integrator_machdep.c revision 1.31
1 /* $NetBSD: integrator_machdep.c,v 1.31 2003/04/02 03:49:25 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 83 #include <uvm/uvm_extern.h> 84 85 #include <dev/cons.h> 86 87 #include <machine/db_machdep.h> 88 #include <ddb/db_sym.h> 89 #include <ddb/db_extern.h> 90 91 #include <machine/bootconfig.h> 92 #include <machine/bus.h> 93 #include <machine/cpu.h> 94 #include <machine/frame.h> 95 #include <machine/intr.h> 96 #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */ 97 #include <arm/undefined.h> 98 99 #include <arm/arm32/machdep.h> 100 101 #include <evbarm/integrator/integrator_boot.h> 102 103 #include "opt_ipkdb.h" 104 #include "pci.h" 105 106 void ifpga_reset(void) __attribute__((noreturn)); 107 /* 108 * Address to call from cpu_reset() to reset the machine. 109 * This is machine architecture dependant as it varies depending 110 * on where the ROM appears when you turn the MMU off. 111 */ 112 113 u_int cpu_reset_address = (u_int) ifpga_reset; 114 115 /* Define various stack sizes in pages */ 116 #define IRQ_STACK_SIZE 1 117 #define ABT_STACK_SIZE 1 118 #ifdef IPKDB 119 #define UND_STACK_SIZE 2 120 #else 121 #define UND_STACK_SIZE 1 122 #endif 123 124 BootConfig bootconfig; /* Boot config storage */ 125 char *boot_args = NULL; 126 char *boot_file = NULL; 127 128 vm_offset_t physical_start; 129 vm_offset_t physical_freestart; 130 vm_offset_t physical_freeend; 131 vm_offset_t physical_end; 132 u_int free_pages; 133 vm_offset_t pagetables_start; 134 int physmem = 0; 135 136 /*int debug_flags;*/ 137 #ifndef PMAP_STATIC_L1S 138 int max_processes = 64; /* Default number */ 139 #endif /* !PMAP_STATIC_L1S */ 140 141 /* Physical and virtual addresses for some global pages */ 142 pv_addr_t systempage; 143 pv_addr_t irqstack; 144 pv_addr_t undstack; 145 pv_addr_t abtstack; 146 pv_addr_t kernelstack; 147 148 vm_offset_t msgbufphys; 149 150 extern u_int data_abort_handler_address; 151 extern u_int prefetch_abort_handler_address; 152 extern u_int undefined_handler_address; 153 154 #ifdef PMAP_DEBUG 155 extern int pmap_debug_level; 156 #endif 157 158 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 159 160 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 161 #define KERNEL_PT_KERNEL_NUM 2 162 /* L2 tables for mapping kernel VM */ 163 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 164 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 165 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 166 167 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 168 169 struct user *proc0paddr; 170 171 /* Prototypes */ 172 173 static void integrator_sdram_bounds (paddr_t *, psize_t *); 174 175 void consinit(void); 176 177 /* A load of console goo. */ 178 #include "vga.h" 179 #if NVGA > 0 180 #include <dev/ic/mc6845reg.h> 181 #include <dev/ic/pcdisplayvar.h> 182 #include <dev/ic/vgareg.h> 183 #include <dev/ic/vgavar.h> 184 #endif 185 186 #include "pckbc.h" 187 #if NPCKBC > 0 188 #include <dev/ic/i8042reg.h> 189 #include <dev/ic/pckbcvar.h> 190 #endif 191 192 #include "com.h" 193 #if NCOM > 0 194 #include <dev/ic/comreg.h> 195 #include <dev/ic/comvar.h> 196 #ifndef CONCOMADDR 197 #define CONCOMADDR 0x3f8 198 #endif 199 #endif 200 201 /* 202 * Define the default console speed for the board. This is generally 203 * what the firmware provided with the board defaults to. 204 */ 205 #ifndef CONSPEED 206 #define CONSPEED B115200 207 #endif 208 #ifndef CONMODE 209 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 210 #endif 211 212 int comcnspeed = CONSPEED; 213 int comcnmode = CONMODE; 214 215 #include "plcom.h" 216 #if (NPLCOM > 0) 217 #include <evbarm/dev/plcomreg.h> 218 #include <evbarm/dev/plcomvar.h> 219 220 #include <evbarm/ifpga/ifpgamem.h> 221 #include <evbarm/ifpga/ifpgareg.h> 222 #include <evbarm/ifpga/ifpgavar.h> 223 #endif 224 225 #ifndef CONSDEVNAME 226 #define CONSDEVNAME "plcom" 227 #endif 228 229 #ifndef PLCONSPEED 230 #define PLCONSPEED B38400 231 #endif 232 #ifndef PLCONMODE 233 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 234 #endif 235 #ifndef PLCOMCNUNIT 236 #define PLCOMCNUNIT -1 237 #endif 238 239 int plcomcnspeed = PLCONSPEED; 240 int plcomcnmode = PLCONMODE; 241 242 #if 0 243 extern struct consdev kcomcons; 244 static void kcomcnputc(dev_t, int); 245 #endif 246 247 /* 248 * void cpu_reboot(int howto, char *bootstr) 249 * 250 * Reboots the system 251 * 252 * Deal with any syncing, unmounting, dumping and shutdown hooks, 253 * then reset the CPU. 254 */ 255 void 256 cpu_reboot(int howto, char *bootstr) 257 { 258 #ifdef DIAGNOSTIC 259 /* info */ 260 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 261 #endif 262 263 /* 264 * If we are still cold then hit the air brakes 265 * and crash to earth fast 266 */ 267 if (cold) { 268 doshutdownhooks(); 269 printf("The operating system has halted.