tsarm_machdep.c revision 1.23
1 /* $NetBSD: tsarm_machdep.c,v 1.23 2014/09/13 18:08:39 matt 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 Iyonix. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: tsarm_machdep.c,v 1.23 2014/09/13 18:08:39 matt 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 #include <sys/bus.h> 93 #include <sys/cpu.h> 94 95 #include <uvm/uvm_extern.h> 96 97 #include <dev/cons.h> 98 99 #include <machine/db_machdep.h> 100 #include <ddb/db_sym.h> 101 #include <ddb/db_extern.h> 102 103 #include <acorn32/include/bootconfig.h> 104 #include <arm/locore.h> 105 #include <arm/undefined.h> 106 107 /* Define various stack sizes in pages */ 108 #define IRQ_STACK_SIZE 8 109 #define ABT_STACK_SIZE 8 110 #define UND_STACK_SIZE 8 111 112 #include <arm/arm32/machdep.h> 113 114 #include <arm/ep93xx/ep93xxreg.h> 115 #include <arm/ep93xx/ep93xxvar.h> 116 117 #include <dev/ic/comreg.h> 118 #include <dev/ic/comvar.h> 119 120 #include "epcom.h" 121 #if NEPCOM > 0 122 #include <arm/ep93xx/epcomvar.h> 123 #endif 124 125 #include "isa.h" 126 #if NISA > 0 127 #include <dev/isa/isareg.h> 128 #include <dev/isa/isavar.h> 129 #endif 130 131 #include <machine/isa_machdep.h> 132 133 #include <evbarm/tsarm/tsarmreg.h> 134 135 #include "ksyms.h" 136 137 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 138 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 139 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 140 141 /* 142 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 143 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 144 */ 145 #define KERNEL_VM_SIZE 0x0C000000 146 147 struct bootconfig bootconfig; /* Boot config storage */ 148 char *boot_args = NULL; 149 char *boot_file = NULL; 150 151 vaddr_t physical_start; 152 vaddr_t physical_freestart; 153 vaddr_t physical_freeend; 154 vaddr_t physical_freeend_low; 155 vaddr_t physical_end; 156 u_int free_pages; 157 158 paddr_t msgbufphys; 159 160 static struct arm32_dma_range tsarm_dma_ranges[4]; 161 162 #if NISA > 0 163 extern void isa_tsarm_init(u_int, u_int); 164 #endif 165 166 #ifdef PMAP_DEBUG 167 extern int pmap_debug_level; 168 #endif 169 170 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 171 172 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 173 #define KERNEL_PT_KERNEL_NUM 4 174 /* L2 tables for mapping kernel VM */ 175 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 176 177 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 178 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 179 180 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 181 182 /* Prototypes */ 183 184 void consinit(void); 185 /* 186 * Define the default console speed for the machine. 187 */ 188 #ifndef CONSPEED 189 #define CONSPEED B115200 190 #endif /* ! CONSPEED */ 191 192 #ifndef CONMODE 193 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 194 #endif 195 196 int comcnspeed = CONSPEED; 197 int comcnmode = CONMODE; 198 199 #if KGDB 200 #ifndef KGDB_DEVNAME 201 #error Must define KGDB_DEVNAME 202 #endif 203 const char kgdb_devname[] = KGDB_DEVNAME; 204 205 #ifndef KGDB_DEVADDR 206 #error Must define KGDB_DEVADDR 207 #endif 208 unsigned long kgdb_devaddr = KGDB_DEVADDR; 209 210 #ifndef KGDB_DEVRATE 211 #define KGDB_DEVRATE CONSPEED 212 #endif 213 int kgdb_devrate = KGDB_DEVRATE; 214 215 #ifndef KGDB_DEVMODE 216 #define KGDB_DEVMODE CONMODE 217 #endif 218 int kgdb_devmode = KGDB_DEVMODE; 219 #endif /* KGDB */ 220 221 /* 222 * void cpu_reboot(int howto, char *bootstr) 223 * 224 * Reboots the system 225 * 226 * Deal with any syncing, unmounting, dumping and shutdown hooks, 227 * then reset the CPU. 228 */ 229 void 230 cpu_reboot(int howto, char *bootstr) 231 { 232 233 /* 234 * If we are still cold then hit the air brakes 235 * and crash to earth fast 236 */ 237 if (cold) { 238 doshutdownhooks(); 239 pmf_system_shutdown(boothowto); 240 printf("\r\n"); 241 printf("The operating system has halted.\r\n"); 242 printf("Please press any key to reboot.\r\n"); 243 cngetc(); 244 printf("\r\nrebooting...\r\n"); 245 goto reset; 246 } 247 248 /* Disable console buffering */ 249 250 /* 251 * If RB_NOSYNC was not specified sync the discs. 252 * Note: Unless cold is set to 1 here, syslogd will die during the 253 * unmount. It looks like syslogd is getting woken up only to find 254 * that it cannot page part of the binary in as the filesystem has 255 * been unmounted. 