armadillo9_machdep.c revision 1.4
1 /* $NetBSD: armadillo9_machdep.c,v 1.4 2006/02/13 12:24:21 hamajima 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 1.4 2006/02/13 12:24:21 hamajima 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 <uvm/uvm_extern.h> 131 132 #include <dev/cons.h> 133 134 #include <machine/db_machdep.h> 135 #include <ddb/db_sym.h> 136 #include <ddb/db_extern.h> 137 138 #define DRAM_BLOCKS 4 139 #include <machine/bootconfig.h> 140 #include <machine/bus.h> 141 #include <machine/cpu.h> 142 #include <machine/frame.h> 143 #include <arm/undefined.h> 144 145 #include <arm/arm32/machdep.h> 146 147 #include <arm/ep93xx/ep93xxreg.h> 148 #include <arm/ep93xx/ep93xxvar.h> 149 150 #include "epwdog.h" 151 #if NEPWDOG > 0 152 #include <arm/ep93xx/epwdogvar.h> 153 #endif 154 #include <arm/ep93xx/epwdogreg.h> 155 156 #include <dev/ic/comreg.h> 157 #include <dev/ic/comvar.h> 158 159 #include "epcom.h" 160 #if NEPCOM > 0 161 #include <arm/ep93xx/epcomvar.h> 162 #endif 163 164 #include "isa.h" 165 #if NISA > 0 166 #include <dev/isa/isareg.h> 167 #include <dev/isa/isavar.h> 168 #endif 169 170 #include <machine/isa_machdep.h> 171 172 #include <evbarm/armadillo/armadillo9reg.h> 173 #include <evbarm/armadillo/armadillo9var.h> 174 175 struct armadillo_model_t *armadillo_model = 0; 176 static struct armadillo_model_t armadillo_model_table[] = { 177 { DEVCFG_ARMADILLO9, "Armadillo-9" }, 178 { DEVCFG_ARMADILLO210, "Armadillo-210" }, 179 { 0, "Armadillo(unknown model)" } }; 180 181 #include "opt_ipkdb.h" 182 #include "ksyms.h" 183 184 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 185 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 186 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 187 188 /* 189 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 190 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 191 */ 192 #define KERNEL_VM_SIZE 0x0c000000 193 194 /* 195 * Address to call from cpu_reset() to reset the machine. 196 * This is machine architecture dependant as it varies depending 197 * on where the ROM appears when you turn the MMU off. 198 */ 199 200 u_int cpu_reset_address = 0x80090000; 201 202 /* Define various stack sizes in pages */ 203 #define IRQ_STACK_SIZE 8 204 #define ABT_STACK_SIZE 8 205 #ifdef IPKDB 206 #define UND_STACK_SIZE 16 207 #else 208 #define UND_STACK_SIZE 8 209 #endif 210 211 BootConfig bootconfig; /* Boot config storage */ 212 char *boot_args = NULL; 213 char *boot_file = NULL; 214 215 vm_offset_t physical_start; 216 vm_offset_t physical_freestart; 217 vm_offset_t physical_freeend; 218 vm_offset_t physical_freeend_low; 219 vm_offset_t physical_end; 220 u_int free_pages; 221 int physmem = 0; 222 223 /* Physical and virtual addresses for some global pages */ 224 pv_addr_t systempage; 225 pv_addr_t irqstack; 226 pv_addr_t undstack; 227 pv_addr_t abtstack; 228 pv_addr_t kernelstack; 229 230 vm_offset_t msgbufphys; 231 232 static struct arm32_dma_range armadillo9_dma_ranges[4]; 233 234 #if NISA > 0 235 extern void isa_armadillo9_init(u_int, u_int); 236 #endif 237 238 extern u_int data_abort_handler_address; 239 extern u_int prefetch_abort_handler_address; 240 extern u_int undefined_handler_address; 241 242 #ifdef PMAP_DEBUG 243 extern int pmap_debug_level; 244 #endif 245 246 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 247 248 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 249 #define KERNEL_PT_KERNEL_NUM 4 250 /* L2 tables for mapping kernel VM */ 251 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 252 253 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 254 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 255 256 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 257 258 struct user *proc0paddr; 259 260 /* Prototypes */ 261 262 void consinit(void); 263 /* 264 * Define the default console speed for the machine. 