integrator_machdep.c revision 1.35
1 /* $NetBSD: integrator_machdep.c,v 1.35 2003/05/03 03:49:05 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 * Address to call from cpu_reset() to reset the machine. 111 * This is machine architecture dependant as it varies depending 112 * on where the ROM appears when you turn the MMU off. 113 */ 114 115 u_int cpu_reset_address = (u_int) ifpga_reset; 116 117 /* Define various stack sizes in pages */ 118 #define IRQ_STACK_SIZE 1 119 #define ABT_STACK_SIZE 1 120 #ifdef IPKDB 121 #define UND_STACK_SIZE 2 122 #else 123 #define UND_STACK_SIZE 1 124 #endif 125 126 BootConfig bootconfig; /* Boot config storage */ 127 char *boot_args = NULL; 128 char *boot_file = NULL; 129 130 vm_offset_t physical_start; 131 vm_offset_t physical_freestart; 132 vm_offset_t physical_freeend; 133 vm_offset_t physical_end; 134 u_int free_pages; 135 vm_offset_t pagetables_start; 136 int physmem = 0; 137 138 /*int debug_flags;*/ 139 #ifndef PMAP_STATIC_L1S 140 int max_processes = 64; /* Default number */ 141 #endif /* !PMAP_STATIC_L1S */ 142 143 /* Physical and virtual addresses for some global pages */ 144 pv_addr_t systempage; 145 pv_addr_t irqstack; 146 pv_addr_t undstack; 147 pv_addr_t abtstack; 148 pv_addr_t kernelstack; 149 150 vm_offset_t msgbufphys; 151 152 extern u_int data_abort_handler_address; 153 extern u_int prefetch_abort_handler_address; 154 extern u_int undefined_handler_address; 155 156 #ifdef PMAP_DEBUG 157 extern int pmap_debug_level; 158 #endif 159 160 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 161 162 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 163 #define KERNEL_PT_KERNEL_NUM 2 164 /* L2 tables for mapping kernel VM */ 165 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 166 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 167 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 168 169 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 170 171 struct user *proc0paddr; 172 173 /* Prototypes */ 174 175 static void integrator_sdram_bounds (paddr_t *, psize_t *); 176 177 void consinit(void); 178 179 /* A load of console goo. */ 180 #include "vga.h" 181 #if NVGA > 0 182 #include <dev/ic/mc6845reg.h> 183 #include <dev/ic/pcdisplayvar.h> 184 #include <dev/ic/vgareg.h> 185 #include <dev/ic/vgavar.h> 186 #endif 187 188 #include "pckbc.h" 189 #if NPCKBC > 0 190 #include <dev/ic/i8042reg.h> 191 #include <dev/ic/pckbcvar.h> 192 #endif 193 194 #include "com.h" 195 #if NCOM > 0 196 #include <dev/ic/comreg.h> 197 #include <dev/ic/comvar.h> 198 #ifndef CONCOMADDR 199 #define CONCOMADDR 0x3f8 200 #endif 201 #endif 202 203 /* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207 #ifndef CONSPEED 208 #define CONSPEED B115200 209 #endif 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 #include "plcom.h" 218 #if (NPLCOM > 0) 219 #include <evbarm/dev/plcomreg.h> 220 #include <evbarm/dev/plcomvar.h> 221 222 #include <evbarm/ifpga/ifpgamem.h> 223 #include <evbarm/ifpga/ifpgareg.h> 224 #include <evbarm/ifpga/ifpgavar.h> 225 #endif 226 227 #ifndef CONSDEVNAME 228 #define CONSDEVNAME "plcom" 229 #endif 230 231 #ifndef PLCONSPEED 232 #define PLCONSPEED B38400 233 #endif 234 #ifndef PLCONMODE 235 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 236 #endif 237 #ifndef PLCOMCNUNIT 238 #define PLCOMCNUNIT -1 239 #endif 240 241 int plcomcnspeed = PLCONSPEED; 242 int plcomcnmode = PLCONMODE; 243 244 #if 0 245 extern struct consdev kcomcons; 246 static void kcomcnputc(dev_t, int); 247 #endif 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 #ifdef DIAGNOSTIC 261 /* info */ 262 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 263 #endif 264 265 /* 266 * If we are still cold then hit the air brakes 267 * and crash to earth fast 268 */ 269 if (cold) { 270 doshutdownhooks(); 271 printf("The operating system has halted.\n"); 272 printf("Please press any key to reboot.\n\n"); 273 cngetc(); 274 printf("rebooting...\n"); 275 ifpga_reset(); 276 /*NOTREACHED*/ 277 } 278 279 /* Disable console buffering */ 280 281 /* 282 * If RB_NOSYNC was not specified sync the discs. 283 * Note: Unless cold is set to 1 here, syslogd will die during the 284 * unmount. It looks like syslogd is getting woken up only to find 285 * that it cannot page part of the binary in as the filesystem has 286 * been unmounted. 287 */ 288 if (!