tsarm_machdep.c revision 1.17
1 /* $NetBSD: tsarm_machdep.c,v 1.17 2012/07/29 00:07:09 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 1.17 2012/07/29 00:07:09 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 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 <sys/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 dependent 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 vm_offset_t msgbufphys; 167 168 static struct arm32_dma_range tsarm_dma_ranges[4]; 169 170 #if NISA > 0 171 extern void isa_tsarm_init(u_int, u_int); 172 #endif 173 174 #ifdef PMAP_DEBUG 175 extern int pmap_debug_level; 176 #endif 177 178 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 179 180 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 181 #define KERNEL_PT_KERNEL_NUM 4 182 /* L2 tables for mapping kernel VM */ 183 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 184 185 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 186 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 187 188 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 189 190 /* Prototypes */ 191 192 void consinit(void); 193 /* 194 * Define the default console speed for the machine. 195 */ 196 #ifndef CONSPEED 197 #define CONSPEED B115200 198 #endif /* ! CONSPEED */ 199 200 #ifndef CONMODE 201 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 202 #endif 203 204 int comcnspeed = CONSPEED; 205 int comcnmode = CONMODE; 206 207 #if KGDB 208 #ifndef KGDB_DEVNAME 209 #error Must define KGDB_DEVNAME 210 #endif 211 const char kgdb_devname[] = KGDB_DEVNAME; 212 213 #ifndef KGDB_DEVADDR 214 #error Must define KGDB_DEVADDR 215 #endif 216 unsigned long kgdb_devaddr = KGDB_DEVADDR; 217 218 #ifndef KGDB_DEVRATE 219 #define KGDB_DEVRATE CONSPEED 220 #endif 221 int kgdb_devrate = KGDB_DEVRATE; 222 223 #ifndef KGDB_DEVMODE 224 #define KGDB_DEVMODE CONMODE 225 #endif 226 int kgdb_devmode = KGDB_DEVMODE; 227 #endif /* KGDB */ 228 229 /* 230 * void cpu_reboot(int howto, char *bootstr) 231 * 232 * Reboots the system 233 * 234 * Deal with any syncing, unmounting, dumping and shutdown hooks, 235 * then reset the CPU. 236 */ 237 void 238 cpu_reboot(int howto, char *bootstr) 239 { 240 241 /* 242 * If we are still cold then hit the air brakes 243 * and crash to earth fast 244 */ 245 if (cold) { 246 doshutdownhooks(); 247 pmf_system_shutdown(boothowto); 248 printf("\r\n"); 249 printf("The operating system has halted.\r\n"); 250 printf("Please press any key to reboot.\r\n"); 251 cngetc(); 252 printf("\r\nrebooting...\r\n"); 253 goto reset; 254 } 255 256 /* Disable console buffering */ 257 258 /* 259 * If RB_NOSYNC was not specified sync the discs. 260 * Note: Unless cold is set to 1 here, syslogd will die during the 261 * unmount. It looks like syslogd is getting woken up only to find 262 * that it cannot page part of the binary in as the filesystem has 263 * been unmounted. 264 */ 265 if (!(howto & RB_NOSYNC)) 266 bootsync(); 267 268 /* Say NO to interrupts */ 269 splhigh(); 270 271 /* Do a dump if requested. */ 272 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 273 dumpsys(); 274 275 /* Run any shutdown hooks */ 276 doshutdownhooks(); 277 278 pmf_system_shutdown(boothowto); 279 280 /* Make sure IRQ's are disabled */ 281 IRQdisable; 282 283 if (howto & RB_HALT) { 284 printf("\r\n"); 285 printf("The operating system has halted.\r\n"); 286 printf("Please press any key to reboot.\r\n"); 287 cngetc(); 288 } 289 290 printf("\r\nrebooting...\r\n"); 291 reset: 292 /* 293 * Make really really sure that all interrupts are disabled, 294 * and poke the Internal Bus and Peripheral Bus reset lines. 