eb7500atx_machdep.c revision 1.6.26.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.6.26.1 2007/08/16 11:02:08 jmcneill Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2002 Reinoud Zandijk. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * RiscBSD kernel project 39 * 40 * machdep.c 41 * 42 * Machine dependant functions for kernel setup 43 * 44 * This file still needs a lot of work 45 * 46 * Created : 17/09/94 47 * Updated for yet another new bootloader 28/12/02 48 */ 49 50 #include "opt_ddb.h" 51 #include "opt_pmap_debug.h" 52 #include "vidcvideo.h" 53 #include "pckbc.h" 54 55 #include <sys/param.h> 56 57 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.6.26.1 2007/08/16 11:02:08 jmcneill Exp $"); 58 59 #include <sys/systm.h> 60 #include <sys/kernel.h> 61 #include <sys/reboot.h> 62 #include <sys/proc.h> 63 #include <sys/msgbuf.h> 64 #include <sys/exec.h> 65 #include <sys/ksyms.h> 66 67 #include <dev/cons.h> 68 69 #include <machine/db_machdep.h> 70 #include <ddb/db_sym.h> 71 #include <ddb/db_extern.h> 72 73 #include <uvm/uvm.h> 74 75 #include <machine/signal.h> 76 #include <machine/frame.h> 77 #include <machine/bootconfig.h> 78 #include <machine/cpu.h> 79 #include <machine/io.h> 80 #include <machine/intr.h> 81 #include <arm/cpuconf.h> 82 #include <arm/arm32/katelib.h> 83 #include <arm/arm32/machdep.h> 84 #include <arm/undefined.h> 85 #include <machine/rtc.h> 86 #include <machine/bus.h> 87 88 #include <arm/iomd/vidc.h> 89 #include <arm/iomd/iomdreg.h> 90 #include <arm/iomd/iomdvar.h> 91 92 #include <arm/iomd/vidcvideo.h> 93 94 #include <sys/device.h> 95 #include <dev/ic/pckbcvar.h> 96 97 #include <dev/i2c/i2cvar.h> 98 #include <dev/i2c/pcf8583var.h> 99 #include <arm/iomd/iomdiicvar.h> 100 101 /* static i2c_tag_t acorn32_i2c_tag;*/ 102 103 #include "opt_ipkdb.h" 104 #include "ksyms.h" 105 106 /* Kernel text starts at the base of the kernel address space. */ 107 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 108 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 109 110 /* 111 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 112 * Fixed mappings exist from 0xf6000000 - 0xffffffff 113 */ 114 #define KERNEL_VM_SIZE 0x05000000 115 116 /* 117 * Address to call from cpu_reset() to reset the machine. 118 * This is machine architecture dependant as it varies depending 119 * on where the ROM appears when you turn the MMU off. 120 */ 121 u_int cpu_reset_address = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */ 122 123 124 #define VERBOSE_INIT_ARM 125 126 127 /* Define various stack sizes in pages */ 128 #define IRQ_STACK_SIZE 1 129 #define ABT_STACK_SIZE 1 130 #ifdef IPKDB 131 #define UND_STACK_SIZE 2 132 #else 133 #define UND_STACK_SIZE 1 134 #endif 135 136 137 struct bootconfig bootconfig; /* Boot config storage */ 138 videomemory_t videomemory; /* Video memory descriptor */ 139 140 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 141 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 142 143 extern int *vidc_base; 144 extern u_int32_t iomd_base; 145 extern struct bus_space iomd_bs_tag; 146 147 paddr_t physical_start; 148 paddr_t physical_freestart; 149 paddr_t physical_freeend; 150 paddr_t physical_end; 151 paddr_t dma_range_begin; 152 paddr_t dma_range_end; 153 154 u_int free_pages; 155 int physmem = 0; 156 paddr_t memoryblock_end; 157 158 #ifndef PMAP_STATIC_L1S 159 int max_processes = 64; /* Default number */ 160 #endif /* !PMAP_STATIC_L1S */ 161 162 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 163 164 /* Physical and virtual addresses for some global pages */ 165 pv_addr_t systempage; 166 pv_addr_t irqstack; 167 pv_addr_t undstack; 168 pv_addr_t abtstack; 169 pv_addr_t kernelstack; 170 171 paddr_t msgbufphys; 172 173 extern u_int data_abort_handler_address; 174 extern u_int prefetch_abort_handler_address; 175 extern u_int undefined_handler_address; 176 177 #ifdef PMAP_DEBUG 178 extern int pmap_debug_level; 179 #endif /* PMAP_DEBUG */ 180 181 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 182 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 183 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 184 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 185 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 186 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 