tsarm_machdep.c revision 1.5
1 /* $NetBSD: tsarm_machdep.c,v 1.5 2006/11/24 22:04:22 wiz 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 1.5 2006/11/24 22:04:22 wiz 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 "opt_ipkdb.h" 131 #include "ksyms.h" 132 133 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 134 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 135 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 136 137 /* 138 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 139 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 140 */ 141 #define KERNEL_VM_SIZE 0x0C000000 142 143 /* 144 * Address to call from cpu_reset() to reset the machine. 145 * This is machine architecture dependant as it varies depending 146 * on where the ROM appears when you turn the MMU off. 147 */ 148 149 u_int cpu_reset_address = 0x00000000; 150 151 /* Define various stack sizes in pages */ 152 #define IRQ_STACK_SIZE 8 153 #define ABT_STACK_SIZE 8 154 #ifdef IPKDB 155 #define UND_STACK_SIZE 16 156 #else 157 #define UND_STACK_SIZE 8 158 #endif 159 160 struct bootconfig bootconfig; /* Boot config storage */ 161 char *boot_args = NULL; 162 char *boot_file = NULL; 163 164 vm_offset_t physical_start; 165 vm_offset_t physical_freestart; 166 vm_offset_t physical_freeend; 167 vm_offset_t physical_freeend_low; 168 vm_offset_t physical_end; 169 u_int free_pages; 170 int physmem = 0; 171 172 /* Physical and virtual addresses for some global pages */ 173 pv_addr_t systempage; 174 pv_addr_t irqstack; 175 pv_addr_t undstack; 176 pv_addr_t abtstack; 177 pv_addr_t kernelstack; 178 179 vm_offset_t msgbufphys; 180 181 static struct arm32_dma_range tsarm_dma_ranges[4]; 182 183 #if NISA > 0 184 extern void isa_tsarm_init(u_int, u_int); 185 #endif 186 187 extern u_int data_abort_handler_address; 188 extern u_int prefetch_abort_handler_address; 189 extern u_int undefined_handler_address; 190 191 #ifdef PMAP_DEBUG 192 extern int pmap_debug_level; 193 #endif 194 195 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 196 197 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 198 #define KERNEL_PT_KERNEL_NUM 4 199 /* L2 tables for mapping kernel VM */ 200 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 201 202 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 203 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 204 205 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 206 207 struct user *proc0paddr; 208 209 /* Prototypes */ 210 211 void consinit(void); 212 /* 213 * Define the default console speed for the machine. 214 */ 215 #ifndef CONSPEED 216 #define CONSPEED B115200 217 #endif /* ! CONSPEED */ 218 219 #ifndef CONMODE 220 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 221 #endif 222 223 int comcnspeed = CONSPEED; 224 int comcnmode = CONMODE; 225 226 #if KGDB 227 #ifndef KGDB_DEVNAME 228 #error Must define KGDB_DEVNAME 229 #endif 230 const char kgdb_devname[] = KGDB_DEVNAME; 231 232 #ifndef KGDB_DEVADDR 233 #error Must define KGDB_DEVADDR 234 #endif 235 unsigned long kgdb_devaddr = KGDB_DEVADDR; 236 237 #ifndef KGDB_DEVRATE 238 #define KGDB_DEVRATE CONSPEED 239 #endif 240 int kgdb_devrate = KGDB_DEVRATE; 241 242 #ifndef KGDB_DEVMODE 243 #define KGDB_DEVMODE CONMODE 244 #endif 245 int kgdb_devmode = KGDB_DEVMODE; 246 #endif /* KGDB */ 247 248 /* 249 * void cpu_reboot(int howto, char *bootstr) 250 * 251 * Reboots the system 252 * 253 * Deal with any syncing, unmounting, dumping and shutdown hooks, 254 * then reset the CPU. 255 */ 256 void 257 cpu_reboot(int howto, char *bootstr) 258 { 259 260 /* 261 * If we are still cold then hit the air brakes 262 * and crash to earth fast 263 */ 264 if (cold) { 265 doshutdownhooks(); 266 printf("\r\n"); 267 printf("The operating system has halted.\r\n"); 268 printf("Please press any key to reboot.\r\n"); 269 cngetc(); 270 printf("\r\nrebooting...\r\n"); 271 goto reset; 272 } 273 274 /* Disable console buffering */ 275 276 /* 277 * If RB_NOSYNC was not specified sync the discs. 278 * Note: Unless cold is set to 1 here, syslogd will die during the 279 * unmount. It looks like syslogd is getting woken up only to find 280 * that it cannot page part of the binary in as the filesystem has 281 * been unmounted. 282 */ 283 if (!