integrator_machdep.c revision 1.33
1 /* $NetBSD: integrator_machdep.c,v 1.33 2003/05/03 00:39:22 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001,2002 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997,1998 Mark Brinicombe. 34 * Copyright (c) 1997,1998 Causality Limited. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Mark Brinicombe 48 * for the NetBSD Project. 49 * 4. The name of the company nor the name of the author may be used to 50 * endorse or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * Machine dependant functions for kernel setup for integrator board 66 * 67 * Created : 24/11/97 68 */ 69 70 #include "opt_ddb.h" 71 #include "opt_pmap_debug.h" 72 73 #include <sys/param.h> 74 #include <sys/device.h> 75 #include <sys/systm.h> 76 #include <sys/kernel.h> 77 #include <sys/exec.h> 78 #include <sys/proc.h> 79 #include <sys/msgbuf.h> 80 #include <sys/reboot.h> 81 #include <sys/termios.h> 82 #include <sys/ksyms.h> 83 84 #include <uvm/uvm_extern.h> 85 86 #include <dev/cons.h> 87 88 #include <machine/db_machdep.h> 89 #include <ddb/db_sym.h> 90 #include <ddb/db_extern.h> 91 92 #include <machine/bootconfig.h> 93 #include <machine/bus.h> 94 #include <machine/cpu.h> 95 #include <machine/frame.h> 96 #include <machine/intr.h> 97 #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */ 98 #include <arm/undefined.h> 99 100 #include <arm/arm32/machdep.h> 101 102 #include <evbarm/integrator/integrator_boot.h> 103 104 #include "opt_ipkdb.h" 105 #include "pci.h" 106 #include "ksyms.h" 107 108 void ifpga_reset(void) __attribute__((noreturn)); 109 /* 110 * Address to call from cpu_reset() to reset the machine. 111 * This is machine architecture dependant as it varies depending 112 * on where the ROM appears when you turn the MMU off. 113 */ 114 115 u_int cpu_reset_address = (u_int) ifpga_reset; 116 117 /* Define various stack sizes in pages */ 118 #define IRQ_STACK_SIZE 1 119 #define ABT_STACK_SIZE 1 120 #ifdef IPKDB 121 #define UND_STACK_SIZE 2 122 #else 123 #define UND_STACK_SIZE 1 124 #endif 125 126 BootConfig bootconfig; /* Boot config storage */ 127 char *boot_args = NULL; 128 char *boot_file = NULL; 129 130 vm_offset_t physical_start; 131 vm_offset_t physical_freestart; 132 vm_offset_t physical_freeend; 133 vm_offset_t physical_end; 134 u_int free_pages; 135 vm_offset_t pagetables_start; 136 int physmem = 0; 137 138 /*int debug_flags;*/ 139 #ifndef PMAP_STATIC_L1S 140 int max_processes = 64; /* Default number */ 141 #endif /* !PMAP_STATIC_L1S */ 142 143 /* Physical and virtual addresses for some global pages */ 144 pv_addr_t systempage; 145 pv_addr_t irqstack; 146 pv_addr_t undstack; 147 pv_addr_t abtstack; 148 pv_addr_t kernelstack; 149 150 vm_offset_t msgbufphys; 151 152 extern u_int data_abort_handler_address; 153 extern u_int prefetch_abort_handler_address; 154 extern u_int undefined_handler_address; 155 156 #ifdef PMAP_DEBUG 157 extern int pmap_debug_level; 158 #endif 159 160 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 161 162 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 163 #define KERNEL_PT_KERNEL_NUM 2 164 /* L2 tables for mapping kernel VM */ 165 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 166 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 167 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 168 169 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 170 171 struct user *proc0paddr; 172 173 /* Prototypes */ 174 175 static void integrator_sdram_bounds (paddr_t *, psize_t *); 176 177 void consinit(void); 178 179 /* A load of console goo. */ 180 #include "vga.h" 181 #if NVGA > 0 182 #include <dev/ic/mc6845reg.h> 183 #include <dev/ic/pcdisplayvar.h> 184 #include <dev/ic/vgareg.h> 185 #include <dev/ic/vgavar.h> 186 #endif 187 188 #include "pckbc.h" 189 #if NPCKBC > 0 190 #include <dev/ic/i8042reg.h> 191 #include <dev/ic/pckbcvar.h> 192 #endif 193 194 #include "com.h" 195 #if NCOM > 0 196 #include <dev/ic/comreg.h> 197 #include <dev/ic/comvar.h> 198 #ifndef CONCOMADDR 199 #define CONCOMADDR 0x3f8 200 #endif 201 #endif 202 203 /* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207 #ifndef CONSPEED 208 #define CONSPEED B115200 209 #endif 210 #ifndef CONMODE 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 212 #endif 213 214 int comcnspeed = CONSPEED; 215 int comcnmode = CONMODE; 216 217 #include "plcom.h" 218 #if (NPLCOM > 0) 219 #include <evbarm/dev/plcomreg.h> 220 #include <evbarm/dev/plcomvar.h> 221 222 #include <evbarm/ifpga/ifpgamem.h> 223 #include <evbarm/ifpga/ifpgareg.h> 224 #include <evbarm/ifpga/ifpgavar.h> 225 #endif 226 227 #ifndef CONSDEVNAME 228 #define CONSDEVNAME "plcom" 229 #endif 230 231 #ifndef PLCONSPEED 232 #define PLCONSPEED B38400 233 #endif 234 #ifndef PLCONMODE 235 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 236 #endif 237 #ifndef PLCOMCNUNIT 238 #define PLCOMCNUNIT -1 239 #endif 240 241 int plcomcnspeed = PLCONSPEED; 242 int plcomcnmode = PLCONMODE; 243 244 #if 0 245 extern struct consdev kcomcons; 246 static void kcomcnputc(dev_t, int); 247 #endif 248 249 /* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257 void 258 cpu_reboot(int howto, char *bootstr) 259 { 260 #ifdef DIAGNOSTIC 261 /* info */ 262 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 263 #endif 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 #ifndef ARM32_PMAP_NEW 393 pv_addr_t kernel_ptpt; 394 #endif 395 paddr_t memstart; 396 psize_t memsize; 397 #if NPLCOM > 0 && defined(PLCONSOLE) 398 static struct bus_space plcom_bus_space; 399 #endif 400 401 /* 402 * Heads up ... Setup the CPU / MMU / TLB functions 403 */ 404 if (set_cpufuncs()) 405 panic("cpu not recognized!"); 406 407 #if NPLCOM > 0 && defined(PLCONSOLE) 408 /* 409 * Initialise the diagnostic serial console 410 * This allows a means of generating output during initarm(). 411 * Once all the memory map changes are complete we can call consinit() 412 * and not have to worry about things moving. 413 */ 414 415 if (PLCOMCNUNIT == 0) { 416 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 417 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 418 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 419 } else if (PLCOMCNUNIT == 1) { 420 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 421 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 422 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 423 } 424 #endif 425 426 /* Talk to the user */ 427 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 428 429 /* 430 * Ok we have the following memory map 431 * 432 * XXX NO WE DON'T 433 * 434 * virtual address == physical address apart from the areas: 435 * 0x00000000 -> 0x000fffff which is mapped to 436 * top 1MB of physical memory 437 * 0x00100000 -> 0x0fffffff which is mapped to 438 * physical addresses 0x00100000 -> 0x0fffffff 439 * 0x10000000 -> 0x1fffffff which is mapped to 440 * physical addresses 0x00000000 -> 0x0fffffff 441 * 0x20000000 -> 0xefffffff which is mapped to 442 * physical addresses 0x20000000 -> 0xefffffff 443 * 0xf0000000 -> 0xf03fffff which is mapped to 444 * physical addresses 0x00000000 -> 0x003fffff 445 * 446 * This means that the kernel is mapped suitably for continuing 447 * execution, all I/O is mapped 1:1 virtual to physical and 448 * physical memory is accessible. 449 * 450 * The initarm() has the responsibility for creating the kernel 451 * page tables. 452 * It must also set up various memory pointers that are used 453 * by pmap etc. 454 */ 455 456 /* 457 * Fetch the SDRAM start/size from the CM configuration registers. 458 */ 459 integrator_sdram_bounds(&memstart, &memsize); 460 461 printf("initarm: Configuring system ...\n"); 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 /* Tell the user about the memory */ 490 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 491 physical_start, physical_end - 1); 492 493 /* 494 * Okay, the kernel starts 2MB in from the bottom of physical 495 * memory. We are going to allocate our bootstrap pages downwards 496 * from there. 497 * 498 * We need to allocate some fixed page tables to get the kernel 499 * going. We allocate one page directory and a number of page 500 * tables and store the physical addresses in the kernel_pt_table 501 * array. 502 * 503 * The kernel page directory must be on a 16K boundary. The page 504 * tables must be on 4K bounaries. What we do is allocate the 505 * page directory on the first 16K boundary that we encounter, and 506 * the page tables on 4K boundaries otherwise. Since we allocate 507 * at least 3 L2 page tables, we are guaranteed to encounter at 508 * least one 16K aligned region. 