eb7500atx_machdep.c revision 1.21.6.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.21.6.1 2012/06/02 11:08:44 mrg 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 dependent 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 1.21.6.1 2012/06/02 11:08:44 mrg 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/exec_aout.h> 67 #include <sys/ksyms.h> 68 #include <sys/bus.h> 69 70 #include <dev/cons.h> 71 72 #include <machine/db_machdep.h> 73 #include <ddb/db_sym.h> 74 #include <ddb/db_extern.h> 75 76 #include <uvm/uvm.h> 77 78 #include <machine/signal.h> 79 #include <machine/frame.h> 80 #include <machine/bootconfig.h> 81 #include <machine/cpu.h> 82 #include <machine/io.h> 83 #include <machine/intr.h> 84 #include <arm/cpuconf.h> 85 #include <arm/arm32/katelib.h> 86 #include <arm/arm32/machdep.h> 87 #include <arm/undefined.h> 88 #include <machine/rtc.h> 89 90 #include <arm/iomd/vidc.h> 91 #include <arm/iomd/iomdreg.h> 92 #include <arm/iomd/iomdvar.h> 93 94 #include <arm/iomd/vidcvideo.h> 95 96 #include <sys/device.h> 97 #include <dev/ic/pckbcvar.h> 98 99 #include <dev/i2c/i2cvar.h> 100 #include <dev/i2c/pcf8583var.h> 101 #include <arm/iomd/iomdiicvar.h> 102 103 /* static i2c_tag_t acorn32_i2c_tag;*/ 104 105 #include "ksyms.h" 106 107 /* Kernel text starts at the base of the kernel address space. */ 108 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 109 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 110 111 /* 112 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 113 * Fixed mappings exist from 0xf6000000 - 0xffffffff 114 */ 115 #define KERNEL_VM_SIZE 0x05000000 116 117 /* 118 * Address to call from cpu_reset() to reset the machine. 119 * This is machine architecture dependent as it varies depending 120 * on where the ROM appears when you turn the MMU off. 121 */ 122 u_int cpu_reset_address = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */ 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 uint32_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 paddr_t memoryblock_end; 152 153 #ifndef PMAP_STATIC_L1S 154 int max_processes = 64; /* Default number */ 155 #endif /* !PMAP_STATIC_L1S */ 156 157 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 158 159 /* Physical and virtual addresses for some global pages */ 160 pv_addr_t systempage; 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 166 paddr_t msgbufphys; 167 168 extern u_int data_abort_handler_address; 169 extern u_int prefetch_abort_handler_address; 170 extern u_int undefined_handler_address; 171 172 #ifdef PMAP_DEBUG 173 extern int pmap_debug_level; 174 #endif /* PMAP_DEBUG */ 175 176 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 177 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 178 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 179 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 180 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 181 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 182 183 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 184 185 186 #ifdef CPU_SA110 187 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 188 static vaddr_t sa110_cc_base; 189 #endif /* CPU_SA110 */ 190 191 /* Prototypes */ 192 void physcon_display_base(u_int); 193 extern void consinit(void); 194 195 void data_abort_handler(trapframe_t *); 196 void prefetch_abort_handler(trapframe_t *); 197 void undefinedinstruction_bounce(trapframe_t *frame); 198 199 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 200 static void process_kernel_args(void); 201 202 extern void dump_spl_masks(void); 203 204 void rpc_sa110_cc_setup(void); 205 206 void parse_rpc_bootargs(char *args); 207 208 extern void dumpsys(void); 209 210 211 # define console_flush() /* empty */ 212 213 214 #define panic2(a) do { \ 215 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 216 consinit(); \ 217 panic a; \ 218 } while (/* CONSTCOND */ 0) 219 220 /* 221 * void cpu_reboot(int howto, char *bootstr) 222 * 223 * Reboots the system 224 * 225 * Deal with any syncing, unmounting, dumping and shutdown hooks, 226 * then reset the