eb7500atx_machdep.c revision 1.1.4.5
1 /* $NetBSD: eb7500atx_machdep.c,v 1.1.4.5 2004/12/18 09:31:00 skrll 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 "rpckbd.h" 54 #include "pckbc.h" 55 56 #include <sys/param.h> 57 58 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.1.4.5 2004/12/18 09:31:00 skrll Exp $"); 59 60 #include <sys/systm.h> 61 #include <sys/kernel.h> 62 #include <sys/reboot.h> 63 #include <sys/proc.h> 64 #include <sys/msgbuf.h> 65 #include <sys/exec.h> 66 #include <sys/ksyms.h> 67 68 #include <dev/cons.h> 69 70 #include <machine/db_machdep.h> 71 #include <ddb/db_sym.h> 72 #include <ddb/db_extern.h> 73 74 #include <uvm/uvm.h> 75 76 #include <machine/signal.h> 77 #include <machine/frame.h> 78 #include <machine/bootconfig.h> 79 #include <machine/cpu.h> 80 #include <machine/io.h> 81 #include <machine/intr.h> 82 #include <arm/cpuconf.h> 83 #include <arm/arm32/katelib.h> 84 #include <arm/arm32/machdep.h> 85 #include <machine/vconsole.h> 86 #include <arm/undefined.h> 87 #include <machine/rtc.h> 88 #include <machine/bus.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 <arm/iomd/rpckbdvar.h> 98 #include <dev/ic/pckbcvar.h> 99 100 #include <dev/i2c/i2cvar.h> 101 #include <dev/i2c/pcf8583var.h> 102 #include <arm/iomd/iomdiicvar.h> 103 104 /* static i2c_tag_t acorn32_i2c_tag;*/ 105 106 #include "opt_ipkdb.h" 107 #include "ksyms.h" 108 109 /* Kernel text starts at the base of the kernel address space. */ 110 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 111 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 112 113 /* 114 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 115 * Fixed mappings exist from 0xf6000000 - 0xffffffff 116 */ 117 #define KERNEL_VM_SIZE 0x05000000 118 119 /* 120 * Address to call from cpu_reset() to reset the machine. 121 * This is machine architecture dependant as it varies depending 122 * on where the ROM appears when you turn the MMU off. 123 */ 124 u_int cpu_reset_address = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */ 125 126 127 #define VERBOSE_INIT_ARM 128 129 130 /* Define various stack sizes in pages */ 131 #define IRQ_STACK_SIZE 1 132 #define ABT_STACK_SIZE 1 133 #ifdef IPKDB 134 #define UND_STACK_SIZE 2 135 #else 136 #define UND_STACK_SIZE 1 137 #endif 138 139 140 struct bootconfig bootconfig; /* Boot config storage */ 141 videomemory_t videomemory; /* Video memory descriptor */ 142 143 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 144 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 145 146 extern int *vidc_base; 147 extern u_int32_t iomd_base; 148 extern struct bus_space iomd_bs_tag; 149 150 paddr_t physical_start; 151 paddr_t physical_freestart; 152 paddr_t physical_freeend; 153 paddr_t physical_end; 154 paddr_t dma_range_begin; 155 paddr_t dma_range_end; 156 157 u_int free_pages; 158 int physmem = 0; 159 paddr_t memoryblock_end; 160 161 #ifndef PMAP_STATIC_L1S 162 int max_processes = 64; /* Default number */ 163 #endif /* !PMAP_STATIC_L1S */ 164 165 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 166 167 /* Physical and virtual addresses for some global pages */ 168 pv_addr_t systempage; 169 pv_addr_t irqstack; 170 pv_addr_t undstack; 171 pv_addr_t abtstack; 172 pv_addr_t kernelstack; 173 174 paddr_t msgbufphys; 175 176 extern u_int data_abort_handler_address; 177 extern u_int prefetch_abort_handler_address; 178 extern u_int undefined_handler_address; 179 180 #ifdef PMAP_DEBUG 181 extern int pmap_debug_level; 182 #endif /* PMAP_DEBUG */ 183 184 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 185 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 186 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 187 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 188 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 189 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 190 191 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 192 193 struct user *proc0paddr; 194 195 #ifdef CPU_SA110 196 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 197 static vaddr_t sa110_cc_base; 198 #endif /* CPU_SA110 */ 199 200 /* Prototypes */ 201 void physcon_display_base(u_int); 202 extern void consinit(void); 203 204 void data_abort_handler(trapframe_t *); 205 void prefetch_abort_handler(trapframe_t *); 206 void