\n"); 270 printf("Please press any key to reboot.\n\n"); 271 cngetc(); 272 printf("rebooting...\n"); 273 ifpga_reset(); 274 /*NOTREACHED*/ 275 } 276 277 /* Disable console buffering */ 278 279 /* 280 * If RB_NOSYNC was not specified sync the discs. 281 * Note: Unless cold is set to 1 here, syslogd will die during the 282 * unmount. It looks like syslogd is getting woken up only to find 283 * that it cannot page part of the binary in as the filesystem has 284 * been unmounted. 285 */ 286 if (!(howto & RB_NOSYNC)) 287 bootsync(); 288 289 /* Say NO to interrupts */ 290 splhigh(); 291 292 /* Do a dump if requested. */ 293 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 294 dumpsys(); 295 296 /* Run any shutdown hooks */ 297 doshutdownhooks(); 298 299 /* Make sure IRQ's are disabled */ 300 IRQdisable; 301 302 if (howto & RB_HALT) { 303 printf("The operating system has halted.\n"); 304 printf("Please press any key to reboot.\n\n"); 305 cngetc(); 306 } 307 308 printf("rebooting...\n"); 309 ifpga_reset(); 310 /*NOTREACHED*/ 311 } 312 313 /* 314 * Mapping table for core kernel memory. This memory is mapped at init 315 * time with section mappings. 316 */ 317 struct l1_sec_map { 318 vaddr_t va; 319 vaddr_t pa; 320 vsize_t size; 321 vm_prot_t prot; 322 int cache; 323 } l1_sec_table[] = { 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 #endif 357 358 { 359 0, 360 0, 361 0, 362 0, 363 0 364 } 365 }; 366 367 /* 368 * u_int initarm(...) 369 * 370 * Initial entry point on startup. This gets called before main() is 371 * entered. 372 * It should be responsible for setting up everything that must be 373 * in place when main is called. 374 * This includes 375 * Taking a copy of the boot configuration structure. 376 * Initialising the physical console so characters can be printed. 377 * Setting up page tables for the kernel 378 * Relocating the kernel to the bottom of physical memory 379 */ 380 381 u_int 382 initarm(void *arg) 383 { 384 int loop; 385 int loop1; 386 u_int l1pagetable; 387 extern int etext asm ("_etext"); 388 extern int end asm ("_end"); 389 pv_addr_t kernel_l1pt; 390 pv_addr_t kernel_ptpt; 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 /* Talk to the user */ 423 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 424 425 /* 426 * Ok we have the following memory map 427 * 428 * XXX NO WE DON'T 429 * 430 * virtual address == physical address apart from the areas: 431 * 0x00000000 -> 0x000fffff which is mapped to 432 * top 1MB of physical memory 433 * 0x00100000 -> 0x0fffffff which is mapped to 434 * physical addresses 0x00100000 -> 0x0fffffff 435 * 0x10000000 -> 0x1fffffff which is mapped to 436 * physical addresses 0x00000000 -> 0x0fffffff 437 * 0x20000000 -> 0xefffffff which is mapped to 438 * physical addresses 0x20000000 -> 0xefffffff 439 * 0xf0000000 -> 0xf03fffff which is mapped to 440 * physical addresses 0x00000000 -> 0x003fffff 441 * 442 * This means that the kernel is mapped suitably for continuing 443 * execution, all I/O is mapped 1:1 virtual to physical and 444 * physical memory is accessible. 445 * 446 * The initarm() has the responsibility for creating the kernel 447 * page tables. 448 * It must also set up various memory pointers that are used 449 * by pmap etc. 450 */ 451 452 /* 453 * Fetch the SDRAM start/size from the CM configuration registers. 454 */ 455 integrator_sdram_bounds(&memstart, &memsize); 456 457 printf("initarm: Configuring system ...