eb7500atx_machdep.c revision 1.24.2.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.24.2.1 2012/11/20 03:00:54 tls Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2002 Reinoud Zandijk. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * RiscBSD kernel project 39 * 40 * machdep.c 41 * 42 * Machine dependent functions for kernel setup 43 * 44 * This file still needs a lot of work 45 * 46 * Created : 17/09/94 47 * Updated for yet another new bootloader 28/12/02 48 */ 49 50 #include "opt_ddb.h" 51 #include "opt_modular.h" 52 #include "opt_pmap_debug.h" 53 #include "vidcvideo.h" 54 #include "pckbc.h" 55 56 #include <sys/param.h> 57 58 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.24.2.1 2012/11/20 03:00:54 tls Exp $"); 59 60 #include <sys/systm.h> 61 #include <sys/kernel.h> 62 #include <sys/reboot.h> 63 #include <sys/proc.h> 64 #include <sys/msgbuf.h> 65 #include <sys/exec.h> 66 #include <sys/exec_aout.h> 67 #include <sys/ksyms.h> 68 #include <sys/bus.h> 69 70 #include <dev/cons.h> 71 72 #include <machine/db_machdep.h> 73 #include <ddb/db_sym.h> 74 #include <ddb/db_extern.h> 75 76 #include <uvm/uvm.h> 77 78 #include <machine/signal.h> 79 #include <machine/frame.h> 80 #include <machine/bootconfig.h> 81 #include <machine/cpu.h> 82 #include <machine/io.h> 83 #include <machine/intr.h> 84 #include <arm/cpuconf.h> 85 #include <arm/arm32/katelib.h> 86 #include <arm/arm32/machdep.h> 87 #include <arm/undefined.h> 88 #include <machine/rtc.h> 89 90 #include <arm/iomd/vidc.h> 91 #include <arm/iomd/iomdreg.h> 92 #include <arm/iomd/iomdvar.h> 93 94 #include <arm/iomd/vidcvideo.h> 95 96 #include <sys/device.h> 97 #include <dev/ic/pckbcvar.h> 98 99 #include <dev/i2c/i2cvar.h> 100 #include <dev/i2c/pcf8583var.h> 101 #include <arm/iomd/iomdiicvar.h> 102 103 /* static i2c_tag_t acorn32_i2c_tag;*/ 104 105 #include "ksyms.h" 106 107 /* Kernel text starts at the base of the kernel address space. */ 108 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 109 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 110 111 /* 112 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 113 * Fixed mappings exist from 0xf6000000 - 0xffffffff 114 */ 115 #define KERNEL_VM_SIZE 0x05000000 116 117 /* 118 * Address to call from cpu_reset() to reset the machine. 119 * This is machine architecture dependent as it varies depending 120 * on where the ROM appears when you turn the MMU off. 121 */ 122 123 #define VERBOSE_INIT_ARM 124 125 struct bootconfig bootconfig; /* Boot config storage */ 126 videomemory_t videomemory; /* Video memory descriptor */ 127 128 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 129 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 130 131 extern int *vidc_base; 132 extern uint32_t iomd_base; 133 extern struct bus_space iomd_bs_tag; 134 135 paddr_t physical_start; 136 paddr_t physical_freestart; 137 paddr_t physical_freeend; 138 paddr_t physical_end; 139 paddr_t dma_range_begin; 140 paddr_t dma_range_end; 141 142 u_int free_pages; 143 paddr_t memoryblock_end; 144 145 #ifndef PMAP_STATIC_L1S 146 int max_processes = 64; /* Default number */ 147 #endif /* !PMAP_STATIC_L1S */ 148 149 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 150 151 paddr_t msgbufphys; 152 153 #ifdef PMAP_DEBUG 154 extern int pmap_debug_level; 155 #endif /* PMAP_DEBUG */ 156 157 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 158 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 159 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 160 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 161 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 162 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 163 164 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 165 166 167 #ifdef CPU_SA110 168 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 169 static vaddr_t sa110_cc_base; 170 #endif /* CPU_SA110 */ 171 172 /* Prototypes */ 173 void physcon_display_base(u_int); 174 extern void consinit(void); 175 176 void data_abort_handler(trapframe_t *); 177 void prefetch_abort_handler(trapframe_t *); 178 void undefinedinstruction_bounce(trapframe_t *frame); 179 180 