509 */ 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("Allocating page tables\n"); 513 #endif 514 515 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 516 517 #ifdef VERBOSE_INIT_ARM 518 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 519 physical_freestart, free_pages, free_pages); 520 #endif 521 522 /* Define a macro to simplify memory allocation */ 523 #define valloc_pages(var, np) \ 524 alloc_pages((var).pv_pa, (np)); \ 525 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 526 527 #define alloc_pages(var, np) \ 528 physical_freeend -= ((np) * PAGE_SIZE); \ 529 if (physical_freeend < physical_freestart) \ 530 panic("initarm: out of memory"); \ 531 (var) = physical_freeend; \ 532 free_pages -= (np); \ 533 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 534 535 loop1 = 0; 536 kernel_l1pt.pv_pa = 0; 537 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 538 /* Are we 16KB aligned for an L1 ? */ 539 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 540 && kernel_l1pt.pv_pa == 0) { 541 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 542 } else { 543 #ifdef ARM32_PMAP_NEW 544 valloc_pages(kernel_pt_table[loop1], 545 L2_TABLE_SIZE / PAGE_SIZE); 546 #else 547 alloc_pages(kernel_pt_table[loop1].pv_pa, 548 L2_TABLE_SIZE / PAGE_SIZE); 549 kernel_pt_table[loop1].pv_va = 550 kernel_pt_table[loop1].pv_pa; 551 #endif 552 ++loop1; 553 } 554 } 555 556 /* This should never be able to happen but better confirm that. */ 557 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 558 panic("initarm: Failed to align the kernel page directory"); 559 560 /* 561 * Allocate a page for the system page mapped to V0x00000000 562 * This page will just contain the system vectors and can be 563 * shared by all processes. 564 */ 565 alloc_pages(systempage.pv_pa, 1); 566 567 #ifndef ARM32_PMAP_NEW 568 /* Allocate a page for the page table to map kernel page tables. */ 569 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / PAGE_SIZE); 570 #endif 571 572 /* Allocate stacks for all modes */ 573 valloc_pages(irqstack, IRQ_STACK_SIZE); 574 valloc_pages(abtstack, ABT_STACK_SIZE); 575 valloc_pages(undstack, UND_STACK_SIZE); 576 valloc_pages(kernelstack, UPAGES); 577 578 #ifdef VERBOSE_INIT_ARM 579 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 580 irqstack.pv_va); 581 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 582 abtstack.pv_va); 583 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 584 undstack.pv_va); 585 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 586 kernelstack.pv_va); 587 #endif 588 589 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 590 591 /* 592 * Ok we have allocated physical pages for the primary kernel 593 * page tables 594 */ 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 598 #endif 599 600 /* 601 * Now we start construction of the L1 page table 602 * We start by mapping the L2 page tables into the L1. 603 * This means that we can replace L1 mappings later on if necessary 604 */ 605 l1pagetable = kernel_l1pt.pv_pa; 606 607 /* Map the L2 pages tables in the L1 page table */ 608 pmap_link_l2pt(l1pagetable, 0x00000000, 609 &kernel_pt_table[KERNEL_PT_SYS]); 610 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 611 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 612 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 613 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 614 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 615 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 616 #ifndef ARM32_PMAP_NEW 617 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 618 #endif 619 620 /* update the top of the kernel VM */ 621 pmap_curmaxkvaddr = 622 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 623 624 #ifdef VERBOSE_INIT_ARM 625 printf("Mapping kernel\n"); 626 #endif 627 628 /* Now we fill in the L2 pagetable for the kernel static code/data */ 629 { 630 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 631 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 632 u_int logical; 633 634 textsize = (textsize + PGOFSET) & ~PGOFSET; 635 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 636 637 logical = 0x00200000; /* offset of kernel in RAM */ 638 639 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 640 physical_start + logical, textsize, 641 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 642 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 643 physical_start + logical, totalsize - textsize, 644 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 } 646 647 #ifdef VERBOSE_INIT_ARM 648 printf("Constructing L2 page tables\n"); 649 #endif 650 651 /* Map the stack pages */ 652 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 653 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 654 