eb7500atx_machdep.c revision 1.6
1 /* $NetBSD: eb7500atx_machdep.c,v 1.6 2006/10/24 21:03:13 bjh21 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 2006/10/24 21:03:13 bjh21 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 spl_mask; 238 extern u_int current_mask; 239 240 void 241 cpu_reboot(int howto, char *bootstr) 242 { 243 244 #ifdef DIAGNOSTIC 245 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 246 247 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 248 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 249 irqmasks[IPL_VM]); 250 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 251 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 252 253 /* dump_spl_masks(); */ 254 #endif /* DIAGNOSTIC */ 255 256 /* 257 * If we are still cold then hit the air brakes 258 * and crash to earth fast 259 */ 260 if (cold) { 261 doshutdownhooks(); 262 printf("Halted while still in the ICE age.\n"); 263 printf("The operating system has halted.\n"); 264 printf("Please press any key to reboot.\n\n"); 265 cngetc(); 266 printf("rebooting...\n"); 267 cpu_reset(); 268 /*NOTREACHED*/ 269 } 270 271 /* Disable console buffering */ 272 cnpollc(1); 273 274 /* 275 * If RB_NOSYNC was not specified sync the discs. 276 * Note: Unless cold is set to 1 here, syslogd will die during 277 * the unmount. It looks like syslogd is getting woken up 278 * only to find that it cannot page part of the binary in as 279 * the filesystem has been unmounted. 280 */ 281 if (!(howto & RB_NOSYNC)) 282 bootsync(); 283 284 /* Say NO to interrupts */ 285 splhigh(); 286 287 /* Do a dump if requested. */ 288 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 289 dumpsys(); 290 291 /* 292 * Auto reboot overload protection 293 * 294 * This code stops the kernel entering an endless loop of reboot 295 * - panic cycles. This will have the effect of stopping further 296 * reboots after it has rebooted 8 times after panics. A clean 297 * halt or reboot will reset the counter. 298 */ 299 300 /* Run any shutdown hooks */ 301 doshutdownhooks(); 302 303 /* Make sure IRQ's are disabled */ 304 IRQdisable; 305 306 if (howto & RB_HALT) { 307 printf("The operating system has halted.\n"); 308 printf("Please press any key to reboot.\n\n"); 309 cngetc(); 310 } 311 312 printf("rebooting...\n"); 313 cpu_reset(); 314 /*NOTREACHED*/ 315 } 316 317 318 /* 319 * u_int initarm(BootConfig *bootconf) 320 * 321 * Initial entry point on startup. This gets called before main() is 322 * entered. 323 * It should be responsible for setting up everything that must be 324 * in place when main is called. 325 * This includes 326 * Taking a copy of the boot configuration structure. 327 * Initialising the physical console so characters can be printed. 328 * Setting up page tables for the kernel 329 * Relocating the kernel to the bottom of physical memory 330 */ 331 332 /* 333 * this part is completely rewritten for the new bootloader ... It features 334 * a flat memory map with a mapping comparable to the EBSA arm32 machine 335 * to boost the portability and likeness of the code 336 */ 337 338 /* 339 * Mapping table for core kernel memory. This memory is mapped at init 340 * time with section mappings. 341 * 342 * XXX One big assumption in the current architecture seems that the kernel is 343 * XXX supposed to be mapped into bootconfig.dram[0]. 344 */ 345 346 #define ONE_MB 0x100000 347 348 struct l1_sec_map { 349 vaddr_t va; 350 paddr_t pa; 351 vsize_t size; 352 vm_prot_t prot; 353 int cache; 354 } l1_sec_table[] = { 355 /* Map 1Mb section for VIDC20 */ 356 { VIDC_BASE, VIDC_HW_BASE, 357 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 358 PTE_NOCACHE }, 359 360 /* Map 1Mb section from IOMD */ 361 { IOMD_BASE, IOMD_HW_BASE, 362 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 363 PTE_NOCACHE }, 364 365 /* Map 1Mb of COMBO (and module space) */ 366 { IO_BASE, IO_HW_BASE, 367 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 368 PTE_NOCACHE }, 369 { 0, 0, 0, 0, 0 } 370 }; 371 372 373 static void 374 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 375 { 376 /* check for bootconfig v2+ structure */ 377 