eb7500atx_machdep.c revision 1.3.4.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.3.4.1 2006/09/09 02:36:41 rpaulo Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2002 Reinoud Zandijk. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * RiscBSD kernel project 39 * 40 * machdep.c 41 * 42 * Machine dependant functions for kernel setup 43 * 44 * This file still needs a lot of work 45 * 46 * Created : 17/09/94 47 * Updated for yet another new bootloader 28/12/02 48 */ 49 50 #include "opt_ddb.h" 51 #include "opt_pmap_debug.h" 52 #include "vidcvideo.h" 53 #include "pckbc.h" 54 55 #include <sys/param.h> 56 57 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.3.4.1 2006/09/09 02:36:41 rpaulo Exp $"); 58 59 #include <sys/systm.h> 60 #include <sys/kernel.h> 61 #include <sys/reboot.h> 62 #include <sys/proc.h> 63 #include <sys/msgbuf.h> 64 #include <sys/exec.h> 65 #include <sys/ksyms.h> 66 67 #include <dev/cons.h> 68 69 #include <machine/db_machdep.h> 70 #include <ddb/db_sym.h> 71 #include <ddb/db_extern.h> 72 73 #include <uvm/uvm.h> 74 75 #include <machine/signal.h> 76 #include <machine/frame.h> 77 #include <machine/bootconfig.h> 78 #include <machine/cpu.h> 79 #include <machine/io.h> 80 #include <machine/intr.h> 81 #include <arm/cpuconf.h> 82 #include <arm/arm32/katelib.h> 83 #include <arm/arm32/machdep.h> 84 #include <arm/undefined.h> 85 #include <machine/rtc.h> 86 #include <machine/bus.h> 87 88 #include <arm/iomd/vidc.h> 89 #include <arm/iomd/iomdreg.h> 90 #include <arm/iomd/iomdvar.h> 91 92 #include <arm/iomd/vidcvideo.h> 93 94 #include <sys/device.h> 95 #include <dev/ic/pckbcvar.h> 96 97 #include <dev/i2c/i2cvar.h> 98 #include <dev/i2c/pcf8583var.h> 99 #include <arm/iomd/iomdiicvar.h> 100 101 /* static i2c_tag_t acorn32_i2c_tag;*/ 102 103 #include "opt_ipkdb.h" 104 #include "ksyms.h" 105 106 /* Kernel text starts at the base of the kernel address space. */ 107 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 108 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 109 110 /* 111 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 112 * Fixed mappings exist from 0xf6000000 - 0xffffffff 113 */ 114 #define KERNEL_VM_SIZE 0x05000000 115 116 /* 117 * Address to call from cpu_reset() to reset the machine. 118 * This is machine architecture dependant as it varies depending 119 * on where the ROM appears when you turn the MMU off. 120 */ 121 u_int cpu_reset_address = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */ 122 123 124 #define VERBOSE_INIT_ARM 125 126 127 /* Define various stack sizes in pages */ 128 #define IRQ_STACK_SIZE 1 129 #define ABT_STACK_SIZE 1 130 #ifdef IPKDB 131 #define UND_STACK_SIZE 2 132 #else 133 #define UND_STACK_SIZE 1 134 #endif 135 136 137 struct bootconfig bootconfig; /* Boot config storage */ 138 videomemory_t videomemory; /* Video memory descriptor */ 139 140 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 141 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 142 143 extern int *vidc_base; 144 extern u_int32_t iomd_base; 145 extern struct bus_space iomd_bs_tag; 146 147 paddr_t physical_start; 148 paddr_t physical_freestart; 149 paddr_t physical_freeend; 150 paddr_t physical_end; 151 paddr_t dma_range_begin; 152 paddr_t dma_range_end; 153 154 u_int free_pages; 155 int physmem = 0; 156 paddr_t memoryblock_end; 157 158 #ifndef PMAP_STATIC_L1S 159 int max_processes = 64; /* Default number */ 160 #endif /* !PMAP_STATIC_L1S */ 161 162 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 163 164 /* Physical and virtual addresses for some global pages */ 165 pv_addr_t systempage; 166 pv_addr_t irqstack; 167 pv_addr_t undstack; 168 pv_addr_t abtstack; 169 pv_addr_t kernelstack; 170 171 paddr_t msgbufphys; 172 173 extern u_int data_abort_handler_address; 174 extern u_int prefetch_abort_handler_address; 175 extern u_int undefined_handler_address; 176 177 #ifdef PMAP_DEBUG 178 extern int pmap_debug_level; 179 #endif /* PMAP_DEBUG */ 180 181 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 182 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 183 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 184 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 185 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 186 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 