eb7500atx_machdep.c revision 1.26
1 /* $NetBSD: eb7500atx_machdep.c,v 1.26 2013/08/18 21:42:16 matt 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 1.26 2013/08/18 21:42:16 matt 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 #include <sys/cpu.h> 70 #include <sys/intr.h> 71 #include <sys/device.h> 72 73 #include <dev/cons.h> 74 75 #include <dev/ic/pckbcvar.h> 76 77 #include <dev/i2c/i2cvar.h> 78 #include <dev/i2c/pcf8583var.h> 79 80 #include <machine/db_machdep.h> 81 #include <ddb/db_sym.h> 82 #include <ddb/db_extern.h> 83 84 #include <uvm/uvm.h> 85 86 #include <arm/locore.h> 87 #include <arm/undefined.h> 88 89 #include <machine/signal.h> 90 #include <machine/bootconfig.h> 91 #include <machine/io.h> 92 #include <arm/arm32/katelib.h> 93 #include <arm/arm32/machdep.h> 94 #include <machine/rtc.h> 95 96 #include <arm/iomd/vidc.h> 97 #include <arm/iomd/iomdreg.h> 98 #include <arm/iomd/iomdvar.h> 99 #include <arm/iomd/vidcvideo.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 dependent as it varies depending 119 * on where the ROM appears when you turn the MMU off. 120 */ 121 122 #define VERBOSE_INIT_ARM 123 124 struct bootconfig bootconfig; /* Boot config storage */ 125 videomemory_t videomemory; /* Video memory descriptor */ 126 127 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 128 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 129 130 extern int *vidc_base; 131 extern uint32_t iomd_base; 132 extern struct bus_space iomd_bs_tag; 133 134 paddr_t physical_start; 135 paddr_t physical_freestart; 136 paddr_t physical_freeend; 137 paddr_t physical_end; 138 paddr_t dma_range_begin; 139 paddr_t dma_range_end; 140 141 u_int free_pages; 142 paddr_t memoryblock_end; 143 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 149 150 paddr_t msgbufphys; 151 152 #ifdef PMAP_DEBUG 153 extern int pmap_debug_level; 154 #endif /* PMAP_DEBUG */ 155 156 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 157 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 158 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 159 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 160 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 161 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 162 163 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 164 165 166 #ifdef CPU_SA110 167 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 168 static vaddr_t sa110_cc_base; 169 #endif /* CPU_SA110 */ 170 171 /* Prototypes */ 172 void physcon_display_base(u_int); 173 extern void consinit(void); 174 175 void data_abort_handler(trapframe_t *); 176 void prefetch_abort_handler(trapframe_t *); 177 void undefinedinstruction_bounce(trapframe_t *frame); 178 179 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 180 static void process_kernel_args(void); 181 182 extern void dump_spl_masks(void); 183 184 void rpc_sa110_cc_setup(void); 185 186 void parse_rpc_bootargs(char *args); 187 188 extern void dumpsys(void); 189 190 191 # define console_flush() /* empty */ 192 193 194 #define panic2(a) do { \ 195 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 196 consinit(); \ 197 panic a; \ 198 } while (/* CONSTCOND */ 0) 199 200 /* 201 * void cpu_reboot(int howto, char *bootstr) 202 * 203 * Reboots the system 204 * 205 * Deal with any syncing, unmounting, dumping and shutdown hooks, 206 * then reset the CPU. 207 */ 208 209 /* NOTE: These variables will be removed, well some of them */ 210 211 extern u_int current_mask; 212 213 void 214 cpu_reboot(int howto, char *bootstr) 215 { 216 217 #ifdef DIAGNOSTIC 218 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 219 220 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 221 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 222 irqmasks[IPL_VM]); 223 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 224 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 225 226 /* dump_spl_masks(); */ 227 #endif /* DIAGNOSTIC */ 228 229 /* 230 * If we are still cold then hit the air brakes 231 * and crash to earth fast 232 */ 233 if (cold) { 234 doshutdownhooks(); 235 pmf_system_shutdown(boothowto); 236 printf("Halted while still in the ICE age.