integrator_machdep.c revision 1.38
1 /* $NetBSD: integrator_machdep.c,v 1.38 2003/05/17 23:47:00 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 { 264 265 /* 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 paddr_t memstart; 393 psize_t memsize; 394 #if NPLCOM > 0 && defined(PLCONSOLE) 395 static struct bus_space plcom_bus_space; 396 #endif 397 398 /* 399 * Heads up ... Setup the CPU / MMU / TLB functions 400 */ 401 if (set_cpufuncs()) 402 panic("cpu not recognized!"); 403 404 #if NPLCOM > 0 && defined(PLCONSOLE) 405 /* 406 * Initialise the diagnostic serial console 407 * This allows a means of generating output during initarm(). 408 * Once all the memory map changes are complete we can call consinit() 409 * and not have to worry about things moving. 410 */ 411 412 if (PLCOMCNUNIT == 0) { 413 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 414 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 415 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 416 } else if (PLCOMCNUNIT == 1) { 417 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 418 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 419 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 420 } 421 #endif 422 423 #ifdef VERBOSE_INIT_ARM 424 /* Talk to the user */ 425 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 426 #endif 427 428 /* 429 * Ok we have the following memory map 430 * 431 * XXX NO WE DON'T 432 * 433 * virtual address == physical address apart from the areas: 434 * 0x00000000 -> 0x000fffff which is mapped to 435 * top 1MB of physical memory 436 * 0x00100000 -> 0x0fffffff which is mapped to 437 * physical addresses 0x00100000 -> 0x0fffffff 438 * 0x10000000 -> 0x1fffffff which is mapped to 439 * physical addresses 0x00000000 -> 0x0fffffff 440 * 0x20000000 -> 0xefffffff which is mapped to 441 * physical addresses 0x20000000 -> 0xefffffff 442 * 0xf0000000 -> 0xf03fffff which is mapped to 443 * physical addresses 0x00000000 -> 0x003fffff 444 * 445 * This means that the kernel is mapped suitably for continuing 446 * execution, all I/O is mapped 1:1 virtual to physical and 447 * physical memory is accessible. 448 * 449 * The initarm() has the responsibility for creating the kernel 450 * page tables. 451 * It must also set up various memory pointers that are used 452 * by pmap etc. 453 */ 454 455 /* 456 * Fetch the SDRAM start/size from the CM configuration registers. 457 */ 458 integrator_sdram_bounds(&memstart, &memsize); 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("initarm: Configuring system ...\n"); 462 #endif 463 464 /* Fake bootconfig structure for the benefit of pmap.c */ 465 /* XXX must make the memory description h/w independent */ 466 bootconfig.dramblocks = 1; 467 bootconfig.dram[0].address = memstart; 468 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 469 470 /* 471 * Set up the variables that define the availablilty of 472 * physical memory. For now, we're going to set 473 * physical_freestart to 0x00200000 (where the kernel 474 * was loaded), and allocate the memory we need downwards. 475 * If we get too close to the L1 table that we set up, we 476 * will panic. We will update physical_freestart and 477 * physical_freeend later to reflect what pmap_bootstrap() 478 * wants to see. 479 * 480 * XXX pmap_bootstrap() needs an enema. 481 */ 482 physical_start = bootconfig.dram[0].address; 483 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 484 485 physical_freestart = 0x00009000UL; 486 physical_freeend = 0x00200000UL; 487 488 physmem = (physical_end - physical_start) / PAGE_SIZE; 489 490 #ifdef VERBOSE_INIT_ARM 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 #endif 495 496 /* 497 * Okay, the kernel starts 2MB in from the bottom of physical 498 * memory. We are going to allocate our bootstrap pages downwards 499 * from there. 500 * 501 * We need to allocate some fixed page tables to get the kernel 502 * going. We allocate one page directory and a number of page 503 * tables and store the physical addresses in the kernel_pt_table 504 * array. 505 * 506 * The kernel page directory must be on a 16K boundary. The page 507 * tables must be on 4K bounaries. What we do is allocate the 508 * page directory on the first 16K boundary that we encounter, and 509 * the page tables on 4K boundaries otherwise. Since we allocate 510 * at least 3 L2 page tables, we are guaranteed to encounter at 511 * least one 16K aligned region. 512 */ 513 514 #ifdef VERBOSE_INIT_ARM 515 printf("Allocating page tables\n"); 516 #endif 517 518 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 519 520 #ifdef VERBOSE_INIT_ARM 521 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 522 physical_freestart, free_pages, free_pages); 523 #endif 524 525 /* Define a macro to simplify memory allocation */ 526 #define valloc_pages(var, np) \ 527 alloc_pages((var).pv_pa, (np)); \ 528 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 529 530 #define alloc_pages(var, np) \ 531 physical_freeend -= ((np) * PAGE_SIZE); \ 532 if (physical_freeend < physical_freestart) \ 533 panic("initarm: out of memory"); \ 534 (var) = physical_freeend; \ 535 free_pages -= (np); \ 536 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 537 538 loop1 = 0; 539 kernel_l1pt.pv_pa = 0; 540 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 541 /* Are we 16KB aligned for an L1 ? */ 542 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 543 && kernel_l1pt.pv_pa == 0) { 544 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 545 } else { 546 valloc_pages(kernel_pt_table[loop1], 547 L2_TABLE_SIZE / PAGE_SIZE); 548 ++loop1; 549 } 550 } 551 552 /* This should never be able to happen but better confirm that. */ 553 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 554 panic("initarm: Failed to align the kernel page directory"); 555 556 /* 557 * Allocate a page for the system page mapped to V0x00000000 558 * This page will just contain the system vectors and can be 559 * shared by all processes. 