tsarm_machdep.c revision 1.14
1 /* $NetBSD: tsarm_machdep.c,v 1.14 2009/12/26 16:01:25 uebayasi 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 1.14 2009/12/26 16:01:25 uebayasi 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; 165 166 /* Physical and virtual addresses for some global pages */ 167 pv_addr_t irqstack; 168 pv_addr_t undstack; 169 pv_addr_t abtstack; 170 pv_addr_t kernelstack; 171 172 vm_offset_t msgbufphys; 173 174 static struct arm32_dma_range tsarm_dma_ranges[4]; 175 176 #if NISA > 0 177 extern void isa_tsarm_init(u_int, u_int); 178 #endif 179 180 extern u_int data_abort_handler_address; 181 extern u_int prefetch_abort_handler_address; 182 extern u_int undefined_handler_address; 183 184 #ifdef PMAP_DEBUG 185 extern int pmap_debug_level; 186 #endif 187 188 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 189 190 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 191 #define KERNEL_PT_KERNEL_NUM 4 192 /* L2 tables for mapping kernel VM */ 193 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 194 195 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 196 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 197 198 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 199 200 /* Prototypes */ 201 202 void consinit(void); 203 /* 204 * Define the default console speed for the machine. 205 */ 206 #ifndef CONSPEED 207 #define CONSPEED B115200 208 #endif /* ! CONSPEED */ 209 210 #ifndef CONMODE 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 212 #endif 213 214 int comcnspeed = CONSPEED; 215 int comcnmode = CONMODE; 216 217 #if KGDB 218 #ifndef KGDB_DEVNAME 219 #error Must define KGDB_DEVNAME 220 #endif 221 const char kgdb_devname[] = KGDB_DEVNAME; 222 223 #ifndef KGDB_DEVADDR 224 #error Must define KGDB_DEVADDR 225 #endif 226 unsigned long kgdb_devaddr = KGDB_DEVADDR; 227 228 #ifndef KGDB_DEVRATE 229 #define KGDB_DEVRATE CONSPEED 230 #endif 231 int kgdb_devrate = KGDB_DEVRATE; 232 233 #ifndef KGDB_DEVMODE 234 #define KGDB_DEVMODE CONMODE 235 #endif 236 int kgdb_devmode = KGDB_DEVMODE; 237 #endif /* KGDB */ 238 239 /* 240 * void cpu_reboot(int howto, char *bootstr) 241 * 242 * Reboots the system 243 * 244 * Deal with any syncing, unmounting, dumping and shutdown hooks, 245 * then reset the CPU. 246 */ 247 void 248 cpu_reboot(int howto, char *bootstr) 249 { 250 251 /* 252 * If we are still cold then hit the air brakes 253 * and crash to earth fast 254 */ 255 if (cold) { 256 doshutdownhooks(); 257 pmf_system_shutdown(boothowto); 258 printf("\r\n"); 259 printf("The operating system has halted.\r\n"); 260 printf("Please press any key to reboot.\r\n"); 261 cngetc(); 262 printf("\r\nrebooting...\r\n"); 263 goto reset; 264 } 265 266 /* Disable console buffering */ 267 268 /* 269 * If RB_NOSYNC was not specified sync the discs. 270 * Note: Unless cold is set to 1 here, syslogd will die during the 271 * unmount. It looks like syslogd is getting woken up only to find 272 * that it cannot page part of the binary in as the filesystem has 273 * been unmounted. 274 */ 275 if (!(howto & RB_NOSYNC)) 276 bootsync(); 277 278 /* Say NO to interrupts */ 279 splhigh(); 280 281 /* Do a dump if requested. */ 282 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 283 dumpsys(); 284 285 /* Run any shutdown hooks */ 286 doshutdownhooks(); 287 288 pmf_system_shutdown(boothowto); 289 290 /* Make sure IRQ's are disabled */ 291 IRQdisable; 292 293 if (howto & RB_HALT) { 294 printf("\r\n"); 295 printf("The operating system has halted.\r\n"); 296 printf("Please press any key to reboot.\r\n"); 297 cngetc(); 298 } 299 300 printf("\r\nrebooting...\r\n"); 301 reset: 302 /* 303 * Make really really sure that all interrupts are disabled, 304 * and poke the Internal Bus and Peripheral Bus reset lines. 