187 188 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 189 190 struct user *proc0paddr; 191 192 #ifdef CPU_SA110 193 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 194 static vaddr_t sa110_cc_base; 195 #endif /* CPU_SA110 */ 196 197 /* Prototypes */ 198 void physcon_display_base(u_int); 199 extern void consinit(void); 200 201 void data_abort_handler(trapframe_t *); 202 void prefetch_abort_handler(trapframe_t *); 203 void undefinedinstruction_bounce(trapframe_t *frame); 204 205 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 206 static void process_kernel_args(void); 207 208 extern void dump_spl_masks(void); 209 210 void rpc_sa110_cc_setup(void); 211 212 extern void parse_mi_bootargs(char *args); 213 void parse_rpc_bootargs(char *args); 214 215 extern void dumpsys(void); 216 217 218 # define console_flush() /* empty */ 219 220 221 #define panic2(a) do { \ 222 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 223 consinit(); \ 224 panic a; \ 225 } while (/* CONSTCOND */ 0) 226 227 /* 228 * void cpu_reboot(int howto, char *bootstr) 229 * 230 * Reboots the system 231 * 232 * Deal with any syncing, unmounting, dumping and shutdown hooks, 233 * then reset the CPU. 234 */ 235 236 /* NOTE: These variables will be removed, well some of them */ 237 238 extern u_int spl_mask; 239 extern u_int current_mask; 240 241 void 242 cpu_reboot(int howto, char *bootstr) 243 { 244 245 #ifdef DIAGNOSTIC 246 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 247 248 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 249 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 250 irqmasks[IPL_VM]); 251 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 252 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 253 254 /* dump_spl_masks(); */ 255 #endif /* DIAGNOSTIC */ 256 257 /* 258 * If we are still cold then hit the air brakes 259 * and crash to earth fast 260 */ 261 if (cold) { 262 doshutdownhooks(); 263 printf("Halted while still in the ICE age.\n"); 264 printf("The operating system has halted.\n"); 265 printf("Please press any key to reboot.\n\n"); 266 cngetc(); 267 printf("rebooting...\n"); 268 cpu_reset(); 269 /*NOTREACHED*/ 270 } 271 272 /* Disable console buffering */ 273 cnpollc(1); 274 275 /* 276 * If RB_NOSYNC was not specified sync the discs. 277 * Note: Unless cold is set to 1 here, syslogd will die during 278 * the unmount. It looks like syslogd is getting woken up 279 * only to find that it cannot page part of the binary in as 280 * the filesystem has been unmounted. 281 */ 282 if (!(howto & RB_NOSYNC)) 283 bootsync(); 284 285 /* Say NO to interrupts */ 286 splhigh(); 287 288 /* Do a dump if requested. */ 289 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 290 dumpsys(); 291 292 /* 293 * Auto reboot overload protection 294 * 295 * This code stops the kernel entering an endless loop of reboot 296 * - panic cycles. This will have the effect of stopping further 297 * reboots after it has rebooted 8 times after panics. A clean 298 * halt or reboot will reset the counter. 299 */ 300 301 /* Run any shutdown hooks */ 302 doshutdownhooks(); 303 304 /* Make sure IRQ's are disabled */ 305 IRQdisable; 306 307 if (howto & RB_HALT) { 308 printf("The operating system has halted.\n"); 309 printf("Please press any key to reboot.\n\n"); 310 cngetc(); 311 } 312 313 printf("rebooting...\n"); 314 cpu_reset(); 315 /*NOTREACHED*/ 316 } 317 318 319 /* 320 * u_int initarm(BootConfig *bootconf) 321 * 322 * Initial entry point on startup. This gets called before main() is 323 * entered. 324 * It should be responsible for setting up everything that must be 325 * in place when main is called. 326 * This includes 327 * Taking a copy of the boot configuration structure. 328 * Initialising the physical console so characters can be printed. 329 * Setting up page tables for the kernel 330 * Relocating the kernel to the bottom of physical memory 331 */ 332 333 /* 334 * this part is completely rewritten for the new bootloader ... It features 335 * a flat memory map with a mapping comparable to the EBSA arm32 machine 336 * to boost the portability and likeness of the code 337 */ 338 339 /* 340 * Mapping table for core kernel memory. This memory is mapped at init 341 * time with section mappings. 