integrator_machdep.c revision 1.36
1 /* $NetBSD: integrator_machdep.c,v 1.36 2003/05/03 18:25:31 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001,2002 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997,1998 Mark Brinicombe. 34 * Copyright (c) 1997,1998 Causality Limited. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Mark Brinicombe 48 * for the NetBSD Project. 49 * 4. The name of the company nor the name of the author may be used to 50 * endorse or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * Machine dependant functions for kernel setup for integrator board 66 * 67 * Created : 24/11/97 68 */ 69 70 #include "opt_ddb.h" 71 #include "opt_pmap_debug.h" 72 73 #include <sys/param.h> 74 #include <sys/device.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/exec.h> 78 #include <sys/proc.h> 79 #include <sys/msgbuf.h> 80 #include <sys/reboot.h> 81 #include <sys/termios.h> 82 #include <sys/ksyms.h> 83 84 #include <uvm/uvm_extern.h> 85 86 #include <dev/cons.h> 87 88 #include <machine/db_machdep.h> 89 #include <ddb/db_sym.h> 90 #include <ddb/db_extern.h> 91 92 #include <machine/bootconfig.h> 93 #include <machine/bus.h> 94 #include <machine/cpu.h> 95 #include <machine/frame.h> 96 #include <machine/intr.h> 97 #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */ 98 #include <arm/undefined.h> 99 100 #include <arm/arm32/machdep.h> 101 102 #include <evbarm/integrator/integrator_boot.h> 103 104 #include "opt_ipkdb.h" 105 #include "pci.h" 106 #include "ksyms.h" 107 108 void ifpga_reset(void) __attribute__((noreturn)); 109 110 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 111 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 112 113 /* 114 * Address to call from cpu_reset() to reset the machine. 115 * This is machine architecture dependant as it varies depending 116 * on where the ROM appears when you turn the MMU off. 117 */ 118 119 u_int cpu_reset_address = (u_int) ifpga_reset; 120 121 /* Define various stack sizes in pages */ 122 #define IRQ_STACK_SIZE 1 123 #define ABT_STACK_SIZE 1 124 #ifdef IPKDB 125 #define UND_STACK_SIZE 2 126 #else 127 #define UND_STACK_SIZE 1 128 #endif 129 130 BootConfig bootconfig; /* Boot config storage */ 131 char *boot_args = NULL; 132 char *boot_file = NULL; 133 134 vm_offset_t physical_start; 135 vm_offset_t physical_freestart; 136 vm_offset_t physical_freeend; 137 vm_offset_t physical_end; 138 u_int free_pages; 139 vm_offset_t pagetables_start; 140 int physmem = 0; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 /* Physical and virtual addresses for some global pages */ 148 pv_addr_t systempage; 149 pv_addr_t irqstack; 150 pv_addr_t undstack; 151 pv_addr_t abtstack; 152 pv_addr_t kernelstack; 153 154 vm_offset_t msgbufphys; 155 156 extern u_int data_abort_handler_address; 157 extern u_int prefetch_abort_handler_address; 158 extern u_int undefined_handler_address; 159 160 #ifdef PMAP_DEBUG 161 extern int pmap_debug_level; 162 #endif 163 164 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 165 166 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 167 #define KERNEL_PT_KERNEL_NUM 2 168 /* L2 tables for mapping kernel VM */ 169 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 170 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 171 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 172 173 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 174 175 struct user *proc0paddr; 176 177 /* Prototypes */ 178 179 static void integrator_sdram_bounds (paddr_t *, psize_t *); 180 181 void consinit(void); 182 183 /* A load of console goo. */ 184 #include "vga.h" 185 #if NVGA > 0 186 #include <dev/ic/mc6845reg.h> 187 #include <dev/ic/pcdisplayvar.h> 188 #include <dev/ic/vgareg.h> 189 #include <dev/ic/vgavar.h> 190 #endif 191 192 #include "pckbc.h" 193 #if NPCKBC > 0 194 #include <dev/ic/i8042reg.h> 195 #include <dev/ic/pckbcvar.h> 196 #endif 197 198 #include "com.h" 199 #if NCOM > 0 200 #include <dev/ic/comreg.h> 201 #include <dev/ic/comvar.h> 202 #ifndef CONCOMADDR 203 #define CONCOMADDR 0x3f8 204 #endif 205 #endif 206 207 /* 208 * Define the default console speed for the board. This is generally 209 * what the firmware provided with the board defaults to. 210 */ 211 #ifndef CONSPEED 212 #define CONSPEED B115200 213 #endif 214 #ifndef CONMODE 215 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 216 #endif 217 218 int comcnspeed = CONSPEED; 219 int comcnmode = CONMODE; 220 221 #include "plcom.h" 222 #if (NPLCOM > 0) 223 #include <evbarm/dev/plcomreg.h> 224 #include <evbarm/dev/plcomvar.h> 225 226 #include <evbarm/ifpga/ifpgamem.h> 227 #include <evbarm/ifpga/ifpgareg.h> 228 #include <evbarm/ifpga/ifpgavar.h> 229 #endif 230 231 #ifndef CONSDEVNAME 232 #define CONSDEVNAME "plcom" 233 #endif 234 235 #ifndef PLCONSPEED 236 #define PLCONSPEED B38400 237 #endif 238 #ifndef PLCONMODE 239 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 240 #endif 241 #ifndef PLCOMCNUNIT 242 #define PLCOMCNUNIT -1 243 #endif 244 245 int plcomcnspeed = PLCONSPEED; 246 int plcomcnmode = PLCONMODE; 247 248 #if 0 249 extern struct consdev kcomcons; 250 static void kcomcnputc(dev_t, int); 251 #endif 252 253 /* 254 * void cpu_reboot(int howto, char *bootstr) 255 * 256 * Reboots the system 257 * 258 * Deal with any syncing, unmounting, dumping and shutdown hooks, 259 * then reset the CPU. 260 */ 261 void 262 cpu_reboot(int howto, char *bootstr) 263 { 264 #ifdef DIAGNOSTIC 265 /* info */ 266 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 267 #endif 268 269 /* 270 * If we are still cold then hit the air brakes 271 * and crash to earth fast 272 */ 273 if (cold) { 274 doshutdownhooks(); 275 printf("The operating system has halted.\n"); 276 printf("Please press any key to reboot.\n\n"); 277 cngetc(); 278 printf("rebooting...\n"); 279 ifpga_reset(); 280 /*NOTREACHED*/ 281 } 282 283 /* Disable console buffering */ 284 285 /* 286 * If RB_NOSYNC was not specified sync the discs. 287 * Note: Unless cold is set to 1 here, syslogd will die during the 288 * unmount. It looks like syslogd is getting woken up only to find 289 * that it cannot page part of the binary in as the filesystem has 290 * been unmounted. 291 */ 292 if (!(howto & RB_NOSYNC)) 293 bootsync(); 294 295 /* Say NO to interrupts */ 296 splhigh(); 297 298 /* Do a dump if requested. */ 299 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 300 dumpsys(); 301 302 /* Run any shutdown hooks */ 303 doshutdownhooks(); 304 305 /* Make sure IRQ's are disabled */ 306 IRQdisable; 307 308 if (howto & RB_HALT) { 309 printf("The operating system has halted.\n"); 310 printf("Please press any key to reboot.\n\n"); 311 cngetc(); 312 } 313 314 printf("rebooting...\n"); 315 ifpga_reset(); 316 /*NOTREACHED*/ 317 } 318 319 /* 320 * Mapping table for core kernel memory. This memory is mapped at init 321 * time with section mappings. 322 */ 323 struct l1_sec_map { 324 vaddr_t va; 325 vaddr_t pa; 326 vsize_t size; 327 vm_prot_t prot; 328 int cache; 329 } l1_sec_table[] = { 330 #if NPLCOM > 0 && defined(PLCONSOLE) 331 { 332 UART0_BOOT_BASE, 333 IFPGA_IO_BASE + IFPGA_UART0, 334 1024 * 1024, 335 VM_PROT_READ|VM_PROT_WRITE, 336 PTE_NOCACHE 337 }, 338 339 { 340 UART1_BOOT_BASE, 341 IFPGA_IO_BASE + IFPGA_UART1, 342 1024 * 1024, 343 VM_PROT_READ|VM_PROT_WRITE, 344 PTE_NOCACHE 345 }, 346 #endif 347 #if NPCI > 0 348 { 349 IFPGA_PCI_IO_VBASE, 350 IFPGA_PCI_IO_BASE, 351 IFPGA_PCI_IO_VSIZE, 352 VM_PROT_READ|VM_PROT_WRITE, 353 PTE_NOCACHE 354 }, 355 356 { 357 IFPGA_PCI_CONF_VBASE, 358 IFPGA_PCI_CONF_BASE, 359 IFPGA_PCI_CONF_VSIZE, 360 VM_PROT_READ|VM_PROT_WRITE, 361 PTE_NOCACHE }, 362 #endif 363 364 { 365 0, 366 0, 367 0, 368 0, 369 0 370 } 371 }; 372 373 /* 374 * u_int initarm(...) 375 * 376 * Initial entry point on startup. This gets called before main() is 377 * entered. 378 * It should be responsible for setting up everything that must be 379 * in place when main is called. 