armadillo9_machdep.c revision 1.9.22.1
1 /* armadillo9_machdep.c,v 1.9 2007/02/22 05:25:22 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, "armadillo9_machdep.c,v 1.9 2007/02/22 05:25:22 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 struct bootparam_tag *bootparam_p; 490 unsigned long devcfg; 491 492 /* 493 * Since we map the on-board devices VA==PA, and the kernel 494 * is running VA==PA, it's possible for us to initialize 495 * the console now. 496 */ 497 consinit(); 498 499 /* identify model */ 500 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 501 + EP93XX_APB_SYSCON 502 + EP93XX_SYSCON_DeviceCfg)); 503 for (armadillo_model = &armadillo_model_table[0]; 504 armadillo_model->devcfg; armadillo_model++) 505 if (devcfg == armadillo_model->devcfg) 506 break; 507 508 /* Talk to the user */ 509 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 510 511 /* set some informations from bootloader */ 512 bootparam_p = (struct bootparam_tag *)bootparam; 513 bootconfig.dramblocks = 0; 514 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 515 switch (bootparam_p->hdr.tag) { 516 case BOOTPARAM_TAG_MEM: 517 if (bootconfig.dramblocks < DRAM_BLOCKS) { 518 #ifdef VERBOSE_INIT_ARM 519 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 520 bootconfig.dramblocks, 521 bootparam_p->u.mem.start, 522 bootparam_p->u.mem.size); 523 #endif 524 bootconfig.dram[bootconfig.dramblocks].address = 525 bootparam_p->u.mem.start; 526 bootconfig.dram[bootconfig.dramblocks].pages = 527 bootparam_p->u.mem.size / PAGE_SIZE; 528 bootconfig.dramblocks++; 529 } 530 break; 531 case BOOTPARAM_TAG_CMDLINE: 532 #ifdef VERBOSE_INIT_ARM 533 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 534 #endif 535 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 536 break; 537 } 538 bootparam_p = bootparam_tag_next(bootparam_p); 539 } 540 541 /* 542 * Heads up ... Setup the CPU / MMU / TLB functions 543 */ 544 if (set_cpufuncs()) 545 panic("cpu not recognized!"); 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("initarm: Configuring system ...\n"); 549 #endif 550 /* 551 * Set up the variables that define the availablilty of 552 * physical memory. For now, we're going to set 553 * physical_freestart to 0xc0200000 (where the kernel 554 * was loaded), and allocate the memory we need downwards. 555 * If we get too close to the L1 table that we set up, we 556 * will panic. We will update physical_freestart and 557 * physical_freeend later to reflect what pmap_bootstrap() 558 * wants to see. 559 * 560 * XXX pmap_bootstrap() needs an enema. 561 */ 562 physical_start = bootconfig.dram[0].address; 563 physical_end = bootconfig.dram[0].address 564 + (bootconfig.dram[0].pages * PAGE_SIZE); 565 566 physical_freestart = 0xc0018000UL; 567 physical_freeend = 0xc0200000UL; 568 569 physmem = (physical_end - physical_start) / PAGE_SIZE; 570 571 #ifdef VERBOSE_INIT_ARM 572 /* Tell the user about the memory */ 573 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 574 physical_start, physical_end - 1); 575 #endif 576 577 /* 578 * Okay, the kernel starts 2MB in from the bottom of physical 579 * memory. We are going to allocate our bootstrap pages downwards 580 * from there. 581 * 582 * We need to allocate some fixed page tables to get the kernel 583 * going. We allocate one page directory and a number of page 584 * tables and store the physical addresses in the kernel_pt_table 585 * array. 586 * 587 * The kernel page directory must be on a 16K boundary. The page 588 * tables must be on 4K bounaries. What we do is allocate the 589 * page directory on the first 16K boundary that we encounter, and 590 * the page tables on 4K boundaries otherwise. Since we allocate 591 * at least 3 L2 page tables, we are guaranteed to encounter at 592 * least one 16K aligned region. 593 */ 594 595 #ifdef VERBOSE_INIT_ARM 596 printf("Allocating page tables\n"); 597 #endif 598 599 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 600 601 #ifdef VERBOSE_INIT_ARM 602 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 603 physical_freestart, free_pages, free_pages); 604 #endif 605 606 /* Define a macro to simplify memory allocation */ 607 #define valloc_pages(var, np) \ 608 alloc_pages((var).pv_pa, (np)); \ 609 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 610 611 #define alloc_pages(var, np) \ 612 physical_freeend -= ((np) * PAGE_SIZE); \ 613 if (physical_freeend < physical_freestart) \ 614 panic("initarm: out of memory"); \ 615 (var) = physical_freeend; \ 616 free_pages -= (np); \ 617 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 618 619 loop1 = 0; 620 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 621 /* Are we 16KB aligned for an L1 ? */ 622 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 623 && kernel_l1pt.pv_pa == 0) { 624 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 625 } else { 626 valloc_pages(kernel_pt_table[loop1], 627 L2_TABLE_SIZE / PAGE_SIZE); 628 ++loop1; 629 } 630 } 631 632 /* This should never be able to happen but better confirm that. */ 633 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 634 panic("initarm: Failed to align