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 181 static void process_kernel_args(void); 182 183 extern void dump_spl_masks(void); 184 185 void rpc_sa110_cc_setup(void); 186 187 void parse_rpc_bootargs(char *args); 188 189 extern void dumpsys(void); 190 191 192 # define console_flush() /* empty */ 193 194 195 #define panic2(a) do { \ 196 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 197 consinit(); \ 198 panic a; \ 199 } while (/* CONSTCOND */ 0) 200 201 /* 202 * void cpu_reboot(int howto, char *bootstr) 203 * 204 * Reboots the system 205 * 206 * Deal with any syncing, unmounting, dumping and shutdown hooks, 207 * then reset the CPU. 208 */ 209 210 /* NOTE: These variables will be removed, well some of them */ 211 212 extern u_int current_mask; 213 214 void 215 cpu_reboot(int howto, char *bootstr) 216 { 217 218 #ifdef DIAGNOSTIC 219 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 220 221 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 222 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 223 irqmasks[IPL_VM]); 224 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 225 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 226 227 /* dump_spl_masks(); */ 228 #endif /* DIAGNOSTIC */ 229 230 /* 231 * If we are still cold then hit the air brakes 232 * and crash to earth fast 233 */ 234 if (cold) { 235 doshutdownhooks(); 236 pmf_system_shutdown(boothowto); 237 printf("Halted while still in the ICE age.\n"); 238 printf("The operating system has halted.\n"); 239 printf("Please press any key to reboot.\n\n"); 240 cngetc(); 241 printf("rebooting...\n"); 242 cpu_reset(); 243 /*NOTREACHED*/ 244 } 245 246 /* Disable console buffering */ 247 cnpollc(1); 248 249 /* 250 * If RB_NOSYNC was not specified sync the discs. 251 * Note: Unless cold is set to 1 here, syslogd will die during 252 * the unmount. It looks like syslogd is getting woken up 253 * only to find that it cannot page part of the binary in as 254 * the filesystem has been unmounted. 255 */ 256 if (!(howto & RB_NOSYNC)) 257 bootsync(); 258 259 /* Say NO to interrupts */ 260 splhigh(); 261 262 /* Do a dump if requested. */ 263 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 264 dumpsys(); 265 266 /* 267 * Auto reboot overload protection 268 * 269 * This code stops the kernel entering an endless loop of reboot 270 * - panic cycles. This will have the effect of stopping further 271 * reboots after it has rebooted 8 times after panics. A clean 272 * halt or reboot will reset the counter. 273 */ 274 275 /* Run any shutdown hooks */ 276 doshutdownhooks(); 277 278 pmf_system_shutdown(boothowto); 279 280 /* Make sure IRQ's are disabled */ 281 IRQdisable; 282 283 if (howto & RB_HALT) { 284 printf("The operating system has halted.\n"); 285 printf("Please press any key to reboot.\n\n"); 286 cngetc(); 287 } 288 289 printf("rebooting...\n"); 290 cpu_reset(); 291 /*NOTREACHED*/ 292 } 293 294 295 /* 296 * u_int initarm(BootConfig *bootconf) 297 * 298 * Initial entry point on startup. This gets called before main() is 299 * entered. 300 * It should be responsible for setting up everything that must be 301 * in place when main is called. 302 * This includes 303 * Taking a copy of the boot configuration structure. 304 * Initialising the physical console so characters can be printed. 305 * Setting up page tables for the kernel 306 * Relocating the kernel to the bottom of physical memory 307 */ 308 309 /* 310 * this part is completely rewritten for the new bootloader ... It features 311 * a flat memory map with a mapping comparable to the EBSA arm32 machine 312 * to boost the portability and likeness of the code 313 */ 314 315 /* 316 * Mapping table for core kernel memory. This memory is mapped at init 317 * time with section mappings. 318 * 319 * XXX One big assumption in the current architecture seems that the kernel is 320 * XXX supposed to be mapped into bootconfig.dram[0]. 