187 188 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 189 190 struct user *proc0paddr; 191 192 #ifdef CPU_SA110 193 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 194 static vaddr_t sa110_cc_base; 195 #endif /* CPU_SA110 */ 196 197 /* Prototypes */ 198 void physcon_display_base(u_int); 199 extern void consinit(void); 200 201 void data_abort_handler(trapframe_t *); 202 void prefetch_abort_handler(trapframe_t *); 203 void undefinedinstruction_bounce(trapframe_t *frame); 204 205 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 206 static void process_kernel_args(void); 207 208 extern void dump_spl_masks(void); 209 210 void rpc_sa110_cc_setup(void); 211 212 void parse_rpc_bootargs(char *args); 213 214 extern void dumpsys(void); 215 216 217 # define console_flush() /* empty */ 218 219 220 #define panic2(a) do { \ 221 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 222 consinit(); \ 223 panic a; \ 224 } while (/* CONSTCOND */ 0) 225 226 /* 227 * void cpu_reboot(int howto, char *bootstr) 228 * 229 * Reboots the system 230 * 231 * Deal with any syncing, unmounting, dumping and shutdown hooks, 232 * then reset the CPU. 233 */ 234 235 /* NOTE: These variables will be removed, well some of them */ 236 237 extern u_int current_mask; 238 239 void 240 cpu_reboot(int howto, char *bootstr) 241 { 242 243 #ifdef DIAGNOSTIC 244 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 245 246 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 247 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 248 irqmasks[IPL_VM]); 249 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 250 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 251 252 /* dump_spl_masks(); */ 253 #endif /* DIAGNOSTIC */ 254 255 /* 256 * If we are still cold then hit the air brakes 257 * and crash to earth fast 258 */ 259 if (cold) { 260 doshutdownhooks(); 261 printf("Halted while still in the ICE age.\n"); 262 printf("The operating system has halted.\n"); 263 printf("Please press any key to reboot.\n\n"); 264 cngetc(); 265 printf("rebooting...\n"); 266 cpu_reset(); 267 /*NOTREACHED*/ 268 } 269 270 /* Disable console buffering */ 271 cnpollc(1); 272 273 /* 274 * If RB_NOSYNC was not specified sync the discs. 275 * Note: Unless cold is set to 1 here, syslogd will die during 276 * the unmount. It looks like syslogd is getting woken up 277 * only to find that it cannot page part of the binary in as 278 * the filesystem has been unmounted. 279 */ 280 if (!(howto & RB_NOSYNC)) 281 bootsync(); 282 283 /* Say NO to interrupts */ 284 splhigh(); 285 286 /* Do a dump if requested. */ 287 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 288 dumpsys(); 289 290 /* 291 * Auto reboot overload protection 292 * 293 * This code stops the kernel entering an endless loop of reboot 294 * - panic cycles. This will have the effect of stopping further 295 * reboots after it has rebooted 8 times after panics. A clean 296 * halt or reboot will reset the counter. 297 */ 298 299 /* Run any shutdown hooks */ 300 doshutdownhooks(); 301 302 /* Make sure IRQ's are disabled */ 303 IRQdisable; 304 305 if (howto & RB_HALT) { 306 printf("The operating system has halted.\n"); 307 printf("Please press any key to reboot.\n\n"); 308 cngetc(); 309 } 310 311 printf("rebooting...\n"); 312 cpu_reset(); 313 /*NOTREACHED*/ 314 } 315 316 317 /* 318 * u_int initarm(BootConfig *bootconf) 319 * 320 * Initial entry point on startup. This gets called before main() is 321 * entered. 322 * It should be responsible for setting up everything that must be 323 * in place when main is called. 324 * This includes 325 * Taking a copy of the boot configuration structure. 326 * Initialising the physical console so characters can be printed. 327 * Setting up page tables for the kernel 328 * Relocating the kernel to the bottom of physical memory 329 */ 330 331 /* 332 * this part is completely rewritten for the new bootloader ... It features 333 * a flat memory map with a mapping comparable to the EBSA arm32 machine 334 * to boost the portability and likeness of the code 335 */ 336 337 /* 338 * Mapping table for core kernel memory. This memory is mapped at init 339 * time with section mappings. 340 * 341 * XXX One big assumption in the current architecture seems that the kernel is 342 * XXX supposed to be mapped into bootconfig.dram[0]. 