eb7500atx_machdep.c revision 1.7.2.3
1 /* $NetBSD: eb7500atx_machdep.c,v 1.7.2.3 2008/01/20 16:04:14 chris 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 1.7.2.3 2008/01/20 16:04:14 chris 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 "ksyms.h" 104 105 /* Kernel text starts at the base of the kernel address space. */ 106 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 107 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 108 109 /* 110 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 111 * Fixed mappings exist from 0xf6000000 - 0xffffffff 112 */ 113 #define KERNEL_VM_SIZE 0x05000000 114 115 /* 116 * Address to call from cpu_reset() to reset the machine. 117 * This is machine architecture dependant as it varies depending 118 * on where the ROM appears when you turn the MMU off. 119 */ 120 u_int cpu_reset_address = 0x0; /* XXX 0x3800000 too for rev0 RiscPC 600 */ 121 122 123 #define VERBOSE_INIT_ARM 124 125 126 /* Define various stack sizes in pages */ 127 #define IRQ_STACK_SIZE 1 128 #define ABT_STACK_SIZE 1 129 #define UND_STACK_SIZE 1 130 131 132 struct bootconfig bootconfig; /* Boot config storage */ 133 videomemory_t videomemory; /* Video memory descriptor */ 134 135 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 136 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 137 138 extern int *vidc_base; 139 extern u_int32_t iomd_base; 140 extern struct bus_space iomd_bs_tag; 141 142 paddr_t physical_start; 143 paddr_t physical_freestart; 144 paddr_t physical_freeend; 145 paddr_t physical_end; 146 paddr_t dma_range_begin; 147 paddr_t dma_range_end; 148 149 u_int free_pages; 150 int physmem = 0; 151 paddr_t memoryblock_end; 152 153 #ifndef PMAP_STATIC_L1S 154 int max_processes = 64; /* Default number */ 155 #endif /* !PMAP_STATIC_L1S */ 156 157 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 158 159 /* Physical and virtual addresses for some global pages */ 160 pv_addr_t systempage; 161 pv_addr_t irqstack; 162 pv_addr_t undstack; 163 pv_addr_t abtstack; 164 pv_addr_t kernelstack; 165 166 paddr_t msgbufphys; 167 168 extern u_int data_abort_handler_address; 169 extern u_int prefetch_abort_handler_address; 170 extern u_int undefined_handler_address; 171 172 #ifdef PMAP_DEBUG 173 extern int pmap_debug_level; 174 #endif /* PMAP_DEBUG */ 175 176 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 177 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 178 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 179 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 180 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 181 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 182 183 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 184 185 struct user *proc0paddr; 186 187 #ifdef CPU_SA110 188 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 189 static vaddr_t sa110_cc_base; 190 #endif /* CPU_SA110 */ 191 192 /* Prototypes */ 193 void physcon_display_base(u_int); 194 extern void consinit(void); 195 196 void data_abort_handler(trapframe_t *); 197 void prefetch_abort_handler(trapframe_t *); 198 void undefinedinstruction_bounce(trapframe_t *frame); 199 200 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 201 static void process_kernel_args(void); 202 203 extern void dump_spl_masks(void); 204 205 void rpc_sa110_cc_setup(void); 206 207 void parse_rpc_bootargs(char *args); 208 209 extern void dumpsys(void); 210 211 212 # define console_flush() /* empty */ 213 214 215 #define panic2(a) do { \ 216 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 217 consinit(); \ 218 panic a; \ 219 } while (/* CONSTCOND */ 0) 220 221 /* 222 * void cpu_reboot(int howto, char *bootstr) 223 * 224 * Reboots the system 225 * 226 * Deal with any syncing, unmounting, dumping and shutdown hooks, 227 * then reset the CPU. 228 */ 229 230 /* NOTE: These variables will be removed, well some of them */ 231 232 extern u_int current_mask; 233 234 void 235 cpu_reboot(int howto, char *bootstr) 236 { 237 238 #ifdef DIAGNOSTIC 239 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 240 241 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 242 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 243 irqmasks[IPL_VM]); 244 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 245 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 246 247 /* dump_spl_masks(); */ 248 #endif /* DIAGNOSTIC */ 249 250 /* 251 * If we are still cold then hit the air brakes 252 * and crash to earth fast 253 */ 254 if (cold) { 255 doshutdownhooks(); 256 printf("Halted while still in the ICE age.