\n"); 458 459 /* Fake bootconfig structure for the benefit of pmap.c */ 460 /* XXX must make the memory description h/w independent */ 461 bootconfig.dramblocks = 1; 462 bootconfig.dram[0].address = memstart; 463 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 464 465 /* 466 * Set up the variables that define the availablilty of 467 * physical memory. For now, we're going to set 468 * physical_freestart to 0x00200000 (where the kernel 469 * was loaded), and allocate the memory we need downwards. 470 * If we get too close to the L1 table that we set up, we 471 * will panic. We will update physical_freestart and 472 * physical_freeend later to reflect what pmap_bootstrap() 473 * wants to see. 474 * 475 * XXX pmap_bootstrap() needs an enema. 476 */ 477 physical_start = bootconfig.dram[0].address; 478 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 479 480 physical_freestart = 0x00009000UL; 481 physical_freeend = 0x00200000UL; 482 483 physmem = (physical_end - physical_start) / PAGE_SIZE; 484 485 /* Tell the user about the memory */ 486 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 487 physical_start, physical_end - 1); 488 489 /* 490 * Okay, the kernel starts 2MB in from the bottom of physical 491 * memory. We are going to allocate our bootstrap pages downwards 492 * from there. 493 * 494 * We need to allocate some fixed page tables to get the kernel 495 * going. We allocate one page directory and a number of page 496 * tables and store the physical addresses in the kernel_pt_table 497 * array. 498 * 499 * The kernel page directory must be on a 16K boundary. The page 500 * tables must be on 4K bounaries. What we do is allocate the 501 * page directory on the first 16K boundary that we encounter, and 502 * the page tables on 4K boundaries otherwise. Since we allocate 503 * at least 3 L2 page tables, we are guaranteed to encounter at 504 * least one 16K aligned region. 505 */ 506 507 #ifdef VERBOSE_INIT_ARM 508 printf("Allocating page tables\n"); 509 #endif 510 511 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 512 513 #ifdef VERBOSE_INIT_ARM 514 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 515 physical_freestart, free_pages, free_pages); 516 #endif 517 518 /* Define a macro to simplify memory allocation */ 519 #define valloc_pages(var, np) \ 520 alloc_pages((var).pv_pa, (np)); \ 521 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 522 523 #define alloc_pages(var, np) \ 524 physical_freeend -= ((np) * PAGE_SIZE); \ 525 if (physical_freeend < physical_freestart) \ 526 panic("initarm: out of memory"); \ 527 (var) = physical_freeend; \ 528 free_pages -= (np); \ 529 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 530 531 loop1 = 0; 532 kernel_l1pt.pv_pa = 0; 533 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 534 /* Are we 16KB aligned for an L1 ? */ 535 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 536 && kernel_l1pt.pv_pa == 0) { 537 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 538 } else { 539 alloc_pages(kernel_pt_table[loop1].pv_pa, 540 L2_TABLE_SIZE / PAGE_SIZE); 541 kernel_pt_table[loop1].pv_va = 542 kernel_pt_table[loop1].pv_pa; 543 ++loop1; 544 } 545 } 546 547 /* This should never be able to happen but better confirm that. */ 548 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 549 panic("initarm: Failed to align the kernel page directory"); 550 551 /* 552 * Allocate a page for the system page mapped to V0x00000000 553 * This page will just contain the system vectors and can be 554 * shared by all processes. 555 */ 556 alloc_pages(systempage.pv_pa, 1); 557 558 /* Allocate a page for the page table to map kernel page tables. */ 559 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / PAGE_SIZE); 560 561 /* Allocate stacks for all modes */ 562 valloc_pages(irqstack, IRQ_STACK_SIZE); 563 valloc_pages(abtstack, ABT_STACK_SIZE); 564 valloc_pages(undstack, UND_STACK_SIZE); 565 valloc_pages(kernelstack, UPAGES); 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 569 irqstack.pv_va); 570 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 571 abtstack.pv_va); 572 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 573 undstack.pv_va); 574 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 575 kernelstack.pv_va); 576 #endif 577 578 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 579 580 /* 581 * Ok we have allocated physical pages for the primary kernel 582 * page tables 583 */ 584 585 #ifdef VERBOSE_INIT_ARM 586 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 587 #endif 588 589 /* 590 * Now we start construction of the L1 page table 591 * We start by mapping the L2 page tables into the L1. 