armadillo9_machdep.c revision 1.30
1 /* $NetBSD: armadillo9_machdep.c,v 1.30 2018/07/31 06:46:26 skrll 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 1.30 2018/07/31 06:46:26 skrll Exp $"); 114 115 #include "opt_arm_debug.h" 116 #include "opt_ddb.h" 117 #include "opt_kgdb.h" 118 #include "opt_pmap_debug.h" 119 120 #include <sys/param.h> 121 #include <sys/device.h> 122 #include <sys/systm.h> 123 #include <sys/kernel.h> 124 #include <sys/exec.h> 125 #include <sys/proc.h> 126 #include <sys/msgbuf.h> 127 #include <sys/reboot.h> 128 #include <sys/termios.h> 129 #include <sys/ksyms.h> 130 #include <sys/bus.h> 131 #include <sys/cpu.h> 132 133 #include <net/if.h> 134 #include <net/if_ether.h> 135 136 #include <uvm/uvm_extern.h> 137 138 #include <dev/cons.h> 139 140 #include <machine/db_machdep.h> 141 #include <ddb/db_sym.h> 142 #include <ddb/db_extern.h> 143 144 #define DRAM_BLOCKS 4 145 #include <machine/bootconfig.h> 146 #include <machine/autoconf.h> 147 #include <arm/locore.h> 148 #include <arm/undefined.h> 149 150 /* Define various stack sizes in pages */ 151 #define IRQ_STACK_SIZE 8 152 #define ABT_STACK_SIZE 8 153 #define UND_STACK_SIZE 8 154 155 #include <arm/arm32/machdep.h> 156 157 #include <arm/ep93xx/ep93xxreg.h> 158 #include <arm/ep93xx/ep93xxvar.h> 159 160 #include "epwdog.h" 161 #if NEPWDOG > 0 162 #include <arm/ep93xx/epwdogvar.h> 163 #endif 164 #include <arm/ep93xx/epwdogreg.h> 165 166 #include <dev/ic/comreg.h> 167 #include <dev/ic/comvar.h> 168 169 #include "epcom.h" 170 #if NEPCOM > 0 171 #include <arm/ep93xx/epcomvar.h> 172 #endif 173 174 #include "isa.h" 175 #if NISA > 0 176 #include <dev/isa/isareg.h> 177 #include <dev/isa/isavar.h> 178 #endif 179 180 #include <machine/isa_machdep.h> 181 182 #include <evbarm/armadillo/armadillo9reg.h> 183 #include <evbarm/armadillo/armadillo9var.h> 184 185 struct armadillo_model_t *armadillo_model = 0; 186 static struct armadillo_model_t armadillo_model_table[] = { 187 { DEVCFG_ARMADILLO9, "Armadillo-9" }, 188 { DEVCFG_ARMADILLO210, "Armadillo-210" }, 189 { 0, "Armadillo(unknown model)" } }; 190 191 #include "ksyms.h" 192 193 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 194 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 195 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 196 197 /* 198 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 199 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 200 */ 201 #define KERNEL_VM_SIZE 0x0c000000 202 203 204 BootConfig bootconfig; /* Boot config storage */ 205 char *boot_args = NULL; 206 char *boot_file = NULL; 207 208 vaddr_t physical_start; 209 vaddr_t physical_freestart; 210 vaddr_t physical_freeend; 211 vaddr_t physical_freeend_low; 212 vaddr_t physical_end; 213 u_int free_pages; 214 215 paddr_t msgbufphys; 216 217 static struct arm32_dma_range armadillo9_dma_ranges[4]; 218 219 #if NISA > 0 220 extern void isa_armadillo9_init(u_int, u_int); 221 #endif 222 223 #ifdef PMAP_DEBUG 224 extern int pmap_debug_level; 225 #endif 226 227 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 228 229 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 230 #define KERNEL_PT_KERNEL_NUM 4 231 /* L2 tables for mapping kernel VM */ 232 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 233 234 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 235 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 236 237 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 238 239 /* Prototypes */ 240 241 void consinit(void); 242 /* 243 * Define the default console speed for the machine. 