eb7500atx_machdep.c revision 1.6.24.1
1 /* $NetBSD: eb7500atx_machdep.c,v 1.6.24.1 2008/02/28 21:47:37 rjs 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 1.6.24.1 2008/02/28 21:47:37 rjs 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 spl_mask; 233 extern u_int current_mask; 234 235 void 236 cpu_reboot(int howto, char *bootstr) 237 { 238 239 #ifdef DIAGNOSTIC 240 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 241 242 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 243 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 244 irqmasks[IPL_VM]); 245 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 246 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 247 248 /* dump_spl_masks(); */ 249 #endif /* DIAGNOSTIC */ 250 251 /* 252 * If we are still cold then hit the air brakes 253 * and crash to earth fast 254 */ 255 if (cold) { 256 doshutdownhooks(); 257 printf("Halted while still in the ICE age.\n"); 258 printf("The operating system has halted.\n"); 259 printf("Please press any key to reboot.\n\n"); 260 cngetc(); 261 printf("rebooting...\n"); 262 cpu_reset(); 263 /*NOTREACHED*/ 264 } 265 266 /* Disable console buffering */ 267 cnpollc(1); 268 269 /* 270 * If RB_NOSYNC was not specified sync the discs. 271 * Note: Unless cold is set to 1 here, syslogd will die during 272 * the unmount. It looks like syslogd is getting woken up 273 * only to find that it cannot page part of the binary in as 274 * the filesystem has been unmounted. 275 */ 276 if (!(howto & RB_NOSYNC)) 277 bootsync(); 278 279 /* Say NO to interrupts */ 280 splhigh(); 281 282 /* Do a dump if requested. */ 283 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 284 dumpsys(); 285 286 /* 287 * Auto reboot overload protection 288 * 289 * This code stops the kernel entering an endless loop of reboot 290 * - panic cycles. This will have the effect of stopping further 291 * reboots after it has rebooted 8 times after panics. A clean 292 * halt or reboot will reset the counter. 293 */ 294 295 /* Run any shutdown hooks */ 296 doshutdownhooks(); 297 298 /* Make sure IRQ's are disabled */ 299 IRQdisable; 300 301 if (howto & RB_HALT) { 302 printf("The operating system has halted.\n"); 303 printf("Please press any key to reboot.\n\n"); 304 cngetc(); 305 } 306 307 printf("rebooting...\n"); 308 cpu_reset(); 309 /*NOTREACHED*/ 310 } 311 312 313 /* 314 * u_int initarm(BootConfig *bootconf) 315 * 316 * Initial entry point on startup. This gets called before main() is 317 * entered. 318 * It should be responsible for setting up everything that must be 319 * in place when main is called. 320 * This includes 321 * Taking a copy of the boot configuration structure. 322 * Initialising the physical console so characters can be printed. 323 * Setting up page tables for the kernel 324 * Relocating the kernel to the bottom of physical memory 325 */ 326 327 /* 328 * this part is completely rewritten for the new bootloader ... It features 329 * a flat memory map with a mapping comparable to the EBSA arm32 machine 330 * to boost the portability and likeness of the code 331 */ 332 333 /* 334 * Mapping table for core kernel memory. This memory is mapped at init 335 * time with section mappings. 336 * 337 * XXX One big assumption in the current architecture seems that the kernel is 338 * XXX supposed to be mapped into bootconfig.dram[0]. 339 */ 340 341 #define ONE_MB 0x100000 342 343 struct l1_sec_map { 344 vaddr_t va; 345 paddr_t pa; 346 vsize_t size; 347 vm_prot_t prot; 348 int cache; 349 } l1_sec_table[] = { 350 /* Map 1Mb section for VIDC20 */ 351 { VIDC_BASE, VIDC_HW_BASE, 352 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 353 PTE_NOCACHE }, 354 355 /* Map 1Mb section from IOMD */ 356 { IOMD_BASE, IOMD_HW_BASE, 357 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 358 PTE_NOCACHE }, 359 360 /* Map 1Mb of COMBO (and module space) */ 361 { IO_BASE, IO_HW_BASE, 362 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 363 PTE_NOCACHE }, 364 { 0, 0, 0, 0, 0 } 365 }; 366 367 368 static void 369 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 370 { 371 /* check for bootconfig v2+ structure */ 372 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 373 /* v2+ cleaned up structure found */ 374 *bootconf = *raw_bootconf; 375 return; 376 } else { 377 panic2(("Internal error: no valid bootconfig block found")); 378 } 379 } 380 381 382 u_int 383 initarm(void *cookie) 384 { 385 struct bootconfig *raw_bootconf = cookie; 386 int loop; 387 int loop1; 388 u_int logical; 389 u_int kerneldatasize; 390 u_int l1pagetable; 391 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 392 pv_addr_t kernel_l1pt = { {0} }; 393 394 /* 395 * Heads up ... Setup the CPU / MMU / TLB functions 396 */ 397 set_cpufuncs(); 398 399 /* canonicalise the boot configuration structure to alow versioning */ 400 canonicalise_bootconfig(&bootconfig, raw_bootconf); 401 booted_kernel = bootconfig.kernelname; 402 403 /* if the wscons interface is used, switch off VERBOSE booting :( */ 404 #if NVIDCVIDEO>0 405 # undef VERBOSE_INIT_ARM 406 # undef PMAP_DEBUG 407 #endif 408 409 /* 410 * Initialise the video memory descriptor 411 * 412 * Note: all references to the video memory virtual/physical address 413 * should go via this structure. 414 */ 415 416 /* Hardwire it on the place the bootloader tells us */ 417 videomemory.vidm_vbase = bootconfig.display_start; 418 videomemory.vidm_pbase = bootconfig.display_phys; 419 videomemory.vidm_size = bootconfig.display_size; 420 if (bootconfig.vram[0].pages) 421 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 422 else 423 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 424 vidc_base = (int *) VIDC_HW_BASE; 425 iomd_base = IOMD_HW_BASE; 426 427 /* 428 * Initialise the physical console 429 * This is done in main() but for the moment we do it here so that 430 * we can use printf in initarm() before main() has been called. 431 * only for `vidcconsole!' ... not wscons 432 */ 433 #if NVIDCVIDEO == 0 434 consinit(); 435 #endif 436 437 /* 438 * Initialise the diagnostic serial console 439 * This allows a means of generating output during initarm(). 440 * Once all the memory map changes are complete we can call consinit() 441 * and not have to worry about things moving. 442 */ 443 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 444 /* XXX snif .... i am still not able to this */ 445 446 /* 447 * We have the following memory map (derived from EBSA) 448 * 449 * virtual address == physical address apart from the areas: 450 * 0x00000000 -> 0x000fffff which is mapped to 451 * top 1MB of physical memory 452 * 0xf0000000 -> 0xf0ffffff wich is mapped to 453 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 454 * 455 * This means that the kernel is mapped suitably for continuing 456 * execution, all I/O is mapped 1:1 virtual to physical and 457 * physical memory is accessible. 458 * 459 * The initarm() has the responsibility for creating the kernel 460 * page tables. 461 * It must also set up various memory pointers that are used 462 * by pmap etc. 463 */ 464 465 /* START OF REAL NEW STUFF */ 466 467 /* Check to make sure the page size is correct */ 468 if (PAGE_SIZE != bootconfig.pagesize) 469 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 470 bootconfig.pagesize, PAGE_SIZE)); 471 472 /* process arguments */ 473 process_kernel_args(); 474 475 476 /* 477 * Now set up the page tables for the kernel ... this part is copied 478 * in a (modified?) way from the EBSA machine port.... 479 */ 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("Allocating page tables\n"); 483 #endif 484 /* 485 * Set up the variables that define the availablilty of physical 486 * memory 487 */ 488 physical_start = 0xffffffff; 489 physical_end = 0; 490 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 491 if (bootconfig.dram[loop].address < physical_start) 492 physical_start = bootconfig.dram[loop].address; 493 memoryblock_end = bootconfig.dram[loop].address + 494 bootconfig.dram[loop].pages * PAGE_SIZE; 495 if (memoryblock_end > physical_end) 496 physical_end = memoryblock_end; 497 physmem += bootconfig.dram[loop].pages; 498 }; 499 /* constants for now, but might be changed/configured */ 500 dma_range_begin = (paddr_t) physical_start; 501 