265 */ 266 #if NEPCOM > 0 267 #ifndef CONSPEED 268 #define CONSPEED B115200 269 #endif /* ! CONSPEED */ 270 271 #ifndef CONMODE 272 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 273 #endif 274 275 #ifndef CONUNIT 276 #define CONUNIT 0 277 #endif 278 279 int comcnspeed = CONSPEED; 280 int comcnmode = CONMODE; 281 const unsigned long comaddr[] = { 282 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 283 #endif 284 285 #if KGDB 286 #ifndef KGDB_DEVNAME 287 #error Must define KGDB_DEVNAME 288 #endif 289 const char kgdb_devname[] = KGDB_DEVNAME; 290 291 #ifndef KGDB_DEVADDR 292 #error Must define KGDB_DEVADDR 293 #endif 294 unsigned long kgdb_devaddr = KGDB_DEVADDR; 295 296 #ifndef KGDB_DEVRATE 297 #define KGDB_DEVRATE CONSPEED 298 #endif 299 int kgdb_devrate = KGDB_DEVRATE; 300 301 #ifndef KGDB_DEVMODE 302 #define KGDB_DEVMODE CONMODE 303 #endif 304 int kgdb_devmode = KGDB_DEVMODE; 305 #endif /* KGDB */ 306 307 /* 308 * void cpu_reboot(int howto, char *bootstr) 309 * 310 * Reboots the system 311 * 312 * Deal with any syncing, unmounting, dumping and shutdown hooks, 313 * then reset the CPU. 314 */ 315 void 316 cpu_reboot(int howto, char *bootstr) 317 { 318 /* 319 * If we are still cold then hit the air brakes 320 * and crash to earth fast 321 */ 322 if (cold) { 323 doshutdownhooks(); 324 printf("\r\n"); 325 printf("The operating system has halted.\r\n"); 326 printf("Please press any key to reboot.\r\n"); 327 cngetc(); 328 printf("\r\nrebooting...\r\n"); 329 goto reset; 330 } 331 332 /* Disable console buffering */ 333 334 /* 335 * If RB_NOSYNC was not specified sync the discs. 336 * Note: Unless cold is set to 1 here, syslogd will die during the 337 * unmount. It looks like syslogd is getting woken up only to find 338 * that it cannot page part of the binary in as the filesystem has 339 * been unmounted. 340 */ 341 if (!(howto & RB_NOSYNC)) 342 bootsync(); 343 344 /* Say NO to interrupts */ 345 splhigh(); 346 347 /* Do a dump if requested. */ 348 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 349 dumpsys(); 350 351 /* Run any shutdown hooks */ 352 doshutdownhooks(); 353 354 /* Make sure IRQ's are disabled */ 355 IRQdisable; 356 357 if (howto & RB_HALT) { 358 printf("\r\n"); 359 printf("The operating system has halted.\r\n"); 360 printf("Please press any key to reboot.\r\n"); 361 cngetc(); 362 } 363 364 printf("\r\nrebooting...\r\n"); 365 reset: 366 /* 367 * Make really really sure that all interrupts are disabled, 368 * and poke the Internal Bus and Peripheral Bus reset lines. 369 */ 370 (void) disable_interrupts(I32_bit|F32_bit); 371 #if NEPWDOG > 0 372 epwdog_reset(); 373 #else 374 { 375 u_int32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 376 u_int32_t val = EP93XX_WDOG_ENABLE; 377 __asm volatile ( 378 "str %1, [%0]\n" 379 : 380 : "r" (ctrl), "r" (val) 381 ); 382 } 383 #endif 384 for (;;); 385 } 386 387 /* Static device mappings. */ 388 static const struct pmap_devmap armadillo9_devmap[] = { 389 { 390 EP93XX_AHB_VBASE, 391 EP93XX_AHB_HWBASE, 392 EP93XX_AHB_SIZE, 393 VM_PROT_READ|VM_PROT_WRITE, 394 PTE_NOCACHE, 395 }, 396 397 { 398 EP93XX_APB_VBASE, 399 EP93XX_APB_HWBASE, 400 EP93XX_APB_SIZE, 401 VM_PROT_READ|VM_PROT_WRITE, 402 PTE_NOCACHE, 403 }, 404 405 { 406 EP93XX_PCMCIA0_VBASE, 407 EP93XX_PCMCIA0_HWBASE, 408 EP93XX_PCMCIA_SIZE, 409 VM_PROT_READ|VM_PROT_WRITE, 410 PTE_NOCACHE, 411 }, 412 413 /* 414 * IO8 and IO16 space *must* be mapped contiguously with 415 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 416 * on that! 417 */ 418 { 419 ARMADILLO9_IO8_VBASE, 420 ARMADILLO9_IO8_HWBASE, 421 ARMADILLO9_IO8_SIZE, 422 VM_PROT_READ|VM_PROT_WRITE, 423 PTE_NOCACHE, 424 }, 425 426 { 427 ARMADILLO9_IO16_VBASE, 428 ARMADILLO9_IO16_HWBASE, 429 ARMADILLO9_IO16_SIZE, 430 VM_PROT_READ|VM_PROT_WRITE, 431 PTE_NOCACHE, 432 }, 433 434 { 435 0, 436 0, 437 0, 438 0, 439 0, 440 } 441 }; 442 443 /* 444 * u_int initarm(...) 