integrator_machdep.c revision 1.39
1 /* $NetBSD: integrator_machdep.c,v 1.39 2003/05/21 22:48:22 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 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 113 114 /* 115 * Address to call from cpu_reset() to reset the machine. 116 * This is machine architecture dependant as it varies depending 117 * on where the ROM appears when you turn the MMU off. 118 */ 119 120 u_int cpu_reset_address = (u_int) ifpga_reset; 121 122 /* Define various stack sizes in pages */ 123 #define IRQ_STACK_SIZE 1 124 #define ABT_STACK_SIZE 1 125 #ifdef IPKDB 126 #define UND_STACK_SIZE 2 127 #else 128 #define UND_STACK_SIZE 1 129 #endif 130 131 BootConfig bootconfig; /* Boot config storage */ 132 char *boot_args = NULL; 133 char *boot_file = NULL; 134 135 vm_offset_t physical_start; 136 vm_offset_t physical_freestart; 137 vm_offset_t physical_freeend; 138 vm_offset_t physical_end; 139 u_int free_pages; 140 vm_offset_t pagetables_start; 141 int physmem = 0; 142 143 /*int debug_flags;*/ 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 /* Physical and virtual addresses for some global pages */ 149 pv_addr_t systempage; 150 pv_addr_t irqstack; 151 pv_addr_t undstack; 152 pv_addr_t abtstack; 153 pv_addr_t kernelstack; 154 155 vm_offset_t msgbufphys; 156 157 extern u_int data_abort_handler_address; 158 extern u_int prefetch_abort_handler_address; 159 extern u_int undefined_handler_address; 160 161 #ifdef PMAP_DEBUG 162 extern int pmap_debug_level; 163 #endif 164 165 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 166 167 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 168 #define KERNEL_PT_KERNEL_NUM 2 169 /* L2 tables for mapping kernel VM */ 170 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 171 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 172 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 173 174 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 175 176 struct user *proc0paddr; 177 178 /* Prototypes */ 179 180 static void integrator_sdram_bounds (paddr_t *, psize_t *); 181 182 void consinit(void); 183 184 /* A load of console goo. */ 185 #include "vga.h" 186 #if NVGA > 0 187 #include <dev/ic/mc6845reg.h> 188 #include <dev/ic/pcdisplayvar.h> 189 #include <dev/ic/vgareg.h> 190 #include <dev/ic/vgavar.h> 191 #endif 192 193 #include "pckbc.h" 194 #if NPCKBC > 0 195 #include <dev/ic/i8042reg.h> 196 #include <dev/ic/pckbcvar.h> 197 #endif 198 199 #include "com.h" 200 #if NCOM > 0 201 #include <dev/ic/comreg.h> 202 #include <dev/ic/comvar.h> 203 #ifndef CONCOMADDR 204 #define CONCOMADDR 0x3f8 205 #endif 206 #endif 207 208 /* 209 * Define the default console speed for the board. This is generally 210 * what the firmware provided with the board defaults to. 211 */ 212 #ifndef CONSPEED 213 #define CONSPEED B115200 214 #endif 215 #ifndef CONMODE 216 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 217 #endif 218 219 int comcnspeed = CONSPEED; 220 int comcnmode = CONMODE; 221 222 #include "plcom.h" 223 #if (NPLCOM > 0) 224 #include <evbarm/dev/plcomreg.h> 225 #include <evbarm/dev/plcomvar.h> 226 227 #include <evbarm/ifpga/ifpgamem.h> 228 #include <evbarm/ifpga/ifpgareg.h> 229 #include <evbarm/ifpga/ifpgavar.h> 230 #endif 231 232 #ifndef CONSDEVNAME 233 #define CONSDEVNAME "plcom" 234 #endif 235 236 #ifndef PLCONSPEED 237 #define PLCONSPEED B38400 238 #endif 239 #ifndef PLCONMODE 240 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 241 #endif 242 #ifndef PLCOMCNUNIT 243 #define PLCOMCNUNIT -1 244 #endif 245 246 int plcomcnspeed = PLCONSPEED; 247 int plcomcnmode = PLCONMODE; 248 249 #if 0 250 extern struct consdev kcomcons; 251 static void kcomcnputc(dev_t, int); 252 #endif 253 254 /* 255 * void cpu_reboot(int howto, char *bootstr) 256 * 257 * Reboots the system 258 * 259 * Deal with any syncing, unmounting, dumping and shutdown hooks, 260 * then reset the CPU. 261 */ 262 void 263 cpu_reboot(int howto, char *bootstr) 264 { 265 266 /* 267 * If we are still cold then hit the air brakes 268 * and crash to earth fast 269 */ 270 if (cold) { 271 doshutdownhooks(); 272 printf("The operating system has halted.\n"); 273 printf("Please press any key to reboot.