(howto & RB_NOSYNC)) 284 bootsync(); 285 286 /* Say NO to interrupts */ 287 splhigh(); 288 289 /* Do a dump if requested. */ 290 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 291 dumpsys(); 292 293 /* Run any shutdown hooks */ 294 doshutdownhooks(); 295 296 /* Make sure IRQ's are disabled */ 297 IRQdisable; 298 299 if (howto & RB_HALT) { 300 printf("\r\n"); 301 printf("The operating system has halted.\r\n"); 302 printf("Please press any key to reboot.\r\n"); 303 cngetc(); 304 } 305 306 printf("\r\nrebooting...\r\n"); 307 reset: 308 /* 309 * Make really really sure that all interrupts are disabled, 310 * and poke the Internal Bus and Peripheral Bus reset lines. 311 */ 312 (void) disable_interrupts(I32_bit|F32_bit); 313 314 { 315 u_int32_t feed, ctrl; 316 317 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 318 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 319 320 __asm volatile ( 321 "mov r0, #0x5\n" 322 "mov r1, #0x1\n" 323 "strh r0, [%0]\n" 324 "strh r1, [%1]\n" 325 : 326 : "r" (feed), "r" (ctrl) 327 : "r0", "r1" 328 ); 329 } 330 331 for (;;); 332 } 333 334 /* Static device mappings. */ 335 static const struct pmap_devmap tsarm_devmap[] = { 336 { 337 EP93XX_AHB_VBASE, 338 EP93XX_AHB_HWBASE, 339 EP93XX_AHB_SIZE, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE, 342 }, 343 344 { 345 EP93XX_APB_VBASE, 346 EP93XX_APB_HWBASE, 347 EP93XX_APB_SIZE, 348 VM_PROT_READ|VM_PROT_WRITE, 349 PTE_NOCACHE, 350 }, 351 352 /* 353 * IO8 and IO16 space *must* be mapped contiguously with 354 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 355 * on that! 356 */ 357 { 358 TS7XXX_IO8_VBASE, 359 TS7XXX_IO8_HWBASE, 360 TS7XXX_IO8_SIZE, 361 VM_PROT_READ|VM_PROT_WRITE, 362 PTE_NOCACHE, 363 }, 364 365 { 366 TS7XXX_IO16_VBASE, 367 TS7XXX_IO16_HWBASE, 368 TS7XXX_IO16_SIZE, 369 VM_PROT_READ|VM_PROT_WRITE, 370 PTE_NOCACHE, 371 }, 372 373 { 374 0, 375 0, 376 0, 377 0, 378 0, 379 } 380 }; 381 382 /* 383 * u_int initarm(...) 384 * 385 * Initial entry point on startup. This gets called before main() is 386 * entered. 387 * It should be responsible for setting up everything that must be 388 * in place when main is called. 389 * This includes 390 * Taking a copy of the boot configuration structure. 391 * Initialising the physical console so characters can be printed. 392 * Setting up page tables for the kernel 393 * Initialising interrupt controllers to a sane default state 394 */ 395 u_int 396 initarm(void *arg) 397 { 398 #ifdef FIXME 399 struct bootconfig *passed_bootconfig = arg; 400 extern char _end[]; 401 #endif 402 int loop; 403 int loop1; 404 u_int l1pagetable; 405 pv_addr_t kernel_l1pt; 406 paddr_t memstart; 407 psize_t memsize; 408 409 #ifdef FIXME 410 /* Calibrate the delay loop. */ 411 i80321_calibrate_delay(); 412 #endif 413 414 /* 415 * Since we map the on-board devices VA==PA, and the kernel 416 * is running VA==PA, it's possible for us to initialize 417 * the console now. 418 */ 419 consinit(); 420 421 #ifdef VERBOSE_INIT_ARM 422 /* Talk to the user */ 423 printf("\nNetBSD/tsarm booting ...\n"); 424 #endif 425 426 /* 427 * Heads up ... Setup the CPU / MMU / TLB functions 428 */ 429 if (set_cpufuncs()) 430 panic("cpu not recognized!"); 431 432 /* 433 * We are currently running with the MMU enabled 434 */ 435 436 #ifdef FIXME 437 /* 438 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 439 * registers. 440 */ 441 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 442 &memstart, &memsize); 443 #else 444 memstart = 0x0; 445 memsize = 0x2000000; 446 #endif 447 448 #ifdef VERBOSE_INIT_ARM 449 printf("initarm: Configuring system ...\n"); 450 #endif 451 452 /* Fake bootconfig structure for the benefit of pmap.c */ 453 /* XXX must make the memory description h/w independent */ 454 bootconfig.dramblocks = 4; 455 bootconfig.dram[0].address = 0x0UL; 456 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 457 bootconfig.dram[1].address = 0x1000000UL; 458 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 459 bootconfig.dram[2].address = 0x4000000UL; 460 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 461 bootconfig.dram[3].address = 0x5000000UL; 462 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 463 464 /* 465 * Set up the variables that define the availablilty of 466 * physical memory. For now, we're going to set 467 * physical_freestart to 0x00200000 (where the kernel 468 * was loaded), and allocate the memory we need downwards. 469 * If we get too close to the L1 table that we set up, we 470 * will panic. We will update physical_freestart and 471 * physical_freeend later to reflect what pmap_bootstrap() 472 * wants to see. 473 * 474 * XXX pmap_bootstrap() needs an enema. 