560 */ 561 alloc_pages(systempage.pv_pa, 1); 562 563 /* Allocate stacks for all modes */ 564 valloc_pages(irqstack, IRQ_STACK_SIZE); 565 valloc_pages(abtstack, ABT_STACK_SIZE); 566 valloc_pages(undstack, UND_STACK_SIZE); 567 valloc_pages(kernelstack, UPAGES); 568 569 #ifdef VERBOSE_INIT_ARM 570 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 571 irqstack.pv_va); 572 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 573 abtstack.pv_va); 574 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 575 undstack.pv_va); 576 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 577 kernelstack.pv_va); 578 #endif 579 580 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 581 582 /* 583 * Ok we have allocated physical pages for the primary kernel 584 * page tables 585 */ 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 589 #endif 590 591 /* 592 * Now we start construction of the L1 page table 593 * We start by mapping the L2 page tables into the L1. 594 * This means that we can replace L1 mappings later on if necessary 595 */ 596 l1pagetable = kernel_l1pt.pv_pa; 597 598 /* Map the L2 pages tables in the L1 page table */ 599 pmap_link_l2pt(l1pagetable, 0x00000000, 600 &kernel_pt_table[KERNEL_PT_SYS]); 601 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 602 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 603 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 604 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 605 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 606 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 607 608 /* update the top of the kernel VM */ 609 pmap_curmaxkvaddr = 610 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 611 612 #ifdef VERBOSE_INIT_ARM 613 printf("Mapping kernel\n"); 614 #endif 615 616 /* Now we fill in the L2 pagetable for the kernel static code/data */ 617 { 618 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 619 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 620 u_int logical; 621 622 textsize = (textsize + PGOFSET) & ~PGOFSET; 623 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 624 625 logical = 0x00200000; /* offset of kernel in RAM */ 626 627 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 628 physical_start + logical, textsize, 629 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 630 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 631 physical_start + logical, totalsize - textsize, 632 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 633 } 634 635 #ifdef VERBOSE_INIT_ARM 636 printf("Constructing L2 page tables\n"); 637 #endif 638 639 /* Map the stack pages */ 640 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 641 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 642 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 643 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 644 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 645 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 646 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 647 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 648 649 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 650 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 651 652 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 653 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 654 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 655 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 656 } 657 658 /* Map the vector page. */ 659 #if 1 660 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 661 the cache-clean code there. */ 662 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 664 #else 665 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 666 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 667 #endif 668 /* Map the core memory needed before autoconfig */ 669 loop = 0; 670 while (l1_sec_table[loop].size) { 671 vm_size_t sz; 672 673 #ifdef VERBOSE_INIT_ARM 674 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 675 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 676 l1_sec_table[loop].va); 677 #endif 678 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 679 pmap_map_section(l1pagetable, 680 l1_sec_table[loop].va + sz, 681 l1_sec_table[loop].pa + sz, 682 l1_sec_table[loop].prot, 683 l1_sec_table[loop].cache); 684 ++loop; 685 } 686 687 /* 688 * Now we have the real page tables in place so we can switch to them. 689 * Once this is done we will be running with the REAL kernel page 690 * tables. 691 */ 692 693 /* 694 * Update the physical_freestart/physical_freeend/free_pages 695 * variables. 