the kernel page directory"); 635 636 /* 637 * Allocate a page for the system vectors page 638 */ 639 alloc_pages(systempage.pv_pa, 1); 640 641 /* Allocate stacks for all modes */ 642 valloc_pages(irqstack, IRQ_STACK_SIZE); 643 valloc_pages(abtstack, ABT_STACK_SIZE); 644 valloc_pages(undstack, UND_STACK_SIZE); 645 valloc_pages(kernelstack, UPAGES); 646 647 #ifdef VERBOSE_INIT_ARM 648 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 649 irqstack.pv_va); 650 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 651 abtstack.pv_va); 652 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 653 undstack.pv_va); 654 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 655 kernelstack.pv_va); 656 #endif 657 658 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 659 660 /* 661 * Ok we have allocated physical pages for the primary kernel 662 * page tables. Save physical_freeend for when we give whats left 663 * of memory below 2Mbyte to UVM. 664 */ 665 666 physical_freeend_low = physical_freeend; 667 668 #ifdef VERBOSE_INIT_ARM 669 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 670 #endif 671 672 /* 673 * Now we start construction of the L1 page table 674 * We start by mapping the L2 page tables into the L1. 675 * This means that we can replace L1 mappings later on if necessary 676 */ 677 l1pagetable = kernel_l1pt.pv_pa; 678 679 /* Map the L2 pages tables in the L1 page table */ 680 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 681 &kernel_pt_table[KERNEL_PT_SYS]); 682 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 683 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 684 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 685 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 686 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 687 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 688 689 /* update the top of the kernel VM */ 690 pmap_curmaxkvaddr = 691 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 692 693 #ifdef VERBOSE_INIT_ARM 694 printf("Mapping kernel\n"); 695 #endif 696 697 /* Now we fill in the L2 pagetable for the kernel static code/data */ 698 { 699 extern char etext[], _end[]; 700 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 701 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 702 u_int logical; 703 704 textsize = (textsize + PGOFSET) & ~PGOFSET; 705 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 706 707 logical = 0x00200000; /* offset of kernel in RAM */ 708 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 709 physical_start + logical, textsize, 710 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 711 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 712 physical_start + logical, totalsize - textsize, 713 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 714 } 715 716 #ifdef VERBOSE_INIT_ARM 717 printf("Constructing L2 page tables\n"); 718 #endif 719 720 /* Map the stack pages */ 721 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 722 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 723 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 724 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 725 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 726 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 728 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 729 730 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 731 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 732 733 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 734 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 735 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 736 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 737 } 738 739 /* Map the vector page. */ 740 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 741 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 742 743 /* Map the statically mapped devices. */ 744 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 745 746 /* 747 * Update the physical_freestart/physical_freeend/free_pages 748 * variables. 749 */ 750 { 751 extern char _end[]; 752 753 physical_freestart = physical_start + 754 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 755 KERNEL_BASE); 756 physical_freeend = physical_end; 757 free_pages = 758 (physical_freeend - physical_freestart) / PAGE_SIZE; 759 } 760 761 /* 762 * Now we have the real page tables in place so we can switch to them. 763 * Once this is done we will be running with the REAL kernel page 764 * tables. 765 */ 766 767 /* Switch tables */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 770 physical_freestart, free_pages, free_pages); 771 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 772 #endif 773 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 774 setttb(kernel_l1pt.pv_pa); 775 cpu_tlb_flushID(); 776 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 777 778 /* 779 * Moved from cpu_startup() as data_abort_handler() references 780 * this during uvm init 781 */ 782 proc0paddr = (struct user *)kernelstack.pv_va; 783 lwp0.l_addr = proc0paddr; 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("done!