armadillo9_machdep.c revision 1.7
1 /* $NetBSD: armadillo9_machdep.c,v 1.7 2006/05/05 18:04:41 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Based on code written by Jason R. Thorpe and Steve C. Woodford for 8 * Wasabi Systems, Inc. 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 for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1997,1998 Mark Brinicombe. 41 * Copyright (c) 1997,1998 Causality Limited. 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Mark Brinicombe 55 * for the NetBSD Project. 56 * 4. The name of the company nor the name of the author may be used to 57 * endorse or promote products derived from this software without specific 58 * prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 61 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 62 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 64 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 65 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 66 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * Machine dependant functions for kernel setup for Armadillo. 73 */ 74 75 /* Armadillo-9 physical memory map 76 0000 0000 - 0fff ffff reserved 77 1000 0000 - 1000 000f I/O Control Register 78 1000 0010 - 11dd ffff reserved 79 1200 0000 - 1200 ffff PC/104 I/O space (8bit) 80 1201 0000 - 12ff ffff reserved 81 1300 0000 - 13ff ffff PC/104 Memory space (8bit) 82 1400 0000 - 1fff ffff reserved 83 2000 0000 - 21ff ffff reserved 84 2200 0000 - 2200 ffff PC/104 I/O space (16bit) 85 2201 0000 - 22ff ffff reserved 86 2300 0000 - 23ff ffff PC/104 Memory space (16bit) 87 2400 0000 - 2fff ffff reserved 88 3000 0000 - 3fff ffff reserved 89 4000 0000 - 43ff ffff Compact Flash I/O space 90 4400 0000 - 47ff ffff reserved 91 4800 0000 - 4bff ffff Compact Flash Attribute space 92 4c00 0000 - 4fff ffff Compact Flash memory space 93 5000 0000 - 5fff ffff reserved 94 6000 0000 - 607f ffff Flash Memory (8MByte) 95 6080 0000 - 6fff ffff reserved 96 7000 0000 - 7fff ffff reserved 97 8000 0000 - 8008 ffff EP9315 Internal Register (AHB) 98 8009 0000 - 8009 3fff Internal Boot ROM (16kByte) 99 8009 4000 - 8009 ffff reserved 100 800a 0000 - 800f ffff EP9315 Internal Register (AHB) 101 8010 0000 - 807f ffff reserved 102 8080 0000 - 8094 ffff EP9315 Internal Register (APB) 103 8095 0000 - 8fff ffff reserved 104 9000 0000 - bfff ffff reserved 105 c000 0000 - c1ff ffff SDRAM (32MByte) 106 c200 0000 - c3ff ffff reserved 107 c400 0000 - c5ff ffff SDRAM (32MByte) 108 c600 0000 - cfff ffff reserved 109 d000 0000 - ffff ffff reserved 110 */ 111 112 #include <sys/cdefs.h> 113 __KERNEL_RCSID(0, "$NetBSD: armadillo9_machdep.c,v 1.7 2006/05/05 18:04:41 thorpej Exp $"); 114 115 #include "opt_ddb.h" 116 #include "opt_kgdb.h" 117 #include "opt_pmap_debug.h" 118 119 #include <sys/param.h> 120 #include <sys/device.h> 121 #include <sys/systm.h> 122 #include <sys/kernel.h> 123 #include <sys/exec.h> 124 #include <sys/proc.h> 125 #include <sys/msgbuf.h> 126 #include <sys/reboot.h> 127 #include <sys/termios.h> 128 #include <sys/ksyms.h> 129 130 #include <net/if.h> 131 #include <net/if_ether.h> 132 133 #include <uvm/uvm_extern.h> 134 135 #include <dev/cons.h> 136 137 #include <machine/db_machdep.h> 138 #include <ddb/db_sym.h> 139 #include <ddb/db_extern.h> 140 141 #define DRAM_BLOCKS 4 142 #include <machine/bootconfig.h> 143 #include <machine/autoconf.h> 144 #include <machine/bus.h> 145 #include <machine/cpu.h> 146 #include <machine/frame.h> 147 #include <arm/undefined.h> 148 149 #include <arm/arm32/machdep.h> 150 151 #include <arm/ep93xx/ep93xxreg.h> 152 #include <arm/ep93xx/ep93xxvar.h> 153 154 #include "epwdog.h" 155 #if NEPWDOG > 0 156 #include <arm/ep93xx/epwdogvar.h> 157 #endif 158 #include <arm/ep93xx/epwdogreg.h> 159 160 #include <dev/ic/comreg.h> 161 #include <dev/ic/comvar.h> 162 163 #include "epcom.h" 164 #if NEPCOM > 0 165 #include <arm/ep93xx/epcomvar.h> 166 #endif 167 168 #include "isa.h" 169 #if NISA > 0 170 #include <dev/isa/isareg.h> 171 #include <dev/isa/isavar.h> 172 #endif 173 174 #include <machine/isa_machdep.h> 175 176 #include <evbarm/armadillo/armadillo9reg.h> 177 #include <evbarm/armadillo/armadillo9var.h> 178 179 struct armadillo_model_t *armadillo_model = 0; 180 static struct armadillo_model_t armadillo_model_table[] = { 181 { DEVCFG_ARMADILLO9, "Armadillo-9" }, 182 { DEVCFG_ARMADILLO210, "Armadillo-210" }, 183 { 0, "Armadillo(unknown model)" } }; 184 185 #include "opt_ipkdb.h" 186 #include "ksyms.h" 187 188 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 189 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 190 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 191 192 /* 193 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 194 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 195 */ 196 #define KERNEL_VM_SIZE 0x0c000000 197 198 /* 199 * Address to call from cpu_reset() to reset the machine. 200 * This is machine architecture dependant as it varies depending 201 * on where the ROM appears when you turn the MMU off. 202 */ 203 204 u_int cpu_reset_address = 0x80090000; 205 206 /* Define various stack sizes in pages */ 207 #define IRQ_STACK_SIZE 8 208 #define ABT_STACK_SIZE 8 209 #ifdef IPKDB 210 #define UND_STACK_SIZE 16 211 #else 212 #define UND_STACK_SIZE 8 213 #endif 214 215 BootConfig bootconfig; /* Boot config storage */ 216 char *boot_args = NULL; 217 char *boot_file = NULL; 218 219 vm_offset_t physical_start; 220 vm_offset_t physical_freestart; 221 vm_offset_t physical_freeend; 222 vm_offset_t physical_freeend_low; 223 vm_offset_t physical_end; 224 u_int free_pages; 225 int physmem = 0; 226 227 /* Physical and virtual addresses for some global pages */ 228 pv_addr_t systempage; 229 pv_addr_t irqstack; 230 pv_addr_t undstack; 231 pv_addr_t abtstack; 232 pv_addr_t kernelstack; 233 234 vm_offset_t msgbufphys; 235 236 static struct arm32_dma_range armadillo9_dma_ranges[4]; 237 238 #if NISA > 0 239 extern void isa_armadillo9_init(u_int, u_int); 240 #endif 241 242 extern u_int data_abort_handler_address; 243 extern u_int prefetch_abort_handler_address; 244 extern u_int undefined_handler_address; 245 246 #ifdef PMAP_DEBUG 247 extern int pmap_debug_level; 248 #endif 249 250 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 251 252 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 253 #define KERNEL_PT_KERNEL_NUM 4 254 /* L2 tables for mapping kernel VM */ 255 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 256 257 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 258 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 259 260 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 261 262 struct user *proc0paddr; 263 264 /* Prototypes */ 265 266 void consinit(void); 267 /* 268 * Define the default console speed for the machine. 269 */ 270 #if NEPCOM > 0 271 #ifndef CONSPEED 272 #define CONSPEED B115200 273 #endif /* ! CONSPEED */ 274 275 #ifndef CONMODE 276 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 277 #endif 278 279 #ifndef CONUNIT 280 #define CONUNIT 0 281 #endif 282 283 int comcnspeed = CONSPEED; 284 int comcnmode = CONMODE; 285 const unsigned long comaddr[] = { 286 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 287 #endif 288 289 #if KGDB 290 #ifndef KGDB_DEVNAME 291 #error Must define KGDB_DEVNAME 292 #endif 293 const char kgdb_devname[] = KGDB_DEVNAME; 294 295 #ifndef KGDB_DEVADDR 296 #error Must define KGDB_DEVADDR 297 #endif 298 unsigned long kgdb_devaddr = KGDB_DEVADDR; 299 300 #ifndef KGDB_DEVRATE 301 #define KGDB_DEVRATE CONSPEED 302 #endif 303 int kgdb_devrate = KGDB_DEVRATE; 304 305 #ifndef KGDB_DEVMODE 306 #define KGDB_DEVMODE CONMODE 307 #endif 308 int kgdb_devmode = KGDB_DEVMODE; 309 #endif /* KGDB */ 310 311 /* 312 * MAC address for the built-in Ethernet. 