tsarm_machdep.c revision 1.8
1 /* $NetBSD: tsarm_machdep.c,v 1.8 2008/11/11 06:46:41 dyoung 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 Iyonix. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: tsarm_machdep.c,v 1.8 2008/11/11 06:46:41 dyoung Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 #include "opt_pmap_debug.h" 81 82 #include <sys/param.h> 83 #include <sys/device.h> 84 #include <sys/systm.h> 85 #include <sys/kernel.h> 86 #include <sys/exec.h> 87 #include <sys/proc.h> 88 #include <sys/msgbuf.h> 89 #include <sys/reboot.h> 90 #include <sys/termios.h> 91 #include <sys/ksyms.h> 92 93 #include <uvm/uvm_extern.h> 94 95 #include <dev/cons.h> 96 97 #include <machine/db_machdep.h> 98 #include <ddb/db_sym.h> 99 #include <ddb/db_extern.h> 100 101 #include <acorn32/include/bootconfig.h> 102 #include <machine/bus.h> 103 #include <machine/cpu.h> 104 #include <machine/frame.h> 105 #include <arm/undefined.h> 106 107 #include <arm/arm32/machdep.h> 108 109 #include <arm/ep93xx/ep93xxreg.h> 110 #include <arm/ep93xx/ep93xxvar.h> 111 112 #include <dev/ic/comreg.h> 113 #include <dev/ic/comvar.h> 114 115 #include "epcom.h" 116 #if NEPCOM > 0 117 #include <arm/ep93xx/epcomvar.h> 118 #endif 119 120 #include "isa.h" 121 #if NISA > 0 122 #include <dev/isa/isareg.h> 123 #include <dev/isa/isavar.h> 124 #endif 125 126 #include <machine/isa_machdep.h> 127 128 #include <evbarm/tsarm/tsarmreg.h> 129 130 #include "ksyms.h" 131 132 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 133 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 134 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 135 136 /* 137 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 138 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 139 */ 140 #define KERNEL_VM_SIZE 0x0C000000 141 142 /* 143 * Address to call from cpu_reset() to reset the machine. 144 * This is machine architecture dependant as it varies depending 145 * on where the ROM appears when you turn the MMU off. 146 */ 147 148 u_int cpu_reset_address = 0x00000000; 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 struct bootconfig bootconfig; /* Boot config storage */ 156 char *boot_args = NULL; 157 char *boot_file = NULL; 158 159 vm_offset_t physical_start; 160 vm_offset_t physical_freestart; 161 vm_offset_t physical_freeend; 162 vm_offset_t physical_freeend_low; 163 vm_offset_t physical_end; 164 u_int free_pages; 165 int physmem = 0; 166 167 /* Physical and virtual addresses for some global pages */ 168 pv_addr_t irqstack; 169 pv_addr_t undstack; 170 pv_addr_t abtstack; 171 pv_addr_t kernelstack; 172 173 vm_offset_t msgbufphys; 174 175 static struct arm32_dma_range tsarm_dma_ranges[4]; 176 177 #if NISA > 0 178 extern void isa_tsarm_init(u_int, u_int); 179 #endif 180 181 extern u_int data_abort_handler_address; 182 extern u_int prefetch_abort_handler_address; 183 extern u_int undefined_handler_address; 184 185 #ifdef PMAP_DEBUG 186 extern int pmap_debug_level; 187 #endif 188 189 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 190 191 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 192 #define KERNEL_PT_KERNEL_NUM 4 193 /* L2 tables for mapping kernel VM */ 194 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 195 196 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 197 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 198 199 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 200 201 struct user *proc0paddr; 202 203 /* Prototypes */ 204 205 void consinit(void); 206 /* 207 * Define the default console speed for the machine. 208 */ 209 #ifndef CONSPEED 210 #define CONSPEED B115200 211 #endif /* ! CONSPEED */ 212 213 #ifndef CONMODE 214 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 215 #endif 216 217 int comcnspeed = CONSPEED; 218 int comcnmode = CONMODE; 219 220 #if KGDB 221 #ifndef KGDB_DEVNAME 222 #error Must define KGDB_DEVNAME 223 #endif 224 const char kgdb_devname[] = KGDB_DEVNAME; 225 226 #ifndef KGDB_DEVADDR 227 #error Must define KGDB_DEVADDR 228 #endif 229 unsigned long kgdb_devaddr = KGDB_DEVADDR; 230 231 #ifndef KGDB_DEVRATE 232 #define KGDB_DEVRATE CONSPEED 233 #endif 234 int kgdb_devrate = KGDB_DEVRATE; 235 236 #ifndef KGDB_DEVMODE 237 #define KGDB_DEVMODE CONMODE 238 #endif 239 int kgdb_devmode = KGDB_DEVMODE; 240 #endif /* KGDB */ 241 242 /* 243 * void cpu_reboot(int howto, char *bootstr) 244 * 245 * Reboots the system 246 * 247 * Deal with any syncing, unmounting, dumping and shutdown hooks, 248 * then reset the CPU. 249 */ 250 void 251 cpu_reboot(int howto, char *bootstr) 252 { 253 254 /* 255 * If we are still cold then hit the air brakes 256 * and crash to earth fast 257 */ 258 if (cold) { 259 doshutdownhooks(); 260 pmf_system_shutdown(boothowto); 261 printf("\r\n"); 262 printf("The operating system has halted.