\n"); 257 printf("The operating system has halted.\n"); 258 printf("Please press any key to reboot.\n\n"); 259 cngetc(); 260 printf("rebooting...\n"); 261 cpu_reset(); 262 /*NOTREACHED*/ 263 } 264 265 /* Disable console buffering */ 266 cnpollc(1); 267 268 /* 269 * If RB_NOSYNC was not specified sync the discs. 270 * Note: Unless cold is set to 1 here, syslogd will die during 271 * the unmount. It looks like syslogd is getting woken up 272 * only to find that it cannot page part of the binary in as 273 * the filesystem has been unmounted. 274 */ 275 if (!(howto & RB_NOSYNC)) 276 bootsync(); 277 278 /* Say NO to interrupts */ 279 splhigh(); 280 281 /* Do a dump if requested. */ 282 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 283 dumpsys(); 284 285 /* 286 * Auto reboot overload protection 287 * 288 * This code stops the kernel entering an endless loop of reboot 289 * - panic cycles. This will have the effect of stopping further 290 * reboots after it has rebooted 8 times after panics. A clean 291 * halt or reboot will reset the counter. 292 */ 293 294 /* Run any shutdown hooks */ 295 doshutdownhooks(); 296 297 /* Make sure IRQ's are disabled */ 298 IRQdisable; 299 300 if (howto & RB_HALT) { 301 printf("The operating system has halted.\n"); 302 printf("Please press any key to reboot.\n\n"); 303 cngetc(); 304 } 305 306 printf("rebooting...\n"); 307 cpu_reset(); 308 /*NOTREACHED*/ 309 } 310 311 312 /* 313 * u_int initarm(BootConfig *bootconf) 314 * 315 * Initial entry point on startup. This gets called before main() is 316 * entered. 317 * It should be responsible for setting up everything that must be 318 * in place when main is called. 319 * This includes 320 * Taking a copy of the boot configuration structure. 321 * Initialising the physical console so characters can be printed. 322 * Setting up page tables for the kernel 323 * Relocating the kernel to the bottom of physical memory 324 */ 325 326 /* 327 * this part is completely rewritten for the new bootloader ... It features 328 * a flat memory map with a mapping comparable to the EBSA arm32 machine 329 * to boost the portability and likeness of the code 330 */ 331 332 /* 333 * Mapping table for core kernel memory. This memory is mapped at init 334 * time with section mappings. 335 * 336 * XXX One big assumption in the current architecture seems that the kernel is 337 * XXX supposed to be mapped into bootconfig.dram[0]. 338 */ 339 340 #define ONE_MB 0x100000 341 342 struct l1_sec_map { 343 vaddr_t va; 344 paddr_t pa; 345 vsize_t size; 346 vm_prot_t prot; 347 int cache; 348 } l1_sec_table[] = { 349 /* Map 1Mb section for VIDC20 */ 350 { VIDC_BASE, VIDC_HW_BASE, 351 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 352 PTE_NOCACHE }, 353 354 /* Map 1Mb section from IOMD */ 355 { IOMD_BASE, IOMD_HW_BASE, 356 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 357 PTE_NOCACHE }, 358 359 /* Map 1Mb of COMBO (and module space) */ 360 { IO_BASE, IO_HW_BASE, 361 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 362 PTE_NOCACHE }, 363 { 0, 0, 0, 0, 0 } 364 }; 365 366 367 static void 368 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 369 { 370 /* check for bootconfig v2+ structure */ 371 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 372 /* v2+ cleaned up structure found */ 373 *bootconf = *raw_bootconf; 374 return; 375 } else { 376 panic2(("Internal error: no valid bootconfig block found")); 377 } 378 } 379 380 381 u_int 382 initarm(void *cookie) 383 { 384 struct bootconfig *raw_bootconf = cookie; 385 int