305 */ 306 (void) disable_interrupts(I32_bit|F32_bit); 307 308 { 309 u_int32_t feed, ctrl; 310 311 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 312 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 313 314 __asm volatile ( 315 "mov r0, #0x5\n" 316 "mov r1, #0x1\n" 317 "strh r0, [%0]\n" 318 "strh r1, [%1]\n" 319 : 320 : "r" (feed), "r" (ctrl) 321 : "r0", "r1" 322 ); 323 } 324 325 for (;;); 326 } 327 328 /* Static device mappings. */ 329 static const struct pmap_devmap tsarm_devmap[] = { 330 { 331 EP93XX_AHB_VBASE, 332 EP93XX_AHB_HWBASE, 333 EP93XX_AHB_SIZE, 334 VM_PROT_READ|VM_PROT_WRITE, 335 PTE_NOCACHE, 336 }, 337 338 { 339 EP93XX_APB_VBASE, 340 EP93XX_APB_HWBASE, 341 EP93XX_APB_SIZE, 342 VM_PROT_READ|VM_PROT_WRITE, 343 PTE_NOCACHE, 344 }, 345 346 /* 347 * IO8 and IO16 space *must* be mapped contiguously with 348 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 349 * on that! 350 */ 351 { 352 TS7XXX_IO8_VBASE, 353 TS7XXX_IO8_HWBASE, 354 TS7XXX_IO8_SIZE, 355 VM_PROT_READ|VM_PROT_WRITE, 356 PTE_NOCACHE, 357 }, 358 359 { 360 TS7XXX_IO16_VBASE, 361 TS7XXX_IO16_HWBASE, 362 TS7XXX_IO16_SIZE, 363 VM_PROT_READ|VM_PROT_WRITE, 364 PTE_NOCACHE, 365 }, 366 367 { 368 0, 369 0, 370 0, 371 0, 372 0, 373 } 374 }; 375 376 /* 377 * u_int initarm(...) 378 * 379 * Initial entry point on startup. This gets called before main() is 380 * entered. 381 * It should be responsible for setting up everything that must be 382 * in place when main is called. 383 * This includes 384 * Taking a copy of the boot configuration structure. 385 * Initialising the physical console so characters can be printed. 386 * Setting up page tables for the kernel 387 * Initialising interrupt controllers to a sane default state 388 */ 389 u_int 390 initarm(void *arg) 391 { 392 #ifdef FIXME 393 struct bootconfig *passed_bootconfig = arg; 394 extern char _end[]; 395 #endif 396 int loop; 397 int loop1; 398 u_int l1pagetable; 399 paddr_t memstart; 400 psize_t memsize; 401 402 #ifdef FIXME 403 /* Calibrate the delay loop. */ 404 i80321_calibrate_delay(); 405 #endif 406 407 /* 408 * Since we map the on-board devices VA==PA, and the kernel 409 * is running VA==PA, it's possible for us to initialize 410 * the console now. 411 */ 412 consinit(); 413 414 #ifdef VERBOSE_INIT_ARM 415 /* Talk to the user */ 416 printf("\nNetBSD/tsarm booting ...\n"); 417 #endif 418 419 /* 420 * Heads up ... Setup the CPU / MMU / TLB functions 421 */ 422 if (set_cpufuncs()) 423 panic("cpu not recognized!"); 424 425 /* 426 * We are currently running with the MMU enabled 427 */ 428 429 #ifdef FIXME 430 /* 431 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 432 * registers. 433 */ 434 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 435 &memstart, &memsize); 436 #else 437 memstart = 0x0; 438 memsize = 0x2000000; 439 #endif 440 441 #ifdef VERBOSE_INIT_ARM 442 printf("initarm: Configuring system ...\n"); 443 #endif 444 445 /* Fake bootconfig structure for the benefit of pmap.c */ 446 /* XXX must make the memory description h/w independent */ 447 bootconfig.dramblocks = 4; 448 bootconfig.dram[0].address = 0x0UL; 449 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 450 bootconfig.dram[1].address = 0x1000000UL; 451 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 452 bootconfig.dram[2].address = 0x4000000UL; 453 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 454 bootconfig.dram[3].address = 0x5000000UL; 455 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 456 457 /* 458 * Set up the variables that define the availablilty of 459 * physical memory. For now, we're going to set 460 * physical_freestart to 0x00200000 (where the kernel 461 * was loaded), and allocate the memory we need downwards. 462 * If we get too close to the L1 table that we set up, we 463 * will panic. We will update physical_freestart and 464 * physical_freeend later to reflect what pmap_bootstrap() 465 * wants to see. 466 * 467 * XXX pmap_bootstrap() needs an enema. 468 */ 469 physical_start = bootconfig.dram[0].address; 470 physical_end = bootconfig.dram[0].address + 471 (bootconfig.dram[0].pages * PAGE_SIZE); 472 473 physical_freestart = 0x00009000UL; 474 physical_freeend = 0x00200000UL; 475 476 physmem = (physical_end - physical_start) / PAGE_SIZE; 477 478 #ifdef VERBOSE_INIT_ARM 479 /* Tell the user about the memory */ 480 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 481 physical_start, physical_end - 1); 482 #endif 483 484 /* 485 * Okay, the kernel starts 2MB in from the bottom of physical 486 * memory. We are going to allocate our bootstrap pages downwards 487 * from there. 