\n"); 237 printf("The operating system has halted.\n"); 238 printf("Please press any key to reboot.\n\n"); 239 cngetc(); 240 printf("rebooting...\n"); 241 cpu_reset(); 242 /*NOTREACHED*/ 243 } 244 245 /* Disable console buffering */ 246 cnpollc(1); 247 248 /* 249 * If RB_NOSYNC was not specified sync the discs. 250 * Note: Unless cold is set to 1 here, syslogd will die during 251 * the unmount. It looks like syslogd is getting woken up 252 * only to find that it cannot page part of the binary in as 253 * the filesystem has been unmounted. 254 */ 255 if (!(howto & RB_NOSYNC)) 256 bootsync(); 257 258 /* Say NO to interrupts */ 259 splhigh(); 260 261 /* Do a dump if requested. */ 262 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 263 dumpsys(); 264 265 /* 266 * Auto reboot overload protection 267 * 268 * This code stops the kernel entering an endless loop of reboot 269 * - panic cycles. This will have the effect of stopping further 270 * reboots after it has rebooted 8 times after panics. A clean 271 * halt or reboot will reset the counter. 272 */ 273 274 /* Run any shutdown hooks */ 275 doshutdownhooks(); 276 277 pmf_system_shutdown(boothowto); 278 279 /* Make sure IRQ's are disabled */ 280 IRQdisable; 281 282 if (howto & RB_HALT) { 283 printf("The operating system has halted.\n"); 284 printf("Please press any key to reboot.\n\n"); 285 cngetc(); 286 } 287 288 printf("rebooting...\n"); 289 cpu_reset(); 290 /*NOTREACHED*/ 291 } 292 293 294 /* 295 * u_int initarm(BootConfig *bootconf) 296 * 297 * Initial entry point on startup. This gets called before main() is 298 * entered. 299 * It should be responsible for setting up everything that must be 300 * in place when main is called. 301 * This includes 302 * Taking a copy of the boot configuration structure. 303 * Initialising the physical console so characters can be printed. 304 * Setting up page tables for the kernel 305 * Relocating the kernel to the bottom of physical memory 306 */ 307 308 /* 309 * this part is completely rewritten for the new bootloader ... It features 310 * a flat memory map with a mapping comparable to the EBSA arm32 machine 311 * to boost the portability and likeness of the code 312 */ 313 314 /* 315 * Mapping table for core kernel memory. This memory is mapped at init 316 * time with section mappings. 317 * 318 * XXX One big assumption in the current architecture seems that the kernel is 319 * XXX supposed to be mapped into bootconfig.dram[0]. 320 */ 321 322 #define ONE_MB 0x100000 323 324 struct l1_sec_map { 325 vaddr_t va; 326 paddr_t pa; 327 vsize_t size; 328 vm_prot_t prot; 329 int cache; 330 } l1_sec_table[] = { 331 /* Map 1Mb section for VIDC20 */ 332 { VIDC_BASE, VIDC_HW_BASE, 333 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 334 PTE_NOCACHE }, 335 336 /* Map 1Mb section from IOMD */ 337 { IOMD_BASE, IOMD_HW_BASE, 338 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 339 PTE_NOCACHE }, 340 341 /* Map 1Mb of COMBO (and module space) */ 342 { IO_BASE, IO_HW_BASE, 343 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 344 PTE_NOCACHE }, 345 { 0, 0, 0, 0, 0 } 346 }; 347 348 349 static void 350 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 351 { 352 /* check for bootconfig v2+ structure */ 353 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 354 /* v2+ cleaned up structure found */ 355 *bootconf = *raw_bootconf; 356 return; 357 } else { 358 panic2(("Internal error: no valid bootconfig block found")); 359 } 360 } 361 362 363 u_int 364 initarm(void *cookie) 365 { 366 struct bootconfig *raw_bootconf = cookie; 367 int loop; 368 int loop1; 369 u_int logical; 370 u_int kerneldatasize; 371 u_int l1pagetable; 372 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 373 374 /* 375 * Heads up ... Setup the CPU / MMU / TLB functions 376 */ 377 set_cpufuncs(); 378 379 /* canonicalise the boot configuration structure to alow versioning */ 380 canonicalise_bootconfig(&bootconfig, raw_bootconf); 381 booted_kernel = bootconfig.kernelname; 382 383 /* if the wscons interface is used, switch off VERBOSE booting :( */ 384 #if NVIDCVIDEO>0 385 # undef VERBOSE_INIT_ARM 386 # undef PMAP_DEBUG 387 #endif 388 389 /* 390 * Initialise the video memory descriptor 391 * 392 * Note: all references to the video memory virtual/physical address 393 * should go via this structure. 