1 /* $NetBSD: eb7500atx_machdep.c,v 1.37 2022/05/15 20:37:51 andvar 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 "vidcvideo.h" 53 #include "pckbc.h" 54 55 #include <sys/param.h> 56 57 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.37 2022/05/15 20:37:51 andvar 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/exec_aout.h> 66 #include <sys/ksyms.h> 67 #include <sys/bus.h> 68 #include <sys/cpu.h> 69 #include <sys/intr.h> 70 #include <sys/device.h> 71 72 #include <dev/cons.h> 73 74 #include <dev/ic/pckbcvar.h> 75 76 #include <dev/i2c/i2cvar.h> 77 #include <dev/i2c/pcf8583var.h> 78 79 #include <machine/db_machdep.h> 80 #include <ddb/db_sym.h> 81 #include <ddb/db_extern.h> 82 83 #include <uvm/uvm.h> 84 85 #include <arm/locore.h> 86 #include <arm/undefined.h> 87 88 #include <machine/signal.h> 89 #include <machine/bootconfig.h> 90 #include <machine/io.h> 91 #include <arm/arm32/machdep.h> 92 #include <machine/rtc.h> 93 94 #include <arm/iomd/vidc.h> 95 #include <arm/iomd/iomdreg.h> 96 #include <arm/iomd/iomdvar.h> 97 #include <arm/iomd/vidcvideo.h> 98 #include <arm/iomd/iomdiicvar.h> 99 100 /* static i2c_tag_t acorn32_i2c_tag;*/ 101 102 #include "ksyms.h" 103 104 /* Kernel text starts at the base of the kernel address space. */ 105 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000) 106 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 107 108 /* 109 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space 110 * Fixed mappings exist from 0xf6000000 - 0xffffffff 111 */ 112 #define KERNEL_VM_SIZE 0x05000000 113 114 /* 115 * Address to call from cpu_reset() to reset the machine. 116 * This is machine architecture dependent as it varies depending 117 * on where the ROM appears when you turn the MMU off. 118 */ 119 120 #define VERBOSE_INIT_ARM 121 122 struct bootconfig bootconfig; /* Boot config storage */ 123 videomemory_t videomemory; /* Video memory descriptor */ 124 125 char *boot_args = NULL; /* holds the pre-processed boot arguments */ 126 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */ 127 128 extern int *vidc_base; 129 extern uint32_t iomd_base; 130 extern struct bus_space iomd_bs_tag; 131 132 paddr_t physical_start; 133 paddr_t physical_freestart; 134 paddr_t physical_freeend; 135 paddr_t physical_end; 136 paddr_t dma_range_begin; 137 paddr_t dma_range_end; 138 139 u_int free_pages; 140 paddr_t memoryblock_end; 141 142 #ifndef PMAP_STATIC_L1S 143 int max_processes = 64; /* Default number */ 144 #endif /* !PMAP_STATIC_L1S */ 145 146 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */ 147 148 paddr_t msgbufphys; 149 150 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 151 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 152 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 153 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */ 154 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 155 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 156 157 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 158 159 160 #ifdef CPU_SA110 161 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 162 static vaddr_t sa110_cc_base; 163 #endif /* CPU_SA110 */ 164 165 /* Prototypes */ 166 void physcon_display_base(u_int); 167 extern void consinit(void); 168 169 void data_abort_handler(trapframe_t *); 170 void prefetch_abort_handler(trapframe_t *); 171 void undefinedinstruction_bounce(trapframe_t *frame); 172 173 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *); 174 static void process_kernel_args(void); 175 176 extern void dump_spl_masks(void); 177 178 void rpc_sa110_cc_setup(void); 179 180 void parse_rpc_bootargs(char *args); 181 182 extern void dumpsys(void); 183 184 185 # define console_flush() /* empty */ 186 187 188 #define panic2(a) do { \ 189 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \ 190 consinit(); \ 191 panic a; \ 192 } while (/* CONSTCOND */ 0) 193 194 /* 195 * void cpu_reboot(int howto, char *bootstr) 196 * 197 * Reboots the system 198 * 199 * Deal with any syncing, unmounting, dumping and shutdown hooks, 200 * then reset the CPU. 201 */ 202 