321 */ 322 323 #define ONE_MB 0x100000 324 325 struct l1_sec_map { 326 vaddr_t va; 327 paddr_t pa; 328 vsize_t size; 329 vm_prot_t prot; 330 int cache; 331 } l1_sec_table[] = { 332 /* Map 1Mb section for VIDC20 */ 333 { VIDC_BASE, VIDC_HW_BASE, 334 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 335 PTE_NOCACHE }, 336 337 /* Map 1Mb section from IOMD */ 338 { IOMD_BASE, IOMD_HW_BASE, 339 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE }, 341 342 /* Map 1Mb of COMBO (and module space) */ 343 { IO_BASE, IO_HW_BASE, 344 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 345 PTE_NOCACHE }, 346 { 0, 0, 0, 0, 0 } 347 }; 348 349 350 static void 351 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 352 { 353 /* check for bootconfig v2+ structure */ 354 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 355 /* v2+ cleaned up structure found */ 356 *bootconf = *raw_bootconf; 357 return; 358 } else { 359 panic2(("Internal error: no valid bootconfig block found")); 360 } 361 } 362 363 364 u_int 365 initarm(void *cookie) 366 { 367 struct bootconfig *raw_bootconf = cookie; 368 int loop; 369 int loop1; 370 u_int logical; 371 u_int kerneldatasize; 372 u_int l1pagetable; 373 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 374 375 /* 376 * Heads up ... Setup the CPU / MMU / TLB functions 377 */ 378 set_cpufuncs(); 379 380 /* canonicalise the boot configuration structure to alow versioning */ 381 canonicalise_bootconfig(&bootconfig, raw_bootconf); 382 booted_kernel = bootconfig.kernelname; 383 384 /* if the wscons interface is used, switch off VERBOSE booting :( */ 385 #if NVIDCVIDEO>0 386 # undef VERBOSE_INIT_ARM 387 # undef PMAP_DEBUG 388 #endif 389 390 /* 391 * Initialise the video memory descriptor 392 * 393 * Note: all references to the video memory virtual/physical address 394 * should go via this structure. 395 */ 396 397 /* Hardwire it on the place the bootloader tells us */ 398 videomemory.vidm_vbase = bootconfig.display_start; 399 videomemory.vidm_pbase = bootconfig.display_phys; 400 videomemory.vidm_size = bootconfig.display_size; 401 if (bootconfig.vram[0].pages) 402 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 403 else 404 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 405 vidc_base = (int *) VIDC_HW_BASE; 406 iomd_base = IOMD_HW_BASE; 407 408 /* 409 * Initialise the physical console 410 * This is done in main() but for the moment we do it here so that 411 * we can use printf in initarm() before main() has been called. 412 * only for `vidcconsole!' ... not wscons 413 */ 414 #if NVIDCVIDEO == 0 415 consinit(); 416 #endif 417 418 /* 419 * Initialise the diagnostic serial console 420 * This allows a means of generating output during initarm(). 421 * Once all the memory map changes are complete we can call consinit() 422 * and not have to worry about things moving. 423 */ 424 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 425 /* XXX snif .... i am still not able to this */ 426 427 /* 428 * We have the following memory map (derived from EBSA) 429 * 430 * virtual address == physical address apart from the areas: 431 * 0x00000000 -> 0x000fffff which is mapped to 432 * top 1MB of physical memory 433 * 0xf0000000 -> 0xf0ffffff wich is mapped to 434 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 435 * 436 * This means that the kernel is mapped suitably for continuing 437 * execution, all I/O is mapped 1:1 virtual to physical and 438 * physical memory is accessible. 439 * 440 * The initarm() has the responsibility for creating the kernel 441 * page tables. 442 * It must also set up various memory pointers that are used 443 * by pmap etc. 444 */ 445 446 /* START OF REAL NEW STUFF */ 447 448 /* Check to make sure the page size is correct */ 449 if (PAGE_SIZE != bootconfig.pagesize) 450 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 451 bootconfig.pagesize, PAGE_SIZE)); 452 453 /* process arguments */ 454 process_kernel_args(); 455 456 457 /* 458 * Now set up the page tables for the kernel ... this part is copied 459 * in a (modified?) way from the EBSA machine port.... 460 */ 461 462 #ifdef VERBOSE_INIT_ARM 463 printf("Allocating page tables\n"); 464 #endif 465 /* 466 * Set up the variables that define the availablilty of physical 467 * memory 468 */ 469 physical_start = 0xffffffff; 470 physical_end = 0; 471 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 472 if (bootconfig.dram[loop].address < physical_start) 473 physical_start = bootconfig.dram[loop].address; 474 memoryblock_end = bootconfig.dram[loop].address + 475 bootconfig.dram[loop].pages * PAGE_SIZE; 476 if (memoryblock_end > physical_end) 477 physical_end = memoryblock_end; 478 physmem += bootconfig.dram[loop].pages; 479 }; 480 /* constants for now, but might be changed/configured */ 481 dma_range_begin = (paddr_t) physical_start; 482 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 483 /* XXX HACK HACK XXX */ 484 /* dma_range_end = 0x18000000; */ 485 486 if (physical_start != bootconfig.dram[0].address) { 487 int oldblocks = 0; 488 489 /* 490 * must be a kinetic, as it's the only thing to shuffle memory 491 * around 492 */ 493 /* hack hack - throw away the slow dram */ 494 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 495 if (bootconfig.dram[loop].address < 496 bootconfig.dram[0].address) { 497 /* non kinetic ram */ 498 bootconfig.dram[loop].address = 0; 499 physmem -= bootconfig.dram[loop].pages; 500 bootconfig.drampages -= 501 bootconfig.dram[loop].pages; 502 bootconfig.dram[loop].pages = 0; 503 oldblocks++; 504 } 505 } 506 physical_start = bootconfig.dram[0].address; 507 bootconfig.dramblocks -= oldblocks; 508 } 509 510 physical_freestart = physical_start; 511 free_pages = bootconfig.drampages; 512 physical_freeend = physical_end; 513 514 515 /* 516 * AHUM !! set this variable ... it was set up in the old 1st 517 * stage bootloader 518 */ 519 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 520 521 /* Update the address of the first free page of physical memory */ 522 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 523 physical_freestart += 524 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 525 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 526 527 /* Define a macro to simplify memory allocation */ 528 #define valloc_pages(var, np) \ 529 alloc_pages((var).pv_pa, (np)); \ 530 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 531 532 #define alloc_pages(var, np) \ 533 (var) = physical_freestart; \ 534 physical_freestart += ((np) * PAGE_SIZE); \ 535 free_pages -= (np); \ 536 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 537 538 loop1 = 0; 539 kernel_l1pt.pv_pa = 0; 540 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 541 /* Are we 16KB aligned for an L1 ? */ 542 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 543 && kernel_l1pt.pv_pa == 0) { 544 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 545 } else { 546 valloc_pages(kernel_pt_table[loop1], 547 L2_TABLE_SIZE / PAGE_SIZE); 548 ++loop1; 549 } 550 } 551 552 553 #ifdef DIAGNOSTIC 554 /* This should never be able to happen but better confirm that. */ 555 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 556 panic2(("initarm: Failed to align the kernel page " 557 "directory\n")); 558 #endif 559 560 /* 561 * Allocate a page for the system page mapped to V0x00000000 562 * This page will just contain the system vectors and can be 563 * shared by all processes. 564 */ 565 alloc_pages(systempage.pv_pa, 1); 566 567 /* Allocate stacks for all modes */ 568 valloc_pages(irqstack, IRQ_STACK_SIZE); 569 valloc_pages(abtstack, ABT_STACK_SIZE); 570 valloc_pages(undstack, UND_STACK_SIZE); 571 valloc_pages(kernelstack, UPAGES); 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("Setting up stacks :\n"); 575 printf("IRQ stack: p0x%08lx v0x%08lx\n", 576 irqstack.pv_pa, irqstack.pv_va); 577 printf("ABT stack: p0x%08lx v0x%08lx\n", 578 abtstack.pv_pa, abtstack.pv_va); 579 printf("UND stack: p0x%08lx v0x%08lx\n", 580 undstack.pv_pa, undstack.pv_va); 581 printf("SVC stack: p0x%08lx v0x%08lx\n", 582 kernelstack.pv_pa, kernelstack.pv_va); 583 printf("\n"); 584 #endif 585 586 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 587 588 #ifdef CPU_SA110 589 /* 590 * XXX totally stuffed hack to work round problems introduced 591 * in recent versions of the pmap code. Due to the calls used there 592 * we cannot allocate virtual memory during bootstrap. 