313 */ 314 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 315 316 static void 317 armadillo9_device_register(device_t dev, void *aux) 318 { 319 320 /* MAC address for the built-in Ethernet. */ 321 if (device_is_a(dev, "epe")) { 322 prop_data_t pd = prop_data_create_data_nocopy( 323 armadillo9_ethaddr, ETHER_ADDR_LEN); 324 KASSERT(pd != NULL); 325 if (prop_dictionary_set(device_properties(dev), 326 "mac-addr", pd) == FALSE) { 327 printf("WARNING: unable to set mac-addr property " 328 "for %s\n", dev->dv_xname); 329 } 330 prop_object_release(pd); 331 } 332 } 333 334 /* 335 * void cpu_reboot(int howto, char *bootstr) 336 * 337 * Reboots the system 338 * 339 * Deal with any syncing, unmounting, dumping and shutdown hooks, 340 * then reset the CPU. 341 */ 342 void 343 cpu_reboot(int howto, char *bootstr) 344 { 345 /* 346 * If we are still cold then hit the air brakes 347 * and crash to earth fast 348 */ 349 if (cold) { 350 doshutdownhooks(); 351 printf("\r\n"); 352 printf("The operating system has halted.\r\n"); 353 printf("Please press any key to reboot.\r\n"); 354 cngetc(); 355 printf("\r\nrebooting...\r\n"); 356 goto reset; 357 } 358 359 /* Disable console buffering */ 360 361 /* 362 * If RB_NOSYNC was not specified sync the discs. 363 * Note: Unless cold is set to 1 here, syslogd will die during the 364 * unmount. It looks like syslogd is getting woken up only to find 365 * that it cannot page part of the binary in as the filesystem has 366 * been unmounted. 367 */ 368 if (!(howto & RB_NOSYNC)) 369 bootsync(); 370 371 /* Say NO to interrupts */ 372 splhigh(); 373 374 /* Do a dump if requested. */ 375 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 376 dumpsys(); 377 378 /* Run any shutdown hooks */ 379 doshutdownhooks(); 380 381 /* Make sure IRQ's are disabled */ 382 IRQdisable; 383 384 if (howto & RB_HALT) { 385 printf("\r\n"); 386 printf("The operating system has halted.\r\n"); 387 printf("Please press any key to reboot.\r\n"); 388 cngetc(); 389 } 390 391 printf("\r\nrebooting...\r\n"); 392 reset: 393 /* 394 * Make really really sure that all interrupts are disabled, 395 * and poke the Internal Bus and Peripheral Bus reset lines. 396 */ 397 (void) disable_interrupts(I32_bit|F32_bit); 398 #if NEPWDOG > 0 399 epwdog_reset(); 400 #else 401 { 402 u_int32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 403 u_int32_t val = EP93XX_WDOG_ENABLE; 404 __asm volatile ( 405 "str %1, [%0]\n" 406 : 407 : "r" (ctrl), "r" (val) 408 ); 409 } 410 #endif 411 for (;;); 412 } 413 414 /* Static device mappings. */ 415 static const struct pmap_devmap armadillo9_devmap[] = { 416 { 417 EP93XX_AHB_VBASE, 418 EP93XX_AHB_HWBASE, 419 EP93XX_AHB_SIZE, 420 VM_PROT_READ|VM_PROT_WRITE, 421 PTE_NOCACHE, 422 }, 423 424 { 425 EP93XX_APB_VBASE, 426 EP93XX_APB_HWBASE, 427 EP93XX_APB_SIZE, 428 VM_PROT_READ|VM_PROT_WRITE, 429 PTE_NOCACHE, 430 }, 431 432 { 433 EP93XX_PCMCIA0_VBASE, 434 EP93XX_PCMCIA0_HWBASE, 435 EP93XX_PCMCIA_SIZE, 436 VM_PROT_READ|VM_PROT_WRITE, 437 PTE_NOCACHE, 438 }, 439 440 /* 441 * IO8 and IO16 space *must* be mapped contiguously with 442 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 443 * on that! 444 */ 445 { 446 ARMADILLO9_IO8_VBASE, 447 ARMADILLO9_IO8_HWBASE, 448 ARMADILLO9_IO8_SIZE, 449 VM_PROT_READ|VM_PROT_WRITE, 450 PTE_NOCACHE, 451 }, 452 453 { 454 ARMADILLO9_IO16_VBASE, 455 ARMADILLO9_IO16_HWBASE, 456 ARMADILLO9_IO16_SIZE, 457 VM_PROT_READ|VM_PROT_WRITE, 458 PTE_NOCACHE, 459 }, 460 461 { 462 0, 463 0, 464 0, 465 0, 466 0, 467 } 468 }; 469 470 /* 471 * u_int initarm(...) 472 * 473 * Initial entry point on startup. This gets called before main() is 474 * entered. 475 * It should be responsible for setting up everything that must be 476 * in place when main is called. 477 * This includes 478 * Taking a copy of the boot configuration structure. 