203 /* NOTE: These variables will be removed, well some of them */ 204 205 extern u_int current_mask; 206 207 void 208 cpu_reboot(int howto, char *bootstr) 209 { 210 211 #ifdef DIAGNOSTIC 212 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp); 213 214 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n", 215 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY], 216 irqmasks[IPL_VM]); 217 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n", 218 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]); 219 220 /* dump_spl_masks(); */ 221 #endif /* DIAGNOSTIC */ 222 223 /* 224 * If we are still cold then hit the air brakes 225 * and crash to earth fast 226 */ 227 if (cold) { 228 doshutdownhooks(); 229 pmf_system_shutdown(boothowto); 230 printf("Halted while still in the ICE age.\n"); 231 printf("The operating system has halted.\n"); 232 printf("Please press any key to reboot.\n\n"); 233 cngetc(); 234 printf("rebooting...\n"); 235 cpu_reset(); 236 /*NOTREACHED*/ 237 } 238 239 /* Disable console buffering */ 240 cnpollc(1); 241 242 /* 243 * If RB_NOSYNC was not specified sync the discs. 244 * Note: Unless cold is set to 1 here, syslogd will die during 245 * the unmount. It looks like syslogd is getting woken up 246 * only to find that it cannot page part of the binary in as 247 * the filesystem has been unmounted. 248 */ 249 if (!(howto & RB_NOSYNC)) 250 bootsync(); 251 252 /* Say NO to interrupts */ 253 splhigh(); 254 255 /* Do a dump if requested. */ 256 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 257 dumpsys(); 258 259 /* 260 * Auto reboot overload protection 261 * 262 * This code stops the kernel entering an endless loop of reboot 263 * - panic cycles. This will have the effect of stopping further 264 * reboots after it has rebooted 8 times after panics. A clean 265 * halt or reboot will reset the counter. 266 */ 267 268 /* Run any shutdown hooks */ 269 doshutdownhooks(); 270 271 pmf_system_shutdown(boothowto); 272 273 /* Make sure IRQ's are disabled */ 274 IRQdisable; 275 276 if (howto & RB_HALT) { 277 printf("The operating system has halted.\n"); 278 printf("Please press any key to reboot.\n\n"); 279 cngetc(); 280 } 281 282 printf("rebooting...\n"); 283 cpu_reset(); 284 /*NOTREACHED*/ 285 } 286 287 288 /* 289 * u_int initarm(BootConfig *bootconf) 290 * 291 * Initial entry point on startup. This gets called before main() is 292 * entered. 293 * It should be responsible for setting up everything that must be 294 * in place when main is called. 295 * This includes 296 * Taking a copy of the boot configuration structure. 297 * Initialising the physical console so characters can be printed. 298 * Setting up page tables for the kernel 299 * Relocating the kernel to the bottom of physical memory 300 */ 301 302 /* 303 * this part is completely rewritten for the new bootloader ... It features 304 * a flat memory map with a mapping comparable to the EBSA arm32 machine 305 * to boost the portability and likeness of the code 306 */ 307 308 /* 309 * Mapping table for core kernel memory. This memory is mapped at init 310 * time with section mappings. 311 * 312 * XXX One big assumption in the current architecture seems that the kernel is 313 * XXX supposed to be mapped into bootconfig.dram[0]. 314 */ 315 316 #define ONE_MB 0x100000 317 318 struct l1_sec_map { 319 vaddr_t va; 320 paddr_t pa; 321 vsize_t size; 322 vm_prot_t prot; 323 int cache; 324 } l1_sec_table[] = { 325 /* Map 1Mb section for VIDC20 */ 326 { VIDC_BASE, VIDC_HW_BASE, 327 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 328 PTE_NOCACHE }, 329 330 /* Map 1Mb section from IOMD */ 331 { IOMD_BASE, IOMD_HW_BASE, 332 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE }, 334 335 /* Map 1Mb of COMBO (and module space) */ 336 { IO_BASE, IO_HW_BASE, 337 ONE_MB, VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE }, 339 { 0, 0, 0, 0, 0 } 340 }; 341 342 343 static void 344 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf) 345 { 346 /* check for bootconfig v2+ structure */ 347 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) { 