380 * This includes 381 * Taking a copy of the boot configuration structure. 382 * Initialising the physical console so characters can be printed. 383 * Setting up page tables for the kernel 384 * Relocating the kernel to the bottom of physical memory 385 */ 386 387 u_int 388 initarm(void *arg) 389 { 390 int loop; 391 int loop1; 392 u_int l1pagetable; 393 extern int etext asm ("_etext"); 394 extern int end asm ("_end"); 395 pv_addr_t kernel_l1pt; 396 pv_addr_t kernel_ptpt; 397 paddr_t memstart; 398 psize_t memsize; 399 #if NPLCOM > 0 && defined(PLCONSOLE) 400 static struct bus_space plcom_bus_space; 401 #endif 402 403 /* 404 * Heads up ... Setup the CPU / MMU / TLB functions 405 */ 406 if (set_cpufuncs()) 407 panic("cpu not recognized!"); 408 409 #if NPLCOM > 0 && defined(PLCONSOLE) 410 /* 411 * Initialise the diagnostic serial console 412 * This allows a means of generating output during initarm(). 413 * Once all the memory map changes are complete we can call consinit() 414 * and not have to worry about things moving. 415 */ 416 417 if (PLCOMCNUNIT == 0) { 418 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 419 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 420 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 421 } else if (PLCOMCNUNIT == 1) { 422 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 423 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 424 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 425 } 426 #endif 427 428 /* Talk to the user */ 429 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 430 431 /* 432 * Ok we have the following memory map 433 * 434 * XXX NO WE DON'T 435 * 436 * virtual address == physical address apart from the areas: 437 * 0x00000000 -> 0x000fffff which is mapped to 438 * top 1MB of physical memory 439 * 0x00100000 -> 0x0fffffff which is mapped to 440 * physical addresses 0x00100000 -> 0x0fffffff 441 * 0x10000000 -> 0x1fffffff which is mapped to 442 * physical addresses 0x00000000 -> 0x0fffffff 443 * 0x20000000 -> 0xefffffff which is mapped to 444 * physical addresses 0x20000000 -> 0xefffffff 445 * 0xf0000000 -> 0xf03fffff which is mapped to 446 * physical addresses 0x00000000 -> 0x003fffff 447 * 448 * This means that the kernel is mapped suitably for continuing 449 * execution, all I/O is mapped 1:1 virtual to physical and 450 * physical memory is accessible. 451 * 452 * The initarm() has the responsibility for creating the kernel 453 * page tables. 454 * It must also set up various memory pointers that are used 455 * by pmap etc. 456 */ 457 458 /* 459 * Fetch the SDRAM start/size from the CM configuration registers. 460 */ 461 integrator_sdram_bounds(&memstart, &memsize); 462 463 printf("initarm: Configuring system ...\n"); 464 465 /* Fake bootconfig structure for the benefit of pmap.c */ 466 /* XXX must make the memory description h/w independent */ 467 bootconfig.dramblocks = 1; 468 bootconfig.dram[0].address = memstart; 469 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 470 471 /* 472 * Set up the variables that define the availablilty of 473 * physical memory. For now, we're going to set 474 * physical_freestart to 0x00200000 (where the kernel 475 * was loaded), and allocate the memory we need downwards. 476 * If we get too close to the L1 table that we set up, we 477 * will panic. We will update physical_freestart and 478 * physical_freeend later to reflect what pmap_bootstrap() 479 * wants to see. 480 * 481 * XXX pmap_bootstrap() needs an enema. 482 */ 483 physical_start = bootconfig.dram[0].address; 484 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 485 486 physical_freestart = 0x00009000UL; 487 physical_freeend = 0x00200000UL; 488 489 physmem = (physical_end - physical_start) / PAGE_SIZE; 490 491 /* Tell the user about the memory */ 492 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 493 physical_start, physical_end - 1); 494 495 /* 496 * Okay, the kernel starts 2MB in from the bottom of physical 497 * memory. We are going to allocate our bootstrap pages downwards 498 * from there. 