tsarm_machdep.c revision 1.33
1 /* $NetBSD: tsarm_machdep.c,v 1.33 2021/11/21 08:44:28 skrll 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 1.33 2021/11/21 08:44:28 skrll Exp $"); 77 78 #include "opt_arm_debug.h" 79 #include "opt_console.h" 80 #include "opt_ddb.h" 81 #include "opt_kgdb.h" 82 83 #include <sys/param.h> 84 #include <sys/device.h> 85 #include <sys/systm.h> 86 #include <sys/kernel.h> 87 #include <sys/exec.h> 88 #include <sys/proc.h> 89 #include <sys/msgbuf.h> 90 #include <sys/reboot.h> 91 #include <sys/termios.h> 92 #include <sys/ksyms.h> 93 #include <sys/bus.h> 94 #include <sys/cpu.h> 95 96 #include <uvm/uvm_extern.h> 97 98 #include <dev/cons.h> 99 100 #include <machine/db_machdep.h> 101 #include <ddb/db_sym.h> 102 #include <ddb/db_extern.h> 103 104 #include <acorn32/include/bootconfig.h> 105 #include <arm/locore.h> 106 #include <arm/undefined.h> 107 108 /* Define various stack sizes in pages */ 109 #define IRQ_STACK_SIZE 8 110 #define ABT_STACK_SIZE 8 111 #define UND_STACK_SIZE 8 112 113 #include <arm/arm32/machdep.h> 114 115 #include <arm/ep93xx/ep93xxreg.h> 116 #include <arm/ep93xx/ep93xxvar.h> 117 118 #include <dev/ic/comreg.h> 119 #include <dev/ic/comvar.h> 120 121 #include "epcom.h" 122 #if NEPCOM > 0 123 #include <arm/ep93xx/epcomvar.h> 124 #endif 125 126 #include "isa.h" 127 #if NISA > 0 128 #include <dev/isa/isareg.h> 129 #include <dev/isa/isavar.h> 130 #endif 131 132 #include <machine/isa_machdep.h> 133 134 #include <evbarm/tsarm/tsarmreg.h> 135 136 #include "ksyms.h" 137 138 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 139 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 140 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 141 142 /* 143 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 144 * Core-logic registers and I/O mappings occupy 0xf0000000 - 0xffffffff 145 */ 146 #define KERNEL_VM_SIZE 0x0C000000 147 148 struct bootconfig bootconfig; /* Boot config storage */ 149 char *boot_args = NULL; 150 char *boot_file = NULL; 151 152 vaddr_t physical_start; 153 vaddr_t physical_freestart; 154 vaddr_t physical_freeend; 155 vaddr_t physical_freeend_low; 156 vaddr_t physical_end; 157 u_int free_pages; 158 159 paddr_t msgbufphys; 160 161 static struct arm32_dma_range tsarm_dma_ranges[4]; 162 163 #if NISA > 0 164 extern void isa_tsarm_init(u_int, u_int); 165 #endif 166 167 #define KERNEL_PT_SYS 0 /* L2 table for mapping vectors page */ 168 169 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 170 #define KERNEL_PT_KERNEL_NUM 4 171 /* L2 tables for mapping kernel VM */ 172 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 173 174 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 175 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 176 177 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 178 179 /* Prototypes */ 180 181 void consinit(void); 182 /* 183 * Define the default console speed for the machine. 184 */ 185 #ifndef CONSPEED 186 #define CONSPEED B115200 187 #endif /* ! CONSPEED */ 188 189 #ifndef CONMODE 190 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 191 #endif 192 193 int comcnspeed = CONSPEED; 194 int comcnmode = CONMODE; 195 196 #if KGDB 197 #ifndef KGDB_DEVNAME 198 #error Must define KGDB_DEVNAME 199 #endif 200 const char kgdb_devname[] = KGDB_DEVNAME; 201 202 #ifndef KGDB_DEVADDR 203 #error Must define KGDB_DEVADDR 204 #endif 205 unsigned long kgdb_devaddr = KGDB_DEVADDR; 206 207 #ifndef KGDB_DEVRATE 208 #define KGDB_DEVRATE CONSPEED 209 #endif 210 int kgdb_devrate = KGDB_DEVRATE; 211 212 #ifndef KGDB_DEVMODE 213 #define KGDB_DEVMODE CONMODE 214 #endif 215 int kgdb_devmode = KGDB_DEVMODE; 216 #endif /* KGDB */ 217 218 /* 219 * void cpu_reboot(int howto, char *bootstr) 220 * 221 * Reboots the system 222 * 223 * Deal with any syncing, unmounting, dumping and shutdown hooks, 224 * then reset the CPU. 225 */ 226 void 227 cpu_reboot(int howto, char *bootstr) 228 { 229 230 /* 231 * If we are still cold then hit the air brakes 232 * and crash to earth fast 233 */ 234 if (cold) { 235 doshutdownhooks(); 236 pmf_system_shutdown(boothowto); 237 printf("\r\n"); 238 printf("The operating system has halted.