348 /* v2+ cleaned up structure found */ 349 *bootconf = *raw_bootconf; 350 return; 351 } else { 352 panic2(("Internal error: no valid bootconfig block found")); 353 } 354 } 355 356 357 vaddr_t 358 initarm(void *cookie) 359 { 360 struct bootconfig *raw_bootconf = cookie; 361 int loop; 362 int loop1; 363 u_int logical; 364 u_int kerneldatasize; 365 u_int l1pagetable; 366 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 367 368 /* 369 * Heads up ... Setup the CPU / MMU / TLB functions 370 */ 371 set_cpufuncs(); 372 373 /* canonicalise the boot configuration structure to allow versioning */ 374 canonicalise_bootconfig(&bootconfig, raw_bootconf); 375 booted_kernel = bootconfig.kernelname; 376 377 /* if the wscons interface is used, switch off VERBOSE booting :( */ 378 #if NVIDCVIDEO>0 379 # undef VERBOSE_INIT_ARM 380 #endif 381 382 /* 383 * Initialise the video memory descriptor 384 * 385 * Note: all references to the video memory virtual/physical address 386 * should go via this structure. 387 */ 388 389 /* Hardwire it on the place the bootloader tells us */ 390 videomemory.vidm_vbase = bootconfig.display_start; 391 videomemory.vidm_pbase = bootconfig.display_phys; 392 videomemory.vidm_size = bootconfig.display_size; 393 if (bootconfig.vram[0].pages) 394 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM; 395 else 396 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM; 397 vidc_base = (int *) VIDC_HW_BASE; 398 iomd_base = IOMD_HW_BASE; 399 400 /* 401 * Initialise the physical console 402 * This is done in main() but for the moment we do it here so that 403 * we can use printf in initarm() before main() has been called. 404 * only for `vidcconsole!' ... not wscons 405 */ 406 #if NVIDCVIDEO == 0 407 consinit(); 408 #endif 409 410 /* 411 * Initialise the diagnostic serial console 412 * This allows a means of generating output during initarm(). 413 * Once all the memory map changes are complete we can call consinit() 414 * and not have to worry about things moving. 415 */ 416 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */ 417 /* XXX snif .... i am still not able to this */ 418 419 /* 420 * We have the following memory map (derived from EBSA) 421 * 422 * virtual address == physical address apart from the areas: 423 * 0x00000000 -> 0x000fffff which is mapped to 424 * top 1MB of physical memory 425 * 0xf0000000 -> 0xf0ffffff which is mapped to 426 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0]) 427 * 428 * This means that the kernel is mapped suitably for continuing 429 * execution, all I/O is mapped 1:1 virtual to physical and 430 * physical memory is accessible. 431 * 432 * The initarm() has the responsibility for creating the kernel 433 * page tables. 434 * It must also set up various memory pointers that are used 435 * by pmap etc. 436 */ 437 438 /* START OF REAL NEW STUFF */ 439 440 /* Check to make sure the page size is correct */ 441 if (PAGE_SIZE != bootconfig.pagesize) 442 panic2(("Page size is %d bytes instead of %d !! (huh?)\n", 443 bootconfig.pagesize, PAGE_SIZE)); 444 445 /* process arguments */ 446 process_kernel_args(); 447 448 449 /* 450 * Now set up the page tables for the kernel ... this part is copied 451 * in a (modified?) way from the EBSA machine port.... 452 */ 453 454 #ifdef VERBOSE_INIT_ARM 455 printf("Allocating page tables\n"); 456 #endif 457 /* 458 * Set up the variables that define the availability of physical 459 * memory 460 */ 461 physical_start = 0xffffffff; 462 physical_end = 0; 463 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) { 464 if (bootconfig.dram[loop].address < physical_start) 465 physical_start = bootconfig.dram[loop].address; 466 memoryblock_end = bootconfig.dram[loop].address + 467 bootconfig.dram[loop].pages * PAGE_SIZE; 468 if (memoryblock_end > physical_end) 469 physical_end = memoryblock_end; 470 physmem += bootconfig.dram[loop].pages; 471 }; 472 /* constants for now, but might be changed/configured */ 473 dma_range_begin = (paddr_t) physical_start; 474 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024); 475 /* XXX HACK HACK