342 * 343 * XXX One big assumption in the current architecture seems that the kernel is 344 * XXX supposed to be mapped into bootconfig.dram[0]. 345 */ 346 347 #define ONE_MB 0x100000 348 349 struct l1_sec_map { 350 vaddr_t va; 351 paddr_t pa; 352 vsize_t size; 353 vm_prot_t prot; 354 int cache; 355 } l1_sec_table[] = { 356 /* Map 1Mb section for VIDC20 */ 357 { VIDC_BASE, VIDC_HW_BASE, 358 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 359 PTE_NOCACHE }, 360 361 /* Map 1Mb section from IOMD */ 362 { IOMD_BASE, IOMD_HW_BASE, 363 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 364 PTE_NOCACHE }, 365 366 /* Map 1Mb of COMBO (and module space) */ 367 { IO_BASE, IO_HW_BASE, 368 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 369 PTE_NOCACHE }, 370 { 0, 0, 0, 0, 0 } 371 }; 372 373 374 static void 375 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 376 { 377 /* check for bootconfig v2+ structure */ 378 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 379 /* v2+ cleaned up structure found */ 380 *bootconf = *raw_bootconf; 381 return; 382 } else { 383 panic2(("Internal error: no valid bootconfig block found")); 384 } 385 } 386 387 388 u_int 389 initarm(void *cookie) 390 { 391 struct bootconfig *raw_bootconf = cookie; 392 int loop; 393 int loop1; 394 u_int logical; 395 u_int kerneldatasize; 396 u_int l1pagetable; 397 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 398 pv_addr_t kernel_l1pt = { {0} }; 399 400 /* 401 * Heads up ... Setup the CPU / MMU / TLB functions 402 */ 403 set_cpufuncs(); 404 405 /* canonicalise the boot configuration structure to alow versioning */ 406 canonicalise_bootconfig(&bootconfig, raw_bootconf); 407 booted_kernel = bootconfig.kernelname; 408 409 /* if the wscons interface is used, switch off VERBOSE booting :( */ 410 #if NVIDCVIDEO>0 411 # undef VERBOSE_INIT_ARM 412 # undef PMAP_DEBUG 413 #endif 414 415 /* 416 * Initialise the video memory descriptor 417 * 418 * Note: all references to the video memory virtual/physical address 419 * should go via this structure. 420 */ 421 422 /* Hardwire it on the place the bootloader tells us */ 423 videomemory.vidm_vbase = bootconfig.display_start; 424 videomemory.vidm_pbase = bootconfig.display_phys; 425 videomemory.vidm_size = bootconfig.display_size; 426 if (bootconfig.vram[0].pages) 427 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 428 else 429 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 430 vidc_base = (int *) VIDC_HW_BASE; 431 iomd_base = IOMD_HW_BASE; 432 433 /* 434 * Initialise the physical console 435 * This is done in main() but for the moment we do it here so that 436 * we can use printf in initarm() before main() has been called. 437 * only for `vidcconsole!' ... not wscons 438 */ 439 #if NVIDCVIDEO == 0 440 consinit(); 441 #endif 442 443 /* 444 * Initialise the diagnostic serial console 445 * This allows a means of generating output during initarm(). 446 * Once all the memory map changes are complete we can call consinit() 447 * and not have to worry about things moving. 448 */ 449 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 450 /* XXX snif .... i am still not able to this */ 451 452 /* 453 * We have the following memory map (derived from EBSA) 454 * 455 * virtual address == physical address apart from the areas: 456 * 0x00000000 -> 0x000fffff which is mapped to 457 * top 1MB of physical memory 458 * 0xf0000000 -> 0xf0ffffff wich is mapped to 459 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 460 * 461 * This means that the kernel is mapped suitably for continuing 462 * execution, all I/O is mapped 1:1 virtual to physical and 463 * physical memory is accessible. 464 * 465 * The initarm() has the responsibility for creating the kernel 466 * page tables. 