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 502 /* XXX HACK HACK XXX */ 503 /* dma_range_end = 0x18000000; */ 504 505 if (physical_start != bootconfig.dram[0].address) { 506 int oldblocks = 0; 507 508 /* 509 * must be a kinetic, as it's the only thing to shuffle memory 510 * around 511 */ 512 /* hack hack - throw away the slow dram */ 513 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 514 if (bootconfig.dram[loop].address < 515 bootconfig.dram[0].address) { 516 /* non kinetic ram */ 517 bootconfig.dram[loop].address = 0; 518 physmem -= bootconfig.dram[loop].pages; 519 bootconfig.drampages -= 520 bootconfig.dram[loop].pages; 521 bootconfig.dram[loop].pages = 0; 522 oldblocks++; 523 } 524 } 525 physical_start = bootconfig.dram[0].address; 526 bootconfig.dramblocks -= oldblocks; 527 } 528 529 physical_freestart = physical_start; 530 free_pages = bootconfig.drampages; 531 physical_freeend = physical_end; 532 533 534 /* 535 * AHUM !! set this variable ... it was set up in the old 1st 536 * stage bootloader 537 */ 538 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 539 540 /* Update the address of the first free page of physical memory */ 541 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 542 physical_freestart += 543 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 544 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 545 546 /* Define a macro to simplify memory allocation */ 547 #define valloc_pages(var, np) \ 548 alloc_pages((var).pv_pa, (np)); \ 549 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 550 551 #define alloc_pages(var, np) \ 552 (var) = physical_freestart; \ 553 physical_freestart += ((np) * PAGE_SIZE); \ 554 free_pages -= (np); \ 555 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 556 557 loop1 = 0; 558 kernel_l1pt.pv_pa = 0; 559 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 560 /* Are we 16KB aligned for an L1 ? */ 561 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 562 && kernel_l1pt.pv_pa == 0) { 563 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 564 } else { 565 valloc_pages(kernel_pt_table[loop1], 566 L2_TABLE_SIZE / PAGE_SIZE); 567 ++loop1; 568 } 569 } 570 571 572 #ifdef DIAGNOSTIC 573 /* This should never be able to happen but better confirm that. */ 574 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 575 panic2(("initarm: Failed to align the kernel page " 576 "directory\n")); 577 #endif 578 579 /* 580 * Allocate a page for the system page mapped to V0x00000000 581 * This page will just contain the system vectors and can be 582 * shared by all processes. 583 */ 584 alloc_pages(systempage.pv_pa, 1); 585 586 /* Allocate stacks for all modes */ 587 valloc_pages(irqstack, IRQ_STACK_SIZE); 588 valloc_pages(abtstack, ABT_STACK_SIZE); 589 valloc_pages(undstack, UND_STACK_SIZE); 590 valloc_pages(kernelstack, UPAGES); 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("Setting up stacks :\n"); 594 printf("IRQ stack: p0x%08lx v0x%08lx\n", 595 irqstack.pv_pa, irqstack.pv_va); 596 printf("ABT stack: p0x%08lx v0x%08lx\n", 597 abtstack.pv_pa, abtstack.pv_va); 598 printf("UND stack: p0x%08lx v0x%08lx\n", 599 undstack.pv_pa, undstack.pv_va); 600 printf("SVC stack: p0x%08lx v0x%08lx\n", 601 kernelstack.pv_pa, kernelstack.pv_va); 602 printf("\n"); 603 #endif 604 605 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 606 607 #ifdef CPU_SA110 608 /* 609 * XXX totally stuffed hack to work round problems introduced 610 * in recent versions of the pmap code. Due to the calls used there 611 * we cannot allocate virtual memory during bootstrap. 612 */ 613 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 614 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 615 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 616 #endif /* CPU_SA110 */ 617 618 /* 619 * Ok we have allocated physical pages for the primary kernel 620 * page tables 621 */ 622 623 #ifdef VERBOSE_INIT_ARM 624 printf("Creating L1 page table\n"); 625 #endif 626 627 /* 628 * Now we start construction of the L1 page table 629 * We start by mapping the L2 page tables into the L1. 