295 */ 296 (void) disable_interrupts(I32_bit|F32_bit); 297 298 { 299 u_int32_t feed, ctrl; 300 301 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 302 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 303 304 __asm volatile ( 305 "mov r0, #0x5\n" 306 "mov r1, #0x1\n" 307 "strh r0, [%0]\n" 308 "strh r1, [%1]\n" 309 : 310 : "r" (feed), "r" (ctrl) 311 : "r0", "r1" 312 ); 313 } 314 315 for (;;); 316 } 317 318 /* Static device mappings. */ 319 static const struct pmap_devmap tsarm_devmap[] = { 320 { 321 EP93XX_AHB_VBASE, 322 EP93XX_AHB_HWBASE, 323 EP93XX_AHB_SIZE, 324 VM_PROT_READ|VM_PROT_WRITE, 325 PTE_NOCACHE, 326 }, 327 328 { 329 EP93XX_APB_VBASE, 330 EP93XX_APB_HWBASE, 331 EP93XX_APB_SIZE, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE, 334 }, 335 336 /* 337 * IO8 and IO16 space *must* be mapped contiguously with 338 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 339 * on that! 340 */ 341 { 342 TS7XXX_IO8_VBASE, 343 TS7XXX_IO8_HWBASE, 344 TS7XXX_IO8_SIZE, 345 VM_PROT_READ|VM_PROT_WRITE, 346 PTE_NOCACHE, 347 }, 348 349 { 350 TS7XXX_IO16_VBASE, 351 TS7XXX_IO16_HWBASE, 352 TS7XXX_IO16_SIZE, 353 VM_PROT_READ|VM_PROT_WRITE, 354 PTE_NOCACHE, 355 }, 356 357 { 358 0, 359 0, 360 0, 361 0, 362 0, 363 } 364 }; 365 366 /* 367 * u_int initarm(...) 368 * 369 * Initial entry point on startup. This gets called before main() is 370 * entered. 371 * It should be responsible for setting up everything that must be 372 * in place when main is called. 373 * This includes 374 * Taking a copy of the boot configuration structure. 375 * Initialising the physical console so characters can be printed. 376 * Setting up page tables for the kernel 377 * Initialising interrupt controllers to a sane default state 378 */ 379 u_int 380 initarm(void *arg) 381 { 382 #ifdef FIXME 383 struct bootconfig *passed_bootconfig = arg; 384 extern char _end[]; 385 #endif 386 int loop; 387 int loop1; 388 u_int l1pagetable; 389 paddr_t memstart; 390 psize_t memsize; 391 392 #ifdef FIXME 393 /* Calibrate the delay loop. */ 394 i80321_calibrate_delay(); 395 #endif 396 397 /* 398 * Since we map the on-board devices VA==PA, and the kernel 399 * is running VA==PA, it's possible for us to initialize 400 * the console now. 401 */ 402 consinit(); 403 404 #ifdef VERBOSE_INIT_ARM 405 /* Talk to the user */ 406 printf("\nNetBSD/tsarm booting ...\n"); 407 #endif 408 409 /* 410 * Heads up ... Setup the CPU / MMU / TLB functions 411 */ 412 if (set_cpufuncs()) 413 panic("cpu not recognized!"); 414 415 /* 416 * We are currently running with the MMU enabled 417 */ 418 419 #ifdef FIXME 420 /* 421 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 422 * registers. 423 */ 424 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 425 &memstart, &memsize); 426 #else 427 memstart = 0x0; 428 memsize = 0x2000000; 429 #endif 430 431 #ifdef VERBOSE_INIT_ARM 432 printf("initarm: Configuring system ...\n"); 433 #endif 434 435 /* Fake bootconfig structure for the benefit of pmap.c */ 436 /* XXX must make the memory description h/w independent */ 437 bootconfig.dramblocks = 4; 438 bootconfig.dram[0].address = 0x0UL; 439 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 440 bootconfig.dram[1].address = 0x1000000UL; 441 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 442 bootconfig.dram[2].address = 0x4000000UL; 443 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 444 bootconfig.dram[3].address = 0x5000000UL; 445 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 446 447 /* 448 * Set up the variables that define the availablilty of 449 * physical memory. For now, we're going to set 450 * physical_freestart to 0x00200000 (where the kernel 451 * was loaded), and allocate the memory we need downwards. 452 * If we get too close to the L1 table that we set up, we 453 * will panic. We will update physical_freestart and 454 * physical_freeend later to reflect what pmap_bootstrap() 455 * wants to see. 456 * 457 * XXX pmap_bootstrap() needs an enema. 458 */ 459 physical_start = bootconfig.dram[0].address; 460 physical_end = bootconfig.dram[0].address + 461 (bootconfig.dram[0].pages * PAGE_SIZE); 462 463 physical_freestart = 0x00009000UL; 464 physical_freeend = 0x00200000UL; 465 466 physmem = (physical_end - physical_start) / PAGE_SIZE; 467 468 #ifdef VERBOSE_INIT_ARM 469 /* Tell the user about the memory */ 470 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 471 physical_start, physical_end - 1); 472 #endif 473 474 /* 475 * Okay, the kernel starts 2MB in from the bottom of physical 476 * memory. We are going to allocate our bootstrap pages downwards 477 * from there. 