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 378 /* v2+ cleaned up structure found */ 379 *bootconf = *raw_bootconf; 380 return; 381 } else { 382 panic2(("Internal error: no valid bootconfig block found")); 383 } 384 } 385 386 387 u_int 388 initarm(void *cookie) 389 { 390 struct bootconfig *raw_bootconf = cookie; 391 int loop; 392 int loop1; 393 u_int logical; 394 u_int kerneldatasize; 395 u_int l1pagetable; 396 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 397 pv_addr_t kernel_l1pt = { {0} }; 398 399 /* 400 * Heads up ... Setup the CPU / MMU / TLB functions 401 */ 402 set_cpufuncs(); 403 404 /* canonicalise the boot configuration structure to alow versioning */ 405 canonicalise_bootconfig(&bootconfig, raw_bootconf); 406 booted_kernel = bootconfig.kernelname; 407 408 /* if the wscons interface is used, switch off VERBOSE booting :( */ 409 #if NVIDCVIDEO>0 410 # undef VERBOSE_INIT_ARM 411 # undef PMAP_DEBUG 412 #endif 413 414 /* 415 * Initialise the video memory descriptor 416 * 417 * Note: all references to the video memory virtual/physical address 418 * should go via this structure. 419 */ 420 421 /* Hardwire it on the place the bootloader tells us */ 422 videomemory.vidm_vbase = bootconfig.display_start; 423 videomemory.vidm_pbase = bootconfig.display_phys; 424 videomemory.vidm_size = bootconfig.display_size; 425 if (bootconfig.vram[0].pages) 426 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 427 else 428 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 429 vidc_base = (int *) VIDC_HW_BASE; 430 iomd_base = IOMD_HW_BASE; 431 432 /* 433 * Initialise the physical console 434 * This is done in main() but for the moment we do it here so that 435 * we can use printf in initarm() before main() has been called. 436 * only for `vidcconsole!' ... not wscons 437 */ 438 #if NVIDCVIDEO == 0 439 consinit(); 440 #endif 441 442 /* 443 * Initialise the diagnostic serial console 444 * This allows a means of generating output during initarm(). 445 * Once all the memory map changes are complete we can call consinit() 446 * and not have to worry about things moving. 447 */ 448 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 449 /* XXX snif .... i am still not able to this */ 450 451 /* 452 * We have the following memory map (derived from EBSA) 453 * 454 * virtual address == physical address apart from the areas: 455 * 0x00000000 -> 0x000fffff which is mapped to 456 * top 1MB of physical memory 457 * 0xf0000000 -> 0xf0ffffff wich is mapped to 458 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 459 * 460 * This means that the kernel is mapped suitably for continuing 461 * execution, all I/O is mapped 1:1 virtual to physical and 462 * physical memory is accessible. 463 * 464 * The initarm() has the responsibility for creating the kernel 465 * page tables. 466 * It must also set up various memory pointers that are used 467 * by pmap etc. 468 */ 469 470 /* START OF REAL NEW STUFF */ 471 472 /* Check to make sure the page size is correct */ 473 if (PAGE_SIZE != bootconfig.pagesize) 474 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 475 bootconfig.pagesize, PAGE_SIZE)); 476 477 /* process arguments */ 478 process_kernel_args(); 479 480 481 /* 482 * Now set up the page tables for the kernel ... this part is copied 483 * in a (modified?) way from the EBSA machine port.... 484 */ 485 486 #ifdef VERBOSE_INIT_ARM 487 printf("Allocating page tables\n"); 488 #endif 489 /* 490 * Set up the variables that define the availablilty of physical 491 * memory 492 */ 493 physical_start = 0xffffffff; 494 physical_end = 0; 495 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 496 if (bootconfig.dram[loop].address < physical_start) 497 physical_start = bootconfig.dram[loop].address; 498 memoryblock_end = bootconfig.dram[loop].address + 499 bootconfig.dram[loop].pages * PAGE_SIZE; 500 if (memoryblock_end > physical_end) 501 physical_end = memoryblock_end; 502 physmem += bootconfig.dram[loop].pages; 503 }; 504 /* constants for now, but might be changed/configured */ 505 dma_range_begin = (paddr_t) physical_start; 506 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 