1 /* $NetBSD: armadillo9_machdep.c,v 1.41 2024/02/20 23:36:02 andvar 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 1.41 2024/02/20 23:36:02 andvar Exp $"); 114 115 #include "opt_arm_debug.h" 116 #include "opt_console.h" 117 #include "opt_ddb.h" 118 #include "opt_kgdb.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 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 224 225 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 226 #define KERNEL_PT_KERNEL_NUM 4 227 /* L2 tables for mapping kernel VM */ 228 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 229 230 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 231 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 232 233 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 234 235 /* Prototypes */ 236 237 void consinit(void); 238 /* 239 * Define the default console speed for the machine. 240 */ 241 #if NEPCOM > 0 242 #ifndef CONSPEED 243 #define CONSPEED B115200 244 #endif /* ! CONSPEED */ 245 246 #ifndef CONMODE 247 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 248 #endif 249 250 #ifndef CONUNIT 251 #define CONUNIT 0 252 #endif 253 254 int comcnspeed = CONSPEED; 255 int comcnmode = CONMODE; 256 const unsigned long comaddr[] = { 257 EP93XX_APB_UART1, EP93XX_APB_UART2 }; 258 #endif 259 260 #if KGDB 261 #ifndef KGDB_DEVNAME 262 #error Must define KGDB_DEVNAME 263 #endif 264 const char kgdb_devname[] = KGDB_DEVNAME; 265 266 #ifndef KGDB_DEVADDR 267 #error Must define KGDB_DEVADDR 268 #endif 269 unsigned long kgdb_devaddr = KGDB_DEVADDR; 270 271 #ifndef KGDB_DEVRATE 272 #define KGDB_DEVRATE CONSPEED 273 #endif 274 int kgdb_devrate = KGDB_DEVRATE; 275 276 #ifndef KGDB_DEVMODE 277 #define KGDB_DEVMODE CONMODE 278 #endif 279 int kgdb_devmode = KGDB_DEVMODE; 280 #endif /* KGDB */ 281 282 /* 283 * MAC address for the built-in Ethernet. 284 */ 285 uint8_t armadillo9_ethaddr[ETHER_ADDR_LEN]; 286 287 static void 288 armadillo9_device_register(device_t dev, void *aux) 289 { 290 291 /* MAC address for the built-in Ethernet. */ 292 if (device_is_a(dev, "epe")) { 293 prop_data_t pd = prop_data_create_data_nocopy( 294 armadillo9_ethaddr, ETHER_ADDR_LEN); 295 KASSERT(pd != NULL); 296 if (prop_dictionary_set(device_properties(dev), 297 "mac-address", pd) == false) { 298 printf("WARNING: unable to set mac-addr property " 299 "for %s\n", device_xname(dev)); 300 } 301 prop_object_release(pd); 302 } 303 } 304 305 /* 306 * void cpu_reboot(int howto, char *bootstr) 307 * 308 * Reboots the system 309 * 310 * Deal with any syncing, unmounting, dumping and shutdown hooks, 311 * then reset the CPU. 312 */ 313 void 314 cpu_reboot(int howto, char *bootstr) 315 { 316 /* 317 * If we are still cold then hit the air brakes 318 * and crash to earth fast 319 */ 320 if (cold) { 321 doshutdownhooks(); 322 pmf_system_shutdown(boothowto); 323 printf("\r\n"); 324 printf("The operating system has halted.\r\n"); 325 printf("Please press any key to reboot.\r\n"); 326 cngetc(); 327 printf("\r\nrebooting...\r\n"); 328 goto reset; 329 } 330 331 /* Disable console buffering */ 332 333 /* 334 * If RB_NOSYNC was not specified sync the discs. 335 * Note: Unless cold is set to 1 here, syslogd will die during the 336 * unmount. It looks like syslogd is getting woken up only to find 337 * that it cannot page part of the binary in as the filesystem has 338 * been unmounted. 339 */ 340 if (!(howto & RB_NOSYNC)) 341 bootsync(); 342 343 /* Say NO to interrupts */ 344 splhigh(); 345 346 /* Do a dump if requested. */ 347 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 348 dumpsys(); 349 350 /* Run any shutdown hooks */ 351 doshutdownhooks(); 352 353 pmf_system_shutdown(boothowto); 354 355 /* Make sure IRQ's are disabled */ 356 IRQdisable; 357 358 if (howto & RB_HALT) { 359 printf("\r\n"); 360 printf("The operating system has halted.\r\n"); 361 printf("Please press any key to reboot.\r\n"); 362 cngetc(); 363 } 364 365 printf("\r\nrebooting...\r\n"); 366 reset: 367 /* 368 * Make really really sure that all interrupts are disabled, 369 * and poke the Internal Bus and Peripheral Bus reset lines. 