467 * It must also set up various memory pointers that are used 468 * by pmap etc. 469 */ 470 471 /* START OF REAL NEW STUFF */ 472 473 /* Check to make sure the page size is correct */ 474 if (PAGE_SIZE != bootconfig.pagesize) 475 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 476 bootconfig.pagesize, PAGE_SIZE)); 477 478 /* process arguments */ 479 process_kernel_args(); 480 481 482 /* 483 * Now set up the page tables for the kernel ... this part is copied 484 * in a (modified?) way from the EBSA machine port.... 485 */ 486 487 #ifdef VERBOSE_INIT_ARM 488 printf("Allocating page tables\n"); 489 #endif 490 /* 491 * Set up the variables that define the availablilty of physical 492 * memory 493 */ 494 physical_start = 0xffffffff; 495 physical_end = 0; 496 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 497 if (bootconfig.dram[loop].address < physical_start) 498 physical_start = bootconfig.dram[loop].address; 499 memoryblock_end = bootconfig.dram[loop].address + 500 bootconfig.dram[loop].pages * PAGE_SIZE; 501 if (memoryblock_end > physical_end) 502 physical_end = memoryblock_end; 503 physmem += bootconfig.dram[loop].pages; 504 }; 505 /* constants for now, but might be changed/configured */ 506 dma_range_begin = (paddr_t) physical_start; 507 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 508 /* XXX HACK HACK XXX */ 509 /* dma_range_end = 0x18000000; */ 510 511 if (physical_start != bootconfig.dram[0].address) { 512 int oldblocks = 0; 513 514 /* 515 * must be a kinetic, as it's the only thing to shuffle memory 516 * around 517 */ 518 /* hack hack - throw away the slow dram */ 519 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 520 if (bootconfig.dram[loop].address < 521 bootconfig.dram[0].address) { 522 /* non kinetic ram */ 523 bootconfig.dram[loop].address = 0; 524 physmem -= bootconfig.dram[loop].pages; 525 bootconfig.drampages -= 526 bootconfig.dram[loop].pages; 527 bootconfig.dram[loop].pages = 0; 528 oldblocks++; 529 } 530 } 531 physical_start = bootconfig.dram[0].address; 532 bootconfig.dramblocks -= oldblocks; 533 } 534 535 physical_freestart = physical_start; 536 free_pages = bootconfig.drampages; 537 physical_freeend = physical_end; 538 539 540 /* 541 * AHUM !! set this variable ... it was set up in the old 1st 542 * stage bootloader 543 */ 544 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 545 546 /* Update the address of the first free page of physical memory */ 547 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 548 physical_freestart += 549 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 550 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 551 552 /* Define a macro to simplify memory allocation */ 553 #define valloc_pages(var, np) \ 554 alloc_pages((var).pv_pa, (np)); \ 555 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 556 557 #define alloc_pages(var, np) \ 558 (var) = physical_freestart; \ 559 physical_freestart += ((np) * PAGE_SIZE); \ 560 free_pages -= (np); \ 561 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 562 563 loop1 = 0; 564 kernel_l1pt.pv_pa = 0; 565 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 566 /* Are we 16KB aligned for an L1 ? */ 567 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 568 && kernel_l1pt.pv_pa == 0) { 569 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 570 } else { 571 valloc_pages(kernel_pt_table[loop1], 572 L2_TABLE_SIZE / PAGE_SIZE); 573 ++loop1; 574 } 575 } 576 577 578 #ifdef DIAGNOSTIC 579 /* This should never be able to happen but better confirm that. */ 580 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 581 panic2(("initarm: Failed to align the kernel page " 582 "directory\n")); 583 #endif 584 585 /* 586 * Allocate a page for the system page mapped to V0x00000000 587 * This page will just contain the system vectors and can be 588 * shared by all processes. 589 */ 590 alloc_pages(systempage.pv_pa, 1); 591 592 /* Allocate stacks for all modes */ 593 valloc_pages(irqstack, IRQ_STACK_SIZE); 594 valloc_pages(abtstack, ABT_STACK_SIZE); 595 valloc_pages(undstack, UND_STACK_SIZE); 596 valloc_pages(kernelstack, UPAGES); 597 598 #ifdef VERBOSE_INIT_ARM 599 printf("Setting up stacks :\n"); 600 printf("IRQ stack: p0x%08lx v0x%08lx\n", 601 irqstack.pv_pa, irqstack.pv_va); 602 printf("ABT stack: p0x%08lx v0x%08lx\n", 603 abtstack.pv_pa, abtstack.pv_va); 604 printf("UND stack: p0x%08lx v0x%08lx\n", 605 undstack.pv_pa, undstack.pv_va); 606 printf("SVC stack: p0x%08lx v0x%08lx\n", 607 kernelstack.pv_pa, kernelstack.pv_va); 608 printf("\n"); 609 #endif 610 611 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 612 613 #ifdef CPU_SA110 614 /* 615 * XXX totally stuffed hack to work round problems introduced 616 * in recent versions of the pmap code. Due to the calls used there 617 * we cannot allocate virtual memory during bootstrap. 