\r\n"); 263 printf("Please press any key to reboot.\r\n"); 264 cngetc(); 265 printf("\r\nrebooting...\r\n"); 266 goto reset; 267 } 268 269 /* Disable console buffering */ 270 271 /* 272 * If RB_NOSYNC was not specified sync the discs. 273 * Note: Unless cold is set to 1 here, syslogd will die during the 274 * unmount. It looks like syslogd is getting woken up only to find 275 * that it cannot page part of the binary in as the filesystem has 276 * been unmounted. 277 */ 278 if (!(howto & RB_NOSYNC)) 279 bootsync(); 280 281 /* Say NO to interrupts */ 282 splhigh(); 283 284 /* Do a dump if requested. */ 285 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 286 dumpsys(); 287 288 /* Run any shutdown hooks */ 289 doshutdownhooks(); 290 291 pmf_system_shutdown(boothowto); 292 293 /* Make sure IRQ's are disabled */ 294 IRQdisable; 295 296 if (howto & RB_HALT) { 297 printf("\r\n"); 298 printf("The operating system has halted.\r\n"); 299 printf("Please press any key to reboot.\r\n"); 300 cngetc(); 301 } 302 303 printf("\r\nrebooting...\r\n"); 304 reset: 305 /* 306 * Make really really sure that all interrupts are disabled, 307 * and poke the Internal Bus and Peripheral Bus reset lines. 308 */ 309 (void) disable_interrupts(I32_bit|F32_bit); 310 311 { 312 u_int32_t feed, ctrl; 313 314 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 315 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 316 317 __asm volatile ( 318 "mov r0, #0x5\n" 319 "mov r1, #0x1\n" 320 "strh r0, [%0]\n" 321 "strh r1, [%1]\n" 322 : 323 : "r" (feed), "r" (ctrl) 324 : "r0", "r1" 325 ); 326 } 327 328 for (;;); 329 } 330 331 /* Static device mappings. */ 332 static const struct pmap_devmap tsarm_devmap[] = { 333 { 334 EP93XX_AHB_VBASE, 335 EP93XX_AHB_HWBASE, 336 EP93XX_AHB_SIZE, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE, 339 }, 340 341 { 342 EP93XX_APB_VBASE, 343 EP93XX_APB_HWBASE, 344 EP93XX_APB_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 /* 350 * IO8 and IO16 space *must* be mapped contiguously with 351 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 352 * on that! 353 */ 354 { 355 TS7XXX_IO8_VBASE, 356 TS7XXX_IO8_HWBASE, 357 TS7XXX_IO8_SIZE, 358 VM_PROT_READ|VM_PROT_WRITE, 359 PTE_NOCACHE, 360 }, 361 362 { 363 TS7XXX_IO16_VBASE, 364 TS7XXX_IO16_HWBASE, 365 TS7XXX_IO16_SIZE, 366 VM_PROT_READ|VM_PROT_WRITE, 367 PTE_NOCACHE, 368 }, 369 370 { 371 0, 372 0, 373 0, 374 0, 375 0, 376 } 377 }; 378 379 /* 380 * u_int initarm(...) 381 * 382 * Initial entry point on startup. This gets called before main() is 383 * entered. 384 * It should be responsible for setting up everything that must be 385 * in place when main is called. 386 * This includes 387 * Taking a copy of the boot configuration structure. 388 * Initialising the physical console so characters can be printed. 389 * Setting up page tables for the kernel 390 * Initialising interrupt controllers to a sane default state 391 */ 392 u_int 393 initarm(void *arg) 394 { 395 #ifdef FIXME 396 struct bootconfig *passed_bootconfig = arg; 397 extern char _end[]; 398 #endif 399 int loop; 400 int loop1; 401 u_int l1pagetable; 402 paddr_t memstart; 403 psize_t memsize; 404 405 #ifdef FIXME 406 /* Calibrate the delay loop. */ 407 i80321_calibrate_delay(); 408 #endif 409 410 /* 411 * Since we map the on-board devices VA==PA, and the kernel 412 * is running VA==PA, it's possible for us to initialize 413 * the console now. 414 */ 415 consinit(); 416 417 #ifdef VERBOSE_INIT_ARM 418 /* Talk to the user */ 419 printf("\nNetBSD/tsarm booting ...\n"); 420 #endif 421 422 /* 423 * Heads up ... Setup the CPU / MMU / TLB functions 424 */ 425 if (set_cpufuncs()) 426 panic("cpu not recognized!"); 427 428 /* 429 * We are currently running with the MMU enabled 430 */ 431 432 #ifdef FIXME 433 /* 434 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 435 * registers. 436 */ 437 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 438 &memstart, &memsize); 439 #else 440 memstart = 0x0; 441 memsize = 0x2000000; 442 #endif 443 444 #ifdef VERBOSE_INIT_ARM 445 printf("initarm: Configuring system ...