630 * This means that we can replace L1 mappings later on if necessary 631 */ 632 l1pagetable = kernel_l1pt.pv_pa; 633 634 /* Map the L2 pages tables in the L1 page table */ 635 pmap_link_l2pt(l1pagetable, 0x00000000, 636 &kernel_pt_table[KERNEL_PT_SYS]); 637 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 638 &kernel_pt_table[KERNEL_PT_KERNEL]); 639 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 640 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 641 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 642 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 643 &kernel_pt_table[KERNEL_PT_VMEM]); 644 645 /* update the top of the kernel VM */ 646 pmap_curmaxkvaddr = 647 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 648 649 #ifdef VERBOSE_INIT_ARM 650 printf("Mapping kernel\n"); 651 #endif 652 653 /* Now we fill in the L2 pagetable for the kernel code/data */ 654 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 655 /* 656 * The defines are a workaround for a recent problem that occurred 657 * with ARM 610 processors and some ARM 710 processors 658 * Other ARM 710 and StrongARM processors don't have a problem. 659 */ 660 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 661 #if defined(CPU_ARM6) || defined(CPU_ARM7) 662 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 663 physical_start, kernexec->a_text, 664 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 665 #else /* CPU_ARM6 || CPU_ARM7 */ 666 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 667 physical_start, kernexec->a_text, 668 VM_PROT_READ, PTE_CACHE); 669 #endif /* CPU_ARM6 || CPU_ARM7 */ 670 logical += pmap_map_chunk(l1pagetable, 671 KERNEL_TEXT_BASE + logical, physical_start + logical, 672 kerneldatasize - kernexec->a_text, 673 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 } else { /* !ZMAGIC */ 675 /* 676 * Most likely an ELF kernel ... 677 * XXX no distinction yet between read only and 678 * read/write area's ... 679 */ 680 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 681 physical_start, kerneldatasize, 682 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 683 }; 684 685 686 #ifdef VERBOSE_INIT_ARM 687 printf("Constructing L2 page tables\n"); 688 #endif 689 690 /* Map the stack pages */ 691 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 692 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 693 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 694 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 695 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 696 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 697 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 698 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 699 700 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 701 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 702 703 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 704 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 705 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 706 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 707 } 708 709 /* Now we fill in the L2 pagetable for the VRAM */ 710 /* 711 * Current architectures mean that the VRAM is always in 1 712 * continuous bank. This means that we can just map the 2 meg 713 * that the VRAM would occupy. In theory we don't need a page 714 * table for VRAM, we could section map it but we would need 715 * the page tables if DRAM was in use. 716 * XXX please map two adjacent virtual areas to ONE physical 717 * area 718 */ 719 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 720 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 721 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 722 videomemory.vidm_pbase, videomemory.vidm_size, 723 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 724 725 /* Map the vector page. */ 726 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 727 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 728 729 /* Map the core memory needed before autoconfig */ 730 loop = 0; 731 while (l1_sec_table[loop].size) { 732 vm_size_t sz; 733 734 #ifdef VERBOSE_INIT_ARM 735 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 736 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 737 l1_sec_table[loop].va); 738 #endif 739 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 740 pmap_map_section(l1pagetable, 741 l1_sec_table[loop].va + sz, 742 l1_sec_table[loop].pa + sz, 743 l1_sec_table[loop].prot, 744 l1_sec_table[loop].cache); 745 ++loop; 746 } 747 748 /* 749 * Now we have the real page tables in place so we can switch 750 * to them. Once this is done we will be running with the 751 * REAL kernel page tables. 