loop; 386 int loop1; 387 u_int logical; 388 u_int kerneldatasize; 389 u_int l1pagetable; 390 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 391 pv_addr_t kernel_l1pt = { {0} }; 392 393 /* 394 * Heads up ... Setup the CPU / MMU / TLB functions 395 */ 396 set_cpufuncs(); 397 398 /* canonicalise the boot configuration structure to alow versioning */ 399 canonicalise_bootconfig(&bootconfig, raw_bootconf); 400 booted_kernel = bootconfig.kernelname; 401 402 /* if the wscons interface is used, switch off VERBOSE booting :( */ 403 #if NVIDCVIDEO>0 404 # undef VERBOSE_INIT_ARM 405 # undef PMAP_DEBUG 406 #endif 407 408 /* 409 * Initialise the video memory descriptor 410 * 411 * Note: all references to the video memory virtual/physical address 412 * should go via this structure. 413 */ 414 415 /* Hardwire it on the place the bootloader tells us */ 416 videomemory.vidm_vbase = bootconfig.display_start; 417 videomemory.vidm_pbase = bootconfig.display_phys; 418 videomemory.vidm_size = bootconfig.display_size; 419 if (bootconfig.vram[0].pages) 420 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 421 else 422 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 423 vidc_base = (int *) VIDC_HW_BASE; 424 iomd_base = IOMD_HW_BASE; 425 426 /* 427 * Initialise the physical console 428 * This is done in main() but for the moment we do it here so that 429 * we can use printf in initarm() before main() has been called. 430 * only for `vidcconsole!' ... not wscons 431 */ 432 #if NVIDCVIDEO == 0 433 consinit(); 434 #endif 435 436 /* 437 * Initialise the diagnostic serial console 438 * This allows a means of generating output during initarm(). 439 * Once all the memory map changes are complete we can call consinit() 440 * and not have to worry about things moving. 441 */ 442 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 443 /* XXX snif .... i am still not able to this */ 444 445 /* 446 * We have the following memory map (derived from EBSA) 447 * 448 * virtual address == physical address apart from the areas: 449 * 0x00000000 -> 0x000fffff which is mapped to 450 * top 1MB of physical memory 451 * 0xf0000000 -> 0xf0ffffff wich is mapped to 452 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 453 * 454 * This means that the kernel is mapped suitably for continuing 455 * execution, all I/O is mapped 1:1 virtual to physical and 456 * physical memory is accessible. 457 * 458 * The initarm() has the responsibility for creating the kernel 459 * page tables. 460 * It must also set up various memory pointers that are used 461 * by pmap etc. 462 */ 463 464 /* START OF REAL NEW STUFF */ 465 466 /* Check to make sure the page size is correct */ 467 if (PAGE_SIZE != bootconfig.pagesize) 468 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 469 bootconfig.pagesize, PAGE_SIZE)); 470 471 /* process arguments */ 472 process_kernel_args(); 473 474 475 /* 476 * Now set up the page tables for the kernel ... this part is copied 477 * in a (modified?) way from the EBSA machine port.... 478 */ 479 480 #ifdef VERBOSE_INIT_ARM 481 printf("Allocating page tables\n"); 482 #endif 483 /* 484 * Set up the variables that define the availablilty of physical 485 * memory 486 */ 487 physical_start = 0xffffffff; 488 physical_end = 0; 489 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 490 if (bootconfig.dram[loop].address < physical_start) 491 physical_start = bootconfig.dram[loop].address; 492 memoryblock_end = bootconfig.dram[loop].address + 493 bootconfig.dram[loop].pages * PAGE_SIZE; 494 if (memoryblock_end > physical_end) 495 physical_end = memoryblock_end; 496 physmem += bootconfig.dram[loop].pages; 497 }; 498 /* constants for now, but might be changed/configured */ 499 dma_range_begin = (paddr_t) physical_start; 500 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 501 /* XXX HACK HACK XXX */ 502 /* dma_range_end = 0x18000000; */ 503 504 if (physical_start != bootconfig.dram[0].address) { 505 int oldblocks = 0; 506 507 /* 508 * must be a kinetic, as it's the only thing to shuffle memory 509 * around 510 */ 511 /* hack hack - throw away the slow dram */ 512 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 513 if (bootconfig.dram[loop].address < 514 bootconfig.dram[0].address) { 515 /* non kinetic ram */ 516 bootconfig.dram[loop].address = 0; 517 physmem -= bootconfig.dram[loop].pages; 518 bootconfig.drampages -= 519 bootconfig.dram[loop].pages; 520 bootconfig.dram[loop].pages = 0; 521 oldblocks++; 522 } 523 } 524 physical_start = bootconfig.dram[0].address; 525 bootconfig.dramblocks -= oldblocks; 526 } 527 528 physical_freestart = physical_start; 529 free_pages = bootconfig.drampages; 530 physical_freeend = physical_end; 531 532 533 /* 534 * AHUM !! set this variable ... it was set up in the old 1st 535 * stage bootloader 536 */ 537 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 538 539 /* Update the address of the first free page of physical memory */ 540 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 541 physical_freestart += 542 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 543 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 544 545 /* Define a macro to simplify memory allocation */ 546 #define valloc_pages(var, np) \ 547 alloc_pages((var).pv_pa, (np)); \ 548 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 549 550 #define alloc_pages(var, np) \ 551 (var) = physical_freestart; \ 552 physical_freestart += ((np) * PAGE_SIZE); \ 553 free_pages -= (np); \ 554 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 555 556 loop1 = 0; 557 kernel_l1pt.pv_pa = 0; 558 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 559 /* Are we 16KB aligned for an L1 ? */ 560 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 561 && kernel_l1pt.pv_pa == 0) { 562 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 563 } else { 564 valloc_pages(kernel_pt_table[loop1], 565 L2_TABLE_SIZE / PAGE_SIZE); 566 ++loop1; 567 } 568 } 569 570 571 #ifdef DIAGNOSTIC 572 /* This should never be able to happen but better confirm that. */ 573 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 574 panic2(("initarm: Failed to align the kernel page " 575 "directory\n")); 576 #endif 577 578 /* 579 * Allocate a page for the system page mapped to V0x00000000 580 * This page will just contain the system vectors and can be 581 * shared by all processes. 582 */ 583 alloc_pages(systempage.pv_pa, 1); 584 585 /* Allocate stacks for all modes */ 586 valloc_pages(irqstack, IRQ_STACK_SIZE); 587 valloc_pages(abtstack, ABT_STACK_SIZE); 588 valloc_pages(undstack, UND_STACK_SIZE); 589 valloc_pages(kernelstack, UPAGES); 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Setting up stacks :\n"); 593 printf("IRQ stack: p0x%08lx v0x%08lx\n", 594 irqstack.pv_pa, irqstack.pv_va); 595 printf("ABT stack: p0x%08lx v0x%08lx\n", 596 abtstack.pv_pa, abtstack.pv_va); 597 printf("UND stack: p0x%08lx v0x%08lx\n", 598 undstack.pv_pa, undstack.pv_va); 599 printf("SVC stack: p0x%08lx v0x%08lx\n", 600 kernelstack.pv_pa, kernelstack.pv_va); 601 printf("\n"); 602 #endif 603 604 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 605 606 #ifdef CPU_SA110 607 /* 608 * XXX totally stuffed hack to work round problems introduced 609 * in recent versions of the pmap code. Due to the calls used there 610 * we cannot allocate virtual memory during bootstrap. 611 */ 612 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 613 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 614 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 615 #endif /* CPU_SA110 */ 616 617 /* 618 * Ok we have allocated physical pages for the primary kernel 619 * page tables 620 */ 621 622 #ifdef VERBOSE_INIT_ARM 623 printf("Creating L1 page table\n"); 624 #endif 625 626 /* 627 * Now we start construction of the L1 page table 628 * We start by mapping the L2 page tables into the L1. 