eb7500atx_machdep.c revision 1.13.4.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.13.4.1 2009/05/13 17:16:03 jym 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_modular.h" 52 #include "opt_pmap_debug.h" 53 #include "vidcvideo.h" 54 #include "pckbc.h" 55 56 #include <sys/param.h> 57 58 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.13.4.1 2009/05/13 17:16:03 jym Exp $"); 59 60 #include <sys/systm.h> 61 #include <sys/kernel.h> 62 #include <sys/reboot.h> 63 #include <sys/proc.h> 64 #include <sys/msgbuf.h> 65 #include <sys/exec.h> 66 #include <sys/ksyms.h> 67 68 #include <dev/cons.h> 69 70 #include <machine/db_machdep.h> 71 #include <ddb/db_sym.h> 72 #include <ddb/db_extern.h> 73 74 #include <uvm/uvm.h> 75 76 #include <machine/signal.h> 77 #include <machine/frame.h> 78 #include <machine/bootconfig.h> 79 #include <machine/cpu.h> 80 #include <machine/io.h> 81 #include <machine/intr.h> 82 #include <arm/cpuconf.h> 83 #include <arm/arm32/katelib.h> 84 #include <arm/arm32/machdep.h> 85 #include <arm/undefined.h> 86 #include <machine/rtc.h> 87 #include <machine/bus.h> 88 89 #include <arm/iomd/vidc.h> 90 #include <arm/iomd/iomdreg.h> 91 #include <arm/iomd/iomdvar.h> 92 93 #include <arm/iomd/vidcvideo.h> 94 95 #include <sys/device.h> 96 #include <dev/ic/pckbcvar.h> 97 98 #include <dev/i2c/i2cvar.h> 99 #include <dev/i2c/pcf8583var.h> 100 #include <arm/iomd/iomdiicvar.h> 101 102 /* static i2c_tag_t acorn32_i2c_tag;*/ 103 104 #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 #define UND_STACK_SIZE 1 131 132 133 struct bootconfig bootconfig; /* Boot config storage */ 134 videomemory_t videomemory; /* Video memory descriptor */ 135 136 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 137 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 138 139 extern int *vidc_base; 140 extern u_int32_t iomd_base; 141 extern struct bus_space iomd_bs_tag; 142 143 paddr_t physical_start; 144 paddr_t physical_freestart; 145 paddr_t physical_freeend; 146 paddr_t physical_end; 147 paddr_t dma_range_begin; 148 paddr_t dma_range_end; 149 150 u_int free_pages; 151 int physmem = 0; 152 paddr_t memoryblock_end; 153 154 #ifndef PMAP_STATIC_L1S 155 int max_processes = 64; /* Default number */ 156 #endif /* !PMAP_STATIC_L1S */ 157 158 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 159 160 /* Physical and virtual addresses for some global pages */ 161 pv_addr_t systempage; 162 pv_addr_t irqstack; 163 pv_addr_t undstack; 164 pv_addr_t abtstack; 165 pv_addr_t kernelstack; 166 167 paddr_t msgbufphys; 168 169 extern u_int data_abort_handler_address; 170 extern u_int prefetch_abort_handler_address; 171 extern u_int undefined_handler_address; 172 173 #ifdef PMAP_DEBUG 174 extern int pmap_debug_level; 175 #endif /* PMAP_DEBUG */ 176 177 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 178 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 179 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 180 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 181 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 182 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 183 184 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 185 186 struct user *proc0paddr; 187 188 #ifdef CPU_SA110 189 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 190 static vaddr_t sa110_cc_base; 191 #endif /* CPU_SA110 */ 192 193 /* Prototypes */ 194 void physcon_display_base(u_int); 195 extern void consinit(void); 196 197 void data_abort_handler(trapframe_t *); 198 void prefetch_abort_handler(trapframe_t *); 199 void undefinedinstruction_bounce(trapframe_t *frame); 200 201 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 202 static void process_kernel_args(void); 203 204 extern void dump_spl_masks(void); 205 206 void rpc_sa110_cc_setup(void); 207 208 void parse_rpc_bootargs(char *args); 209 210 extern void dumpsys(void); 211 212 213 # define console_flush() /* empty */ 214 215 216 #define panic2(a) do { \ 217 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 218 consinit(); \ 219 panic a; \ 220 } while (/* CONSTCOND */ 0) 221 222 /* 223 * void cpu_reboot(int howto, char *bootstr) 224 * 225 * Reboots the system 226 * 227 * Deal with any syncing, unmounting, dumping and shutdown hooks, 228 * then reset the CPU. 229 */ 230 231 /* NOTE: These variables will be removed, well some of them */ 232 233 extern u_int current_mask; 234 235 void 236 cpu_reboot(int howto, char *bootstr) 237 { 238 239 #ifdef DIAGNOSTIC 240 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 241 242 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 243 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 244 irqmasks[IPL_VM]); 245 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 246 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 247 248 /* dump_spl_masks(); */ 249 #endif /* DIAGNOSTIC */ 250 251 /* 252 * If we are still cold then hit the air brakes 253 * and crash to earth fast 254 */ 255 if (cold) { 256 doshutdownhooks(); 257 pmf_system_shutdown(boothowto); 258 printf("Halted while still in the ICE age.\n"); 259 printf("The operating system has halted.\n"); 260 printf("Please press any key to reboot.\n\n"); 261 cngetc(); 262 printf("rebooting...\n"); 263 cpu_reset(); 264 /*NOTREACHED*/ 265 } 266 267 /* Disable console buffering */ 268 cnpollc(1); 269 270 /* 271 * If RB_NOSYNC was not specified sync the discs. 272 * Note: Unless cold is set to 1 here, syslogd will die during 273 * the unmount. It looks like syslogd is getting woken up 274 * only to find that it cannot page part of the binary in as 275 * the filesystem has been unmounted. 276 */ 277 if (!(howto & RB_NOSYNC)) 278 bootsync(); 279 280 /* Say NO to interrupts */ 281 splhigh(); 282 283 /* Do a dump if requested. */ 284 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 285 dumpsys(); 286 287 /* 288 * Auto reboot overload protection 289 * 290 * This code stops the kernel entering an endless loop of reboot 291 * - panic cycles. This will have the effect of stopping further 292 * reboots after it has rebooted 8 times after panics. A clean 293 * halt or reboot will reset the counter. 294 */ 295 296 /* Run any shutdown hooks */ 297 doshutdownhooks(); 298 299 pmf_system_shutdown(boothowto); 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 cpu_reset(); 312 /*NOTREACHED*/ 313 } 314 315 316 /* 317 * u_int initarm(BootConfig *bootconf) 318 * 319 * Initial entry point on startup. This gets called before main() is 320 * entered. 321 * It should be responsible for setting up everything that must be 322 * in place when main is called. 323 * This includes 324 * Taking a copy of the boot configuration structure. 325 * Initialising the physical console so characters can be printed. 326 * Setting up page tables for the kernel 327 * Relocating the kernel to the bottom of physical memory 328 */ 329 330 /* 331 * this part is completely rewritten for the new bootloader ... It features 332 * a flat memory map with a mapping comparable to the EBSA arm32 machine 333 * to boost the portability and likeness of the code 334 */ 335 336 /* 337 * Mapping table for core kernel memory. This memory is mapped at init 338 * time with section mappings. 339 * 340 * XXX One big assumption in the current architecture seems that the kernel is 341 * XXX supposed to be mapped into bootconfig.dram[0]. 342 */ 343 344 #define ONE_MB 0x100000 345 346 struct l1_sec_map { 347 vaddr_t va; 348 paddr_t pa; 349 vsize_t size; 350 vm_prot_t prot; 351 int cache; 352 } l1_sec_table[] = { 353 /* Map 1Mb section for VIDC20 */ 354 { VIDC_BASE, VIDC_HW_BASE, 355 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 356 PTE_NOCACHE }, 357 358 /* Map 1Mb section from IOMD */ 359 { IOMD_BASE, IOMD_HW_BASE, 360 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 361 PTE_NOCACHE }, 362 363 /* Map 1Mb of COMBO (and module space) */ 364 { IO_BASE, IO_HW_BASE, 365 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 366 PTE_NOCACHE }, 367 { 0, 0, 0, 0, 0 } 368 }; 369 370 371 static void 372 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 373 { 374 /* check for bootconfig v2+ structure */ 375 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 