475 */ 476 physical_start = bootconfig.dram[0].address; 477 physical_end = bootconfig.dram[0].address + 478 (bootconfig.dram[0].pages * PAGE_SIZE); 479 480 physical_freestart = 0x00009000UL; 481 physical_freeend = 0x00200000UL; 482 483 physmem = (physical_end - physical_start) / PAGE_SIZE; 484 485 #ifdef VERBOSE_INIT_ARM 486 /* Tell the user about the memory */ 487 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 488 physical_start, physical_end - 1); 489 #endif 490 491 /* 492 * Okay, the kernel starts 2MB in from the bottom of physical 493 * memory. We are going to allocate our bootstrap pages downwards 494 * from there. 495 * 496 * We need to allocate some fixed page tables to get the kernel 497 * going. We allocate one page directory and a number of page 498 * tables and store the physical addresses in the kernel_pt_table 499 * array. 500 * 501 * The kernel page directory must be on a 16K boundary. The page 502 * tables must be on 4K bounaries. What we do is allocate the 503 * page directory on the first 16K boundary that we encounter, and 504 * the page tables on 4K boundaries otherwise. Since we allocate 505 * at least 3 L2 page tables, we are guaranteed to encounter at 506 * least one 16K aligned region. 507 */ 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("Allocating page tables\n"); 511 #endif 512 513 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 517 physical_freestart, free_pages, free_pages); 518 #endif 519 520 /* Define a macro to simplify memory allocation */ 521 #define valloc_pages(var, np) \ 522 alloc_pages((var).pv_pa, (np)); \ 523 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 524 525 #define alloc_pages(var, np) \ 526 physical_freeend -= ((np) * PAGE_SIZE); \ 527 if (physical_freeend < physical_freestart) \ 528 panic("initarm: out of memory"); \ 529 (var) = physical_freeend; \ 530 free_pages -= (np); \ 531 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 532 533 loop1 = 0; 534 kernel_l1pt.pv_pa = 0; 535 kernel_l1pt.pv_va = 0; 536 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 537 /* Are we 16KB aligned for an L1 ? */ 538 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 539 && kernel_l1pt.pv_pa == 0) { 540 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 541 } else { 542 valloc_pages(kernel_pt_table[loop1], 543 L2_TABLE_SIZE / PAGE_SIZE); 544 ++loop1; 545 } 546 } 547 548 /* This should never be able to happen but better confirm that. */ 549 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 550 panic("initarm: Failed to align the kernel page directory"); 551 552 /* 553 * Allocate a page for the system vectors page 554 */ 555 alloc_pages(systempage.pv_pa, 1); 556 557 /* Allocate stacks for all modes */ 558 valloc_pages(irqstack, IRQ_STACK_SIZE); 559 valloc_pages(abtstack, ABT_STACK_SIZE); 560 valloc_pages(undstack, UND_STACK_SIZE); 561 valloc_pages(kernelstack, UPAGES); 562 563 #ifdef VERBOSE_INIT_ARM 564 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 565 irqstack.pv_va); 566 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 567 abtstack.pv_va); 568 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 569 undstack.pv_va); 570 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 571 kernelstack.pv_va); 572 #endif 573 574 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 575 576 /* 577 * Ok we have allocated physical pages for the primary kernel 578 * page tables. Save physical_freeend for when we give whats left 579 * of memory below 2Mbyte to UVM. 580 */ 581 582 physical_freeend_low = physical_freeend; 583 584 #ifdef VERBOSE_INIT_ARM 585 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 586 #endif 587 588 /* 589 * Now we start construction of the L1 page table 590 * We start by mapping the L2 page tables into the L1. 