\r\n"); 239 printf("Please press any key to reboot.\r\n"); 240 cngetc(); 241 printf("\r\nrebooting...\r\n"); 242 goto reset; 243 } 244 245 /* Disable console buffering */ 246 247 /* 248 * If RB_NOSYNC was not specified sync the discs. 249 * Note: Unless cold is set to 1 here, syslogd will die during the 250 * unmount. It looks like syslogd is getting woken up only to find 251 * that it cannot page part of the binary in as the filesystem has 252 * been unmounted. 253 */ 254 if (!(howto & RB_NOSYNC)) 255 bootsync(); 256 257 /* Say NO to interrupts */ 258 splhigh(); 259 260 /* Do a dump if requested. */ 261 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 262 dumpsys(); 263 264 /* Run any shutdown hooks */ 265 doshutdownhooks(); 266 267 pmf_system_shutdown(boothowto); 268 269 /* Make sure IRQ's are disabled */ 270 IRQdisable; 271 272 if (howto & RB_HALT) { 273 printf("\r\n"); 274 printf("The operating system has halted.\r\n"); 275 printf("Please press any key to reboot.\r\n"); 276 cngetc(); 277 } 278 279 printf("\r\nrebooting...\r\n"); 280 reset: 281 /* 282 * Make really really sure that all interrupts are disabled, 283 * and poke the Internal Bus and Peripheral Bus reset lines. 284 */ 285 (void) disable_interrupts(I32_bit|F32_bit); 286 287 { 288 uint32_t feed, ctrl; 289 290 feed = TS7XXX_IO16_VBASE + TS7XXX_WDOGFEED; 291 ctrl = TS7XXX_IO16_VBASE + TS7XXX_WDOGCTRL; 292 293 __asm volatile ( 294 "mov r0, #0x5\n" 295 "mov r1, #0x1\n" 296 "strh r0, [%0]\n" 297 "strh r1, [%1]\n" 298 : 299 : "r" (feed), "r" (ctrl) 300 : "r0", "r1" 301 ); 302 } 303 304 for (;;); 305 } 306 307 /* Static device mappings. */ 308 static const struct pmap_devmap tsarm_devmap[] = { 309 { 310 EP93XX_AHB_VBASE, 311 EP93XX_AHB_HWBASE, 312 EP93XX_AHB_SIZE, 313 VM_PROT_READ|VM_PROT_WRITE, 314 PTE_NOCACHE, 315 }, 316 317 { 318 EP93XX_APB_VBASE, 319 EP93XX_APB_HWBASE, 320 EP93XX_APB_SIZE, 321 VM_PROT_READ|VM_PROT_WRITE, 322 PTE_NOCACHE, 323 }, 324 325 /* 326 * IO8 and IO16 space *must* be mapped contiguously with 327 * IO8_VA == IO16_VA - 64 Mbytes. ISA busmap driver depends 328 * on that! 329 */ 330 { 331 TS7XXX_IO8_VBASE, 332 TS7XXX_IO8_HWBASE, 333 TS7XXX_IO8_SIZE, 334 VM_PROT_READ|VM_PROT_WRITE, 335 PTE_NOCACHE, 336 }, 337 338 { 339 TS7XXX_IO16_VBASE, 340 TS7XXX_IO16_HWBASE, 341 TS7XXX_IO16_SIZE, 342 VM_PROT_READ|VM_PROT_WRITE, 343 PTE_NOCACHE, 344 }, 345 346 { 347 0, 348 0, 349 0, 350 0, 351 0, 352 } 353 }; 354 355 /* 356 * vaddr_t initarm(...) 357 * 358 * Initial entry point on startup. This gets called before main() is 359 * entered. 360 * It should be responsible for setting up everything that must be 361 * in place when main is called. 362 * This includes 363 * Taking a copy of the boot configuration structure. 364 * Initialising the physical console so characters can be printed. 365 * Setting up page tables for the kernel 366 * Initialising interrupt controllers to a sane default state 367 */ 368 vaddr_t 369 initarm(void *arg) 370 { 371 #ifdef FIXME 372 struct bootconfig *passed_bootconfig = arg; 373 extern char _end[]; 374 #endif 375 int loop; 376 int loop1; 377 u_int l1pagetable; 378 379 #ifdef FIXME 380 paddr_t memstart; 381 psize_t memsize; 382 383 /* Calibrate the delay loop. */ 384 i80321_calibrate_delay(); 385 #endif 386 387 /* 388 * Since we map the on-board devices VA==PA, and the kernel 389 * is running VA==PA, it's possible for us to initialize 390 * the console now. 391 */ 392 consinit(); 393 394 #ifdef VERBOSE_INIT_ARM 395 /* Talk to the user */ 396 printf("\nNetBSD/tsarm booting ...