\n"); 446 #endif 447 448 /* Fake bootconfig structure for the benefit of pmap.c */ 449 /* XXX must make the memory description h/w independent */ 450 bootconfig.dramblocks = 4; 451 bootconfig.dram[0].address = 0x0UL; 452 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 453 bootconfig.dram[1].address = 0x1000000UL; 454 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 455 bootconfig.dram[2].address = 0x4000000UL; 456 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 457 bootconfig.dram[3].address = 0x5000000UL; 458 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 459 460 /* 461 * Set up the variables that define the availablilty of 462 * physical memory. For now, we're going to set 463 * physical_freestart to 0x00200000 (where the kernel 464 * was loaded), and allocate the memory we need downwards. 465 * If we get too close to the L1 table that we set up, we 466 * will panic. We will update physical_freestart and 467 * physical_freeend later to reflect what pmap_bootstrap() 468 * wants to see. 469 * 470 * XXX pmap_bootstrap() needs an enema. 471 */ 472 physical_start = bootconfig.dram[0].address; 473 physical_end = bootconfig.dram[0].address + 474 (bootconfig.dram[0].pages * PAGE_SIZE); 475 476 physical_freestart = 0x00009000UL; 477 physical_freeend = 0x00200000UL; 478 479 physmem = (physical_end - physical_start) / PAGE_SIZE; 480 481 #ifdef VERBOSE_INIT_ARM 482 /* Tell the user about the memory */ 483 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 484 physical_start, physical_end - 1); 485 #endif 486 487 /* 488 * Okay, the kernel starts 2MB in from the bottom of physical 489 * memory. We are going to allocate our bootstrap pages downwards 490 * from there. 491 * 492 * We need to allocate some fixed page tables to get the kernel 493 * going. We allocate one page directory and a number of page 494 * tables and store the physical addresses in the kernel_pt_table 495 * array. 496 * 497 * The kernel page directory must be on a 16K boundary. The page 498 * tables must be on 4K bounaries. What we do is allocate the 499 * page directory on the first 16K boundary that we encounter, and 500 * the page tables on 4K boundaries otherwise. Since we allocate 501 * at least 3 L2 page tables, we are guaranteed to encounter at 502 * least one 16K aligned region. 503 */ 504 505 #ifdef VERBOSE_INIT_ARM 506 printf("Allocating page tables\n"); 507 #endif 508 509 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 513 physical_freestart, free_pages, free_pages); 514 #endif 515 516 /* Define a macro to simplify memory allocation */ 517 #define valloc_pages(var, np) \ 518 alloc_pages((var).pv_pa, (np)); \ 519 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 520 521 #define alloc_pages(var, np) \ 522 physical_freeend -= ((np) * PAGE_SIZE); \ 523 if (physical_freeend < physical_freestart) \ 524 panic("initarm: out of memory"); \ 525 (var) = physical_freeend; \ 526 free_pages -= (np); \ 527 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 528 529 loop1 = 0; 530 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 531 /* Are we 16KB aligned for an L1 ? */ 532 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 533 && kernel_l1pt.pv_pa == 0) { 534 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 535 } else { 536 valloc_pages(kernel_pt_table[loop1], 537 L2_TABLE_SIZE / PAGE_SIZE); 538 ++loop1; 539 } 540 } 541 542 /* This should never be able to happen but better confirm that. */ 543 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 544 panic("initarm: Failed to align the kernel page directory"); 545 546 /* 547 * Allocate a page for the system vectors page 548 */ 549 alloc_pages(systempage.pv_pa, 1); 550 551 /* Allocate stacks for all modes */ 552 valloc_pages(irqstack, IRQ_STACK_SIZE); 553 valloc_pages(abtstack, ABT_STACK_SIZE); 554 valloc_pages(undstack, UND_STACK_SIZE); 555 valloc_pages(kernelstack, UPAGES); 556 557 #ifdef VERBOSE_INIT_ARM 558 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 559 irqstack.pv_va); 560 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 561 abtstack.pv_va); 562 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 563 undstack.pv_va); 564 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 565 kernelstack.pv_va); 566 #endif 567 568 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 569 570 /* 571 * Ok we have allocated physical pages for the primary kernel 572 * page tables. Save physical_freeend for when we give whats left 573 * of memory below 2Mbyte to UVM. 574 */ 575 576 physical_freeend_low = physical_freeend; 577 578 #ifdef VERBOSE_INIT_ARM 579 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 580 #endif 581 582 /* 583 * Now we start construction of the L1 page table 584 * We start by mapping the L2 page tables into the L1. 