618 */ 619 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 620 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 621 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 622 #endif /* CPU_SA110 */ 623 624 /* 625 * Ok we have allocated physical pages for the primary kernel 626 * page tables 627 */ 628 629 #ifdef VERBOSE_INIT_ARM 630 printf("Creating L1 page table\n"); 631 #endif 632 633 /* 634 * Now we start construction of the L1 page table 635 * We start by mapping the L2 page tables into the L1. 636 * This means that we can replace L1 mappings later on if necessary 637 */ 638 l1pagetable = kernel_l1pt.pv_pa; 639 640 /* Map the L2 pages tables in the L1 page table */ 641 pmap_link_l2pt(l1pagetable, 0x00000000, 642 &kernel_pt_table[KERNEL_PT_SYS]); 643 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 644 &kernel_pt_table[KERNEL_PT_KERNEL]); 645 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 646 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 647 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 648 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 649 &kernel_pt_table[KERNEL_PT_VMEM]); 650 651 /* update the top of the kernel VM */ 652 pmap_curmaxkvaddr = 653 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 654 655 #ifdef VERBOSE_INIT_ARM 656 printf("Mapping kernel\n"); 657 #endif 658 659 /* Now we fill in the L2 pagetable for the kernel code/data */ 660 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 661 /* 662 * The defines are a workaround for a recent problem that occurred 663 * with ARM 610 processors and some ARM 710 processors 664 * Other ARM 710 and StrongARM processors don't have a problem. 665 */ 666 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 667 #if defined(CPU_ARM6) || defined(CPU_ARM7) 668 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 669 physical_start, kernexec->a_text, 670 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 671 #else /* CPU_ARM6 || CPU_ARM7 */ 672 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 673 physical_start, kernexec->a_text, 674 VM_PROT_READ, PTE_CACHE); 675 #endif /* CPU_ARM6 || CPU_ARM7 */ 676 logical += pmap_map_chunk(l1pagetable, 677 KERNEL_TEXT_BASE + logical, physical_start + logical, 678 kerneldatasize - kernexec->a_text, 679 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 } else { /* !ZMAGIC */ 681 /* 682 * Most likely an ELF kernel ... 683 * XXX no distinction yet between read only and 684 * read/write area's ... 685 */ 686 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 687 physical_start, kerneldatasize, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 }; 690 691 692 #ifdef VERBOSE_INIT_ARM 693 printf("Constructing L2 page tables\n"); 694 #endif 695 696 /* Map the stack pages */ 697 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 698 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 700 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 702 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 703 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 704 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 705 706 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 707 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 708 709 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 710 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 711 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 712 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 713 } 714 715 /* Now we fill in the L2 pagetable for the VRAM */ 716 /* 717 * Current architectures mean that the VRAM is always in 1 718 * continuous bank. This means that we can just map the 2 meg 719 * that the VRAM would occupy. In theory we don't need a page 720 * table for VRAM, we could section map it but we would need 721 * the page tables if DRAM was in use. 722 * XXX please map two adjacent virtual areas to ONE physical 723 * area 724 */ 725 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 726 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 728 videomemory.vidm_pbase, videomemory.vidm_size, 729 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 730 731 /* Map the vector page. */ 732 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 733 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 734 735 /* Map the core