488 * 489 * We need to allocate some fixed page tables to get the kernel 490 * going. We allocate one page directory and a number of page 491 * tables and store the physical addresses in the kernel_pt_table 492 * array. 493 * 494 * The kernel page directory must be on a 16K boundary. The page 495 * tables must be on 4K bounaries. What we do is allocate the 496 * page directory on the first 16K boundary that we encounter, and 497 * the page tables on 4K boundaries otherwise. Since we allocate 498 * at least 3 L2 page tables, we are guaranteed to encounter at 499 * least one 16K aligned region. 500 */ 501 502 #ifdef VERBOSE_INIT_ARM 503 printf("Allocating page tables\n"); 504 #endif 505 506 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 507 508 #ifdef VERBOSE_INIT_ARM 509 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 510 physical_freestart, free_pages, free_pages); 511 #endif 512 513 /* Define a macro to simplify memory allocation */ 514 #define valloc_pages(var, np) \ 515 alloc_pages((var).pv_pa, (np)); \ 516 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 517 518 #define alloc_pages(var, np) \ 519 physical_freeend -= ((np) * PAGE_SIZE); \ 520 if (physical_freeend < physical_freestart) \ 521 panic("initarm: out of memory"); \ 522 (var) = physical_freeend; \ 523 free_pages -= (np); \ 524 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 525 526 loop1 = 0; 527 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 528 /* Are we 16KB aligned for an L1 ? */ 529 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 530 && kernel_l1pt.pv_pa == 0) { 531 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 532 } else { 533 valloc_pages(kernel_pt_table[loop1], 534 L2_TABLE_SIZE / PAGE_SIZE); 535 ++loop1; 536 } 537 } 538 539 /* This should never be able to happen but better confirm that. */ 540 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 541 panic("initarm: Failed to align the kernel page directory"); 542 543 /* 544 * Allocate a page for the system vectors page 545 */ 546 alloc_pages(systempage.pv_pa, 1); 547 548 /* Allocate stacks for all modes */ 549 valloc_pages(irqstack, IRQ_STACK_SIZE); 550 valloc_pages(abtstack, ABT_STACK_SIZE); 551 valloc_pages(undstack, UND_STACK_SIZE); 552 valloc_pages(kernelstack, UPAGES); 553 554 #ifdef VERBOSE_INIT_ARM 555 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 556 irqstack.pv_va); 557 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 558 abtstack.pv_va); 559 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 560 undstack.pv_va); 561 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 562 kernelstack.pv_va); 563 #endif 564 565 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 566 567 /* 568 * Ok we have allocated physical pages for the primary kernel 569 * page tables. Save physical_freeend for when we give whats left 570 * of memory below 2Mbyte to UVM. 571 */ 572 573 physical_freeend_low = physical_freeend; 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 577 #endif 578 579 /* 580 * Now we start construction of the L1 page table 581 * We start by mapping the L2 page tables into the L1. 582 * This means that we can replace L1 mappings later on if necessary 583 */ 584 l1pagetable = kernel_l1pt.pv_pa; 585 586 /* Map the L2 pages tables in the L1 page table */ 587 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 588 &kernel_pt_table[KERNEL_PT_SYS]); 589 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 590 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 591 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 592 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 593 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 594 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 595 596 /* update the top of the kernel VM */ 597 pmap_curmaxkvaddr = 598 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 599 600 #ifdef VERBOSE_INIT_ARM 601 printf("Mapping kernel\n"); 602 #endif 