armadillo9_machdep.c revision 1.24
1 /* $NetBSD: armadillo9_machdep.c,v 1.24 2012/09/22 00:33:38 matt 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 1.24 2012/09/22 00:33:38 matt 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 <sys/bus.h> 145 #include <machine/cpu.h> 146 #include <machine/frame.h> 147 #include <arm/undefined.h> 148 149 /* Define various stack sizes in pages */ 150 #define IRQ_STACK_SIZE 8 151 #define ABT_STACK_SIZE 8 152 #define UND_STACK_SIZE 8 153 154 #include <arm/arm32/machdep.h> 155 156 #include <arm/ep93xx/ep93xxreg.h> 157 #include <arm/ep93xx/ep93xxvar.h> 158 159 #include "epwdog.h" 160 #if NEPWDOG > 0 161 #include <arm/ep93xx/epwdogvar.h> 162 #endif 163 #include <arm/ep93xx/epwdogreg.h> 164 165 #include <dev/ic/comreg.h> 166 #include <dev/ic/comvar.h> 167 168 #include "epcom.h" 169 #if NEPCOM > 0 170 #include <arm/ep93xx/epcomvar.h> 171 #endif 172 173 #include "isa.h" 174 #if NISA > 0 175 #include <dev/isa/isareg.h> 176 #include <dev/isa/isavar.h> 177 #endif 178 179 #include <machine/isa_machdep.h> 180 181 #include <evbarm/armadillo/armadillo9reg.h> 182 #include <evbarm/armadillo/armadillo9var.h> 183 184 struct armadillo_model_t *armadillo_model = 0; 185 static struct armadillo_model_t armadillo_model_table[] = { 186 { DEVCFG_ARMADILLO9, "Armadillo-9" }, 187 { DEVCFG_ARMADILLO210, "Armadillo-210" }, 188 { 0, "Armadillo(unknown model)" } }; 189 190 #include "ksyms.h" 191 192 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 193 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 194 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 195 196 /* 197 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 198 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 199 */ 200 #define KERNEL_VM_SIZE 0x0c000000 201 202 203 BootConfig bootconfig; /* Boot config storage */ 204 char *boot_args = NULL; 205 char *boot_file = NULL; 206 207 vm_offset_t physical_start; 208 vm_offset_t physical_freestart; 209 vm_offset_t physical_freeend; 210 vm_offset_t physical_freeend_low; 211 vm_offset_t physical_end; 212 u_int free_pages; 213 214 vm_offset_t msgbufphys; 215 216 static struct arm32_dma_range armadillo9_dma_ranges[4]; 217 218 #if NISA > 0 219 extern void isa_armadillo9_init(u_int, u_int); 220 #endif 221 222 #ifdef PMAP_DEBUG 223 extern int pmap_debug_level; 224 #endif 225 226 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 227 228 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 229 #define KERNEL_PT_KERNEL_NUM 4 230 /* L2 tables for mapping kernel VM */ 231 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 232 233 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 234 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 235 236 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 237 238 /* Prototypes */ 239 240 void consinit(void); 241 /* 242 * Define the default console speed for the machine. 243 */ 244 #if NEPCOM > 0 245 #ifndef CONSPEED 246 #define CONSPEED B115200 247 #endif /* ! CONSPEED */ 248 249 #ifndef CONMODE 250 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 251 #endif 252 253 #ifndef CONUNIT 254 #define CONUNIT 0 255 #endif 256 257 int comcnspeed = CONSPEED; 258 int comcnmode = CONMODE; 259 const unsigned long comaddr[] = { 260 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 261 #endif 262 263 #if KGDB 264 #ifndef KGDB_DEVNAME 265 #error Must define KGDB_DEVNAME 266 #endif 267 const char kgdb_devname[] = KGDB_DEVNAME; 268 269 #ifndef KGDB_DEVADDR 270 #error Must define KGDB_DEVADDR 271 #endif 272 unsigned long kgdb_devaddr = KGDB_DEVADDR; 273 274 #ifndef KGDB_DEVRATE 275 #define KGDB_DEVRATE CONSPEED 276 #endif 277 int kgdb_devrate = KGDB_DEVRATE; 278 279 #ifndef KGDB_DEVMODE 280 #define KGDB_DEVMODE CONMODE 281 #endif 282 int kgdb_devmode = KGDB_DEVMODE; 283 #endif /* KGDB */ 284 285 /* 286 * MAC address for the built-in Ethernet. 287 */ 288 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 289 290 static void 291 armadillo9_device_register(device_t dev, void *aux) 292 { 293 294 /* MAC address for the built-in Ethernet. */ 295 if (device_is_a(dev, "epe")) { 296 prop_data_t pd = prop_data_create_data_nocopy( 297 armadillo9_ethaddr, ETHER_ADDR_LEN); 298 KASSERT(pd != NULL); 299 if (prop_dictionary_set(device_properties(dev), 300 "mac-address", pd) == false) { 301 printf("WARNING: unable to set mac-addr property " 302 "for %s\n", dev->dv_xname); 303 } 304 prop_object_release(pd); 305 } 306 } 307 308 /* 309 * void cpu_reboot(int howto, char *bootstr) 310 * 311 * Reboots the system 312 * 313 * Deal with any syncing, unmounting, dumping and shutdown hooks, 314 * then reset the CPU. 315 */ 316 void 317 cpu_reboot(int howto, char *bootstr) 318 { 319 /* 320 * If we are still cold then hit the air brakes 321 * and crash to earth fast 322 */ 323 if (cold) { 324 doshutdownhooks(); 325 pmf_system_shutdown(boothowto); 326 printf("\r\n"); 327 printf("The operating system has halted.