478 * 479 * We need to allocate some fixed page tables to get the kernel 480 * going. We allocate one page directory and a number of page 481 * tables and store the physical addresses in the kernel_pt_table 482 * array. 483 * 484 * The kernel page directory must be on a 16K boundary. The page 485 * tables must be on 4K bounaries. What we do is allocate the 486 * page directory on the first 16K boundary that we encounter, and 487 * the page tables on 4K boundaries otherwise. Since we allocate 488 * at least 3 L2 page tables, we are guaranteed to encounter at 489 * least one 16K aligned region. 490 */ 491 492 #ifdef VERBOSE_INIT_ARM 493 printf("Allocating page tables\n"); 494 #endif 495 496 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 497 498 #ifdef VERBOSE_INIT_ARM 499 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 500 physical_freestart, free_pages, free_pages); 501 #endif 502 503 /* Define a macro to simplify memory allocation */ 504 #define valloc_pages(var, np) \ 505 alloc_pages((var).pv_pa, (np)); \ 506 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 507 508 #define alloc_pages(var, np) \ 509 physical_freeend -= ((np) * PAGE_SIZE); \ 510 if (physical_freeend < physical_freestart) \ 511 panic("initarm: out of memory"); \ 512 (var) = physical_freeend; \ 513 free_pages -= (np); \ 514 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 515 516 loop1 = 0; 517 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 518 /* Are we 16KB aligned for an L1 ? */ 519 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 520 && kernel_l1pt.pv_pa == 0) { 521 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 522 } else { 523 valloc_pages(kernel_pt_table[loop1], 524 L2_TABLE_SIZE / PAGE_SIZE); 525 ++loop1; 526 } 527 } 528 529 /* This should never be able to happen but better confirm that. */ 530 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 531 panic("initarm: Failed to align the kernel page directory"); 532 533 /* 534 * Allocate a page for the system vectors page 535 */ 536 alloc_pages(systempage.pv_pa, 1); 537 538 /* Allocate stacks for all modes */ 539 valloc_pages(irqstack, IRQ_STACK_SIZE); 540 valloc_pages(abtstack, ABT_STACK_SIZE); 541 valloc_pages(undstack, UND_STACK_SIZE); 542 valloc_pages(kernelstack, UPAGES); 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 546 irqstack.pv_va); 547 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 548 abtstack.pv_va); 549 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 550 undstack.pv_va); 551 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 552 kernelstack.pv_va); 553 #endif 554 555 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 556 557 /* 558 * Ok we have allocated physical pages for the primary kernel 559 * page tables. Save physical_freeend for when we give whats left 560 * of memory below 2Mbyte to UVM. 561 */ 562 563 physical_freeend_low = physical_freeend; 564 565 #ifdef VERBOSE_INIT_ARM 566 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 567 #endif 568 569 /* 570 * Now we start construction of the L1 page table 571 * We start by mapping the L2 page tables into the L1. 572 * This means that we can replace L1 mappings later on if necessary 573 */ 574 l1pagetable = kernel_l1pt.pv_pa; 575 576 /* Map the L2 pages tables in the L1 page table */ 577 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 578 &kernel_pt_table[KERNEL_PT_SYS]); 579 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 580 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 581 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 582 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 583 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 584 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 585 586 /* update the top of the kernel VM */ 587 pmap_curmaxkvaddr = 588 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 589 590 #ifdef VERBOSE_INIT_ARM 591 printf("Mapping kernel\n"); 592 #endif 593 594 /* Now we fill in the L2 pagetable for the kernel static code/data */ 595 { 596 extern char