592 * This means that we can replace L1 mappings later on if necessary 593 */ 594 l1pagetable = kernel_l1pt.pv_pa; 595 596 /* Map the L2 pages tables in the L1 page table */ 597 pmap_link_l2pt(l1pagetable, 0x00000000, 598 &kernel_pt_table[KERNEL_PT_SYS]); 599 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 600 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 601 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 602 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 603 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 604 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 605 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 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_CACHE); 650 651 /* Map the page table that maps the kernel pages */ 652 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 653 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 654 655 /* 656 * Map entries in the page table used to map PTE's 657 * Basically every kernel page table gets mapped here 658 */ 659 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 660 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) { 661 pmap_map_entry(l1pagetable, 662 PTE_BASE + ((KERNEL_BASE + 663 (loop * 0x00400000)) >> (PGSHIFT-2)), 664 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 665 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 666 } 667 pmap_map_entry(l1pagetable, 668 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 669 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 670 pmap_map_entry(l1pagetable, 671 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 672 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 675 pmap_map_entry(l1pagetable, 676 PTE_BASE + ((KERNEL_VM_BASE + 677 (loop * 0x00400000)) >> (PGSHIFT-2)), 678 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 679 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 681 /* Map the vector page. */ 682 #if 1 683 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 684 the cache-clean code there. */ 685 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 686 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 687 #else 688 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 689 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 690 #endif 691 /* Map the core memory needed before autoconfig */ 692 loop = 0; 693 while (l1_sec_table[loop].size) { 694 vm_size_t sz; 695 696 #ifdef VERBOSE_INIT_ARM 697 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 698 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 699 l1_sec_table[loop].va); 700 #endif 701 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 702 pmap_map_section(l1pagetable, 703 l1_sec_table[loop].va + sz, 704 l1_sec_table[loop].pa + sz, 705 l1_sec_table[loop].prot, 706 l1_sec_table[loop].cache); 707 ++loop; 708 } 709 710 /* 711 * Now we have the real page tables in place so we can switch to them. 712 * Once this is done we will be running with the REAL kernel page 713 * tables. 714 */ 715 716 /* 717 * Update the physical_freestart/physical_freeend/free_pages 718 * variables. 719 */ 720 { 721 physical_freestart = physical_start + 722 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 723 KERNEL_BASE); 724 physical_freeend = physical_end; 725 free_pages = 726 (physical_freeend - physical_freestart) / PAGE_SIZE; 727 } 728 729 /* Switch tables */ 730 #ifdef VERBOSE_INIT_ARM 731 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 732 physical_freestart, free_pages, free_pages); 733 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 734 #endif 735 setttb(kernel_l1pt.pv_pa); 736 cpu_tlb_flushID(); 737 738 #ifdef VERBOSE_INIT_ARM 739 printf("done!\n"); 740 #endif 741 742 #ifdef PLCONSOLE 743 /* 744 * The IFPGA registers have just moved. 745 * Detach the diagnostic serial port and reattach at the new address. 746 */ 747 plcomcndetach(); 748 #endif 749 750 /* 751 * XXX this should only be done in main() but it useful to 752 * have output earlier ... 