undefinedinstruction_bounce(trapframe_t *frame); 207 208 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 209 static void process_kernel_args(void); 210 211 extern void dump_spl_masks(void); 212 extern void vidcrender_reinit(void); 213 extern int vidcrender_blank(struct vconsole *, int); 214 215 void rpc_sa110_cc_setup(void); 216 217 extern void parse_mi_bootargs(char *args); 218 void parse_rpc_bootargs(char *args); 219 220 extern void dumpsys(void); 221 222 223 #if NVIDCVIDEO > 0 224 # define console_flush() /* empty */ 225 #else 226 extern void console_flush(void); 227 #endif 228 229 230 #define panic2(a) do { \ 231 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 232 consinit(); \ 233 panic a; \ 234 } while (/* CONSTCOND */ 0) 235 236 /* 237 * void cpu_reboot(int howto, char *bootstr) 238 * 239 * Reboots the system 240 * 241 * Deal with any syncing, unmounting, dumping and shutdown hooks, 242 * then reset the CPU. 243 */ 244 245 /* NOTE: These variables will be removed, well some of them */ 246 247 extern u_int spl_mask; 248 extern u_int current_mask; 249 250 void 251 cpu_reboot(int howto, char *bootstr) 252 { 253 254 #ifdef DIAGNOSTIC 255 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 256 257 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 258 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 259 irqmasks[IPL_VM]); 260 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 261 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 262 263 /* dump_spl_masks(); */ 264 #endif /* DIAGNOSTIC */ 265 266 /* 267 * If we are still cold then hit the air brakes 268 * and crash to earth fast 269 */ 270 if (cold) { 271 doshutdownhooks(); 272 printf("Halted while still in the ICE age.\n"); 273 printf("The operating system has halted.\n"); 274 printf("Please press any key to reboot.\n\n"); 275 cngetc(); 276 printf("rebooting...\n"); 277 cpu_reset(); 278 /*NOTREACHED*/ 279 } 280 281 /* Disable console buffering */ 282 cnpollc(1); 283 284 /* 285 * If RB_NOSYNC was not specified sync the discs. 286 * Note: Unless cold is set to 1 here, syslogd will die during 287 * the unmount. It looks like syslogd is getting woken up 288 * only to find that it cannot page part of the binary in as 289 * the filesystem has been unmounted. 290 */ 291 if (!(howto & RB_NOSYNC)) 292 bootsync(); 293 294 /* Say NO to interrupts */ 295 splhigh(); 296 297 /* Do a dump if requested. */ 298 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 299 dumpsys(); 300 301 /* 302 * Auto reboot overload protection 303 * 304 * This code stops the kernel entering an endless loop of reboot 305 * - panic cycles. This will have the effect of stopping further 306 * reboots after it has rebooted 8 times after panics. A clean 307 * halt or reboot will reset the counter. 308 */ 309 310 /* Run any shutdown hooks */ 311 doshutdownhooks(); 312 313 /* Make sure IRQ's are disabled */ 314 IRQdisable; 315 316 if (howto & RB_HALT) { 317 printf("The operating system has halted.\n"); 318 printf("Please press any key to reboot.\n\n"); 319 cngetc(); 320 } 321 322 printf("rebooting...\n"); 323 cpu_reset(); 324 /*NOTREACHED*/ 325 } 326 327 328 /* 329 * u_int initarm(BootConfig *bootconf) 330 * 331 * Initial entry point on startup. This gets called before main() is 332 * entered. 333 * It should be responsible for setting up everything that must be 334 * in place when main is called. 335 * This includes 336 * Taking a copy of the boot configuration structure. 337 * Initialising the physical console so characters can be printed. 338 * Setting up page tables for the kernel 339 * Relocating the kernel to the bottom of physical memory 340 */ 341 342 /* 343 * this part is completely rewritten for the new bootloader ... It features 344 * a flat memory map with a mapping comparable to the EBSA arm32 machine 345 * to boost the portability and likeness of the code 346 */ 347 348 /* 349 * Mapping table for core kernel memory. This memory is mapped at init 350 * time with section mappings. 351 * 352 * XXX One big assumption in the current architecture seems that the kernel is 353 * XXX supposed to be mapped into bootconfig.dram[0]. 