XXX */ 476 /* dma_range_end = 0x18000000; */ 477 478 if (physical_start != bootconfig.dram[0].address) { 479 int oldblocks = 0; 480 481 /* 482 * must be a kinetic, as it's the only thing to shuffle memory 483 * around 484 */ 485 /* hack hack - throw away the slow dram */ 486 for (loop = 0; loop < bootconfig.dramblocks; ++loop) { 487 if (bootconfig.dram[loop].address < 488 bootconfig.dram[0].address) { 489 /* non kinetic ram */ 490 bootconfig.dram[loop].address = 0; 491 physmem -= bootconfig.dram[loop].pages; 492 bootconfig.drampages -= 493 bootconfig.dram[loop].pages; 494 bootconfig.dram[loop].pages = 0; 495 oldblocks++; 496 } 497 } 498 physical_start = bootconfig.dram[0].address; 499 bootconfig.dramblocks -= oldblocks; 500 } 501 502 physical_freestart = physical_start; 503 free_pages = bootconfig.drampages; 504 physical_freeend = physical_end; 505 506 507 /* 508 * AHUM !! set this variable ... it was set up in the old 1st 509 * stage bootloader 510 */ 511 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize; 512 513 /* Update the address of the first free page of physical memory */ 514 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */ 515 physical_freestart += 516 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize; 517 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE; 518 519 /* Define a macro to simplify memory allocation */ 520 #define valloc_pages(var, np) \ 521 alloc_pages((var).pv_pa, (np)); \ 522 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 523 524 #define alloc_pages(var, np) \ 525 (var) = physical_freestart; \ 526 physical_freestart += ((np) * PAGE_SIZE); \ 527 free_pages -= (np); \ 528 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 529 530 loop1 = 0; 531 kernel_l1pt.pv_pa = 0; 532 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 533 /* Are we 16KB aligned for an L1 ? */ 534 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 535 && kernel_l1pt.pv_pa == 0) { 536 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 537 } else { 538 valloc_pages(kernel_pt_table[loop1], 539 L2_TABLE_SIZE / PAGE_SIZE); 540 ++loop1; 541 } 542 } 543 544 545 #ifdef DIAGNOSTIC 546 /* This should never be able to happen but better confirm that. */ 547 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 548 panic2(("initarm: Failed to align the kernel page " 549 "directory\n")); 550 #endif 551 552 /* 553 * Allocate a page for the system page mapped to V0x00000000 554 * This page will just contain the system vectors and can be 555 * shared by all processes. 556 */ 557 alloc_pages(systempage.pv_pa, 1); 558 559 /* Allocate stacks for all modes */ 560 valloc_pages(irqstack, IRQ_STACK_SIZE); 561 valloc_pages(abtstack, ABT_STACK_SIZE); 562 valloc_pages(undstack, UND_STACK_SIZE); 563 valloc_pages(kernelstack, UPAGES); 564 565 #ifdef VERBOSE_INIT_ARM 566 printf("Setting up stacks :\n"); 567 printf("IRQ stack: p0x%08lx v0x%08lx\n", 568 irqstack.pv_pa, irqstack.pv_va); 569 printf("ABT stack: p0x%08lx v0x%08lx\n", 570 abtstack.pv_pa, abtstack.pv_va); 571 printf("UND stack: p0x%08lx v0x%08lx\n", 572 undstack.pv_pa, undstack.pv_va); 573 printf("SVC stack: p0x%08lx v0x%08lx\n", 574 kernelstack.pv_pa, kernelstack.pv_va); 575 printf("\n"); 576 #endif 577 578 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 579 580 #ifdef CPU_SA110 581 /* 582 * XXX totally stuffed hack to work round problems introduced 583 * in recent versions of the pmap code. Due to the calls used there 584 * we cannot allocate virtual memory during bootstrap. 585 */ 586 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start) 587 + (CPU_SA110_CACHE_CLEAN_SIZE - 1)) 588 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1); 589 #endif /* CPU_SA110 */ 590 591 /* 592 * Ok we have allocated physical pages for the primary kernel 593 * page tables 594 */ 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("Creating L1 page table\n"); 598 #endif 599 600 /* 601 * Now we start construction of the L1 page table 602 * We start by mapping the L2 page tables into the L1. 