integrator_machdep.c revision 1.41
1 /* $NetBSD: integrator_machdep.c,v 1.41 2003/06/14 17:01:10 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 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 116 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 117 */ 118 #define KERNEL_VM_SIZE 0x0C000000 119 120 /* 121 * Address to call from cpu_reset() to reset the machine. 122 * This is machine architecture dependant as it varies depending 123 * on where the ROM appears when you turn the MMU off. 124 */ 125 126 u_int cpu_reset_address = (u_int) ifpga_reset; 127 128 /* Define various stack sizes in pages */ 129 #define IRQ_STACK_SIZE 1 130 #define ABT_STACK_SIZE 1 131 #ifdef IPKDB 132 #define UND_STACK_SIZE 2 133 #else 134 #define UND_STACK_SIZE 1 135 #endif 136 137 BootConfig bootconfig; /* Boot config storage */ 138 char *boot_args = NULL; 139 char *boot_file = NULL; 140 141 vm_offset_t physical_start; 142 vm_offset_t physical_freestart; 143 vm_offset_t physical_freeend; 144 vm_offset_t physical_end; 145 u_int free_pages; 146 vm_offset_t pagetables_start; 147 int physmem = 0; 148 149 /*int debug_flags;*/ 150 #ifndef PMAP_STATIC_L1S 151 int max_processes = 64; /* Default number */ 152 #endif /* !PMAP_STATIC_L1S */ 153 154 /* Physical and virtual addresses for some global pages */ 155 pv_addr_t systempage; 156 pv_addr_t irqstack; 157 pv_addr_t undstack; 158 pv_addr_t abtstack; 159 pv_addr_t kernelstack; 160 161 vm_offset_t msgbufphys; 162 163 extern u_int data_abort_handler_address; 164 extern u_int prefetch_abort_handler_address; 165 extern u_int undefined_handler_address; 166 167 #ifdef PMAP_DEBUG 168 extern int pmap_debug_level; 169 #endif 170 171 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 172 173 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 174 #define KERNEL_PT_KERNEL_NUM 2 175 /* L2 tables for mapping kernel VM */ 176 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 177 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 178 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 179 180 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 181 182 struct user *proc0paddr; 183 184 /* Prototypes */ 185 186 static void integrator_sdram_bounds (paddr_t *, psize_t *); 187 188 void consinit(void); 189 190 /* A load of console goo. */ 191 #include "vga.h" 192 #if NVGA > 0 193 #include <dev/ic/mc6845reg.h> 194 #include <dev/ic/pcdisplayvar.h> 195 #include <dev/ic/vgareg.h> 196 #include <dev/ic/vgavar.h> 197 #endif 198 199 #include "pckbc.h" 200 #if NPCKBC > 0 201 #include <dev/ic/i8042reg.h> 202 #include <dev/ic/pckbcvar.h> 203 #endif 204 205 #include "com.h" 206 #if NCOM > 0 207 #include <dev/ic/comreg.h> 208 #include <dev/ic/comvar.h> 209 #ifndef CONCOMADDR 210 #define CONCOMADDR 0x3f8 211 #endif 212 #endif 213 214 /* 215 * Define the default console speed for the board. This is generally 216 * what the firmware provided with the board defaults to. 217 */ 218 #ifndef CONSPEED 219 #define CONSPEED B115200 220 #endif 221 #ifndef CONMODE 222 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 223 #endif 224 225 int comcnspeed = CONSPEED; 226 int comcnmode = CONMODE; 227 228 #include "plcom.h" 229 #if (NPLCOM > 0) 230 #include <evbarm/dev/plcomreg.h> 231 #include <evbarm/dev/plcomvar.h> 232 233 #include <evbarm/ifpga/ifpgamem.h> 234 #include <evbarm/ifpga/ifpgareg.h> 235 #include <evbarm/ifpga/ifpgavar.h> 236 #endif 237 238 #ifndef CONSDEVNAME 239 #define CONSDEVNAME "plcom" 240 #endif 241 242 #ifndef PLCONSPEED 243 #define PLCONSPEED B38400 244 #endif 245 #ifndef PLCONMODE 246 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 247 #endif 248 #ifndef PLCOMCNUNIT 249 #define PLCOMCNUNIT -1 250 #endif 251 252 int plcomcnspeed = PLCONSPEED; 253 int plcomcnmode = PLCONMODE; 254 255 #if 0 256 extern struct consdev kcomcons; 257 static void kcomcnputc(dev_t, int); 258 #endif 259 260 /* 261 * void cpu_reboot(int howto, char *bootstr) 262 * 263 * Reboots the system 264 * 265 * Deal with any syncing, unmounting, dumping and shutdown hooks, 266 * then reset the CPU. 267 */ 268 void 269 cpu_reboot(int howto, char *bootstr) 270 { 271 272 /* 273 * If we are still cold then hit the air brakes 274 * and crash to earth fast 275 */ 276 if (cold) { 277 doshutdownhooks(); 278 printf("The operating system has halted.