354 */ 355 356 #define ONE_MB 0x100000 357 358 struct l1_sec_map { 359 vaddr_t va; 360 paddr_t pa; 361 vsize_t size; 362 vm_prot_t prot; 363 int cache; 364 } l1_sec_table[] = { 365 /* Map 1Mb section for VIDC20 */ 366 { VIDC_BASE, VIDC_HW_BASE, 367 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 368 PTE_NOCACHE }, 369 370 /* Map 1Mb section from IOMD */ 371 { IOMD_BASE, IOMD_HW_BASE, 372 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 373 PTE_NOCACHE }, 374 375 /* Map 1Mb of COMBO (and module space) */ 376 { IO_BASE, IO_HW_BASE, 377 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 378 PTE_NOCACHE }, 379 { 0, 0, 0, 0, 0 } 380 }; 381 382 383 static void 384 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 385 { 386 /* check for bootconfig v2+ structure */ 387 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 388 /* v2+ cleaned up structure found */ 389 *bootconf = *raw_bootconf; 390 return; 391 } else { 392 panic2(("Internal error: no valid bootconfig block found")); 393 } 394 } 395 396 397 u_int 398 initarm(void *cookie) 399 { 400 struct bootconfig *raw_bootconf = cookie; 401 int loop; 402 int loop1; 403 u_int logical; 404 u_int kerneldatasize; 405 u_int l1pagetable; 406 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 407 pv_addr_t kernel_l1pt; 408 409 /* 410 * Heads up ... Setup the CPU / MMU / TLB functions 411 */ 412 set_cpufuncs(); 413 414 /* canonicalise the boot configuration structure to alow versioning */ 415 canonicalise_bootconfig(&bootconfig, raw_bootconf); 416 booted_kernel = bootconfig.kernelname; 417 418 /* if the wscons interface is used, switch off VERBOSE booting :( */ 419 #if NVIDCVIDEO>0 420 # undef VERBOSE_INIT_ARM 421 # undef PMAP_DEBUG 422 #endif 423 424 /* 425 * Initialise the video memory descriptor 426 * 427 * Note: all references to the video memory virtual/physical address 428 * should go via this structure. 429 */ 430 431 /* Hardwire it on the place the bootloader tells us */ 432 videomemory.vidm_vbase = bootconfig.display_start; 433 videomemory.vidm_pbase = bootconfig.display_phys; 434 videomemory.vidm_size = bootconfig.display_size; 435 if (bootconfig.vram[0].pages) 436 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 437 else 438 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 439 vidc_base = (int *) VIDC_HW_BASE; 440 iomd_base = IOMD_HW_BASE; 441 442 /* 443 * Initialise the physical console 444 * This is done in main() but for the moment we do it here so that 445 * we can use printf in initarm() before main() has been called. 446 * only for `vidcconsole!' ... not wscons 447 */ 448 #if NVIDCVIDEO == 0 449 consinit(); 450 #endif 451 452 /* 453 * Initialise the diagnostic serial console 454 * This allows a means of generating output during initarm(). 455 * Once all the memory map changes are complete we can call consinit() 456 * and not have to worry about things moving. 457 */ 458 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 459 /* XXX snif .... i am still not able to this */ 460 461 /* 462 * We have the following memory map (derived from EBSA) 463 * 464 * virtual address == physical address apart from the areas: 465 * 0x00000000 -> 0x000fffff which is mapped to 466 * top 1MB of physical memory 467 * 0xf0000000 -> 0xf0ffffff wich is mapped to 468 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 469 * 470 * This means that the kernel is mapped suitably for continuing 471 * execution, all I/O is mapped 1:1 virtual to physical and 472 * physical memory is accessible. 473 * 474 * The initarm() has the responsibility for creating the kernel 475 * page tables. 476 * It must also set up various memory pointers that are used 477 * by pmap etc. 478 */ 479 480 /* START OF REAL NEW STUFF */ 481 482 /* Check to make sure the page size is correct */ 483 if (PAGE_SIZE != bootconfig.pagesize) 484 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 485 bootconfig.pagesize, PAGE_SIZE)); 486 487 /* process arguments */ 488 process_kernel_args(); 489 490 491 /* 492 * Now set up the page tables for the kernel ... this part is copied 493 * in a (modified?) way from the EBSA machine port.... 494 */ 495 496 #ifdef VERBOSE_INIT_ARM 497 printf("Allocating page tables\n"); 498 #endif 499 /* 500 * Set up the variables that define the availablilty of physical 501 * memory 502 */ 503 physical_start = 0xffffffff; 504 physical_end = 0; 505 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 506 if (bootconfig.dram[loop].address < physical_start) 507 physical_start = bootconfig.dram[loop].address; 508 memoryblock_end = bootconfig.dram[loop].address + 509 bootconfig.dram[loop].pages * PAGE_SIZE; 510 if (memoryblock_end > physical_end) 511 physical_end = memoryblock_end; 512 physmem += bootconfig.dram[loop].pages; 513 }; 514 /* constants for now, but might be changed/configured */ 515 dma_range_begin = (paddr_t) physical_start; 516 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 517 /* XXX HACK HACK XXX */ 518 /* dma_range_end = 0x18000000; */ 519 520 if (physical_start != bootconfig.dram[0].address) { 521 int oldblocks = 0; 522 523 /* 524 * must be a kinetic, as it's the only thing to shuffle memory 525 * around 526 */ 527 /* hack hack - throw away the slow dram */ 528 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 529 if (bootconfig.dram[loop].address < 530 bootconfig.dram[0].address) { 531 /* non kinetic ram */ 532 bootconfig.dram[loop].address = 0; 533 physmem -= bootconfig.dram[loop].pages; 534 bootconfig.drampages -= 535 bootconfig.dram[loop].pages; 536 bootconfig.dram[loop].pages = 0; 537 oldblocks++; 538 } 539 } 540 physical_start = bootconfig.dram[0].address; 541 bootconfig.dramblocks -= oldblocks; 542 } 543 544 physical_freestart = physical_start; 545 free_pages = bootconfig.drampages; 546 physical_freeend = physical_end; 547 548 549 /* 550 * AHUM !! set this variable ... it was set up in the old 1st 551 * stage bootloader 552 */ 553 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 554 555 /* Update the address of the first free page of physical memory */ 556 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 557 physical_freestart += 558 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 559 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 560 561 /* Define a macro to simplify memory allocation */ 562 #define valloc_pages(var, np) \ 563 alloc_pages((var).pv_pa, (np)); \ 564 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 565 566 #define alloc_pages(var, np) \ 567 (var) = physical_freestart; \ 568 physical_freestart += ((np) * PAGE_SIZE); \ 569 free_pages -= (np); \ 570 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 571 572 loop1 = 0; 573 kernel_l1pt.pv_pa = 0; 574 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 575 /* Are we 16KB aligned for an L1 ? */ 576 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 577 && kernel_l1pt.pv_pa == 0) { 578 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 579 } else { 580 valloc_pages(kernel_pt_table[loop1], 581 L2_TABLE_SIZE / PAGE_SIZE); 582 ++loop1; 583 } 584 } 585 586 587 #ifdef DIAGNOSTIC 588 /* This should never be able to happen but better confirm that. */ 589 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 590 panic2(("initarm: Failed to align the kernel page " 591 "directory\n")); 592 #endif 593 594 /* 595 * Allocate a page for the system page mapped to V0x00000000 596 * This page will just contain the system vectors and can be 597 * shared by all processes. 598 */ 599 alloc_pages(systempage.pv_pa, 1); 600 601 /* Allocate stacks for all modes */ 602 valloc_pages(irqstack, IRQ_STACK_SIZE); 603 valloc_pages(abtstack, ABT_STACK_SIZE); 604 valloc_pages(undstack, UND_STACK_SIZE); 605 valloc_pages(kernelstack, UPAGES); 606 607 #ifdef VERBOSE_INIT_ARM 608 printf("Setting up stacks :\n"); 609 printf("IRQ stack: p0x%08lx v0x%08lx\n", 610 irqstack.pv_pa, irqstack.pv_va); 611 printf("ABT stack: p0x%08lx v0x%08lx\n", 612 abtstack.pv_pa, abtstack.pv_va); 613 printf("UND stack: p0x%08lx v0x%08lx\n", 614 undstack.pv_pa, undstack.pv_va); 615 printf("SVC stack: p0x%08lx v0x%08lx\n", 616 kernelstack.pv_pa, kernelstack.pv_va); 617 printf("\n"); 618 #endif 619 620 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 621 622 #ifdef CPU_SA110 623 /* 624 * XXX totally stuffed hack to work round problems introduced 625 * in recent versions of the pmap code. Due to the calls used there 626 * we cannot allocate virtual memory during bootstrap. 627 */ 628 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 629 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 630 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 631 #endif /* CPU_SA110 */ 632 633 /* 634 * Ok we have allocated physical pages for the primary kernel 635 * page tables 636 */ 637 638 #ifdef VERBOSE_INIT_ARM 639 printf("Creating L1 page table\n"); 640 #endif 641 642 /* 643 * Now we start construction of the L1 page table 644 * We start by mapping the L2 page tables into the L1. 