\n\n"); 274 cngetc(); 275 printf("rebooting...\n"); 276 ifpga_reset(); 277 /*NOTREACHED*/ 278 } 279 280 /* Disable console buffering */ 281 282 /* 283 * If RB_NOSYNC was not specified sync the discs. 284 * Note: Unless cold is set to 1 here, syslogd will die during the 285 * unmount. It looks like syslogd is getting woken up only to find 286 * that it cannot page part of the binary in as the filesystem has 287 * been unmounted. 288 */ 289 if (!(howto & RB_NOSYNC)) 290 bootsync(); 291 292 /* Say NO to interrupts */ 293 splhigh(); 294 295 /* Do a dump if requested. */ 296 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 297 dumpsys(); 298 299 /* Run any shutdown hooks */ 300 doshutdownhooks(); 301 302 /* Make sure IRQ's are disabled */ 303 IRQdisable; 304 305 if (howto & RB_HALT) { 306 printf("The operating system has halted.\n"); 307 printf("Please press any key to reboot.\n\n"); 308 cngetc(); 309 } 310 311 printf("rebooting...\n"); 312 ifpga_reset(); 313 /*NOTREACHED*/ 314 } 315 316 /* 317 * Mapping table for core kernel memory. This memory is mapped at init 318 * time with section mappings. 319 */ 320 struct l1_sec_map { 321 vaddr_t va; 322 vaddr_t pa; 323 vsize_t size; 324 vm_prot_t prot; 325 int cache; 326 } l1_sec_table[] = { 327 #if NPLCOM > 0 && defined(PLCONSOLE) 328 { 329 UART0_BOOT_BASE, 330 IFPGA_IO_BASE + IFPGA_UART0, 331 1024 * 1024, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE 334 }, 335 336 { 337 UART1_BOOT_BASE, 338 IFPGA_IO_BASE + IFPGA_UART1, 339 1024 * 1024, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE 342 }, 343 #endif 344 #if NPCI > 0 345 { 346 IFPGA_PCI_IO_VBASE, 347 IFPGA_PCI_IO_BASE, 348 IFPGA_PCI_IO_VSIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE 351 }, 352 353 { 354 IFPGA_PCI_CONF_VBASE, 355 IFPGA_PCI_CONF_BASE, 356 IFPGA_PCI_CONF_VSIZE, 357 VM_PROT_READ|VM_PROT_WRITE, 358 PTE_NOCACHE }, 359 #endif 360 361 { 362 0, 363 0, 364 0, 365 0, 366 0 367 } 368 }; 369 370 /* 371 * u_int initarm(...) 372 * 373 * Initial entry point on startup. This gets called before main() is 374 * entered. 375 * It should be responsible for setting up everything that must be 376 * in place when main is called. 377 * This includes 378 * Taking a copy of the boot configuration structure. 379 * Initialising the physical console so characters can be printed. 380 * Setting up page tables for the kernel 381 * Relocating the kernel to the bottom of physical memory 382 */ 383 384 u_int 385 initarm(void *arg) 386 { 387 int loop; 388 int loop1; 389 u_int l1pagetable; 390 extern int etext asm ("_etext"); 391 extern int end asm ("_end"); 392 pv_addr_t kernel_l1pt; 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 #ifdef VERBOSE_INIT_ARM 425 /* Talk to the user */ 426 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 427 #endif 428 429 /* 430 * Ok we have the following memory map 431 * 432 * XXX NO WE DON'T 433 * 434 * virtual address == physical address apart from the areas: 435 * 0x00000000 -> 0x000fffff which is mapped to 436 * top 1MB of physical memory 437 * 0x00100000 -> 0x0fffffff which is mapped to 438 * physical addresses 0x00100000 -> 0x0fffffff 439 * 0x10000000 -> 0x1fffffff which is mapped to 440 * physical addresses 0x00000000 -> 0x0fffffff 441 * 0x20000000 -> 0xefffffff which is mapped to 442 * physical addresses 0x20000000 -> 0xefffffff 443 * 0xf0000000 -> 0xf03fffff which is mapped to 444 * physical addresses 0x00000000 -> 0x003fffff 445 * 446 * This means that the kernel is mapped suitably for continuing 447 * execution, all I/O is mapped 1:1 virtual to physical and 448 * physical memory is accessible. 449 * 450 * The initarm() has the responsibility for creating the kernel 451 * page tables. 452 * It must also set up various memory pointers that are used 453 * by pmap etc. 454 */ 455 456 /* 457 * Fetch the SDRAM start/size from the CM configuration registers. 458 */ 459 integrator_sdram_bounds(&memstart, &memsize); 460 461 #ifdef VERBOSE_INIT_ARM 462 printf("initarm: Configuring system ...