CPU. 227 */ 228 229 /* NOTE: These variables will be removed, well some of them */ 230 231 extern u_int current_mask; 232 233 void 234 cpu_reboot(int howto, char *bootstr) 235 { 236 237 #ifdef DIAGNOSTIC 238 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 239 240 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 241 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 242 irqmasks[IPL_VM]); 243 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 244 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 245 246 /* dump_spl_masks(); */ 247 #endif /* DIAGNOSTIC */ 248 249 /* 250 * If we are still cold then hit the air brakes 251 * and crash to earth fast 252 */ 253 if (cold) { 254 doshutdownhooks(); 255 pmf_system_shutdown(boothowto); 256 printf("Halted while still in the ICE age.\n"); 257 printf("The operating system has halted.\n"); 258 printf("Please press any key to reboot.\n\n"); 259 cngetc(); 260 printf("rebooting...\n"); 261 cpu_reset(); 262 /*NOTREACHED*/ 263 } 264 265 /* Disable console buffering */ 266 cnpollc(1); 267 268 /* 269 * If RB_NOSYNC was not specified sync the discs. 270 * Note: Unless cold is set to 1 here, syslogd will die during 271 * the unmount. It looks like syslogd is getting woken up 272 * only to find that it cannot page part of the binary in as 273 * the filesystem has been unmounted. 274 */ 275 if (!(howto & RB_NOSYNC)) 276 bootsync(); 277 278 /* Say NO to interrupts */ 279 splhigh(); 280 281 /* Do a dump if requested. */ 282 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 283 dumpsys(); 284 285 /* 286 * Auto reboot overload protection 287 * 288 * This code stops the kernel entering an endless loop of reboot 289 * - panic cycles. This will have the effect of stopping further 290 * reboots after it has rebooted 8 times after panics. A clean 291 * halt or reboot will reset the counter. 292 */ 293 294 /* Run any shutdown hooks */ 295 doshutdownhooks(); 296 297 pmf_system_shutdown(boothowto); 298 299 /* Make sure IRQ's are disabled */ 300 IRQdisable; 301 302 if (howto & RB_HALT) { 303 printf("The operating system has halted.\n"); 304 printf("Please press any key to reboot.\n\n"); 305 cngetc(); 306 } 307 308 printf("rebooting...\n"); 309 cpu_reset(); 310 /*NOTREACHED*/ 311 } 312 313 314 /* 315 * u_int initarm(BootConfig *bootconf) 316 * 317 * Initial entry point on startup. This gets called before main() is 318 * entered. 319 * It should be responsible for setting up everything that must be 320 * in place when main is called. 321 * This includes 322 * Taking a copy of the boot configuration structure. 323 * Initialising the physical console so characters can be printed. 324 * Setting up page tables for the kernel 325 * Relocating the kernel to the bottom of physical memory 326 */ 327 328 /* 329 * this part is completely rewritten for the new bootloader ... It features 330 * a flat memory map with a mapping comparable to the EBSA arm32 machine 331 * to boost the portability and likeness of the code 332 */ 333 334 /* 335 * Mapping table for core kernel memory. This memory is mapped at init 336 * time with section mappings. 337 * 338 * XXX One big assumption in the current architecture seems that the kernel is 339 * XXX supposed to be mapped into bootconfig.dram[0]. 340 */ 341 342 #define ONE_MB 0x100000 343 344 struct l1_sec_map { 345 vaddr_t va; 346 paddr_t pa; 347 vsize_t size; 348 vm_prot_t prot; 349 int cache; 350 } l1_sec_table[] = { 351 /* Map 1Mb section for VIDC20 */ 352 { VIDC_BASE, VIDC_HW_BASE, 353 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 354 PTE_NOCACHE }, 355 356 /* Map 1Mb section from IOMD */ 357 { IOMD_BASE, IOMD_HW_BASE, 358 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 359 PTE_NOCACHE }, 360 361 /* Map 1Mb of COMBO (and module space) */ 362 { IO_BASE, IO_HW_BASE, 363 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 364 PTE_NOCACHE }, 365 { 0, 0, 0, 0, 0 } 366 }; 367 368 369 static void 370 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 371 { 372 /* check for bootconfig v2+ structure */ 373 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 