eb7500atx_machdep.c revision 1.28
1 /* $NetBSD: eb7500atx_machdep.c,v 1.28 2014/10/25 10:58:12 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2000-2002 Reinoud Zandijk. 5 * Copyright (c) 1994-1998 Mark Brinicombe. 6 * Copyright (c) 1994 Brini. 7 * All rights reserved. 8 * 9 * This code is derived from software written for Brini by Mark Brinicombe 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Brini. 22 * 4. The name of the company nor the name of the author may be used to 23 * endorse or promote products derived from this software without specific 24 * prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * RiscBSD kernel project 39 * 40 * machdep.c 41 * 42 * Machine 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 1.28 2014/10/25 10:58:12 skrll Exp $"); 59 60 #include <sys/systm.h> 61 #include <sys/kernel.h> 62 #include <sys/reboot.h> 63 #include <sys/proc.h> 64 #include <sys/msgbuf.h> 65 #include <sys/exec.h> 66 #include <sys/exec_aout.h> 67 #include <sys/ksyms.h> 68 #include <sys/bus.h> 69 #include <sys/cpu.h> 70 #include <sys/intr.h> 71 #include <sys/device.h> 72 73 #include <dev/cons.h> 74 75 #include <dev/ic/pckbcvar.h> 76 77 #include <dev/i2c/i2cvar.h> 78 #include <dev/i2c/pcf8583var.h> 79 80 #include <machine/db_machdep.h> 81 #include <ddb/db_sym.h> 82 #include <ddb/db_extern.h> 83 84 #include <uvm/uvm.h> 85 86 #include <arm/locore.h> 87 #include <arm/undefined.h> 88 89 #include <machine/signal.h> 90 #include <machine/bootconfig.h> 91 #include <machine/io.h> 92 #include <arm/arm32/machdep.h> 93 #include <machine/rtc.h> 94 95 #include <arm/iomd/vidc.h> 96 #include <arm/iomd/iomdreg.h> 97 #include <arm/iomd/iomdvar.h> 98 #include <arm/iomd/vidcvideo.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 dependent as it varies depending 118 * on where the ROM appears when you turn the MMU off. 119 */ 120 121 #define VERBOSE_INIT_ARM 122 123 struct bootconfig bootconfig; /* Boot config storage */ 124 videomemory_t videomemory; /* Video memory descriptor */ 125 126 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 127 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 128 129 extern int *vidc_base; 130 extern uint32_t iomd_base; 131 extern struct bus_space iomd_bs_tag; 132 133 paddr_t physical_start; 134 paddr_t physical_freestart; 135 paddr_t physical_freeend; 136 paddr_t physical_end; 137 paddr_t dma_range_begin; 138 paddr_t dma_range_end; 139 140 u_int free_pages; 141 paddr_t memoryblock_end; 142 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 148 149 paddr_t msgbufphys; 150 151 #ifdef PMAP_DEBUG 152 extern int pmap_debug_level; 153 #endif /* PMAP_DEBUG */ 154 155 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 156 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 157 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 158 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 159 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 160 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 161 162 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 163 164 165 #ifdef CPU_SA110 166 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 167 static vaddr_t sa110_cc_base; 168 #endif /* CPU_SA110 */ 169 170 /* Prototypes */ 171 void physcon_display_base(u_int); 172 extern void consinit(void); 173 174 void data_abort_handler(trapframe_t *); 175 void prefetch_abort_handler(trapframe_t *); 176 void undefinedinstruction_bounce(trapframe_t *frame); 177 178 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 179 static void process_kernel_args(void); 180 181 extern void dump_spl_masks(void); 182 183 void rpc_sa110_cc_setup(void); 184 185 void parse_rpc_bootargs(char *args); 186 187 extern void dumpsys(void); 188 189 190 # define console_flush() /* empty */ 191 192 193 #define panic2(a) do { \ 194 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 195 consinit(); \ 196 panic a; \ 197 } while (/* CONSTCOND */ 0) 198 199 /* 200 * void cpu_reboot(int howto, char *bootstr) 201 * 202 * Reboots the system 203 * 204 * Deal with any syncing, unmounting, dumping and shutdown hooks, 205 * then reset the CPU. 206 */ 207 208 /* NOTE: These variables will be removed, well some of them */ 209 210 extern u_int current_mask; 211 212 void 213 cpu_reboot(int howto, char *bootstr) 214 { 215 216 #ifdef DIAGNOSTIC 217 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 218 219 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 220 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 221 irqmasks[IPL_VM]); 222 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 223 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 224 225 /* dump_spl_masks(); */ 226 #endif /* DIAGNOSTIC */ 227 228 /* 229 * If we are still cold then hit the air brakes 230 * and crash to earth fast 231 */ 232 if (cold) { 233 doshutdownhooks(); 234 pmf_system_shutdown(boothowto); 235 printf("Halted while still in the ICE age.\n"); 236 printf("The operating system has halted.\n"); 237 printf("Please press any key to reboot.\n\n"); 238 cngetc(); 239 printf("rebooting...\n"); 240 cpu_reset(); 241 /*NOTREACHED*/ 242 } 243 244 /* Disable console buffering */ 245 cnpollc(1); 246 247 /* 248 * If RB_NOSYNC was not specified sync the discs. 249 * Note: Unless cold is set to 1 here, syslogd will die during 250 * the unmount. It looks like syslogd is getting woken up 251 * only to find that it cannot page part of the binary in as 252 * the filesystem has been unmounted. 253 */ 254 if (!(howto & RB_NOSYNC)) 255 bootsync(); 256 257 /* Say NO to interrupts */ 258 splhigh(); 259 260 /* Do a dump if requested. */ 261 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 262 dumpsys(); 263 264 /* 265 * Auto reboot overload protection 266 * 267 * This code stops the kernel entering an endless loop of reboot 268 * - panic cycles. This will have the effect of stopping further 269 * reboots after it has rebooted 8 times after panics. A clean 270 * halt or reboot will reset the counter. 271 */ 272 273 /* Run any shutdown hooks */ 274 doshutdownhooks(); 275 276 pmf_system_shutdown(boothowto); 277 278 /* Make sure IRQ's are disabled */ 279 IRQdisable; 280 281 if (howto & RB_HALT) { 282 printf("The operating system has halted.\n"); 283 printf("Please press any key to reboot.\n\n"); 284 cngetc(); 285 } 286 287 printf("rebooting...\n"); 288 cpu_reset(); 289 /*NOTREACHED*/ 290 } 291 292 293 /* 294 * u_int initarm(BootConfig *bootconf) 295 * 296 * Initial entry point on startup. This gets called before main() is 297 * entered. 298 * It should be responsible for setting up everything that must be 299 * in place when main is called. 300 * This includes 301 * Taking a copy of the boot configuration structure. 302 * Initialising the physical console so characters can be printed. 303 * Setting up page tables for the kernel 304 * Relocating the kernel to the bottom of physical memory 305 */ 306 307 /* 308 * this part is completely rewritten for the new bootloader ... It features 309 * a flat memory map with a mapping comparable to the EBSA arm32 machine 310 * to boost the portability and likeness of the code 311 */ 312 313 /* 314 * Mapping table for core kernel memory. This memory is mapped at init 315 * time with section mappings. 316 * 317 * XXX One big assumption in the current architecture seems that the kernel is 318 * XXX supposed to be mapped into bootconfig.dram[0]. 319 */ 320 321 #define ONE_MB 0x100000 322 323 struct l1_sec_map { 324 vaddr_t va; 325 paddr_t pa; 326 vsize_t size; 327 vm_prot_t prot; 328 int cache; 329 } l1_sec_table[] = { 330 /* Map 1Mb section for VIDC20 */ 331 { VIDC_BASE, VIDC_HW_BASE, 332 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE }, 334 335 /* Map 1Mb section from IOMD */ 336 { IOMD_BASE, IOMD_HW_BASE, 337 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE }, 339 340 /* Map 1Mb of COMBO (and module space) */ 341 { IO_BASE, IO_HW_BASE, 342 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 343 PTE_NOCACHE }, 344 { 0, 0, 0, 0, 0 } 345 }; 346 347 348 static void 349 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 350 { 351 /* check for bootconfig v2+ structure */ 352 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 