\n"); 463 #endif 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 #ifdef VERBOSE_INIT_ARM 492 /* Tell the user about the memory */ 493 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 494 physical_start, physical_end - 1); 495 #endif 496 497 /* 498 * Okay, the kernel starts 2MB in from the bottom of physical 499 * memory. We are going to allocate our bootstrap pages downwards 500 * from there. 501 * 502 * We need to allocate some fixed page tables to get the kernel 503 * going. We allocate one page directory and a number of page 504 * tables and store the physical addresses in the kernel_pt_table 505 * array. 506 * 507 * The kernel page directory must be on a 16K boundary. The page 508 * tables must be on 4K bounaries. What we do is allocate the 509 * page directory on the first 16K boundary that we encounter, and 510 * the page tables on 4K boundaries otherwise. Since we allocate 511 * at least 3 L2 page tables, we are guaranteed to encounter at 512 * least one 16K aligned region. 513 */ 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("Allocating page tables\n"); 517 #endif 518 519 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 520 521 #ifdef VERBOSE_INIT_ARM 522 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 523 physical_freestart, free_pages, free_pages); 524 #endif 525 526 /* Define a macro to simplify memory allocation */ 527 #define valloc_pages(var, np) \ 528 alloc_pages((var).pv_pa, (np)); \ 529 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 530 531 #define alloc_pages(var, np) \ 532 physical_freeend -= ((np) * PAGE_SIZE); \ 533 if (physical_freeend < physical_freestart) \ 534 panic("initarm: out of memory"); \ 535 (var) = physical_freeend; \ 536 free_pages -= (np); \ 537 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 538 539 loop1 = 0; 540 kernel_l1pt.pv_pa = 0; 541 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 542 /* Are we 16KB aligned for an L1 ? */ 543 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 544 && kernel_l1pt.pv_pa == 0) { 545 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 546 } else { 547 valloc_pages(kernel_pt_table[loop1], 548 L2_TABLE_SIZE / PAGE_SIZE); 549 ++loop1; 550 } 551 } 552 553 /* This should never be able to happen but better confirm that. */ 554 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 555 panic("initarm: Failed to align the kernel page directory"); 556 557 /* 558 * Allocate a page for the system page mapped to V0x00000000 559 * This page will just contain the system vectors and can be 560 * shared by all processes. 561 */ 562 alloc_pages(systempage.pv_pa, 1); 563 564 /* Allocate stacks for all modes */ 565 valloc_pages(irqstack, IRQ_STACK_SIZE); 566 valloc_pages(abtstack, ABT_STACK_SIZE); 567 valloc_pages(undstack, UND_STACK_SIZE); 568 valloc_pages(kernelstack, UPAGES); 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 572 irqstack.pv_va); 573 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 574 abtstack.pv_va); 575 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 576 undstack.pv_va); 577 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 578 kernelstack.pv_va); 579 #endif 580 581 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 582 583 /* 584 * Ok we have allocated physical pages for the primary kernel 585 * page tables 586 */ 587 588 #ifdef VERBOSE_INIT_ARM 589 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 590 #endif 591 592 /* 593 * Now we start construction of the L1 page table 594 * We start by mapping the L2 page tables into the L1. 595 * This means that we can replace L1 mappings later on if necessary 596 */ 597 l1pagetable = kernel_l1pt.pv_pa; 598 599 /* Map the L2 pages tables in the L1 page table */ 600 pmap_link_l2pt(l1pagetable, 0x00000000, 601 &kernel_pt_table[KERNEL_PT_SYS]); 602 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 603 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 604 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 605 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 606 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 607 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 608 609 /* update the top of the kernel VM */ 610 pmap_curmaxkvaddr = 611 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("Mapping kernel\n"); 615 #endif 616 617 /* Now we fill in the L2 pagetable for the kernel static code/data */ 