integrator_machdep.c revision 1.42
1 /* $NetBSD: integrator_machdep.c,v 1.42 2003/06/15 17:45:24 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 /* Statically mapped devices. */ 323 static const struct pmap_devmap integrator_devmap[] = { 324 #if NPLCOM > 0 && defined(PLCONSOLE) 325 { 326 UART0_BOOT_BASE, 327 IFPGA_IO_BASE + IFPGA_UART0, 328 1024 * 1024, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE 331 }, 332 333 { 334 UART1_BOOT_BASE, 335 IFPGA_IO_BASE + IFPGA_UART1, 336 1024 * 1024, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE 339 }, 340 #endif 341 #if NPCI > 0 342 { 343 IFPGA_PCI_IO_VBASE, 344 IFPGA_PCI_IO_BASE, 345 IFPGA_PCI_IO_VSIZE, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE 348 }, 349 350 { 351 IFPGA_PCI_CONF_VBASE, 352 IFPGA_PCI_CONF_BASE, 353 IFPGA_PCI_CONF_VSIZE, 354 VM_PROT_READ|VM_PROT_WRITE, 355 PTE_NOCACHE 356 }, 357 #endif 358 359 { 360 0, 361 0, 362 0, 363 0, 364 0 365 } 366 }; 367 368 /* 369 * u_int initarm(...) 370 * 371 * Initial entry point on startup. This gets called before main() is 372 * entered. 373 * It should be responsible for setting up everything that must be 374 * in place when main is called. 375 * This includes 376 * Taking a copy of the boot configuration structure. 377 * Initialising the physical console so characters can be printed. 378 * Setting up page tables for the kernel 379 * Relocating the kernel to the bottom of physical memory 380 */ 381 382 u_int 383 initarm(void *arg) 384 { 385 int loop; 386 int loop1; 387 u_int l1pagetable; 388 extern int etext asm ("_etext"); 389 extern int end asm ("_end"); 390 pv_addr_t kernel_l1pt; 391 paddr_t memstart; 392 psize_t memsize; 393 #if NPLCOM > 0 && defined(PLCONSOLE) 394 static struct bus_space plcom_bus_space; 395 #endif 396 397 /* 398 * Heads up ... Setup the CPU / MMU / TLB functions 399 */ 400 if (set_cpufuncs()) 401 panic("cpu not recognized!"); 402 403 #if NPLCOM > 0 && defined(PLCONSOLE) 404 /* 405 * Initialise the diagnostic serial console 406 * This allows a means of generating output during initarm(). 407 * Once all the memory map changes are complete we can call consinit() 408 * and not have to worry about things moving. 409 */ 410 411 if (PLCOMCNUNIT == 0) { 412 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 413 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 414 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 415 } else if (PLCOMCNUNIT == 1) { 416 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 417 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 418 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 419 } 420 #endif 421 422 #ifdef VERBOSE_INIT_ARM 423 /* Talk to the user */ 424 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 425 #endif 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 #ifdef VERBOSE_INIT_ARM 460 printf("initarm: Configuring system ...\n"); 461 #endif 462 463 /* Fake bootconfig structure for the benefit of pmap.c */ 464 /* XXX must make the memory description h/w independent */ 465 bootconfig.dramblocks = 1; 466 bootconfig.dram[0].address = memstart; 467 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 468 469 /* 470 * Set up the variables that define the availablilty of 471 * physical memory. For now, we're going to set 472 * physical_freestart to 0x00200000 (where the kernel 473 * was loaded), and allocate the memory we need downwards. 474 * If we get too close to the L1 table that we set up, we 475 * will panic. We will update physical_freestart and 476 * physical_freeend later to reflect what pmap_bootstrap() 477 * wants to see. 478 * 479 * XXX pmap_bootstrap() needs an enema. 480 */ 481 physical_start = bootconfig.dram[0].address; 482 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 483 484 physical_freestart = 0x00009000UL; 485 physical_freeend = 0x00200000UL; 486 487 physmem = (physical_end - physical_start) / PAGE_SIZE; 488 489 #ifdef VERBOSE_INIT_ARM 490 /* Tell the user about the memory */ 491 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 492 physical_start, physical_end - 1); 493 #endif 494 495 /* 496 * Okay, the kernel starts 2MB in from the bottom of physical 497 * memory. We are going to allocate our bootstrap pages downwards 498 * from there. 499 * 500 * We need to allocate some fixed page tables to get the kernel 501 * going. We allocate one page directory and a number of page 502 * tables and store the physical addresses in the kernel_pt_table 503 * array. 504 * 505 * The kernel page directory must be on a 16K boundary. The page 506 * tables must be on 4K bounaries. What we do is allocate the 507 * page directory on the first 16K boundary that we encounter, and 508 * the page tables on 4K boundaries otherwise. Since we allocate 509 * at least 3 L2 page tables, we are guaranteed to encounter at 510 * least one 16K aligned region. 