armadillo9_machdep.c revision 1.10
1 /* $NetBSD: armadillo9_machdep.c,v 1.10 2008/01/19 13:11:12 chris 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 1.10 2008/01/19 13:11:12 chris 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 "ksyms.h" 186 187 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 188 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 189 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 190 191 /* 192 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 193 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 194 */ 195 #define KERNEL_VM_SIZE 0x0c000000 196 197 /* 198 * Address to call from cpu_reset() to reset the machine. 199 * This is machine architecture dependant as it varies depending 200 * on where the ROM appears when you turn the MMU off. 201 */ 202 203 u_int cpu_reset_address = 0x80090000; 204 205 /* Define various stack sizes in pages */ 206 #define IRQ_STACK_SIZE 8 207 #define ABT_STACK_SIZE 8 208 #define UND_STACK_SIZE 8 209 210 BootConfig bootconfig; /* Boot config storage */ 211 char *boot_args = NULL; 212 char *boot_file = NULL; 213 214 vm_offset_t physical_start; 215 vm_offset_t physical_freestart; 216 vm_offset_t physical_freeend; 217 vm_offset_t physical_freeend_low; 218 vm_offset_t physical_end; 219 u_int free_pages; 220 int physmem = 0; 221 222 /* Physical and virtual addresses for some global pages */ 223 pv_addr_t systempage; 224 pv_addr_t irqstack; 225 pv_addr_t undstack; 226 pv_addr_t abtstack; 227 pv_addr_t kernelstack; 228 229 vm_offset_t msgbufphys; 230 231 static struct arm32_dma_range armadillo9_dma_ranges[4]; 232 233 #if NISA > 0 234 extern void isa_armadillo9_init(u_int, u_int); 235 #endif 236 237 extern u_int data_abort_handler_address; 238 extern u_int prefetch_abort_handler_address; 239 extern u_int undefined_handler_address; 240 241 #ifdef PMAP_DEBUG 242 extern int pmap_debug_level; 243 #endif 244 245 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 246 247 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 248 #define KERNEL_PT_KERNEL_NUM 4 249 /* L2 tables for mapping kernel VM */ 250 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 251 252 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 253 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 254 255 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 256 257 struct user *proc0paddr; 258 259 /* Prototypes */ 260 261 void consinit(void); 262 /* 263 * Define the default console speed for the machine. 264 */ 265 #if NEPCOM > 0 266 #ifndef CONSPEED 267 #define CONSPEED B115200 268 #endif /* ! CONSPEED */ 269 270 #ifndef CONMODE 271 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 272 #endif 273 274 #ifndef CONUNIT 275 #define CONUNIT 0 276 #endif 277 278 int comcnspeed = CONSPEED; 279 int comcnmode = CONMODE; 280 const unsigned long comaddr[] = { 281 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 282 #endif 283 284 #if KGDB 285 #ifndef KGDB_DEVNAME 286 #error Must define KGDB_DEVNAME 287 #endif 288 const char kgdb_devname[] = KGDB_DEVNAME; 289 290 #ifndef KGDB_DEVADDR 291 #error Must define KGDB_DEVADDR 292 #endif 293 unsigned long kgdb_devaddr = KGDB_DEVADDR; 294 295 #ifndef KGDB_DEVRATE 296 #define KGDB_DEVRATE CONSPEED 297 #endif 298 int kgdb_devrate = KGDB_DEVRATE; 299 300 #ifndef KGDB_DEVMODE 301 #define KGDB_DEVMODE CONMODE 302 #endif 303 int kgdb_devmode = KGDB_DEVMODE; 304 #endif /* KGDB */ 305 306 /* 307 * MAC address for the built-in Ethernet. 308 */ 309 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 310 311 static void 312 armadillo9_device_register(device_t dev, void *aux) 313 { 314 315 /* MAC address for the built-in Ethernet. */ 316 if (device_is_a(dev, "epe")) { 317 prop_data_t pd = prop_data_create_data_nocopy( 318 armadillo9_ethaddr, ETHER_ADDR_LEN); 319 KASSERT(pd != NULL); 320 if (prop_dictionary_set(device_properties(dev), 321 "mac-addr", pd) == false) { 322 printf("WARNING: unable to set mac-addr property " 323 "for %s\n", dev->dv_xname); 324 } 325 prop_object_release(pd); 326 } 327 } 328 329 /* 330 * void cpu_reboot(int howto, char *bootstr) 331 * 332 * Reboots the system 333 * 334 * Deal with any syncing, unmounting, dumping and shutdown hooks, 335 * then reset the CPU. 336 */ 337 void 338 cpu_reboot(int howto, char *bootstr) 339 { 340 /* 341 * If we are still cold then hit the air brakes 342 * and crash to earth fast 343 */ 344 if (cold) { 345 doshutdownhooks(); 346 printf("\r\n"); 347 printf("The operating system has halted.\r\n"); 348 printf("Please press any key to reboot.