256 */ 257 if (!(howto & RB_NOSYNC)) 258 bootsync(); 259 260 /* Say NO to interrupts */ 261 splhigh(); 262 263 /* Do a dump if requested. */ 264 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 265 dumpsys(); 266 267 /* Run any shutdown hooks */ 268 doshutdownhooks(); 269 270 pmf_system_shutdown(boothowto); 271 272 /* Make sure IRQ's are disabled */ 273 IRQdisable; 274 275 if (howto & RB_HALT) { 276 printf("\r\n"); 277 printf("The operating system has halted.\r\n"); 278 printf("Please press any key to reboot.\r\n"); 279 cngetc(); 280 } 281 282 printf("\r\nrebooting...\r\n"); 283 reset: 284 /* 285 * Make really really sure that all interrupts are disabled, 286 * and poke the Internal Bus and Peripheral Bus reset lines. 287 */ 288 (void) disable_interrupts(I32_bit|F32_bit); 289 290 { 291 uint32_t feed, ctrl; 292 293 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 294 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 295 296 __asm volatile ( 297 "mov r0, #0x5\n" 298 "mov r1, #0x1\n" 299 "strh r0, [%0]\n" 300 "strh r1, [%1]\n" 301 : 302 : "r" (feed), "r" (ctrl) 303 : "r0", "r1" 304 ); 305 } 306 307 for (;;); 308 } 309 310 /* Static device mappings. */ 311 static const struct pmap_devmap tsarm_devmap[] = { 312 { 313 EP93XX_AHB_VBASE, 314 EP93XX_AHB_HWBASE, 315 EP93XX_AHB_SIZE, 316 VM_PROT_READ|VM_PROT_WRITE, 317 PTE_NOCACHE, 318 }, 319 320 { 321 EP93XX_APB_VBASE, 322 EP93XX_APB_HWBASE, 323 EP93XX_APB_SIZE, 324 VM_PROT_READ|VM_PROT_WRITE, 325 PTE_NOCACHE, 326 }, 327 328 /* 329 * IO8 and IO16 space *must* be mapped contiguously with 330 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 331 * on that! 332 */ 333 { 334 TS7XXX_IO8_VBASE, 335 TS7XXX_IO8_HWBASE, 336 TS7XXX_IO8_SIZE, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE, 339 }, 340 341 { 342 TS7XXX_IO16_VBASE, 343 TS7XXX_IO16_HWBASE, 344 TS7XXX_IO16_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 { 350 0, 351 0, 352 0, 353 0, 354 0, 355 } 356 }; 357 358 /* 359 * u_int initarm(...) 360 * 361 * Initial entry point on startup. This gets called before main() is 362 * entered. 363 * It should be responsible for setting up everything that must be 364 * in place when main is called. 365 * This includes 366 * Taking a copy of the boot configuration structure. 367 * Initialising the physical console so characters can be printed. 368 * Setting up page tables for the kernel 369 * Initialising interrupt controllers to a sane default state 370 */ 371 u_int 372 initarm(void *arg) 373 { 374 #ifdef FIXME 375 struct bootconfig *passed_bootconfig = arg; 376 extern char _end[]; 377 #endif 378 int loop; 379 int loop1; 380 u_int l1pagetable; 381 382 #ifdef FIXME 383 paddr_t memstart; 384 psize_t memsize; 385 386 /* Calibrate the delay loop. */ 387 i80321_calibrate_delay(); 388 #endif 389 390 /* 391 * Since we map the on-board devices VA==PA, and the kernel 392 * is running VA==PA, it's possible for us to initialize 393 * the console now. 394 */ 395 consinit(); 396 397 #ifdef VERBOSE_INIT_ARM 398 /* Talk to the user */ 399 printf("\nNetBSD/tsarm booting ...\n"); 400 #endif 401 402 /* 403 * Heads up ... Setup the CPU / MMU / TLB functions 404 */ 405 if (set_cpufuncs()) 406 panic("cpu not recognized!"); 407 408 /* 409 * We are currently running with the MMU enabled 410 */ 411 412 #ifdef FIXME 413 /* 414 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 415 * registers. 416 */ 417 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 418 &memstart, &memsize); 419 420 memstart = 0x0; 421 memsize = 0x2000000; 422 #endif 423 424 #ifdef VERBOSE_INIT_ARM 425 printf("initarm: Configuring system ...\n"); 426 #endif 427 428 /* Fake bootconfig structure for the benefit of pmap.c */ 429 /* XXX must make the memory description h/w independent */ 430 bootconfig.dramblocks = 4; 431 bootconfig.dram[0].address = 0x0UL; 432 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 433 bootconfig.dram[1].address = 0x1000000UL; 434 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 435 bootconfig.dram[2].address = 0x4000000UL; 436 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 437 bootconfig.dram[3].address = 0x5000000UL; 438 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 439 440 /* 441 * Set up the variables that define the availablilty of 442 * physical memory. For now, we're going to set 443 * physical_freestart to 0x00200000 (where the kernel 444 * was loaded), and allocate the memory we need downwards. 