374 /* v2+ cleaned up structure found */ 375 *bootconf = *raw_bootconf; 376 return; 377 } else { 378 panic2(("Internal error: no valid bootconfig block found")); 379 } 380 } 381 382 383 u_int 384 initarm(void *cookie) 385 { 386 struct bootconfig *raw_bootconf = cookie; 387 int loop; 388 int loop1; 389 u_int logical; 390 u_int kerneldatasize; 391 u_int l1pagetable; 392 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 393 394 /* 395 * Heads up ... Setup the CPU / MMU / TLB functions 396 */ 397 set_cpufuncs(); 398 399 /* canonicalise the boot configuration structure to alow versioning */ 400 canonicalise_bootconfig(&bootconfig, raw_bootconf); 401 booted_kernel = bootconfig.kernelname; 402 403 /* if the wscons interface is used, switch off VERBOSE booting :( */ 404 #if NVIDCVIDEO>0 405 # undef VERBOSE_INIT_ARM 406 # undef PMAP_DEBUG 407 #endif 408 409 /* 410 * Initialise the video memory descriptor 411 * 412 * Note: all references to the video memory virtual/physical address 413 * should go via this structure. 414 */ 415 416 /* Hardwire it on the place the bootloader tells us */ 417 videomemory.vidm_vbase = bootconfig.display_start; 418 videomemory.vidm_pbase = bootconfig.display_phys; 419 videomemory.vidm_size = bootconfig.display_size; 420 if (bootconfig.vram[0].pages) 421 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 422 else 423 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 424 vidc_base = (int *) VIDC_HW_BASE; 425 iomd_base = IOMD_HW_BASE; 426 427 /* 428 * Initialise the physical console 429 * This is done in main() but for the moment we do it here so that 430 * we can use printf in initarm() before main() has been called. 431 * only for `vidcconsole!' ... not wscons 432 */ 433 #if NVIDCVIDEO == 0 434 consinit(); 435 #endif 436 437 /* 438 * Initialise the diagnostic serial console 439 * This allows a means of generating output during initarm(). 440 * Once all the memory map changes are complete we can call consinit() 441 * and not have to worry about things moving. 442 */ 443 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 444 /* XXX snif .... i am still not able to this */ 445 446 /* 447 * We have the following memory map (derived from EBSA) 448 * 449 * virtual address == physical address apart from the areas: 450 * 0x00000000 -> 0x000fffff which is mapped to 451 * top 1MB of physical memory 452 * 0xf0000000 -> 0xf0ffffff wich is mapped to 453 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 454 * 455 * This means that the kernel is mapped suitably for continuing 456 * execution, all I/O is mapped 1:1 virtual to physical and 457 * physical memory is accessible. 458 * 459 * The initarm() has the responsibility for creating the kernel 460 * page tables. 461 * It must also set up various memory pointers that are used 462 * by pmap etc. 463 */ 464 465 /* START OF REAL NEW STUFF */ 466 467 /* Check to make sure the page size is correct */ 468 if (PAGE_SIZE != bootconfig.pagesize) 469 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 470 bootconfig.pagesize, PAGE_SIZE)); 471 472 /* process arguments */ 473 process_kernel_args(); 474 475 476 /* 477 * Now set up the page tables for the kernel ... this part is copied 478 * in a (modified?) way from the EBSA machine port.... 479 */ 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("Allocating page tables\n"); 483 #endif 484 /* 485 * Set up the variables that define the availablilty of physical 486 * memory 487 */ 488 physical_start = 0xffffffff; 489 physical_end = 0; 490 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 491 if (bootconfig.dram[loop].address < physical_start) 492 physical_start = bootconfig.dram[loop].address; 493 memoryblock_end = bootconfig.dram[loop].address + 494 bootconfig.dram[loop].pages * PAGE_SIZE; 495 if (memoryblock_end > physical_end) 496 physical_end = memoryblock_end; 497 physmem += bootconfig.dram[loop].pages; 498 }; 499 /* constants for now, but might be changed/configured */ 500 dma_range_begin = (paddr_t) physical_start; 501 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 502 /* XXX HACK HACK XXX */ 503 /* dma_range_end = 0x18000000; */ 504 505 if (physical_start != bootconfig.dram[0].address) { 506 int oldblocks = 0; 507 508 /* 509 * must be a kinetic, as it's the only thing to shuffle memory 510 * around 511 */ 512 /* hack hack - throw away the slow dram */ 513 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 514 if (bootconfig.dram[loop].address < 515 bootconfig.dram[0].address) { 516 /* non kinetic ram */ 517 bootconfig.dram[loop].address = 0; 518 physmem -= bootconfig.dram[loop].pages; 519 bootconfig.drampages -= 520 bootconfig.dram[loop].pages; 521 bootconfig.dram[loop].pages = 0; 522 oldblocks++; 523 } 524 } 525 physical_start = bootconfig.dram[0].address; 526 bootconfig.dramblocks -= oldblocks; 527 } 528 529 physical_freestart = physical_start; 530 free_pages = bootconfig.drampages; 531 physical_freeend = physical_end; 532 533 534 /* 535 * AHUM !! set this variable ... it was set up in the old 1st 536 * stage bootloader 537 */ 538 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 539 540 /* Update the address of the first free page of physical memory */ 541 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 542 physical_freestart += 543 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 544 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 545 546 /* Define a macro to simplify memory allocation */ 547 #define valloc_pages(var, np) \ 548 alloc_pages((var).pv_pa, (np)); \ 549 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 550 551 #define alloc_pages(var, np) \ 552 (var) = physical_freestart; \ 553 physical_freestart += ((np) * PAGE_SIZE); \ 554 free_pages -= (np); \ 555 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 556 557 loop1 = 0; 558 kernel_l1pt.pv_pa = 0; 559 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 560 /* Are we 16KB aligned for an L1 ? */ 561 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 562 && kernel_l1pt.pv_pa == 0) { 563 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 564 } else { 565 valloc_pages(kernel_pt_table[loop1], 566 L2_TABLE_SIZE / PAGE_SIZE); 567 ++loop1; 568 } 569 } 570 571 572 #ifdef DIAGNOSTIC 573 /* This should never be able to happen but better confirm that. */ 574 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 575 panic2(("initarm: Failed to align the kernel page " 576 "directory\n")); 577 #endif 578 579 /* 580 * Allocate a page for the system page mapped to V0x00000000 581 * This page will just contain the system vectors and can be 582 * shared by all processes. 583 */ 584 alloc_pages(systempage.pv_pa, 1); 585 586 /* Allocate stacks for all modes */ 587 valloc_pages(irqstack, IRQ_STACK_SIZE); 588 valloc_pages(abtstack, ABT_STACK_SIZE); 589 valloc_pages(undstack, UND_STACK_SIZE); 590 valloc_pages(kernelstack, UPAGES); 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Setting up stacks :\n"); 594 printf("IRQ stack: p0x%08lx v0x%08lx\n", 595 irqstack.pv_pa, irqstack.pv_va); 596 printf("ABT stack: p0x%08lx v0x%08lx\n", 597 abtstack.pv_pa, abtstack.pv_va); 598 printf("UND stack: p0x%08lx v0x%08lx\n", 599 undstack.pv_pa, undstack.pv_va); 600 printf("SVC stack: p0x%08lx v0x%08lx\n", 601 kernelstack.pv_pa, kernelstack.pv_va); 602 printf("\n"); 603 #endif 604 605 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 606 607 #ifdef CPU_SA110 608 /* 609 * XXX totally stuffed hack to work round problems introduced 610 * in recent versions of the pmap code. Due to the calls used there 611 * we cannot allocate virtual memory during bootstrap. 612 */ 613 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 614 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 615 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 616 #endif /* CPU_SA110 */ 617 618 /* 619 * Ok we have allocated physical pages for the primary kernel 620 * page tables 621 */ 622 623 #ifdef VERBOSE_INIT_ARM 624 printf("Creating L1 page table\n"); 625 #endif 626 627 /* 628 * Now we start construction of the L1 page table 629 * We start by mapping the L2 page tables into the L1. 