511 */ 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("Allocating page tables\n"); 515 #endif 516 517 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 518 519 #ifdef VERBOSE_INIT_ARM 520 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 521 physical_freestart, free_pages, free_pages); 522 #endif 523 524 /* Define a macro to simplify memory allocation */ 525 #define valloc_pages(var, np) \ 526 alloc_pages((var).pv_pa, (np)); \ 527 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 528 529 #define alloc_pages(var, np) \ 530 physical_freeend -= ((np) * PAGE_SIZE); \ 531 if (physical_freeend < physical_freestart) \ 532 panic("initarm: out of memory"); \ 533 (var) = physical_freeend; \ 534 free_pages -= (np); \ 535 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 536 537 loop1 = 0; 538 kernel_l1pt.pv_pa = 0; 539 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 540 /* Are we 16KB aligned for an L1 ? */ 541 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 542 && kernel_l1pt.pv_pa == 0) { 543 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 544 } else { 545 valloc_pages(kernel_pt_table[loop1], 546 L2_TABLE_SIZE / PAGE_SIZE); 547 ++loop1; 548 } 549 } 550 551 /* This should never be able to happen but better confirm that. */ 552 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 553 panic("initarm: Failed to align the kernel page directory"); 554 555 /* 556 * Allocate a page for the system page mapped to V0x00000000 557 * This page will just contain the system vectors and can be 558 * shared by all processes. 559 */ 560 alloc_pages(systempage.pv_pa, 1); 561 562 /* Allocate stacks for all modes */ 563 valloc_pages(irqstack, IRQ_STACK_SIZE); 564 valloc_pages(abtstack, ABT_STACK_SIZE); 565 valloc_pages(undstack, UND_STACK_SIZE); 566 valloc_pages(kernelstack, UPAGES); 567 568 #ifdef VERBOSE_INIT_ARM 569 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 570 irqstack.pv_va); 571 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 572 abtstack.pv_va); 573 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 574 undstack.pv_va); 575 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 576 kernelstack.pv_va); 577 #endif 578 579 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 580 581 /* 582 * Ok we have allocated physical pages for the primary kernel 583 * page tables 584 */ 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 588 #endif 589 590 /* 591 * Now we start construction of the L1 page table 592 * We start by mapping the L2 page tables into the L1. 593 * This means that we can replace L1 mappings later on if necessary 594 */ 595 l1pagetable = kernel_l1pt.pv_pa; 596 597 /* Map the L2 pages tables in the L1 page table */ 598 pmap_link_l2pt(l1pagetable, 0x00000000, 599 &kernel_pt_table[KERNEL_PT_SYS]); 600 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 601 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 602 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 603 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 604 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 605 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 606 607 /* update the top of the kernel VM */ 608 pmap_curmaxkvaddr = 609 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 610 611 #ifdef VERBOSE_INIT_ARM 612 printf("Mapping kernel\n"); 613 #endif 614 615 /* Now we fill in the L2 pagetable for the kernel static code/data */ 616 { 617 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 618 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 619 u_int logical; 620 621 textsize = (textsize + PGOFSET) & ~PGOFSET; 622 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 623 624 logical = 0x00200000; /* offset of kernel in RAM */ 625 626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 627 physical_start + logical, textsize, 628 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 630 physical_start + logical, totalsize - textsize, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 } 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("Constructing L2 page tables\n"); 636 #endif 637 638 /* Map the stack pages */ 639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 642 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 643 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 644 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 646 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 648 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 649 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 650 651 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 652 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 653 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 655 } 656 657 /* Map the vector page. */ 658 #if 1 659 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 660 the cache-clean code there. */ 661 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 662 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 663 #else 664 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 665 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 666 #endif 667 668 /* Map the statically mapped devices. */ 669 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 670 671 /* 672 * Now we have the real page tables in place so we can switch to them. 673 * Once this is done we will be running with the REAL kernel page 674 * tables. 675 */ 676 677 /* 678 * Update the physical_freestart/physical_freeend/free_pages 679 * variables. 680 */ 681 { 682 physical_freestart = physical_start + 683 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 684 KERNEL_BASE); 685 physical_freeend = physical_end; 686 free_pages = 687 (physical_freeend - physical_freestart) / PAGE_SIZE; 688 } 689 690 /* Switch tables */ 691 #ifdef VERBOSE_INIT_ARM 692 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 693 physical_freestart, free_pages, free_pages); 694 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 695 #endif 696 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 697 setttb(kernel_l1pt.pv_pa); 698 cpu_tlb_flushID(); 699 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 700 701 /* 702 * Moved from cpu_startup() as data_abort_handler() references 703 * this during uvm init 704 */ 705 proc0paddr = (struct user *)kernelstack.pv_va; 706 lwp0.l_addr = proc0paddr; 707 708 #ifdef VERBOSE_INIT_ARM 709 printf("done!