603 * This means that we can replace L1 mappings later on if necessary 604 */ 605 l1pagetable = kernel_l1pt.pv_pa; 606 607 /* Map the L2 pages tables in the L1 page table */ 608 pmap_link_l2pt(l1pagetable, 0x00000000, 609 &kernel_pt_table[KERNEL_PT_SYS]); 610 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 611 &kernel_pt_table[KERNEL_PT_KERNEL]); 612 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 613 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 614 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 615 pmap_link_l2pt(l1pagetable, VMEM_VBASE, 616 &kernel_pt_table[KERNEL_PT_VMEM]); 617 618 /* update the top of the kernel VM */ 619 pmap_curmaxkvaddr = 620 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 621 622 #ifdef VERBOSE_INIT_ARM 623 printf("Mapping kernel\n"); 624 #endif 625 626 /* Now we fill in the L2 pagetable for the kernel code/data */ 627 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */ 628 /* 629 * The defines are a workaround for a recent problem that occurred 630 * with ARM 610 processors and some ARM 710 processors 631 * Other ARM 710 and StrongARM processors don't have a problem. 632 */ 633 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 634 #if defined(CPU_ARM6) || defined(CPU_ARM7) 635 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 636 physical_start, kernexec->a_text, 637 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 638 #else /* CPU_ARM6 || CPU_ARM7 */ 639 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 640 physical_start, kernexec->a_text, 641 VM_PROT_READ, PTE_CACHE); 642 #endif /* CPU_ARM6 || CPU_ARM7 */ 643 logical += pmap_map_chunk(l1pagetable, 644 KERNEL_TEXT_BASE + logical, physical_start + logical, 645 kerneldatasize - kernexec->a_text, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 647 } else { /* !ZMAGIC */ 648 /* 649 * Most likely an ELF kernel ... 650 * XXX no distinction yet between read only and 651 * read/write area's ... 652 */ 653 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 654 physical_start, kerneldatasize, 655 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 656 }; 657 658 659 #ifdef VERBOSE_INIT_ARM 660 printf("Constructing L2 page tables\n"); 661 #endif 662 663 /* Map the stack pages */ 664 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 665 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 666 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 667 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 668 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 669 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 670 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 671 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 672 673 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 674 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 675 676 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 677 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 678 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 679 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 680 } 681 682 /* Now we fill in the L2 pagetable for the VRAM */ 683 /* 684 * Current architectures mean that the VRAM is always in 1 685 * continuous bank. This means that we can just map the 2 meg 686 * that the VRAM would occupy. In theory we don't need a page 687 * table for VRAM, we could section map it but we would need 688 * the page tables if DRAM was in use. 689 * XXX please map two adjacent virtual areas to ONE physical 690 * area 691 */ 692 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase, 693 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 694 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size, 695 videomemory.vidm_pbase, videomemory.vidm_size, 696 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 697 698 /* Map the vector page. */ 699 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 700 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 701 702 /* Map the core memory needed before autoconfig */ 703 loop = 0; 704 while (l1_sec_table[loop].size) { 705 vsize_t sz; 706 707 #ifdef VERBOSE_INIT_ARM 708 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 709 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 710 l1_sec_table[loop].va); 711 #endif 712 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 713 pmap_map_section(l1pagetable, 714 l1_sec_table[loop].va + sz, 715 l1_sec_table[loop].pa + sz, 716 l1_sec_table[loop].prot, 717 l1_sec_table[loop].cache); 718 ++loop; 719 } 720 721 /* 722 * Now we have the real page tables in place so we can switch 723 * to them. Once this is done we will be running with the 724 * REAL kernel page tables. 