507 /* XXX HACK HACK XXX */ 508 /* dma_range_end = 0x18000000; */ 509 510 if (physical_start != bootconfig.dram[0].address) { 511 int oldblocks = 0; 512 513 /* 514 * must be a kinetic, as it's the only thing to shuffle memory 515 * around 516 */ 517 /* hack hack - throw away the slow dram */ 518 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 519 if (bootconfig.dram[loop].address < 520 bootconfig.dram[0].address) { 521 /* non kinetic ram */ 522 bootconfig.dram[loop].address = 0; 523 physmem -= bootconfig.dram[loop].pages; 524 bootconfig.drampages -= 525 bootconfig.dram[loop].pages; 526 bootconfig.dram[loop].pages = 0; 527 oldblocks++; 528 } 529 } 530 physical_start = bootconfig.dram[0].address; 531 bootconfig.dramblocks -= oldblocks; 532 } 533 534 physical_freestart = physical_start; 535 free_pages = bootconfig.drampages; 536 physical_freeend = physical_end; 537 538 539 /* 540 * AHUM !! set this variable ... it was set up in the old 1st 541 * stage bootloader 542 */ 543 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 544 545 /* Update the address of the first free page of physical memory */ 546 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 547 physical_freestart += 548 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 549 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 550 551 /* Define a macro to simplify memory allocation */ 552 #define valloc_pages(var, np) \ 553 alloc_pages((var).pv_pa, (np)); \ 554 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 555 556 #define alloc_pages(var, np) \ 557 (var) = physical_freestart; \ 558 physical_freestart += ((np) * PAGE_SIZE); \ 559 free_pages -= (np); \ 560 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 561 562 loop1 = 0; 563 kernel_l1pt.pv_pa = 0; 564 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 565 /* Are we 16KB aligned for an L1 ? */ 566 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 567 && kernel_l1pt.pv_pa == 0) { 568 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 569 } else { 570 valloc_pages(kernel_pt_table[loop1], 571 L2_TABLE_SIZE / PAGE_SIZE); 572 ++loop1; 573 } 574 } 575 576 577 #ifdef DIAGNOSTIC 578 /* This should never be able to happen but better confirm that. */ 579 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 580 panic2(("initarm: Failed to align the kernel page " 581 "directory\n")); 582 #endif 583 584 /* 585 * Allocate a page for the system page mapped to V0x00000000 586 * This page will just contain the system vectors and can be 587 * shared by all processes. 588 */ 589 alloc_pages(systempage.pv_pa, 1); 590 591 /* Allocate stacks for all modes */ 592 valloc_pages(irqstack, IRQ_STACK_SIZE); 593 valloc_pages(abtstack, ABT_STACK_SIZE); 594 valloc_pages(undstack, UND_STACK_SIZE); 595 valloc_pages(kernelstack, UPAGES); 596 597 #ifdef VERBOSE_INIT_ARM 598 printf("Setting up stacks :\n"); 599 printf("IRQ stack: p0x%08lx v0x%08lx\n", 600 irqstack.pv_pa, irqstack.pv_va); 601 printf("ABT stack: p0x%08lx v0x%08lx\n", 602 abtstack.pv_pa, abtstack.pv_va); 603 printf("UND stack: p0x%08lx v0x%08lx\n", 604 undstack.pv_pa, undstack.pv_va); 605 printf("SVC stack: p0x%08lx v0x%08lx\n", 606 kernelstack.pv_pa, kernelstack.pv_va); 607 printf("\n"); 608 #endif 609 610 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 611 612 #ifdef CPU_SA110 613 /* 614 * XXX totally stuffed hack to work round problems introduced 615 * in recent versions of the pmap code. Due to the calls used there 616 * we cannot allocate virtual memory during bootstrap. 617 */ 618 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 619 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 620 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 621 #endif /* CPU_SA110 */ 622 623 /* 624 * Ok we have allocated physical pages for the primary kernel 625 * page tables 626 */ 627 628 #ifdef VERBOSE_INIT_ARM 629 printf("Creating L1 page table\n"); 630 #endif 631 632 /* 633 * Now we start construction of the L1 page table 634 * We start by mapping the L2 page tables into the L1. 