1 /* $NetBSD: hpc_machdep.c,v 1.65 2003/05/03 03:49:07 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * RiscBSD kernel project 38 * 39 * machdep.c 40 * 41 * Machine dependant functions for kernel setup 42 * 43 * This file needs a lot of work. 44 * 45 * Created : 17/09/94 46 */ 47 /* 48 * hpc_machdep.c 49 */ 50 51 #include "opt_ddb.h" 52 #include "opt_pmap_debug.h" 53 #include "fs_nfs.h" 54 55 #include <sys/param.h> 56 #include <sys/systm.h> 57 #include <sys/kernel.h> 58 #include <sys/reboot.h> 59 #include <sys/proc.h> 60 #include <sys/msgbuf.h> 61 #include <sys/exec.h> 62 #include <sys/ksyms.h> 63 64 #include <dev/cons.h> 65 66 #include "ksyms.h" 67 68 #if NKSYMS || defined(DDB) || defined(LKM) 69 #include <machine/db_machdep.h> 70 #include <ddb/db_sym.h> 71 #include <ddb/db_extern.h> 72 #ifndef DB_ELFSIZE 73 #error Must define DB_ELFSIZE! 74 #endif 75 #define ELFSIZE DB_ELFSIZE 76 #include <sys/exec_elf.h> 77 #endif 78 79 #include <uvm/uvm.h> 80 81 #include <machine/signal.h> 82 #include <machine/frame.h> 83 #include <machine/bootconfig.h> 84 #include <machine/cpu.h> 85 #include <machine/io.h> 86 #include <machine/intr.h> 87 #include <arm/arm32/katelib.h> 88 #include <machine/bootinfo.h> 89 #include <arm/cpuconf.h> 90 #include <arm/undefined.h> 91 #include <machine/rtc.h> 92 #include <machine/platid.h> 93 94 #include <arm/sa11x0/sa11x0_reg.h> 95 96 #include <dev/hpc/bicons.h> 97 98 #include "opt_ipkdb.h" 99 100 /* XXX for consinit related hacks */ 101 #include <sys/conf.h> 102 103 #ifdef NFS 104 #include <sys/mount.h> 105 #include <nfs/rpcv2.h> 106 #include <nfs/nfsproto.h> 107 #include <nfs/nfs.h> 108 #include <nfs/nfsmount.h> 109 #endif 110 111 /* 112 * Address to call from cpu_reset() to reset the machine. 113 * This is machine architecture dependant as it varies depending 114 * on where the ROM appears when you turn the MMU off. 115 */ 116 117 u_int cpu_reset_address = 0; 118 119 /* Define various stack sizes in pages */ 120 #define IRQ_STACK_SIZE 1 121 #define ABT_STACK_SIZE 1 122 #ifdef IPKDB 123 #define UND_STACK_SIZE 2 124 #else 125 #define UND_STACK_SIZE 1 126 #endif 127 128 BootConfig bootconfig; /* Boot config storage */ 129 struct bootinfo *bootinfo, bootinfo_storage; 130 static char booted_kernel_storage[80]; 131 char *booted_kernel = booted_kernel_storage; 132 133 paddr_t physical_start; 134 paddr_t physical_freestart; 135 paddr_t physical_freeend; 136 paddr_t physical_end; 137 int physmem = 0; 138 139 #ifndef PMAP_STATIC_L1S 140 int max_processes = 64; /* Default number */ 141 #endif /* !PMAP_STATIC_L1S */ 142 143 144 /* Physical and virtual addresses for some global pages */ 145 pv_addr_t systempage; 146 pv_addr_t irqstack; 147 pv_addr_t undstack; 148 pv_addr_t abtstack; 149 pv_addr_t kernelstack; 150 151 char *boot_args = NULL; 152 char boot_file[16]; 153 154 vaddr_t msgbufphys; 155 156 extern u_int data_abort_handler_address; 157 extern u_int prefetch_abort_handler_address; 158 extern u_int undefined_handler_address; 159 extern int end; 160 161 #ifdef PMAP_DEBUG 162 extern int pmap_debug_level; 163 #endif /* PMAP_DEBUG */ 164 165 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 166 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 167 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 168 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 169 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 170 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 171 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 172 173 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 174 175 struct user *proc0paddr; 176 177 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 178 extern unsigned int sa1_cache_clean_addr; 179 extern unsigned int sa1_cache_clean_size; 180 static vaddr_t sa1_cc_base; 181 182 /* Non-buffered non-cachable memory needed to enter idle mode */ 183 extern vaddr_t sa11x0_idle_mem; 184 185 /* Prototypes */ 186 187 void physcon_display_base __P((u_int addr)); 188 void consinit __P((void)); 189 190 void data_abort_handler __P((trapframe_t *frame)); 191 void prefetch_abort_handler __P((trapframe_t *frame)); 192 void undefinedinstruction_bounce __P((trapframe_t *frame)); 193 194 u_int cpu_get_control __P((void)); 195 196 void rpc_sa110_cc_setup(void); 197 198 #ifdef DEBUG_BEFOREMMU 199 static void fakecninit(); 200 #endif 201 202 #ifdef BOOT_DUMP 203 void dumppages(char *, int); 204 #endif 205 206 u_int initarm(int, char **, struct bootinfo *); 207 extern int db_trapper(u_int, u_int, trapframe_t *, int); 208 extern void dump_spl_masks __P((void)); 209 extern void dumpsys __P((void)); 210 211 /* 212 * void cpu_reboot(int howto, char *bootstr) 213 * 214 * Reboots the system 215 * 216 * Deal with any syncing, unmounting, dumping and shutdown hooks, 217 * then reset the CPU. 218 */ 219 220 void 221 cpu_reboot(howto, bootstr) 222 int howto; 223 char *bootstr; 224 { 225 /* 226 * If we are still cold then hit the air brakes 227 * and crash to earth fast 228 */ 229 if (cold) { 230 doshutdownhooks(); 231 printf("Halted while still in the ICE age.