394 */ 395 396 /* Hardwire it on the place the bootloader tells us */ 397 videomemory.vidm_vbase = bootconfig.display_start; 398 videomemory.vidm_pbase = bootconfig.display_phys; 399 videomemory.vidm_size = bootconfig.display_size; 400 if (bootconfig.vram[0].pages) 401 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 402 else 403 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 404 vidc_base = (int *) VIDC_HW_BASE; 405 iomd_base = IOMD_HW_BASE; 406 407 /* 408 * Initialise the physical console 409 * This is done in main() but for the moment we do it here so that 410 * we can use printf in initarm() before main() has been called. 411 * only for `vidcconsole!' ... not wscons 412 */ 413 #if NVIDCVIDEO == 0 414 consinit(); 415 #endif 416 417 /* 418 * Initialise the diagnostic serial console 419 * This allows a means of generating output during initarm(). 420 * Once all the memory map changes are complete we can call consinit() 421 * and not have to worry about things moving. 422 */ 423 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 424 /* XXX snif .... i am still not able to this */ 425 426 /* 427 * We have the following memory map (derived from EBSA) 428 * 429 * virtual address == physical address apart from the areas: 430 * 0x00000000 -> 0x000fffff which is mapped to 431 * top 1MB of physical memory 432 * 0xf0000000 -> 0xf0ffffff wich is mapped to 433 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 434 * 435 * This means that the kernel is mapped suitably for continuing 436 * execution, all I/O is mapped 1:1 virtual to physical and 437 * physical memory is accessible. 438 * 439 * The initarm() has the responsibility for creating the kernel 440 * page tables. 441 * It must also set up various memory pointers that are used 442 * by pmap etc. 443 */ 444 445 /* START OF REAL NEW STUFF */ 446 447 /* Check to make sure the page size is correct */ 448 if (PAGE_SIZE != bootconfig.pagesize) 449 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 450 bootconfig.pagesize, PAGE_SIZE)); 451 452 /* process arguments */ 453 process_kernel_args(); 454 455 456 /* 457 * Now set up the page tables for the kernel ... this part is copied 458 * in a (modified?) way from the EBSA machine port.... 459 */ 460 461 #ifdef VERBOSE_INIT_ARM 462 printf("Allocating page tables\n"); 463 #endif 464 /* 465 * Set up the variables that define the availablilty of physical 466 * memory 467 */ 468 physical_start = 0xffffffff; 469 physical_end = 0; 470 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 471 if (bootconfig.dram[loop].address < physical_start) 472 physical_start = bootconfig.dram[loop].address; 473 memoryblock_end = bootconfig.dram[loop].address + 474 bootconfig.dram[loop].pages * PAGE_SIZE; 475 if (memoryblock_end > physical_end) 476 physical_end = memoryblock_end; 477 physmem += bootconfig.dram[loop].pages; 478 }; 479 /* constants for now, but might be changed/configured */ 480 dma_range_begin = (paddr_t) physical_start; 481 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 482 /* XXX HACK HACK XXX */ 483 /* dma_range_end = 0x18000000; */ 484 485 if (physical_start != bootconfig.dram[0].address) { 486 int oldblocks = 0; 487 488 /* 489 * must be a kinetic, as it's the only thing to shuffle memory 490 * around 491 */ 492 /* hack hack - throw away the slow dram */ 493 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 494 if (bootconfig.dram[loop].address < 495 bootconfig.dram[0].address) { 496 /* non kinetic