343 */ 344 345 #define ONE_MB 0x100000 346 347 struct l1_sec_map { 348 vaddr_t va; 349 paddr_t pa; 350 vsize_t size; 351 vm_prot_t prot; 352 int cache; 353 } l1_sec_table[] = { 354 /* Map 1Mb section for VIDC20 */ 355 { VIDC_BASE, VIDC_HW_BASE, 356 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 357 PTE_NOCACHE }, 358 359 /* Map 1Mb section from IOMD */ 360 { IOMD_BASE, IOMD_HW_BASE, 361 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 362 PTE_NOCACHE }, 363 364 /* Map 1Mb of COMBO (and module space) */ 365 { IO_BASE, IO_HW_BASE, 366 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 367 PTE_NOCACHE }, 368 { 0, 0, 0, 0, 0 } 369 }; 370 371 372 static void 373 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 374 { 375 /* check for bootconfig v2+ structure */ 376 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 377 /* v2+ cleaned up structure found */ 378 *bootconf = *raw_bootconf; 379 return; 380 } else { 381 panic2(("Internal error: no valid bootconfig block found")); 382 } 383 } 384 385 386 u_int 387 initarm(void *cookie) 388 { 389 struct bootconfig *raw_bootconf = cookie; 390 int loop; 391 int loop1; 392 u_int logical; 393 u_int kerneldatasize; 394 u_int l1pagetable; 395 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 396 pv_addr_t kernel_l1pt = { {0} }; 397 398 /* 399 * Heads up ... Setup the CPU / MMU / TLB functions 400 */ 401 set_cpufuncs(); 402 403 /* canonicalise the boot configuration structure to alow versioning */ 404 canonicalise_bootconfig(&bootconfig, raw_bootconf); 405 booted_kernel = bootconfig.kernelname; 406 407 /* if the wscons interface is used, switch off VERBOSE booting :( */ 408 #if NVIDCVIDEO>0 409 # undef VERBOSE_INIT_ARM 410 # undef PMAP_DEBUG 411 #endif 412 413 /* 414 * Initialise the video memory descriptor 415 * 416 * Note: all references to the video memory virtual/physical address 417 * should go via this structure. 418 */ 419 420 /* Hardwire it on the place the bootloader tells us */ 421 videomemory.vidm_vbase = bootconfig.display_start; 422 videomemory.vidm_pbase = bootconfig.display_phys; 423 videomemory.vidm_size = bootconfig.display_size; 424 if (bootconfig.vram[0].pages) 425 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 426 else 427 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 428 vidc_base = (int *) VIDC_HW_BASE; 429 iomd_base = IOMD_HW_BASE; 430 431 /* 432 * Initialise the physical console 433 * This is done in main() but for the moment we do it here so that 434 * we can use printf in initarm() before main() has been called. 435 * only for `vidcconsole!' ... not wscons 436 */ 437 #if NVIDCVIDEO == 0 438 consinit(); 439 #endif 440 441 /* 442 * Initialise the diagnostic serial console 443 * This allows a means of generating output during initarm(). 444 * Once all the memory map changes are complete we can call consinit() 445 * and not have to worry about things moving. 446 */ 447 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 448 /* XXX snif .... i am still not able to this */ 449 450 /* 451 * We have the following memory map (derived from EBSA) 452 * 453 * virtual address == physical address apart from the areas: 454 * 0x00000000 -> 0x000fffff which is mapped to 455 * top 1MB of physical memory 456 * 0xf0000000 -> 0xf0ffffff wich is mapped to 457 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 458 * 459 * This means that the kernel is mapped suitably for continuing 460 * execution, all I/O is mapped 1:1 virtual to physical and 461 * physical memory is accessible. 462 * 463 * The initarm() has the responsibility for creating the kernel 464 * page tables. 465 * It must also set up various memory pointers that are used 466 * by pmap etc. 467 */ 468 469 /* START OF REAL NEW STUFF */ 470 471 /* Check to make sure the page size is correct */ 472 if (PAGE_SIZE != bootconfig.pagesize) 473 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 474 bootconfig.pagesize, PAGE_SIZE)); 475 476 /* process arguments */ 477 process_kernel_args(); 478 479 480 /* 481 * Now set up the page tables for the kernel ... this part is copied 482 * in a (modified?) way from the EBSA machine port.... 483 */ 484 485 #ifdef VERBOSE_INIT_ARM 486 printf("Allocating page tables\n"); 487 #endif 488 /* 489 * Set up the variables