479 * Initialising the physical console so characters can be printed. 480 * Setting up page tables for the kernel 481 * Initialising interrupt controllers to a sane default state 482 */ 483 u_int 484 initarm(void *arg) 485 { 486 int loop; 487 int loop1; 488 u_int l1pagetable; 489 pv_addr_t kernel_l1pt; 490 struct bootparam_tag *bootparam_p; 491 unsigned long devcfg; 492 493 /* 494 * Since we map the on-board devices VA==PA, and the kernel 495 * is running VA==PA, it's possible for us to initialize 496 * the console now. 497 */ 498 consinit(); 499 500 /* identify model */ 501 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 502 + EP93XX_APB_SYSCON 503 + EP93XX_SYSCON_DeviceCfg)); 504 for (armadillo_model = &armadillo_model_table[0]; 505 armadillo_model->devcfg; armadillo_model++) 506 if (devcfg == armadillo_model->devcfg) 507 break; 508 509 /* Talk to the user */ 510 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 511 512 /* set some informations from bootloader */ 513 bootparam_p = (struct bootparam_tag *)bootparam; 514 bootconfig.dramblocks = 0; 515 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 516 switch (bootparam_p->hdr.tag) { 517 case BOOTPARAM_TAG_MEM: 518 if (bootconfig.dramblocks < DRAM_BLOCKS) { 519 #ifdef VERBOSE_INIT_ARM 520 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 521 bootconfig.dramblocks, 522 bootparam_p->u.mem.start, 523 bootparam_p->u.mem.size); 524 #endif 525 bootconfig.dram[bootconfig.dramblocks].address = 526 bootparam_p->u.mem.start; 527 bootconfig.dram[bootconfig.dramblocks].pages = 528 bootparam_p->u.mem.size / PAGE_SIZE; 529 bootconfig.dramblocks++; 530 } 531 break; 532 case BOOTPARAM_TAG_CMDLINE: 533 #ifdef VERBOSE_INIT_ARM 534 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 535 #endif 536 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 537 break; 538 } 539 bootparam_p = bootparam_tag_next(bootparam_p); 540 } 541 542 /* 543 * Heads up ... Setup the CPU / MMU / TLB functions 544 */ 545 if (set_cpufuncs()) 546 panic("cpu not recognized!"); 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("initarm: Configuring system ...\n"); 550 #endif 551 /* 552 * Set up the variables that define the availablilty of 553 * physical memory. For now, we're going to set 554 * physical_freestart to 0xc0200000 (where the kernel 555 * was loaded), and allocate the memory we need downwards. 556 * If we get too close to the L1 table that we set up, we 557 * will panic. We will update physical_freestart and 558 * physical_freeend later to reflect what pmap_bootstrap() 559 * wants to see. 560 * 561 * XXX pmap_bootstrap() needs an enema. 562 */ 563 physical_start = bootconfig.dram[0].address; 564 physical_end = bootconfig.dram[0].address 565 + (bootconfig.dram[0].pages * PAGE_SIZE); 566 567 physical_freestart = 0xc0018000UL; 568 physical_freeend = 0xc0200000UL; 569 570 physmem = (physical_end - physical_start) / PAGE_SIZE; 571 572 #ifdef VERBOSE_INIT_ARM 573 /* Tell the user about the memory */ 574 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 575 physical_start, physical_end - 1); 576 #endif 577 578 /* 579 * Okay, the kernel starts 2MB in from the bottom of physical 580 * memory. We are going to allocate our bootstrap pages downwards 581 * from there. 582 * 583 * We need to allocate some fixed page tables to get the kernel 584 * going. We allocate one page directory and a number of page 585 * tables and store the physical addresses in the kernel_pt_table 586 * array. 587 * 588 * The kernel page directory must be on a 16K boundary. The page 589 * tables must be on 4K bounaries. What we do is allocate the 590 * page directory on the first 16K boundary that we encounter, and 591 * the page tables on 4K boundaries otherwise. Since we allocate 592 * at least 3 L2 page tables, we are guaranteed to encounter at 593 * least one 16K aligned region. 