635 * This means that we can replace L1 mappings later on if necessary 636 */ 637 l1pagetable = kernel_l1pt.pv_pa; 638 639 /* Map the L2 pages tables in the L1 page table */ 640 pmap_link_l2pt(l1pagetable, 0x00000000, 641 &kernel_pt_table[KERNEL_PT_SYS]); 642 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 643 &kernel_pt_table[KERNEL_PT_KERNEL]); 644 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 645 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 646 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 647 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 648 &kernel_pt_table[KERNEL_PT_VMEM]); 649 650 /* update the top of the kernel VM */ 651 pmap_curmaxkvaddr = 652 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 653 654 #ifdef VERBOSE_INIT_ARM 655 printf("Mapping kernel\n"); 656 #endif 657 658 /* Now we fill in the L2 pagetable for the kernel code/data */ 659 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 660 /* 661 * The defines are a workaround for a recent problem that occurred 662 * with ARM 610 processors and some ARM 710 processors 663 * Other ARM 710 and StrongARM processors don't have a problem. 664 */ 665 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 666 #if defined(CPU_ARM6) || defined(CPU_ARM7) 667 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 668 physical_start, kernexec->a_text, 669 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 670 #else /* CPU_ARM6 || CPU_ARM7 */ 671 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 672 physical_start, kernexec->a_text, 673 VM_PROT_READ, PTE_CACHE); 674 #endif /* CPU_ARM6 || CPU_ARM7 */ 675 logical += pmap_map_chunk(l1pagetable, 676 KERNEL_TEXT_BASE + logical, physical_start + logical, 677 kerneldatasize - kernexec->a_text, 678 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 679 } else { /* !ZMAGIC */ 680 /* 681 * Most likely an ELF kernel ... 682 * XXX no distinction yet between read only and 683 * read/write area's ... 684 */ 685 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 686 physical_start, kerneldatasize, 687 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 688 }; 689 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("Constructing L2 page tables\n"); 693 #endif 694 695 /* Map the stack pages */ 696 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 697 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 699 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 701 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 702 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 703 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 704 705 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 706 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 707 708 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 709 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 710 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 711 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 712 } 713 714 /* Now we fill in the L2 pagetable for the VRAM */ 715 /* 716 * Current architectures mean that the VRAM is always in 1 717 * continuous bank. This means that we can just map the 2 meg 718 * that the VRAM would occupy. In theory we don't need a page 719 * table for VRAM, we could section map it but we would need 720 * the page tables if DRAM was in use. 721 * XXX please map two adjacent virtual areas to ONE physical 722 * area 723 */ 724 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 725 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 726 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 727 videomemory.vidm_pbase, videomemory.vidm_size, 728 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 729 730 /* Map the vector page. */ 731 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 732 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 733 734 /* Map the core memory needed before autoconfig */ 735 loop = 0; 736 while (l1_sec_table[loop].size) { 737 vm_size_t sz; 738 739 #ifdef VERBOSE_INIT_ARM 740 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 741 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 742 l1_sec_table[loop].va); 743 #endif 744 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 745 pmap_map_section(l1pagetable, 746 l1_sec_table[loop].va + sz, 747 l1_sec_table[loop].pa + sz, 748 l1_sec_table[loop].prot, 749 l1_sec_table[loop].cache); 750 ++loop; 751 } 752 753 /* 754 * Now we have the real page tables in place so we can switch 755 * to them. Once this is done we will be running with the 756 * REAL kernel page tables. 