603 604 /* Now we fill in the L2 pagetable for the kernel static code/data */ 605 { 606 extern char etext[], _end[]; 607 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 608 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 609 u_int logical; 610 611 textsize = (textsize + PGOFSET) & ~PGOFSET; 612 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 613 614 logical = 0x00200000; /* offset of kernel in RAM */ 615 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 616 physical_start + logical, textsize, 617 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 618 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 619 physical_start + logical, totalsize - textsize, 620 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 621 } 622 623 #ifdef VERBOSE_INIT_ARM 624 printf("Constructing L2 page tables\n"); 625 #endif 626 627 /* Map the stack pages */ 628 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 629 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 631 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 633 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 634 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 635 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 636 637 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 638 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 639 640 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 641 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 642 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 643 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 644 } 645 646 /* Map the vector page. */ 647 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 648 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 649 650 /* Map the statically mapped devices. */ 651 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 652 653 /* 654 * Update the physical_freestart/physical_freeend/free_pages 655 * variables. 656 */ 657 { 658 extern char _end[]; 659 660 physical_freestart = physical_start + 661 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 662 KERNEL_BASE); 663 physical_freeend = physical_end; 664 free_pages = 665 (physical_freeend - physical_freestart) / PAGE_SIZE; 666 } 667 668 /* 669 * Now we have the real page tables in place so we can switch to them. 670 * Once this is done we will be running with the REAL kernel page 671 * tables. 672 */ 673 674 /* Switch tables */ 675 #ifdef VERBOSE_INIT_ARM 676 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 677 physical_freestart, free_pages, free_pages); 678 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 679 #endif 680 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 681 cpu_setttb(kernel_l1pt.pv_pa); 682 cpu_tlb_flushID(); 683 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 684 685 /* 686 * Moved from cpu_startup() as data_abort_handler() references 687 * this during uvm init 688 */ 689 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("done!\n"); 693 #endif 694 695 #ifdef VERBOSE_INIT_ARM 696 printf("bootstrap done.\n"); 697 #endif 698 699 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 700 701 /* 702 * Pages were allocated during the secondary bootstrap for the 703 * stacks for different CPU modes. 704 * We must now set the r13 registers in the different CPU modes to 705 * point to these stacks. 706 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 707 * of the stack memory. 708 */ 709 #ifdef VERBOSE_INIT_ARM 710 printf("init subsystems: stacks "); 711 #endif 712 713 set_stackptr(PSR_IRQ32_MODE, 714 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 715 set_stackptr(PSR_ABT32_MODE, 716 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 717 set_stackptr(PSR_UND32_MODE, 718 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 719 720 /* 721 * Well we should set a data abort handler. 722 * Once things get going this will change as we will need a proper 723 * handler. 724 * Until then we will use a handler that just panics but tells us 725 * why. 726 * Initialisation of the vectors will just panic on a data abort. 