376 /* v2+ cleaned up structure found */ 377 *bootconf = *raw_bootconf; 378 return; 379 } else { 380 panic2(("Internal error: no valid bootconfig block found")); 381 } 382 } 383 384 385 u_int 386 initarm(void *cookie) 387 { 388 struct bootconfig *raw_bootconf = cookie; 389 int loop; 390 int loop1; 391 u_int logical; 392 u_int kerneldatasize; 393 u_int l1pagetable; 394 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 395 396 /* 397 * Heads up ... Setup the CPU / MMU / TLB functions 398 */ 399 set_cpufuncs(); 400 401 /* canonicalise the boot configuration structure to alow versioning */ 402 canonicalise_bootconfig(&bootconfig, raw_bootconf); 403 booted_kernel = bootconfig.kernelname; 404 405 /* if the wscons interface is used, switch off VERBOSE booting :( */ 406 #if NVIDCVIDEO>0 407 # undef VERBOSE_INIT_ARM 408 # undef PMAP_DEBUG 409 #endif 410 411 /* 412 * Initialise the video memory descriptor 413 * 414 * Note: all references to the video memory virtual/physical address 415 * should go via this structure. 416 */ 417 418 /* Hardwire it on the place the bootloader tells us */ 419 videomemory.vidm_vbase = bootconfig.display_start; 420 videomemory.vidm_pbase = bootconfig.display_phys; 421 videomemory.vidm_size = bootconfig.display_size; 422 if (bootconfig.vram[0].pages) 423 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 424 else 425 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 426 vidc_base = (int *) VIDC_HW_BASE; 427 iomd_base = IOMD_HW_BASE; 428 429 /* 430 * Initialise the physical console 431 * This is done in main() but for the moment we do it here so that 432 * we can use printf in initarm() before main() has been called. 433 * only for `vidcconsole!' ... not wscons 434 */ 435 #if NVIDCVIDEO == 0 436 consinit(); 437 #endif 438 439 /* 440 * Initialise the diagnostic serial console 441 * This allows a means of generating output during initarm(). 442 * Once all the memory map changes are complete we can call consinit() 443 * and not have to worry about things moving. 444 */ 445 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 446 /* XXX snif .... i am still not able to this */ 447 448 /* 449 * We have the following memory map (derived from EBSA) 450 * 451 * virtual address == physical address apart from the areas: 452 * 0x00000000 -> 0x000fffff which is mapped to 453 * top 1MB of physical memory 454 * 0xf0000000 -> 0xf0ffffff wich is mapped to 455 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 456 * 457 * This means that the kernel is mapped suitably for continuing 458 * execution, all I/O is mapped 1:1 virtual to physical and 459 * physical memory is accessible. 460 * 461 * The initarm() has the responsibility for creating the kernel 462 * page tables. 463 * It must also set up various memory pointers that are used 464 * by pmap etc. 465 */ 466 467 /* START OF REAL NEW STUFF */ 468 469 /* Check to make sure the page size is correct */ 470 if (PAGE_SIZE != bootconfig.pagesize) 471 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 472 bootconfig.pagesize, PAGE_SIZE)); 473 474 /* process arguments */ 475 process_kernel_args(); 476 477 478 /* 479 * Now set up the page tables for the kernel ... this part is copied 480 * in a (modified?) way from the EBSA machine port.... 481 */ 482 483 #ifdef VERBOSE_INIT_ARM 484 printf("Allocating page tables\n"); 485 #endif 486 /* 487 * Set up the variables that define the availablilty of physical 488 * memory 489 */ 490 physical_start = 0xffffffff; 491 physical_end = 0; 492 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 493 if (bootconfig.dram[loop].address < physical_start) 494 physical_start = bootconfig.dram[loop].address; 495 memoryblock_end = bootconfig.dram[loop].address + 496 bootconfig.dram[loop].pages * PAGE_SIZE; 497 if (memoryblock_end > physical_end) 498 physical_end = memoryblock_end; 499 physmem += bootconfig.dram[loop].pages; 500 }; 501 /* constants for now, but might be changed/configured */ 502 dma_range_begin = (paddr_t) physical_start; 503 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 504 /* XXX HACK HACK XXX */ 505 /* dma_range_end = 0x18000000; */ 506 507 if (physical_start != bootconfig.dram[0].address) { 508 int oldblocks = 0; 509 510 /* 511 * must be a kinetic, as it's the only thing to shuffle memory 512 * around 513 */ 514 /* hack hack - throw away the slow dram */ 515 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 516 if (bootconfig.dram[loop].address < 517 bootconfig.dram[0].address) { 518 /* non kinetic ram */ 519 bootconfig.dram[loop].address = 0; 520 physmem -= bootconfig.dram[loop].pages; 521 bootconfig.drampages -= 522 bootconfig.dram[loop].pages; 523 bootconfig.dram[loop].pages = 0; 524 oldblocks++; 525 } 526 } 527 physical_start = bootconfig.dram[0].address; 528 bootconfig.dramblocks -= oldblocks; 529 } 530 531 physical_freestart = physical_start; 532 free_pages = bootconfig.drampages; 533 physical_freeend = physical_end; 534 535 536 /* 537 * AHUM !! set this variable ... it was set up in the old 1st 538 * stage bootloader 539 */ 540 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 541 542 /* Update the address of the first free page of physical memory */ 543 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 544 physical_freestart += 545 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 546 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 547 548 /* Define a macro to simplify memory allocation */ 549 #define valloc_pages(var, np) \ 550 alloc_pages((var).pv_pa, (np)); \ 551 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 552 553 #define alloc_pages(var, np) \ 554 (var) = physical_freestart; \ 555 physical_freestart += ((np) * PAGE_SIZE); \ 556 free_pages -= (np); \ 557 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 558 559 loop1 = 0; 560 kernel_l1pt.pv_pa = 0; 561 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 562 /* Are we 16KB aligned for an L1 ? */ 563 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 564 && kernel_l1pt.pv_pa == 0) { 565 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 566 } else { 567 valloc_pages(kernel_pt_table[loop1], 568 L2_TABLE_SIZE / PAGE_SIZE); 569 ++loop1; 570 } 571 } 572 573 574 #ifdef DIAGNOSTIC 575 /* This should never be able to happen but better confirm that. */ 576 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 577 panic2(("initarm: Failed to align the kernel page " 578 "directory\n")); 579 #endif 580 581 /* 582 * Allocate a page for the system page mapped to V0x00000000 583 * This page will just contain the system vectors and can be 584 * shared by all processes. 585 */ 586 alloc_pages(systempage.pv_pa, 1); 587 588 /* Allocate stacks for all modes */ 589 valloc_pages(irqstack, IRQ_STACK_SIZE); 590 valloc_pages(abtstack, ABT_STACK_SIZE); 591 valloc_pages(undstack, UND_STACK_SIZE); 592 valloc_pages(kernelstack, UPAGES); 593 594 #ifdef VERBOSE_INIT_ARM 595 printf("Setting up stacks :\n"); 596 printf("IRQ stack: p0x%08lx v0x%08lx\n", 597 irqstack.pv_pa, irqstack.pv_va); 598 printf("ABT stack: p0x%08lx v0x%08lx\n", 599 abtstack.pv_pa, abtstack.pv_va); 600 printf("UND stack: p0x%08lx v0x%08lx\n", 601 undstack.pv_pa, undstack.pv_va); 602 printf("SVC stack: p0x%08lx v0x%08lx\n", 603 kernelstack.pv_pa, kernelstack.pv_va); 604 printf("\n"); 605 #endif 606 607 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 608 609 #ifdef CPU_SA110 610 /* 611 * XXX totally stuffed hack to work round problems introduced 612 * in recent versions of the pmap code. Due to the calls used there 613 * we cannot allocate virtual memory during bootstrap. 614 */ 615 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 616 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 617 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 618 #endif /* CPU_SA110 */ 619 620 /* 621 * Ok we have allocated physical pages for the primary kernel 622 * page tables 623 */ 624 625 #ifdef VERBOSE_INIT_ARM 626 printf("Creating L1 page table\n"); 627 #endif 628 629 /* 630 * Now we start construction of the L1 page table 631 * We start by mapping the L2 page tables into the L1. 