725 */ 726 727 #ifdef VERBOSE_INIT_ARM 728 printf("switching domains\n"); 729 #endif 730 /* be a client to all domains */ 731 cpu_domains(0x55555555); 732 733 /* Switch tables */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("switching to new L1 page table\n"); 736 #endif 737 cpu_setttb(kernel_l1pt.pv_pa, true); 738 739 /* 740 * We must now clean the cache again.... 741 * Cleaning may be done by reading new data to displace any 742 * dirty data in the cache. This will have happened in cpu_setttb() 743 * but since we are boot strapping the addresses used for the read 744 * may have just been remapped and thus the cache could be out 745 * of sync. A re-clean after the switch will cure this. 746 * After booting there are no gross relocations of the kernel thus 747 * this problem will not occur after initarm(). 748 */ 749 cpu_idcache_wbinv_all(); 750 cpu_tlb_flushID(); 751 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 752 753 /* 754 * Moved from cpu_startup() as data_abort_handler() references 755 * this during uvm init 756 */ 757 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 758 759 /* 760 * if there is support for a serial console ...we should now 761 * reattach it 762 */ 763 /* fcomcndetach();*/ 764 765 /* 766 * Reflect videomemory relocation in the videomemory structure 767 * and reinit console 768 */ 769 if (bootconfig.vram[0].pages == 0) { 770 videomemory.vidm_vbase = VMEM_VBASE; 771 } else { 772 videomemory.vidm_vbase = VMEM_VBASE; 773 bootconfig.display_start = VMEM_VBASE; 774 }; 775 vidc_base = (int *) VIDC_BASE; 776 iomd_base = IOMD_BASE; 777 778 #ifdef VERBOSE_INIT_ARM 779 printf("running on the new L1 page table!\n"); 780 printf("done.\n"); 781 #endif 782 783 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("\n"); 787 #endif 788 789 /* 790 * Pages were allocated during the secondary bootstrap for the 791 * stacks for different CPU modes. 792 * We must now set the r13 registers in the different CPU modes to 793 * point to these stacks. 794 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 795 * of the stack memory. 796 */ 797 #ifdef VERBOSE_INIT_ARM 798 printf("init subsystems: stacks "); 799 console_flush(); 800 #endif 801 802 set_stackptr(PSR_IRQ32_MODE, 803 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 804 set_stackptr(PSR_ABT32_MODE, 805 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 806 set_stackptr(PSR_UND32_MODE, 807 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 808 #ifdef VERBOSE_INIT_ARM 809 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 810 kernelstack.pv_pa); 811 #endif /* VERBOSE_INIT_ARM */ 812 813 /* 814 * Well we should set a data abort handler. 815 * Once things get going this will change as we will need a proper 816 * handler. Until then we will use a handler that just panics but 817 * tells us why. 818 * Initialisation of the vectors will just panic on a data abort. 819 * This just fills in a slightly better one. 820 */ 821 #ifdef VERBOSE_INIT_ARM 822 printf("vectors "); 823 #endif 824 data_abort_handler_address = (u_int)data_abort_handler; 825 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 826 undefined_handler_address = (u_int)undefinedinstruction_bounce; 827 console_flush(); 828 829 830 /* 831 * At last ! 832 * We now have the kernel in physical memory from the bottom upwards. 