353 /* v2+ cleaned up structure found */ 354 *bootconf = *raw_bootconf; 355 return; 356 } else { 357 panic2(("Internal error: no valid bootconfig block found")); 358 } 359 } 360 361 362 u_int 363 initarm(void *cookie) 364 { 365 struct bootconfig *raw_bootconf = cookie; 366 int loop; 367 int loop1; 368 u_int logical; 369 u_int kerneldatasize; 370 u_int l1pagetable; 371 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 372 373 /* 374 * Heads up ... Setup the CPU / MMU / TLB functions 375 */ 376 set_cpufuncs(); 377 378 /* canonicalise the boot configuration structure to alow versioning */ 379 canonicalise_bootconfig(&bootconfig, raw_bootconf); 380 booted_kernel = bootconfig.kernelname; 381 382 /* if the wscons interface is used, switch off VERBOSE booting :( */ 383 #if NVIDCVIDEO>0 384 # undef VERBOSE_INIT_ARM 385 # undef PMAP_DEBUG 386 #endif 387 388 /* 389 * Initialise the video memory descriptor 390 * 391 * Note: all references to the video memory virtual/physical address 392 * should go via this structure. 393 */ 394 395 /* Hardwire it on the place the bootloader tells us */ 396 videomemory.vidm_vbase = bootconfig.display_start; 397 videomemory.vidm_pbase = bootconfig.display_phys; 398 videomemory.vidm_size = bootconfig.display_size; 399 if (bootconfig.vram[0].pages) 400 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 401 else 402 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 403 vidc_base = (int *) VIDC_HW_BASE; 404 iomd_base = IOMD_HW_BASE; 405 406 /* 407 * Initialise the physical console 408 * This is done in main() but for the moment we do it here so that 409 * we can use printf in initarm() before main() has been called. 410 * only for `vidcconsole!' ... not wscons 411 */ 412 #if NVIDCVIDEO == 0 413 consinit(); 414 #endif 415 416 /* 417 * Initialise the diagnostic serial console 418 * This allows a means of generating output during initarm(). 419 * Once all the memory map changes are complete we can call consinit() 420 * and not have to worry about things moving. 421 */ 422 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 423 /* XXX snif .... i am still not able to this */ 424 425 /* 426 * We have the following memory map (derived from EBSA) 427 * 428 * virtual address == physical address apart from the areas: 429 * 0x00000000 -> 0x000fffff which is mapped to 430 * top 1MB of physical memory 431 * 0xf0000000 -> 0xf0ffffff wich is mapped to 432 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 433 * 434 * This means that the kernel is mapped suitably for continuing 435 * execution, all I/O is mapped 1:1 virtual to physical and 436 * physical memory is accessible. 437 * 438 * The initarm() has the responsibility for creating the kernel 439 * page tables. 440 * It must also set up various memory pointers that are used 441 * by pmap etc. 442 */ 443 444 /* START OF REAL NEW STUFF */ 445 446 /* Check to make sure the page size is correct */ 447 if (PAGE_SIZE != bootconfig.pagesize) 448 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 449 bootconfig.pagesize, PAGE_SIZE)); 450 451 /* process arguments */ 452 process_kernel_args(); 453 454 455 /* 456 * Now set up the page tables for the kernel ... this part is copied 457 * in a (modified?) way from the EBSA machine port.... 458 */ 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("Allocating page tables\n"); 462 #endif 463 /* 464 * Set up the variables that define the availablilty of physical 465 * memory 466 */ 467 physical_start = 0xffffffff; 468 physical_end = 0; 469 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 470 if (bootconfig.dram[loop].address < physical_start) 471 physical_start = bootconfig.dram[loop].address; 472 memoryblock_end = bootconfig.dram[loop].address + 473 bootconfig.dram[loop].pages * PAGE_SIZE; 474 if (memoryblock_end > physical_end) 475 physical_end = memoryblock_end; 476 physmem += bootconfig.dram[loop].pages; 477 }; 478 /* constants for now, but might be changed/configured */ 479 dma_range_begin = (paddr_t) physical_start; 480 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 481 /* XXX HACK