\r\n"); 349 cngetc(); 350 printf("\r\nrebooting...\r\n"); 351 goto reset; 352 } 353 354 /* Disable console buffering */ 355 356 /* 357 * If RB_NOSYNC was not specified sync the discs. 358 * Note: Unless cold is set to 1 here, syslogd will die during the 359 * unmount. It looks like syslogd is getting woken up only to find 360 * that it cannot page part of the binary in as the filesystem has 361 * been unmounted. 362 */ 363 if (!(howto & RB_NOSYNC)) 364 bootsync(); 365 366 /* Say NO to interrupts */ 367 splhigh(); 368 369 /* Do a dump if requested. */ 370 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 371 dumpsys(); 372 373 /* Run any shutdown hooks */ 374 doshutdownhooks(); 375 376 /* Make sure IRQ's are disabled */ 377 IRQdisable; 378 379 if (howto & RB_HALT) { 380 printf("\r\n"); 381 printf("The operating system has halted.\r\n"); 382 printf("Please press any key to reboot.\r\n"); 383 cngetc(); 384 } 385 386 printf("\r\nrebooting...\r\n"); 387 reset: 388 /* 389 * Make really really sure that all interrupts are disabled, 390 * and poke the Internal Bus and Peripheral Bus reset lines. 391 */ 392 (void) disable_interrupts(I32_bit|F32_bit); 393 #if NEPWDOG > 0 394 epwdog_reset(); 395 #else 396 { 397 u_int32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 398 u_int32_t val = EP93XX_WDOG_ENABLE; 399 __asm volatile ( 400 "str %1, [%0]\n" 401 : 402 : "r" (ctrl), "r" (val) 403 ); 404 } 405 #endif 406 for (;;); 407 } 408 409 /* Static device mappings. */ 410 static const struct pmap_devmap armadillo9_devmap[] = { 411 { 412 EP93XX_AHB_VBASE, 413 EP93XX_AHB_HWBASE, 414 EP93XX_AHB_SIZE, 415 VM_PROT_READ|VM_PROT_WRITE, 416 PTE_NOCACHE, 417 }, 418 419 { 420 EP93XX_APB_VBASE, 421 EP93XX_APB_HWBASE, 422 EP93XX_APB_SIZE, 423 VM_PROT_READ|VM_PROT_WRITE, 424 PTE_NOCACHE, 425 }, 426 427 { 428 EP93XX_PCMCIA0_VBASE, 429 EP93XX_PCMCIA0_HWBASE, 430 EP93XX_PCMCIA_SIZE, 431 VM_PROT_READ|VM_PROT_WRITE, 432 PTE_NOCACHE, 433 }, 434 435 /* 436 * IO8 and IO16 space *must* be mapped contiguously with 437 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 438 * on that! 439 */ 440 { 441 ARMADILLO9_IO8_VBASE, 442 ARMADILLO9_IO8_HWBASE, 443 ARMADILLO9_IO8_SIZE, 444 VM_PROT_READ|VM_PROT_WRITE, 445 PTE_NOCACHE, 446 }, 447 448 { 449 ARMADILLO9_IO16_VBASE, 450 ARMADILLO9_IO16_HWBASE, 451 ARMADILLO9_IO16_SIZE, 452 VM_PROT_READ|VM_PROT_WRITE, 453 PTE_NOCACHE, 454 }, 455 456 { 457 0, 458 0, 459 0, 460 0, 461 0, 462 } 463 }; 464 465 /* 466 * u_int initarm(...) 467 * 468 * Initial entry point on startup. This gets called before main() is 469 * entered. 470 * It should be responsible for setting up everything that must be 471 * in place when main is called. 472 * This includes 473 * Taking a copy of the boot configuration structure. 474 * Initialising the physical console so characters can be printed. 475 * Setting up page tables for the kernel 476 * Initialising interrupt controllers to a sane default state 477 */ 478 u_int 479 initarm(void *arg) 480 { 481 int loop; 482 int loop1; 483 u_int l1pagetable; 484 pv_addr_t kernel_l1pt; 485 struct bootparam_tag *bootparam_p; 486 unsigned long devcfg; 487 488 /* 489 * Since we map the on-board devices VA==PA, and the kernel 490 * is running VA==PA, it's possible for us to initialize 491 * the console now. 492 */ 493 consinit(); 494 495 /* identify model */ 496 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 497 + EP93XX_APB_SYSCON 498 + EP93XX_SYSCON_DeviceCfg)); 499 for (armadillo_model = &armadillo_model_table[0]; 500 armadillo_model->devcfg; armadillo_model++) 501 if (devcfg == armadillo_model->devcfg) 502 break; 503 504 /* Talk to the user */ 505 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 506 507 /* set some informations from bootloader */ 508 bootparam_p = (struct bootparam_tag *)bootparam; 509 bootconfig.dramblocks = 0; 510 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 511 switch (bootparam_p->hdr.tag) { 512 case BOOTPARAM_TAG_MEM: 513 if (bootconfig.dramblocks < DRAM_BLOCKS) { 514 #ifdef VERBOSE_INIT_ARM 515 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 516 bootconfig.dramblocks, 517 bootparam_p->u.mem.start, 518 bootparam_p->u.mem.size); 519 #endif 520 bootconfig.dram[bootconfig.dramblocks].address = 521 bootparam_p->u.mem.start; 522 bootconfig.dram[bootconfig.dramblocks].pages = 523 bootparam_p->u.mem.size / PAGE_SIZE; 524 bootconfig.dramblocks++; 525 } 526 break; 527 case BOOTPARAM_TAG_CMDLINE: 528 #ifdef VERBOSE_INIT_ARM 529 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 530 #endif 531 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 532 break; 533 } 534 bootparam_p = bootparam_tag_next(bootparam_p); 535 } 536 537 /* 538 * Heads up ... Setup the CPU / MMU / TLB functions 539 */ 540 if (set_cpufuncs()) 541 panic("cpu not recognized!"); 542 543 #ifdef VERBOSE_INIT_ARM 544 printf("initarm: Configuring system ...