armadillo9_machdep.c revision 1.3
1 /* $NetBSD: armadillo9_machdep.c,v 1.3 2006/02/06 14:03:22 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 1.3 2006/02/06 14:03:22 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 #ifdef ARMADILLO210 139 #define DRAM_BLOCKS 4 140 #endif 141 #include <machine/bootconfig.h> 142 #include <machine/bus.h> 143 #include <machine/cpu.h> 144 #include <machine/frame.h> 145 #include <arm/undefined.h> 146 147 #include <arm/arm32/machdep.h> 148 149 #include <arm/ep93xx/ep93xxreg.h> 150 #include <arm/ep93xx/ep93xxvar.h> 151 152 #include "epwdog.h" 153 #if NEPWDOG > 0 154 #include <arm/ep93xx/epwdogvar.h> 155 #endif 156 #include <arm/ep93xx/epwdogreg.h> 157 158 #include <dev/ic/comreg.h> 159 #include <dev/ic/comvar.h> 160 161 #include "epcom.h" 162 #if NEPCOM > 0 163 #include <arm/ep93xx/epcomvar.h> 164 #endif 165 166 #include "isa.h" 167 #if NISA > 0 168 #include <dev/isa/isareg.h> 169 #include <dev/isa/isavar.h> 170 #endif 171 172 #include <machine/isa_machdep.h> 173 174 #include <evbarm/armadillo/armadillo9reg.h> 175 176 #include "opt_ipkdb.h" 177 #include "ksyms.h" 178 179 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 180 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 181 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 182 183 /* 184 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 185 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 186 */ 187 #define KERNEL_VM_SIZE 0x0c000000 188 189 /* 190 * Address to call from cpu_reset() to reset the machine. 191 * This is machine architecture dependant as it varies depending 192 * on where the ROM appears when you turn the MMU off. 193 */ 194 195 u_int cpu_reset_address = 0x80090000; 196 197 /* Define various stack sizes in pages */ 198 #define IRQ_STACK_SIZE 8 199 #define ABT_STACK_SIZE 8 200 #ifdef IPKDB 201 #define UND_STACK_SIZE 16 202 #else 203 #define UND_STACK_SIZE 8 204 #endif 205 206 BootConfig bootconfig; /* Boot config storage */ 207 char *boot_args = NULL; 208 char *boot_file = NULL; 209 210 vm_offset_t physical_start; 211 vm_offset_t physical_freestart; 212 vm_offset_t physical_freeend; 213 vm_offset_t physical_freeend_low; 214 vm_offset_t physical_end; 215 u_int free_pages; 216 int physmem = 0; 217 218 /* Physical and virtual addresses for some global pages */ 219 pv_addr_t systempage; 220 pv_addr_t irqstack; 221 pv_addr_t undstack; 222 pv_addr_t abtstack; 223 pv_addr_t kernelstack; 224 225 vm_offset_t msgbufphys; 226 227 static struct arm32_dma_range armadillo9_dma_ranges[4]; 228 229 #if NISA > 0 230 extern void isa_armadillo9_init(u_int, u_int); 231 #endif 232 233 extern u_int data_abort_handler_address; 234 extern u_int prefetch_abort_handler_address; 235 extern u_int undefined_handler_address; 236 237 #ifdef PMAP_DEBUG 238 extern int pmap_debug_level; 239 #endif 240 241 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 242 243 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 244 #define KERNEL_PT_KERNEL_NUM 4 245 /* L2 tables for mapping kernel VM */ 246 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 247 248 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 249 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 250 251 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 252 253 struct user *proc0paddr; 254 255 /* Prototypes */ 256 257 void consinit(void); 258 /* 259 * Define the default console speed for the machine. 260 */ 261 #ifndef CONSPEED 262 #define CONSPEED B115200 263 #endif /* ! CONSPEED */ 264 265 #ifndef CONMODE 266 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 267 #endif 268 269 int comcnspeed = CONSPEED; 270 int comcnmode = CONMODE; 271 272 #if KGDB 273 #ifndef KGDB_DEVNAME 274 #error Must define KGDB_DEVNAME 275 #endif 276 const char kgdb_devname[] = KGDB_DEVNAME; 277 278 #ifndef KGDB_DEVADDR 279 #error Must define KGDB_DEVADDR 280 #endif 281 unsigned long kgdb_devaddr = KGDB_DEVADDR; 282 283 #ifndef KGDB_DEVRATE 284 #define KGDB_DEVRATE CONSPEED 285 #endif 286 int kgdb_devrate = KGDB_DEVRATE; 287 288 #ifndef KGDB_DEVMODE 289 #define KGDB_DEVMODE CONMODE 290 #endif 291 int kgdb_devmode = KGDB_DEVMODE; 292 #endif /* KGDB */ 293 294 /* 295 * void cpu_reboot(int howto, char *bootstr) 296 * 297 * Reboots the system 298 * 299 * Deal with any syncing, unmounting, dumping and shutdown hooks, 300 * then reset the CPU. 301 */ 302 void 303 cpu_reboot(int howto, char *bootstr) 304 { 305 /* 306 * If we are still cold then hit the air brakes 307 * and crash to earth fast 308 */ 309 if (cold) { 310 doshutdownhooks(); 311 printf("\r\n"); 312 printf("The operating system has halted.