445 * 446 * Initial entry point on startup. This gets called before main() is 447 * entered. 448 * It should be responsible for setting up everything that must be 449 * in place when main is called. 450 * This includes 451 * Taking a copy of the boot configuration structure. 452 * Initialising the physical console so characters can be printed. 453 * Setting up page tables for the kernel 454 * Initialising interrupt controllers to a sane default state 455 */ 456 u_int 457 initarm(void *arg) 458 { 459 int loop; 460 int loop1; 461 u_int l1pagetable; 462 pv_addr_t kernel_l1pt; 463 struct bootparam_tag *bootparam_p; 464 unsigned long devcfg; 465 466 /* 467 * Since we map the on-board devices VA==PA, and the kernel 468 * is running VA==PA, it's possible for us to initialize 469 * the console now. 470 */ 471 consinit(); 472 473 /* identify model */ 474 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 475 + EP93XX_APB_SYSCON 476 + EP93XX_SYSCON_DeviceCfg)); 477 for (armadillo_model = &armadillo_model_table[0]; 478 armadillo_model->devcfg; armadillo_model++) 479 if (devcfg == armadillo_model->devcfg) 480 break; 481 482 /* Talk to the user */ 483 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 484 485 /* set some informations from bootloader */ 486 bootparam_p = (struct bootparam_tag *)bootparam; 487 bootconfig.dramblocks = 0; 488 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 489 switch (bootparam_p->hdr.tag) { 490 case BOOTPARAM_TAG_MEM: 491 if (bootconfig.dramblocks < DRAM_BLOCKS) { 492 #ifdef VERBOSE_INIT_ARM 493 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 494 bootconfig.dramblocks, 495 bootparam_p->u.mem.start, 496 bootparam_p->u.mem.size); 497 #endif 498 bootconfig.dram[bootconfig.dramblocks].address = 499 bootparam_p->u.mem.start; 500 bootconfig.dram[bootconfig.dramblocks].pages = 501 bootparam_p->u.mem.size / PAGE_SIZE; 502 bootconfig.dramblocks++; 503 } 504 break; 505 case BOOTPARAM_TAG_CMDLINE: 506 #ifdef VERBOSE_INIT_ARM 507 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 508 #endif 509 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 510 break; 511 } 512 bootparam_p = bootparam_tag_next(bootparam_p); 513 } 514 515 /* 516 * Heads up ... Setup the CPU / MMU / TLB functions 517 */ 518 if (set_cpufuncs()) 519 panic("cpu not recognized!"); 520 521 #ifdef VERBOSE_INIT_ARM 522 printf("initarm: Configuring system ...\n"); 523 #endif 524 /* 525 * Set up the variables that define the availablilty of 526 * physical memory. For now, we're going to set 527 * physical_freestart to 0xc0200000 (where the kernel 528 * was loaded), and allocate the memory we need downwards. 529 * If we get too close to the L1 table that we set up, we 530 * will panic. We will update physical_freestart and 531 * physical_freeend later to reflect what pmap_bootstrap() 532 * wants to see. 533 * 534 * XXX pmap_bootstrap() needs an enema. 535 */ 536 physical_start = bootconfig.dram[0].address; 537 physical_end = bootconfig.dram[0].address 538 + (bootconfig.dram[0].pages * PAGE_SIZE); 539 540 physical_freestart = 0xc0018000UL; 541 physical_freeend = 0xc0200000UL; 542 543 physmem = (physical_end - physical_start) / PAGE_SIZE; 544 545 #ifdef VERBOSE_INIT_ARM 546 /* Tell the user about the memory */ 547 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 548 physical_start, physical_end - 1); 549 #endif 550 551 /* 552 * Okay, the kernel starts 2MB in from the bottom of physical 553 * memory. We are going to allocate our bootstrap pages downwards 554 * from there. 555 * 556 * We need to allocate some fixed page tables to get the kernel 557 * going. We allocate one page directory and a number of page 558 * tables and store the physical addresses in the kernel_pt_table 559 * array. 