 311 node.sysctl_data = booted_kernel; 312 node.sysctl_size = strlen(booted_kernel) + 1; 313 return (sysctl_lookup(SYSCTLFN_CALL(&node))); 314 } 315 316 static int 317 sysctl_machdep_powersave(SYSCTLFN_ARGS) 318 { 319 struct sysctlnode node = *rnode; 320 int error, newval; 321 322 newval = cpu_do_powersave; 323 node.sysctl_data = &newval; 324 if (cpufuncs.cf_sleep == (void *) cpufunc_nullop) 325 node.sysctl_flags &= ~CTLFLAG_READWRITE; 326 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 327 if (error || newp == NULL || newval == cpu_do_powersave) 328 return (error); 329 330 if (newval < 0 || newval > 1) 331 return (EINVAL); 332 cpu_do_powersave = newval; 333 334 return (0); 335 } 336 337 SYSCTL_SETUP(sysctl_machdep_setup, "sysctl machdep subtree setup") 338 { 339 340 sysctl_createv(clog, 0, NULL, NULL, 341 CTLFLAG_PERMANENT, 342 CTLTYPE_NODE, "machdep", NULL, 343 NULL, 0, NULL, 0, 344 CTL_MACHDEP, CTL_EOL); 345 346 sysctl_createv(clog, 0, NULL, NULL, 347 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 348 CTLTYPE_INT, "debug", NULL, 349 NULL, 0, &kernel_debug, 0, 350 CTL_MACHDEP, CPU_DEBUG, CTL_EOL); 351 sysctl_createv(clog, 0, NULL, NULL, 352 CTLFLAG_PERMANENT, 353 CTLTYPE_STRING, "booted_device", NULL, 354 sysctl_machdep_booted_device, 0, NULL, 0, 355 CTL_MACHDEP, CPU_BOOTED_DEVICE, CTL_EOL); 356 sysctl_createv(clog, 0, NULL, NULL, 357 CTLFLAG_PERMANENT, 358 CTLTYPE_STRING, "booted_kernel", NULL, 359 sysctl_machdep_booted_kernel, 0, NULL, 0, 360 CTL_MACHDEP, CPU_BOOTED_KERNEL, CTL_EOL); 361 sysctl_createv(clog, 0, NULL, NULL, 362 CTLFLAG_PERMANENT, 363 CTLTYPE_STRUCT, "console_device", NULL, 364 sysctl_consdev, 0, NULL, sizeof(dev_t), 365 CTL_MACHDEP, CPU_CONSDEV, CTL_EOL); 366 sysctl_createv(clog, 0, NULL, NULL, 367 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 368 CTLTYPE_INT, "powersave", NULL, 369 sysctl_machdep_powersave, 0, &cpu_do_powersave, 0, 370 CTL_MACHDEP, CPU_POWERSAVE, CTL_EOL); 371 } 372 373 void 374 parse_mi_bootargs(args) 375 char *args; 376 { 377 int integer; 378 379 if (get_bootconf_option(args, "single", BOOTOPT_TYPE_BOOLEAN, &integer) 380 || get_bootconf_option(args, "-s", BOOTOPT_TYPE_BOOLEAN, &integer)) 381 if (integer) 382 boothowto |= RB_SINGLE; 383 if (get_bootconf_option(args, "kdb", BOOTOPT_TYPE_BOOLEAN, &integer) 384 || get_bootconf_option(args, "-k", BOOTOPT_TYPE_BOOLEAN, &integer)) 385 if (integer) 386 boothowto |= RB_KDB; 387 if (get_bootconf_option(args, "ask", BOOTOPT_TYPE_BOOLEAN, &integer) 388 || get_bootconf_option(args, "-a", BOOTOPT_TYPE_BOOLEAN, &integer)) 389 if (integer) 390 boothowto |= RB_ASKNAME; 391 392 #ifdef PMAP_DEBUG 393 if (get_bootconf_option(args, "pmapdebug", BOOTOPT_TYPE_INT, &integer)) { 394 pmap_debug_level = integer; 395 pmap_debug(pmap_debug_level); 396 } 397 #endif /* PMAP_DEBUG */ 398 399 /* if (get_bootconf_option(args, "nbuf", BOOTOPT_TYPE_INT, &integer)) 400 bufpages = integer;*/ 401 402 #if NMD > 0 && defined(MEMORY_DISK_HOOKS) && !defined(MEMORY_DISK_ROOT_SIZE) 403 if (get_bootconf_option(args, "memorydisc", BOOTOPT_TYPE_INT, &integer) 404 || get_bootconf_option(args, "memorydisk", BOOTOPT_TYPE_INT, &integer)) { 405 md_root_size = integer; 406 md_root_size *= 1024; 407 if (md_root_size < 32*1024) 408 md_root_size = 32*1024; 409 if (md_root_size > 2048*1024) 410 md_root_size = 2048*1024; 411 } 412 #endif /* NMD && MEMORY_DISK_HOOKS && !MEMORY_DISK_ROOT_SIZE */ 413 414 if (get_bootconf_option(args, "quiet", BOOTOPT_TYPE_BOOLEAN, &integer) 415 || get_bootconf_option(args, "-q", BOOTOPT_TYPE_BOOLEAN, &integer)) 416 if (integer) 417 boothowto |= AB_QUIET; 418 if (get_bootconf_option(args, "verbose", BOOTOPT_TYPE_BOOLEAN, &integer) 419 || get_bootconf_option(args, "-v", BOOTOPT_TYPE_BOOLEAN, &integer)) 420 if (integer) 421 boothowto |= AB_VERBOSE; 422 } 423