\n"); 279 printf("Please press any key to reboot.\n\n"); 280 cngetc(); 281 printf("rebooting...\n"); 282 ifpga_reset(); 283 /*NOTREACHED*/ 284 } 285 286 /* Disable console buffering */ 287 288 /* 289 * If RB_NOSYNC was not specified sync the discs. 290 * Note: Unless cold is set to 1 here, syslogd will die during the 291 * unmount. It looks like syslogd is getting woken up only to find 292 * that it cannot page part of the binary in as the filesystem has 293 * been unmounted. 294 */ 295 if (!(howto & RB_NOSYNC)) 296 bootsync(); 297 298 /* Say NO to interrupts */ 299 splhigh(); 300 301 /* Do a dump if requested. */ 302 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 303 dumpsys(); 304 305 /* Run any shutdown hooks */ 306 doshutdownhooks(); 307 308 /* Make sure IRQ's are disabled */ 309 IRQdisable; 310 311 if (howto & RB_HALT) { 312 printf("The operating system has halted.\n"); 313 printf("Please press any key to reboot.\n\n"); 314 cngetc(); 315 } 316 317 printf("rebooting...\n"); 318 ifpga_reset(); 319 /*NOTREACHED*/ 320 } 321 322 /* 323 * Mapping table for core kernel memory. This memory is mapped at init 324 * time with section mappings. 325 */ 326 struct l1_sec_map { 327 vaddr_t va; 328 vaddr_t pa; 329 vsize_t size; 330 vm_prot_t prot; 331 int cache; 332 } l1_sec_table[] = { 333 #if NPLCOM > 0 && defined(PLCONSOLE) 334 { 335 UART0_BOOT_BASE, 336 IFPGA_IO_BASE + IFPGA_UART0, 337 1024 * 1024, 338 VM_PROT_READ|VM_PROT_WRITE, 339 PTE_NOCACHE 340 }, 341 342 { 343 UART1_BOOT_BASE, 344 IFPGA_IO_BASE + IFPGA_UART1, 345 1024 * 1024, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE 348 }, 349 #endif 350 #if NPCI > 0 351 { 352 IFPGA_PCI_IO_VBASE, 353 IFPGA_PCI_IO_BASE, 354 IFPGA_PCI_IO_VSIZE, 355 VM_PROT_READ|VM_PROT_WRITE, 356 PTE_NOCACHE 357 }, 358 359 { 360 IFPGA_PCI_CONF_VBASE, 361 IFPGA_PCI_CONF_BASE, 362 IFPGA_PCI_CONF_VSIZE, 363 VM_PROT_READ|VM_PROT_WRITE, 364 PTE_NOCACHE }, 365 #endif 366 367 { 368 0, 369 0, 370 0, 371 0, 372 0 373 } 374 }; 375 376 /* 377 * u_int initarm(...) 378 * 379 * Initial entry point on startup. This gets called before main() is 380 * entered. 381 * It should be responsible for setting up everything that must be 382 * in place when main is called. 383 * This includes 384 * Taking a copy of the boot configuration structure. 385 * Initialising the physical console so characters can be printed. 386 * Setting up page tables for the kernel 387 * Relocating the kernel to the bottom of physical memory 388 */ 389 390 u_int 391 initarm(void *arg) 392 { 393 int loop; 394 int loop1; 395 u_int l1pagetable; 396 extern int etext asm ("_etext"); 397 extern int end asm ("_end"); 398 pv_addr_t kernel_l1pt; 399 paddr_t memstart; 400 psize_t memsize; 401 #if NPLCOM > 0 && defined(PLCONSOLE) 402 static struct bus_space plcom_bus_space; 403 #endif 404 405 /* 406 * Heads up ... Setup the CPU / MMU / TLB functions 407 */ 408 if (set_cpufuncs()) 409 panic("cpu not recognized!"); 410 411 #if NPLCOM > 0 && defined(PLCONSOLE) 412 /* 413 * Initialise the diagnostic serial console 414 * This allows a means of generating output during initarm(). 415 * Once all the memory map changes are complete we can call consinit() 416 * and not have to worry about things moving. 