594 */ 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("Allocating page tables\n"); 598 #endif 599 600 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 601 602 #ifdef VERBOSE_INIT_ARM 603 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 604 physical_freestart, free_pages, free_pages); 605 #endif 606 607 /* Define a macro to simplify memory allocation */ 608 #define valloc_pages(var, np) \ 609 alloc_pages((var).pv_pa, (np)); \ 610 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 611 612 #define alloc_pages(var, np) \ 613 physical_freeend -= ((np) * PAGE_SIZE); \ 614 if (physical_freeend < physical_freestart) \ 615 panic("initarm: out of memory"); \ 616 (var) = physical_freeend; \ 617 free_pages -= (np); \ 618 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 619 620 loop1 = 0; 621 kernel_l1pt.pv_pa = 0; 622 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 623 /* Are we 16KB aligned for an L1 ? */ 624 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 625 && kernel_l1pt.pv_pa == 0) { 626 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 627 } else { 628 valloc_pages(kernel_pt_table[loop1], 629 L2_TABLE_SIZE / PAGE_SIZE); 630 ++loop1; 631 } 632 } 633 634 /* This should never be able to happen but better confirm that. */ 635 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 636 panic("initarm: Failed to align the kernel page directory"); 637 638 /* 639 * Allocate a page for the system vectors page 640 */ 641 alloc_pages(systempage.pv_pa, 1); 642 643 /* Allocate stacks for all modes */ 644 valloc_pages(irqstack, IRQ_STACK_SIZE); 645 valloc_pages(abtstack, ABT_STACK_SIZE); 646 valloc_pages(undstack, UND_STACK_SIZE); 647 valloc_pages(kernelstack, UPAGES); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 651 irqstack.pv_va); 652 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 653 abtstack.pv_va); 654 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 655 undstack.pv_va); 656 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 657 kernelstack.pv_va); 658 #endif 659 660 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 661 662 /* 663 * Ok we have allocated physical pages for the primary kernel 664 * page tables. Save physical_freeend for when we give whats left 665 * of memory below 2Mbyte to UVM. 666 */ 667 668 physical_freeend_low = physical_freeend; 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 672 #endif 673 674 /* 675 * Now we start construction of the L1 page table 676 * We start by mapping the L2 page tables into the L1. 677 * This means that we can replace L1 mappings later on if necessary 678 */ 679 l1pagetable = kernel_l1pt.pv_pa; 680 681 /* Map the L2 pages tables in the L1 page table */ 682 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 683 &kernel_pt_table[KERNEL_PT_SYS]); 684 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 685 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 686 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 687 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 688 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 689 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 690 691 /* update the top of the kernel VM */ 692 pmap_curmaxkvaddr = 693 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 694 695 #ifdef VERBOSE_INIT_ARM 696 printf("Mapping kernel\n"); 697 #endif 698 699 /* Now we fill in the L2 pagetable for the kernel static code/data */ 700 { 701 extern char etext[], _end[]; 702 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 703 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 704 u_int logical; 705 706 textsize = (textsize + PGOFSET) & ~PGOFSET; 707 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 708 709 logical = 0x00200000; /* offset of kernel in RAM */ 710 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 711 physical_start + logical, textsize, 712 