ram */ 497 bootconfig.dram[loop].address = 0; 498 physmem -= bootconfig.dram[loop].pages; 499 bootconfig.drampages -= 500 bootconfig.dram[loop].pages; 501 bootconfig.dram[loop].pages = 0; 502 oldblocks++; 503 } 504 } 505 physical_start = bootconfig.dram[0].address; 506 bootconfig.dramblocks -= oldblocks; 507 } 508 509 physical_freestart = physical_start; 510 free_pages = bootconfig.drampages; 511 physical_freeend = physical_end; 512 513 514 /* 515 * AHUM !! set this variable ... it was set up in the old 1st 516 * stage bootloader 517 */ 518 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 519 520 /* Update the address of the first free page of physical memory */ 521 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 522 physical_freestart += 523 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 524 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 525 526 /* Define a macro to simplify memory allocation */ 527 #define valloc_pages(var, np) \ 528 alloc_pages((var).pv_pa, (np)); \ 529 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 530 531 #define alloc_pages(var, np) \ 532 (var) = physical_freestart; \ 533 physical_freestart += ((np) * PAGE_SIZE); \ 534 free_pages -= (np); \ 535 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 536 537 loop1 = 0; 538 kernel_l1pt.pv_pa = 0; 539 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 540 /* Are we 16KB aligned for an L1 ? */ 541 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 542 && kernel_l1pt.pv_pa == 0) { 543 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 544 } else { 545 valloc_pages(kernel_pt_table[loop1], 546 L2_TABLE_SIZE / PAGE_SIZE); 547 ++loop1; 548 } 549 } 550 551 552 #ifdef DIAGNOSTIC 553 /* This should never be able to happen but better confirm that. */ 554 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 555 panic2(("initarm: Failed to align the kernel page " 556 "directory\n")); 557 #endif 558 559 /* 560 * Allocate a page for the system page mapped to V0x00000000 561 * This page will just contain the system vectors and can be 562 * shared by all processes. 563 */ 564 alloc_pages(systempage.pv_pa, 1); 565 566 /* Allocate stacks for all modes */ 567 valloc_pages(irqstack, IRQ_STACK_SIZE); 568 valloc_pages(abtstack, ABT_STACK_SIZE); 569 valloc_pages(undstack, UND_STACK_SIZE); 570 valloc_pages(kernelstack, UPAGES); 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("Setting up stacks :\n"); 574 printf("IRQ stack: p0x%08lx v0x%08lx\n", 575 irqstack.pv_pa, irqstack.pv_va); 576 printf("ABT stack: p0x%08lx v0x%08lx\n", 577 abtstack.pv_pa, abtstack.pv_va); 578 printf("UND stack: p0x%08lx v0x%08lx\n", 579 undstack.pv_pa, undstack.pv_va); 580 printf("SVC stack: p0x%08lx v0x%08lx\n", 581 kernelstack.pv_pa, kernelstack.pv_va); 582 printf("\n"); 583 #endif 584 585 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 586 587 #ifdef CPU_SA110 588 /* 589 * XXX totally stuffed hack to work round problems introduced 590 * in recent versions of the pmap code. Due to the calls used there 591 * we cannot allocate virtual memory during bootstrap. 592 */ 593 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 594 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 595 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 596 #endif /* CPU_SA110 */ 597 598 /* 599 * Ok we have allocated physical pages for the primary kernel 600 * page tables 601 */ 602 603 #ifdef VERBOSE_INIT_ARM 604 printf("Creating L1 page table\n"); 605 #endif 606 607 /* 608 * Now we start construction of the L1 page table 609 * We start by mapping the L2 page tables into the L1. 