417 */ 418 419 if (PLCOMCNUNIT == 0) { 420 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 421 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 422 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 423 } else if (PLCOMCNUNIT == 1) { 424 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 425 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 426 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 427 } 428 #endif 429 430 #ifdef VERBOSE_INIT_ARM 431 /* Talk to the user */ 432 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 433 #endif 434 435 /* 436 * Ok we have the following memory map 437 * 438 * XXX NO WE DON'T 439 * 440 * virtual address == physical address apart from the areas: 441 * 0x00000000 -> 0x000fffff which is mapped to 442 * top 1MB of physical memory 443 * 0x00100000 -> 0x0fffffff which is mapped to 444 * physical addresses 0x00100000 -> 0x0fffffff 445 * 0x10000000 -> 0x1fffffff which is mapped to 446 * physical addresses 0x00000000 -> 0x0fffffff 447 * 0x20000000 -> 0xefffffff which is mapped to 448 * physical addresses 0x20000000 -> 0xefffffff 449 * 0xf0000000 -> 0xf03fffff which is mapped to 450 * physical addresses 0x00000000 -> 0x003fffff 451 * 452 * This means that the kernel is mapped suitably for continuing 453 * execution, all I/O is mapped 1:1 virtual to physical and 454 * physical memory is accessible. 455 * 456 * The initarm() has the responsibility for creating the kernel 457 * page tables. 458 * It must also set up various memory pointers that are used 459 * by pmap etc. 460 */ 461 462 /* 463 * Fetch the SDRAM start/size from the CM configuration registers. 464 */ 465 integrator_sdram_bounds(&memstart, &memsize); 466 467 #ifdef VERBOSE_INIT_ARM 468 printf("initarm: Configuring system ...\n"); 469 #endif 470 471 /* Fake bootconfig structure for the benefit of pmap.c */ 472 /* XXX must make the memory description h/w independent */ 473 bootconfig.dramblocks = 1; 474 bootconfig.dram[0].address = memstart; 475 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 476 477 /* 478 * Set up the variables that define the availablilty of 479 * physical memory. For now, we're going to set 480 * physical_freestart to 0x00200000 (where the kernel 481 * was loaded), and allocate the memory we need downwards. 482 * If we get too close to the L1 table that we set up, we 483 * will panic. We will update physical_freestart and 484 * physical_freeend later to reflect what pmap_bootstrap() 485 * wants to see. 486 * 487 * XXX pmap_bootstrap() needs an enema. 488 */ 489 physical_start = bootconfig.dram[0].address; 490 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 491 492 physical_freestart = 0x00009000UL; 493 physical_freeend = 0x00200000UL; 494 495 physmem = (physical_end - physical_start) / PAGE_SIZE; 496 497 #ifdef VERBOSE_INIT_ARM 498 /* Tell the user about the memory */ 499 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 500 physical_start, physical_end - 1); 501 #endif 502 503 /* 504 * Okay, the kernel starts 2MB in from the bottom of physical 505 * memory. We are going to allocate our bootstrap pages downwards 506 * from there. 507 * 508 * We need to allocate some fixed page tables to get the kernel 509 * going. We allocate one page directory and a number of page 510 * tables and store the physical addresses in the kernel_pt_table 511 * array. 512 * 513 * The kernel page directory must be on a 16K boundary. The page 514 * tables must be on 4K bounaries. What we do is allocate the 515 * page directory on the first 16K boundary that we encounter, and 516 * the page tables on 4K boundaries otherwise. Since we allocate 517 * at least 3 L2 page tables, we are guaranteed to encounter at 518 * least one 16K aligned region. 