630 * This means that we can replace L1 mappings later on if necessary 631 */ 632 l1pagetable = kernel_l1pt.pv_pa; 633 634 /* Map the L2 pages tables in the L1 page table */ 635 pmap_link_l2pt(l1pagetable, 0x00000000, 636 &kernel_pt_table[KERNEL_PT_SYS]); 637 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 638 &kernel_pt_table[KERNEL_PT_KERNEL]); 639 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 640 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 641 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 642 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 643 &kernel_pt_table[KERNEL_PT_VMEM]); 644 645 /* update the top of the kernel VM */ 646 pmap_curmaxkvaddr = 647 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("Mapping kernel\n"); 651 #endif 652 653 /* Now we fill in the L2 pagetable for the kernel code/data */ 654 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 655 /* 656 * The defines are a workaround for a recent problem that occurred 657 * with ARM 610 processors and some ARM 710 processors 658 * Other ARM 710 and StrongARM processors don't have a problem. 659 */ 660 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 661 #if defined(CPU_ARM6) || defined(CPU_ARM7) 662 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 663 physical_start, kernexec->a_text, 664 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 665 #else /* CPU_ARM6 || CPU_ARM7 */ 666 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 667 physical_start, kernexec->a_text, 668 VM_PROT_READ, PTE_CACHE); 669 #endif /* CPU_ARM6 || CPU_ARM7 */ 670 logical += pmap_map_chunk(l1pagetable, 671 KERNEL_TEXT_BASE + logical, physical_start + logical, 672 kerneldatasize - kernexec->a_text, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 } else { /* !ZMAGIC */ 675 /* 676 * Most likely an ELF kernel ... 677 * XXX no distinction yet between read only and 678 * read/write area's ... 679 */ 680 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 681 physical_start, kerneldatasize, 682 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 683 }; 684 685 686 #ifdef VERBOSE_INIT_ARM 687 printf("Constructing L2 page tables\n"); 688 #endif 689 690 /* Map the stack pages */ 691 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 692 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 693 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 694 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 695 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 696 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 697 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 698 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 700 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 701 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 702 703 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 704 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 705 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 706 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 707 } 708 709 /* Now we fill in the L2 pagetable for the VRAM */ 710 /* 711 * Current architectures mean that the VRAM is always in 1 712 * continuous bank. This means that we can just map the 2 meg 713 * that the VRAM would occupy. In theory we don't need a page 714 * table for VRAM, we could section map it but we would need 715 * the page tables if DRAM was in use. 716 * XXX please map two adjacent virtual areas to ONE physical 717 * area 718 */ 719 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 720 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 721 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 722 videomemory.vidm_pbase, videomemory.vidm_size, 723 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 724 725 /* Map the vector page. */ 726 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 727 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 728 729 /* Map the core memory needed before autoconfig */ 730 loop = 0; 731 while (l1_sec_table[loop].size) { 732 vm_size_t sz; 733 734 #ifdef VERBOSE_INIT_ARM 735 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 736 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 737 l1_sec_table[loop].va); 738 #endif 739 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 740 pmap_map_section(l1pagetable, 741 l1_sec_table[loop].va + sz, 742 l1_sec_table[loop].pa + sz, 743 l1_sec_table[loop].prot, 744 l1_sec_table[loop].cache); 745 ++loop; 746 } 747 748 /* 749 * Now we have the real page tables in place so we can switch 750 * to them. Once this is done we will be running with the 751 * REAL kernel page tables. 