244 */ 245 #if NEPCOM > 0 246 #ifndef CONSPEED 247 #define CONSPEED B115200 248 #endif /* ! CONSPEED */ 249 250 #ifndef CONMODE 251 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 252 #endif 253 254 #ifndef CONUNIT 255 #define CONUNIT 0 256 #endif 257 258 int comcnspeed = CONSPEED; 259 int comcnmode = CONMODE; 260 const unsigned long comaddr[] = { 261 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 262 #endif 263 264 #if KGDB 265 #ifndef KGDB_DEVNAME 266 #error Must define KGDB_DEVNAME 267 #endif 268 const char kgdb_devname[] = KGDB_DEVNAME; 269 270 #ifndef KGDB_DEVADDR 271 #error Must define KGDB_DEVADDR 272 #endif 273 unsigned long kgdb_devaddr = KGDB_DEVADDR; 274 275 #ifndef KGDB_DEVRATE 276 #define KGDB_DEVRATE CONSPEED 277 #endif 278 int kgdb_devrate = KGDB_DEVRATE; 279 280 #ifndef KGDB_DEVMODE 281 #define KGDB_DEVMODE CONMODE 282 #endif 283 int kgdb_devmode = KGDB_DEVMODE; 284 #endif /* KGDB */ 285 286 /* 287 * MAC address for the built-in Ethernet. 288 */ 289 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 290 291 static void 292 armadillo9_device_register(device_t dev, void *aux) 293 { 294 295 /* MAC address for the built-in Ethernet. */ 296 if (device_is_a(dev, "epe")) { 297 prop_data_t pd = prop_data_create_data_nocopy( 298 armadillo9_ethaddr, ETHER_ADDR_LEN); 299 KASSERT(pd != NULL); 300 if (prop_dictionary_set(device_properties(dev), 301 "mac-address", pd) == false) { 302 printf("WARNING: unable to set mac-addr property " 303 "for %s\n", device_xname(dev)); 304 } 305 prop_object_release(pd); 306 } 307 } 308 309 /* 310 * void cpu_reboot(int howto, char *bootstr) 311 * 312 * Reboots the system 313 * 314 * Deal with any syncing, unmounting, dumping and shutdown hooks, 315 * then reset the CPU. 316 */ 317 void 318 cpu_reboot(int howto, char *bootstr) 319 { 320 /* 321 * If we are still cold then hit the air brakes 322 * and crash to earth fast 323 */ 324 if (cold) { 325 doshutdownhooks(); 326 pmf_system_shutdown(boothowto); 327 printf("\r\n"); 328 printf("The operating system has halted.\r\n"); 329 printf("Please press any key to reboot.\r\n"); 330 cngetc(); 331 printf("\r\nrebooting...\r\n"); 332 goto reset; 333 } 334 335 /* Disable console buffering */ 336 337 /* 338 * If RB_NOSYNC was not specified sync the discs. 339 * Note: Unless cold is set to 1 here, syslogd will die during the 340 * unmount. It looks like syslogd is getting woken up only to find 341 * that it cannot page part of the binary in as the filesystem has 342 * been unmounted. 343 */ 344 if (!(howto & RB_NOSYNC)) 345 bootsync(); 346 347 /* Say NO to interrupts */ 348 splhigh(); 349 350 /* Do a dump if requested. */ 351 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 352 dumpsys(); 353 354 /* Run any shutdown hooks */ 355 doshutdownhooks(); 356 357 pmf_system_shutdown(boothowto); 358 359 /* Make sure IRQ's are disabled */ 360 IRQdisable; 361 362 if (howto & RB_HALT) { 363 printf("\r\n"); 364 printf("The operating system has halted.\r\n"); 365 printf("Please press any key to reboot.\r\n"); 366 cngetc(); 367 } 368 369 printf("\r\nrebooting...\r\n"); 370 reset: 371 /* 372 * Make really really sure that all interrupts are disabled, 373 * and poke the Internal Bus and Peripheral Bus reset lines. 374 */ 375 (void) disable_interrupts(I32_bit|F32_bit); 376 #if NEPWDOG > 0 377 epwdog_reset(); 378 #else 379 { 380 uint32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 381 uint32_t val = EP93XX_WDOG_ENABLE; 382 __asm volatile ( 383 "str %1, [%0]\n" 384 : 385 : "r" (ctrl), "r" (val) 386 ); 387 } 388 #endif 389 for (;;); 390 } 391 392 /* Static device mappings. */ 393 static const struct pmap_devmap armadillo9_devmap[] = { 394 { 395 EP93XX_AHB_VBASE, 396 EP93XX_AHB_HWBASE, 397 EP93XX_AHB_SIZE, 398 VM_PROT_READ|VM_PROT_WRITE, 399 PTE_NOCACHE, 400 }, 401 402 { 403 EP93XX_APB_VBASE, 404 EP93XX_APB_HWBASE, 405 EP93XX_APB_SIZE, 406 VM_PROT_READ|VM_PROT_WRITE, 407 PTE_NOCACHE, 408 }, 409 410 { 411 EP93XX_PCMCIA0_VBASE, 412 EP93XX_PCMCIA0_HWBASE, 413 EP93XX_PCMCIA_SIZE, 414 VM_PROT_READ|VM_PROT_WRITE, 415 PTE_NOCACHE, 416 }, 417 418 /* 419 * IO8 and IO16 space *must* be mapped contiguously with 420 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 421 * on that! 422 */ 423 { 424 ARMADILLO9_IO8_VBASE, 425 ARMADILLO9_IO8_HWBASE, 426 ARMADILLO9_IO8_SIZE, 427 VM_PROT_READ|VM_PROT_WRITE, 428 PTE_NOCACHE, 429 }, 430 431 { 432 ARMADILLO9_IO16_VBASE, 433 ARMADILLO9_IO16_HWBASE, 434 ARMADILLO9_IO16_SIZE, 435 VM_PROT_READ|VM_PROT_WRITE, 436 PTE_NOCACHE, 437 }, 438 439 { 440 0, 441 0, 442 0, 443 0, 444 0, 445 } 446 }; 447 448 /* 449 * u_int initarm(...) 