499 * 500 * We need to allocate some fixed page tables to get the kernel 501 * going. We allocate one page directory and a number of page 502 * tables and store the physical addresses in the kernel_pt_table 503 * array. 504 * 505 * The kernel page directory must be on a 16K boundary. The page 506 * tables must be on 4K bounaries. What we do is allocate the 507 * page directory on the first 16K boundary that we encounter, and 508 * the page tables on 4K boundaries otherwise. Since we allocate 509 * at least 3 L2 page tables, we are guaranteed to encounter at 510 * least one 16K aligned region. 511 */ 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("Allocating page tables\n"); 515 #endif 516 517 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 521 physical_freestart, free_pages, free_pages); 522 #endif 523 524 /* Define a macro to simplify memory allocation */ 525 #define valloc_pages(var, np) \ 526 alloc_pages((var).pv_pa, (np)); \ 527 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 528 529 #define alloc_pages(var, np) \ 530 physical_freeend -= ((np) * PAGE_SIZE); \ 531 if (physical_freeend < physical_freestart) \ 532 panic("initarm: out of memory"); \ 533 (var) = physical_freeend; \ 534 free_pages -= (np); \ 535 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 536 537 loop1 = 0; 538 kernel_l1pt.pv_pa = 0; 539 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 540 /* Are we 16KB aligned for an L1 ? */ 541 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 542 && kernel_l1pt.pv_pa == 0) { 543 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 544 } else { 545 valloc_pages(kernel_pt_table[loop1], 546 L2_TABLE_SIZE / PAGE_SIZE); 547 ++loop1; 548 } 549 } 550 551 /* This should never be able to happen but better confirm that. */ 552 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 553 panic("initarm: Failed to align the kernel page directory"); 554 555 /* 556 * Allocate a page for the system page mapped to V0x00000000 557 * This page will just contain the system vectors and can be 558 * shared by all processes. 559 */ 560 alloc_pages(systempage.pv_pa, 1); 561 562 /* Allocate stacks for all modes */ 563 valloc_pages(irqstack, IRQ_STACK_SIZE); 564 valloc_pages(abtstack, ABT_STACK_SIZE); 565 valloc_pages(undstack, UND_STACK_SIZE); 566 valloc_pages(kernelstack, UPAGES); 567 568 #ifdef VERBOSE_INIT_ARM 569 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 570 irqstack.pv_va); 571 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 572 abtstack.pv_va); 573 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 574 undstack.pv_va); 575 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 576 kernelstack.pv_va); 577 #endif 578 579 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 580 581 /* 582 * Ok we have allocated physical pages for the primary kernel 583 * page tables 584 */ 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 588 #endif 589 590 /* 591 * Now we start construction of the L1 page table 592 * We start by mapping the L2 page tables into the L1. 593 * This means that we can replace L1 mappings later on if necessary 594 */ 595 l1pagetable = kernel_l1pt.pv_pa; 596 597 /* Map the L2 pages tables in the L1 page table */ 598 pmap_link_l2pt(l1pagetable, 0x00000000, 599 &kernel_pt_table[KERNEL_PT_SYS]); 600 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 601 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 602 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 603 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 604 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 605 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 606 607 /* update the top of the kernel VM */ 608 pmap_curmaxkvaddr = 609 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 610 611 #ifdef VERBOSE_INIT_ARM 612 printf("Mapping kernel\n"); 613 #endif 614 615 /* Now we fill in the