752 */ 753 754 /* Switch tables */ 755 #ifdef VERBOSE_INIT_ARM 756 printf("switching to new L1 page table\n"); 757 #endif 758 #ifdef VERBOSE_INIT_ARM 759 printf("switching domains\n"); 760 #endif 761 /* be a client to all domains */ 762 cpu_domains(0x55555555); 763 764 setttb(kernel_l1pt.pv_pa); 765 766 /* 767 * We must now clean the cache again.... 768 * Cleaning may be done by reading new data to displace any 769 * dirty data in the cache. This will have happened in setttb() 770 * but since we are boot strapping the addresses used for the read 771 * may have just been remapped and thus the cache could be out 772 * of sync. A re-clean after the switch will cure this. 773 * After booting there are no gross reloations of the kernel thus 774 * this problem will not occur after initarm(). 775 */ 776 cpu_idcache_wbinv_all(); 777 cpu_tlb_flushID(); 778 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 779 780 /* 781 * Moved from cpu_startup() as data_abort_handler() references 782 * this during uvm init 783 */ 784 proc0paddr = (struct user *)kernelstack.pv_va; 785 lwp0.l_addr = proc0paddr; 786 787 /* 788 * if there is support for a serial console ...we should now 789 * reattach it 790 */ 791 /* fcomcndetach();*/ 792 793 /* 794 * Reflect videomemory relocation in the videomemory structure 795 * and reinit console 796 */ 797 if (bootconfig.vram[0].pages == 0) { 798 videomemory.vidm_vbase = VMEM_VBASE; 799 } else { 800 videomemory.vidm_vbase = VMEM_VBASE; 801 bootconfig.display_start = VMEM_VBASE; 802 }; 803 vidc_base = (int *) VIDC_BASE; 804 iomd_base = IOMD_BASE; 805 806 #ifdef VERBOSE_INIT_ARM 807 printf("running on the new L1 page table!\n"); 808 printf("done.\n"); 809 #endif 810 811 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 812 813 #ifdef VERBOSE_INIT_ARM 814 printf("\n"); 815 #endif 816 817 /* 818 * Pages were allocated during the secondary bootstrap for the 819 * stacks for different CPU modes. 820 * We must now set the r13 registers in the different CPU modes to 821 * point to these stacks. 822 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 823 * of the stack memory. 824 */ 825 #ifdef VERBOSE_INIT_ARM 826 printf("init subsystems: stacks "); 827 console_flush(); 828 #endif 829 830 set_stackptr(PSR_IRQ32_MODE, 831 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 832 set_stackptr(PSR_ABT32_MODE, 833 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 834 set_stackptr(PSR_UND32_MODE, 835 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 836 #ifdef PMAP_DEBUG 837 if (pmap_debug_level >= 0) 838 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 839 kernelstack.pv_pa); 840 #endif /* PMAP_DEBUG */ 841 842 /* 843 * Well we should set a data abort handler. 844 * Once things get going this will change as we will need a proper 845 * handler. Until then we will use a handler that just panics but 846 * tells us why. 847 * Initialisation of the vectors will just panic on a data abort. 848 * This just fills in a slightly better one. 849 */ 850 #ifdef VERBOSE_INIT_ARM 851 printf("vectors "); 852 #endif 853 data_abort_handler_address = (u_int)data_abort_handler; 854 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 855 undefined_handler_address = (u_int)undefinedinstruction_bounce; 856 console_flush(); 857 858 859 /* 860 * At last ! 861 * We now have the kernel in physical memory from the bottom upwards. 