629 * This means that we can replace L1 mappings later on if necessary 630 */ 631 l1pagetable = kernel_l1pt.pv_pa; 632 633 /* Map the L2 pages tables in the L1 page table */ 634 pmap_link_l2pt(l1pagetable, 0x00000000, 635 &kernel_pt_table[KERNEL_PT_SYS]); 636 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 637 &kernel_pt_table[KERNEL_PT_KERNEL]); 638 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 639 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 640 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 641 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 642 &kernel_pt_table[KERNEL_PT_VMEM]); 643 644 /* update the top of the kernel VM */ 645 pmap_curmaxkvaddr = 646 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 647 648 #ifdef VERBOSE_INIT_ARM 649 printf("Mapping kernel\n"); 650 #endif 651 652 /* Now we fill in the L2 pagetable for the kernel code/data */ 653 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 654 /* 655 * The defines are a workaround for a recent problem that occurred 656 * with ARM 610 processors and some ARM 710 processors 657 * Other ARM 710 and StrongARM processors don't have a problem. 658 */ 659 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 660 #if defined(CPU_ARM6) || defined(CPU_ARM7) 661 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 662 physical_start, kernexec->a_text, 663 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 664 #else /* CPU_ARM6 || CPU_ARM7 */ 665 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 666 physical_start, kernexec->a_text, 667 VM_PROT_READ, PTE_CACHE); 668 #endif /* CPU_ARM6 || CPU_ARM7 */ 669 logical += pmap_map_chunk(l1pagetable, 670 KERNEL_TEXT_BASE + logical, physical_start + logical, 671 kerneldatasize - kernexec->a_text, 672 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 673 } else { /* !ZMAGIC */ 674 /* 675 * Most likely an ELF kernel ... 676 * XXX no distinction yet between read only and 677 * read/write area's ... 678 */ 679 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 680 physical_start, kerneldatasize, 681 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 }; 683 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("Constructing L2 page tables\n"); 687 #endif 688 689 /* Map the stack pages */ 690 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 691 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 692 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 693 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 694 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 695 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 696 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 697 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 698 699 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 700 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 701 702 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 703 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 704 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 705 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 706 } 707 708 /* Now we fill in the L2 pagetable for the VRAM */ 709 /* 710 * Current architectures mean that the VRAM is always in 1 711 * continuous bank. This means that we can just map the 2 meg 712 * that the VRAM would occupy. In theory we don't need a page 713 * table for VRAM, we could section map it but we would need 714 * the page tables if DRAM was in use. 715 * XXX please map two adjacent virtual areas to ONE physical 716 * area 717 */ 718 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 719 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 720 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 721 videomemory.vidm_pbase, videomemory.vidm_size, 722 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 723 724 /* Map the vector page. */ 725 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 726 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 727 728 /* Map the core memory needed before autoconfig */ 729 loop = 0; 730 while (l1_sec_table[loop].size) { 731 vm_size_t sz; 732 733 #ifdef VERBOSE_INIT_ARM 734 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 735 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 736 l1_sec_table[loop].va); 737 #endif 738 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 739 pmap_map_section(l1pagetable, 740 l1_sec_table[loop].va + sz, 741 l1_sec_table[loop].pa + sz, 742 l1_sec_table[loop].prot, 743 l1_sec_table[loop].cache); 744 ++loop; 745 } 746 747 /* 748 * Now we have the real page tables in place so we can switch 749 * to them. Once this is done we will be running with the 750 * REAL kernel page tables. 