L2 pagetable for the kernel static code/data */ 616 { 617 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 618 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 619 u_int logical; 620 621 textsize = (textsize + PGOFSET) & ~PGOFSET; 622 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 623 624 logical = 0x00200000; /* offset of kernel in RAM */ 625 626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 627 physical_start + logical, textsize, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 630 physical_start + logical, totalsize - textsize, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 } 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("Constructing L2 page tables\n"); 636 #endif 637 638 /* Map the stack pages */ 639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 642 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 644 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 646 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 649 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 650 651 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 652 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 653 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 655 } 656 657 /* Map the vector page. */ 658 #if 1 659 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 660 the cache-clean code there. */ 661 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 662 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 663 #else 664 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 665 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 666 #endif 667 /* Map the core memory needed before autoconfig */ 668 loop = 0; 669 while (l1_sec_table[loop].size) { 670 vm_size_t sz; 671 672 #ifdef VERBOSE_INIT_ARM 673 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 674 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 675 l1_sec_table[loop].va); 676 #endif 677 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 678 pmap_map_section(l1pagetable, 679 l1_sec_table[loop].va + sz, 680 l1_sec_table[loop].pa + sz, 681 l1_sec_table[loop].prot, 682 l1_sec_table[loop].cache); 683 ++loop; 684 } 685 686 /* 687 * Now we have the real page tables in place so we can switch to them. 688 * Once this is done we will be running with the REAL kernel page 689 * tables. 690 */ 691 692 /* 693 * Update the physical_freestart/physical_freeend/free_pages 694 * variables. 695 */ 696 { 697 physical_freestart = physical_start + 698 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 699 KERNEL_BASE); 700 physical_freeend = physical_end; 701 free_pages = 702 (physical_freeend - physical_freestart) / PAGE_SIZE; 703 } 704 705 /* Switch tables */ 706 #ifdef VERBOSE_INIT_ARM 707 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 708 physical_freestart, free_pages, free_pages); 709 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 710 #endif 711 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 712 setttb(kernel_l1pt.pv_pa); 713 cpu_tlb_flushID(); 714 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 715 716 /* 717 * Moved from cpu_startup() as data_abort_handler() references 718 * this during uvm init 719 */ 720 proc0paddr = (struct user *)kernelstack.pv_va; 721 lwp0.l_addr = proc0paddr; 722 723 #ifdef VERBOSE_INIT_ARM 724 printf("done!\n"); 725 #endif 726 727 #ifdef PLCONSOLE 728 /* 729 * The IFPGA registers have just moved. 730 * Detach the diagnostic serial port and reattach at the new address. 731 */ 732 plcomcndetach(); 733 #endif 734 735 /* 736 * XXX this should only be done in main() but it useful to 737 * have output earlier ... 738 */ 739 consinit(); 740 741 #ifdef VERBOSE_INIT_ARM 742 printf("bootstrap done.\n"); 743 #endif 744 745 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 746 747 /* 748 * Pages were allocated during the secondary bootstrap for the 749 * stacks for different CPU modes. 750 * We must now set the r13 registers in the different CPU modes to 751 * point to these stacks. 