\n"); 787 #endif 788 789 #ifdef VERBOSE_INIT_ARM 790 printf("bootstrap done.\n"); 791 #endif 792 793 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 794 795 /* 796 * Pages were allocated during the secondary bootstrap for the 797 * stacks for different CPU modes. 798 * We must now set the r13 registers in the different CPU modes to 799 * point to these stacks. 800 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 801 * of the stack memory. 802 */ 803 #ifdef VERBOSE_INIT_ARM 804 printf("init subsystems: stacks "); 805 #endif 806 807 set_stackptr(PSR_IRQ32_MODE, 808 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 809 set_stackptr(PSR_ABT32_MODE, 810 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 811 set_stackptr(PSR_UND32_MODE, 812 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 813 814 /* 815 * Well we should set a data abort handler. 816 * Once things get going this will change as we will need a proper 817 * handler. 818 * Until then we will use a handler that just panics but tells us 819 * why. 820 * Initialisation of the vectors will just panic on a data abort. 821 * This just fills in a slightly better one. 822 */ 823 #ifdef VERBOSE_INIT_ARM 824 printf("vectors "); 825 #endif 826 data_abort_handler_address = (u_int)data_abort_handler; 827 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 828 undefined_handler_address = (u_int)undefinedinstruction_bounce; 829 830 /* Initialise the undefined instruction handlers */ 831 #ifdef VERBOSE_INIT_ARM 832 printf("undefined "); 833 #endif 834 undefined_init(); 835 836 /* Load memory into UVM. */ 837 #ifdef VERBOSE_INIT_ARM 838 printf("page "); 839 #endif 840 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 841 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 842 atop(physical_freestart), atop(physical_freeend), 843 VM_FREELIST_DEFAULT); 844 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 845 atop(0xc0000000), atop(physical_freeend_low), 846 VM_FREELIST_DEFAULT); 847 physmem = bootconfig.dram[0].pages; 848 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 849 size_t start = bootconfig.dram[loop].address; 850 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 851 uvm_page_physload(atop(start), atop(start + size), 852 atop(start), atop(start + size), 853 VM_FREELIST_DEFAULT); 854 physmem += bootconfig.dram[loop].pages; 855 } 856 857 /* Boot strap pmap telling it where the kernel page table is */ 858 #ifdef VERBOSE_INIT_ARM 859 printf("pmap "); 860 #endif 861 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 862 863 /* Setup the IRQ system */ 864 #ifdef VERBOSE_INIT_ARM 865 printf("irq "); 866 #endif 867 ep93xx_intr_init(); 868 #if NISA > 0 869 isa_intr_init(); 870 871 #ifdef VERBOSE_INIT_ARM 872 printf("isa "); 873 #endif 874 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 875 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 876 #endif 877 878 #ifdef VERBOSE_INIT_ARM 879 printf("done.\n"); 880 #endif 881 882 #ifdef BOOTHOWTO 883 boothowto = BOOTHOWTO; 884 #endif 885 886 #ifdef IPKDB 887 /* Initialise ipkdb */ 888 ipkdb_init(); 889 if (boothowto & RB_KDB) 890 ipkdb_connect(0); 891 #endif 892 893 #if NKSYMS || defined(DDB) || defined(LKM) 894 /* Firmware doesn't load symbols. */ 895 ksyms_init(0, NULL, NULL); 896 #endif 897 898 #ifdef DDB 899 db_machine_init(); 900 if (boothowto & RB_KDB) 901 Debugger(); 902 #endif 903 904 /* We have our own device_register() */ 905 evbarm_device_register = armadillo9_device_register; 906 907 /* We return the new stack pointer address */ 908 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 909 } 910 911 void 912 consinit(void) 913 { 914 static int consinit_called; 915 #if NEPCOM > 0 916 bus_space_handle_t ioh; 917 #endif 918 919 if (consinit_called != 0) 920 return; 921 922 consinit_called = 1; 923 924 /* 925 * Console devices are already mapped in VA. Our devmap reflects 926 * this, so register it now so drivers can map the console 927 * device. 928 */ 929 pmap_devmap_register(armadillo9_devmap); 930 931 #if NEPCOM > 0 932 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 933 EP93XX_APB_UART_SIZE, 0, &ioh); 934 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 935 ioh, comcnspeed, comcnmode)) 936 { 937 panic("can't init serial console"); 938 } 939 #else 940 panic("serial console not configured"); 941 #endif 942 #if KGDB 943 #if NEPCOM > 0 944 if (strcmp(kgdb_devname, "epcom") == 0) { 945 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 946 kgdb_devmode); 947 } 948 #endif /* NEPCOM > 0 */ 949 #endif /* KGDB */ 950 } 951 952 953 bus_dma_tag_t 954 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 955 { 956 int i; 957 struct arm32_bus_dma_tag *dmat; 958 959 for (i = 0; i < bootconfig.dramblocks; i++) { 960 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 961 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 962 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 963 PAGE_SIZE; 964 } 965 966 dmat = dma_tag_template; 967 968 dmat->_ranges = armadillo9_dma_ranges; 969 dmat->_nranges = bootconfig.dramblocks; 970 971 return dmat; 972 } 973
Indexes created Wed Oct 22 13:09:56 GMT 2025