751 */ 752 753 /* Switch tables */ 754 #ifdef VERBOSE_INIT_ARM 755 printf("switching to new L1 page table\n"); 756 #endif 757 #ifdef VERBOSE_INIT_ARM 758 printf("switching domains\n"); 759 #endif 760 /* be a client to all domains */ 761 cpu_domains(0x55555555); 762 763 setttb(kernel_l1pt.pv_pa); 764 765 /* 766 * We must now clean the cache again.... 767 * Cleaning may be done by reading new data to displace any 768 * dirty data in the cache. This will have happened in setttb() 769 * but since we are boot strapping the addresses used for the read 770 * may have just been remapped and thus the cache could be out 771 * of sync. A re-clean after the switch will cure this. 772 * After booting there are no gross reloations of the kernel thus 773 * this problem will not occur after initarm(). 774 */ 775 cpu_idcache_wbinv_all(); 776 cpu_tlb_flushID(); 777 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 778 779 /* 780 * Moved from cpu_startup() as data_abort_handler() references 781 * this during uvm init 782 */ 783 proc0paddr = (struct user *)kernelstack.pv_va; 784 lwp0.l_addr = proc0paddr; 785 786 /* 787 * if there is support for a serial console ...we should now 788 * reattach it 789 */ 790 /* fcomcndetach();*/ 791 792 /* 793 * Reflect videomemory relocation in the videomemory structure 794 * and reinit console 795 */ 796 if (bootconfig.vram[0].pages == 0) { 797 videomemory.vidm_vbase = VMEM_VBASE; 798 } else { 799 videomemory.vidm_vbase = VMEM_VBASE; 800 bootconfig.display_start = VMEM_VBASE; 801 }; 802 vidc_base = (int *) VIDC_BASE; 803 iomd_base = IOMD_BASE; 804 805 #ifdef VERBOSE_INIT_ARM 806 printf("running on the new L1 page table!\n"); 807 printf("done.\n"); 808 #endif 809 810 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 811 812 #ifdef VERBOSE_INIT_ARM 813 printf("\n"); 814 #endif 815 816 /* 817 * Pages were allocated during the secondary bootstrap for the 818 * stacks for different CPU modes. 819 * We must now set the r13 registers in the different CPU modes to 820 * point to these stacks. 821 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 822 * of the stack memory. 823 */ 824 #ifdef VERBOSE_INIT_ARM 825 printf("init subsystems: stacks "); 826 console_flush(); 827 #endif 828 829 set_stackptr(PSR_IRQ32_MODE, 830 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 831 set_stackptr(PSR_ABT32_MODE, 832 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 833 set_stackptr(PSR_UND32_MODE, 834 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 835 #ifdef PMAP_DEBUG 836 if (pmap_debug_level >= 0) 837 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 838 kernelstack.pv_pa); 839 #endif /* PMAP_DEBUG */ 840 841 /* 842 * Well we should set a data abort handler. 843 * Once things get going this will change as we will need a proper 844 * handler. Until then we will use a handler that just panics but 845 * tells us why. 846 * Initialisation of the vectors will just panic on a data abort. 847 * This just fills in a slightly better one. 848 */ 849 #ifdef VERBOSE_INIT_ARM 850 printf("vectors "); 851 #endif 852 data_abort_handler_address = (u_int)data_abort_handler; 853 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 854 undefined_handler_address = (u_int)undefinedinstruction_bounce; 855 console_flush(); 856 857 858 /* 859 * At last ! 860 * We now have the kernel in physical memory from the bottom upwards. 861 * Kernel page tables are physically above this. 862 * The kernel is mapped to 0xf0000000 863 * The kernel data PTs will handle the mapping of 864 * 0xf1000000-0xf5ffffff (80 Mb) 865 * 2Meg of VRAM is mapped to 0xf7000000 866 * The page tables are mapped to 0xefc00000 867 * The IOMD is mapped to 0xf6000000 868 * The VIDC is mapped to 0xf6100000 869 * The IOMD/VIDC could be pushed up higher but i havent got 870 * sufficient documentation to do so; the addresses are not 871 * parametized yet and hard to read... better fix this before; 872 * its pretty unforgiving. 