610 * This means that we can replace L1 mappings later on if necessary 611 */ 612 l1pagetable = kernel_l1pt.pv_pa; 613 614 /* Map the L2 pages tables in the L1 page table */ 615 pmap_link_l2pt(l1pagetable, 0x00000000, 616 &kernel_pt_table[KERNEL_PT_SYS]); 617 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 618 &kernel_pt_table[KERNEL_PT_KERNEL]); 619 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 620 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 621 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 622 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 623 &kernel_pt_table[KERNEL_PT_VMEM]); 624 625 /* update the top of the kernel VM */ 626 pmap_curmaxkvaddr = 627 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 628 629 #ifdef VERBOSE_INIT_ARM 630 printf("Mapping kernel\n"); 631 #endif 632 633 /* Now we fill in the L2 pagetable for the kernel code/data */ 634 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 635 /* 636 * The defines are a workaround for a recent problem that occurred 637 * with ARM 610 processors and some ARM 710 processors 638 * Other ARM 710 and StrongARM processors don't have a problem. 639 */ 640 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 641 #if defined(CPU_ARM6) || defined(CPU_ARM7) 642 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 643 physical_start, kernexec->a_text, 644 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 #else /* CPU_ARM6 || CPU_ARM7 */ 646 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 647 physical_start, kernexec->a_text, 648 VM_PROT_READ, PTE_CACHE); 649 #endif /* CPU_ARM6 || CPU_ARM7 */ 650 logical += pmap_map_chunk(l1pagetable, 651 KERNEL_TEXT_BASE + logical, physical_start + logical, 652 kerneldatasize - kernexec->a_text, 653 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 654 } else { /* !ZMAGIC */ 655 /* 656 * Most likely an ELF kernel ... 657 * XXX no distinction yet between read only and 658 * read/write area's ... 659 */ 660 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 661 physical_start, kerneldatasize, 662 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 663 }; 664 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("Constructing L2 page tables\n"); 668 #endif 669 670 /* Map the stack pages */ 671 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 672 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 673 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 674 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 675 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 676 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 677 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 678 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 679 680 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 681 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 682 683 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 684 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 685 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 686 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 687 } 688 689 /* Now we fill in the L2 pagetable for the VRAM */ 690 /* 691 * Current architectures mean that the VRAM is always in 1 692 * continuous bank. This means that we can just map the 2 meg 693 * that the VRAM would occupy. In theory we don't need a page 694 * table for VRAM, we could section map it but we would need 695 * the page tables if DRAM was in use. 696 * XXX please map two adjacent virtual areas to ONE physical 697 * area 698 */ 699 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 700 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 702 videomemory.vidm_pbase, videomemory.vidm_size, 703 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 704 705 /* Map the vector page. */ 706 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 707 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 708 709 /* Map the core memory needed before autoconfig */ 710 loop = 0; 711 while (l1_sec_table[loop].size) { 712 vm_size_t sz; 713 714 #ifdef VERBOSE_INIT_ARM 715 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 716 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 717 l1_sec_table[loop].va); 718 #endif 719 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 720 pmap_map_section(l1pagetable, 721 l1_sec_table[loop].va + sz, 722 l1_sec_table[loop].pa + sz, 723 l1_sec_table[loop].prot, 724 l1_sec_table[loop].cache); 725 ++loop; 726 } 727 728 /* 729 * Now we have the real page tables in place so we can switch 730 * to them. Once this is done we will be running with the 731 * REAL kernel page tables. 