445 * If we get too close to the L1 table that we set up, we 446 * will panic. We will update physical_freestart and 447 * physical_freeend later to reflect what pmap_bootstrap() 448 * wants to see. 449 * 450 * XXX pmap_bootstrap() needs an enema. 451 */ 452 physical_start = bootconfig.dram[0].address; 453 physical_end = bootconfig.dram[0].address + 454 (bootconfig.dram[0].pages * PAGE_SIZE); 455 456 physical_freestart = 0x00009000UL; 457 physical_freeend = 0x00200000UL; 458 459 physmem = (physical_end - physical_start) / PAGE_SIZE; 460 461 #ifdef VERBOSE_INIT_ARM 462 /* Tell the user about the memory */ 463 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 464 physical_start, physical_end - 1); 465 #endif 466 467 /* 468 * Okay, the kernel starts 2MB in from the bottom of physical 469 * memory. We are going to allocate our bootstrap pages downwards 470 * from there. 471 * 472 * We need to allocate some fixed page tables to get the kernel 473 * going. We allocate one page directory and a number of page 474 * tables and store the physical addresses in the kernel_pt_table 475 * array. 476 * 477 * The kernel page directory must be on a 16K boundary. The page 478 * tables must be on 4K bounaries. What we do is allocate the 479 * page directory on the first 16K boundary that we encounter, and 480 * the page tables on 4K boundaries otherwise. Since we allocate 481 * at least 3 L2 page tables, we are guaranteed to encounter at 482 * least one 16K aligned region. 483 */ 484 485 #ifdef VERBOSE_INIT_ARM 486 printf("Allocating page tables\n"); 487 #endif 488 489 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 490 491 #ifdef VERBOSE_INIT_ARM 492 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 493 physical_freestart, free_pages, free_pages); 494 #endif 495 496 /* Define a macro to simplify memory allocation */ 497 #define valloc_pages(var, np) \ 498 alloc_pages((var).pv_pa, (np)); \ 499 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 500 501 #define alloc_pages(var, np) \ 502 physical_freeend -= ((np) * PAGE_SIZE); \ 503 if (physical_freeend < physical_freestart) \ 504 panic("initarm: out of memory"); \ 505 (var) = physical_freeend; \ 506 free_pages -= (np); \ 507 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 508 509 loop1 = 0; 510 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 511 /* Are we 16KB aligned for an L1 ? */ 512 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 513 && kernel_l1pt.pv_pa == 0) { 514 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 515 } else { 516 valloc_pages(kernel_pt_table[loop1], 517 L2_TABLE_SIZE / PAGE_SIZE); 518 ++loop1; 519 } 520 } 521 522 /* This should never be able to happen but better confirm that. */ 523 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 524 panic("initarm: Failed to align the kernel page directory"); 525 526 /* 527 * Allocate a page for the system vectors page 528 */ 529 alloc_pages(systempage.pv_pa, 1); 530 531 /* Allocate stacks for all modes */ 532 valloc_pages(irqstack, IRQ_STACK_SIZE); 533 valloc_pages(abtstack, ABT_STACK_SIZE); 534 valloc_pages(undstack, UND_STACK_SIZE); 535 valloc_pages(kernelstack, UPAGES); 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 539 irqstack.pv_va); 540 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 541 abtstack.pv_va); 542 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 543 undstack.pv_va); 544 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 545 kernelstack.pv_va); 546 #endif 547 548 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 549 550 /* 551 * Ok we have allocated physical pages for the primary kernel 552 * page tables. Save physical_freeend for when we give whats left 553 * of memory below 2Mbyte to UVM. 554 */ 555 556 physical_freeend_low = physical_freeend; 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 560 #endif 561 562 /* 563 * Now we start construction of the L1 page table 564 * We start by mapping the L2 page tables into the L1. 