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 655 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 656 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 657 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 658 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 659 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 660 661 #ifndef ARM32_PMAP_NEW 662 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 663 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 #else 665 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 666 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 667 668 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 669 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 670 kernel_pt_table[loop].pv_va, L2_TABLE_SIZE, 671 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 672 } 673 #endif 674 675 #ifndef ARM32_PMAP_NEW 676 /* Map the page table that maps the kernel pages */ 677 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 678 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 679 680 /* 681 * Map entries in the page table used to map PTE's 682 * Basically every kernel page table gets mapped here 683 */ 684 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 685 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) { 686 pmap_map_entry(l1pagetable, 687 PTE_BASE + ((KERNEL_BASE + 688 (loop * 0x00400000)) >> (PGSHIFT-2)), 689 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 690 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 691 } 692 pmap_map_entry(l1pagetable, 693 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 694 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 695 pmap_map_entry(l1pagetable, 696 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 697 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 698 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 700 pmap_map_entry(l1pagetable, 701 PTE_BASE + ((KERNEL_VM_BASE + 702 (loop * 0x00400000)) >> (PGSHIFT-2)), 703 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 704 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 705 #endif 706 707 /* Map the vector page. */ 708 #if 1 709 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 710 the cache-clean code there. */ 711 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 712 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 713 #else 714 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 715 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 716 #endif 717 /* Map the core memory needed before autoconfig */ 718 loop = 0; 719 while (l1_sec_table[loop].size) { 720 vm_size_t sz; 721 722 #ifdef VERBOSE_INIT_ARM 723 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 724 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 725 l1_sec_table[loop].va); 726 #endif 727 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 728 pmap_map_section(l1pagetable, 729 l1_sec_table[loop].va + sz, 730 l1_sec_table[loop].pa + sz, 731 l1_sec_table[loop].prot, 732 l1_sec_table[loop].cache); 733 ++loop; 734 } 735 736 /* 737 * Now we have the real page tables in place so we can switch to them. 738 * Once this is done we will be running with the REAL kernel page 739 * tables. 740 */ 741 742 /* 743 * Update the physical_freestart/physical_freeend/free_pages 744 * variables. 745 */ 746 { 747 physical_freestart = physical_start + 748 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 749 KERNEL_BASE); 750 physical_freeend = physical_end; 751 free_pages = 752 (physical_freeend - physical_freestart) / PAGE_SIZE; 753 } 754 755 /* Switch tables */ 756 #ifdef VERBOSE_INIT_ARM 757 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 758 physical_freestart, free_pages, free_pages); 759 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 760 #endif 761 #ifdef ARM32_PMAP_NEW 762 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 763 #endif 764 setttb(kernel_l1pt.pv_pa); 765 cpu_tlb_flushID(); 766 #ifdef ARM32_PMAP_NEW 767 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 768 769 /* 770 * Moved from cpu_startup() as data_abort_handler() references 771 * this during uvm init 772 */ 773 proc0paddr = (struct user *)kernelstack.pv_va; 774 lwp0.l_addr = proc0paddr; 775 #endif 776 777 #ifdef VERBOSE_INIT_ARM 778 printf("done!\n"); 779 #endif 780 781 #ifdef PLCONSOLE 782 /* 783 * The IFPGA registers have just moved. 784 * Detach the diagnostic serial port and reattach at the new address. 