armadillo9_machdep.c revision 1.20
1 /* $NetBSD: armadillo9_machdep.c,v 1.20 2011/06/30 20:09:22 wiz 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 dependent 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 1.20 2011/06/30 20:09:22 wiz 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 dependent 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; 220 221 /* Physical and virtual addresses for some global pages */ 222 pv_addr_t systempage; 223 pv_addr_t irqstack; 224 pv_addr_t undstack; 225 pv_addr_t abtstack; 226 pv_addr_t kernelstack; 227 228 vm_offset_t msgbufphys; 229 230 static struct arm32_dma_range armadillo9_dma_ranges[4]; 231 232 #if NISA > 0 233 extern void isa_armadillo9_init(u_int, u_int); 234 #endif 235 236 extern u_int data_abort_handler_address; 237 extern u_int prefetch_abort_handler_address; 238 extern u_int undefined_handler_address; 239 240 #ifdef PMAP_DEBUG 241 extern int pmap_debug_level; 242 #endif 243 244 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 245 246 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 247 #define KERNEL_PT_KERNEL_NUM 4 248 /* L2 tables for mapping kernel VM */ 249 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 250 251 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 252 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 253 254 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 255 256 /* Prototypes */ 257 258 void consinit(void); 259 /* 260 * Define the default console speed for the machine. 261 */ 262 #if NEPCOM > 0 263 #ifndef CONSPEED 264 #define CONSPEED B115200 265 #endif /* ! CONSPEED */ 266 267 #ifndef CONMODE 268 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 269 #endif 270 271 #ifndef CONUNIT 272 #define CONUNIT 0 273 #endif 274 275 int comcnspeed = CONSPEED; 276 int comcnmode = CONMODE; 277 const unsigned long comaddr[] = { 278 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 279 #endif 280 281 #if KGDB 282 #ifndef KGDB_DEVNAME 283 #error Must define KGDB_DEVNAME 284 #endif 285 const char kgdb_devname[] = KGDB_DEVNAME; 286 287 #ifndef KGDB_DEVADDR 288 #error Must define KGDB_DEVADDR 289 #endif 290 unsigned long kgdb_devaddr = KGDB_DEVADDR; 291 292 #ifndef KGDB_DEVRATE 293 #define KGDB_DEVRATE CONSPEED 294 #endif 295 int kgdb_devrate = KGDB_DEVRATE; 296 297 #ifndef KGDB_DEVMODE 298 #define KGDB_DEVMODE CONMODE 299 #endif 300 int kgdb_devmode = KGDB_DEVMODE; 301 #endif /* KGDB */ 302 303 /* 304 * MAC address for the built-in Ethernet. 305 */ 306 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 307 308 static void 309 armadillo9_device_register(device_t dev, void *aux) 310 { 311 312 /* MAC address for the built-in Ethernet. */ 313 if (device_is_a(dev, "epe")) { 314 prop_data_t pd = prop_data_create_data_nocopy( 315 armadillo9_ethaddr, ETHER_ADDR_LEN); 316 KASSERT(pd != NULL); 317 if (prop_dictionary_set(device_properties(dev), 318 "mac-address", pd) == false) { 319 printf("WARNING: unable to set mac-addr property " 320 "for %s\n", dev->dv_xname); 321 } 322 prop_object_release(pd); 323 } 324 } 325 326 /* 327 * void cpu_reboot(int howto, char *bootstr) 328 * 329 * Reboots the system 330 * 331 * Deal with any syncing, unmounting, dumping and shutdown hooks, 332 * then reset the CPU. 333 */ 334 void 335 cpu_reboot(int howto, char *bootstr) 336 { 337 /* 338 * If we are still cold then hit the air brakes 339 * and crash to earth fast 340 */ 341 if (cold) { 342 doshutdownhooks(); 343 pmf_system_shutdown(boothowto); 344 printf("\r\n"); 345 printf("The operating system has halted.\r\n"); 346 printf("Please press any key to reboot.\r\n"); 347 cngetc(); 348 printf("\r\nrebooting...\r\n"); 349 goto reset; 350 } 351 352 /* Disable console buffering */ 353 354 /* 355 * If RB_NOSYNC was not specified sync the discs. 356 * Note: Unless cold is set to 1 here, syslogd will die during the 357 * unmount. It looks like syslogd is getting woken up only to find 358 * that it cannot page part of the binary in as the filesystem has 359 * been unmounted. 360 */ 361 if (!(howto & RB_NOSYNC)) 362 bootsync(); 363 364 /* Say NO to interrupts */ 365 splhigh(); 366 367 /* Do a dump if requested. */ 368 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 369 dumpsys(); 370 371 /* Run any shutdown hooks */ 372 doshutdownhooks(); 373 374 pmf_system_shutdown(boothowto); 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 struct bootparam_tag *bootparam_p; 485 unsigned long devcfg; 486 487 /* 488 * Since we map the on-board devices VA==PA, and the kernel 489 * is running VA==PA, it's possible for us to initialize 490 * the console now. 491 */ 492 consinit(); 493 494 /* identify model */ 495 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 496 + EP93XX_APB_SYSCON 497 + EP93XX_SYSCON_DeviceCfg)); 498 for (armadillo_model = &armadillo_model_table[0]; 499 armadillo_model->devcfg; armadillo_model++) 500 if (devcfg == armadillo_model->devcfg) 501 break; 502 503 /* Talk to the user */ 504 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 505 506 /* set some informations from bootloader */ 507 bootparam_p = (struct bootparam_tag *)bootparam; 508 bootconfig.dramblocks = 0; 509 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 510 switch (bootparam_p->hdr.tag) { 511 case BOOTPARAM_TAG_MEM: 512 if (bootconfig.dramblocks < DRAM_BLOCKS) { 513 #ifdef VERBOSE_INIT_ARM 514 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 515 bootconfig.dramblocks, 516 bootparam_p->u.mem.start, 517 bootparam_p->u.mem.size); 518 #endif 519 bootconfig.dram[bootconfig.dramblocks].address = 520 bootparam_p->u.mem.start; 521 bootconfig.dram[bootconfig.dramblocks].pages = 522 bootparam_p->u.mem.size / PAGE_SIZE; 523 bootconfig.dramblocks++; 524 } 525 break; 526 case BOOTPARAM_TAG_CMDLINE: 527 #ifdef VERBOSE_INIT_ARM 528 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 529 #endif 530 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 531 break; 532 } 533 bootparam_p = bootparam_tag_next(bootparam_p); 534 } 535 536 /* 537 * Heads up ... Setup the CPU / MMU / TLB functions 538 */ 539 if (set_cpufuncs()) 540 panic("cpu not recognized!"); 541 542 #ifdef VERBOSE_INIT_ARM 543 printf("initarm: Configuring system ...\n"); 544 #endif 545 /* 546 * Set up the variables that define the availablilty of 547 * physical memory. For now, we're going to set 548 * physical_freestart to 0xc0200000 (where the kernel 549 * was loaded), and allocate the memory we need downwards. 550 * If we get too close to the L1 table that we set up, we 551 * will panic. We will update physical_freestart and 552 * physical_freeend later to reflect what pmap_bootstrap() 553 * wants to see. 554 * 555 * XXX pmap_bootstrap() needs an enema. 556 */ 557 physical_start = bootconfig.dram[0].address; 558 physical_end = bootconfig.dram[0].address 559 + (bootconfig.dram[0].pages * PAGE_SIZE); 560 561 physical_freestart = 0xc0018000UL; 562 physical_freeend = 0xc0200000UL; 563 564 physmem = (physical_end - physical_start) / PAGE_SIZE; 565 566 #ifdef VERBOSE_INIT_ARM 567 /* Tell the user about the memory */ 568 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 569 physical_start, physical_end - 1); 570 #endif 571 572 /* 573 * Okay, the kernel starts 2MB in from the bottom of physical 574 * memory. We are going to allocate our bootstrap pages downwards 575 * from there. 576 * 577 * We need to allocate some fixed page tables to get the kernel 578 * going. We allocate one page directory and a number of page 579 * tables and store the physical addresses in the kernel_pt_table 580 * array. 581 * 582 * The kernel page directory must be on a 16K boundary. The page 583 * tables must be on 4K bounaries. What we do is allocate the 584 * page directory on the first 16K boundary that we encounter, and 585 * the page tables on 4K boundaries otherwise. Since we allocate 586 * at least 3 L2 page tables, we are guaranteed to encounter at 587 * least one 16K aligned region. 588 */ 589 590 #ifdef VERBOSE_INIT_ARM 591 printf("Allocating page tables\n"); 592 #endif 593 594 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 598 physical_freestart, free_pages, free_pages); 599 #endif 600 601 /* Define a macro to simplify memory allocation */ 602 #define valloc_pages(var, np) \ 603 alloc_pages((var).pv_pa, (np)); \ 604 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 605 606 #define alloc_pages(var, np) \ 607 physical_freeend -= ((np) * PAGE_SIZE); \ 608 if (physical_freeend < physical_freestart) \ 609 panic("initarm: out of memory"); \ 610 (var) = physical_freeend; \ 611 free_pages -= (np); \ 612 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 613 614 loop1 = 0; 615 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 616 /* Are we 16KB aligned for an L1 ? */ 617 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 618 && kernel_l1pt.pv_pa == 0) { 619 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 620 } else { 621 valloc_pages(kernel_pt_table[loop1], 622 L2_TABLE_SIZE / PAGE_SIZE); 623 ++loop1; 624 } 625 } 626 627 /* This should never be able to happen but better confirm that. */ 628 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 629 panic("initarm: Failed to align the kernel page directory"); 630 631 /* 632 * Allocate a page for the system vectors page 633 */ 634 alloc_pages(systempage.pv_pa, 1); 635 636 /* Allocate stacks for all modes */ 637 valloc_pages(irqstack, IRQ_STACK_SIZE); 638 valloc_pages(abtstack, ABT_STACK_SIZE); 639 valloc_pages(undstack, UND_STACK_SIZE); 640 valloc_pages(kernelstack, UPAGES); 641 642 #ifdef VERBOSE_INIT_ARM 643 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 