370 */ 371 (void) disable_interrupts(I32_bit|F32_bit); 372 #if NEPWDOG > 0 373 epwdog_reset(); 374 #else 375 { 376 uint32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 377 uint32_t val = EP93XX_WDOG_ENABLE; 378 __asm volatile ( 379 "str %1, [%0]\n" 380 : 381 : "r" (ctrl), "r" (val) 382 ); 383 } 384 #endif 385 for (;;); 386 } 387 388 /* Static device mappings. */ 389 static const struct pmap_devmap armadillo9_devmap[] = { 390 { 391 EP93XX_AHB_VBASE, 392 EP93XX_AHB_HWBASE, 393 EP93XX_AHB_SIZE, 394 VM_PROT_READ|VM_PROT_WRITE, 395 PTE_NOCACHE, 396 }, 397 398 { 399 EP93XX_APB_VBASE, 400 EP93XX_APB_HWBASE, 401 EP93XX_APB_SIZE, 402 VM_PROT_READ|VM_PROT_WRITE, 403 PTE_NOCACHE, 404 }, 405 406 { 407 EP93XX_PCMCIA0_VBASE, 408 EP93XX_PCMCIA0_HWBASE, 409 EP93XX_PCMCIA_SIZE, 410 VM_PROT_READ|VM_PROT_WRITE, 411 PTE_NOCACHE, 412 }, 413 414 /* 415 * IO8 and IO16 space *must* be mapped contiguously with 416 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 417 * on that! 418 */ 419 { 420 ARMADILLO9_IO8_VBASE, 421 ARMADILLO9_IO8_HWBASE, 422 ARMADILLO9_IO8_SIZE, 423 VM_PROT_READ|VM_PROT_WRITE, 424 PTE_NOCACHE, 425 }, 426 427 { 428 ARMADILLO9_IO16_VBASE, 429 ARMADILLO9_IO16_HWBASE, 430 ARMADILLO9_IO16_SIZE, 431 VM_PROT_READ|VM_PROT_WRITE, 432 PTE_NOCACHE, 433 }, 434 435 { 436 0, 437 0, 438 0, 439 0, 440 0, 441 } 442 }; 443 444 /* 445 * vaddr_t initarm(...) 446 * 447 * Initial entry point on startup. This gets called before main() is 448 * entered. 449 * It should be responsible for setting up everything that must be 450 * in place when main is called. 451 * This includes 452 * Taking a copy of the boot configuration structure. 453 * Initialising the physical console so characters can be printed. 454 * Setting up page tables for the kernel 455 * Initialising interrupt controllers to a sane default state 456 */ 457 vaddr_t 458 initarm(void *arg) 459 { 460 int loop; 461 int loop1; 462 u_int l1pagetable; 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 availability 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: 0x%"PRIxPSIZE" pages at " 548 "0x%08"PRIxPADDR" -> 0x%08"PRIxPADDR"\n", 549 physmem, physical_start, physical_end - 1); 550 #endif 551 552 /* 553 * Okay, the kernel starts 2MB in from the bottom of physical 554 * memory. We are going to allocate our bootstrap pages downwards 555 * from there. 556 * 557 * We need to allocate some fixed page tables to get the kernel 558 * going. We allocate one page directory and a number of page 559 * tables and store the physical addresses in the kernel_pt_table 560 * array. 561 * 562 * The kernel page directory must be on a 16K boundary. The page 563 * tables must be on 4K boundaries. What we do is allocate the 564 * page directory on the first 16K boundary that we encounter, and 565 * the page tables on 4K boundaries otherwise. Since we allocate 566 * at least 3 L2 page tables, we are guaranteed to encounter at 567 * least one 16K aligned region. 568 */ 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Allocating page tables\n"); 572 #endif 573 574 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 578 physical_freestart, free_pages, free_pages); 579 #endif 580 581 /* Define a macro to simplify memory allocation */ 582 #define valloc_pages(var, np) \ 583 alloc_pages((var).pv_pa, (np)); \ 584 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 585 586 #define alloc_pages(var, np) \ 587 physical_freeend -= ((np) * PAGE_SIZE); \ 588 if (physical_freeend < physical_freestart) \ 589 panic("initarm: out of memory"); \ 590 (var) = physical_freeend; \ 591 free_pages -= (np); \ 592 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 593 594 loop1 = 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 cpu_setttb(kernel_l1pt.pv_pa, true); 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 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 758 759 #ifdef VERBOSE_INIT_ARM 760 printf("done!\n"); 761 #endif 762 763 #ifdef VERBOSE_INIT_ARM 764 printf("bootstrap done.\n"); 765 #endif 766 767 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 768 769 /* 770 * Pages were allocated during the secondary bootstrap for the 771 * stacks for different CPU modes. 772 * We must now set the r13 registers in the different CPU modes to 773 * point to these stacks. 774 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 775 * of the stack memory. 