\r\n"); 313 printf("Please press any key to reboot.\r\n"); 314 cngetc(); 315 printf("\r\nrebooting...\r\n"); 316 goto reset; 317 } 318 319 /* Disable console buffering */ 320 321 /* 322 * If RB_NOSYNC was not specified sync the discs. 323 * Note: Unless cold is set to 1 here, syslogd will die during the 324 * unmount. It looks like syslogd is getting woken up only to find 325 * that it cannot page part of the binary in as the filesystem has 326 * been unmounted. 327 */ 328 if (!(howto & RB_NOSYNC)) 329 bootsync(); 330 331 /* Say NO to interrupts */ 332 splhigh(); 333 334 /* Do a dump if requested. */ 335 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 336 dumpsys(); 337 338 /* Run any shutdown hooks */ 339 doshutdownhooks(); 340 341 /* Make sure IRQ's are disabled */ 342 IRQdisable; 343 344 if (howto & RB_HALT) { 345 printf("\r\n"); 346 printf("The operating system has halted.\r\n"); 347 printf("Please press any key to reboot.\r\n"); 348 cngetc(); 349 } 350 351 printf("\r\nrebooting...\r\n"); 352 reset: 353 /* 354 * Make really really sure that all interrupts are disabled, 355 * and poke the Internal Bus and Peripheral Bus reset lines. 356 */ 357 (void) disable_interrupts(I32_bit|F32_bit); 358 #if NEPWDOG > 0 359 epwdog_reset(); 360 #else 361 { 362 u_int32_t ctrl = EP93XX_APB_VBASE + EP93XX_APB_WDOG + EP93XX_WDOG_Ctrl; 363 u_int32_t val = EP93XX_WDOG_ENABLE; 364 __asm volatile ( 365 "str %1, [%0]\n" 366 : 367 : "r" (ctrl), "r" (val) 368 ); 369 } 370 #endif 371 for (;;); 372 } 373 374 /* Static device mappings. */ 375 static const struct pmap_devmap armadillo9_devmap[] = { 376 { 377 EP93XX_AHB_VBASE, 378 EP93XX_AHB_HWBASE, 379 EP93XX_AHB_SIZE, 380 VM_PROT_READ|VM_PROT_WRITE, 381 PTE_NOCACHE, 382 }, 383 384 { 385 EP93XX_APB_VBASE, 386 EP93XX_APB_HWBASE, 387 EP93XX_APB_SIZE, 388 VM_PROT_READ|VM_PROT_WRITE, 389 PTE_NOCACHE, 390 }, 391 392 { 393 EP93XX_PCMCIA0_VBASE, 394 EP93XX_PCMCIA0_HWBASE, 395 EP93XX_PCMCIA_SIZE, 396 VM_PROT_READ|VM_PROT_WRITE, 397 PTE_NOCACHE, 398 }, 399 400 /* 401 * IO8 and IO16 space *must* be mapped contiguously with 402 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 403 * on that! 404 */ 405 { 406 ARMADILLO9_IO8_VBASE, 407 ARMADILLO9_IO8_HWBASE, 408 ARMADILLO9_IO8_SIZE, 409 VM_PROT_READ|VM_PROT_WRITE, 410 PTE_NOCACHE, 411 }, 412 413 { 414 ARMADILLO9_IO16_VBASE, 415 ARMADILLO9_IO16_HWBASE, 416 ARMADILLO9_IO16_SIZE, 417 VM_PROT_READ|VM_PROT_WRITE, 418 PTE_NOCACHE, 419 }, 420 421 { 422 0, 423 0, 424 0, 425 0, 426 0, 427 } 428 }; 429 430 /* 431 * u_int initarm(...) 432 * 433 * Initial entry point on startup. This gets called before main() is 434 * entered. 435 * It should be responsible for setting up everything that must be 436 * in place when main is called. 437 * This includes 438 * Taking a copy of the boot configuration structure. 439 * Initialising the physical console so characters can be printed. 440 * Setting up page tables for the kernel 441 * Initialising interrupt controllers to a sane default state 442 */ 443 u_int 444 initarm(void *arg) 445 { 446 int loop; 447 int loop1; 448 u_int l1pagetable; 449 pv_addr_t kernel_l1pt; 450 451 /* 452 * Since we map the on-board devices VA==PA, and the kernel 453 * is running VA==PA, it's possible for us to initialize 454 * the console now. 455 */ 456 consinit(); 457 458 #ifdef VERBOSE_INIT_ARM 459 /* Talk to the user */ 460 printf("\nNetBSD/armadillo9 booting ...\n"); 461 #endif 462 463 /* 464 * Heads up ... Setup the CPU / MMU / TLB functions 465 */ 466 if (set_cpufuncs()) 467 panic("cpu not recognized!"); 468 469 #ifdef VERBOSE_INIT_ARM 470 printf("initarm: Configuring system ...