HACK XXX */ 482 /* dma_range_end = 0x18000000; */ 483 484 if (physical_start != bootconfig.dram[0].address) { 485 int oldblocks = 0; 486 487 /* 488 * must be a kinetic, as it's the only thing to shuffle memory 489 * around 490 */ 491 /* hack hack - throw away the slow dram */ 492 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 493 if (bootconfig.dram[loop].address < 494 bootconfig.dram[0].address) { 495 /* non kinetic ram */ 496 bootconfig.dram[loop].address = 0; 497 physmem -= bootconfig.dram[loop].pages; 498 bootconfig.drampages -= 499 bootconfig.dram[loop].pages; 500 bootconfig.dram[loop].pages = 0; 501 oldblocks++; 502 } 503 } 504 physical_start = bootconfig.dram[0].address; 505 bootconfig.dramblocks -= oldblocks; 506 } 507 508 physical_freestart = physical_start; 509 free_pages = bootconfig.drampages; 510 physical_freeend = physical_end; 511 512 513 /* 514 * AHUM !! set this variable ... it was set up in the old 1st 515 * stage bootloader 516 */ 517 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 518 519 /* Update the address of the first free page of physical memory */ 520 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 521 physical_freestart += 522 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 523 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 524 525 /* Define a macro to simplify memory allocation */ 526 #define valloc_pages(var, np) \ 527 alloc_pages((var).pv_pa, (np)); \ 528 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 529 530 #define alloc_pages(var, np) \ 531 (var) = physical_freestart; \ 532 physical_freestart += ((np) * PAGE_SIZE); \ 533 free_pages -= (np); \ 534 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 535 536 loop1 = 0; 537 kernel_l1pt.pv_pa = 0; 538 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 539 /* Are we 16KB aligned for an L1 ? */ 540 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 541 && kernel_l1pt.pv_pa == 0) { 542 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 543 } else { 544 valloc_pages(kernel_pt_table[loop1], 545 L2_TABLE_SIZE / PAGE_SIZE); 546 ++loop1; 547 } 548 } 549 550 551 #ifdef DIAGNOSTIC 552 /* This should never be able to happen but better confirm that. */ 553 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 554 panic2(("initarm: Failed to align the kernel page " 555 "directory\n")); 556 #endif 557 558 /* 559 * Allocate a page for the system page mapped to V0x00000000 560 * This page will just contain the system vectors and can be 561 * shared by all processes. 562 */ 563 alloc_pages(systempage.pv_pa, 1); 564 565 /* Allocate stacks for all modes */ 566 valloc_pages(irqstack, IRQ_STACK_SIZE); 567 valloc_pages(abtstack, ABT_STACK_SIZE); 568 valloc_pages(undstack, UND_STACK_SIZE); 569 valloc_pages(kernelstack, UPAGES); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("Setting up stacks :\n"); 573 printf("IRQ stack: p0x%08lx v0x%08lx\n", 574 irqstack.pv_pa, irqstack.pv_va); 575 printf("ABT stack: p0x%08lx v0x%08lx\n", 576 abtstack.pv_pa, abtstack.pv_va); 577 printf("UND stack: p0x%08lx v0x%08lx\n", 578 undstack.pv_pa, undstack.pv_va); 579 printf("SVC stack: p0x%08lx v0x%08lx\n", 580 kernelstack.pv_pa, kernelstack.pv_va); 581 printf("\n"); 582 #endif 583 584 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 585 586 #ifdef CPU_SA110 587 /* 588 * XXX totally stuffed hack to work round problems introduced 589 * in recent versions of the pmap code. Due to the calls used there 590 * we cannot allocate virtual memory during bootstrap. 591 */ 592 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 593 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 594 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 595 #endif /* CPU_SA110 */ 596 597 /* 598 * Ok we have allocated physical pages for the primary kernel 599 * page tables 600 */ 601 602 #ifdef VERBOSE_INIT_ARM 603 printf("Creating L1 page table\n"); 604 #endif 605 606 /* 607 * Now we start construction of the L1 page table 608 * We start by mapping the L2 page tables into the L1. 