\n"); 397 #endif 398 399 /* 400 * Heads up ... Setup the CPU / MMU / TLB functions 401 */ 402 if (set_cpufuncs()) 403 panic("cpu not recognized!"); 404 405 /* 406 * We are currently running with the MMU enabled 407 */ 408 409 #ifdef FIXME 410 /* 411 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 412 * registers. 413 */ 414 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 415 &memstart, &memsize); 416 417 memstart = 0x0; 418 memsize = 0x2000000; 419 #endif 420 421 #ifdef VERBOSE_INIT_ARM 422 printf("initarm: Configuring system ...\n"); 423 #endif 424 425 /* Fake bootconfig structure for the benefit of pmap.c */ 426 /* XXX must make the memory description h/w independent */ 427 bootconfig.dramblocks = 4; 428 bootconfig.dram[0].address = 0x0UL; 429 bootconfig.dram[0].pages = 0x800000UL / PAGE_SIZE; 430 bootconfig.dram[1].address = 0x1000000UL; 431 bootconfig.dram[1].pages = 0x800000UL / PAGE_SIZE; 432 bootconfig.dram[2].address = 0x4000000UL; 433 bootconfig.dram[2].pages = 0x800000UL / PAGE_SIZE; 434 bootconfig.dram[3].address = 0x5000000UL; 435 bootconfig.dram[3].pages = 0x800000UL / PAGE_SIZE; 436 437 /* 438 * Set up the variables that define the availability of 439 * physical memory. For now, we're going to set 440 * physical_freestart to 0x00200000 (where the kernel 441 * was loaded), and allocate the memory we need downwards. 442 * If we get too close to the L1 table that we set up, we 443 * will panic. We will update physical_freestart and 444 * physical_freeend later to reflect what pmap_bootstrap() 445 * wants to see. 446 * 447 * XXX pmap_bootstrap() needs an enema. 448 */ 449 physical_start = bootconfig.dram[0].address; 450 physical_end = bootconfig.dram[0].address + 451 (bootconfig.dram[0].pages * PAGE_SIZE); 452 453 physical_freestart = 0x00009000UL; 454 physical_freeend = 0x00200000UL; 455 456 physmem = (physical_end - physical_start) / PAGE_SIZE; 457 458 #ifdef VERBOSE_INIT_ARM 459 /* Tell the user about the memory */ 460 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 461 physical_start, physical_end - 1); 462 #endif 463 464 /* 465 * Okay, the kernel starts 2MB in from the bottom of physical 466 * memory. We are going to allocate our bootstrap pages downwards 467 * from there. 468 * 469 * We need to allocate some fixed page tables to get the kernel 470 * going. We allocate one page directory and a number of page 471 * tables and store the physical addresses in the kernel_pt_table 472 * array. 473 * 474 * The kernel page directory must be on a 16K boundary. The page 475 * tables must be on 4K bounaries. What we do is allocate the 476 * page directory on the first 16K boundary that we encounter, and 477 * the page tables on 4K boundaries otherwise. Since we allocate 478 * at least 3 L2 page tables, we are guaranteed to encounter at 479 * least one 16K aligned region. 