(howto & RB_NOSYNC)) 289 bootsync(); 290 291 /* Say NO to interrupts */ 292 splhigh(); 293 294 /* Do a dump if requested. */ 295 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 296 dumpsys(); 297 298 /* Run any shutdown hooks */ 299 doshutdownhooks(); 300 301 /* Make sure IRQ's are disabled */ 302 IRQdisable; 303 304 if (howto & RB_HALT) { 305 printf("The operating system has halted.\n"); 306 printf("Please press any key to reboot.\n\n"); 307 cngetc(); 308 } 309 310 printf("rebooting...\n"); 311 ifpga_reset(); 312 /*NOTREACHED*/ 313 } 314 315 /* 316 * Mapping table for core kernel memory. This memory is mapped at init 317 * time with section mappings. 318 */ 319 struct l1_sec_map { 320 vaddr_t va; 321 vaddr_t pa; 322 vsize_t size; 323 vm_prot_t prot; 324 int cache; 325 } l1_sec_table[] = { 326 #if NPLCOM > 0 && defined(PLCONSOLE) 327 { 328 UART0_BOOT_BASE, 329 IFPGA_IO_BASE + IFPGA_UART0, 330 1024 * 1024, 331 VM_PROT_READ|VM_PROT_WRITE, 332 PTE_NOCACHE 333 }, 334 335 { 336 UART1_BOOT_BASE, 337 IFPGA_IO_BASE + IFPGA_UART1, 338 1024 * 1024, 339 VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE 341 }, 342 #endif 343 #if NPCI > 0 344 { 345 IFPGA_PCI_IO_VBASE, 346 IFPGA_PCI_IO_BASE, 347 IFPGA_PCI_IO_VSIZE, 348 VM_PROT_READ|VM_PROT_WRITE, 349 PTE_NOCACHE 350 }, 351 352 { 353 IFPGA_PCI_CONF_VBASE, 354 IFPGA_PCI_CONF_BASE, 355 IFPGA_PCI_CONF_VSIZE, 356 VM_PROT_READ|VM_PROT_WRITE, 357 PTE_NOCACHE }, 358 #endif 359 360 { 361 0, 362 0, 363 0, 364 0, 365 0 366 } 367 }; 368 369 /* 370 * u_int initarm(...) 371 * 372 * Initial entry point on startup. This gets called before main() is 373 * entered. 374 * It should be responsible for setting up everything that must be 375 * in place when main is called. 376 * This includes 377 * Taking a copy of the boot configuration structure. 378 * Initialising the physical console so characters can be printed. 379 * Setting up page tables for the kernel 380 * Relocating the kernel to the bottom of physical memory 381 */ 382 383 u_int 384 initarm(void *arg) 385 { 386 int loop; 387 int loop1; 388 u_int l1pagetable; 389 extern int etext asm ("_etext"); 390 extern int end asm ("_end"); 391 pv_addr_t kernel_l1pt; 392 pv_addr_t kernel_ptpt; 393 paddr_t memstart; 394 psize_t memsize; 395 #if NPLCOM > 0 && defined(PLCONSOLE) 396 static struct bus_space plcom_bus_space; 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 #if NPLCOM > 0 && defined(PLCONSOLE) 406 /* 407 * Initialise the diagnostic serial console 408 * This allows a means of generating output during initarm(). 409 * Once all the memory map changes are complete we can call consinit() 410 * and not have to worry about things moving. 411 */ 412 413 if (PLCOMCNUNIT == 0) { 414 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 415 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 416 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 417 } else if (PLCOMCNUNIT == 1) { 418 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 419 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 420 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 421 } 422 #endif 423 424 /* Talk to the user */ 425 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 426 427 /* 428 * Ok we have the following memory map 429 * 430 * XXX NO WE DON'T 431 * 432 * virtual address == physical address apart from the areas: 433 * 0x00000000 -> 0x000fffff which is mapped to 434 * top 1MB of physical memory 435 * 0x00100000 -> 0x0fffffff which is mapped to 436 * physical addresses 0x00100000 -> 0x0fffffff 437 * 0x10000000 -> 0x1fffffff which is mapped to 438 * physical addresses 0x00000000 -> 0x0fffffff 439 * 0x20000000 -> 0xefffffff which is mapped to 440 * physical addresses 0x20000000 -> 0xefffffff 441 * 0xf0000000 -> 0xf03fffff which is mapped to 442 * physical addresses 0x00000000 -> 0x003fffff 443 * 444 * This means that the kernel is mapped suitably for continuing 445 * execution, all I/O is mapped 1:1 virtual to physical and 446 * physical memory is accessible. 447 * 448 * The initarm() has the responsibility for creating the kernel 449 * page tables. 450 * It must also set up various memory pointers that are used 451 * by pmap etc. 452 */ 453 454 /* 455 * Fetch the SDRAM start/size from the CM configuration registers. 456 */ 457 integrator_sdram_bounds(&memstart, &memsize); 458 459 printf("initarm: Configuring system ...