450 * 451 * Initial entry point on startup. This gets called before main() is 452 * entered. 453 * It should be responsible for setting up everything that must be 454 * in place when main is called. 455 * This includes 456 * Taking a copy of the boot configuration structure. 457 * Initialising the physical console so characters can be printed. 458 * Setting up page tables for the kernel 459 * Initialising interrupt controllers to a sane default state 460 */ 461 u_int 462 initarm(void *arg) 463 { 464 int loop; 465 int loop1; 466 u_int l1pagetable; 467 struct bootparam_tag *bootparam_p; 468 unsigned long devcfg; 469 470 /* 471 * Since we map the on-board devices VA==PA, and the kernel 472 * is running VA==PA, it's possible for us to initialize 473 * the console now. 474 */ 475 consinit(); 476 477 /* identify model */ 478 devcfg = *((volatile unsigned long*)(EP93XX_APB_HWBASE 479 + EP93XX_APB_SYSCON 480 + EP93XX_SYSCON_DeviceCfg)); 481 for (armadillo_model = &armadillo_model_table[0]; 482 armadillo_model->devcfg; armadillo_model++) 483 if (devcfg == armadillo_model->devcfg) 484 break; 485 486 /* Talk to the user */ 487 printf("\nNetBSD/%s booting ...\n", armadillo_model->name); 488 489 /* set some informations from bootloader */ 490 bootparam_p = (struct bootparam_tag *)bootparam; 491 bootconfig.dramblocks = 0; 492 while (bootparam_p->hdr.tag != BOOTPARAM_TAG_NONE) { 493 switch (bootparam_p->hdr.tag) { 494 case BOOTPARAM_TAG_MEM: 495 if (bootconfig.dramblocks < DRAM_BLOCKS) { 496 #ifdef VERBOSE_INIT_ARM 497 printf("dram[%d]: address=0x%08lx, size=0x%08lx\n", 498 bootconfig.dramblocks, 499 bootparam_p->u.mem.start, 500 bootparam_p->u.mem.size); 501 #endif 502 bootconfig.dram[bootconfig.dramblocks].address = 503 bootparam_p->u.mem.start; 504 bootconfig.dram[bootconfig.dramblocks].pages = 505 bootparam_p->u.mem.size / PAGE_SIZE; 506 bootconfig.dramblocks++; 507 } 508 break; 509 case BOOTPARAM_TAG_CMDLINE: 510 #ifdef VERBOSE_INIT_ARM 511 printf("cmdline: %s\n", bootparam_p->u.cmdline.cmdline); 512 #endif 513 parse_mi_bootargs(bootparam_p->u.cmdline.cmdline); 514 break; 515 } 516 bootparam_p = bootparam_tag_next(bootparam_p); 517 } 518 519 /* 520 * Heads up ... Setup the CPU / MMU / TLB functions 521 */ 522 if (set_cpufuncs()) 523 panic("cpu not recognized!"); 524 525 #ifdef VERBOSE_INIT_ARM 526 printf("initarm: Configuring system ...\n"); 527 #endif 528 /* 529 * Set up the variables that define the availablilty of 530 * physical memory. For now, we're going to set 531 * physical_freestart to 0xc0200000 (where the kernel 532 * was loaded), and allocate the memory we need downwards. 533 * If we get too close to the L1 table that we set up, we 534 * will panic. We will update physical_freestart and 535 * physical_freeend later to reflect what pmap_bootstrap() 536 * wants to see. 537 * 538 * XXX pmap_bootstrap() needs an enema. 539 */ 540 physical_start = bootconfig.dram[0].address; 541 physical_end = bootconfig.dram[0].address 542 + (bootconfig.dram[0].pages * PAGE_SIZE); 543 544 physical_freestart = 0xc0018000UL; 545 physical_freeend = 0xc0200000UL; 546 547 physmem = (physical_end - physical_start) / PAGE_SIZE; 548 549 #ifdef VERBOSE_INIT_ARM 550 /* Tell the user about the memory */ 551 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 552 physical_start, physical_end - 1); 553 #endif 554 555 /* 556 * Okay, the kernel starts 2MB in from the bottom of physical 557 * memory. We are going to allocate our bootstrap pages downwards 558 * from there. 