593 */ 594 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 595 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 596 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 597 #endif /* CPU_SA110 */ 598 599 /* 600 * Ok we have allocated physical pages for the primary kernel 601 * page tables 602 */ 603 604 #ifdef VERBOSE_INIT_ARM 605 printf("Creating L1 page table\n"); 606 #endif 607 608 /* 609 * Now we start construction of the L1 page table 610 * We start by mapping the L2 page tables into the L1. 611 * This means that we can replace L1 mappings later on if necessary 612 */ 613 l1pagetable = kernel_l1pt.pv_pa; 614 615 /* Map the L2 pages tables in the L1 page table */ 616 pmap_link_l2pt(l1pagetable, 0x00000000, 617 &kernel_pt_table[KERNEL_PT_SYS]); 618 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 619 &kernel_pt_table[KERNEL_PT_KERNEL]); 620 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 621 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 622 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 623 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 624 &kernel_pt_table[KERNEL_PT_VMEM]); 625 626 /* update the top of the kernel VM */ 627 pmap_curmaxkvaddr = 628 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Mapping kernel\n"); 632 #endif 633 634 /* Now we fill in the L2 pagetable for the kernel code/data */ 635 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 636 /* 637 * The defines are a workaround for a recent problem that occurred 638 * with ARM 610 processors and some ARM 710 processors 639 * Other ARM 710 and StrongARM processors don't have a problem. 640 */ 641 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 642 #if defined(CPU_ARM6) || defined(CPU_ARM7) 643 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 644 physical_start, kernexec->a_text, 645 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 646 #else /* CPU_ARM6 || CPU_ARM7 */ 647 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 648 physical_start, kernexec->a_text, 649 VM_PROT_READ, PTE_CACHE); 650 #endif /* CPU_ARM6 || CPU_ARM7 */ 651 logical += pmap_map_chunk(l1pagetable, 652 KERNEL_TEXT_BASE + logical, physical_start + logical, 653 kerneldatasize - kernexec->a_text, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 } else { /* !ZMAGIC */ 656 /* 657 * Most likely an ELF kernel ... 658 * XXX no distinction yet between read only and 659 * read/write area's ... 660 */ 661 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 662 physical_start, kerneldatasize, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 }; 665 666 667 #ifdef VERBOSE_INIT_ARM 668 printf("Constructing L2 page tables\n"); 669 #endif 670 671 /* Map the stack pages */ 672 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 673 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 675 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 677 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 679 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 681 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 682 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 683 684 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 685 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 686 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 687 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 688 } 689 690 /* Now we fill in the L2 pagetable for the VRAM */ 691 /* 692 * Current architectures mean that the VRAM is always in 1 693 * continuous bank. This means that we can just map the 2 meg 694 * that the VRAM would occupy. In theory we don't need a page 695 * table for VRAM, we could section map it but we would need 696 * the page tables if DRAM was in use. 697 * XXX please map two adjacent virtual areas to ONE physical 698 * area 699 */ 700 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 701 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 702 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 703 videomemory.vidm_pbase, videomemory.vidm_size, 704 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 705 706 /* Map the vector page. */ 707 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 708 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 709 710 /* Map the core memory needed before autoconfig */ 711 loop = 0; 712 while (l1_sec_table[loop].size) { 713 vm_size_t sz; 714 715 #ifdef VERBOSE_INIT_ARM 716 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 717 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 718 l1_sec_table[loop].va); 719 #endif 720 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 721 pmap_map_section(l1pagetable, 722 l1_sec_table[loop].va + sz, 723 l1_sec_table[loop].pa + sz, 724 l1_sec_table[loop].prot, 725 l1_sec_table[loop].cache); 726 ++loop; 727 } 728 729 /* 730 * Now we have the real page tables in place so we can switch 731 * to them. Once this is done we will be running with the 732 * REAL kernel page tables. 