632 * This means that we can replace L1 mappings later on if necessary 633 */ 634 l1pagetable = kernel_l1pt.pv_pa; 635 636 /* Map the L2 pages tables in the L1 page table */ 637 pmap_link_l2pt(l1pagetable, 0x00000000, 638 &kernel_pt_table[KERNEL_PT_SYS]); 639 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 640 &kernel_pt_table[KERNEL_PT_KERNEL]); 641 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 642 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 643 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 644 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 645 &kernel_pt_table[KERNEL_PT_VMEM]); 646 647 /* update the top of the kernel VM */ 648 pmap_curmaxkvaddr = 649 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 650 651 #ifdef VERBOSE_INIT_ARM 652 printf("Mapping kernel\n"); 653 #endif 654 655 /* Now we fill in the L2 pagetable for the kernel code/data */ 656 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 657 /* 658 * The defines are a workaround for a recent problem that occurred 659 * with ARM 610 processors and some ARM 710 processors 660 * Other ARM 710 and StrongARM processors don't have a problem. 661 */ 662 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 663 #if defined(CPU_ARM6) || defined(CPU_ARM7) 664 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 665 physical_start, kernexec->a_text, 666 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 667 #else /* CPU_ARM6 || CPU_ARM7 */ 668 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 669 physical_start, kernexec->a_text, 670 VM_PROT_READ, PTE_CACHE); 671 #endif /* CPU_ARM6 || CPU_ARM7 */ 672 logical += pmap_map_chunk(l1pagetable, 673 KERNEL_TEXT_BASE + logical, physical_start + logical, 674 kerneldatasize - kernexec->a_text, 675 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 } else { /* !ZMAGIC */ 677 /* 678 * Most likely an ELF kernel ... 679 * XXX no distinction yet between read only and 680 * read/write area's ... 681 */ 682 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 683 physical_start, kerneldatasize, 684 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 685 }; 686 687 688 #ifdef VERBOSE_INIT_ARM 689 printf("Constructing L2 page tables\n"); 690 #endif 691 692 /* Map the stack pages */ 693 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 694 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 695 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 696 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 697 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 698 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 700 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 702 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 703 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 704 705 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 706 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 707 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 708 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 709 } 710 711 /* Now we fill in the L2 pagetable for the VRAM */ 712 /* 713 * Current architectures mean that the VRAM is always in 1 714 * continuous bank. This means that we can just map the 2 meg 715 * that the VRAM would occupy. In theory we don't need a page 716 * table for VRAM, we could section map it but we would need 717 * the page tables if DRAM was in use. 718 * XXX please map two adjacent virtual areas to ONE physical 719 * area 720 */ 721 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 722 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 723 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 724 videomemory.vidm_pbase, videomemory.vidm_size, 725 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 726 727 /* Map the vector page. */ 728 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 729 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 730 731 /* Map the core memory needed before autoconfig */ 732 loop = 0; 733 while (l1_sec_table[loop].size) { 734 vm_size_t sz; 735 736 #ifdef VERBOSE_INIT_ARM 737 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 738 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 739 l1_sec_table[loop].va); 740 #endif 741 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 742 pmap_map_section(l1pagetable, 743 l1_sec_table[loop].va + sz, 744 l1_sec_table[loop].pa + sz, 745 l1_sec_table[loop].prot, 746 l1_sec_table[loop].cache); 747 ++loop; 748 } 749 750 /* 751 * Now we have the real page tables in place so we can switch 752 * to them. Once this is done we will be running with the 753 * REAL kernel page tables. 