559 * 560 * We need to allocate some fixed page tables to get the kernel 561 * going. We allocate one page directory and a number of page 562 * tables and store the physical addresses in the kernel_pt_table 563 * array. 564 * 565 * The kernel page directory must be on a 16K boundary. The page 566 * tables must be on 4K bounaries. What we do is allocate the 567 * page directory on the first 16K boundary that we encounter, and 568 * the page tables on 4K boundaries otherwise. Since we allocate 569 * at least 3 L2 page tables, we are guaranteed to encounter at 570 * least one 16K aligned region. 571 */ 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("Allocating page tables\n"); 575 #endif 576 577 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 578 579 #ifdef VERBOSE_INIT_ARM 580 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 581 physical_freestart, free_pages, free_pages); 582 #endif 583 584 /* Define a macro to simplify memory allocation */ 585 #define valloc_pages(var, np) \ 586 alloc_pages((var).pv_pa, (np)); \ 587 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 588 589 #define alloc_pages(var, np) \ 590 physical_freeend -= ((np) * PAGE_SIZE); \ 591 if (physical_freeend < physical_freestart) \ 592 panic("initarm: out of memory"); \ 593 (var) = physical_freeend; \ 594 free_pages -= (np); \ 595 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 596 597 loop1 = 0; 598 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 599 /* Are we 16KB aligned for an L1 ? */ 600 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 601 && kernel_l1pt.pv_pa == 0) { 602 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 603 } else { 604 valloc_pages(kernel_pt_table[loop1], 605 L2_TABLE_SIZE / PAGE_SIZE); 606 ++loop1; 607 } 608 } 609 610 /* This should never be able to happen but better confirm that. */ 611 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 612 panic("initarm: Failed to align the kernel page directory"); 613 614 /* 615 * Allocate a page for the system vectors page 616 */ 617 alloc_pages(systempage.pv_pa, 1); 618 619 /* Allocate stacks for all modes */ 620 valloc_pages(irqstack, IRQ_STACK_SIZE); 621 valloc_pages(abtstack, ABT_STACK_SIZE); 622 valloc_pages(undstack, UND_STACK_SIZE); 623 valloc_pages(kernelstack, UPAGES); 624 625 #ifdef VERBOSE_INIT_ARM 626 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 627 irqstack.pv_va); 628 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 629 abtstack.pv_va); 630 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 631 undstack.pv_va); 632 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 633 kernelstack.pv_va); 634 #endif 635 636 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 637 638 /* 639 * Ok we have allocated physical pages for the primary kernel 640 * page tables. Save physical_freeend for when we give whats left 641 * of memory below 2Mbyte to UVM. 642 */ 643 644 physical_freeend_low = physical_freeend; 645 646 #ifdef VERBOSE_INIT_ARM 647 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 648 #endif 649 650 /* 651 * Now we start construction of the L1 page table 652 * We start by mapping the L2 page tables into the L1. 653 * This means that we can replace L1 mappings later on if necessary 654 */ 655 l1pagetable = kernel_l1pt.pv_pa; 656 657 /* Map the L2 pages tables in the L1 page table */ 658 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 659 &kernel_pt_table[KERNEL_PT_SYS]); 660 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 661 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 662 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 663 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 664 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 665 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 666 667 /* update the top of the kernel VM */ 668 pmap_curmaxkvaddr = 669 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("Mapping kernel\n"); 673 #endif 674 675 /* Now we fill in