\n"); 471 #endif 472 473 /* Fake bootconfig structure for the benefit of pmap.c */ 474 /* XXX must make the memory description h/w independant */ 475 #ifdef ARMADILLO210 476 bootconfig.dramblocks = 4; 477 bootconfig.dram[0].address = 0xc0000000UL; 478 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 479 bootconfig.dram[1].address = 0xc1000000UL; 480 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 481 bootconfig.dram[2].address = 0xc4000000UL; 482 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 483 bootconfig.dram[3].address = 0xc5000000UL; 484 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 485 #else /* ARMADILLO9 */ 486 bootconfig.dramblocks = 2; 487 bootconfig.dram[0].address = 0xc0000000UL; 488 bootconfig.dram[0].pages = 0x2000000UL / PAGE_SIZE; 489 bootconfig.dram[1].address = 0xc4000000UL; 490 bootconfig.dram[1].pages = 0x2000000UL / PAGE_SIZE; 491 #endif 492 493 /* 494 * Set up the variables that define the availablilty of 495 * physical memory. For now, we're going to set 496 * physical_freestart to 0xc0200000 (where the kernel 497 * was loaded), and allocate the memory we need downwards. 498 * If we get too close to the L1 table that we set up, we 499 * will panic. We will update physical_freestart and 500 * physical_freeend later to reflect what pmap_bootstrap() 501 * wants to see. 502 * 503 * XXX pmap_bootstrap() needs an enema. 504 */ 505 physical_start = bootconfig.dram[0].address; 506 physical_end = bootconfig.dram[0].address 507 + (bootconfig.dram[0].pages * PAGE_SIZE); 508 509 physical_freestart = 0xc0018000UL; 510 physical_freeend = 0xc0200000UL; 511 512 physmem = (physical_end - physical_start) / PAGE_SIZE; 513 514 #ifdef VERBOSE_INIT_ARM 515 /* Tell the user about the memory */ 516 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 517 physical_start, physical_end - 1); 518 #endif 519 520 /* 521 * Okay, the kernel starts 2MB in from the bottom of physical 522 * memory. We are going to allocate our bootstrap pages downwards 523 * from there. 524 * 525 * We need to allocate some fixed page tables to get the kernel 526 * going. We allocate one page directory and a number of page 527 * tables and store the physical addresses in the kernel_pt_table 528 * array. 529 * 530 * The kernel page directory must be on a 16K boundary. The page 531 * tables must be on 4K bounaries. What we do is allocate the 532 * page directory on the first 16K boundary that we encounter, and 533 * the page tables on 4K boundaries otherwise. Since we allocate 534 * at least 3 L2 page tables, we are guaranteed to encounter at 535 * least one 16K aligned region. 536 */ 537 538 #ifdef VERBOSE_INIT_ARM 539 printf("Allocating page tables\n"); 540 #endif 541 542 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 546 physical_freestart, free_pages, free_pages); 547 #endif 548 549 /* Define a macro to simplify memory allocation */ 550 #define valloc_pages(var, np) \ 551 alloc_pages((var).pv_pa, (np)); \ 552 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 553 554 #define alloc_pages(var, np) \ 555 physical_freeend -= ((np) * PAGE_SIZE); \ 556 if (physical_freeend < physical_freestart) \ 557 panic("initarm: out of memory"); \ 558 (var) = physical_freeend; \ 559 free_pages -= (np); \ 560 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 561 562 loop1 = 0; 563 kernel_l1pt.pv_pa = 0; 564 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 565 /* Are we 16KB aligned for an L1 ? */ 566 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 567 && kernel_l1pt.pv_pa == 0) { 568 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 569 } else { 570 valloc_pages(kernel_pt_table[loop1], 571 L2_TABLE_SIZE / PAGE_SIZE); 572 ++loop1; 573 } 574 } 575 576 /* This should never be able to happen but better confirm that. */ 577 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 578 panic("initarm: Failed to align the kernel page directory"); 579 580 /* 581 * Allocate a page for the system vectors page 582 */ 583 alloc_pages(systempage.pv_pa, 1); 584 585 /* Allocate stacks for all modes */ 586 valloc_pages(irqstack, IRQ_STACK_SIZE); 587 valloc_pages(abtstack, ABT_STACK_SIZE); 588 valloc_pages(undstack, UND_STACK_SIZE); 589 valloc_pages(kernelstack, UPAGES); 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 593 irqstack.pv_va); 594 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 595 abtstack.pv_va); 596 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 597 undstack.pv_va); 598 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 599 kernelstack.pv_va); 600 #endif 601 602 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 603 604 /* 605 * Ok we have allocated physical pages for the primary kernel 606 * page tables. Save physical_freeend for when we give whats left 607 * of memory below 2Mbyte to UVM. 608 */ 609 610 physical_freeend_low = physical_freeend; 611 612 #ifdef VERBOSE_INIT_ARM 613 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 614 #endif 615 616 /* 617 * Now we start construction of the L1 page table 618 * We start by mapping the L2 page tables into the L1. 