873 */ 874 875 /* Initialise the undefined instruction handlers */ 876 #ifdef VERBOSE_INIT_ARM 877 printf("undefined "); 878 #endif 879 undefined_init(); 880 console_flush(); 881 882 /* Load memory into UVM. */ 883 #ifdef VERBOSE_INIT_ARM 884 printf("page "); 885 #endif 886 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 887 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 888 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 889 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 890 891 if (start < physical_freestart) 892 start = physical_freestart; 893 if (end > physical_freeend) 894 end = physical_freeend; 895 896 /* XXX Consider DMA range intersection checking. */ 897 898 uvm_page_physload(atop(start), atop(end), 899 atop(start), atop(end), VM_FREELIST_DEFAULT); 900 } 901 902 /* Boot strap pmap telling it where the kernel page table is */ 903 #ifdef VERBOSE_INIT_ARM 904 printf("pmap "); 905 #endif 906 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 907 KERNEL_VM_BASE + KERNEL_VM_SIZE); 908 console_flush(); 909 910 /* Setup the IRQ system */ 911 #ifdef VERBOSE_INIT_ARM 912 printf("irq "); 913 #endif 914 console_flush(); 915 irq_init(); 916 #ifdef VERBOSE_INIT_ARM 917 printf("done.\n\n"); 918 #endif 919 920 #if NVIDCVIDEO>0 921 consinit(); /* necessary ? */ 922 #endif 923 924 /* Talk to the user */ 925 printf("NetBSD/evbarm booting ... \n"); 926 927 /* Tell the user if his boot loader is too old */ 928 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 929 (bootconfig.version != BOOTCONFIG_VERSION)) { 930 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 931 delay(5000000); 932 } 933 934 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 935 printf("Kernel arg string (@%p) %s\n", 936 bootconfig.args, bootconfig.args); 937 printf("\nBoot configuration structure reports the following " 938 "memory\n"); 939 940 printf(" DRAM block 0a at %08x size %08x " 941 "DRAM block 0b at %08x size %08x\n\r", 942 bootconfig.dram[0].address, 943 bootconfig.dram[0].pages * bootconfig.pagesize, 944 bootconfig.dram[1].address, 945 bootconfig.dram[1].pages * bootconfig.pagesize); 946 printf(" DRAM block 1a at %08x size %08x " 947 "DRAM block 1b at %08x size %08x\n\r", 948 bootconfig.dram[2].address, 949 bootconfig.dram[2].pages * bootconfig.pagesize, 950 bootconfig.dram[3].address, 951 bootconfig.dram[3].pages * bootconfig.pagesize); 952 printf(" VRAM block 0 at %08x size %08x\n\r", 953 bootconfig.vram[0].address, 954 bootconfig.vram[0].pages * bootconfig.pagesize); 955 956 #if NKSYMS || defined(DDB) || defined(LKM) 957 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 958 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 959 #endif 960 961 962 #ifdef DDB 963 db_machine_init(); 964 if (boothowto & RB_KDB) 965 Debugger(); 966 #endif /* DDB */ 967 968 /* We return the new stack pointer address */ 969 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 970 } 971 972 973 static void 974 process_kernel_args(void) 975 { 976 char *args; 977 978 /* Ok now we will check the arguments for interesting parameters. */ 979 args = bootconfig.args; 980 boothowto = 0; 981 982 /* Only arguments itself are passed from the new bootloader */ 983 while (*args == ' ') 984 ++args; 985 986 boot_args = args; 987 parse_mi_bootargs(boot_args); 988 parse_rpc_bootargs(boot_args); 989 } 990 991 992 void 993 parse_rpc_bootargs(char *args) 994 { 995 int integer; 996 997 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 998 &integer)) { 999 videodram_size = integer; 1000 /* Round to 4K page */ 1001 videodram_size *= 1024; 1002 videodram_size = round_page(videodram_size); 1003 if (videodram_size > 1024*1024) 1004 videodram_size = 1024*1024; 1005 } 1006 } 1007 /* End of machdep.c */ 1008
Indexes created Wed Oct 22 13:09:56 GMT 2025