727 * This just fills in a slightly better one. 728 */ 729 #ifdef VERBOSE_INIT_ARM 730 printf("vectors "); 731 #endif 732 data_abort_handler_address = (u_int)data_abort_handler; 733 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 734 undefined_handler_address = (u_int)undefinedinstruction_bounce; 735 736 /* Initialise the undefined instruction handlers */ 737 #ifdef VERBOSE_INIT_ARM 738 printf("undefined "); 739 #endif 740 undefined_init(); 741 742 /* Load memory into UVM. */ 743 #ifdef VERBOSE_INIT_ARM 744 printf("page "); 745 #endif 746 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 747 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 748 atop(physical_freestart), atop(physical_freeend), 749 VM_FREELIST_DEFAULT); 750 uvm_page_physload(0, atop(physical_freeend_low), 751 0, atop(physical_freeend_low), 752 VM_FREELIST_DEFAULT); 753 /* 754 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 755 * we've only been working with the first one mapped at 0x0. Tell 756 * UVM about the others. 757 */ 758 uvm_page_physload(atop(0x1000000), atop(0x1800000), 759 atop(0x1000000), atop(0x1800000), 760 VM_FREELIST_DEFAULT); 761 uvm_page_physload(atop(0x4000000), atop(0x4800000), 762 atop(0x4000000), atop(0x4800000), 763 VM_FREELIST_DEFAULT); 764 uvm_page_physload(atop(0x5000000), atop(0x5800000), 765 atop(0x5000000), atop(0x5800000), 766 VM_FREELIST_DEFAULT); 767 768 physmem = 0x2000000 / PAGE_SIZE; 769 770 771 /* Boot strap pmap telling it where the kernel page table is */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("pmap "); 774 #endif 775 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 776 777 /* Setup the IRQ system */ 778 #ifdef VERBOSE_INIT_ARM 779 printf("irq "); 780 #endif 781 ep93xx_intr_init(); 782 #if NISA > 0 783 isa_intr_init(); 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("isa "); 787 #endif 788 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 789 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 790 #endif 791 792 #ifdef VERBOSE_INIT_ARM 793 printf("done.\n"); 794 #endif 795 796 #ifdef BOOTHOWTO 797 boothowto = BOOTHOWTO; 798 #endif 799 800 #ifdef DDB 801 db_machine_init(); 802 if (boothowto & RB_KDB) 803 Debugger(); 804 #endif 805 806 /* We return the new stack pointer address */ 807 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 808 } 809 810 void 811 consinit(void) 812 { 813 static int consinit_called; 814 bus_space_handle_t ioh; 815 816 if (consinit_called != 0) 817 return; 818 819 consinit_called = 1; 820 821 /* 822 * Console devices are already mapped in VA. Our devmap reflects 823 * this, so register it now so drivers can map the console 824 * device. 825 */ 826 pmap_devmap_register(tsarm_devmap); 827 #if 0 828 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 829 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 830 831 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 832 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 833 { 834 panic("can't init serial console"); 835 } 836 #endif 837 838 #if NEPCOM > 0 839 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 840 EP93XX_APB_UART_SIZE, 0, &ioh); 841 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 842 ioh, comcnspeed, comcnmode)) 843 { 844 panic("can't init serial console"); 845 } 846 #else 847 panic("serial console not configured"); 848 #endif 849 #if KGDB 850 #if NEPCOM > 0 851 if (strcmp(kgdb_devname, "epcom") == 0) { 852 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 853 kgdb_devmode); 854 } 855 #endif /* NEPCOM > 0 */ 856 #endif /* KGDB */ 857 } 858 859 860 bus_dma_tag_t 861 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 862 { 863 int i; 864 struct arm32_bus_dma_tag *dmat; 865 866 for (i = 0; i < bootconfig.dramblocks; i++) { 867 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 868 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 869 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 870 PAGE_SIZE; 871 } 872 873 dmat = dma_tag_template; 874 875 dmat->_ranges = tsarm_dma_ranges; 876 dmat->_nranges = bootconfig.dramblocks; 877 878 return dmat; 879 } 880
Indexes created Fri Oct 03 02:09:57 GMT 2025