\n"); 545 #endif 546 /* 547 * Set up the variables that define the availablilty of 548 * physical memory. For now, we're going to set 549 * physical_freestart to 0xc0200000 (where the kernel 550 * was loaded), and allocate the memory we need downwards. 551 * If we get too close to the L1 table that we set up, we 552 * will panic. We will update physical_freestart and 553 * physical_freeend later to reflect what pmap_bootstrap() 554 * wants to see. 555 * 556 * XXX pmap_bootstrap() needs an enema. 557 */ 558 physical_start = bootconfig.dram[0].address; 559 physical_end = bootconfig.dram[0].address 560 + (bootconfig.dram[0].pages * PAGE_SIZE); 561 562 physical_freestart = 0xc0018000UL; 563 physical_freeend = 0xc0200000UL; 564 565 physmem = (physical_end - physical_start) / PAGE_SIZE; 566 567 #ifdef VERBOSE_INIT_ARM 568 /* Tell the user about the memory */ 569 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 570 physical_start, physical_end - 1); 571 #endif 572 573 /* 574 * Okay, the kernel starts 2MB in from the bottom of physical 575 * memory. We are going to allocate our bootstrap pages downwards 576 * from there. 577 * 578 * We need to allocate some fixed page tables to get the kernel 579 * going. We allocate one page directory and a number of page 580 * tables and store the physical addresses in the kernel_pt_table 581 * array. 582 * 583 * The kernel page directory must be on a 16K boundary. The page 584 * tables must be on 4K bounaries. What we do is allocate the 585 * page directory on the first 16K boundary that we encounter, and 586 * the page tables on 4K boundaries otherwise. Since we allocate 587 * at least 3 L2 page tables, we are guaranteed to encounter at 588 * least one 16K aligned region. 589 */ 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Allocating page tables\n"); 593 #endif 594 595 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 596 597 #ifdef VERBOSE_INIT_ARM 598 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 599 physical_freestart, free_pages, free_pages); 600 #endif 601 602 /* Define a macro to simplify memory allocation */ 603 #define valloc_pages(var, np) \ 604 alloc_pages((var).pv_pa, (np)); \ 605 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 606 607 #define alloc_pages(var, np) \ 608 physical_freeend -= ((np) * PAGE_SIZE); \ 609 if (physical_freeend < physical_freestart) \ 610 panic("initarm: out of memory"); \ 611 (var) = physical_freeend; \ 612 free_pages -= (np); \ 613 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 614 615 loop1 = 0; 616 kernel_l1pt.pv_pa = 0; 617 kernel_l1pt.pv_va = 0; 618 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 619 /* Are we 16KB aligned for an L1 ? */ 620 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 621 && kernel_l1pt.pv_pa == 0) { 622 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 623 } else { 624 valloc_pages(kernel_pt_table[loop1], 625 L2_TABLE_SIZE / PAGE_SIZE); 626 ++loop1; 627 } 628 } 629 630 /* This should never be able to happen but better confirm that. */ 631 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 632 panic("initarm: Failed to align the kernel page directory"); 633 634 /* 635 * Allocate a page for the system vectors page 636 */ 637 alloc_pages(systempage.pv_pa, 1); 638 639 /* Allocate stacks for all modes */ 640 valloc_pages(irqstack, IRQ_STACK_SIZE); 641 valloc_pages(abtstack, ABT_STACK_SIZE); 642 valloc_pages(undstack, UND_STACK_SIZE); 643 valloc_pages(kernelstack, UPAGES); 644 645 #ifdef VERBOSE_INIT_ARM 646 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 647 irqstack.pv_va); 648 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 649 abtstack.pv_va); 650 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 651 undstack.pv_va); 652 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 653 kernelstack.pv_va); 654 #endif 655 656 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 657 658 /* 659 * Ok we have allocated physical pages for the primary kernel 660 * page tables. Save physical_freeend for when we give whats left 661 * of memory below 2Mbyte to UVM. 662 */ 663 664 physical_freeend_low = physical_freeend; 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 668 #endif 669 670 /* 671 * Now we start construction of the L1 page table 672 * We start by mapping the L2 page tables into the L1. 