732 */ 733 734 #ifdef VERBOSE_INIT_ARM 735 printf("switching domains\n"); 736 #endif 737 /* be a client to all domains */ 738 cpu_domains(0x55555555); 739 740 /* Switch tables */ 741 #ifdef VERBOSE_INIT_ARM 742 printf("switching to new L1 page table\n"); 743 #endif 744 cpu_setttb(kernel_l1pt.pv_pa, true); 745 746 /* 747 * We must now clean the cache again.... 748 * Cleaning may be done by reading new data to displace any 749 * dirty data in the cache. This will have happened in cpu_setttb() 750 * but since we are boot strapping the addresses used for the read 751 * may have just been remapped and thus the cache could be out 752 * of sync. A re-clean after the switch will cure this. 753 * After booting there are no gross reloations of the kernel thus 754 * this problem will not occur after initarm(). 755 */ 756 cpu_idcache_wbinv_all(); 757 cpu_tlb_flushID(); 758 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 759 760 /* 761 * Moved from cpu_startup() as data_abort_handler() references 762 * this during uvm init 763 */ 764 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 765 766 /* 767 * if there is support for a serial console ...we should now 768 * reattach it 769 */ 770 /* fcomcndetach();*/ 771 772 /* 773 * Reflect videomemory relocation in the videomemory structure 774 * and reinit console 775 */ 776 if (bootconfig.vram[0].pages == 0) { 777 videomemory.vidm_vbase = VMEM_VBASE; 778 } else { 779 videomemory.vidm_vbase = VMEM_VBASE; 780 bootconfig.display_start = VMEM_VBASE; 781 }; 782 vidc_base = (int *) VIDC_BASE; 783 iomd_base = IOMD_BASE; 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("running on the new L1 page table!\n"); 787 printf("done.\n"); 788 #endif 789 790 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 791 792 #ifdef VERBOSE_INIT_ARM 793 printf("\n"); 794 #endif 795 796 /* 797 * Pages were allocated during the secondary bootstrap for the 798 * stacks for different CPU modes. 799 * We must now set the r13 registers in the different CPU modes to 800 * point to these stacks. 801 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 802 * of the stack memory. 803 */ 804 #ifdef VERBOSE_INIT_ARM 805 printf("init subsystems: stacks "); 806 console_flush(); 807 #endif 808 809 set_stackptr(PSR_IRQ32_MODE, 810 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 811 set_stackptr(PSR_ABT32_MODE, 812 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 813 set_stackptr(PSR_UND32_MODE, 814 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 815 #ifdef PMAP_DEBUG 816 if (pmap_debug_level >= 0) 817 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 818 kernelstack.pv_pa); 819 #endif /* PMAP_DEBUG */ 820 821 /* 822 * Well we should set a data abort handler. 823 * Once things get going this will change as we will need a proper 824 * handler. Until then we will use a handler that just panics but 825 * tells us why. 826 * Initialisation of the vectors will just panic on a data abort. 827 * This just fills in a slightly better one. 828 */ 829 #ifdef VERBOSE_INIT_ARM 830 printf("vectors "); 831 #endif 832 data_abort_handler_address = (u_int)data_abort_handler; 833 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 834 undefined_handler_address = (u_int)undefinedinstruction_bounce; 835 console_flush(); 836 837 838 /* 839 * At last ! 840 * We now have the kernel in physical memory from the bottom upwards. 841 * Kernel page tables are physically above this. 842 * The kernel is mapped to 0xf0000000 843 * The kernel data PTs will handle the mapping of 844 * 0xf1000000-0xf5ffffff (80 Mb) 845 * 2Meg of VRAM is mapped to 0xf7000000 846 * The page tables are mapped to 0xefc00000 847 * The IOMD is mapped to 0xf6000000 848 * The VIDC is mapped to 0xf6100000 849 * The IOMD/VIDC could be pushed up higher but i havent got 850 * sufficient documentation to do so; the addresses are not 851 * parametized yet and hard to read... better fix this before; 852 * its pretty unforgiving. 