that define the availablilty of physical 490 * memory 491 */ 492 physical_start = 0xffffffff; 493 physical_end = 0; 494 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 495 if (bootconfig.dram[loop].address < physical_start) 496 physical_start = bootconfig.dram[loop].address; 497 memoryblock_end = bootconfig.dram[loop].address + 498 bootconfig.dram[loop].pages * PAGE_SIZE; 499 if (memoryblock_end > physical_end) 500 physical_end = memoryblock_end; 501 physmem += bootconfig.dram[loop].pages; 502 }; 503 /* constants for now, but might be changed/configured */ 504 dma_range_begin = (paddr_t) physical_start; 505 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 506 /* XXX HACK HACK XXX */ 507 /* dma_range_end = 0x18000000; */ 508 509 if (physical_start != bootconfig.dram[0].address) { 510 int oldblocks = 0; 511 512 /* 513 * must be a kinetic, as it's the only thing to shuffle memory 514 * around 515 */ 516 /* hack hack - throw away the slow dram */ 517 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 518 if (bootconfig.dram[loop].address < 519 bootconfig.dram[0].address) { 520 /* non kinetic ram */ 521 bootconfig.dram[loop].address = 0; 522 physmem -= bootconfig.dram[loop].pages; 523 bootconfig.drampages -= 524 bootconfig.dram[loop].pages; 525 bootconfig.dram[loop].pages = 0; 526 oldblocks++; 527 } 528 } 529 physical_start = bootconfig.dram[0].address; 530 bootconfig.dramblocks -= oldblocks; 531 } 532 533 physical_freestart = physical_start; 534 free_pages = bootconfig.drampages; 535 physical_freeend = physical_end; 536 537 538 /* 539 * AHUM !! set this variable ... it was set up in the old 1st 540 * stage bootloader 541 */ 542 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 543 544 /* Update the address of the first free page of physical memory */ 545 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 546 physical_freestart += 547 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 548 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 549 550 /* Define a macro to simplify memory allocation */ 551 #define valloc_pages(var, np) \ 552 alloc_pages((var).pv_pa, (np)); \ 553 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 554 555 #define alloc_pages(var, np) \ 556 (var) = physical_freestart; \ 557 physical_freestart += ((np) * PAGE_SIZE); \ 558 free_pages -= (np); \ 559 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 560 561 loop1 = 0; 562 kernel_l1pt.pv_pa = 0; 563 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 564 /* Are we 16KB aligned for an L1 ? */ 565 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 566 && kernel_l1pt.pv_pa == 0) { 567 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 568 } else { 569 valloc_pages(kernel_pt_table[loop1], 570 L2_TABLE_SIZE / PAGE_SIZE); 571 ++loop1; 572 } 573 } 574 575 576 #ifdef DIAGNOSTIC 577 /* This should never be able to happen but better confirm that. */ 578 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 579 panic2(("initarm: Failed to align the kernel page " 580 "directory\n")); 581 #endif 582 583 /* 584 * Allocate a page for the system page mapped to V0x00000000 585 * This page will just contain the system vectors and can be 586 * shared by all processes. 587 */ 588 alloc_pages(systempage.pv_pa, 1); 589 590 /* Allocate stacks for all modes */ 591 valloc_pages(irqstack, IRQ_STACK_SIZE); 592 valloc_pages(abtstack, ABT_STACK_SIZE); 593 valloc_pages(undstack, UND_STACK_SIZE); 594 valloc_pages(kernelstack, UPAGES); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("Setting up stacks :\n"); 598 printf("IRQ stack: p0x%08lx v0x%08lx\n", 599 irqstack.pv_pa, irqstack.pv_va); 600 printf("ABT stack: p0x%08lx v0x%08lx\n", 601 abtstack.pv_pa, abtstack.pv_va); 602 printf("UND stack: p0x%08lx v0x%08lx\n", 603 undstack.pv_pa, undstack.pv_va); 604 printf("SVC stack: p0x%08lx v0x%08lx\n", 605 kernelstack.pv_pa, kernelstack.pv_va); 606 printf("\n"); 607 #endif 608 609 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 610 611 #ifdef CPU_SA110 612 /* 613 * XXX totally stuffed hack to work round problems introduced 614 * in recent versions of the pmap code. Due to the calls used there 615 * we cannot allocate virtual memory during bootstrap. 