733 */ 734 735 #ifdef VERBOSE_INIT_ARM 736 printf("switching domains\n"); 737 #endif 738 /* be a client to all domains */ 739 cpu_domains(0x55555555); 740 741 /* Switch tables */ 742 #ifdef VERBOSE_INIT_ARM 743 printf("switching to new L1 page table\n"); 744 #endif 745 cpu_setttb(kernel_l1pt.pv_pa, true); 746 747 /* 748 * We must now clean the cache again.... 749 * Cleaning may be done by reading new data to displace any 750 * dirty data in the cache. This will have happened in cpu_setttb() 751 * but since we are boot strapping the addresses used for the read 752 * may have just been remapped and thus the cache could be out 753 * of sync. A re-clean after the switch will cure this. 754 * After booting there are no gross reloations of the kernel thus 755 * this problem will not occur after initarm(). 756 */ 757 cpu_idcache_wbinv_all(); 758 cpu_tlb_flushID(); 759 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 760 761 /* 762 * Moved from cpu_startup() as data_abort_handler() references 763 * this during uvm init 764 */ 765 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 766 767 /* 768 * if there is support for a serial console ...we should now 769 * reattach it 770 */ 771 /* fcomcndetach();*/ 772 773 /* 774 * Reflect videomemory relocation in the videomemory structure 775 * and reinit console 776 */ 777 if (bootconfig.vram[0].pages == 0) { 778 videomemory.vidm_vbase = VMEM_VBASE; 779 } else { 780 videomemory.vidm_vbase = VMEM_VBASE; 781 bootconfig.display_start = VMEM_VBASE; 782 }; 783 vidc_base = (int *) VIDC_BASE; 784 iomd_base = IOMD_BASE; 785 786 #ifdef VERBOSE_INIT_ARM 787 printf("running on the new L1 page table!\n"); 788 printf("done.\n"); 789 #endif 790 791 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 792 793 #ifdef VERBOSE_INIT_ARM 794 printf("\n"); 795 #endif 796 797 /* 798 * Pages were allocated during the secondary bootstrap for the 799 * stacks for different CPU modes. 800 * We must now set the r13 registers in the different CPU modes to 801 * point to these stacks. 802 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 803 * of the stack memory. 804 */ 805 #ifdef VERBOSE_INIT_ARM 806 printf("init subsystems: stacks "); 807 console_flush(); 808 #endif 809 810 set_stackptr(PSR_IRQ32_MODE, 811 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 812 set_stackptr(PSR_ABT32_MODE, 813 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 814 set_stackptr(PSR_UND32_MODE, 815 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 816 #ifdef PMAP_DEBUG 817 if (pmap_debug_level >= 0) 818 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 819 kernelstack.pv_pa); 820 #endif /* PMAP_DEBUG */ 821 822 /* 823 * Well we should set a data abort handler. 824 * Once things get going this will change as we will need a proper 825 * handler. Until then we will use a handler that just panics but 826 * tells us why. 827 * Initialisation of the vectors will just panic on a data abort. 828 * This just fills in a slightly better one. 829 */ 830 #ifdef VERBOSE_INIT_ARM 831 printf("vectors "); 832 #endif 833 data_abort_handler_address = (u_int)data_abort_handler; 834 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 835 undefined_handler_address = (u_int)undefinedinstruction_bounce; 836 console_flush(); 837 838 839 /* 840 * At last ! 841 * We now have the kernel in physical memory from the bottom upwards. 