673 * This means that we can replace L1 mappings later on if necessary 674 */ 675 l1pagetable = kernel_l1pt.pv_pa; 676 677 /* Map the L2 pages tables in the L1 page table */ 678 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 679 &kernel_pt_table[KERNEL_PT_SYS]); 680 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 681 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 682 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 683 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 684 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 685 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 686 687 /* update the top of the kernel VM */ 688 pmap_curmaxkvaddr = 689 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("Mapping kernel\n"); 693 #endif 694 695 /* Now we fill in the L2 pagetable for the kernel static code/data */ 696 { 697 extern char etext[], _end[]; 698 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 699 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 700 u_int logical; 701 702 textsize = (textsize + PGOFSET) & ~PGOFSET; 703 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 704 705 logical = 0x00200000; /* offset of kernel in RAM */ 706 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 707 physical_start + logical, textsize, 708 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 709 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 710 physical_start + logical, totalsize - textsize, 711 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 712 } 713 714 #ifdef VERBOSE_INIT_ARM 715 printf("Constructing L2 page tables\n"); 716 #endif 717 718 /* Map the stack pages */ 719 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 720 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 721 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 722 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 723 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 724 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 725 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 726 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 728 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 729 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 730 731 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 732 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 733 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 734 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 735 } 736 737 /* Map the vector page. */ 738 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 739 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 740 741 /* Map the statically mapped devices. */ 742 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 743 744 /* 745 * Update the physical_freestart/physical_freeend/free_pages 746 * variables. 747 */ 748 { 749 extern char _end[]; 750 751 physical_freestart = physical_start + 752 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 753 KERNEL_BASE); 754 physical_freeend = physical_end; 755 free_pages = 756 (physical_freeend - physical_freestart) / PAGE_SIZE; 757 } 758 759 /* 760 * Now we have the real page tables in place so we can switch to them. 761 * Once this is done we will be running with the REAL kernel page 762 * tables. 763 */ 764 765 /* Switch tables */ 766 #ifdef VERBOSE_INIT_ARM 767 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 768 physical_freestart, free_pages, free_pages); 769 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 770 #endif 771 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 772 setttb(kernel_l1pt.pv_pa); 773 cpu_tlb_flushID(); 774 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 775 776 /* 777 * Moved from cpu_startup() as data_abort_handler() references 778 * this during uvm init 779 */ 780 proc0paddr = (struct user *)kernelstack.pv_va; 781 lwp0.l_addr = proc0paddr; 782 783 #ifdef VERBOSE_INIT_ARM 784 printf("done!\n"); 785 #endif 786 787 #ifdef VERBOSE_INIT_ARM 788 printf("bootstrap done.\n"); 789 #endif 790 791 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 792 793 /* 794 * Pages were allocated during the secondary bootstrap for the 795 * stacks for different CPU modes. 796 * We must now set the r13 registers in the different CPU modes to 797 * point to these stacks. 798 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 799 * of the stack memory. 