619 * This means that we can replace L1 mappings later on if necessary 620 */ 621 l1pagetable = kernel_l1pt.pv_pa; 622 623 /* Map the L2 pages tables in the L1 page table */ 624 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 625 &kernel_pt_table[KERNEL_PT_SYS]); 626 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 627 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 628 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 629 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 630 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 631 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 632 633 /* update the top of the kernel VM */ 634 pmap_curmaxkvaddr = 635 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 636 637 #ifdef VERBOSE_INIT_ARM 638 printf("Mapping kernel\n"); 639 #endif 640 641 /* Now we fill in the L2 pagetable for the kernel static code/data */ 642 { 643 extern char etext[], _end[]; 644 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 645 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 646 u_int logical; 647 648 textsize = (textsize + PGOFSET) & ~PGOFSET; 649 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 650 651 logical = 0x00200000; /* offset of kernel in RAM */ 652 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 653 physical_start + logical, textsize, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 656 physical_start + logical, totalsize - textsize, 657 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 658 } 659 660 #ifdef VERBOSE_INIT_ARM 661 printf("Constructing L2 page tables\n"); 662 #endif 663 664 /* Map the stack pages */ 665 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 666 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 667 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 668 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 669 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 670 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 671 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 672 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 673 674 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 675 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 676 677 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 678 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 679 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 680 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 681 } 682 683 /* Map the vector page. */ 684 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 685 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 686 687 /* Map the statically mapped devices. */ 688 pmap_devmap_bootstrap(l1pagetable, armadillo9_devmap); 689 690 /* 691 * Update the physical_freestart/physical_freeend/free_pages 692 * variables. 693 */ 694 { 695 extern char _end[]; 696 697 physical_freestart = physical_start + 698 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 699 KERNEL_BASE); 700 physical_freeend = physical_end; 701 free_pages = 702 (physical_freeend - physical_freestart) / PAGE_SIZE; 703 } 704 705 /* 706 * Now we have the real page tables in place so we can switch to them. 707 * Once this is done we will be running with the REAL kernel page 708 * tables. 709 */ 710 711 /* Switch tables */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 714 physical_freestart, free_pages, free_pages); 715 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 716 #endif 717 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 718 setttb(kernel_l1pt.pv_pa); 719 cpu_tlb_flushID(); 720 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 721 722 /* 723 * Moved from cpu_startup() as data_abort_handler() references 724 * this during uvm init 725 */ 726 proc0paddr = (struct user *)kernelstack.pv_va; 727 lwp0.l_addr = proc0paddr; 728 729 #ifdef VERBOSE_INIT_ARM 730 printf("done!\n"); 731 #endif 732 733 #ifdef VERBOSE_INIT_ARM 734 printf("bootstrap done.\n"); 735 #endif 736 737 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 738 739 /* 740 * Pages were allocated during the secondary bootstrap for the 741 * stacks for different CPU modes. 742 * We must now set the r13 registers in the different CPU modes to 743 * point to these stacks. 744 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 745 * of the stack memory. 