862 * Kernel page tables are physically above this. 863 * The kernel is mapped to 0xf0000000 864 * The kernel data PTs will handle the mapping of 865 * 0xf1000000-0xf5ffffff (80 Mb) 866 * 2Meg of VRAM is mapped to 0xf7000000 867 * The page tables are mapped to 0xefc00000 868 * The IOMD is mapped to 0xf6000000 869 * The VIDC is mapped to 0xf6100000 870 * The IOMD/VIDC could be pushed up higher but i havent got 871 * sufficient documentation to do so; the addresses are not 872 * parametized yet and hard to read... better fix this before; 873 * its pretty unforgiving. 874 */ 875 876 /* Initialise the undefined instruction handlers */ 877 #ifdef VERBOSE_INIT_ARM 878 printf("undefined "); 879 #endif 880 undefined_init(); 881 console_flush(); 882 883 /* Load memory into UVM. */ 884 #ifdef VERBOSE_INIT_ARM 885 printf("page "); 886 #endif 887 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 888 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 889 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 890 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 891 892 if (start < physical_freestart) 893 start = physical_freestart; 894 if (end > physical_freeend) 895 end = physical_freeend; 896 897 /* XXX Consider DMA range intersection checking. */ 898 899 uvm_page_physload(atop(start), atop(end), 900 atop(start), atop(end), VM_FREELIST_DEFAULT); 901 } 902 903 /* Boot strap pmap telling it where the kernel page table is */ 904 #ifdef VERBOSE_INIT_ARM 905 printf("pmap "); 906 #endif 907 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 908 KERNEL_VM_BASE + KERNEL_VM_SIZE); 909 console_flush(); 910 911 /* Setup the IRQ system */ 912 #ifdef VERBOSE_INIT_ARM 913 printf("irq "); 914 #endif 915 console_flush(); 916 irq_init(); 917 #ifdef VERBOSE_INIT_ARM 918 printf("done.\n\n"); 919 #endif 920 921 #if NVIDCVIDEO>0 922 consinit(); /* necessary ? */ 923 #endif 924 925 /* Talk to the user */ 926 printf("NetBSD/evbarm booting ... \n"); 927 928 /* Tell the user if his boot loader is too old */ 929 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 930 (bootconfig.version != BOOTCONFIG_VERSION)) { 931 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 932 delay(5000000); 933 } 934 935 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 936 printf("Kernel arg string (@%p) %s\n", 937 bootconfig.args, bootconfig.args); 938 printf("\nBoot configuration structure reports the following " 939 "memory\n"); 940 941 printf(" DRAM block 0a at %08x size %08x " 942 "DRAM block 0b at %08x size %08x\n\r", 943 bootconfig.dram[0].address, 944 bootconfig.dram[0].pages * bootconfig.pagesize, 945 bootconfig.dram[1].address, 946 bootconfig.dram[1].pages * bootconfig.pagesize); 947 printf(" DRAM block 1a at %08x size %08x " 948 "DRAM block 1b at %08x size %08x\n\r", 949 bootconfig.dram[2].address, 950 bootconfig.dram[2].pages * bootconfig.pagesize, 951 bootconfig.dram[3].address, 952 bootconfig.dram[3].pages * bootconfig.pagesize); 953 printf(" VRAM block 0 at %08x size %08x\n\r", 954 bootconfig.vram[0].address, 955 bootconfig.vram[0].pages * bootconfig.pagesize); 956 957 #if NKSYMS || defined(DDB) || defined(LKM) 958 ksyms_init(bootconfig.ksym_end - bootconfig.ksym_start, 959 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 960 #endif 961 962 963 #ifdef DDB 964 db_machine_init(); 965 if (boothowto & RB_KDB) 966 Debugger(); 967 #endif /* DDB */ 968 969 /* We return the new stack pointer address */ 970 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 971 } 972 973 974 static void 975 process_kernel_args(void) 976 { 977 char *args; 978 979 /* Ok now we will check the arguments for interesting parameters. */ 980 args = bootconfig.args; 981 boothowto = 0; 982 983 /* Only arguments itself are passed from the new bootloader */ 984 while (*args == ' ') 985 ++args; 986 987 boot_args = args; 988 parse_mi_bootargs(boot_args); 989 parse_rpc_bootargs(boot_args); 990 } 991 992 993 void 994 parse_rpc_bootargs(char *args) 995 { 996 int integer; 997 998 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 999 &integer)) { 1000 videodram_size = integer; 1001 /* Round to 4K page */ 1002 videodram_size *= 1024; 1003 videodram_size = round_page(videodram_size); 1004 if (videodram_size > 1024*1024) 1005 videodram_size = 1024*1024; 1006 } 1007 } 1008 /* End of machdep.c */ 1009
Indexes created Thu Oct 23 22:10:10 GMT 2025