560 * 561 * The kernel page directory must be on a 16K boundary. The page 562 * tables must be on 4K bounaries. What we do is allocate the 563 * page directory on the first 16K boundary that we encounter, and 564 * the page tables on 4K boundaries otherwise. Since we allocate 565 * at least 3 L2 page tables, we are guaranteed to encounter at 566 * least one 16K aligned region. 567 */ 568 569 #ifdef VERBOSE_INIT_ARM 570 printf("Allocating page tables\n"); 571 #endif 572 573 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 577 physical_freestart, free_pages, free_pages); 578 #endif 579 580 /* Define a macro to simplify memory allocation */ 581 #define valloc_pages(var, np) \ 582 alloc_pages((var).pv_pa, (np)); \ 583 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 584 585 #define alloc_pages(var, np) \ 586 physical_freeend -= ((np) * PAGE_SIZE); \ 587 if (physical_freeend < physical_freestart) \ 588 panic("initarm: out of memory"); \ 589 (var) = physical_freeend; \ 590 free_pages -= (np); \ 591 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 592 593 loop1 = 0; 594 kernel_l1pt.pv_pa = 0; 595 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 596 /* Are we 16KB aligned for an L1 ? */ 597 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 598 && kernel_l1pt.pv_pa == 0) { 599 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 600 } else { 601 valloc_pages(kernel_pt_table[loop1], 602 L2_TABLE_SIZE / PAGE_SIZE); 603 ++loop1; 604 } 605 } 606 607 /* This should never be able to happen but better confirm that. */ 608 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 609 panic("initarm: Failed to align the kernel page directory"); 610 611 /* 612 * Allocate a page for the system vectors page 613 */ 614 alloc_pages(systempage.pv_pa, 1); 615 616 /* Allocate stacks for all modes */ 617 valloc_pages(irqstack, IRQ_STACK_SIZE); 618 valloc_pages(abtstack, ABT_STACK_SIZE); 619 valloc_pages(undstack, UND_STACK_SIZE); 620 valloc_pages(kernelstack, UPAGES); 621 622 #ifdef VERBOSE_INIT_ARM 623 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 624 irqstack.pv_va); 625 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 626 abtstack.pv_va); 627 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 628 undstack.pv_va); 629 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 630 kernelstack.pv_va); 631 #endif 632 633 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 634 635 /* 636 * Ok we have allocated physical pages for the primary kernel 637 * page tables. Save physical_freeend for when we give whats left 638 * of memory below 2Mbyte to UVM. 639 */ 640 641 physical_freeend_low = physical_freeend; 642 643 #ifdef VERBOSE_INIT_ARM 644 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 645 #endif 646 647 /* 648 * Now we start construction of the L1 page table 649 * We start by mapping the L2 page tables into the L1. 650 * This means that we can replace L1 mappings later on if necessary 651 */ 652 l1pagetable = kernel_l1pt.pv_pa; 653 654 /* Map the L2 pages tables in the L1 page table */ 655 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 656 &kernel_pt_table[KERNEL_PT_SYS]); 657 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 658 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 659 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 660 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 661 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 662 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 663 664 /* update the top of the kernel VM */ 665 pmap_curmaxkvaddr = 666 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 667 668 #ifdef VERBOSE_INIT_ARM 669 printf("Mapping kernel\n"); 670 #endif 671 672 /* Now we fill in the L2 