\n"); 460 461 /* Fake bootconfig structure for the benefit of pmap.c */ 462 /* XXX must make the memory description h/w independent */ 463 bootconfig.dramblocks = 1; 464 bootconfig.dram[0].address = memstart; 465 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 466 467 /* 468 * Set up the variables that define the availablilty of 469 * physical memory. For now, we're going to set 470 * physical_freestart to 0x00200000 (where the kernel 471 * was loaded), and allocate the memory we need downwards. 472 * If we get too close to the L1 table that we set up, we 473 * will panic. We will update physical_freestart and 474 * physical_freeend later to reflect what pmap_bootstrap() 475 * wants to see. 476 * 477 * XXX pmap_bootstrap() needs an enema. 478 */ 479 physical_start = bootconfig.dram[0].address; 480 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 481 482 physical_freestart = 0x00009000UL; 483 physical_freeend = 0x00200000UL; 484 485 physmem = (physical_end - physical_start) / PAGE_SIZE; 486 487 /* Tell the user about the memory */ 488 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 489 physical_start, physical_end - 1); 490 491 /* 492 * Okay, the kernel starts 2MB in from the bottom of physical 493 * memory. We are going to allocate our bootstrap pages downwards 494 * from there. 495 * 496 * We need to allocate some fixed page tables to get the kernel 497 * going. We allocate one page directory and a number of page 498 * tables and store the physical addresses in the kernel_pt_table 499 * array. 500 * 501 * The kernel page directory must be on a 16K boundary. The page 502 * tables must be on 4K bounaries. What we do is allocate the 503 * page directory on the first 16K boundary that we encounter, and 504 * the page tables on 4K boundaries otherwise. Since we allocate 505 * at least 3 L2 page tables, we are guaranteed to encounter at 506 * least one 16K aligned region. 507 */ 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("Allocating page tables\n"); 511 #endif 512 513 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 517 physical_freestart, free_pages, free_pages); 518 #endif 519 520 /* Define a macro to simplify memory allocation */ 521 #define valloc_pages(var, np) \ 522 alloc_pages((var).pv_pa, (np)); \ 523 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 524 525 #define alloc_pages(var, np) \ 526 physical_freeend -= ((np) * PAGE_SIZE); \ 527 if (physical_freeend < physical_freestart) \ 528 panic("initarm: out of memory"); \ 529 (var) = physical_freeend; \ 530 free_pages -= (np); \ 531 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 532 533 loop1 = 0; 534 kernel_l1pt.pv_pa = 0; 535 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 536 /* Are we 16KB aligned for an L1 ? */ 537 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 538 && kernel_l1pt.pv_pa == 0) { 539 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 540 } else { 541 valloc_pages(kernel_pt_table[loop1], 542 L2_TABLE_SIZE / PAGE_SIZE); 543 ++loop1; 544 } 545 } 546 547 /* This should never be able to happen but better confirm that. */ 548 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 549 panic("initarm: Failed to align the kernel page directory"); 550 551 /* 552 * Allocate a page for the system page mapped to V0x00000000 553 * This page will just contain the system vectors and can be 554 * shared by all processes. 555 */ 556 alloc_pages(systempage.pv_pa, 1); 557 558 /* Allocate stacks for all modes */ 559 valloc_pages(irqstack, IRQ_STACK_SIZE); 560 valloc_pages(abtstack, ABT_STACK_SIZE); 561 valloc_pages(undstack, UND_STACK_SIZE); 562 valloc_pages(kernelstack, UPAGES); 563 564 #ifdef VERBOSE_INIT_ARM 565 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 566 irqstack.pv_va); 567 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 568 abtstack.pv_va); 569 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 570 undstack.pv_va); 571 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 572 kernelstack.pv_va); 573 #endif 574 575 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 576 577 /* 578 * Ok we have allocated physical pages for the primary kernel 579 * page tables 580 */ 581 582 #ifdef VERBOSE_INIT_ARM 583 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 584 #endif 585 586 /* 587 * Now we start construction of the L1 page table 588 * We start by mapping the L2 page tables into the L1. 