785 */ 786 plcomcndetach(); 787 #endif 788 789 /* 790 * XXX this should only be done in main() but it useful to 791 * have output earlier ... 792 */ 793 consinit(); 794 795 #ifdef VERBOSE_INIT_ARM 796 printf("bootstrap done.\n"); 797 #endif 798 799 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 800 801 /* 802 * Pages were allocated during the secondary bootstrap for the 803 * stacks for different CPU modes. 804 * We must now set the r13 registers in the different CPU modes to 805 * point to these stacks. 806 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 807 * of the stack memory. 808 */ 809 printf("init subsystems: stacks "); 810 811 set_stackptr(PSR_IRQ32_MODE, 812 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 813 set_stackptr(PSR_ABT32_MODE, 814 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 815 set_stackptr(PSR_UND32_MODE, 816 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 817 818 /* 819 * Well we should set a data abort handler. 820 * Once things get going this will change as we will need a proper 821 * handler. 822 * Until then we will use a handler that just panics but tells us 823 * why. 824 * Initialisation of the vectors will just panic on a data abort. 825 * This just fills in a slighly better one. 826 */ 827 printf("vectors "); 828 data_abort_handler_address = (u_int)data_abort_handler; 829 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 830 undefined_handler_address = (u_int)undefinedinstruction_bounce; 831 832 /* Initialise the undefined instruction handlers */ 833 printf("undefined "); 834 undefined_init(); 835 836 /* Load memory into UVM. */ 837 printf("page "); 838 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 839 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 840 atop(physical_freestart), atop(physical_freeend), 841 VM_FREELIST_DEFAULT); 842 843 /* Boot strap pmap telling it where the kernel page table is */ 844 printf("pmap "); 845 #ifdef ARM32_PMAP_NEW 846 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va); 847 #else 848 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 849 #endif 850 851 /* Setup the IRQ system */ 852 printf("irq "); 853 irq_init(); 854 855 printf("done.\n"); 856 857 #ifdef IPKDB 858 /* Initialise ipkdb */ 859 ipkdb_init(); 860 if (boothowto & RB_KDB) 861 ipkdb_connect(0); 862 #endif 863 864 #if NKSYMS || defined(DDB) || defined(LKM) 865 /* Firmware doesn't load symbols. */ 866 ksyms_init(0, NULL, NULL); 867 #endif 868 869 #ifdef DDB 870 db_machine_init(); 871 if (boothowto & RB_KDB) 872 Debugger(); 873 #endif 874 875 /* We return the new stack pointer address */ 876 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 877 } 878 879 void 880 consinit(void) 881 { 882 static int consinit_called = 0; 883 #if NPLCOM > 0 && defined(PLCONSOLE) 884 static struct bus_space plcom_bus_space; 885 #endif 886 #if 0 887 char *console = CONSDEVNAME; 888 #endif 889 890 if (consinit_called != 0) 891 return; 892 893 consinit_called = 1; 894 895 #if NPLCOM > 0 && defined(PLCONSOLE) 896 if (PLCOMCNUNIT == 0) { 897 ifpga_create_io_bs_tag(&plcom_bus_space, 898 (void*)UART0_BOOT_BASE); 899 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 900 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 901 panic("can't init serial console"); 902 return; 903 } else if (PLCOMCNUNIT == 1) { 904 ifpga_create_io_bs_tag(&plcom_bus_space, 905 (void*)UART0_BOOT_BASE); 906 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 907 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 908 panic("can't init serial console"); 909 return; 910 } 911 #endif 912 #if (NCOM > 0) 913 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 914 COM_FREQ, comcnmode)) 915 panic("can't init serial console @%x", CONCOMADDR); 916 return; 917 #endif 918 panic("No serial console configured"); 919 } 920 921 static void 922 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 923 { 924 volatile unsigned long *cm_sdram 925 = (volatile unsigned long *)0x10000020; 926 927 *memstart = 0; 928 929 switch ((*cm_sdram >> 2) & 0x7) 930 { 931 case 0: 932 *memsize = 16 * 1024 * 1024; 933 break; 934 case 1: 935 *memsize = 32 * 1024 * 1024; 936 break; 937 case 2: 938 *memsize = 64 * 1024 * 1024; 939 break; 940 case 3: 941 *memsize = 128 * 1024 * 1024; 942 break; 943 case 4: 944 *memsize = 256 * 1024 * 1024; 945 break; 946 default: 947 printf("CM_SDRAM retuns unknown value, using 16M\n"); 948 *memsize = 16 * 1024 * 1024; 949 break; 950 } 951 } 952
Indexes created Tue Sep 30 17:09:57 GMT 2025