565 * This means that we can replace L1 mappings later on if necessary 566 */ 567 l1pagetable = kernel_l1pt.pv_pa; 568 569 /* Map the L2 pages tables in the L1 page table */ 570 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 571 &kernel_pt_table[KERNEL_PT_SYS]); 572 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 573 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 574 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 575 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 576 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 577 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 578 579 /* update the top of the kernel VM */ 580 pmap_curmaxkvaddr = 581 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 582 583 #ifdef VERBOSE_INIT_ARM 584 printf("Mapping kernel\n"); 585 #endif 586 587 /* Now we fill in the L2 pagetable for the kernel static code/data */ 588 { 589 extern char etext[], _end[]; 590 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 591 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 592 u_int logical; 593 594 textsize = (textsize + PGOFSET) & ~PGOFSET; 595 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 596 597 logical = 0x00200000; /* offset of kernel in RAM */ 598 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 599 physical_start + logical, textsize, 600 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 602 physical_start + logical, totalsize - textsize, 603 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 } 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("Constructing L2 page tables\n"); 608 #endif 609 610 /* Map the stack pages */ 611 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 612 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 613 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 614 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 615 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 616 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 618 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 619 620 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 621 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 622 623 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 624 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 625 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 626 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 627 } 628 629 /* Map the vector page. */ 630 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 633 /* Map the statically mapped devices. */ 634 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 635 636 /* 637 * Update the physical_freestart/physical_freeend/free_pages 638 * variables. 639 */ 640 { 641 extern char _end[]; 642 643 physical_freestart = physical_start + 644 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 645 KERNEL_BASE); 646 physical_freeend = physical_end; 647 free_pages = 648 (physical_freeend - physical_freestart) / PAGE_SIZE; 649 } 650 651 /* 652 * Now we have the real page tables in place so we can switch to them. 653 * Once this is done we will be running with the REAL kernel page 654 * tables. 655 */ 656 657 /* Switch tables */ 658 #ifdef VERBOSE_INIT_ARM 659 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 660 physical_freestart, free_pages, free_pages); 661 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 662 #endif 663 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 664 cpu_setttb(kernel_l1pt.pv_pa, true); 665 cpu_tlb_flushID(); 666 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 667 668 /* 669 * Moved from cpu_startup() as data_abort_handler() references 670 * this during uvm init 671 */ 672 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 673 674 #ifdef VERBOSE_INIT_ARM 675 printf("done!\n"); 676 #endif 677 678 #ifdef VERBOSE_INIT_ARM 679 printf("bootstrap done.\n"); 680 #endif 681 682 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 683 684 /* 685 * Pages were allocated during the secondary bootstrap for the 686 * stacks for different CPU modes. 687 * We must now set the r13 registers in the different CPU modes to 688 * point to these stacks. 689 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 690 * of the stack memory. 691 */ 692 #ifdef VERBOSE_INIT_ARM 693 printf("init subsystems: stacks "); 694 #endif 695 696 set_stackptr(PSR_IRQ32_MODE, 697 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 698 set_stackptr(PSR_ABT32_MODE, 699 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 700 set_stackptr(PSR_UND32_MODE, 701 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 702 703 /* 704 * Well we should set a data abort handler. 