memory needed before autoconfig */ 736 loop = 0; 737 while (l1_sec_table[loop].size) { 738 vm_size_t sz; 739 740 #ifdef VERBOSE_INIT_ARM 741 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 742 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 743 l1_sec_table[loop].va); 744 #endif 745 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 746 pmap_map_section(l1pagetable, 747 l1_sec_table[loop].va + sz, 748 l1_sec_table[loop].pa + sz, 749 l1_sec_table[loop].prot, 750 l1_sec_table[loop].cache); 751 ++loop; 752 } 753 754 /* 755 * Now we have the real page tables in place so we can switch 756 * to them. Once this is done we will be running with the 757 * REAL kernel page tables. 758 */ 759 760 /* Switch tables */ 761 #ifdef VERBOSE_INIT_ARM 762 printf("switching to new L1 page table\n"); 763 #endif 764 #ifdef VERBOSE_INIT_ARM 765 printf("switching domains\n"); 766 #endif 767 /* be a client to all domains */ 768 cpu_domains(0x55555555); 769 770 setttb(kernel_l1pt.pv_pa); 771 772 /* 773 * We must now clean the cache again.... 774 * Cleaning may be done by reading new data to displace any 775 * dirty data in the cache. This will have happened in setttb() 776 * but since we are boot strapping the addresses used for the read 777 * may have just been remapped and thus the cache could be out 778 * of sync. A re-clean after the switch will cure this. 779 * After booting there are no gross reloations of the kernel thus 780 * this problem will not occur after initarm(). 781 */ 782 cpu_idcache_wbinv_all(); 783 cpu_tlb_flushID(); 784 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 785 786 /* 787 * Moved from cpu_startup() as data_abort_handler() references 788 * this during uvm init 789 */ 790 proc0paddr = (struct user *)kernelstack.pv_va; 791 lwp0.l_addr = proc0paddr; 792 793 /* 794 * if there is support for a serial console ...we should now 795 * reattach it 796 */ 797 /* fcomcndetach();*/ 798 799 /* 800 * Reflect videomemory relocation in the videomemory structure 801 * and reinit console 802 */ 803 if (bootconfig.vram[0].pages == 0) { 804 videomemory.vidm_vbase = VMEM_VBASE; 805 } else { 806 videomemory.vidm_vbase = VMEM_VBASE; 807 bootconfig.display_start = VMEM_VBASE; 808 }; 809 vidc_base = (int *) VIDC_BASE; 810 iomd_base = IOMD_BASE; 811 812 #ifdef VERBOSE_INIT_ARM 813 printf("running on the new L1 page table!\n"); 814 printf("done.\n"); 815 #endif 816 817 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 818 819 #ifdef VERBOSE_INIT_ARM 820 printf("\n"); 821 #endif 822 823 /* 824 * Pages were allocated during the secondary bootstrap for the 825 * stacks for different CPU modes. 826 * We must now set the r13 registers in the different CPU modes to 827 * point to these stacks. 828 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 829 * of the stack memory. 830 */ 831 #ifdef VERBOSE_INIT_ARM 832 printf("init subsystems: stacks "); 833 console_flush(); 834 #endif 835 836 set_stackptr(PSR_IRQ32_MODE, 837 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 838 set_stackptr(PSR_ABT32_MODE, 839 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 840 set_stackptr(PSR_UND32_MODE, 841 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 842 #ifdef PMAP_DEBUG 843 if (pmap_debug_level >= 0) 844 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 845 kernelstack.pv_pa); 846 #endif /* PMAP_DEBUG */ 847 848 /* 849 * Well we should set a data abort handler. 850 * Once things get going this will change as we will need a proper 851 * handler. Until then we will use a handler that just panics but 852 * tells us why. 853 * Initialisation of the vectors will just panic on a data abort. 854 * This just fills in a slightly better one. 855 */ 856 #ifdef VERBOSE_INIT_ARM 857 printf("vectors "); 858 #endif 859 data_abort_handler_address = (u_int)data_abort_handler; 860 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 861 undefined_handler_address = (u_int)undefinedinstruction_bounce; 862 console_flush(); 863 864 865 /* 866 * At last ! 867 * We now have the kernel in physical memory from the bottom upwards. 