752 */ 753 754 #ifdef VERBOSE_INIT_ARM 755 printf("switching domains\n"); 756 #endif 757 /* be a client to all domains */ 758 cpu_domains(0x55555555); 759 760 /* Switch tables */ 761 #ifdef VERBOSE_INIT_ARM 762 printf("switching to new L1 page table\n"); 763 #endif 764 cpu_setttb(kernel_l1pt.pv_pa); 765 766 /* 767 * We must now clean the cache again.... 768 * Cleaning may be done by reading new data to displace any 769 * dirty data in the cache. This will have happened in cpu_setttb() 770 * but since we are boot strapping the addresses used for the read 771 * may have just been remapped and thus the cache could be out 772 * of sync. A re-clean after the switch will cure this. 773 * After booting there are no gross reloations of the kernel thus 774 * this problem will not occur after initarm(). 775 */ 776 cpu_idcache_wbinv_all(); 777 cpu_tlb_flushID(); 778 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 779 780 /* 781 * Moved from cpu_startup() as data_abort_handler() references 782 * this during uvm init 783 */ 784 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 785 786 /* 787 * if there is support for a serial console ...we should now 788 * reattach it 789 */ 790 /* fcomcndetach();*/ 791 792 /* 793 * Reflect videomemory relocation in the videomemory structure 794 * and reinit console 795 */ 796 if (bootconfig.vram[0].pages == 0) { 797 videomemory.vidm_vbase = VMEM_VBASE; 798 } else { 799 videomemory.vidm_vbase = VMEM_VBASE; 800 bootconfig.display_start = VMEM_VBASE; 801 }; 802 vidc_base = (int *) VIDC_BASE; 803 iomd_base = IOMD_BASE; 804 805 #ifdef VERBOSE_INIT_ARM 806 printf("running on the new L1 page table!\n"); 807 printf("done.\n"); 808 #endif 809 810 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 811 812 #ifdef VERBOSE_INIT_ARM 813 printf("\n"); 814 #endif 815 816 /* 817 * Pages were allocated during the secondary bootstrap for the 818 * stacks for different CPU modes. 819 * We must now set the r13 registers in the different CPU modes to 820 * point to these stacks. 821 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 822 * of the stack memory. 823 */ 824 #ifdef VERBOSE_INIT_ARM 825 printf("init subsystems: stacks "); 826 console_flush(); 827 #endif 828 829 set_stackptr(PSR_IRQ32_MODE, 830 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 831 set_stackptr(PSR_ABT32_MODE, 832 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 833 set_stackptr(PSR_UND32_MODE, 834 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 835 #ifdef PMAP_DEBUG 836 if (pmap_debug_level >= 0) 837 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 838 kernelstack.pv_pa); 839 #endif /* PMAP_DEBUG */ 840 841 /* 842 * Well we should set a data abort handler. 843 * Once things get going this will change as we will need a proper 844 * handler. Until then we will use a handler that just panics but 845 * tells us why. 846 * Initialisation of the vectors will just panic on a data abort. 847 * This just fills in a slightly better one. 848 */ 849 #ifdef VERBOSE_INIT_ARM 850 printf("vectors "); 851 #endif 852 data_abort_handler_address = (u_int)data_abort_handler; 853 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 854 undefined_handler_address = (u_int)undefinedinstruction_bounce; 855 console_flush(); 856 857 858 /* 859 * At last ! 860 * We now have the kernel in physical memory from the bottom upwards. 