519 */ 520 521 #ifdef VERBOSE_INIT_ARM 522 printf("Allocating page tables\n"); 523 #endif 524 525 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 526 527 #ifdef VERBOSE_INIT_ARM 528 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 529 physical_freestart, free_pages, free_pages); 530 #endif 531 532 /* Define a macro to simplify memory allocation */ 533 #define valloc_pages(var, np) \ 534 alloc_pages((var).pv_pa, (np)); \ 535 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 536 537 #define alloc_pages(var, np) \ 538 physical_freeend -= ((np) * PAGE_SIZE); \ 539 if (physical_freeend < physical_freestart) \ 540 panic("initarm: out of memory"); \ 541 (var) = physical_freeend; \ 542 free_pages -= (np); \ 543 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 544 545 loop1 = 0; 546 kernel_l1pt.pv_pa = 0; 547 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 548 /* Are we 16KB aligned for an L1 ? */ 549 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 550 && kernel_l1pt.pv_pa == 0) { 551 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 552 } else { 553 valloc_pages(kernel_pt_table[loop1], 554 L2_TABLE_SIZE / PAGE_SIZE); 555 ++loop1; 556 } 557 } 558 559 /* This should never be able to happen but better confirm that. */ 560 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 561 panic("initarm: Failed to align the kernel page directory"); 562 563 /* 564 * Allocate a page for the system page mapped to V0x00000000 565 * This page will just contain the system vectors and can be 566 * shared by all processes. 567 */ 568 alloc_pages(systempage.pv_pa, 1); 569 570 /* Allocate stacks for all modes */ 571 valloc_pages(irqstack, IRQ_STACK_SIZE); 572 valloc_pages(abtstack, ABT_STACK_SIZE); 573 valloc_pages(undstack, UND_STACK_SIZE); 574 valloc_pages(kernelstack, UPAGES); 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 578 irqstack.pv_va); 579 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 580 abtstack.pv_va); 581 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 582 undstack.pv_va); 583 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 584 kernelstack.pv_va); 585 #endif 586 587 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 588 589 /* 590 * Ok we have allocated physical pages for the primary kernel 591 * page tables 592 */ 593 594 #ifdef VERBOSE_INIT_ARM 595 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 596 #endif 597 598 /* 599 * Now we start construction of the L1 page table 600 * We start by mapping the L2 page tables into the L1. 601 * This means that we can replace L1 mappings later on if necessary 602 */ 603 l1pagetable = kernel_l1pt.pv_pa; 604 605 /* Map the L2 pages tables in the L1 page table */ 606 pmap_link_l2pt(l1pagetable, 0x00000000, 607 &kernel_pt_table[KERNEL_PT_SYS]); 608 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 609 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 610 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 611 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 612 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 613 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 614 615 /* update the top of the kernel VM */ 616 pmap_curmaxkvaddr = 617 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 618 619 #ifdef VERBOSE_INIT_ARM 620 printf("Mapping kernel\n"); 621 #endif 622 623 /* Now we fill in the L2 pagetable for the kernel static code/data */ 624 { 625 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 626 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 627 u_int logical; 628 629 textsize = (textsize + PGOFSET) & ~PGOFSET; 630 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 631 632 logical = 0x00200000; /* offset of kernel in RAM */ 633 634 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 635 physical_start + logical, textsize, 636 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 637 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 638 physical_start + logical, totalsize - textsize, 639 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 640 } 641 642 #ifdef VERBOSE_INIT_ARM 643 