833 * Kernel page tables are physically above this. 834 * The kernel is mapped to 0xf0000000 835 * The kernel data PTs will handle the mapping of 836 * 0xf1000000-0xf5ffffff (80 Mb) 837 * 2Meg of VRAM is mapped to 0xf7000000 838 * The page tables are mapped to 0xefc00000 839 * The IOMD is mapped to 0xf6000000 840 * The VIDC is mapped to 0xf6100000 841 * The IOMD/VIDC could be pushed up higher but i havent got 842 * sufficient documentation to do so; the addresses are not 843 * parametized yet and hard to read... better fix this before; 844 * its pretty unforgiving. 845 */ 846 847 /* Initialise the undefined instruction handlers */ 848 #ifdef VERBOSE_INIT_ARM 849 printf("undefined "); 850 #endif 851 undefined_init(); 852 console_flush(); 853 854 /* Load memory into UVM. */ 855 #ifdef VERBOSE_INIT_ARM 856 printf("page "); 857 #endif 858 uvm_md_init(); 859 860 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 861 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 862 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 863 864 if (start < physical_freestart) 865 start = physical_freestart; 866 if (end > physical_freeend) 867 end = physical_freeend; 868 869 /* XXX Consider DMA range intersection checking. */ 870 871 uvm_page_physload(atop(start), atop(end), 872 atop(start), atop(end), VM_FREELIST_DEFAULT); 873 } 874 875 /* Boot strap pmap telling it where managed kernel virtual memory is */ 876 #ifdef VERBOSE_INIT_ARM 877 printf("pmap "); 878 #endif 879 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 880 console_flush(); 881 882 /* Setup the IRQ system */ 883 #ifdef VERBOSE_INIT_ARM 884 printf("irq "); 885 #endif 886 console_flush(); 887 irq_init(); 888 #ifdef VERBOSE_INIT_ARM 889 printf("done.\n\n"); 890 #endif 891 892 #if NVIDCVIDEO>0 893 consinit(); /* necessary ? */ 894 #endif 895 896 /* Talk to the user */ 897 printf("NetBSD/evbarm booting ... \n"); 898 899 /* Tell the user if his boot loader is too old */ 900 if ((bootconfig.magic < BOOTCONFIG_MAGIC) || 901 (bootconfig.version != BOOTCONFIG_VERSION)) { 902 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n"); 903 delay(5000000); 904 } 905 906 printf("Kernel loaded from file %s\n", bootconfig.kernelname); 907 printf("Kernel arg string (@%p) %s\n", 908 bootconfig.args, bootconfig.args); 909 printf("\nBoot configuration structure reports the following " 910 "memory\n"); 911 912 printf(" DRAM block 0a at %08x size %08x " 913 "DRAM block 0b at %08x size %08x\n\r", 914 bootconfig.dram[0].address, 915 bootconfig.dram[0].pages * bootconfig.pagesize, 916 bootconfig.dram[1].address, 917 bootconfig.dram[1].pages * bootconfig.pagesize); 918 printf(" DRAM block 1a at %08x size %08x " 919 "DRAM block 1b at %08x size %08x\n\r", 920 bootconfig.dram[2].address, 921 bootconfig.dram[2].pages * bootconfig.pagesize, 922 bootconfig.dram[3].address, 923 bootconfig.dram[3].pages * bootconfig.pagesize); 924 printf(" VRAM block 0 at %08x size %08x\n\r", 925 bootconfig.vram[0].address, 926 bootconfig.vram[0].pages * bootconfig.pagesize); 927 928 #if NKSYMS || defined(DDB) || defined(MODULAR) 929 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start, 930 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end); 931 #endif 932 933 934 #ifdef DDB 935 db_machine_init(); 936 if (boothowto & RB_KDB) 937 Debugger(); 938 #endif /* DDB */ 939 940 /* We return the new stack pointer address */ 941 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 942 } 943 944 945 static void 946 process_kernel_args(void) 947 { 948 char *args; 949 950 /* Ok now we will check the arguments for interesting parameters. */ 951 args = bootconfig.args; 952 boothowto = 0; 953 954 /* Only arguments itself are passed from the new bootloader */ 955 while (*args == ' ') 956 ++args; 957 958 boot_args = args; 959 parse_mi_bootargs(boot_args); 960 parse_rpc_bootargs(boot_args); 961 } 962 963 964 void 965 parse_rpc_bootargs(char *args) 966 { 967 int integer; 968 969 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT, 970 &integer)) { 971 videodram_size = integer; 972 /* Round to 4K page */ 973 videodram_size *= 1024; 974 videodram_size = round_page(videodram_size); 975 if (videodram_size > 1024*1024) 976 videodram_size = 1024*1024; 977 } 978 } 979 /* End of machdep.c */ 980
Indexes created Fri Oct 03 02:09:57 GMT 2025