644 irqstack.pv_va); 645 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 646 abtstack.pv_va); 647 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 648 undstack.pv_va); 649 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 650 kernelstack.pv_va); 651 #endif 652 653 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 654 655 /* 656 * Ok we have allocated physical pages for the primary kernel 657 * page tables. Save physical_freeend for when we give whats left 658 * of memory below 2Mbyte to UVM. 659 */ 660 661 physical_freeend_low = physical_freeend; 662 663 #ifdef VERBOSE_INIT_ARM 664 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 665 #endif 666 667 /* 668 * Now we start construction of the L1 page table 669 * We start by mapping the L2 page tables into the L1. 670 * This means that we can replace L1 mappings later on if necessary 671 */ 672 l1pagetable = kernel_l1pt.pv_pa; 673 674 /* Map the L2 pages tables in the L1 page table */ 675 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 676 &kernel_pt_table[KERNEL_PT_SYS]); 677 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 678 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 679 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 680 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 681 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 682 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 683 684 /* update the top of the kernel VM */ 685 pmap_curmaxkvaddr = 686 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 687 688 #ifdef VERBOSE_INIT_ARM 689 printf("Mapping kernel\n"); 690 #endif 691 692 /* Now we fill in the L2 pagetable for the kernel static code/data */ 693 { 694 extern char etext[], _end[]; 695 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 696 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 697 u_int logical; 698 699 textsize = (textsize + PGOFSET) & ~PGOFSET; 700 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 701 702 logical = 0x00200000; /* offset of kernel in RAM */ 703 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 704 physical_start + logical, textsize, 705 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 706 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 707 physical_start + logical, totalsize - textsize, 708 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 709 } 710 711 #ifdef VERBOSE_INIT_ARM 712 printf("Constructing L2 page tables\n"); 713 #endif 714 715 /* Map the stack pages */ 716 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 717 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 718 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 719 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 720 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 721 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 722 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 723 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 724 725 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 726 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 727 728 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 729 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 730 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 731 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 732 } 733 734 /* Map the vector page. */ 735 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 736 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 737 738 /* Map the statically mapped devices. */ 739 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 740 741 /* 742 * Update the physical_freestart/physical_freeend/free_pages 743 * variables. 744 */ 745 { 746 extern char _end[]; 747 748 physical_freestart = physical_start + 749 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 750 KERNEL_BASE); 751 physical_freeend = physical_end; 752 free_pages = 753 (physical_freeend - physical_freestart) / PAGE_SIZE; 754 } 755 756 /* 757 * Now we have the real page tables in place so we can switch to them. 758 * Once this is done we will be running with the REAL kernel page 759 * tables. 760 */ 761 762 /* Switch tables */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 765 physical_freestart, free_pages, free_pages); 766 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 767 #endif 768 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 769 cpu_setttb(kernel_l1pt.pv_pa); 770 cpu_tlb_flushID(); 771 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 772 773 /* 774 * Moved from cpu_startup() as data_abort_handler() references 775 * this during uvm init 776 */ 777 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 778 779 #ifdef VERBOSE_INIT_ARM 780 printf("done!\n"); 781 #endif 782 783 #ifdef VERBOSE_INIT_ARM 784 printf("bootstrap done.