\r\n"); 328 printf("Please press any key to reboot.\r\n"); 329 cngetc(); 330 printf("\r\nrebooting...\r\n"); 331 goto reset; 332 } 333 334 /* Disable console buffering */ 335 336 /* 337 * If RB_NOSYNC was not specified sync the discs. 338 * Note: Unless cold is set to 1 here, syslogd will die during the 339 * unmount. It looks like syslogd is getting woken up only to find 340 * that it cannot page part of the binary in as the filesystem has 341 * been unmounted. 342 */ 343 if (!(howto & RB_NOSYNC)) 344 bootsync(); 345 346 /* Say NO to interrupts */ 347 splhigh(); 348 349 /* Do a dump if requested. */ 350 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 351 dumpsys(); 352 353 /* Run any shutdown hooks */ 354 doshutdownhooks(); 355 356 pmf_system_shutdown(boothowto); 357 358 /* Make sure IRQ's are disabled */ 359 IRQdisable; 360 361 if (howto & RB_HALT) { 362 printf("\r\n"); 363 printf("The operating system has halted.\r\n"); 364 printf("Please press any key to reboot.\r\n"); 365 cngetc(); 366 } 367 368 printf("\r\nrebooting...\r\n"); 369 reset: 370 /* 371 * Make really really sure that all interrupts are disabled, 372 * and poke the Internal Bus and Peripheral Bus reset lines. 373 */ 374 (void) disable_interrupts(I32_bit|F32_bit); 375 #if NEPWDOG > 0 376 epwdog_reset(); 377 #else 378 { 379 u_int32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 380 u_int32_t val = EP93XX_WDOG_ENABLE; 381 __asm volatile ( 382 "str %1, [%0]\n" 383 : 384 : "r" (ctrl), "r" (val) 385 ); 386 } 387 #endif 388 for (;;); 389 } 390 391 /* Static device mappings. */ 392 static const struct pmap_devmap armadillo9_devmap[] = { 393 { 394 EP93XX_AHB_VBASE, 395 EP93XX_AHB_HWBASE, 396 EP93XX_AHB_SIZE, 397 VM_PROT_READ|VM_PROT_WRITE, 398 PTE_NOCACHE, 399 }, 400 401 { 402 EP93XX_APB_VBASE, 403 EP93XX_APB_HWBASE, 404 EP93XX_APB_SIZE, 405 VM_PROT_READ|VM_PROT_WRITE, 406 PTE_NOCACHE, 407 }, 408 409 { 410 EP93XX_PCMCIA0_VBASE, 411 EP93XX_PCMCIA0_HWBASE, 412 EP93XX_PCMCIA_SIZE, 413 VM_PROT_READ|VM_PROT_WRITE, 414 PTE_NOCACHE, 415 }, 416 417 /* 418 * IO8 and IO16 space *must* be mapped contiguously with 419 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 420 * on that! 421 */ 422 { 423 ARMADILLO9_IO8_VBASE, 424 ARMADILLO9_IO8_HWBASE, 425 ARMADILLO9_IO8_SIZE, 426 VM_PROT_READ|VM_PROT_WRITE, 427 PTE_NOCACHE, 428 }, 429 430 { 431 ARMADILLO9_IO16_VBASE, 432 ARMADILLO9_IO16_HWBASE, 433 ARMADILLO9_IO16_SIZE, 434 VM_PROT_READ|VM_PROT_WRITE, 435 PTE_NOCACHE, 436 }, 437 438 { 439 0, 440 0, 441 0, 442 0, 443 0, 444 } 445 }; 446 447 /* 448 * u_int initarm(...) 449 * 450 * Initial entry point on startup. This gets called before main() is 451 * entered. 452 * It should be responsible for setting up everything that must be 453 * in place when main is called. 454 * This includes 455 * Taking a copy of the boot configuration structure. 456 * Initialising the physical console so characters can be printed. 457 * Setting up page tables for the kernel 458 * Initialising interrupt controllers to a sane default state 459 */ 460 u_int 461 initarm(void *arg) 462 { 463 int loop; 464 int loop1; 465 u_int l1pagetable; 466 struct bootparam_tag *bootparam_p; 467 unsigned long devcfg; 468 469 /* 470 * Since we map the on-board devices VA==PA, and the kernel 471 * is running VA==PA, it's possible for us to initialize 472 * the console now. 473 */ 474 consinit(); 475 476 /* identify model */ 477 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 478 + EP93XX_APB_SYSCON 479 + EP93XX_SYSCON_DeviceCfg)); 480 for (armadillo_model = &armadillo_model_table[0]; 481 armadillo_model->devcfg; armadillo_model++) 482 if (devcfg == armadillo_model->devcfg) 483 break; 484 485 /* Talk to the user */ 486 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 487 488 /* set some informations from bootloader */ 489 bootparam_p = (struct bootparam_tag *)bootparam; 490 bootconfig.dramblocks = 0; 491 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 492 switch (bootparam_p->hdr.tag) { 493 case BOOTPARAM_TAG_MEM: 494 if (bootconfig.dramblocks < DRAM_BLOCKS) { 495 #ifdef VERBOSE_INIT_ARM 496 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 497 bootconfig.dramblocks, 498 bootparam_p->u.mem.start, 499 