752 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 753 * of the stack memory. 754 */ 755 printf("init subsystems: stacks "); 756 757 set_stackptr(PSR_IRQ32_MODE, 758 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 759 set_stackptr(PSR_ABT32_MODE, 760 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 761 set_stackptr(PSR_UND32_MODE, 762 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 763 764 /* 765 * Well we should set a data abort handler. 766 * Once things get going this will change as we will need a proper 767 * handler. 768 * Until then we will use a handler that just panics but tells us 769 * why. 770 * Initialisation of the vectors will just panic on a data abort. 771 * This just fills in a slighly better one. 772 */ 773 printf("vectors "); 774 data_abort_handler_address = (u_int)data_abort_handler; 775 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 776 undefined_handler_address = (u_int)undefinedinstruction_bounce; 777 778 /* Initialise the undefined instruction handlers */ 779 printf("undefined "); 780 undefined_init(); 781 782 /* Load memory into UVM. */ 783 printf("page "); 784 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 785 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 786 atop(physical_freestart), atop(physical_freeend), 787 VM_FREELIST_DEFAULT); 788 789 /* Boot strap pmap telling it where the kernel page table is */ 790 printf("pmap "); 791 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 792 KERNEL_VM_BASE + KERNEL_VM_SIZE); 793 794 /* Setup the IRQ system */ 795 printf("irq "); 796 irq_init(); 797 798 printf("done.\n"); 799 800 #ifdef IPKDB 801 /* Initialise ipkdb */ 802 ipkdb_init(); 803 if (boothowto & RB_KDB) 804 ipkdb_connect(0); 805 #endif 806 807 #if NKSYMS || defined(DDB) || defined(LKM) 808 /* Firmware doesn't load symbols. */ 809 ksyms_init(0, NULL, NULL); 810 #endif 811 812 #ifdef DDB 813 db_machine_init(); 814 if (boothowto & RB_KDB) 815 Debugger(); 816 #endif 817 818 /* We return the new stack pointer address */ 819 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 820 } 821 822 void 823 consinit(void) 824 { 825 static int consinit_called = 0; 826 #if NPLCOM > 0 && defined(PLCONSOLE) 827 static struct bus_space plcom_bus_space; 828 #endif 829 #if 0 830 char *console = CONSDEVNAME; 831 #endif 832 833 if (consinit_called != 0) 834 return; 835 836 consinit_called = 1; 837 838 #if NPLCOM > 0 && defined(PLCONSOLE) 839 if (PLCOMCNUNIT == 0) { 840 ifpga_create_io_bs_tag(&plcom_bus_space, 841 (void*)UART0_BOOT_BASE); 842 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 843 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 844 panic("can't init serial console"); 845 return; 846 } else if (PLCOMCNUNIT == 1) { 847 ifpga_create_io_bs_tag(&plcom_bus_space, 848 (void*)UART0_BOOT_BASE); 849 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 850 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 851 panic("can't init serial console"); 852 return; 853 } 854 #endif 855 #if (NCOM > 0) 856 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 857 COM_FREQ, comcnmode)) 858 panic("can't init serial console @%x", CONCOMADDR); 859 return; 860 #endif 861 panic("No serial console configured"); 862 } 863 864 static void 865 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 866 { 867 volatile unsigned long *cm_sdram 868 = (volatile unsigned long *)0x10000020; 869 870 *memstart = 0; 871 872 switch ((*cm_sdram >> 2) & 0x7) 873 { 874 case 0: 875 *memsize = 16 * 1024 * 1024; 876 break; 877 case 1: 878 *memsize = 32 * 1024 * 1024; 879 break; 880 case 2: 881 *memsize = 64 * 1024 * 1024; 882 break; 883 case 3: 884 *memsize = 128 * 1024 * 1024; 885 break; 886 case 4: 887 *memsize = 256 * 1024 * 1024; 888 break; 889 default: 890 printf("CM_SDRAM retuns unknown value, using 16M\n"); 891 *memsize = 16 * 1024 * 1024; 892 break; 893 } 894 } 895
Indexes created Tue Sep 30 07:10:03 GMT 2025