609 * This means that we can replace L1 mappings later on if necessary 610 */ 611 l1pagetable = kernel_l1pt.pv_pa; 612 613 /* Map the L2 pages tables in the L1 page table */ 614 pmap_link_l2pt(l1pagetable, 0x00000000, 615 &kernel_pt_table[KERNEL_PT_SYS]); 616 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 617 &kernel_pt_table[KERNEL_PT_KERNEL]); 618 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 619 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 620 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 621 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 622 &kernel_pt_table[KERNEL_PT_VMEM]); 623 624 /* update the top of the kernel VM */ 625 pmap_curmaxkvaddr = 626 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 627 628 #ifdef VERBOSE_INIT_ARM 629 printf("Mapping kernel\n"); 630 #endif 631 632 /* Now we fill in the L2 pagetable for the kernel code/data */ 633 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 634 /* 635 * The defines are a workaround for a recent problem that occurred 636 * with ARM 610 processors and some ARM 710 processors 637 * Other ARM 710 and StrongARM processors don't have a problem. 638 */ 639 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 640 #if defined(CPU_ARM6) || defined(CPU_ARM7) 641 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 642 physical_start, kernexec->a_text, 643 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 644 #else /* CPU_ARM6 || CPU_ARM7 */ 645 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 646 physical_start, kernexec->a_text, 647 VM_PROT_READ, PTE_CACHE); 648 #endif /* CPU_ARM6 || CPU_ARM7 */ 649 logical += pmap_map_chunk(l1pagetable, 650 KERNEL_TEXT_BASE + logical, physical_start + logical, 651 kerneldatasize - kernexec->a_text, 652 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 653 } else { /* !ZMAGIC */ 654 /* 655 * Most likely an ELF kernel ... 656 * XXX no distinction yet between read only and 657 * read/write area's ... 658 */ 659 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 660 physical_start, kerneldatasize, 661 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 662 }; 663 664 665 #ifdef VERBOSE_INIT_ARM 666 printf("Constructing L2 page tables\n"); 667 #endif 668 669 /* Map the stack pages */ 670 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 671 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 672 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 673 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 674 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 675 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 677 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 679 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 680 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 681 682 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 683 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 684 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 685 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 686 } 687 688 /* Now we fill in the L2 pagetable for the VRAM */ 689 /* 690 * Current architectures mean that the VRAM is always in 1 691 * continuous bank. This means that we can just map the 2 meg 692 * that the VRAM would occupy. In theory we don't need a page 693 * table for VRAM, we could section map it but we would need 694 * the page tables if DRAM was in use. 695 * XXX please map two adjacent virtual areas to ONE physical 696 * area 697 */ 698 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 699 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 700 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 701 videomemory.vidm_pbase, videomemory.vidm_size, 702 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 703 704 /* Map the vector page. */ 705 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 706 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 707 708 /* Map the core memory needed before autoconfig */ 709 loop = 0; 710 while (l1_sec_table[loop].size) { 711 vsize_t sz; 712 713 #ifdef VERBOSE_INIT_ARM 714 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 715 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 716 l1_sec_table[loop].va); 717 #endif 718 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 719 pmap_map_section(l1pagetable, 720 l1_sec_table[loop].va + sz, 721 l1_sec_table[loop].pa + sz, 722 l1_sec_table[loop].prot, 723 l1_sec_table[loop].cache); 724 ++loop; 725 } 726 727 /* 728 * Now we have the real page tables in place so we can switch 729 * to them. Once this is done we will be running with the 730 * REAL kernel page tables. 