480 */ 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("Allocating page tables\n"); 484 #endif 485 486 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 487 488 #ifdef VERBOSE_INIT_ARM 489 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 490 physical_freestart, free_pages, free_pages); 491 #endif 492 493 /* Define a macro to simplify memory allocation */ 494 #define valloc_pages(var, np) \ 495 alloc_pages((var).pv_pa, (np)); \ 496 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 497 498 #define alloc_pages(var, np) \ 499 physical_freeend -= ((np) * PAGE_SIZE); \ 500 if (physical_freeend < physical_freestart) \ 501 panic("initarm: out of memory"); \ 502 (var) = physical_freeend; \ 503 free_pages -= (np); \ 504 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 505 506 loop1 = 0; 507 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 508 /* Are we 16KB aligned for an L1 ? */ 509 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 510 && kernel_l1pt.pv_pa == 0) { 511 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 512 } else { 513 valloc_pages(kernel_pt_table[loop1], 514 L2_TABLE_SIZE / PAGE_SIZE); 515 ++loop1; 516 } 517 } 518 519 /* This should never be able to happen but better confirm that. */ 520 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 521 panic("initarm: Failed to align the kernel page directory"); 522 523 /* 524 * Allocate a page for the system vectors page 525 */ 526 alloc_pages(systempage.pv_pa, 1); 527 528 /* Allocate stacks for all modes */ 529 valloc_pages(irqstack, IRQ_STACK_SIZE); 530 valloc_pages(abtstack, ABT_STACK_SIZE); 531 valloc_pages(undstack, UND_STACK_SIZE); 532 valloc_pages(kernelstack, UPAGES); 533 534 #ifdef VERBOSE_INIT_ARM 535 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 536 irqstack.pv_va); 537 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 538 abtstack.pv_va); 539 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 540 undstack.pv_va); 541 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 542 kernelstack.pv_va); 543 #endif 544 545 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 546 547 /* 548 * Ok we have allocated physical pages for the primary kernel 549 * page tables. Save physical_freeend for when we give whats left 550 * of memory below 2Mbyte to UVM. 551 */ 552 553 physical_freeend_low = physical_freeend; 554 555 #ifdef VERBOSE_INIT_ARM 556 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 557 #endif 558 559 /* 560 * Now we start construction of the L1 page table 561 * We start by mapping the L2 page tables into the L1. 562 * This means that we can replace L1 mappings later on if necessary 563 */ 564 l1pagetable = kernel_l1pt.pv_pa; 565 566 /* Map the L2 pages tables in the L1 page table */ 567 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 568 &kernel_pt_table[KERNEL_PT_SYS]); 569 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 570 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 571 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 572 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 573 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 574 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 575 576 /* update the top of the kernel VM */ 577 pmap_curmaxkvaddr = 578 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 579 580 #ifdef VERBOSE_INIT_ARM 581 printf("Mapping kernel\n"); 582 #endif 583 584 /* Now we fill in the L2 pagetable for the kernel static code/data */ 585 { 586 extern char etext[], _end[]; 587 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 588 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 589 u_int logical; 590 591 textsize = (textsize + PGOFSET) & ~PGOFSET; 592 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 593 594 logical = 0x00200000; /* offset of kernel in RAM */ 595 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 596 physical_start + logical, textsize, 597 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 599 physical_start + logical, totalsize - textsize, 600 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 } 602 603 #ifdef VERBOSE_INIT_ARM 604 printf("Constructing L2 page