591 * This means that we can replace L1 mappings later on if necessary 592 */ 593 l1pagetable = kernel_l1pt.pv_pa; 594 595 /* Map the L2 pages tables in the L1 page table */ 596 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 597 &kernel_pt_table[KERNEL_PT_SYS]); 598 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 599 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 600 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 601 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 602 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 603 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 604 605 /* update the top of the kernel VM */ 606 pmap_curmaxkvaddr = 607 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 608 609 #ifdef VERBOSE_INIT_ARM 610 printf("Mapping kernel\n"); 611 #endif 612 613 /* Now we fill in the L2 pagetable for the kernel static code/data */ 614 { 615 extern char etext[], _end[]; 616 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 617 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 618 u_int logical; 619 620 textsize = (textsize + PGOFSET) & ~PGOFSET; 621 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 622 623 logical = 0x00200000; /* offset of kernel in RAM */ 624 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 625 physical_start + logical, textsize, 626 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 627 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 628 physical_start + logical, totalsize - textsize, 629 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 } 631 632 #ifdef VERBOSE_INIT_ARM 633 printf("Constructing L2 page tables\n"); 634 #endif 635 636 /* Map the stack pages */ 637 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 638 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 640 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 642 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 644 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 646 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 647 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 648 649 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 650 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 651 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 652 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 653 } 654 655 /* Map the vector page. */ 656 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 657 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 658 659 /* Map the statically mapped devices. */ 660 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 661 662 /* 663 * Update the physical_freestart/physical_freeend/free_pages 664 * variables. 665 */ 666 { 667 extern char _end[]; 668 669 physical_freestart = physical_start + 670 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 671 KERNEL_BASE); 672 physical_freeend = physical_end; 673 free_pages = 674 (physical_freeend - physical_freestart) / PAGE_SIZE; 675 } 676 677 /* 678 * Now we have the real page tables in place so we can switch to them. 679 * Once this is done we will be running with the REAL kernel page 680 * tables. 681 */ 682 683 /* Switch tables */ 684 #ifdef VERBOSE_INIT_ARM 685 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 686 physical_freestart, free_pages, free_pages); 687 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 688 #endif 689 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 690 setttb(kernel_l1pt.pv_pa); 691 cpu_tlb_flushID(); 692 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 693 694 /* 695 * Moved from cpu_startup() as data_abort_handler() references 696 * this during uvm init 697 */ 698 proc0paddr = (struct user *)kernelstack.pv_va; 699 lwp0.l_addr = proc0paddr; 700 701 #ifdef VERBOSE_INIT_ARM 702 printf("done!\n"); 703 #endif 704 705 #ifdef VERBOSE_INIT_ARM 706 printf("bootstrap done.\n"); 707 #endif 708 709 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 710 711 /* 712 * Pages were allocated during the secondary bootstrap for the 713 * stacks for different CPU modes. 714 * We must now set the r13 registers in the different CPU modes to 715 * point to these stacks. 716 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 717 * of the stack memory. 718 */ 719 #ifdef VERBOSE_INIT_ARM 720 printf("init subsystems: stacks "); 721 #endif 722 723 set_stackptr(PSR_IRQ32_MODE, 724 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 725 set_stackptr(PSR_ABT32_MODE, 726 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 727 set_stackptr(PSR_UND32_MODE, 728 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 729 730 /* 731 * Well we should set a data abort handler. 732 * Once things get going this will change as we will need a proper 733 * handler. 734 * Until then we will use a handler that just panics but tells us 735 * why. 736 * Initialisation of the vectors will just panic on a data abort. 