696 */ 697 { 698 physical_freestart = physical_start + 699 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 700 KERNEL_BASE); 701 physical_freeend = physical_end; 702 free_pages = 703 (physical_freeend - physical_freestart) / PAGE_SIZE; 704 } 705 706 /* Switch tables */ 707 #ifdef VERBOSE_INIT_ARM 708 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 709 physical_freestart, free_pages, free_pages); 710 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 711 #endif 712 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 713 setttb(kernel_l1pt.pv_pa); 714 cpu_tlb_flushID(); 715 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 716 717 /* 718 * Moved from cpu_startup() as data_abort_handler() references 719 * this during uvm init 720 */ 721 proc0paddr = (struct user *)kernelstack.pv_va; 722 lwp0.l_addr = proc0paddr; 723 724 #ifdef VERBOSE_INIT_ARM 725 printf("done!\n"); 726 #endif 727 728 #ifdef PLCONSOLE 729 /* 730 * The IFPGA registers have just moved. 731 * Detach the diagnostic serial port and reattach at the new address. 732 */ 733 plcomcndetach(); 734 #endif 735 736 /* 737 * XXX this should only be done in main() but it useful to 738 * have output earlier ... 739 */ 740 consinit(); 741 742 #ifdef VERBOSE_INIT_ARM 743 printf("bootstrap done.\n"); 744 #endif 745 746 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 747 748 /* 749 * Pages were allocated during the secondary bootstrap for the 750 * stacks for different CPU modes. 751 * We must now set the r13 registers in the different CPU modes to 752 * point to these stacks. 753 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 754 * of the stack memory. 755 */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("init subsystems: stacks "); 758 #endif 759 760 set_stackptr(PSR_IRQ32_MODE, 761 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 762 set_stackptr(PSR_ABT32_MODE, 763 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 764 set_stackptr(PSR_UND32_MODE, 765 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 766 767 /* 768 * Well we should set a data abort handler. 769 * Once things get going this will change as we will need a proper 770 * handler. 771 * Until then we will use a handler that just panics but tells us 772 * why. 773 * Initialisation of the vectors will just panic on a data abort. 774 * This just fills in a slighly better one. 775 */ 776 #ifdef VERBOSE_INIT_ARM 777 printf("vectors "); 778 #endif 779 data_abort_handler_address = (u_int)data_abort_handler; 780 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 781 undefined_handler_address = (u_int)undefinedinstruction_bounce; 782 783 /* Initialise the undefined instruction handlers */ 784 #ifdef VERBOSE_INIT_ARM 785 printf("undefined "); 786 #endif 787 undefined_init(); 788 789 /* Load memory into UVM. */ 790 #ifdef VERBOSE_INIT_ARM 791 printf("page "); 792 #endif 793 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 794 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 795 atop(physical_freestart), atop(physical_freeend), 796 VM_FREELIST_DEFAULT); 797 798 /* Boot strap pmap telling it where the kernel page table is */ 799 #ifdef VERBOSE_INIT_ARM 800 printf("pmap "); 801 #endif 802 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 803 KERNEL_VM_BASE + KERNEL_VM_SIZE); 804 805 /* Setup the IRQ system */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("irq "); 808 #endif 809 irq_init(); 810 811 #ifdef VERBOSE_INIT_ARM 812 printf("done.\n"); 813 #endif 814 815 #ifdef IPKDB 816 /* Initialise ipkdb */ 817 ipkdb_init(); 818 if (boothowto & RB_KDB) 819 ipkdb_connect(0); 820 #endif 821 822 #if NKSYMS || defined(DDB) || defined(LKM) 823 /* Firmware doesn't load symbols. */ 824 ksyms_init(0, NULL, NULL); 825 #endif 826 827 #ifdef DDB 828 db_machine_init(); 829 if (boothowto & RB_KDB) 830 Debugger(); 831 #endif 832 833 /* We return the new stack pointer address */ 834 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 835 } 836 837 void 838 consinit(void) 839 { 840 static int consinit_called = 0; 841 #if NPLCOM > 0 && defined(PLCONSOLE) 842 static struct bus_space plcom_bus_space; 843 #endif 844 #if 0 845 char *console = CONSDEVNAME; 846 #endif 847 848 if (consinit_called != 0) 849 return; 850 851 consinit_called = 1; 852 853 #if NPLCOM > 0 && defined(PLCONSOLE) 854 if (PLCOMCNUNIT == 0) { 855 ifpga_create_io_bs_tag(&plcom_bus_space, 856 (void*)UART0_BOOT_BASE); 857 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 858 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 859 panic("can't init serial console"); 860 return; 861 } else if (PLCOMCNUNIT == 1) { 862 ifpga_create_io_bs_tag(&plcom_bus_space, 863 (void*)UART0_BOOT_BASE); 864 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 865 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 866 panic("can't init serial console"); 867 return; 868 } 869 #endif 870 #if (NCOM > 0) 871 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 872 COM_FREQ, comcnmode)) 873 panic("can't init serial console @%x", CONCOMADDR); 874 return; 875 #endif 876 panic("No serial console configured"); 877 } 878 879 static void 880 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 881 { 882 volatile unsigned long *cm_sdram 883 = (volatile unsigned long *)0x10000020; 884 885 *memstart = 0; 886 887 switch ((*cm_sdram >> 2) & 0x7) 888 { 889 case 0: 890 *memsize = 16 * 1024 * 1024; 891 break; 892 case 1: 893 *memsize = 32 * 1024 * 1024; 894 break; 895 case 2: 896 *memsize = 64 * 1024 * 1024; 897 break; 898 case 3: 899 *memsize = 128 * 1024 * 1024; 900 break; 901 case 4: 902 *memsize = 256 * 1024 * 1024; 903 break; 904 default: 905 printf("CM_SDRAM retuns unknown value, using 16M\n"); 906 *memsize = 16 * 1024 * 1024; 907 break; 908 } 909 } 910
Indexes created Tue Sep 30 20:09:53 GMT 2025