757 */ 758 759 /* Switch tables */ 760 #ifdef VERBOSE_INIT_ARM 761 printf("switching to new L1 page table\n"); 762 #endif 763 #ifdef VERBOSE_INIT_ARM 764 printf("switching domains\n"); 765 #endif 766 /* be a client to all domains */ 767 cpu_domains(0x55555555); 768 769 setttb(kernel_l1pt.pv_pa); 770 771 /* 772 * We must now clean the cache again.... 773 * Cleaning may be done by reading new data to displace any 774 * dirty data in the cache. This will have happened in setttb() 775 * but since we are boot strapping the addresses used for the read 776 * may have just been remapped and thus the cache could be out 777 * of sync. A re-clean after the switch will cure this. 778 * After booting there are no gross reloations of the kernel thus 779 * this problem will not occur after initarm(). 780 */ 781 cpu_idcache_wbinv_all(); 782 cpu_tlb_flushID(); 783 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 784 785 /* 786 * Moved from cpu_startup() as data_abort_handler() references 787 * this during uvm init 788 */ 789 proc0paddr = (struct user *)kernelstack.pv_va; 790 lwp0.l_addr = proc0paddr; 791 792 /* 793 * if there is support for a serial console ...we should now 794 * reattach it 795 */ 796 /* fcomcndetach();*/ 797 798 /* 799 * Reflect videomemory relocation in the videomemory structure 800 * and reinit console 801 */ 802 if (bootconfig.vram[0].pages == 0) { 803 videomemory.vidm_vbase = VMEM_VBASE; 804 } else { 805 videomemory.vidm_vbase = VMEM_VBASE; 806 bootconfig.display_start = VMEM_VBASE; 807 }; 808 vidc_base = (int *) VIDC_BASE; 809 iomd_base = IOMD_BASE; 810 811 #ifdef VERBOSE_INIT_ARM 812 printf("running on the new L1 page table!\n"); 813 printf("done.\n"); 814 #endif 815 816 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 817 818 #ifdef VERBOSE_INIT_ARM 819 printf("\n"); 820 #endif 821 822 /* 823 * Pages were allocated during the secondary bootstrap for the 824 * stacks for different CPU modes. 825 * We must now set the r13 registers in the different CPU modes to 826 * point to these stacks. 827 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 828 * of the stack memory. 829 */ 830 #ifdef VERBOSE_INIT_ARM 831 printf("init subsystems: stacks "); 832 console_flush(); 833 #endif 834 835 set_stackptr(PSR_IRQ32_MODE, 836 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 837 set_stackptr(PSR_ABT32_MODE, 838 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 839 set_stackptr(PSR_UND32_MODE, 840 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 841 #ifdef PMAP_DEBUG 842 if (pmap_debug_level >= 0) 843 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 844 kernelstack.pv_pa); 845 #endif /* PMAP_DEBUG */ 846 847 /* 848 * Well we should set a data abort handler. 849 * Once things get going this will change as we will need a proper 850 * handler. Until then we will use a handler that just panics but 851 * tells us why. 852 * Initialisation of the vectors will just panic on a data abort. 853 * This just fills in a slightly better one. 854 */ 855 #ifdef VERBOSE_INIT_ARM 856 printf("vectors "); 857 #endif 858 data_abort_handler_address = (u_int)data_abort_handler; 859 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 860 undefined_handler_address = (u_int)undefinedinstruction_bounce; 861 console_flush(); 862 863 864 /* 865 * At last ! 866 * We now have the kernel in physical memory from the bottom upwards. 867 * Kernel page tables are physically above this. 868 * The kernel is mapped to 0xf0000000 869 * The kernel data PTs will handle the mapping of 870 * 0xf1000000-0xf5ffffff (80 Mb) 871 * 2Meg of VRAM is mapped to 0xf7000000 872 * The page tables are mapped to 0xefc00000 873 * The IOMD is mapped to 0xf6000000 874 * The VIDC is mapped to 0xf6100000 875 * The IOMD/VIDC could be pushed up higher but i havent got 876 * sufficient documentation to do so; the addresses are not 877 * parametized yet and hard to read... better fix this before; 878 * its pretty unforgiving. 