731 */ 732 733 #ifdef VERBOSE_INIT_ARM 734 printf("switching domains\n"); 735 #endif 736 /* be a client to all domains */ 737 cpu_domains(0x55555555); 738 739 /* Switch tables */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("switching to new L1 page table\n"); 742 #endif 743 cpu_setttb(kernel_l1pt.pv_pa, true); 744 745 /* 746 * We must now clean the cache again.... 747 * Cleaning may be done by reading new data to displace any 748 * dirty data in the cache. This will have happened in cpu_setttb() 749 * but since we are boot strapping the addresses used for the read 750 * may have just been remapped and thus the cache could be out 751 * of sync. A re-clean after the switch will cure this. 752 * After booting there are no gross reloations of the kernel thus 753 * this problem will not occur after initarm(). 754 */ 755 cpu_idcache_wbinv_all(); 756 cpu_tlb_flushID(); 757 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 758 759 /* 760 * Moved from cpu_startup() as data_abort_handler() references 761 * this during uvm init 762 */ 763 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 764 765 /* 766 * if there is support for a serial console ...we should now 767 * reattach it 768 */ 769 /* fcomcndetach();*/ 770 771 /* 772 * Reflect videomemory relocation in the videomemory structure 773 * and reinit console 774 */ 775 if (bootconfig.vram[0].pages == 0) { 776 videomemory.vidm_vbase = VMEM_VBASE; 777 } else { 778 videomemory.vidm_vbase = VMEM_VBASE; 779 bootconfig.display_start = VMEM_VBASE; 780 }; 781 vidc_base = (int *) VIDC_BASE; 782 iomd_base = IOMD_BASE; 783 784 #ifdef VERBOSE_INIT_ARM 785 printf("running on the new L1 page table!\n"); 786 printf("done.\n"); 787 #endif 788 789 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 790 791 #ifdef VERBOSE_INIT_ARM 792 printf("\n"); 793 #endif 794 795 /* 796 * Pages were allocated during the secondary bootstrap for the 797 * stacks for different CPU modes. 798 * We must now set the r13 registers in the different CPU modes to 799 * point to these stacks. 800 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 801 * of the stack memory. 802 */ 803 #ifdef VERBOSE_INIT_ARM 804 printf("init subsystems: stacks "); 805 console_flush(); 806 #endif 807 808 set_stackptr(PSR_IRQ32_MODE, 809 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 810 set_stackptr(PSR_ABT32_MODE, 811 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 812 set_stackptr(PSR_UND32_MODE, 813 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 814 #ifdef PMAP_DEBUG 815 if (pmap_debug_level >= 0) 816 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 817 kernelstack.pv_pa); 818 #endif /* PMAP_DEBUG */ 819 820 /* 821 * Well we should set a data abort handler. 822 * Once things get going this will change as we will need a proper 823 * handler. Until then we will use a handler that just panics but 824 * tells us why. 825 * Initialisation of the vectors will just panic on a data abort. 826 * This just fills in a slightly better one. 827 */ 828 #ifdef VERBOSE_INIT_ARM 829 printf("vectors "); 830 #endif 831 data_abort_handler_address = (u_int)data_abort_handler; 832 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 833 undefined_handler_address = (u_int)undefinedinstruction_bounce; 834 console_flush(); 835 836 837 /* 838 * At last ! 839 * We now have the kernel in physical memory from the bottom upwards. 