bootparam_p->u.mem.size); 500 #endif 501 bootconfig.dram[bootconfig.dramblocks].address = 502 bootparam_p->u.mem.start; 503 bootconfig.dram[bootconfig.dramblocks].pages = 504 bootparam_p->u.mem.size / PAGE_SIZE; 505 bootconfig.dramblocks++; 506 } 507 break; 508 case BOOTPARAM_TAG_CMDLINE: 509 #ifdef VERBOSE_INIT_ARM 510 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 511 #endif 512 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 513 break; 514 } 515 bootparam_p = bootparam_tag_next(bootparam_p); 516 } 517 518 /* 519 * Heads up ... Setup the CPU / MMU / TLB functions 520 */ 521 if (set_cpufuncs()) 522 panic("cpu not recognized!"); 523 524 #ifdef VERBOSE_INIT_ARM 525 printf("initarm: Configuring system ...\n"); 526 #endif 527 /* 528 * Set up the variables that define the availablilty of 529 * physical memory. For now, we're going to set 530 * physical_freestart to 0xc0200000 (where the kernel 531 * was loaded), and allocate the memory we need downwards. 532 * If we get too close to the L1 table that we set up, we 533 * will panic. We will update physical_freestart and 534 * physical_freeend later to reflect what pmap_bootstrap() 535 * wants to see. 536 * 537 * XXX pmap_bootstrap() needs an enema. 538 */ 539 physical_start = bootconfig.dram[0].address; 540 physical_end = bootconfig.dram[0].address 541 + (bootconfig.dram[0].pages * PAGE_SIZE); 542 543 physical_freestart = 0xc0018000UL; 544 physical_freeend = 0xc0200000UL; 545 546 physmem = (physical_end - physical_start) / PAGE_SIZE; 547 548 #ifdef VERBOSE_INIT_ARM 549 /* Tell the user about the memory */ 550 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 551 physical_start, physical_end - 1); 552 #endif 553 554 /* 555 * Okay, the kernel starts 2MB in from the bottom of physical 556 * memory. We are going to allocate our bootstrap pages downwards 557 * from there. 558 * 559 * We need to allocate some fixed page tables to get the kernel 560 * going. We allocate one page directory and a number of page 561 * tables and store the physical addresses in the kernel_pt_table 562 * array. 563 * 564 * The kernel page directory must be on a 16K boundary. The page 565 * tables must be on 4K bounaries. What we do is allocate the 566 * page directory on the first 16K boundary that we encounter, and 567 * the page tables on 4K boundaries otherwise. Since we allocate 568 * at least 3 L2 page tables, we are guaranteed to encounter at 569 * least one 16K aligned region. 570 */ 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("Allocating page tables\n"); 574 #endif 575 576 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 577 578 #ifdef VERBOSE_INIT_ARM 579 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 580 physical_freestart, free_pages, free_pages); 581 #endif 582 583 /* Define a macro to simplify memory allocation */ 584 #define valloc_pages(var, np) \ 585 alloc_pages((var).pv_pa, (np)); \ 586 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 587 588 #define alloc_pages(var, np) \ 589 physical_freeend -= ((np) * PAGE_SIZE); \ 590 if (physical_freeend < physical_freestart) \ 591 panic("initarm: out of memory"); \ 592 (var) = physical_freeend; \ 593 free_pages -= (np); \ 594 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 595 596 loop1 = 0; 597 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 598 /* Are we 16KB aligned for an L1 ? */ 599 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 600 && kernel_l1pt.pv_pa == 0) { 601 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 602 } else { 603 valloc_pages(kernel_pt_table[loop1], 604 L2_TABLE_SIZE / PAGE_SIZE); 605 ++loop1; 606 } 607 } 608 609 /* This should never be able to happen but better confirm that. */ 610 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 611 panic("initarm: Failed to align the kernel page directory"); 612 613 /* 614 * Allocate a page for the system vectors page 615 */ 616 alloc_pages(systempage.pv_pa, 1); 617 618 /* Allocate stacks for all modes */ 619 valloc_pages(irqstack, IRQ_STACK_SIZE); 620 valloc_pages(abtstack, ABT_STACK_SIZE); 621 valloc_pages(undstack, UND_STACK_SIZE); 622 valloc_pages(kernelstack, UPAGES); 623 624 #ifdef VERBOSE_INIT_ARM 625 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 626 irqstack.pv_va); 627 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 628 abtstack.pv_va); 629 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 630 undstack.pv_va); 631 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 632 kernelstack.pv_va); 633 #endif 634 635 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 636 637 /* 638 * Ok we have allocated physical pages for the primary kernel 639 * page tables. Save physical_freeend for when we give whats left 640 * of memory below 2Mbyte to UVM. 641 */ 642 643 physical_freeend_low = physical_freeend; 644 645 #ifdef VERBOSE_INIT_ARM 646 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 647 #endif 648 649 /* 650 * Now we start construction of the L1 page table 651 * We start by mapping the L2 page tables into the L1. 