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 713 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 714 physical_start + logical, totalsize - textsize, 715 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 716 } 717 718 #ifdef VERBOSE_INIT_ARM 719 printf("Constructing L2 page tables\n"); 720 #endif 721 722 /* Map the stack pages */ 723 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 724 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 725 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 726 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 728 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 729 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 730 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 731 732 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 733 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 734 735 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 736 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 737 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 738 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 739 } 740 741 /* Map the vector page. */ 742 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 743 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 744 745 /* Map the statically mapped devices. */ 746 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 747 748 /* 749 * Update the physical_freestart/physical_freeend/free_pages 750 * variables. 751 */ 752 { 753 extern char _end[]; 754 755 physical_freestart = physical_start + 756 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 757 KERNEL_BASE); 758 physical_freeend = physical_end; 759 free_pages = 760 (physical_freeend - physical_freestart) / PAGE_SIZE; 761 } 762 763 /* 764 * Now we have the real page tables in place so we can switch to them. 765 * Once this is done we will be running with the REAL kernel page 766 * tables. 767 */ 768 769 /* Switch tables */ 770 #ifdef VERBOSE_INIT_ARM 771 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 772 physical_freestart, free_pages, free_pages); 773 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 774 #endif 775 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 776 setttb(kernel_l1pt.pv_pa); 777 cpu_tlb_flushID(); 778 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 779 780 /* 781 * Moved from cpu_startup() as data_abort_handler() references 782 * this during uvm init 783 */ 784 proc0paddr = (struct user *)kernelstack.pv_va; 785 lwp0.l_addr = proc0paddr; 786 787 #ifdef VERBOSE_INIT_ARM 788 printf("done!\n"); 789 #endif 790 791 #ifdef VERBOSE_INIT_ARM 792 printf("bootstrap done.\n"); 793 #endif 794 795 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 796 797 /* 798 * Pages were allocated during the secondary bootstrap for the 799 * stacks for different CPU modes. 800 * We must now set the r13 registers in the different CPU modes to 801 * point to these stacks. 802 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 803 * of the stack memory. 804 */ 805 #ifdef VERBOSE_INIT_ARM 806 printf("init subsystems: stacks "); 807 #endif 808 809 set_stackptr(PSR_IRQ32_MODE, 810 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 811 set_stackptr(PSR_ABT32_MODE, 812 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 813 set_stackptr(PSR_UND32_MODE, 814 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 815 816 /* 817 * Well we should set a data abort handler. 818 * Once things get going this will change as we will need a proper 819 * handler. 820 * Until then we will use a handler that just panics but tells us 821 * why. 822 * Initialisation of the vectors will just panic on a data abort. 