776 */ 777 #ifdef VERBOSE_INIT_ARM 778 printf("init subsystems: stacks "); 779 #endif 780 781 set_stackptr(PSR_IRQ32_MODE, 782 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 783 set_stackptr(PSR_ABT32_MODE, 784 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 785 set_stackptr(PSR_UND32_MODE, 786 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 787 788 /* 789 * Well we should set a data abort handler. 790 * Once things get going this will change as we will need a proper 791 * handler. 792 * Until then we will use a handler that just panics but tells us 793 * why. 794 * Initialisation of the vectors will just panic on a data abort. 795 * This just fills in a slightly better one. 796 */ 797 #ifdef VERBOSE_INIT_ARM 798 printf("vectors "); 799 #endif 800 data_abort_handler_address = (u_int)data_abort_handler; 801 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 802 undefined_handler_address = (u_int)undefinedinstruction_bounce; 803 804 /* Initialise the undefined instruction handlers */ 805 #ifdef VERBOSE_INIT_ARM 806 printf("undefined "); 807 #endif 808 undefined_init(); 809 810 /* Load memory into UVM. */ 811 #ifdef VERBOSE_INIT_ARM 812 printf("page "); 813 #endif 814 uvm_md_init(); 815 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 816 atop(physical_freestart), atop(physical_freeend), 817 VM_FREELIST_DEFAULT); 818 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 819 atop(0xc0000000), atop(physical_freeend_low), 820 VM_FREELIST_DEFAULT); 821 physmem = bootconfig.dram[0].pages; 822 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 823 size_t start = bootconfig.dram[loop].address; 824 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 825 uvm_page_physload(atop(start), atop(start + size), 826 atop(start), atop(start + size), 827 VM_FREELIST_DEFAULT); 828 physmem += bootconfig.dram[loop].pages; 829 } 830 831 /* Boot strap pmap telling it where managed kernel virtual memory is */ 832 #ifdef VERBOSE_INIT_ARM 833 printf("pmap "); 834 #endif 835 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 836 837 /* Setup the IRQ system */ 838 #ifdef VERBOSE_INIT_ARM 839 printf("irq "); 840 #endif 841 ep93xx_intr_init(); 842 #if NISA > 0 843 isa_intr_init(); 844 845 #ifdef VERBOSE_INIT_ARM 846 printf("isa "); 847 #endif 848 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 849 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 850 #endif 851 852 #ifdef VERBOSE_INIT_ARM 853 printf("done.\n"); 854 #endif 855 856 #ifdef BOOTHOWTO 857 boothowto = BOOTHOWTO; 858 #endif 859 860 #ifdef DDB 861 db_machine_init(); 862 if (boothowto & RB_KDB) 863 Debugger(); 864 #endif 865 866 /* We have our own device_register() */ 867 evbarm_device_register = armadillo9_device_register; 868 869 /* We return the new stack pointer address */ 870 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 871 } 872 873 void 874 consinit(void) 875 { 876 static int consinit_called; 877 #if NEPCOM > 0 878 bus_space_handle_t ioh; 879 #endif 880 881 if (consinit_called != 0) 882 return; 883 884 consinit_called = 1; 885 886 /* 887 * Console devices are already mapped in VA. Our devmap reflects 888 * this, so register it now so drivers can map the console 889 * device. 890 */ 891 pmap_devmap_register(armadillo9_devmap); 892 893 #if NEPCOM > 0 894 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 895 EP93XX_APB_UART_SIZE, 0, &ioh); 896 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + comaddr[CONUNIT], 897 ioh, comcnspeed, comcnmode)) 898 { 899 panic("can't init serial console"); 900 } 901 #else 902 panic("serial console not configured"); 903 #endif 904 #if KGDB 905 #if NEPCOM > 0 906 if (strcmp(kgdb_devname, "epcom") == 0) { 907 epcom_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 908 kgdb_devmode); 909 } 910 #endif /* NEPCOM > 0 */ 911 #endif /* KGDB */ 912 } 913 914 915 bus_dma_tag_t 916 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 917 { 918 int i; 919 struct arm32_bus_dma_tag *dmat; 920 921 for (i = 0; i < bootconfig.dramblocks; i++) { 922 armadillo9_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 923 armadillo9_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 924 armadillo9_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 925 PAGE_SIZE; 926 } 927 928 dmat = dma_tag_template; 929 930 dmat->_ranges = armadillo9_dma_ranges; 931 dmat->_nranges = bootconfig.dramblocks; 932 933 return dmat; 934 } 935
Indexes created Wed Sep 24 05:09:52 GMT 2025