754 */ 755 756 #ifdef VERBOSE_INIT_ARM 757 printf("switching domains\n"); 758 #endif 759 /* be a client to all domains */ 760 cpu_domains(0x55555555); 761 762 /* Switch tables */ 763 #ifdef VERBOSE_INIT_ARM 764 printf("switching to new L1 page table\n"); 765 #endif 766 setttb(kernel_l1pt.pv_pa); 767 768 /* 769 * We must now clean the cache again.... 770 * Cleaning may be done by reading new data to displace any 771 * dirty data in the cache. This will have happened in setttb() 772 * but since we are boot strapping the addresses used for the read 773 * may have just been remapped and thus the cache could be out 774 * of sync. A re-clean after the switch will cure this. 775 * After booting there are no gross reloations of the kernel thus 776 * this problem will not occur after initarm(). 777 */ 778 cpu_idcache_wbinv_all(); 779 cpu_tlb_flushID(); 780 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 781 782 /* 783 * Moved from cpu_startup() as data_abort_handler() references 784 * this during uvm init 785 */ 786 proc0paddr = (struct user *)kernelstack.pv_va; 787 lwp0.l_addr = proc0paddr; 788 789 /* 790 * if there is support for a serial console ...we should now 791 * reattach it 792 */ 793 /* fcomcndetach();*/ 794 795 /* 796 * Reflect videomemory relocation in the videomemory structure 797 * and reinit console 798 */ 799 if (bootconfig.vram[0].pages == 0) { 800 videomemory.vidm_vbase = VMEM_VBASE; 801 } else { 802 videomemory.vidm_vbase = VMEM_VBASE; 803 bootconfig.display_start = VMEM_VBASE; 804 }; 805 vidc_base = (int *) VIDC_BASE; 806 iomd_base = IOMD_BASE; 807 808 #ifdef VERBOSE_INIT_ARM 809 printf("running on the new L1 page table!\n"); 810 printf("done.\n"); 811 #endif 812 813 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 814 815 #ifdef VERBOSE_INIT_ARM 816 printf("\n"); 817 #endif 818 819 /* 820 * Pages were allocated during the secondary bootstrap for the 821 * stacks for different CPU modes. 822 * We must now set the r13 registers in the different CPU modes to 823 * point to these stacks. 824 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 825 * of the stack memory. 826 */ 827 #ifdef VERBOSE_INIT_ARM 828 printf("init subsystems: stacks "); 829 console_flush(); 830 #endif 831 832 set_stackptr(PSR_IRQ32_MODE, 833 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 834 set_stackptr(PSR_ABT32_MODE, 835 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 836 set_stackptr(PSR_UND32_MODE, 837 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 838 #ifdef PMAP_DEBUG 839 if (pmap_debug_level >= 0) 840 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 841 kernelstack.pv_pa); 842 #endif /* PMAP_DEBUG */ 843 844 /* 845 * Well we should set a data abort handler. 846 * Once things get going this will change as we will need a proper 847 * handler. Until then we will use a handler that just panics but 848 * tells us why. 849 * Initialisation of the vectors will just panic on a data abort. 850 * This just fills in a slightly better one. 851 */ 852 #ifdef VERBOSE_INIT_ARM 853 printf("vectors "); 854 #endif 855 data_abort_handler_address = (u_int)data_abort_handler; 856 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 857 undefined_handler_address = (u_int)undefinedinstruction_bounce; 858 console_flush(); 859 860 861 /* 862 * At last ! 863 * We now have the kernel in physical memory from the bottom upwards. 