tables\n"); 605 #endif 606 607 /* Map the stack pages */ 608 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 609 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 610 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 611 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 613 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 615 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 616 617 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 618 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 619 620 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 621 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 622 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 623 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 624 } 625 626 /* Map the vector page. */ 627 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 630 /* Map the statically mapped devices. */ 631 pmap_devmap_bootstrap(l1pagetable, tsarm_devmap); 632 633 /* 634 * Update the physical_freestart/physical_freeend/free_pages 635 * variables. 636 */ 637 { 638 extern char _end[]; 639 640 physical_freestart = physical_start + 641 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 642 KERNEL_BASE); 643 physical_freeend = physical_end; 644 free_pages = 645 (physical_freeend - physical_freestart) / PAGE_SIZE; 646 } 647 648 /* 649 * Now we have the real page tables in place so we can switch to them. 650 * Once this is done we will be running with the REAL kernel page 651 * tables. 652 */ 653 654 /* Switch tables */ 655 #ifdef VERBOSE_INIT_ARM 656 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 657 physical_freestart, free_pages, free_pages); 658 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 659 #endif 660 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 661 cpu_setttb(kernel_l1pt.pv_pa, true); 662 cpu_tlb_flushID(); 663 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 664 665 /* 666 * Moved from cpu_startup() as data_abort_handler() references 667 * this during uvm init 668 */ 669 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("done!\n"); 673 #endif 674 675 #ifdef VERBOSE_INIT_ARM 676 printf("bootstrap done.\n"); 677 #endif 678 679 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 680 681 /* 682 * Pages were allocated during the secondary bootstrap for the 683 * stacks for different CPU modes. 684 * We must now set the r13 registers in the different CPU modes to 685 * point to these stacks. 686 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 687 * of the stack memory. 688 */ 689 #ifdef VERBOSE_INIT_ARM 690 printf("init subsystems: stacks "); 691 #endif 692 693 set_stackptr(PSR_IRQ32_MODE, 694 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 695 set_stackptr(PSR_ABT32_MODE, 696 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 697 set_stackptr(PSR_UND32_MODE, 698 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 699 700 /* 701 * Well we should set a data abort handler. 702 * Once things get going this will change as we will need a proper 703 * handler. 704 * Until then we will use a handler that just panics but tells us 705 * why. 706 * Initialisation of the vectors will just panic on a data abort. 