737 * This just fills in a slightly better one. 738 */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("vectors "); 741 #endif 742 data_abort_handler_address = (u_int)data_abort_handler; 743 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 744 undefined_handler_address = (u_int)undefinedinstruction_bounce; 745 746 /* Initialise the undefined instruction handlers */ 747 #ifdef VERBOSE_INIT_ARM 748 printf("undefined "); 749 #endif 750 undefined_init(); 751 752 /* Load memory into UVM. */ 753 #ifdef VERBOSE_INIT_ARM 754 printf("page "); 755 #endif 756 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 757 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 758 atop(physical_freestart), atop(physical_freeend), 759 VM_FREELIST_DEFAULT); 760 uvm_page_physload(0, atop(physical_freeend_low), 761 0, atop(physical_freeend_low), 762 VM_FREELIST_DEFAULT); 763 /* 764 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 765 * we've only been working with the first one mapped at 0x0. Tell 766 * UVM about the others. 767 */ 768 uvm_page_physload(atop(0x1000000), atop(0x1800000), 769 atop(0x1000000), atop(0x1800000), 770 VM_FREELIST_DEFAULT); 771 uvm_page_physload(atop(0x4000000), atop(0x4800000), 772 atop(0x4000000), atop(0x4800000), 773 VM_FREELIST_DEFAULT); 774 uvm_page_physload(atop(0x5000000), atop(0x5800000), 775 atop(0x5000000), atop(0x5800000), 776 VM_FREELIST_DEFAULT); 777 778 physmem = 0x2000000 / PAGE_SIZE; 779 780 781 /* Boot strap pmap telling it where the kernel page table is */ 782 #ifdef VERBOSE_INIT_ARM 783 printf("pmap "); 784 #endif 785 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 786 KERNEL_VM_BASE + KERNEL_VM_SIZE); 787 788 /* Setup the IRQ system */ 789 #ifdef VERBOSE_INIT_ARM 790 printf("irq "); 791 #endif 792 ep93xx_intr_init(); 793 #if NISA > 0 794 isa_intr_init(); 795 796 #ifdef VERBOSE_INIT_ARM 797 printf("isa "); 798 #endif 799 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 800 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 801 #endif 802 803 #ifdef VERBOSE_INIT_ARM 804 printf("done.\n"); 805 #endif 806 807 #ifdef BOOTHOWTO 808 boothowto = BOOTHOWTO; 809 #endif 810 811 #ifdef IPKDB 812 /* Initialise ipkdb */ 813 ipkdb_init(); 814 if (boothowto & RB_KDB) 815 ipkdb_connect(0); 816 #endif 817 818 #if NKSYMS || defined(DDB) || defined(LKM) 819 /* Firmware doesn't load symbols. */ 820 ksyms_init(0, NULL, NULL); 821 #endif 822 823 #ifdef DDB 824 db_machine_init(); 825 if (boothowto & RB_KDB) 826 Debugger(); 827 #endif 828 829 /* We return the new stack pointer address */ 830 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 831 } 832 833 void 834 consinit(void) 835 { 836 static int consinit_called; 837 bus_space_handle_t ioh; 838 839 if (consinit_called != 0) 840 return; 841 842 consinit_called = 1; 843 844 /* 845 * Console devices are already mapped in VA. Our devmap reflects 846 * this, so register it now so drivers can map the console 847 * device. 848 */ 849 pmap_devmap_register(tsarm_devmap); 850 #if 0 851 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 852 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 853 854 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 855 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 856 { 857 panic("can't init serial console"); 858 } 859 #endif 860 861 #if NEPCOM > 0 862 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 863 EP93XX_APB_UART_SIZE, 0, &ioh); 864 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 865 ioh, comcnspeed, comcnmode)) 866 { 867 panic("can't init serial console"); 868 } 869 #else 870 panic("serial console not configured"); 871 #endif 872 #if KGDB 873 #if NEPCOM > 0 874 if (strcmp(kgdb_devname, "epcom") == 0) { 875 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 876 kgdb_devmode); 877 } 878 #endif /* NEPCOM > 0 */ 879 #endif /* KGDB */ 880 } 881 882 883 bus_dma_tag_t 884 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 885 { 886 int i; 887 struct arm32_bus_dma_tag *dmat; 888 889 for (i = 0; i < bootconfig.dramblocks; i++) { 890 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 891 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 892 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 893 PAGE_SIZE; 894 } 895 896 dmat = dma_tag_template; 897 898 dmat->_ranges = tsarm_dma_ranges; 899 dmat->_nranges = bootconfig.dramblocks; 900 901 return dmat; 902 } 903
Indexes created Fri Oct 03 02:09:57 GMT 2025