861 * Kernel page tables are physically above this. 862 * The kernel is mapped to 0xf0000000 863 * The kernel data PTs will handle the mapping of 864 * 0xf1000000-0xf5ffffff (80 Mb) 865 * 2Meg of VRAM is mapped to 0xf7000000 866 * The page tables are mapped to 0xefc00000 867 * The IOMD is mapped to 0xf6000000 868 * The VIDC is mapped to 0xf6100000 869 * The IOMD/VIDC could be pushed up higher but i havent got 870 * sufficient documentation to do so; the addresses are not 871 * parametized yet and hard to read... better fix this before; 872 * its pretty unforgiving. 873 */ 874 875 /* Initialise the undefined instruction handlers */ 876 #ifdef VERBOSE_INIT_ARM 877 printf("undefined "); 878 #endif 879 undefined_init(); 880 console_flush(); 881 882 /* Load memory into UVM. */ 883 #ifdef VERBOSE_INIT_ARM 884 printf("page "); 885 #endif 886 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 887 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 888 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 889 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 890 891 if (start < physical_freestart) 892 start = physical_freestart; 893 if (end > physical_freeend) 894 end = physical_freeend; 895 896 /* XXX Consider DMA range intersection checking. */ 897 898 uvm_page_physload(atop(start), atop(end), 899 atop(start), atop(end), VM_FREELIST_DEFAULT); 900 } 901 902 /* Boot strap pmap telling it where the kernel page table is */ 903 #ifdef VERBOSE_INIT_ARM 904 printf("pmap "); 905 #endif 906 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 907 console_flush(); 908 909 /* Setup the IRQ system */ 910 #ifdef VERBOSE_INIT_ARM 911 printf("irq "); 912 #endif 913 console_flush(); 914 irq_init(); 915 #ifdef VERBOSE_INIT_ARM 916 printf("done.\n\n"); 917 #endif 918 919 #if NVIDCVIDEO>0 920 consinit(); /* necessary ? */ 921 #endif 922 923 /* Talk to the user */ 924 printf("NetBSD/evbarm booting ... \n"); 925 926 /* Tell the user if his boot loader is too old */ 927 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 928 (bootconfig.version != BOOTCONFIG_VERSION)) { 929 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 930 delay(5000000); 931 } 932 933 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 934 printf("Kernel arg string (@%p) %s\n", 935 bootconfig.args, bootconfig.args); 936 printf("\nBoot configuration structure reports the following " 937 "memory\n"); 938 939 printf(" DRAM block 0a at %08x size %08x " 940 "DRAM block 0b at %08x size %08x\n\r", 941 bootconfig.dram[0].address, 942 bootconfig.dram[0].pages * bootconfig.pagesize, 943 bootconfig.dram[1].address, 944 bootconfig.dram[1].pages * bootconfig.pagesize); 945 printf(" DRAM block 1a at %08x size %08x " 946 "DRAM block 1b at %08x size %08x\n\r", 947 bootconfig.dram[2].address, 948 bootconfig.dram[2].pages * bootconfig.pagesize, 949 bootconfig.dram[3].address, 950 bootconfig.dram[3].pages * bootconfig.pagesize); 951 printf(" VRAM block 0 at %08x size %08x\n\r", 952 bootconfig.vram[0].address, 953 bootconfig.vram[0].pages * bootconfig.pagesize); 954 955 #if NKSYMS || defined(DDB) || defined(MODULAR) 956 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 957 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 958 #endif 959 960 961 #ifdef DDB 962 db_machine_init(); 963 if (boothowto & RB_KDB) 964 Debugger(); 965 #endif /* DDB */ 966 967 /* We return the new stack pointer address */ 968 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 969 } 970 971 972 static void 973 process_kernel_args(void) 974 { 975 char *args; 976 977 /* Ok now we will check the arguments for interesting parameters. */ 978 args = bootconfig.args; 979 boothowto = 0; 980 981 /* Only arguments itself are passed from the new bootloader */ 982 while (*args == ' ') 983 ++args; 984 985 boot_args = args; 986 parse_mi_bootargs(boot_args); 987 parse_rpc_bootargs(boot_args); 988 } 989 990 991 void 992 parse_rpc_bootargs(char *args) 993 { 994 int integer; 995 996 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 997 &integer)) { 998 videodram_size = integer; 999 /* Round to 4K page */ 1000 videodram_size *= 1024; 1001 videodram_size = round_page(videodram_size); 1002 if (videodram_size > 1024*1024) 1003 videodram_size = 1024*1024; 1004 } 1005 } 1006 /* End of machdep.c */ 1007
Indexes created Wed Oct 22 13:09:56 GMT 2025