645 * This means that we can replace L1 mappings later on if necessary 646 */ 647 l1pagetable = kernel_l1pt.pv_pa; 648 649 /* Map the L2 pages tables in the L1 page table */ 650 pmap_link_l2pt(l1pagetable, 0x00000000, 651 &kernel_pt_table[KERNEL_PT_SYS]); 652 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 653 &kernel_pt_table[KERNEL_PT_KERNEL]); 654 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 655 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 656 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 657 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 658 &kernel_pt_table[KERNEL_PT_VMEM]); 659 660 /* update the top of the kernel VM */ 661 pmap_curmaxkvaddr = 662 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 663 664 #ifdef VERBOSE_INIT_ARM 665 printf("Mapping kernel\n"); 666 #endif 667 668 /* Now we fill in the L2 pagetable for the kernel code/data */ 669 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 670 /* 671 * The defines are a workaround for a recent problem that occurred 672 * with ARM 610 processors and some ARM 710 processors 673 * Other ARM 710 and StrongARM processors don't have a problem. 674 */ 675 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 676 #if defined(CPU_ARM6) || defined(CPU_ARM7) 677 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 678 physical_start, kernexec->a_text, 679 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 #else /* CPU_ARM6 || CPU_ARM7 */ 681 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 682 physical_start, kernexec->a_text, 683 VM_PROT_READ, PTE_CACHE); 684 #endif /* CPU_ARM6 || CPU_ARM7 */ 685 logical += pmap_map_chunk(l1pagetable, 686 KERNEL_TEXT_BASE + logical, physical_start + logical, 687 kerneldatasize - kernexec->a_text, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 689 } else { /* !ZMAGIC */ 690 /* 691 * Most likely an ELF kernel ... 692 * XXX no distinction yet between read only and 693 * read/write area's ... 694 */ 695 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 696 physical_start, kerneldatasize, 697 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 }; 699 700 701 #ifdef VERBOSE_INIT_ARM 702 printf("Constructing L2 page tables\n"); 703 #endif 704 705 /* Map the stack pages */ 706 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 707 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 708 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 709 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 710 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 711 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 712 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 713 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 714 715 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 716 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 717 718 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 719 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 720 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 721 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 722 } 723 724 /* Now we fill in the L2 pagetable for the VRAM */ 725 /* 726 * Current architectures mean that the VRAM is always in 1 727 * continuous bank. This means that we can just map the 2 meg 728 * that the VRAM would occupy. In theory we don't need a page 729 * table for VRAM, we could section map it but we would need 730 * the page tables if DRAM was in use. 731 * XXX please map two adjacent virtual areas to ONE physical 732 * area 733 */ 734 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 735 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 736 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 737 videomemory.vidm_pbase, videomemory.vidm_size, 738 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 739 740 /* Map the vector page. */ 741 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 742 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 743 744 /* Map the core memory needed before autoconfig */ 745 loop = 0; 746 while (l1_sec_table[loop].size) { 747 vm_size_t sz; 748 749 #ifdef VERBOSE_INIT_ARM 750 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 751 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 752 l1_sec_table[loop].va); 753 #endif 754 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 755 pmap_map_section(l1pagetable, 756 l1_sec_table[loop].va + sz, 757 l1_sec_table[loop].pa + sz, 758 l1_sec_table[loop].prot, 759 l1_sec_table[loop].cache); 760 ++loop; 761 } 762 763 /* 764 * Now we have the real page tables in place so we can switch 765 * to them. Once this is done we will be running with the 766 * REAL kernel page tables. 