840 * Kernel page tables are physically above this. 841 * The kernel is mapped to 0xf0000000 842 * The kernel data PTs will handle the mapping of 843 * 0xf1000000-0xf5ffffff (80 Mb) 844 * 2Meg of VRAM is mapped to 0xf7000000 845 * The page tables are mapped to 0xefc00000 846 * The IOMD is mapped to 0xf6000000 847 * The VIDC is mapped to 0xf6100000 848 * The IOMD/VIDC could be pushed up higher but i havent got 849 * sufficient documentation to do so; the addresses are not 850 * parametized yet and hard to read... better fix this before; 851 * its pretty unforgiving. 852 */ 853 854 /* Initialise the undefined instruction handlers */ 855 #ifdef VERBOSE_INIT_ARM 856 printf("undefined "); 857 #endif 858 undefined_init(); 859 console_flush(); 860 861 /* Load memory into UVM. */ 862 #ifdef VERBOSE_INIT_ARM 863 printf("page "); 864 #endif 865 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 866 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 867 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 868 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 869 870 if (start < physical_freestart) 871 start = physical_freestart; 872 if (end > physical_freeend) 873 end = physical_freeend; 874 875 /* XXX Consider DMA range intersection checking. */ 876 877 uvm_page_physload(atop(start), atop(end), 878 atop(start), atop(end), VM_FREELIST_DEFAULT); 879 } 880 881 /* Boot strap pmap telling it where the kernel page table is */ 882 #ifdef VERBOSE_INIT_ARM 883 printf("pmap "); 884 #endif 885 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 886 console_flush(); 887 888 /* Setup the IRQ system */ 889 #ifdef VERBOSE_INIT_ARM 890 printf("irq "); 891 #endif 892 console_flush(); 893 irq_init(); 894 #ifdef VERBOSE_INIT_ARM 895 printf("done.\n\n"); 896 #endif 897 898 #if NVIDCVIDEO>0 899 consinit(); /* necessary ? */ 900 #endif 901 902 /* Talk to the user */ 903 printf("NetBSD/evbarm booting ... \n"); 904 905 /* Tell the user if his boot loader is too old */ 906 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 907 (bootconfig.version != BOOTCONFIG_VERSION)) { 908 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 909 delay(5000000); 910 } 911 912 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 913 printf("Kernel arg string (@%p) %s\n", 914 bootconfig.args, bootconfig.args); 915 printf("\nBoot configuration structure reports the following " 916 "memory\n"); 917 918 printf(" DRAM block 0a at %08x size %08x " 919 "DRAM block 0b at %08x size %08x\n\r", 920 bootconfig.dram[0].address, 921 bootconfig.dram[0].pages * bootconfig.pagesize, 922 bootconfig.dram[1].address, 923 bootconfig.dram[1].pages * bootconfig.pagesize); 924 printf(" DRAM block 1a at %08x size %08x " 925 "DRAM block 1b at %08x size %08x\n\r", 926 bootconfig.dram[2].address, 927 bootconfig.dram[2].pages * bootconfig.pagesize, 928 bootconfig.dram[3].address, 929 bootconfig.dram[3].pages * bootconfig.pagesize); 930 printf(" VRAM block 0 at %08x size %08x\n\r", 931 bootconfig.vram[0].address, 932 bootconfig.vram[0].pages * bootconfig.pagesize); 933 934 #if NKSYMS || defined(DDB) || defined(MODULAR) 935 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 936 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 937 #endif 938 939 940 #ifdef DDB 941 db_machine_init(); 942 if (boothowto & RB_KDB) 943 Debugger(); 944 #endif /* DDB */ 945 946 /* We return the new stack pointer address */ 947 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 948 } 949 950 951 static void 952 process_kernel_args(void) 953 { 954 char *args; 955 956 /* Ok now we will check the arguments for interesting parameters. */ 957 args = bootconfig.args; 958 boothowto = 0; 959 960 /* Only arguments itself are passed from the new bootloader */ 961 while (*args == ' ') 962 ++args; 963 964 boot_args = args; 965 parse_mi_bootargs(boot_args); 966 parse_rpc_bootargs(boot_args); 967 } 968 969 970 void 971 parse_rpc_bootargs(char *args) 972 { 973 int integer; 974 975 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 976 &integer)) { 977 videodram_size = integer; 978 /* Round to 4K page */ 979 videodram_size *= 1024; 980 videodram_size = round_page(videodram_size); 981 if (videodram_size > 1024*1024) 982 videodram_size = 1024*1024; 983 } 984 } 985 /* End of machdep.c */ 986
Indexes created Wed Oct 22 13:09:56 GMT 2025