800 */ 801 #ifdef VERBOSE_INIT_ARM 802 printf("init subsystems: stacks "); 803 #endif 804 805 set_stackptr(PSR_IRQ32_MODE, 806 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 807 set_stackptr(PSR_ABT32_MODE, 808 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 809 set_stackptr(PSR_UND32_MODE, 810 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 811 812 /* 813 * Well we should set a data abort handler. 814 * Once things get going this will change as we will need a proper 815 * handler. 816 * Until then we will use a handler that just panics but tells us 817 * why. 818 * Initialisation of the vectors will just panic on a data abort. 819 * This just fills in a slightly better one. 820 */ 821 #ifdef VERBOSE_INIT_ARM 822 printf("vectors "); 823 #endif 824 data_abort_handler_address = (u_int)data_abort_handler; 825 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 826 undefined_handler_address = (u_int)undefinedinstruction_bounce; 827 828 /* Initialise the undefined instruction handlers */ 829 #ifdef VERBOSE_INIT_ARM 830 printf("undefined "); 831 #endif 832 undefined_init(); 833 834 /* Load memory into UVM. */ 835 #ifdef VERBOSE_INIT_ARM 836 printf("page "); 837 #endif 838 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 839 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 840 atop(physical_freestart), atop(physical_freeend), 841 VM_FREELIST_DEFAULT); 842 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 843 atop(0xc0000000), atop(physical_freeend_low), 844 VM_FREELIST_DEFAULT); 845 physmem = bootconfig.dram[0].pages; 846 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 847 size_t start = bootconfig.dram[loop].address; 848 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 849 uvm_page_physload(atop(start), atop(start + size), 850 atop(start), atop(start + size), 851 VM_FREELIST_DEFAULT); 852 physmem += bootconfig.dram[loop].pages; 853 } 854 855 /* Boot strap pmap telling it where the kernel page table is */ 856 #ifdef VERBOSE_INIT_ARM 857 printf("pmap "); 858 #endif 859 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 860 KERNEL_VM_BASE + KERNEL_VM_SIZE); 861 862 /* Setup the IRQ system */ 863 #ifdef VERBOSE_INIT_ARM 864 printf("irq "); 865 #endif 866 ep93xx_intr_init(); 867 #if NISA > 0 868 isa_intr_init(); 869 870 #ifdef VERBOSE_INIT_ARM 871 printf("isa "); 872 #endif 873 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 874 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 875 #endif 876 877 #ifdef VERBOSE_INIT_ARM 878 printf("done.\n"); 879 #endif 880 881 #ifdef BOOTHOWTO 882 boothowto = BOOTHOWTO; 883 #endif 884 885 #if NKSYMS || defined(DDB) || defined(LKM) 886 /* Firmware doesn't load symbols. */ 887 ksyms_init(0, NULL, NULL); 888 #endif 889 890 #ifdef DDB 891 db_machine_init(); 892 if (boothowto & RB_KDB) 893 Debugger(); 894 #endif 895 896 /* We have our own device_register() */ 897 evbarm_device_register = armadillo9_device_register; 898 899 /* We return the new stack pointer address */ 900 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 901 } 902 903 void 904 consinit(void) 905 { 906 static int consinit_called; 907 #if NEPCOM > 0 908 bus_space_handle_t ioh; 909 #endif 910 911 if (consinit_called != 0) 912 return; 913 914 consinit_called = 1; 915 916 /* 917 * Console devices are already mapped in VA. Our devmap reflects 918 * this, so register it now so drivers can map the console 919 * device. 920 */ 921 pmap_devmap_register(armadillo9_devmap); 922 923 #if NEPCOM > 0 924 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 925 EP93XX_APB_UART_SIZE, 0, &ioh); 926 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 927 ioh, comcnspeed, comcnmode)) 928 { 929 panic("can't init serial console"); 930 } 931 #else 932 panic("serial console not configured"); 933 #endif 934 #if KGDB 935 #if NEPCOM > 0 936 if (strcmp(kgdb_devname, "epcom") == 0) { 937 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 938 kgdb_devmode); 939 } 940 #endif /* NEPCOM > 0 */ 941 #endif /* KGDB */ 942 } 943 944 945 bus_dma_tag_t 946 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 947 { 948 int i; 949 struct arm32_bus_dma_tag *dmat; 950 951 for (i = 0; i < bootconfig.dramblocks; i++) { 952 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 953 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 954 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 955 PAGE_SIZE; 956 } 957 958 dmat = dma_tag_template; 959 960 dmat->_ranges = armadillo9_dma_ranges; 961 dmat->_nranges = bootconfig.dramblocks; 962 963 return dmat; 964 } 965
Indexes created Tue Oct 21 08:09:48 GMT 2025