652 * This means that we can replace L1 mappings later on if necessary 653 */ 654 l1pagetable = kernel_l1pt.pv_pa; 655 656 /* Map the L2 pages tables in the L1 page table */ 657 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 658 &kernel_pt_table[KERNEL_PT_SYS]); 659 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 660 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 661 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 662 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 663 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 664 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 665 666 /* update the top of the kernel VM */ 667 pmap_curmaxkvaddr = 668 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("Mapping kernel\n"); 672 #endif 673 674 /* Now we fill in the L2 pagetable for the kernel static code/data */ 675 { 676 extern char etext[], _end[]; 677 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 678 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 679 u_int logical; 680 681 textsize = (textsize + PGOFSET) & ~PGOFSET; 682 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 683 684 logical = 0x00200000; /* offset of kernel in RAM */ 685 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 686 physical_start + logical, textsize, 687 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 688 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 689 physical_start + logical, totalsize - textsize, 690 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 691 } 692 693 #ifdef VERBOSE_INIT_ARM 694 printf("Constructing L2 page tables\n"); 695 #endif 696 697 /* Map the stack pages */ 698 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 699 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 701 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 702 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 703 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 704 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 705 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 706 707 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 708 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 709 710 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 711 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 712 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 713 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 714 } 715 716 /* Map the vector page. */ 717 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 718 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 719 720 /* Map the statically mapped devices. */ 721 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 722 723 /* 724 * Update the physical_freestart/physical_freeend/free_pages 725 * variables. 726 */ 727 { 728 extern char _end[]; 729 730 physical_freestart = physical_start + 731 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 732 KERNEL_BASE); 733 physical_freeend = physical_end; 734 free_pages = 735 (physical_freeend - physical_freestart) / PAGE_SIZE; 736 } 737 738 /* 739 * Now we have the real page tables in place so we can switch to them. 740 * Once this is done we will be running with the REAL kernel page 741 * tables. 742 */ 743 744 /* Switch tables */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 747 physical_freestart, free_pages, free_pages); 748 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 749 #endif 750 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 751 cpu_setttb(kernel_l1pt.pv_pa, true); 752 cpu_tlb_flushID(); 753 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 754 755 /* 756 * Moved from cpu_startup() as data_abort_handler() references 757 * this during uvm init 758 */ 759 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 760 761 #ifdef VERBOSE_INIT_ARM 762 printf("done!\n"); 763 #endif 764 765 #ifdef VERBOSE_INIT_ARM 766 printf("bootstrap done.\n"); 767 #endif 768 769 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 770 771 /* 772 * Pages were allocated during the secondary bootstrap for the 773 * stacks for different CPU modes. 