853 */ 854 855 /* Initialise the undefined instruction handlers */ 856 #ifdef VERBOSE_INIT_ARM 857 printf("undefined "); 858 #endif 859 undefined_init(); 860 console_flush(); 861 862 /* Load memory into UVM. */ 863 #ifdef VERBOSE_INIT_ARM 864 printf("page "); 865 #endif 866 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 867 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 868 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 869 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 870 871 if (start < physical_freestart) 872 start = physical_freestart; 873 if (end > physical_freeend) 874 end = physical_freeend; 875 876 /* XXX Consider DMA range intersection checking. */ 877 878 uvm_page_physload(atop(start), atop(end), 879 atop(start), atop(end), VM_FREELIST_DEFAULT); 880 } 881 882 /* Boot strap pmap telling it where the kernel page table is */ 883 #ifdef VERBOSE_INIT_ARM 884 printf("pmap "); 885 #endif 886 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 887 console_flush(); 888 889 /* Setup the IRQ system */ 890 #ifdef VERBOSE_INIT_ARM 891 printf("irq "); 892 #endif 893 console_flush(); 894 irq_init(); 895 #ifdef VERBOSE_INIT_ARM 896 printf("done.\n\n"); 897 #endif 898 899 #if NVIDCVIDEO>0 900 consinit(); /* necessary ? */ 901 #endif 902 903 /* Talk to the user */ 904 printf("NetBSD/evbarm booting ... \n"); 905 906 /* Tell the user if his boot loader is too old */ 907 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 908 (bootconfig.version != BOOTCONFIG_VERSION)) { 909 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 910 delay(5000000); 911 } 912 913 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 914 printf("Kernel arg string (@%p) %s\n", 915 bootconfig.args, bootconfig.args); 916 printf("\nBoot configuration structure reports the following " 917 "memory\n"); 918 919 printf(" DRAM block 0a at %08x size %08x " 920 "DRAM block 0b at %08x size %08x\n\r", 921 bootconfig.dram[0].address, 922 bootconfig.dram[0].pages * bootconfig.pagesize, 923 bootconfig.dram[1].address, 924 bootconfig.dram[1].pages * bootconfig.pagesize); 925 printf(" DRAM block 1a at %08x size %08x " 926 "DRAM block 1b at %08x size %08x\n\r", 927 bootconfig.dram[2].address, 928 bootconfig.dram[2].pages * bootconfig.pagesize, 929 bootconfig.dram[3].address, 930 bootconfig.dram[3].pages * bootconfig.pagesize); 931 printf(" VRAM block 0 at %08x size %08x\n\r", 932 bootconfig.vram[0].address, 933 bootconfig.vram[0].pages * bootconfig.pagesize); 934 935 #if NKSYMS || defined(DDB) || defined(MODULAR) 936 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 937 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 938 #endif 939 940 941 #ifdef DDB 942 db_machine_init(); 943 if (boothowto & RB_KDB) 944 Debugger(); 945 #endif /* DDB */ 946 947 /* We return the new stack pointer address */ 948 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 949 } 950 951 952 static void 953 process_kernel_args(void) 954 { 955 char *args; 956 957 /* Ok now we will check the arguments for interesting parameters. */ 958 args = bootconfig.args; 959 boothowto = 0; 960 961 /* Only arguments itself are passed from the new bootloader */ 962 while (*args == ' ') 963 ++args; 964 965 boot_args = args; 966 parse_mi_bootargs(boot_args); 967 parse_rpc_bootargs(boot_args); 968 } 969 970 971 void 972 parse_rpc_bootargs(char *args) 973 { 974 int integer; 975 976 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 977 &integer)) { 978 videodram_size = integer; 979 /* Round to 4K page */ 980 videodram_size *= 1024; 981 videodram_size = round_page(videodram_size); 982 if (videodram_size > 1024*1024) 983 videodram_size = 1024*1024; 984 } 985 } 986 /* End of machdep.c */ 987
Indexes created Wed Oct 22 13:09:56 GMT 2025