589 * This means that we can replace L1 mappings later on if necessary 590 */ 591 l1pagetable = kernel_l1pt.pv_pa; 592 593 /* Map the L2 pages tables in the L1 page table */ 594 pmap_link_l2pt(l1pagetable, 0x00000000, 595 &kernel_pt_table[KERNEL_PT_SYS]); 596 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 597 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 598 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 599 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 600 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 601 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 602 603 /* update the top of the kernel VM */ 604 pmap_curmaxkvaddr = 605 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 606 607 #ifdef VERBOSE_INIT_ARM 608 printf("Mapping kernel\n"); 609 #endif 610 611 /* Now we fill in the L2 pagetable for the kernel static code/data */ 612 { 613 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 614 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 615 u_int logical; 616 617 textsize = (textsize + PGOFSET) & ~PGOFSET; 618 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 619 620 logical = 0x00200000; /* offset of kernel in RAM */ 621 622 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 623 physical_start + logical, textsize, 624 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 626 physical_start + logical, totalsize - textsize, 627 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 628 } 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Constructing L2 page tables\n"); 632 #endif 633 634 /* Map the stack pages */ 635 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 636 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 637 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 638 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 640 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 642 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 644 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 645 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 646 647 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 648 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 649 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 650 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 651 } 652 653 /* Map the vector page. */ 654 #if 1 655 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 656 the cache-clean code there. */ 657 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 658 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 659 #else 660 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 661 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 662 #endif 663 /* Map the core memory needed before autoconfig */ 664 loop = 0; 665 while (l1_sec_table[loop].size) { 666 vm_size_t sz; 667 668 #ifdef VERBOSE_INIT_ARM 669 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 670 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 671 l1_sec_table[loop].va); 672 #endif 673 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 674 pmap_map_section(l1pagetable, 675 l1_sec_table[loop].va + sz, 676 l1_sec_table[loop].pa + sz, 677 l1_sec_table[loop].prot, 678 l1_sec_table[loop].cache); 679 ++loop; 680 } 681 682 /* 683 * Now we have the real page tables in place so we can switch to them. 684 * Once this is done we will be running with the REAL kernel page 685 * tables. 686 */ 687 688 /* 689 * Update the physical_freestart/physical_freeend/free_pages 690 * variables. 691 */ 692 { 693 physical_freestart = physical_start + 694 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 695 KERNEL_BASE); 696 physical_freeend = physical_end; 697 free_pages = 698 (physical_freeend - physical_freestart) / PAGE_SIZE; 699 } 700 701 /* Switch tables */ 702 #ifdef VERBOSE_INIT_ARM 703 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 704 physical_freestart, free_pages, free_pages); 705 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 706 #endif 707 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 708 setttb(kernel_l1pt.pv_pa); 709 cpu_tlb_flushID(); 710 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 711 712 /* 713 * Moved from cpu_startup() as data_abort_handler() references 714 * this during uvm init 715 */ 716 proc0paddr = (struct user *)kernelstack.pv_va; 717 lwp0.l_addr = proc0paddr; 718 719 #ifdef VERBOSE_INIT_ARM 720 printf("done!\n"); 721 #endif 722 723 #ifdef PLCONSOLE 724 /* 725 * The IFPGA registers have just moved. 726 * Detach the diagnostic serial port and reattach at the new address. 