842 * Kernel page tables are physically above this. 843 * The kernel is mapped to 0xf0000000 844 * The kernel data PTs will handle the mapping of 845 * 0xf1000000-0xf5ffffff (80 Mb) 846 * 2Meg of VRAM is mapped to 0xf7000000 847 * The page tables are mapped to 0xefc00000 848 * The IOMD is mapped to 0xf6000000 849 * The VIDC is mapped to 0xf6100000 850 * The IOMD/VIDC could be pushed up higher but i havent got 851 * sufficient documentation to do so; the addresses are not 852 * parametized yet and hard to read... better fix this before; 853 * its pretty unforgiving. 854 */ 855 856 /* Initialise the undefined instruction handlers */ 857 #ifdef VERBOSE_INIT_ARM 858 printf("undefined "); 859 #endif 860 undefined_init(); 861 console_flush(); 862 863 /* Load memory into UVM. */ 864 #ifdef VERBOSE_INIT_ARM 865 printf("page "); 866 #endif 867 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 868 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 869 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 870 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 871 872 if (start < physical_freestart) 873 start = physical_freestart; 874 if (end > physical_freeend) 875 end = physical_freeend; 876 877 /* XXX Consider DMA range intersection checking. */ 878 879 uvm_page_physload(atop(start), atop(end), 880 atop(start), atop(end), VM_FREELIST_DEFAULT); 881 } 882 883 /* Boot strap pmap telling it where the kernel page table is */ 884 #ifdef VERBOSE_INIT_ARM 885 printf("pmap "); 886 #endif 887 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 888 console_flush(); 889 890 /* Setup the IRQ system */ 891 #ifdef VERBOSE_INIT_ARM 892 printf("irq "); 893 #endif 894 console_flush(); 895 irq_init(); 896 #ifdef VERBOSE_INIT_ARM 897 printf("done.\n\n"); 898 #endif 899 900 #if NVIDCVIDEO>0 901 consinit(); /* necessary ? */ 902 #endif 903 904 /* Talk to the user */ 905 printf("NetBSD/evbarm booting ... \n"); 906 907 /* Tell the user if his boot loader is too old */ 908 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 909 (bootconfig.version != BOOTCONFIG_VERSION)) { 910 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 911 delay(5000000); 912 } 913 914 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 915 printf("Kernel arg string (@%p) %s\n", 916 bootconfig.args, bootconfig.args); 917 printf("\nBoot configuration structure reports the following " 918 "memory\n"); 919 920 printf(" DRAM block 0a at %08x size %08x " 921 "DRAM block 0b at %08x size %08x\n\r", 922 bootconfig.dram[0].address, 923 bootconfig.dram[0].pages * bootconfig.pagesize, 924 bootconfig.dram[1].address, 925 bootconfig.dram[1].pages * bootconfig.pagesize); 926 printf(" DRAM block 1a at %08x size %08x " 927 "DRAM block 1b at %08x size %08x\n\r", 928 bootconfig.dram[2].address, 929 bootconfig.dram[2].pages * bootconfig.pagesize, 930 bootconfig.dram[3].address, 931 bootconfig.dram[3].pages * bootconfig.pagesize); 932 printf(" VRAM block 0 at %08x size %08x\n\r", 933 bootconfig.vram[0].address, 934 bootconfig.vram[0].pages * bootconfig.pagesize); 935 936 #if NKSYMS || defined(DDB) || defined(MODULAR) 937 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 938 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 939 #endif 940 941 942 #ifdef DDB 943 db_machine_init(); 944 if (boothowto & RB_KDB) 945 Debugger(); 946 #endif /* DDB */ 947 948 /* We return the new stack pointer address */ 949 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 950 } 951 952 953 static void 954 process_kernel_args(void) 955 { 956 char *args; 957 958 /* Ok now we will check the arguments for interesting parameters. */ 959 args = bootconfig.args; 960 boothowto = 0; 961 962 /* Only arguments itself are passed from the new bootloader */ 963 while (*args == ' ') 964 ++args; 965 966 boot_args = args; 967 parse_mi_bootargs(boot_args); 968 parse_rpc_bootargs(boot_args); 969 } 970 971 972 void 973 parse_rpc_bootargs(char *args) 974 { 975 int integer; 976 977 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 978 &integer)) { 979 videodram_size = integer; 980 /* Round to 4K page */ 981 videodram_size *= 1024; 982 videodram_size = round_page(videodram_size); 983 if (videodram_size > 1024*1024) 984 videodram_size = 1024*1024; 985 } 986 } 987 /* End of machdep.c */ 988
Indexes created Wed Oct 22 13:09:56 GMT 2025