823 * This just fills in a slightly better one. 824 */ 825 #ifdef VERBOSE_INIT_ARM 826 printf("vectors "); 827 #endif 828 data_abort_handler_address = (u_int)data_abort_handler; 829 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 830 undefined_handler_address = (u_int)undefinedinstruction_bounce; 831 832 /* Initialise the undefined instruction handlers */ 833 #ifdef VERBOSE_INIT_ARM 834 printf("undefined "); 835 #endif 836 undefined_init(); 837 838 /* Load memory into UVM. */ 839 #ifdef VERBOSE_INIT_ARM 840 printf("page "); 841 #endif 842 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 843 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 844 atop(physical_freestart), atop(physical_freeend), 845 VM_FREELIST_DEFAULT); 846 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 847 atop(0xc0000000), atop(physical_freeend_low), 848 VM_FREELIST_DEFAULT); 849 physmem = bootconfig.dram[0].pages; 850 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 851 size_t start = bootconfig.dram[loop].address; 852 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 853 uvm_page_physload(atop(start), atop(start + size), 854 atop(start), atop(start + size), 855 VM_FREELIST_DEFAULT); 856 physmem += bootconfig.dram[loop].pages; 857 } 858 859 /* Boot strap pmap telling it where the kernel page table is */ 860 #ifdef VERBOSE_INIT_ARM 861 printf("pmap "); 862 #endif 863 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 864 KERNEL_VM_BASE + KERNEL_VM_SIZE); 865 866 /* Setup the IRQ system */ 867 #ifdef VERBOSE_INIT_ARM 868 printf("irq "); 869 #endif 870 ep93xx_intr_init(); 871 #if NISA > 0 872 isa_intr_init(); 873 874 #ifdef VERBOSE_INIT_ARM 875 printf("isa "); 876 #endif 877 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 878 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 879 #endif 880 881 #ifdef VERBOSE_INIT_ARM 882 printf("done.\n"); 883 #endif 884 885 #ifdef BOOTHOWTO 886 boothowto = BOOTHOWTO; 887 #endif 888 889 #ifdef IPKDB 890 /* Initialise ipkdb */ 891 ipkdb_init(); 892 if (boothowto & RB_KDB) 893 ipkdb_connect(0); 894 #endif 895 896 #if NKSYMS || defined(DDB) || defined(LKM) 897 /* Firmware doesn't load symbols. */ 898 ksyms_init(0, NULL, NULL); 899 #endif 900 901 #ifdef DDB 902 db_machine_init(); 903 if (boothowto & RB_KDB) 904 Debugger(); 905 #endif 906 907 /* We have our own device_register() */ 908 evbarm_device_register = armadillo9_device_register; 909 910 /* We return the new stack pointer address */ 911 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 912 } 913 914 void 915 consinit(void) 916 { 917 static int consinit_called; 918 #if NEPCOM > 0 919 bus_space_handle_t ioh; 920 #endif 921 922 if (consinit_called != 0) 923 return; 924 925 consinit_called = 1; 926 927 /* 928 * Console devices are already mapped in VA. Our devmap reflects 929 * this, so register it now so drivers can map the console 930 * device. 931 */ 932 pmap_devmap_register(armadillo9_devmap); 933 934 #if NEPCOM > 0 935 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 936 EP93XX_APB_UART_SIZE, 0, &ioh); 937 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 938 ioh, comcnspeed, comcnmode)) 939 { 940 panic("can't init serial console"); 941 } 942 #else 943 panic("serial console not configured"); 944 #endif 945 #if KGDB 946 #if NEPCOM > 0 947 if (strcmp(kgdb_devname, "epcom") == 0) { 948 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 949 kgdb_devmode); 950 } 951 #endif /* NEPCOM > 0 */ 952 #endif /* KGDB */ 953 } 954 955 956 bus_dma_tag_t 957 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 958 { 959 int i; 960 struct arm32_bus_dma_tag *dmat; 961 962 for (i = 0; i < bootconfig.dramblocks; i++) { 963 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 964 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 965 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 966 PAGE_SIZE; 967 } 968 969 dmat = dma_tag_template; 970 971 dmat->_ranges = armadillo9_dma_ranges; 972 dmat->_nranges = bootconfig.dramblocks; 973 974 return dmat; 975 } 976
Indexes created Tue Sep 30 06:09:59 GMT 2025