etext[], _end[]; 597 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 598 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 599 u_int logical; 600 601 textsize = (textsize + PGOFSET) & ~PGOFSET; 602 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 603 604 logical = 0x00200000; /* offset of kernel in RAM */ 605 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 606 physical_start + logical, textsize, 607 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 608 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 609 physical_start + logical, totalsize - textsize, 610 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 611 } 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("Constructing L2 page tables\n"); 615 #endif 616 617 /* Map the stack pages */ 618 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 619 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 621 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 623 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 624 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 625 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 626 627 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 628 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 629 630 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 631 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 632 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 633 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 634 } 635 636 /* Map the vector page. */ 637 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 638 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 640 /* Map the statically mapped devices. */ 641 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 642 643 /* 644 * Update the physical_freestart/physical_freeend/free_pages 645 * variables. 646 */ 647 { 648 extern char _end[]; 649 650 physical_freestart = physical_start + 651 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 652 KERNEL_BASE); 653 physical_freeend = physical_end; 654 free_pages = 655 (physical_freeend - physical_freestart) / PAGE_SIZE; 656 } 657 658 /* 659 * Now we have the real page tables in place so we can switch to them. 660 * Once this is done we will be running with the REAL kernel page 661 * tables. 662 */ 663 664 /* Switch tables */ 665 #ifdef VERBOSE_INIT_ARM 666 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 667 physical_freestart, free_pages, free_pages); 668 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 669 #endif 670 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 671 cpu_setttb(kernel_l1pt.pv_pa); 672 cpu_tlb_flushID(); 673 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 674 675 /* 676 * Moved from cpu_startup() as data_abort_handler() references 677 * this during uvm init 678 */ 679 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 680 681 #ifdef VERBOSE_INIT_ARM 682 printf("done!\n"); 683 #endif 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("bootstrap done.\n"); 687 #endif 688 689 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 690 691 /* 692 * Pages were allocated during the secondary bootstrap for the 693 * stacks for different CPU modes. 694 * We must now set the r13 registers in the different CPU modes to 695 * point to these stacks. 696 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 697 * of the stack memory. 698 */ 699 #ifdef VERBOSE_INIT_ARM 700 printf("init subsystems: stacks "); 701 #endif 702 703 set_stackptr(PSR_IRQ32_MODE, 704 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 705 set_stackptr(PSR_ABT32_MODE, 706 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 707 set_stackptr(PSR_UND32_MODE, 708 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 709 710 /* 711 * Well we should set a data abort handler. 712 * Once things get going this will change as we will need a proper 713 * handler. 714 * Until then we will use a handler that just panics but tells us 715 * why. 716 * Initialisation of the vectors will just panic on a data abort. 