\n"); 785 #endif 786 787 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 788 789 /* 790 * Pages were allocated during the secondary bootstrap for the 791 * stacks for different CPU modes. 792 * We must now set the r13 registers in the different CPU modes to 793 * point to these stacks. 794 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 795 * of the stack memory. 796 */ 797 #ifdef VERBOSE_INIT_ARM 798 printf("init subsystems: stacks "); 799 #endif 800 801 set_stackptr(PSR_IRQ32_MODE, 802 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 803 set_stackptr(PSR_ABT32_MODE, 804 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 805 set_stackptr(PSR_UND32_MODE, 806 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 807 808 /* 809 * Well we should set a data abort handler. 810 * Once things get going this will change as we will need a proper 811 * handler. 812 * Until then we will use a handler that just panics but tells us 813 * why. 814 * Initialisation of the vectors will just panic on a data abort. 815 * This just fills in a slightly better one. 816 */ 817 #ifdef VERBOSE_INIT_ARM 818 printf("vectors "); 819 #endif 820 data_abort_handler_address = (u_int)data_abort_handler; 821 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 822 undefined_handler_address = (u_int)undefinedinstruction_bounce; 823 824 /* Initialise the undefined instruction handlers */ 825 #ifdef VERBOSE_INIT_ARM 826 printf("undefined "); 827 #endif 828 undefined_init(); 829 830 /* Load memory into UVM. */ 831 #ifdef VERBOSE_INIT_ARM 832 printf("page "); 833 #endif 834 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 835 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 836 atop(physical_freestart), atop(physical_freeend), 837 VM_FREELIST_DEFAULT); 838 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 839 atop(0xc0000000), atop(physical_freeend_low), 840 VM_FREELIST_DEFAULT); 841 physmem = bootconfig.dram[0].pages; 842 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 843 size_t start = bootconfig.dram[loop].address; 844 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 845 uvm_page_physload(atop(start), atop(start + size), 846 atop(start), atop(start + size), 847 VM_FREELIST_DEFAULT); 848 physmem += bootconfig.dram[loop].pages; 849 } 850 851 /* Boot strap pmap telling it where the kernel page table is */ 852 #ifdef VERBOSE_INIT_ARM 853 printf("pmap "); 854 #endif 855 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 856 857 /* Setup the IRQ system */ 858 #ifdef VERBOSE_INIT_ARM 859 printf("irq "); 860 #endif 861 ep93xx_intr_init(); 862 #if NISA > 0 863 isa_intr_init(); 864 865 #ifdef VERBOSE_INIT_ARM 866 printf("isa "); 867 #endif 868 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 869 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 870 #endif 871 872 #ifdef VERBOSE_INIT_ARM 873 printf("done.\n"); 874 #endif 875 876 #ifdef BOOTHOWTO 877 boothowto = BOOTHOWTO; 878 #endif 879 880 #ifdef DDB 881 db_machine_init(); 882 if (boothowto & RB_KDB) 883 Debugger(); 884 #endif 885 886 /* We have our own device_register() */ 887 evbarm_device_register = armadillo9_device_register; 888 889 /* We return the new stack pointer address */ 890 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 891 } 892 893 void 894 consinit(void) 895 { 896 static int consinit_called; 897 #if NEPCOM > 0 898 bus_space_handle_t ioh; 899 #endif 900 901 if (consinit_called != 0) 902 return; 903 904 consinit_called = 1; 905 906 /* 907 * Console devices are already mapped in VA. Our devmap reflects 908 * this, so register it now so drivers can map the console 909 * device. 910 */ 911 pmap_devmap_register(armadillo9_devmap); 912 913 #if NEPCOM > 0 914 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 915 EP93XX_APB_UART_SIZE, 0, &ioh); 916 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 917 ioh, comcnspeed, comcnmode)) 918 { 919 panic("can't init serial console"); 920 } 921 #else 922 panic("serial console not configured"); 923 #endif 924 #if KGDB 925 #if NEPCOM > 0 926 if (strcmp(kgdb_devname, "epcom") == 0) { 927 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 928 kgdb_devmode); 929 } 930 #endif /* NEPCOM > 0 */ 931 #endif /* KGDB */ 932 } 933 934 935 bus_dma_tag_t 936 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 937 { 938 int i; 939 struct arm32_bus_dma_tag *dmat; 940 941 for (i = 0; i < bootconfig.dramblocks; i++) { 942 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 943 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 944 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 945 PAGE_SIZE; 946 } 947 948 dmat = dma_tag_template; 949 950 dmat->_ranges = armadillo9_dma_ranges; 951 dmat->_nranges = bootconfig.dramblocks; 952 953 return dmat; 954 } 955
Indexes created Tue Sep 30 11:09:46 GMT 2025