616 */ 617 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 618 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 619 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 620 #endif /* CPU_SA110 */ 621 622 /* 623 * Ok we have allocated physical pages for the primary kernel 624 * page tables 625 */ 626 627 #ifdef VERBOSE_INIT_ARM 628 printf("Creating L1 page table\n"); 629 #endif 630 631 /* 632 * Now we start construction of the L1 page table 633 * We start by mapping the L2 page tables into the L1. 634 * This means that we can replace L1 mappings later on if necessary 635 */ 636 l1pagetable = kernel_l1pt.pv_pa; 637 638 /* Map the L2 pages tables in the L1 page table */ 639 pmap_link_l2pt(l1pagetable, 0x00000000, 640 &kernel_pt_table[KERNEL_PT_SYS]); 641 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 642 &kernel_pt_table[KERNEL_PT_KERNEL]); 643 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 644 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 645 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 646 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 647 &kernel_pt_table[KERNEL_PT_VMEM]); 648 649 /* update the top of the kernel VM */ 650 pmap_curmaxkvaddr = 651 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 652 653 #ifdef VERBOSE_INIT_ARM 654 printf("Mapping kernel\n"); 655 #endif 656 657 /* Now we fill in the L2 pagetable for the kernel code/data */ 658 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 659 /* 660 * The defines are a workaround for a recent problem that occurred 661 * with ARM 610 processors and some ARM 710 processors 662 * Other ARM 710 and StrongARM processors don't have a problem. 663 */ 664 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 665 #if defined(CPU_ARM6) || defined(CPU_ARM7) 666 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 667 physical_start, kernexec->a_text, 668 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 669 #else /* CPU_ARM6 || CPU_ARM7 */ 670 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 671 physical_start, kernexec->a_text, 672 VM_PROT_READ, PTE_CACHE); 673 #endif /* CPU_ARM6 || CPU_ARM7 */ 674 logical += pmap_map_chunk(l1pagetable, 675 KERNEL_TEXT_BASE + logical, physical_start + logical, 676 kerneldatasize - kernexec->a_text, 677 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 } else { /* !ZMAGIC */ 679 /* 680 * Most likely an ELF kernel ... 681 * XXX no distinction yet between read only and 682 * read/write area's ... 683 */ 684 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 685 physical_start, kerneldatasize, 686 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 687 }; 688 689 690 #ifdef VERBOSE_INIT_ARM 691 printf("Constructing L2 page tables\n"); 692 #endif 693 694 /* Map the stack pages */ 695 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 696 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 697 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 698 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 700 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 702 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 703 704 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 705 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 706 707 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 708 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 709 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 710 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 711 } 712 713 /* Now we fill in the L2 pagetable for the VRAM */ 714 /* 715 * Current architectures mean that the VRAM is always in 1 716 * continuous bank. This means that we can just map the 2 meg 717 * that the VRAM would occupy. In theory we don't need a page 718 * table for VRAM, we could section map it but we would need 719 * the page tables if DRAM was in use. 720 * XXX please map two adjacent virtual areas to ONE physical 721 * area 722 */ 723 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 724 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 725 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 726 videomemory.vidm_pbase, videomemory.vidm_size, 727 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 728 729 /* Map the vector page. */ 730 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 731 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 732 733 /* Map the core memory