879 */ 880 881 /* Initialise the undefined instruction handlers */ 882 #ifdef VERBOSE_INIT_ARM 883 printf("undefined "); 884 #endif 885 undefined_init(); 886 console_flush(); 887 888 /* Load memory into UVM. */ 889 #ifdef VERBOSE_INIT_ARM 890 printf("page "); 891 #endif 892 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 893 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 894 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 895 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 896 897 if (start < physical_freestart) 898 start = physical_freestart; 899 if (end > physical_freeend) 900 end = physical_freeend; 901 902 /* XXX Consider DMA range intersection checking. */ 903 904 uvm_page_physload(atop(start), atop(end), 905 atop(start), atop(end), VM_FREELIST_DEFAULT); 906 } 907 908 /* Boot strap pmap telling it where the kernel page table is */ 909 #ifdef VERBOSE_INIT_ARM 910 printf("pmap "); 911 #endif 912 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 913 KERNEL_VM_BASE + KERNEL_VM_SIZE); 914 console_flush(); 915 916 /* Setup the IRQ system */ 917 #ifdef VERBOSE_INIT_ARM 918 printf("irq "); 919 #endif 920 console_flush(); 921 irq_init(); 922 #ifdef VERBOSE_INIT_ARM 923 printf("done.\n\n"); 924 #endif 925 926 #if NVIDCVIDEO>0 927 consinit(); /* necessary ? */ 928 #endif 929 930 /* Talk to the user */ 931 printf("NetBSD/evbarm booting ... \n"); 932 933 /* Tell the user if his boot loader is too old */ 934 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 935 (bootconfig.version != BOOTCONFIG_VERSION)) { 936 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 937 delay(5000000); 938 } 939 940 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 941 printf("Kernel arg string (@%p) %s\n", 942 bootconfig.args, bootconfig.args); 943 printf("\nBoot configuration structure reports the following " 944 "memory\n"); 945 946 printf(" DRAM block 0a at %08x size %08x " 947 "DRAM block 0b at %08x size %08x\n\r", 948 bootconfig.dram[0].address, 949 bootconfig.dram[0].pages * bootconfig.pagesize, 950 bootconfig.dram[1].address, 951 bootconfig.dram[1].pages * bootconfig.pagesize); 952 printf(" DRAM block 1a at %08x size %08x " 953 "DRAM block 1b at %08x size %08x\n\r", 954 bootconfig.dram[2].address, 955 bootconfig.dram[2].pages * bootconfig.pagesize, 956 bootconfig.dram[3].address, 957 bootconfig.dram[3].pages * bootconfig.pagesize); 958 printf(" VRAM block 0 at %08x size %08x\n\r", 959 bootconfig.vram[0].address, 960 bootconfig.vram[0].pages * bootconfig.pagesize); 961 962 #ifdef IPKDB 963 /* Initialise ipkdb */ 964 ipkdb_init(); 965 if (boothowto & RB_KDB) 966 ipkdb_connect(0); 967 #endif /* NIPKDB */ 968 969 #if NKSYMS || defined(DDB) || defined(LKM) 970 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 971 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 972 #endif 973 974 975 #ifdef DDB 976 db_machine_init(); 977 if (boothowto & RB_KDB) 978 Debugger(); 979 #endif /* DDB */ 980 981 /* We return the new stack pointer address */ 982 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 983 } 984 985 986 static void 987 process_kernel_args(void) 988 { 989 char *args; 990 991 /* Ok now we will check the arguments for interesting parameters. */ 992 args = bootconfig.args; 993 boothowto = 0; 994 995 /* Only arguments itself are passed from the new bootloader */ 996 while (*args == ' ') 997 ++args; 998 999 boot_args = args; 1000 parse_mi_bootargs(boot_args); 1001 parse_rpc_bootargs(boot_args); 1002 } 1003 1004 1005 void 1006 parse_rpc_bootargs(char *args) 1007 { 1008 int integer; 1009 1010 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 1011 &integer)) { 1012 videodram_size = integer; 1013 /* Round to 4K page */ 1014 videodram_size *= 1024; 1015 videodram_size = round_page(videodram_size); 1016 if (videodram_size > 1024*1024) 1017 videodram_size = 1024*1024; 1018 } 1019 } 1020 /* End of machdep.c */ 1021
Indexes created Thu Oct 23 22:10:10 GMT 2025