618 { 619 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 620 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 621 u_int logical; 622 623 textsize = (textsize + PGOFSET) & ~PGOFSET; 624 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 625 626 logical = 0x00200000; /* offset of kernel in RAM */ 627 628 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 629 physical_start + logical, textsize, 630 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 631 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 632 physical_start + logical, totalsize - textsize, 633 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 634 } 635 636 #ifdef VERBOSE_INIT_ARM 637 printf("Constructing L2 page tables\n"); 638 #endif 639 640 /* Map the stack pages */ 641 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 642 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 644 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 646 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 648 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 649 650 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 651 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 652 653 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 654 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 655 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 656 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 657 } 658 659 /* Map the vector page. */ 660 #if 1 661 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 662 the cache-clean code there. */ 663 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 664 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 665 #else 666 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 667 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 668 #endif 669 /* Map the core memory needed before autoconfig */ 670 loop = 0; 671 while (l1_sec_table[loop].size) { 672 vm_size_t sz; 673 674 #ifdef VERBOSE_INIT_ARM 675 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 676 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 677 l1_sec_table[loop].va); 678 #endif 679 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 680 pmap_map_section(l1pagetable, 681 l1_sec_table[loop].va + sz, 682 l1_sec_table[loop].pa + sz, 683 l1_sec_table[loop].prot, 684 l1_sec_table[loop].cache); 685 ++loop; 686 } 687 688 /* 689 * Now we have the real page tables in place so we can switch to them. 690 * Once this is done we will be running with the REAL kernel page 691 * tables. 692 */ 693 694 /* 695 * Update the physical_freestart/physical_freeend/free_pages 696 * variables. 697 */ 698 { 699 physical_freestart = physical_start + 700 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 701 KERNEL_BASE); 702 physical_freeend = physical_end; 703 free_pages = 704 (physical_freeend - physical_freestart) / PAGE_SIZE; 705 } 706 707 /* Switch tables */ 708 #ifdef VERBOSE_INIT_ARM 709 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 710 physical_freestart, free_pages, free_pages); 711 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 712 #endif 713 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 714 setttb(kernel_l1pt.pv_pa); 715 cpu_tlb_flushID(); 716 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 717 718 /* 719 * Moved from cpu_startup() as data_abort_handler() references 720 * this during uvm init 721 */ 722 proc0paddr = (struct user *)kernelstack.pv_va; 723 lwp0.l_addr = proc0paddr; 724 725 #ifdef VERBOSE_INIT_ARM 726 printf("done!\n"); 727 #endif 728 729 #ifdef PLCONSOLE 730 /* 731 * The IFPGA registers have just moved. 732 * Detach the diagnostic serial port and reattach at the new address. 733 */ 734 plcomcndetach(); 735 #endif 736 737 /* 738 * XXX this should only be done in main() but it useful to 739 * have output earlier ... 740 */ 741 consinit(); 742 743 #ifdef VERBOSE_INIT_ARM 744 printf("bootstrap done.\n"); 745 #endif 746 747 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 748 749 /* 750 * Pages were allocated during the secondary bootstrap for the 751 * stacks for different CPU modes. 752 * We must now set the r13 registers in the different CPU modes to 753 * point to these stacks. 