585 * This means that we can replace L1 mappings later on if necessary 586 */ 587 l1pagetable = kernel_l1pt.pv_pa; 588 589 /* Map the L2 pages tables in the L1 page table */ 590 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 591 &kernel_pt_table[KERNEL_PT_SYS]); 592 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 593 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 594 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 595 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 596 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 597 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 598 599 /* update the top of the kernel VM */ 600 pmap_curmaxkvaddr = 601 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 602 603 #ifdef VERBOSE_INIT_ARM 604 printf("Mapping kernel\n"); 605 #endif 606 607 /* Now we fill in the L2 pagetable for the kernel static code/data */ 608 { 609 extern char etext[], _end[]; 610 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 611 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 612 u_int logical; 613 614 textsize = (textsize + PGOFSET) & ~PGOFSET; 615 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 616 617 logical = 0x00200000; /* offset of kernel in RAM */ 618 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 619 physical_start + logical, textsize, 620 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 622 physical_start + logical, totalsize - textsize, 623 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 } 625 626 #ifdef VERBOSE_INIT_ARM 627 printf("Constructing L2 page tables\n"); 628 #endif 629 630 /* Map the stack pages */ 631 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 632 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 633 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 634 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 635 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 636 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 637 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 638 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 640 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 641 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 642 643 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 644 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 645 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 647 } 648 649 /* Map the vector page. */ 650 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 651 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 652 653 /* Map the statically mapped devices. */ 654 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 655 656 /* 657 * Update the physical_freestart/physical_freeend/free_pages 658 * variables. 659 */ 660 { 661 extern char _end[]; 662 663 physical_freestart = physical_start + 664 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 665 KERNEL_BASE); 666 physical_freeend = physical_end; 667 free_pages = 668 (physical_freeend - physical_freestart) / PAGE_SIZE; 669 } 670 671 /* 672 * Now we have the real page tables in place so we can switch to them. 673 * Once this is done we will be running with the REAL kernel page 674 * tables. 675 */ 676 677 /* Switch tables */ 678 #ifdef VERBOSE_INIT_ARM 679 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 680 physical_freestart, free_pages, free_pages); 681 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 682 #endif 683 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 684 setttb(kernel_l1pt.pv_pa); 685 cpu_tlb_flushID(); 686 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 687 688 /* 689 * Moved from cpu_startup() as data_abort_handler() references 690 * this during uvm init 691 */ 692 proc0paddr = (struct user *)kernelstack.pv_va; 693 lwp0.l_addr = proc0paddr; 694 695 #ifdef VERBOSE_INIT_ARM 696 printf("done!\n"); 697 #endif 698 699 #ifdef VERBOSE_INIT_ARM 700 printf("bootstrap done.\n"); 701 #endif 702 703 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 704 705 /* 706 * Pages were allocated during the secondary bootstrap for the 707 * stacks for different CPU modes. 708 * We must now set the r13 registers in the different CPU modes to 709 * point to these stacks. 710 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 711 * of the stack memory. 712 */ 713 #ifdef VERBOSE_INIT_ARM 714 printf("init subsystems: stacks "); 715 #endif 716 717 set_stackptr(PSR_IRQ32_MODE, 718 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 719 set_stackptr(PSR_ABT32_MODE, 720 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 721 set_stackptr(PSR_UND32_MODE, 722 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 723 724 /* 725 * Well we should set a data abort handler. 