needed before autoconfig */ 734 loop = 0; 735 while (l1_sec_table[loop].size) { 736 vm_size_t sz; 737 738 #ifdef VERBOSE_INIT_ARM 739 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 740 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 741 l1_sec_table[loop].va); 742 #endif 743 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 744 pmap_map_section(l1pagetable, 745 l1_sec_table[loop].va + sz, 746 l1_sec_table[loop].pa + sz, 747 l1_sec_table[loop].prot, 748 l1_sec_table[loop].cache); 749 ++loop; 750 } 751 752 /* 753 * Now we have the real page tables in place so we can switch 754 * to them. Once this is done we will be running with the 755 * REAL kernel page tables. 756 */ 757 758 /* Switch tables */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("switching to new L1 page table\n"); 761 #endif 762 #ifdef VERBOSE_INIT_ARM 763 printf("switching domains\n"); 764 #endif 765 /* be a client to all domains */ 766 cpu_domains(0x55555555); 767 768 setttb(kernel_l1pt.pv_pa); 769 770 /* 771 * We must now clean the cache again.... 772 * Cleaning may be done by reading new data to displace any 773 * dirty data in the cache. This will have happened in setttb() 774 * but since we are boot strapping the addresses used for the read 775 * may have just been remapped and thus the cache could be out 776 * of sync. A re-clean after the switch will cure this. 777 * After booting there are no gross reloations of the kernel thus 778 * this problem will not occur after initarm(). 779 */ 780 cpu_idcache_wbinv_all(); 781 cpu_tlb_flushID(); 782 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 783 784 /* 785 * Moved from cpu_startup() as data_abort_handler() references 786 * this during uvm init 787 */ 788 proc0paddr = (struct user *)kernelstack.pv_va; 789 lwp0.l_addr = proc0paddr; 790 791 /* 792 * if there is support for a serial console ...we should now 793 * reattach it 794 */ 795 /* fcomcndetach();*/ 796 797 /* 798 * Reflect videomemory relocation in the videomemory structure 799 * and reinit console 800 */ 801 if (bootconfig.vram[0].pages == 0) { 802 videomemory.vidm_vbase = VMEM_VBASE; 803 } else { 804 videomemory.vidm_vbase = VMEM_VBASE; 805 bootconfig.display_start = VMEM_VBASE; 806 }; 807 vidc_base = (int *) VIDC_BASE; 808 iomd_base = IOMD_BASE; 809 810 #ifdef VERBOSE_INIT_ARM 811 printf("running on the new L1 page table!\n"); 812 printf("done.\n"); 813 #endif 814 815 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 816 817 #ifdef VERBOSE_INIT_ARM 818 printf("\n"); 819 #endif 820 821 /* 822 * Pages were allocated during the secondary bootstrap for the 823 * stacks for different CPU modes. 824 * We must now set the r13 registers in the different CPU modes to 825 * point to these stacks. 826 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 827 * of the stack memory. 828 */ 829 #ifdef VERBOSE_INIT_ARM 830 printf("init subsystems: stacks "); 831 console_flush(); 832 #endif 833 834 set_stackptr(PSR_IRQ32_MODE, 835 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 836 set_stackptr(PSR_ABT32_MODE, 837 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 838 set_stackptr(PSR_UND32_MODE, 839 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 840 #ifdef PMAP_DEBUG 841 if (pmap_debug_level >= 0) 842 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 843 kernelstack.pv_pa); 844 #endif /* PMAP_DEBUG */ 845 846 /* 847 * Well we should set a data abort handler. 848 * Once things get going this will change as we will need a proper 849 * handler. Until then we will use a handler that just panics but 850 * tells us why. 851 * Initialisation of the vectors will just panic on a data abort. 852 * This just fills in a slightly better one. 853 */ 854 #ifdef VERBOSE_INIT_ARM 855 printf("vectors "); 856 #endif 857 data_abort_handler_address = (u_int)data_abort_handler; 858 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 859 undefined_handler_address = (u_int)undefinedinstruction_bounce; 860 console_flush(); 861 862 863 /* 864 * At last ! 865 * We now have the kernel in physical memory from the bottom upwards. 