767 */ 768 769 /* Switch tables */ 770 #ifdef VERBOSE_INIT_ARM 771 printf("switching to new L1 page table\n"); 772 #endif 773 #ifdef VERBOSE_INIT_ARM 774 printf("switching domains\n"); 775 #endif 776 /* be a client to all domains */ 777 cpu_domains(0x55555555); 778 779 setttb(kernel_l1pt.pv_pa); 780 781 /* 782 * We must now clean the cache again.... 783 * Cleaning may be done by reading new data to displace any 784 * dirty data in the cache. This will have happened in setttb() 785 * but since we are boot strapping the addresses used for the read 786 * may have just been remapped and thus the cache could be out 787 * of sync. A re-clean after the switch will cure this. 788 * After booting there are no gross reloations of the kernel thus 789 * this problem will not occur after initarm(). 790 */ 791 cpu_idcache_wbinv_all(); 792 cpu_tlb_flushID(); 793 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 794 795 /* 796 * Moved from cpu_startup() as data_abort_handler() references 797 * this during uvm init 798 */ 799 proc0paddr = (struct user *)kernelstack.pv_va; 800 lwp0.l_addr = proc0paddr; 801 802 /* 803 * if there is support for a serial console ...we should now 804 * reattach it 805 */ 806 /* fcomcndetach();*/ 807 808 /* 809 * Reflect videomemory relocation in the videomemory structure 810 * and reinit console 811 */ 812 if (bootconfig.vram[0].pages == 0) { 813 videomemory.vidm_vbase = VMEM_VBASE; 814 } else { 815 videomemory.vidm_vbase = VMEM_VBASE; 816 bootconfig.display_start = VMEM_VBASE; 817 }; 818 vidc_base = (int *) VIDC_BASE; 819 iomd_base = IOMD_BASE; 820 821 #if NVIDCVIDEO == 0 822 physcon_display_base(VMEM_VBASE); 823 vidcrender_reinit(); 824 #endif 825 826 #ifdef VERBOSE_INIT_ARM 827 printf("running on the new L1 page table!\n"); 828 printf("done.\n"); 829 #endif 830 831 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 832 833 #ifdef VERBOSE_INIT_ARM 834 printf("\n"); 835 #endif 836 837 /* 838 * Pages were allocated during the secondary bootstrap for the 839 * stacks for different CPU modes. 840 * We must now set the r13 registers in the different CPU modes to 841 * point to these stacks. 842 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 843 * of the stack memory. 844 */ 845 #ifdef VERBOSE_INIT_ARM 846 printf("init subsystems: stacks "); 847 console_flush(); 848 #endif 849 850 set_stackptr(PSR_IRQ32_MODE, 851 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 852 set_stackptr(PSR_ABT32_MODE, 853 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 854 set_stackptr(PSR_UND32_MODE, 855 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 856 #ifdef PMAP_DEBUG 857 if (pmap_debug_level >= 0) 858 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 859 kernelstack.pv_pa); 860 #endif /* PMAP_DEBUG */ 861 862 /* 863 * Well we should set a data abort handler. 864 * Once things get going this will change as we will need a proper 865 * handler. Until then we will use a handler that just panics but 866 * tells us why. 867 * Initialisation of the vectors will just panic on a data abort. 868 * This just fills in a slightly better one. 869 */ 870 #ifdef VERBOSE_INIT_ARM 871 printf("vectors "); 872 #endif 873 data_abort_handler_address = (u_int)data_abort_handler; 874 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 875 undefined_handler_address = (u_int)undefinedinstruction_bounce; 876 console_flush(); 877 878 879 /* 880 * At last ! 881 * We now have the kernel in physical memory from the bottom upwards. 