717 * This just fills in a slightly better one. 718 */ 719 #ifdef VERBOSE_INIT_ARM 720 printf("vectors "); 721 #endif 722 data_abort_handler_address = (u_int)data_abort_handler; 723 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 724 undefined_handler_address = (u_int)undefinedinstruction_bounce; 725 726 /* Initialise the undefined instruction handlers */ 727 #ifdef VERBOSE_INIT_ARM 728 printf("undefined "); 729 #endif 730 undefined_init(); 731 732 /* Load memory into UVM. */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("page "); 735 #endif 736 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 737 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 738 atop(physical_freestart), atop(physical_freeend), 739 VM_FREELIST_DEFAULT); 740 uvm_page_physload(0, atop(physical_freeend_low), 741 0, atop(physical_freeend_low), 742 VM_FREELIST_DEFAULT); 743 /* 744 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 745 * we've only been working with the first one mapped at 0x0. Tell 746 * UVM about the others. 747 */ 748 uvm_page_physload(atop(0x1000000), atop(0x1800000), 749 atop(0x1000000), atop(0x1800000), 750 VM_FREELIST_DEFAULT); 751 uvm_page_physload(atop(0x4000000), atop(0x4800000), 752 atop(0x4000000), atop(0x4800000), 753 VM_FREELIST_DEFAULT); 754 uvm_page_physload(atop(0x5000000), atop(0x5800000), 755 atop(0x5000000), atop(0x5800000), 756 VM_FREELIST_DEFAULT); 757 758 physmem = 0x2000000 / PAGE_SIZE; 759 760 761 /* Boot strap pmap telling it where the kernel page table is */ 762 #ifdef VERBOSE_INIT_ARM 763 printf("pmap "); 764 #endif 765 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 766 767 /* Setup the IRQ system */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("irq "); 770 #endif 771 ep93xx_intr_init(); 772 #if NISA > 0 773 isa_intr_init(); 774 775 #ifdef VERBOSE_INIT_ARM 776 printf("isa "); 777 #endif 778 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 779 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 780 #endif 781 782 #ifdef VERBOSE_INIT_ARM 783 printf("done.\n"); 784 #endif 785 786 #ifdef BOOTHOWTO 787 boothowto = BOOTHOWTO; 788 #endif 789 790 #ifdef DDB 791 db_machine_init(); 792 if (boothowto & RB_KDB) 793 Debugger(); 794 #endif 795 796 /* We return the new stack pointer address */ 797 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 798 } 799 800 void 801 consinit(void) 802 { 803 static int consinit_called; 804 bus_space_handle_t ioh; 805 806 if (consinit_called != 0) 807 return; 808 809 consinit_called = 1; 810 811 /* 812 * Console devices are already mapped in VA. Our devmap reflects 813 * this, so register it now so drivers can map the console 814 * device. 815 */ 816 pmap_devmap_register(tsarm_devmap); 817 #if 0 818 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 819 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 820 821 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 822 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 823 { 824 panic("can't init serial console"); 825 } 826 #endif 827 828 #if NEPCOM > 0 829 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 830 EP93XX_APB_UART_SIZE, 0, &ioh); 831 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 832 ioh, comcnspeed, comcnmode)) 833 { 834 panic("can't init serial console"); 835 } 836 #else 837 panic("serial console not configured"); 838 #endif 839 #if KGDB 840 #if NEPCOM > 0 841 if (strcmp(kgdb_devname, "epcom") == 0) { 842 com_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 843 kgdb_devmode); 844 } 845 #endif /* NEPCOM > 0 */ 846 #endif /* KGDB */ 847 } 848 849 850 bus_dma_tag_t 851 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 852 { 853 int i; 854 struct arm32_bus_dma_tag *dmat; 855 856 for (i = 0; i < bootconfig.dramblocks; i++) { 857 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 858 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 859 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 860 PAGE_SIZE; 861 } 862 863 dmat = dma_tag_template; 864 865 dmat->_ranges = tsarm_dma_ranges; 866 dmat->_nranges = bootconfig.dramblocks; 867 868 return dmat; 869 } 870
Indexes created Wed Oct 15 14:09:57 GMT 2025