866 * Kernel page tables are physically above this. 867 * The kernel is mapped to 0xf0000000 868 * The kernel data PTs will handle the mapping of 869 * 0xf1000000-0xf5ffffff (80 Mb) 870 * 2Meg of VRAM is mapped to 0xf7000000 871 * The page tables are mapped to 0xefc00000 872 * The IOMD is mapped to 0xf6000000 873 * The VIDC is mapped to 0xf6100000 874 * The IOMD/VIDC could be pushed up higher but i havent got 875 * sufficient documentation to do so; the addresses are not 876 * parametized yet and hard to read... better fix this before; 877 * its pretty unforgiving. 878 */ 879 880 /* Initialise the undefined instruction handlers */ 881 #ifdef VERBOSE_INIT_ARM 882 printf("undefined "); 883 #endif 884 undefined_init(); 885 console_flush(); 886 887 /* Load memory into UVM. */ 888 #ifdef VERBOSE_INIT_ARM 889 printf("page "); 890 #endif 891 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 892 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 893 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 894 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 895 896 if (start < physical_freestart) 897 start = physical_freestart; 898 if (end > physical_freeend) 899 end = physical_freeend; 900 901 /* XXX Consider DMA range intersection checking. */ 902 903 uvm_page_physload(atop(start), atop(end), 904 atop(start), atop(end), VM_FREELIST_DEFAULT); 905 } 906 907 /* Boot strap pmap telling it where the kernel page table is */ 908 #ifdef VERBOSE_INIT_ARM 909 printf("pmap "); 910 #endif 911 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 912 KERNEL_VM_BASE + KERNEL_VM_SIZE); 913 console_flush(); 914 915 /* Setup the IRQ system */ 916 #ifdef VERBOSE_INIT_ARM 917 printf("irq "); 918 #endif 919 console_flush(); 920 irq_init(); 921 #ifdef VERBOSE_INIT_ARM 922 printf("done.\n\n"); 923 #endif 924 925 #if NVIDCVIDEO>0 926 consinit(); /* necessary ? */ 927 #endif 928 929 /* Talk to the user */ 930 printf("NetBSD/evbarm booting ... \n"); 931 932 /* Tell the user if his boot loader is too old */ 933 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 934 (bootconfig.version != BOOTCONFIG_VERSION)) { 935 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 936 delay(5000000); 937 } 938 939 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 940 printf("Kernel arg string (@%p) %s\n", 941 bootconfig.args, bootconfig.args); 942 printf("\nBoot configuration structure reports the following " 943 "memory\n"); 944 945 printf(" DRAM block 0a at %08x size %08x " 946 "DRAM block 0b at %08x size %08x\n\r", 947 bootconfig.dram[0].address, 948 bootconfig.dram[0].pages * bootconfig.pagesize, 949 bootconfig.dram[1].address, 950 bootconfig.dram[1].pages * bootconfig.pagesize); 951 printf(" DRAM block 1a at %08x size %08x " 952 "DRAM block 1b at %08x size %08x\n\r", 953 bootconfig.dram[2].address, 954 bootconfig.dram[2].pages * bootconfig.pagesize, 955 bootconfig.dram[3].address, 956 bootconfig.dram[3].pages * bootconfig.pagesize); 957 printf(" VRAM block 0 at %08x size %08x\n\r", 958 bootconfig.vram[0].address, 959 bootconfig.vram[0].pages * bootconfig.pagesize); 960 961 #ifdef IPKDB 962 /* Initialise ipkdb */ 963 ipkdb_init(); 964 if (boothowto & RB_KDB) 965 ipkdb_connect(0); 966 #endif /* NIPKDB */ 967 968 #if NKSYMS || defined(DDB) || defined(LKM) 969 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 970 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 971 #endif 972 973 974 #ifdef DDB 975 db_machine_init(); 976 if (boothowto & RB_KDB) 977 Debugger(); 978 #endif /* DDB */ 979 980 /* We return the new stack pointer address */ 981 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 982 } 983 984 985 static void 986 process_kernel_args(void) 987 { 988 char *args; 989 990 /* Ok now we will check the arguments for interesting parameters. */ 991 args = bootconfig.args; 992 boothowto = 0; 993 994 /* Only arguments itself are passed from the new bootloader */ 995 while (*args == ' ') 996 ++args; 997 998 boot_args = args; 999 parse_mi_bootargs(boot_args); 1000 parse_rpc_bootargs(boot_args); 1001 } 1002 1003 1004 void 1005 parse_rpc_bootargs(char *args) 1006 { 1007 int integer; 1008 1009 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 1010 &integer)) { 1011 videodram_size = integer; 1012 /* Round to 4K page */ 1013 videodram_size *= 1024; 1014 videodram_size = round_page(videodram_size); 1015 if (videodram_size > 1024*1024) 1016 videodram_size = 1024*1024; 1017 } 1018 } 1019 /* End of machdep.c */ 1020
Indexes created Wed Oct 22 13:09:56 GMT 2025