printf("Constructing L2 page tables\n"); 644 #endif 645 646 /* Map the stack pages */ 647 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 648 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 649 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 650 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 651 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 652 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 653 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 654 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 656 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 657 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 658 659 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 660 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 661 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 662 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 663 } 664 665 /* Map the vector page. */ 666 #if 1 667 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 668 the cache-clean code there. */ 669 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 670 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 671 #else 672 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 #endif 675 /* Map the core memory needed before autoconfig */ 676 loop = 0; 677 while (l1_sec_table[loop].size) { 678 vm_size_t sz; 679 680 #ifdef VERBOSE_INIT_ARM 681 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 682 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 683 l1_sec_table[loop].va); 684 #endif 685 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 686 pmap_map_section(l1pagetable, 687 l1_sec_table[loop].va + sz, 688 l1_sec_table[loop].pa + sz, 689 l1_sec_table[loop].prot, 690 l1_sec_table[loop].cache); 691 ++loop; 692 } 693 694 /* 695 * Now we have the real page tables in place so we can switch to them. 696 * Once this is done we will be running with the REAL kernel page 697 * tables. 698 */ 699 700 /* 701 * Update the physical_freestart/physical_freeend/free_pages 702 * variables. 703 */ 704 { 705 physical_freestart = physical_start + 706 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 707 KERNEL_BASE); 708 physical_freeend = physical_end; 709 free_pages = 710 (physical_freeend - physical_freestart) / PAGE_SIZE; 711 } 712 713 /* Switch tables */ 714 #ifdef VERBOSE_INIT_ARM 715 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 716 physical_freestart, free_pages, free_pages); 717 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 718 #endif 719 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 720 setttb(kernel_l1pt.pv_pa); 721 cpu_tlb_flushID(); 722 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 723 724 /* 725 * Moved from cpu_startup() as data_abort_handler() references 726 * this during uvm init 727 */ 728 proc0paddr = (struct user *)kernelstack.pv_va; 729 lwp0.l_addr = proc0paddr; 730 731 #ifdef VERBOSE_INIT_ARM 732 printf("done!\n"); 733 #endif 734 735 #ifdef PLCONSOLE 736 /* 737 * The IFPGA registers have just moved. 738 * Detach the diagnostic serial port and reattach at the new address. 739 */ 740 plcomcndetach(); 741 #endif 742 743 /* 744 * XXX this should only be done in main() but it useful to 745 * have output earlier ... 746 */ 747 consinit(); 748 749 #ifdef VERBOSE_INIT_ARM 750 printf("bootstrap done.\n"); 751 #endif 752 753 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 754 755 /* 756 * Pages were allocated during the secondary bootstrap for the 757 * stacks for different CPU modes. 758 * We must now set the r13 registers in the different CPU modes to 759 * point to these stacks. 760 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 761 * of the stack memory. 