pagetable for the kernel static code/data */ 673 { 674 extern char etext[], _end[]; 675 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 676 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 677 u_int logical; 678 679 textsize = (textsize + PGOFSET) & ~PGOFSET; 680 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 681 682 logical = 0x00200000; /* offset of kernel in RAM */ 683 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 684 physical_start + logical, textsize, 685 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 686 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 687 physical_start + logical, totalsize - textsize, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 } 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("Constructing L2 page tables\n"); 693 #endif 694 695 /* Map the stack pages */ 696 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 697 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 699 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 701 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 702 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 703 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 704 705 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 706 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 707 708 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 709 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 710 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 711 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 712 } 713 714 /* Map the vector page. */ 715 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 716 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 717 718 /* Map the statically mapped devices. */ 719 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 720 721 /* 722 * Update the physical_freestart/physical_freeend/free_pages 723 * variables. 724 */ 725 { 726 extern char _end[]; 727 728 physical_freestart = physical_start + 729 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 730 KERNEL_BASE); 731 physical_freeend = physical_end; 732 free_pages = 733 (physical_freeend - physical_freestart) / PAGE_SIZE; 734 } 735 736 /* 737 * Now we have the real page tables in place so we can switch to them. 738 * Once this is done we will be running with the REAL kernel page 739 * tables. 740 */ 741 742 /* Switch tables */ 743 #ifdef VERBOSE_INIT_ARM 744 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 745 physical_freestart, free_pages, free_pages); 746 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 747 #endif 748 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 749 setttb(kernel_l1pt.pv_pa); 750 cpu_tlb_flushID(); 751 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 752 753 /* 754 * Moved from cpu_startup() as data_abort_handler() references 755 * this during uvm init 756 */ 757 proc0paddr = (struct user *)kernelstack.pv_va; 758 lwp0.l_addr = proc0paddr; 759 760 #ifdef VERBOSE_INIT_ARM 761 printf("done!\n"); 762 #endif 763 764 #ifdef VERBOSE_INIT_ARM 765 printf("bootstrap done.\n"); 766 #endif 767 768 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 769 770 /* 771 * Pages were allocated during the secondary bootstrap for the 772 * stacks for different CPU modes. 773 * We must now set the r13 registers in the different CPU modes to 774 * point to these stacks. 775 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 776 * of the stack memory. 777 */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("init subsystems: stacks "); 780 #endif 781 782 set_stackptr(PSR_IRQ32_MODE, 783 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 784 set_stackptr(PSR_ABT32_MODE, 785 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 786 set_stackptr(PSR_UND32_MODE, 787 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 788 789 /* 790 * Well we should set a data abort handler. 