707 * This just fills in a slightly better one. 708 */ 709 #ifdef VERBOSE_INIT_ARM 710 printf("vectors "); 711 #endif 712 data_abort_handler_address = (u_int)data_abort_handler; 713 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 714 undefined_handler_address = (u_int)undefinedinstruction_bounce; 715 716 /* Initialise the undefined instruction handlers */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("undefined "); 719 #endif 720 undefined_init(); 721 722 /* Load memory into UVM. */ 723 #ifdef VERBOSE_INIT_ARM 724 printf("page "); 725 #endif 726 uvm_md_init(); 727 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 728 atop(physical_freestart), atop(physical_freeend), 729 VM_FREELIST_DEFAULT); 730 uvm_page_physload(0, atop(physical_freeend_low), 731 0, atop(physical_freeend_low), 732 VM_FREELIST_DEFAULT); 733 /* 734 * There is 32 Mb of memory on the TS-7200 in 4 8Mb chunks, so far 735 * we've only been working with the first one mapped at 0x0. Tell 736 * UVM about the others. 737 */ 738 uvm_page_physload(atop(0x1000000), atop(0x1800000), 739 atop(0x1000000), atop(0x1800000), 740 VM_FREELIST_DEFAULT); 741 uvm_page_physload(atop(0x4000000), atop(0x4800000), 742 atop(0x4000000), atop(0x4800000), 743 VM_FREELIST_DEFAULT); 744 uvm_page_physload(atop(0x5000000), atop(0x5800000), 745 atop(0x5000000), atop(0x5800000), 746 VM_FREELIST_DEFAULT); 747 748 physmem = 0x2000000 / PAGE_SIZE; 749 750 751 /* Boot strap pmap telling it where managed kernel virtual memory is */ 752 #ifdef VERBOSE_INIT_ARM 753 printf("pmap "); 754 #endif 755 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 756 757 /* Setup the IRQ system */ 758 #ifdef VERBOSE_INIT_ARM 759 printf("irq "); 760 #endif 761 ep93xx_intr_init(); 762 #if NISA > 0 763 isa_intr_init(); 764 765 #ifdef VERBOSE_INIT_ARM 766 printf("isa "); 767 #endif 768 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 769 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 770 #endif 771 772 #ifdef VERBOSE_INIT_ARM 773 printf("done.\n"); 774 #endif 775 776 #ifdef BOOTHOWTO 777 boothowto = BOOTHOWTO; 778 #endif 779 780 #ifdef DDB 781 db_machine_init(); 782 if (boothowto & RB_KDB) 783 Debugger(); 784 #endif 785 786 /* We return the new stack pointer address */ 787 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 788 } 789 790 void 791 consinit(void) 792 { 793 static int consinit_called; 794 bus_space_handle_t ioh; 795 796 if (consinit_called != 0) 797 return; 798 799 consinit_called = 1; 800 801 /* 802 * Console devices are already mapped in VA. Our devmap reflects 803 * this, so register it now so drivers can map the console 804 * device. 805 */ 806 pmap_devmap_register(tsarm_devmap); 807 #if 0 808 isa_tsarm_init(TS7XXX_IO16_VBASE + TS7XXX_ISAIO, 809 TS7XXX_IO16_VBASE + TS7XXX_ISAMEM); 810 811 if (comcnattach(&isa_io_bs_tag, 0x3e8, comcnspeed, 812 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 813 { 814 panic("can't init serial console"); 815 } 816 #endif 817 818 #if NEPCOM > 0 819 bus_space_map(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 820 EP93XX_APB_UART_SIZE, 0, &ioh); 821 if (epcomcnattach(&ep93xx_bs_tag, EP93XX_APB_HWBASE + EP93XX_APB_UART1, 822 ioh, comcnspeed, comcnmode)) 823 { 824 panic("can't init serial console"); 825 } 826 #else 827 panic("serial console not configured"); 828 #endif 829 #if KGDB 830 #if NEPCOM > 0 831 if (strcmp(kgdb_devname, "epcom") == 0) { 832 epcom_kgdb_attach(&ep93xx_bs_tag, kgdb_devaddr, kgdb_devrate, 833 kgdb_devmode); 834 } 835 #endif /* NEPCOM > 0 */ 836 #endif /* KGDB */ 837 } 838 839 840 bus_dma_tag_t 841 ep93xx_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 842 { 843 int i; 844 struct arm32_bus_dma_tag *dmat; 845 846 for (i = 0; i < bootconfig.dramblocks; i++) { 847 tsarm_dma_ranges[i].dr_sysbase = bootconfig.dram[i].address; 848 tsarm_dma_ranges[i].dr_busbase = bootconfig.dram[i].address; 849 tsarm_dma_ranges[i].dr_len = bootconfig.dram[i].pages * 850 PAGE_SIZE; 851 } 852 853 dmat = dma_tag_template; 854 855 dmat->_ranges = tsarm_dma_ranges; 856 dmat->_nranges = bootconfig.dramblocks; 857 858 return dmat; 859 } 860
Indexes created Thu Oct 02 14:10:14 GMT 2025