868 * Kernel page tables are physically above this. 869 * The kernel is mapped to 0xf0000000 870 * The kernel data PTs will handle the mapping of 871 * 0xf1000000-0xf5ffffff (80 Mb) 872 * 2Meg of VRAM is mapped to 0xf7000000 873 * The page tables are mapped to 0xefc00000 874 * The IOMD is mapped to 0xf6000000 875 * The VIDC is mapped to 0xf6100000 876 * The IOMD/VIDC could be pushed up higher but i havent got 877 * sufficient documentation to do so; the addresses are not 878 * parametized yet and hard to read... better fix this before; 879 * its pretty unforgiving. 880 */ 881 882 /* Initialise the undefined instruction handlers */ 883 #ifdef VERBOSE_INIT_ARM 884 printf("undefined "); 885 #endif 886 undefined_init(); 887 console_flush(); 888 889 /* Load memory into UVM. */ 890 #ifdef VERBOSE_INIT_ARM 891 printf("page "); 892 #endif 893 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 894 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 895 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 896 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 897 898 if (start < physical_freestart) 899 start = physical_freestart; 900 if (end > physical_freeend) 901 end = physical_freeend; 902 903 /* XXX Consider DMA range intersection checking. */ 904 905 uvm_page_physload(atop(start), atop(end), 906 atop(start), atop(end), VM_FREELIST_DEFAULT); 907 } 908 909 /* Boot strap pmap telling it where the kernel page table is */ 910 #ifdef VERBOSE_INIT_ARM 911 printf("pmap "); 912 #endif 913 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 914 KERNEL_VM_BASE + KERNEL_VM_SIZE); 915 console_flush(); 916 917 /* Setup the IRQ system */ 918 #ifdef VERBOSE_INIT_ARM 919 printf("irq "); 920 #endif 921 console_flush(); 922 irq_init(); 923 #ifdef VERBOSE_INIT_ARM 924 printf("done.\n\n"); 925 #endif 926 927 #if NVIDCVIDEO>0 928 consinit(); /* necessary ? */ 929 #endif 930 931 /* Talk to the user */ 932 printf("NetBSD/evbarm booting ... \n"); 933 934 /* Tell the user if his boot loader is too old */ 935 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 936 (bootconfig.version != BOOTCONFIG_VERSION)) { 937 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 938 delay(5000000); 939 } 940 941 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 942 printf("Kernel arg string (@%p) %s\n", 943 bootconfig.args, bootconfig.args); 944 printf("\nBoot configuration structure reports the following " 945 "memory\n"); 946 947 printf(" DRAM block 0a at %08x size %08x " 948 "DRAM block 0b at %08x size %08x\n\r", 949 bootconfig.dram[0].address, 950 bootconfig.dram[0].pages * bootconfig.pagesize, 951 bootconfig.dram[1].address, 952 bootconfig.dram[1].pages * bootconfig.pagesize); 953 printf(" DRAM block 1a at %08x size %08x " 954 "DRAM block 1b at %08x size %08x\n\r", 955 bootconfig.dram[2].address, 956 bootconfig.dram[2].pages * bootconfig.pagesize, 957 bootconfig.dram[3].address, 958 bootconfig.dram[3].pages * bootconfig.pagesize); 959 printf(" VRAM block 0 at %08x size %08x\n\r", 960 bootconfig.vram[0].address, 961 bootconfig.vram[0].pages * bootconfig.pagesize); 962 963 #ifdef IPKDB 964 /* Initialise ipkdb */ 965 ipkdb_init(); 966 if (boothowto & RB_KDB) 967 ipkdb_connect(0); 968 #endif /* NIPKDB */ 969 970 #if NKSYMS || defined(DDB) || defined(LKM) 971 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 972 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 973 #endif 974 975 976 #ifdef DDB 977 db_machine_init(); 978 if (boothowto & RB_KDB) 979 Debugger(); 980 #endif /* DDB */ 981 982 /* We return the new stack pointer address */ 983 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 984 } 985 986 987 static void 988 process_kernel_args(void) 989 { 990 char *args; 991 992 /* Ok now we will check the arguments for interesting parameters. */ 993 args = bootconfig.args; 994 boothowto = 0; 995 996 /* Only arguments itself are passed from the new bootloader */ 997 while (*args == ' ') 998 ++args; 999 1000 boot_args = args; 1001 parse_mi_bootargs(boot_args); 1002 parse_rpc_bootargs(boot_args); 1003 } 1004 1005 1006 void 1007 parse_rpc_bootargs(char *args) 1008 { 1009 int integer; 1010 1011 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 1012 &integer)) { 1013 videodram_size = integer; 1014 /* Round to 4K page */ 1015 videodram_size *= 1024; 1016 videodram_size = round_page(videodram_size); 1017 if (videodram_size > 1024*1024) 1018 videodram_size = 1024*1024; 1019 } 1020 } 1021 /* End of machdep.c */ 1022
Indexes created Wed Oct 22 13:09:56 GMT 2025