the L2 pagetable for the kernel static code/data */ 676 { 677 extern char etext[], _end[]; 678 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 679 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 680 u_int logical; 681 682 textsize = (textsize + PGOFSET) & ~PGOFSET; 683 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 684 685 logical = 0x00200000; /* offset of kernel in RAM */ 686 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 687 physical_start + logical, textsize, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 690 physical_start + logical, totalsize - textsize, 691 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 692 } 693 694 #ifdef VERBOSE_INIT_ARM 695 printf("Constructing L2 page tables\n"); 696 #endif 697 698 /* Map the stack pages */ 699 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 700 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 702 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 703 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 704 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 705 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 706 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 707 708 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 709 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 710 711 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 712 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 713 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 714 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 715 } 716 717 /* Map the vector page. */ 718 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 719 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 720 721 /* Map the statically mapped devices. */ 722 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 723 724 /* 725 * Update the physical_freestart/physical_freeend/free_pages 726 * variables. 727 */ 728 { 729 extern char _end[]; 730 731 physical_freestart = physical_start + 732 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 733 KERNEL_BASE); 734 physical_freeend = physical_end; 735 free_pages = 736 (physical_freeend - physical_freestart) / PAGE_SIZE; 737 } 738 739 /* 740 * Now we have the real page tables in place so we can switch to them. 741 * Once this is done we will be running with the REAL kernel page 742 * tables. 743 */ 744 745 /* Switch tables */ 746 #ifdef VERBOSE_INIT_ARM 747 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 748 physical_freestart, free_pages, free_pages); 749 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 750 #endif 751 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 752 cpu_setttb(kernel_l1pt.pv_pa, true); 753 cpu_tlb_flushID(); 754 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 755 756 /* 757 * Moved from cpu_startup() as data_abort_handler() references 758 * this during uvm init 759 */ 760 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 761 762 #ifdef VERBOSE_INIT_ARM 763 printf("done!\n"); 764 #endif 765 766 #ifdef VERBOSE_INIT_ARM 767 printf("bootstrap done.\n"); 768 #endif 769 770 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 771 772 /* 773 * Pages were allocated during the secondary bootstrap for the 774 * stacks for different CPU modes. 775 * We must now set the r13 registers in the different CPU modes to 776 * point to these stacks. 777 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 778 * of the stack memory. 779 */ 780 #ifdef VERBOSE_INIT_ARM 781 printf("init subsystems: stacks "); 782 #endif 783 784 set_stackptr(PSR_IRQ32_MODE, 785 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 786 set_stackptr(PSR_ABT32_MODE, 787 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 788 set_stackptr(PSR_UND32_MODE, 789 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 790 791 /* 792 * Well we should set a data abort handler. 793 * Once things get going this will change as we will need a proper 794 * handler. 