746 */ 747 #ifdef VERBOSE_INIT_ARM 748 printf("init subsystems: stacks "); 749 #endif 750 751 set_stackptr(PSR_IRQ32_MODE, 752 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 753 set_stackptr(PSR_ABT32_MODE, 754 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 755 set_stackptr(PSR_UND32_MODE, 756 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 757 758 /* 759 * Well we should set a data abort handler. 760 * Once things get going this will change as we will need a proper 761 * handler. 762 * Until then we will use a handler that just panics but tells us 763 * why. 764 * Initialisation of the vectors will just panic on a data abort. 765 * This just fills in a slightly better one. 766 */ 767 #ifdef VERBOSE_INIT_ARM 768 printf("vectors "); 769 #endif 770 data_abort_handler_address = (u_int)data_abort_handler; 771 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 772 undefined_handler_address = (u_int)undefinedinstruction_bounce; 773 774 /* Initialise the undefined instruction handlers */ 775 #ifdef VERBOSE_INIT_ARM 776 printf("undefined "); 777 #endif 778 undefined_init(); 779 780 /* Load memory into UVM. */ 781 #ifdef VERBOSE_INIT_ARM 782 printf("page "); 783 #endif 784 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 785 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 786 atop(physical_freestart), atop(physical_freeend), 787 VM_FREELIST_DEFAULT); 788 uvm_page_physload(atop(0xc0000000), atop(physical_freeend_low), 789 atop(0xc0000000), atop(physical_freeend_low), 790 VM_FREELIST_DEFAULT); 791 physmem = bootconfig.dram[0].pages; 792 for (loop = 1; loop < bootconfig.dramblocks; ++loop) { 793 size_t start = bootconfig.dram[loop].address; 794 size_t size = bootconfig.dram[loop].pages * PAGE_SIZE; 795 uvm_page_physload(atop(start), atop(start + size), 796 atop(start), atop(start + size), 797 VM_FREELIST_DEFAULT); 798 physmem += bootconfig.dram[loop].pages; 799 } 800 801 /* Boot strap pmap telling it where the kernel page table is */ 802 #ifdef VERBOSE_INIT_ARM 803 printf("pmap "); 804 #endif 805 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 806 KERNEL_VM_BASE + KERNEL_VM_SIZE); 807 808 /* Setup the IRQ system */ 809 #ifdef VERBOSE_INIT_ARM 810 printf("irq "); 811 #endif 812 ep93xx_intr_init(); 813 #if NISA > 0 814 isa_intr_init(); 815 816 #ifdef VERBOSE_INIT_ARM 817 printf("isa "); 818 #endif 819 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 820 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 821 #endif 822 823 #ifdef VERBOSE_INIT_ARM 824 printf("done.\n"); 825 #endif 826 827 #ifdef BOOTHOWTO 828 boothowto = BOOTHOWTO; 829 #endif 830 831 #ifdef IPKDB 832 /* Initialise ipkdb */ 833 ipkdb_init(); 834 if (boothowto & RB_KDB) 835 ipkdb_connect(0); 836 #endif 837 838 #if NKSYMS || defined(DDB) || defined(LKM) 839 /* Firmware doesn't load symbols. */ 840 ksyms_init(0, NULL, NULL); 841 #endif 842 843 #ifdef DDB 844 db_machine_init(); 845 if (boothowto & RB_KDB) 846 Debugger(); 847 #endif 848 849 /* We return the new stack pointer address */ 850 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 851 } 852 853 void 854 consinit(void) 855 { 856 static int consinit_called; 857 #if NEPCOM > 0 858 bus_space_handle_t ioh; 859 #endif 860 861 if (consinit_called != 0) 862 return; 863 864 consinit_called = 1; 865 866 /* 867 * Console devices are already mapped in VA. Our devmap reflects 868 * this, so register it now so drivers can map the console 869 * device. 870 */ 871 pmap_devmap_register(armadillo9_devmap); 872 #if 0 873 isa_armadillo9_init(ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAIO, 874 ARMADILLO9_IO16_VBASE + ARMADILLO9_ISAMEM); 875 876 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 877 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 878 { 879 panic("can't init serial console"); 880 } 881 #endif 882 883 #if NEPCOM > 0 884 #ifndef CONUNIT 885 #define CONUNIT 0 886 #endif 887 #if CONUNIT == 0 888 #define UART EP93XX_APB_UART1 889 #elif CONUNIT == 1 890 #define UART EP93XX_APB_UART2 891 #elif CONUNIT == 2 892 #define UART EP93XX_APB_UART3 893 #else 894 #error CONUNIT must less than 3. 895 #endif 896 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + UART, 897 EP93XX_APB_UART_SIZE, 0, &ioh); 898 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + UART, 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 Mon Sep 29 21:09:56 GMT 2025