753 */ 754 consinit(); 755 756 #ifdef VERBOSE_INIT_ARM 757 printf("bootstrap done.\n"); 758 #endif 759 760 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 761 762 /* 763 * Pages were allocated during the secondary bootstrap for the 764 * stacks for different CPU modes. 765 * We must now set the r13 registers in the different CPU modes to 766 * point to these stacks. 767 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 768 * of the stack memory. 769 */ 770 printf("init subsystems: stacks "); 771 772 set_stackptr(PSR_IRQ32_MODE, 773 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 774 set_stackptr(PSR_ABT32_MODE, 775 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 776 set_stackptr(PSR_UND32_MODE, 777 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 778 779 /* 780 * Well we should set a data abort handler. 781 * Once things get going this will change as we will need a proper 782 * handler. 783 * Until then we will use a handler that just panics but tells us 784 * why. 785 * Initialisation of the vectors will just panic on a data abort. 786 * This just fills in a slighly better one. 787 */ 788 printf("vectors "); 789 data_abort_handler_address = (u_int)data_abort_handler; 790 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 791 undefined_handler_address = (u_int)undefinedinstruction_bounce; 792 793 /* Initialise the undefined instruction handlers */ 794 printf("undefined "); 795 undefined_init(); 796 797 /* Load memory into UVM. */ 798 printf("page "); 799 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 800 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 801 atop(physical_freestart), atop(physical_freeend), 802 VM_FREELIST_DEFAULT); 803 804 /* Boot strap pmap telling it where the kernel page table is */ 805 printf("pmap "); 806 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 807 808 /* Setup the IRQ system */ 809 printf("irq "); 810 irq_init(); 811 812 printf("done.\n"); 813 814 #ifdef IPKDB 815 /* Initialise ipkdb */ 816 ipkdb_init(); 817 if (boothowto & RB_KDB) 818 ipkdb_connect(0); 819 #endif 820 821 #ifdef DDB 822 db_machine_init(); 823 824 /* Firmware doesn't load symbols. */ 825 ddb_init(0, NULL, NULL); 826 827 if (boothowto & RB_KDB) 828 Debugger(); 829 #endif 830 831 /* We return the new stack pointer address */ 832 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 833 } 834 835 void 836 consinit(void) 837 { 838 static int consinit_called = 0; 839 #if NPLCOM > 0 && defined(PLCONSOLE) 840 static struct bus_space plcom_bus_space; 841 #endif 842 #if 0 843 char *console = CONSDEVNAME; 844 #endif 845 846 if (consinit_called != 0) 847 return; 848 849 consinit_called = 1; 850 851 #if NPLCOM > 0 && defined(PLCONSOLE) 852 if (PLCOMCNUNIT == 0) { 853 ifpga_create_io_bs_tag(&plcom_bus_space, 854 (void*)UART0_BOOT_BASE); 855 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 856 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 857 panic("can't init serial console"); 858 return; 859 } else if (PLCOMCNUNIT == 1) { 860 ifpga_create_io_bs_tag(&plcom_bus_space, 861 (void*)UART0_BOOT_BASE); 862 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 863 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 864 panic("can't init serial console"); 865 return; 866 } 867 #endif 868 #if (NCOM > 0) 869 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 870 COM_FREQ, comcnmode)) 871 panic("can't init serial console @%x", CONCOMADDR); 872 return; 873 #endif 874 panic("No serial console configured"); 875 } 876 877 static void 878 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 879 { 880 volatile unsigned long *cm_sdram 881 = (volatile unsigned long *)0x10000020; 882 883 *memstart = 0; 884 885 switch ((*cm_sdram >> 2) & 0x7) 886 { 887 case 0: 888 *memsize = 16 * 1024 * 1024; 889 break; 890 case 1: 891 *memsize = 32 * 1024 * 1024; 892 break; 893 case 2: 894 *memsize = 64 * 1024 * 1024; 895 break; 896 case 3: 897 *memsize = 128 * 1024 * 1024; 898 break; 899 case 4: 900 *memsize = 256 * 1024 * 1024; 901 break; 902 default: 903 printf("CM_SDRAM retuns unknown value, using 16M\n"); 904 *memsize = 16 * 1024 * 1024; 905 break; 906 } 907 } 908
Indexes created Tue Sep 30 17:09:57 GMT 2025