864 * Kernel page tables are physically above this. 865 * The kernel is mapped to 0xf0000000 866 * The kernel data PTs will handle the mapping of 867 * 0xf1000000-0xf5ffffff (80 Mb) 868 * 2Meg of VRAM is mapped to 0xf7000000 869 * The page tables are mapped to 0xefc00000 870 * The IOMD is mapped to 0xf6000000 871 * The VIDC is mapped to 0xf6100000 872 * The IOMD/VIDC could be pushed up higher but i havent got 873 * sufficient documentation to do so; the addresses are not 874 * parametized yet and hard to read... better fix this before; 875 * its pretty unforgiving. 876 */ 877 878 /* Initialise the undefined instruction handlers */ 879 #ifdef VERBOSE_INIT_ARM 880 printf("undefined "); 881 #endif 882 undefined_init(); 883 console_flush(); 884 885 /* Load memory into UVM. */ 886 #ifdef VERBOSE_INIT_ARM 887 printf("page "); 888 #endif 889 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 890 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 891 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 892 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 893 894 if (start < physical_freestart) 895 start = physical_freestart; 896 if (end > physical_freeend) 897 end = physical_freeend; 898 899 /* XXX Consider DMA range intersection checking. */ 900 901 uvm_page_physload(atop(start), atop(end), 902 atop(start), atop(end), VM_FREELIST_DEFAULT); 903 } 904 905 /* Boot strap pmap telling it where the kernel page table is */ 906 #ifdef VERBOSE_INIT_ARM 907 printf("pmap "); 908 #endif 909 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 910 console_flush(); 911 912 /* Setup the IRQ system */ 913 #ifdef VERBOSE_INIT_ARM 914 printf("irq "); 915 #endif 916 console_flush(); 917 irq_init(); 918 #ifdef VERBOSE_INIT_ARM 919 printf("done.\n\n"); 920 #endif 921 922 #if NVIDCVIDEO>0 923 consinit(); /* necessary ? */ 924 #endif 925 926 /* Talk to the user */ 927 printf("NetBSD/evbarm booting ... \n"); 928 929 /* Tell the user if his boot loader is too old */ 930 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 931 (bootconfig.version != BOOTCONFIG_VERSION)) { 932 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 933 delay(5000000); 934 } 935 936 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 937 printf("Kernel arg string (@%p) %s\n", 938 bootconfig.args, bootconfig.args); 939 printf("\nBoot configuration structure reports the following " 940 "memory\n"); 941 942 printf(" DRAM block 0a at %08x size %08x " 943 "DRAM block 0b at %08x size %08x\n\r", 944 bootconfig.dram[0].address, 945 bootconfig.dram[0].pages * bootconfig.pagesize, 946 bootconfig.dram[1].address, 947 bootconfig.dram[1].pages * bootconfig.pagesize); 948 printf(" DRAM block 1a at %08x size %08x " 949 "DRAM block 1b at %08x size %08x\n\r", 950 bootconfig.dram[2].address, 951 bootconfig.dram[2].pages * bootconfig.pagesize, 952 bootconfig.dram[3].address, 953 bootconfig.dram[3].pages * bootconfig.pagesize); 954 printf(" VRAM block 0 at %08x size %08x\n\r", 955 bootconfig.vram[0].address, 956 bootconfig.vram[0].pages * bootconfig.pagesize); 957 958 #if NKSYMS || defined(DDB) || defined(MODULAR) 959 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 960 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 961 #endif 962 963 964 #ifdef DDB 965 db_machine_init(); 966 if (boothowto & RB_KDB) 967 Debugger(); 968 #endif /* DDB */ 969 970 /* We return the new stack pointer address */ 971 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 972 } 973 974 975 static void 976 process_kernel_args(void) 977 { 978 char *args; 979 980 /* Ok now we will check the arguments for interesting parameters. */ 981 args = bootconfig.args; 982 boothowto = 0; 983 984 /* Only arguments itself are passed from the new bootloader */ 985 while (*args == ' ') 986 ++args; 987 988 boot_args = args; 989 parse_mi_bootargs(boot_args); 990 parse_rpc_bootargs(boot_args); 991 } 992 993 994 void 995 parse_rpc_bootargs(char *args) 996 { 997 int integer; 998 999 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 1000 &integer)) { 1001 videodram_size = integer; 1002 /* Round to 4K page */ 1003 videodram_size *= 1024; 1004 videodram_size = round_page(videodram_size); 1005 if (videodram_size > 1024*1024) 1006 videodram_size = 1024*1024; 1007 } 1008 } 1009 /* End of machdep.c */ 1010
Indexes created Thu Oct 23 22:10:10 GMT 2025