754 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 755 * of the stack memory. 756 */ 757 #ifdef VERBOSE_INIT_ARM 758 printf("init subsystems: stacks "); 759 #endif 760 761 set_stackptr(PSR_IRQ32_MODE, 762 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 763 set_stackptr(PSR_ABT32_MODE, 764 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 765 set_stackptr(PSR_UND32_MODE, 766 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 767 768 /* 769 * Well we should set a data abort handler. 770 * Once things get going this will change as we will need a proper 771 * handler. 772 * Until then we will use a handler that just panics but tells us 773 * why. 774 * Initialisation of the vectors will just panic on a data abort. 775 * This just fills in a slighly better one. 776 */ 777 #ifdef VERBOSE_INIT_ARM 778 printf("vectors "); 779 #endif 780 data_abort_handler_address = (u_int)data_abort_handler; 781 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 782 undefined_handler_address = (u_int)undefinedinstruction_bounce; 783 784 /* Initialise the undefined instruction handlers */ 785 #ifdef VERBOSE_INIT_ARM 786 printf("undefined "); 787 #endif 788 undefined_init(); 789 790 /* Load memory into UVM. */ 791 #ifdef VERBOSE_INIT_ARM 792 printf("page "); 793 #endif 794 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 795 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 796 atop(physical_freestart), atop(physical_freeend), 797 VM_FREELIST_DEFAULT); 798 799 /* Boot strap pmap telling it where the kernel page table is */ 800 #ifdef VERBOSE_INIT_ARM 801 printf("pmap "); 802 #endif 803 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 804 KERNEL_VM_BASE + KERNEL_VM_SIZE); 805 806 /* Setup the IRQ system */ 807 #ifdef VERBOSE_INIT_ARM 808 printf("irq "); 809 #endif 810 irq_init(); 811 812 #ifdef VERBOSE_INIT_ARM 813 printf("done.\n"); 814 #endif 815 816 #ifdef IPKDB 817 /* Initialise ipkdb */ 818 ipkdb_init(); 819 if (boothowto & RB_KDB) 820 ipkdb_connect(0); 821 #endif 822 823 #if NKSYMS || defined(DDB) || defined(LKM) 824 /* Firmware doesn't load symbols. */ 825 ksyms_init(0, NULL, NULL); 826 #endif 827 828 #ifdef DDB 829 db_machine_init(); 830 if (boothowto & RB_KDB) 831 Debugger(); 832 #endif 833 834 /* We return the new stack pointer address */ 835 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 836 } 837 838 void 839 consinit(void) 840 { 841 static int consinit_called = 0; 842 #if NPLCOM > 0 && defined(PLCONSOLE) 843 static struct bus_space plcom_bus_space; 844 #endif 845 #if 0 846 char *console = CONSDEVNAME; 847 #endif 848 849 if (consinit_called != 0) 850 return; 851 852 consinit_called = 1; 853 854 #if NPLCOM > 0 && defined(PLCONSOLE) 855 if (PLCOMCNUNIT == 0) { 856 ifpga_create_io_bs_tag(&plcom_bus_space, 857 (void*)UART0_BOOT_BASE); 858 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 859 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 860 panic("can't init serial console"); 861 return; 862 } else if (PLCOMCNUNIT == 1) { 863 ifpga_create_io_bs_tag(&plcom_bus_space, 864 (void*)UART0_BOOT_BASE); 865 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 866 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 867 panic("can't init serial console"); 868 return; 869 } 870 #endif 871 #if (NCOM > 0) 872 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 873 COM_FREQ, comcnmode)) 874 panic("can't init serial console @%x", CONCOMADDR); 875 return; 876 #endif 877 panic("No serial console configured"); 878 } 879 880 static void 881 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 882 { 883 volatile unsigned long *cm_sdram 884 = (volatile unsigned long *)0x10000020; 885 886 *memstart = 0; 887 888 switch ((*cm_sdram >> 2) & 0x7) 889 { 890 case 0: 891 *memsize = 16 * 1024 * 1024; 892 break; 893 case 1: 894 *memsize = 32 * 1024 * 1024; 895 break; 896 case 2: 897 *memsize = 64 * 1024 * 1024; 898 break; 899 case 3: 900 *memsize = 128 * 1024 * 1024; 901 break; 902 case 4: 903 *memsize = 256 * 1024 * 1024; 904 break; 905 default: 906 printf("CM_SDRAM retuns unknown value, using 16M\n"); 907 *memsize = 16 * 1024 * 1024; 908 break; 909 } 910 } 911
Indexes created Tue Sep 30 20:09:53 GMT 2025