762 */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("init subsystems: stacks "); 765 #endif 766 767 set_stackptr(PSR_IRQ32_MODE, 768 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 769 set_stackptr(PSR_ABT32_MODE, 770 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 771 set_stackptr(PSR_UND32_MODE, 772 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 773 774 /* 775 * Well we should set a data abort handler. 776 * Once things get going this will change as we will need a proper 777 * handler. 778 * Until then we will use a handler that just panics but tells us 779 * why. 780 * Initialisation of the vectors will just panic on a data abort. 781 * This just fills in a slighly better one. 782 */ 783 #ifdef VERBOSE_INIT_ARM 784 printf("vectors "); 785 #endif 786 data_abort_handler_address = (u_int)data_abort_handler; 787 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 788 undefined_handler_address = (u_int)undefinedinstruction_bounce; 789 790 /* Initialise the undefined instruction handlers */ 791 #ifdef VERBOSE_INIT_ARM 792 printf("undefined "); 793 #endif 794 undefined_init(); 795 796 /* Load memory into UVM. */ 797 #ifdef VERBOSE_INIT_ARM 798 printf("page "); 799 #endif 800 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 801 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 802 atop(physical_freestart), atop(physical_freeend), 803 VM_FREELIST_DEFAULT); 804 805 /* Boot strap pmap telling it where the kernel page table is */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("pmap "); 808 #endif 809 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 810 KERNEL_VM_BASE + KERNEL_VM_SIZE); 811 812 /* Setup the IRQ system */ 813 #ifdef VERBOSE_INIT_ARM 814 printf("irq "); 815 #endif 816 irq_init(); 817 818 #ifdef VERBOSE_INIT_ARM 819 printf("done.\n"); 820 #endif 821 822 #ifdef IPKDB 823 /* Initialise ipkdb */ 824 ipkdb_init(); 825 if (boothowto & RB_KDB) 826 ipkdb_connect(0); 827 #endif 828 829 #if NKSYMS || defined(DDB) || defined(LKM) 830 /* Firmware doesn't load symbols. */ 831 ksyms_init(0, NULL, NULL); 832 #endif 833 834 #ifdef DDB 835 db_machine_init(); 836 if (boothowto & RB_KDB) 837 Debugger(); 838 #endif 839 840 /* We return the new stack pointer address */ 841 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 842 } 843 844 void 845 consinit(void) 846 { 847 static int consinit_called = 0; 848 #if NPLCOM > 0 && defined(PLCONSOLE) 849 static struct bus_space plcom_bus_space; 850 #endif 851 #if 0 852 char *console = CONSDEVNAME; 853 #endif 854 855 if (consinit_called != 0) 856 return; 857 858 consinit_called = 1; 859 860 #if NPLCOM > 0 && defined(PLCONSOLE) 861 if (PLCOMCNUNIT == 0) { 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 } else if (PLCOMCNUNIT == 1) { 869 ifpga_create_io_bs_tag(&plcom_bus_space, 870 (void*)UART0_BOOT_BASE); 871 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 872 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 873 panic("can't init serial console"); 874 return; 875 } 876 #endif 877 #if (NCOM > 0) 878 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 879 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 880 panic("can't init serial console @%x", CONCOMADDR); 881 return; 882 #endif 883 panic("No serial console configured"); 884 } 885 886 static void 887 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 888 { 889 volatile unsigned long *cm_sdram 890 = (volatile unsigned long *)0x10000020; 891 892 *memstart = 0; 893 894 switch ((*cm_sdram >> 2) & 0x7) 895 { 896 case 0: 897 *memsize = 16 * 1024 * 1024; 898 break; 899 case 1: 900 *memsize = 32 * 1024 * 1024; 901 break; 902 case 2: 903 *memsize = 64 * 1024 * 1024; 904 break; 905 case 3: 906 *memsize = 128 * 1024 * 1024; 907 break; 908 case 4: 909 *memsize = 256 * 1024 * 1024; 910 break; 911 default: 912 printf("CM_SDRAM retuns unknown value, using 16M\n"); 913 *memsize = 16 * 1024 * 1024; 914 break; 915 } 916 } 917
Indexes created Mon Sep 29 21:09:56 GMT 2025