795 * Until then we will use a handler that just panics but tells us 796 * why. 797 * Initialisation of the vectors will just panic on a data abort. 798 * This just fills in a slightly better one. 799 */ 800 #ifdef VERBOSE_INIT_ARM 801 printf("vectors "); 802 #endif 803 data_abort_handler_address = (u_int)data_abort_handler; 804 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 805 undefined_handler_address = (u_int)undefinedinstruction_bounce; 806 807 /* Initialise the undefined instruction handlers */ 808 #ifdef VERBOSE_INIT_ARM 809 printf("undefined "); 810 #endif 811 undefined_init(); 812 813 /* Load memory into UVM. */ 814 #ifdef VERBOSE_INIT_ARM 815 printf("page "); 816 #endif 817 uvm_md_init(); 818 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 819 atop(physical_freestart), atop(physical_freeend), 820 VM_FREELIST_DEFAULT); 821 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 822 atop(0xc0000000), atop(physical_freeend_low), 823 VM_FREELIST_DEFAULT); 824 physmem = bootconfig.dram[0].pages; 825 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 826 size_t start = bootconfig.dram[loop].address; 827 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 828 uvm_page_physload(atop(start), atop(start + size), 829 atop(start), atop(start + size), 830 VM_FREELIST_DEFAULT); 831 physmem += bootconfig.dram[loop].pages; 832 } 833 834 /* Boot strap pmap telling it where the kernel page table is */ 835 #ifdef VERBOSE_INIT_ARM 836 printf("pmap "); 837 #endif 838 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 839 840 /* Setup the IRQ system */ 841 #ifdef VERBOSE_INIT_ARM 842 printf("irq "); 843 #endif 844 ep93xx_intr_init(); 845 #if NISA > 0 846 isa_intr_init(); 847 848 #ifdef VERBOSE_INIT_ARM 849 printf("isa "); 850 #endif 851 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 852 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 853 #endif 854 855 #ifdef VERBOSE_INIT_ARM 856 printf("done.\n"); 857 #endif 858 859 #ifdef BOOTHOWTO 860 boothowto = BOOTHOWTO; 861 #endif 862 863 #ifdef DDB 864 db_machine_init(); 865 if (boothowto & RB_KDB) 866 Debugger(); 867 #endif 868 869 /* We have our own device_register() */ 870 evbarm_device_register = armadillo9_device_register; 871 872 /* We return the new stack pointer address */ 873 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 874 } 875 876 void 877 consinit(void) 878 { 879 static int consinit_called; 880 #if NEPCOM > 0 881 bus_space_handle_t ioh; 882 #endif 883 884 if (consinit_called != 0) 885 return; 886 887 consinit_called = 1; 888 889 /* 890 * Console devices are already mapped in VA. Our devmap reflects 891 * this, so register it now so drivers can map the console 892 * device. 893 */ 894 pmap_devmap_register(armadillo9_devmap); 895 896 #if NEPCOM > 0 897 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 898 EP93XX_APB_UART_SIZE, 0, &ioh); 899 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 900 ioh, comcnspeed, comcnmode)) 901 { 902 panic("can't init serial console"); 903 } 904 #else 905 panic("serial console not configured"); 906 #endif 907 #if KGDB 908 #if NEPCOM > 0 909 if (strcmp(kgdb_devname, "epcom") == 0) { 910 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 911 kgdb_devmode); 912 } 913 #endif /* NEPCOM > 0 */ 914 #endif /* KGDB */ 915 } 916 917 918 bus_dma_tag_t 919 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 920 { 921 int i; 922 struct arm32_bus_dma_tag *dmat; 923 924 for (i = 0; i < bootconfig.dramblocks; i++) { 925 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 926 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 927 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 928 PAGE_SIZE; 929 } 930 931 dmat = dma_tag_template; 932 933 dmat->_ranges = armadillo9_dma_ranges; 934 dmat->_nranges = bootconfig.dramblocks; 935 936 return dmat; 937 } 938
Indexes created Wed Oct 01 07:09:59 GMT 2025