791 * Once things get going this will change as we will need a proper 792 * handler. 793 * Until then we will use a handler that just panics but tells us 794 * why. 795 * Initialisation of the vectors will just panic on a data abort. 796 * This just fills in a slightly better one. 797 */ 798 #ifdef VERBOSE_INIT_ARM 799 printf("vectors "); 800 #endif 801 data_abort_handler_address = (u_int)data_abort_handler; 802 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 803 undefined_handler_address = (u_int)undefinedinstruction_bounce; 804 805 /* Initialise the undefined instruction handlers */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("undefined "); 808 #endif 809 undefined_init(); 810 811 /* Load memory into UVM. */ 812 #ifdef VERBOSE_INIT_ARM 813 printf("page "); 814 #endif 815 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 816 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 817 atop(physical_freestart), atop(physical_freeend), 818 VM_FREELIST_DEFAULT); 819 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 820 atop(0xc0000000), atop(physical_freeend_low), 821 VM_FREELIST_DEFAULT); 822 physmem = bootconfig.dram[0].pages; 823 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 824 size_t start = bootconfig.dram[loop].address; 825 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 826 uvm_page_physload(atop(start), atop(start + size), 827 atop(start), atop(start + size), 828 VM_FREELIST_DEFAULT); 829 physmem += bootconfig.dram[loop].pages; 830 } 831 832 /* Boot strap pmap telling it where the kernel page table is */ 833 #ifdef VERBOSE_INIT_ARM 834 printf("pmap "); 835 #endif 836 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 837 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 IPKDB 863 /* Initialise ipkdb */ 864 ipkdb_init(); 865 if (boothowto & RB_KDB) 866 ipkdb_connect(0); 867 #endif 868 869 #if NKSYMS || defined(DDB) || defined(LKM) 870 /* Firmware doesn't load symbols. */ 871 ksyms_init(0, NULL, NULL); 872 #endif 873 874 #ifdef DDB 875 db_machine_init(); 876 if (boothowto & RB_KDB) 877 Debugger(); 878 #endif 879 880 /* We return the new stack pointer address */ 881 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 882 } 883 884 void 885 consinit(void) 886 { 887 static int consinit_called; 888 #if NEPCOM > 0 889 bus_space_handle_t ioh; 890 #endif 891 892 if (consinit_called != 0) 893 return; 894 895 consinit_called = 1; 896 897 /* 898 * Console devices are already mapped in VA. Our devmap reflects 899 * this, so register it now so drivers can map the console 900 * device. 901 */ 902 pmap_devmap_register(armadillo9_devmap); 903 904 #if NEPCOM > 0 905 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 906 EP93XX_APB_UART_SIZE, 0, &ioh); 907 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 908 ioh, comcnspeed, comcnmode)) 909 { 910 panic("can't init serial console"); 911 } 912 #else 913 panic("serial console not configured"); 914 #endif 915 #if KGDB 916 #if NEPCOM > 0 917 if (strcmp(kgdb_devname, "epcom") == 0) { 918 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 919 kgdb_devmode); 920 } 921 #endif /* NEPCOM > 0 */ 922 #endif /* KGDB */ 923 } 924 925 926 bus_dma_tag_t 927 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 928 { 929 int i; 930 struct arm32_bus_dma_tag *dmat; 931 932 for (i = 0; i < bootconfig.dramblocks; i++) { 933 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 934 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 935 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 936 PAGE_SIZE; 937 } 938 939 dmat = dma_tag_template; 940 941 dmat->_ranges = armadillo9_dma_ranges; 942 dmat->_nranges = bootconfig.dramblocks; 943 944 return dmat; 945 } 946
Indexes created Mon Sep 29 21:09:56 GMT 2025