726 * Once things get going this will change as we will need a proper 727 * handler. 728 * Until then we will use a handler that just panics but tells us 729 * why. 730 * Initialisation of the vectors will just panic on a data abort. 731 * This just fills in a slightly better one. 732 */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("vectors "); 735 #endif 736 data_abort_handler_address = (u_int)data_abort_handler; 737 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 738 undefined_handler_address = (u_int)undefinedinstruction_bounce; 739 740 /* Initialise the undefined instruction handlers */ 741 #ifdef VERBOSE_INIT_ARM 742 printf("undefined "); 743 #endif 744 undefined_init(); 745 746 /* Load memory into UVM. */ 747 #ifdef VERBOSE_INIT_ARM 748 printf("page "); 749 #endif 750 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 751 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 752 atop(physical_freestart), atop(physical_freeend), 753 VM_FREELIST_DEFAULT); 754 uvm_page_physload(0, atop(physical_freeend_low), 755 0, atop(physical_freeend_low), 756 VM_FREELIST_DEFAULT); 757 /* 758 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 759 * we've only been working with the first one mapped at 0x0. Tell 760 * UVM about the others. 761 */ 762 uvm_page_physload(atop(0x1000000), atop(0x1800000), 763 atop(0x1000000), atop(0x1800000), 764 VM_FREELIST_DEFAULT); 765 uvm_page_physload(atop(0x4000000), atop(0x4800000), 766 atop(0x4000000), atop(0x4800000), 767 VM_FREELIST_DEFAULT); 768 uvm_page_physload(atop(0x5000000), atop(0x5800000), 769 atop(0x5000000), atop(0x5800000), 770 VM_FREELIST_DEFAULT); 771 772 physmem = 0x2000000 / PAGE_SIZE; 773 774 775 /* Boot strap pmap telling it where the kernel page table is */ 776 #ifdef VERBOSE_INIT_ARM 777 printf("pmap "); 778 #endif 779 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 780 781 /* Setup the IRQ system */ 782 #ifdef VERBOSE_INIT_ARM 783 printf("irq "); 784 #endif 785 ep93xx_intr_init(); 786 #if NISA > 0 787 isa_intr_init(); 788 789 #ifdef VERBOSE_INIT_ARM 790 printf("isa "); 791 #endif 792 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 793 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 794 #endif 795 796 #ifdef VERBOSE_INIT_ARM 797 printf("done.\n"); 798 #endif 799 800 #ifdef BOOTHOWTO 801 boothowto = BOOTHOWTO; 802 #endif 803 804 #if NKSYMS || defined(DDB) || defined(LKM) 805 /* Firmware doesn't load symbols. */ 806 ksyms_init(0, NULL, NULL); 807 #endif 808 809 #ifdef DDB 810 db_machine_init(); 811 if (boothowto & RB_KDB) 812 Debugger(); 813 #endif 814 815 /* We return the new stack pointer address */ 816 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 817 } 818 819 void 820 consinit(void) 821 { 822 static int consinit_called; 823 bus_space_handle_t ioh; 824 825 if (consinit_called != 0) 826 return; 827 828 consinit_called = 1; 829 830 /* 831 * Console devices are already mapped in VA. Our devmap reflects 832 * this, so register it now so drivers can map the console 833 * device. 834 */ 835 pmap_devmap_register(tsarm_devmap); 836 #if 0 837 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 838 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 839 840 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 841 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 842 { 843 panic("can't init serial console"); 844 } 845 #endif 846 847 #if NEPCOM > 0 848 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 849 EP93XX_APB_UART_SIZE, 0, &ioh); 850 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 851 ioh, comcnspeed, comcnmode)) 852 { 853 panic("can't init serial console"); 854 } 855 #else 856 panic("serial console not configured"); 857 #endif 858 #if KGDB 859 #if NEPCOM > 0 860 if (strcmp(kgdb_devname, "epcom") == 0) { 861 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 862 kgdb_devmode); 863 } 864 #endif /* NEPCOM > 0 */ 865 #endif /* KGDB */ 866 } 867 868 869 bus_dma_tag_t 870 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 871 { 872 int i; 873 struct arm32_bus_dma_tag *dmat; 874 875 for (i = 0; i < bootconfig.dramblocks; i++) { 876 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 877 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 878 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 879 PAGE_SIZE; 880 } 881 882 dmat = dma_tag_template; 883 884 dmat->_ranges = tsarm_dma_ranges; 885 dmat->_nranges = bootconfig.dramblocks; 886 887 return dmat; 888 } 889
Indexes created Fri Oct 03 02:09:57 GMT 2025