\n"); 710 #endif 711 712 #ifdef PLCONSOLE 713 /* 714 * The IFPGA registers have just moved. 715 * Detach the diagnostic serial port and reattach at the new address. 716 */ 717 plcomcndetach(); 718 #endif 719 720 /* 721 * XXX this should only be done in main() but it useful to 722 * have output earlier ... 723 */ 724 consinit(); 725 726 #ifdef VERBOSE_INIT_ARM 727 printf("bootstrap done.\n"); 728 #endif 729 730 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 731 732 /* 733 * Pages were allocated during the secondary bootstrap for the 734 * stacks for different CPU modes. 735 * We must now set the r13 registers in the different CPU modes to 736 * point to these stacks. 737 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 738 * of the stack memory. 739 */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("init subsystems: stacks "); 742 #endif 743 744 set_stackptr(PSR_IRQ32_MODE, 745 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 746 set_stackptr(PSR_ABT32_MODE, 747 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 748 set_stackptr(PSR_UND32_MODE, 749 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 750 751 /* 752 * Well we should set a data abort handler. 753 * Once things get going this will change as we will need a proper 754 * handler. 755 * Until then we will use a handler that just panics but tells us 756 * why. 757 * Initialisation of the vectors will just panic on a data abort. 758 * This just fills in a slighly better one. 759 */ 760 #ifdef VERBOSE_INIT_ARM 761 printf("vectors "); 762 #endif 763 data_abort_handler_address = (u_int)data_abort_handler; 764 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 765 undefined_handler_address = (u_int)undefinedinstruction_bounce; 766 767 /* Initialise the undefined instruction handlers */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("undefined "); 770 #endif 771 undefined_init(); 772 773 /* Load memory into UVM. */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("page "); 776 #endif 777 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 778 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 779 atop(physical_freestart), atop(physical_freeend), 780 VM_FREELIST_DEFAULT); 781 782 /* Boot strap pmap telling it where the kernel page table is */ 783 #ifdef VERBOSE_INIT_ARM 784 printf("pmap "); 785 #endif 786 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 787 KERNEL_VM_BASE + KERNEL_VM_SIZE); 788 789 /* Setup the IRQ system */ 790 #ifdef VERBOSE_INIT_ARM 791 printf("irq "); 792 #endif 793 irq_init(); 794 795 #ifdef VERBOSE_INIT_ARM 796 printf("done.\n"); 797 #endif 798 799 #ifdef IPKDB 800 /* Initialise ipkdb */ 801 ipkdb_init(); 802 if (boothowto & RB_KDB) 803 ipkdb_connect(0); 804 #endif 805 806 #if NKSYMS || defined(DDB) || defined(LKM) 807 /* Firmware doesn't load symbols. */ 808 ksyms_init(0, NULL, NULL); 809 #endif 810 811 #ifdef DDB 812 db_machine_init(); 813 if (boothowto & RB_KDB) 814 Debugger(); 815 #endif 816 817 /* We return the new stack pointer address */ 818 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 819 } 820 821 void 822 consinit(void) 823 { 824 static int consinit_called = 0; 825 #if NPLCOM > 0 && defined(PLCONSOLE) 826 static struct bus_space plcom_bus_space; 827 #endif 828 #if 0 829 char *console = CONSDEVNAME; 830 #endif 831 832 if (consinit_called != 0) 833 return; 834 835 consinit_called = 1; 836 837 #if NPLCOM > 0 && defined(PLCONSOLE) 838 if (PLCOMCNUNIT == 0) { 839 ifpga_create_io_bs_tag(&plcom_bus_space, 840 (void*)UART0_BOOT_BASE); 841 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 842 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 843 panic("can't init serial console"); 844 return; 845 } else if (PLCOMCNUNIT == 1) { 846 ifpga_create_io_bs_tag(&plcom_bus_space, 847 (void*)UART0_BOOT_BASE); 848 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 849 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 850 panic("can't init serial console"); 851 return; 852 } 853 #endif 854 #if (NCOM > 0) 855 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 856 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 857 panic("can't init serial console @%x", CONCOMADDR); 858 return; 859 #endif 860 panic("No serial console configured"); 861 } 862 863 static void 864 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 865 { 866 volatile unsigned long *cm_sdram 867 = (volatile unsigned long *)0x10000020; 868 869 *memstart = 0; 870 871 switch ((*cm_sdram >> 2) & 0x7) 872 { 873 case 0: 874 *memsize = 16 * 1024 * 1024; 875 break; 876 case 1: 877 *memsize = 32 * 1024 * 1024; 878 break; 879 case 2: 880 *memsize = 64 * 1024 * 1024; 881 break; 882 case 3: 883 *memsize = 128 * 1024 * 1024; 884 break; 885 case 4: 886 *memsize = 256 * 1024 * 1024; 887 break; 888 default: 889 printf("CM_SDRAM retuns unknown value, using 16M\n"); 890 *memsize = 16 * 1024 * 1024; 891 break; 892 } 893 } 894
Indexes created Tue Sep 30 11:09:46 GMT 2025