705 * Once things get going this will change as we will need a proper 706 * handler. 707 * Until then we will use a handler that just panics but tells us 708 * why. 709 * Initialisation of the vectors will just panic on a data abort. 710 * This just fills in a slightly better one. 711 */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("vectors "); 714 #endif 715 data_abort_handler_address = (u_int)data_abort_handler; 716 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 717 undefined_handler_address = (u_int)undefinedinstruction_bounce; 718 719 /* Initialise the undefined instruction handlers */ 720 #ifdef VERBOSE_INIT_ARM 721 printf("undefined "); 722 #endif 723 undefined_init(); 724 725 /* Load memory into UVM. */ 726 #ifdef VERBOSE_INIT_ARM 727 printf("page "); 728 #endif 729 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 730 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 731 atop(physical_freestart), atop(physical_freeend), 732 VM_FREELIST_DEFAULT); 733 uvm_page_physload(0, atop(physical_freeend_low), 734 0, atop(physical_freeend_low), 735 VM_FREELIST_DEFAULT); 736 /* 737 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 738 * we've only been working with the first one mapped at 0x0. Tell 739 * UVM about the others. 740 */ 741 uvm_page_physload(atop(0x1000000), atop(0x1800000), 742 atop(0x1000000), atop(0x1800000), 743 VM_FREELIST_DEFAULT); 744 uvm_page_physload(atop(0x4000000), atop(0x4800000), 745 atop(0x4000000), atop(0x4800000), 746 VM_FREELIST_DEFAULT); 747 uvm_page_physload(atop(0x5000000), atop(0x5800000), 748 atop(0x5000000), atop(0x5800000), 749 VM_FREELIST_DEFAULT); 750 751 physmem = 0x2000000 / PAGE_SIZE; 752 753 754 /* Boot strap pmap telling it where the kernel page table is */ 755 #ifdef VERBOSE_INIT_ARM 756 printf("pmap "); 757 #endif 758 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 759 760 /* Setup the IRQ system */ 761 #ifdef VERBOSE_INIT_ARM 762 printf("irq "); 763 #endif 764 ep93xx_intr_init(); 765 #if NISA > 0 766 isa_intr_init(); 767 768 #ifdef VERBOSE_INIT_ARM 769 printf("isa "); 770 #endif 771 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 772 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 773 #endif 774 775 #ifdef VERBOSE_INIT_ARM 776 printf("done.\n"); 777 #endif 778 779 #ifdef BOOTHOWTO 780 boothowto = BOOTHOWTO; 781 #endif 782 783 #ifdef DDB 784 db_machine_init(); 785 if (boothowto & RB_KDB) 786 Debugger(); 787 #endif 788 789 /* We return the new stack pointer address */ 790 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 791 } 792 793 void 794 consinit(void) 795 { 796 static int consinit_called; 797 bus_space_handle_t ioh; 798 799 if (consinit_called != 0) 800 return; 801 802 consinit_called = 1; 803 804 /* 805 * Console devices are already mapped in VA. Our devmap reflects 806 * this, so register it now so drivers can map the console 807 * device. 808 */ 809 pmap_devmap_register(tsarm_devmap); 810 #if 0 811 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 812 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 813 814 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 815 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 816 { 817 panic("can't init serial console"); 818 } 819 #endif 820 821 #if NEPCOM > 0 822 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 823 EP93XX_APB_UART_SIZE, 0, &ioh); 824 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 825 ioh, comcnspeed, comcnmode)) 826 { 827 panic("can't init serial console"); 828 } 829 #else 830 panic("serial console not configured"); 831 #endif 832 #if KGDB 833 #if NEPCOM > 0 834 if (strcmp(kgdb_devname, "epcom") == 0) { 835 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 836 kgdb_devmode); 837 } 838 #endif /* NEPCOM > 0 */ 839 #endif /* KGDB */ 840 } 841 842 843 bus_dma_tag_t 844 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 845 { 846 int i; 847 struct arm32_bus_dma_tag *dmat; 848 849 for (i = 0; i < bootconfig.dramblocks; i++) { 850 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 851 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 852 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 853 PAGE_SIZE; 854 } 855 856 dmat = dma_tag_template; 857 858 dmat->_ranges = tsarm_dma_ranges; 859 dmat->_nranges = bootconfig.dramblocks; 860 861 return dmat; 862 } 863
Indexes created Fri Oct 03 02:09:57 GMT 2025