727 */ 728 plcomcndetach(); 729 #endif 730 731 /* 732 * XXX this should only be done in main() but it useful to 733 * have output earlier ... 734 */ 735 consinit(); 736 737 #ifdef VERBOSE_INIT_ARM 738 printf("bootstrap done.\n"); 739 #endif 740 741 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 742 743 /* 744 * Pages were allocated during the secondary bootstrap for the 745 * stacks for different CPU modes. 746 * We must now set the r13 registers in the different CPU modes to 747 * point to these stacks. 748 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 749 * of the stack memory. 750 */ 751 printf("init subsystems: stacks "); 752 753 set_stackptr(PSR_IRQ32_MODE, 754 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 755 set_stackptr(PSR_ABT32_MODE, 756 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 757 set_stackptr(PSR_UND32_MODE, 758 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 759 760 /* 761 * Well we should set a data abort handler. 762 * Once things get going this will change as we will need a proper 763 * handler. 764 * Until then we will use a handler that just panics but tells us 765 * why. 766 * Initialisation of the vectors will just panic on a data abort. 767 * This just fills in a slighly better one. 768 */ 769 printf("vectors "); 770 data_abort_handler_address = (u_int)data_abort_handler; 771 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 772 undefined_handler_address = (u_int)undefinedinstruction_bounce; 773 774 /* Initialise the undefined instruction handlers */ 775 printf("undefined "); 776 undefined_init(); 777 778 /* Load memory into UVM. */ 779 printf("page "); 780 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 781 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 782 atop(physical_freestart), atop(physical_freeend), 783 VM_FREELIST_DEFAULT); 784 785 /* Boot strap pmap telling it where the kernel page table is */ 786 printf("pmap "); 787 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 788 KERNEL_VM_BASE + KERNEL_VM_SIZE); 789 790 /* Setup the IRQ system */ 791 printf("irq "); 792 irq_init(); 793 794 printf("done.\n"); 795 796 #ifdef IPKDB 797 /* Initialise ipkdb */ 798 ipkdb_init(); 799 if (boothowto & RB_KDB) 800 ipkdb_connect(0); 801 #endif 802 803 #if NKSYMS || defined(DDB) || defined(LKM) 804 /* Firmware doesn't load symbols. */ 805 ksyms_init(0, NULL, NULL); 806 #endif 807 808 #ifdef DDB 809 db_machine_init(); 810 if (boothowto & RB_KDB) 811 Debugger(); 812 #endif 813 814 /* We return the new stack pointer address */ 815 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 816 } 817 818 void 819 consinit(void) 820 { 821 static int consinit_called = 0; 822 #if NPLCOM > 0 && defined(PLCONSOLE) 823 static struct bus_space plcom_bus_space; 824 #endif 825 #if 0 826 char *console = CONSDEVNAME; 827 #endif 828 829 if (consinit_called != 0) 830 return; 831 832 consinit_called = 1; 833 834 #if NPLCOM > 0 && defined(PLCONSOLE) 835 if (PLCOMCNUNIT == 0) { 836 ifpga_create_io_bs_tag(&plcom_bus_space, 837 (void*)UART0_BOOT_BASE); 838 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 839 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 840 panic("can't init serial console"); 841 return; 842 } else if (PLCOMCNUNIT == 1) { 843 ifpga_create_io_bs_tag(&plcom_bus_space, 844 (void*)UART0_BOOT_BASE); 845 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 846 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 847 panic("can't init serial console"); 848 return; 849 } 850 #endif 851 #if (NCOM > 0) 852 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 853 COM_FREQ, comcnmode)) 854 panic("can't init serial console @%x", CONCOMADDR); 855 return; 856 #endif 857 panic("No serial console configured"); 858 } 859 860 static void 861 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 862 { 863 volatile unsigned long *cm_sdram 864 = (volatile unsigned long *)0x10000020; 865 866 *memstart = 0; 867 868 switch ((*cm_sdram >> 2) & 0x7) 869 { 870 case 0: 871 *memsize = 16 * 1024 * 1024; 872 break; 873 case 1: 874 *memsize = 32 * 1024 * 1024; 875 break; 876 case 2: 877 *memsize = 64 * 1024 * 1024; 878 break; 879 case 3: 880 *memsize = 128 * 1024 * 1024; 881 break; 882 case 4: 883 *memsize = 256 * 1024 * 1024; 884 break; 885 default: 886 printf("CM_SDRAM retuns unknown value, using 16M\n"); 887 *memsize = 16 * 1024 * 1024; 888 break; 889 } 890 } 891
Indexes created Tue Sep 30 07:10:03 GMT 2025