774 * We must now set the r13 registers in the different CPU modes to 775 * point to these stacks. 776 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 777 * of the stack memory. 778 */ 779 #ifdef VERBOSE_INIT_ARM 780 printf("init subsystems: stacks "); 781 #endif 782 783 set_stackptr(PSR_IRQ32_MODE, 784 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 785 set_stackptr(PSR_ABT32_MODE, 786 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 787 set_stackptr(PSR_UND32_MODE, 788 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 789 790 /* 791 * Well we should set a data abort handler. 792 * Once things get going this will change as we will need a proper 793 * handler. 794 * Until then we will use a handler that just panics but tells us 795 * why. 796 * Initialisation of the vectors will just panic on a data abort. 797 * This just fills in a slightly better one. 798 */ 799 #ifdef VERBOSE_INIT_ARM 800 printf("vectors "); 801 #endif 802 data_abort_handler_address = (u_int)data_abort_handler; 803 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 804 undefined_handler_address = (u_int)undefinedinstruction_bounce; 805 806 /* Initialise the undefined instruction handlers */ 807 #ifdef VERBOSE_INIT_ARM 808 printf("undefined "); 809 #endif 810 undefined_init(); 811 812 /* Load memory into UVM. */ 813 #ifdef VERBOSE_INIT_ARM 814 printf("page "); 815 #endif 816 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 817 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 818 atop(physical_freestart), atop(physical_freeend), 819 VM_FREELIST_DEFAULT); 820 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 821 atop(0xc0000000), atop(physical_freeend_low), 822 VM_FREELIST_DEFAULT); 823 physmem = bootconfig.dram[0].pages; 824 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 825 size_t start = bootconfig.dram[loop].address; 826 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 827 uvm_page_physload(atop(start), atop(start + size), 828 atop(start), atop(start + size), 829 VM_FREELIST_DEFAULT); 830 physmem += bootconfig.dram[loop].pages; 831 } 832 833 /* Boot strap pmap telling it where the kernel page table is */ 834 #ifdef VERBOSE_INIT_ARM 835 printf("pmap "); 836 #endif 837 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 838 839 /* Setup the IRQ system */ 840 #ifdef VERBOSE_INIT_ARM 841 printf("irq "); 842 #endif 843 ep93xx_intr_init(); 844 #if NISA > 0 845 isa_intr_init(); 846 847 #ifdef VERBOSE_INIT_ARM 848 printf("isa "); 849 #endif 850 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 851 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 852 #endif 853 854 #ifdef VERBOSE_INIT_ARM 855 printf("done.\n"); 856 #endif 857 858 #ifdef BOOTHOWTO 859 boothowto = BOOTHOWTO; 860 #endif 861 862 #ifdef DDB 863 db_machine_init(); 864 if (boothowto & RB_KDB) 865 Debugger(); 866 #endif 867 868 /* We have our own device_register() */ 869 evbarm_device_register = armadillo9_device_register; 870 871 /* We return the new stack pointer address */ 872 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 873 } 874 875 void 876 consinit(void) 877 { 878 static int consinit_called; 879 #if NEPCOM > 0 880 bus_space_handle_t ioh; 881 #endif 882 883 if (consinit_called != 0) 884 return; 885 886 consinit_called = 1; 887 888 /* 889 * Console devices are already mapped in VA. Our devmap reflects 890 * this, so register it now so drivers can map the console 891 * device. 892 */ 893 pmap_devmap_register(armadillo9_devmap); 894 895 #if NEPCOM > 0 896 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 897 EP93XX_APB_UART_SIZE, 0, &ioh); 898 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 899 ioh, comcnspeed, comcnmode)) 900 { 901 panic("can't init serial console"); 902 } 903 #else 904 panic("serial console not configured"); 905 #endif 906 #if KGDB 907 #if NEPCOM > 0 908 if (strcmp(kgdb_devname, "epcom") == 0) { 909 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 910 kgdb_devmode); 911 } 912 #endif /* NEPCOM > 0 */ 913 #endif /* KGDB */ 914 } 915 916 917 bus_dma_tag_t 918 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 919 { 920 int i; 921 struct arm32_bus_dma_tag *dmat; 922 923 for (i = 0; i < bootconfig.dramblocks; i++) { 924 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 925 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 926 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 927 PAGE_SIZE; 928 } 929 930 dmat = dma_tag_template; 931 932 dmat->_ranges = armadillo9_dma_ranges; 933 dmat->_nranges = bootconfig.dramblocks; 934 935 return dmat; 936 } 937
Indexes created Tue Sep 30 11:09:46 GMT 2025