882 * Kernel page tables are physically above this. 883 * The kernel is mapped to 0xf0000000 884 * The kernel data PTs will handle the mapping of 885 * 0xf1000000-0xf5ffffff (80 Mb) 886 * 2Meg of VRAM is mapped to 0xf7000000 887 * The page tables are mapped to 0xefc00000 888 * The IOMD is mapped to 0xf6000000 889 * The VIDC is mapped to 0xf6100000 890 * The IOMD/VIDC could be pushed up higher but i havent got 891 * sufficient documentation to do so; the addresses are not 892 * parametized yet and hard to read... better fix this before; 893 * its pretty unforgiving. 894 */ 895 896 /* Initialise the undefined instruction handlers */ 897 #ifdef VERBOSE_INIT_ARM 898 printf("undefined "); 899 #endif 900 undefined_init(); 901 console_flush(); 902 903 /* Load memory into UVM. */ 904 #ifdef VERBOSE_INIT_ARM 905 printf("page "); 906 #endif 907 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 908 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 909 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 910 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 911 912 if (start < physical_freestart) 913 start = physical_freestart; 914 if (end > physical_freeend) 915 end = physical_freeend; 916 917 /* XXX Consider DMA range intersection checking. */ 918 919 uvm_page_physload(atop(start), atop(end), 920 atop(start), atop(end), VM_FREELIST_DEFAULT); 921 } 922 923 /* Boot strap pmap telling it where the kernel page table is */ 924 #ifdef VERBOSE_INIT_ARM 925 printf("pmap "); 926 #endif 927 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 928 KERNEL_VM_BASE + KERNEL_VM_SIZE); 929 console_flush(); 930 931 /* Setup the IRQ system */ 932 #ifdef VERBOSE_INIT_ARM 933 printf("irq "); 934 #endif 935 console_flush(); 936 irq_init(); 937 #ifdef VERBOSE_INIT_ARM 938 printf("done.\n\n"); 939 #endif 940 941 #if NVIDCVIDEO>0 942 consinit(); /* necessary ? */ 943 #endif 944 945 /* Talk to the user */ 946 printf("NetBSD/evbarm booting ... \n"); 947 948 /* Tell the user if his boot loader is too old */ 949 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 950 (bootconfig.version != BOOTCONFIG_VERSION)) { 951 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 952 delay(5000000); 953 } 954 955 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 956 printf("Kernel arg string (@%p) %s\n", 957 bootconfig.args, bootconfig.args); 958 printf("\nBoot configuration structure reports the following " 959 "memory\n"); 960 961 printf(" DRAM block 0a at %08x size %08x " 962 "DRAM block 0b at %08x size %08x\n\r", 963 bootconfig.dram[0].address, 964 bootconfig.dram[0].pages * bootconfig.pagesize, 965 bootconfig.dram[1].address, 966 bootconfig.dram[1].pages * bootconfig.pagesize); 967 printf(" DRAM block 1a at %08x size %08x " 968 "DRAM block 1b at %08x size %08x\n\r", 969 bootconfig.dram[2].address, 970 bootconfig.dram[2].pages * bootconfig.pagesize, 971 bootconfig.dram[3].address, 972 bootconfig.dram[3].pages * bootconfig.pagesize); 973 printf(" VRAM block 0 at %08x size %08x\n\r", 974 bootconfig.vram[0].address, 975 bootconfig.vram[0].pages * bootconfig.pagesize); 976 977 #ifdef IPKDB 978 /* Initialise ipkdb */ 979 ipkdb_init(); 980 if (boothowto & RB_KDB) 981 ipkdb_connect(0); 982 #endif /* NIPKDB */ 983 984 #if NKSYMS || defined(DDB) || defined(LKM) 985 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 986 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 987 #endif 988 989 990 #ifdef DDB 991 db_machine_init(); 992 if (boothowto & RB_KDB) 993 Debugger(); 994 #endif /* DDB */ 995 996 /* We return the new stack pointer address */ 997 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 998 } 999 1000 1001 static void 1002 process_kernel_args(void) 1003 { 1004 char *args; 1005 1006 /* Ok now we will check the arguments for interesting parameters. */ 1007 args = bootconfig.args; 1008 boothowto = 0; 1009 1010 /* Only arguments itself are passed from the new bootloader */ 1011 while (*args == ' ') 1012 ++args; 1013 1014 boot_args = args; 1015 parse_mi_bootargs(boot_args); 1016 parse_rpc_bootargs(boot_args); 1017 } 1018 1019 1020 void 1021 parse_rpc_bootargs(char *args) 1022 { 1023 int integer; 1024 1025 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 1026 &integer)) { 1027 videodram_size = integer; 1028 /* Round to 4K page */ 1029 videodram_size *= 1024; 1030 videodram_size = round_page(videodram_size); 1031 if (videodram_size > 1024*1024) 1032 videodram_size = 1024*1024; 1033 } 1034 } 1035 /* End of machdep.c */ 1036
Indexes created Wed Oct 22 13:09:56 GMT 2025