\n"); 232 printf("The operating system has halted.\n"); 233 printf("Please press any key to reboot.\n\n"); 234 cngetc(); 235 printf("rebooting...\n"); 236 cpu_reset(); 237 /*NOTREACHED*/ 238 } 239 240 /* Disable console buffering */ 241 cnpollc(1); 242 243 /* 244 * If RB_NOSYNC was not specified sync the discs. 245 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 246 * It looks like syslogd is getting woken up only to find that it cannot 247 * page part of the binary in as 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 /* Run any shutdown hooks */ 261 doshutdownhooks(); 262 263 /* Make sure IRQ's are disabled */ 264 IRQdisable; 265 266 if (howto & RB_HALT) { 267 printf("The operating system has halted.\n"); 268 printf("Please press any key to reboot.\n\n"); 269 cngetc(); 270 } 271 272 printf("rebooting...\n"); 273 cpu_reset(); 274 /*NOTREACHED*/ 275 } 276 277 /* 278 * 279 * Initial entry point on startup. This gets called before main() is 280 * entered. 281 * It should be responsible for setting up everything that must be 282 * in place when main is called. 283 * This includes 284 * Taking a copy of the boot configuration structure. 285 * Initialising the physical console so characters can be printed. 286 * Setting up page tables for the kernel 287 */ 288 289 u_int 290 initarm(argc, argv, bi) 291 int argc; 292 char **argv; 293 struct bootinfo *bi; 294 { 295 int loop; 296 u_int kerneldatasize, symbolsize; 297 u_int l1pagetable; 298 vaddr_t freemempos; 299 pv_addr_t kernel_l1pt; 300 vsize_t pt_size; 301 #if NKSYMS || defined(DDB) || defined(LKM) 302 Elf_Shdr *sh; 303 #endif 304 305 /* 306 * Heads up ... Setup the CPU / MMU / TLB functions 307 */ 308 set_cpufuncs(); 309 310 #ifdef DEBUG_BEFOREMMU 311 /* 312 * At this point, we cannot call real consinit(). 313 * Just call a faked up version of consinit(), which does the thing 314 * with MMU disabled. 315 */ 316 fakecninit(); 317 #endif 318 319 /* 320 * XXX for now, overwrite bootconfig to hardcoded values. 321 * XXX kill bootconfig and directly call uvm_physload 322 */ 323 bootconfig.dram[0].address = 0xc0000000; 324 bootconfig.dram[0].pages = 8192; 325 bootconfig.dramblocks = 1; 326 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 327 328 symbolsize = 0; 329 #if NKSYMS || defined(DDB) || defined(LKM) 330 if (! memcmp(&end, "\177ELF", 4)) { 331 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 332 loop = ((Elf_Ehdr *)&end)->e_shnum; 333 for(; loop; loop--, sh++) 334 if (sh->sh_offset > 0 && 335 (sh->sh_offset + sh->sh_size) > symbolsize) 336 symbolsize = sh->sh_offset + sh->sh_size; 337 } 338 #endif 339 340 printf("kernsize=0x%x\n", kerneldatasize); 341 kerneldatasize += symbolsize; 342 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 343 PAGE_SIZE * 8; 344 345 /* parse kernel args */ 346 boot_file[0] = '\0'; 347 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 348 for(argc--, argv++; argc; argc--, argv++) 349 switch(**argv) { 350 case 'a': 351 boothowto |= RB_ASKNAME; 352 break; 353 case 's': 354 boothowto |= RB_SINGLE; 355 break; 356 case 'b': 357 /* boot device: -b=sd0 etc. */ 358 #ifdef NFS 359 if (strcmp(*argv + 2, "nfs") == 0) 360 mountroot = nfs_mountroot; 361 else 362 strncpy(boot_file, *argv + 2, 363 sizeof(boot_file)); 364 #else /* NFS */ 365 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 366 #endif /* NFS */ 367 break; 368 default: 369 break; 370 } 371 372 /* copy bootinfo into known kernel space */ 373 bootinfo_storage = *bi; 374 bootinfo = &bootinfo_storage; 375 376 #ifdef BOOTINFO_FB_WIDTH 377 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 378 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 379 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 380 bootinfo->fb_type = BOOTINFO_FB_TYPE; 381 #endif 382 383 /* 384 * hpcboot has loaded me with MMU disabled. 385 * So create kernel page tables and enable MMU 386 */ 387 388 /* 389 * Set up the variables that define the availablilty of physcial 390 * memory 391 */ 392 physical_start = bootconfig.dram[0].address; 393 physical_freestart = physical_start 394 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 395 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 396 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 397 physical_freeend = physical_end; 398 399 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 400 physmem += bootconfig.dram[loop].pages; 401 402 /* XXX handle UMA framebuffer memory */ 403 404 /* Use the first 256kB to allocate things */ 405 freemempos = KERNEL_BASE; 406 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 407 408 /* 409 * Right We have the bottom meg of memory mapped to 0x00000000 410 * so was can get at it. The kernel will ocupy the start of it. 411 * After the kernel/args we allocate some of the fixed page tables 412 * we need to get the system going. 413 * We allocate one page directory and 8 page tables and store the 414 * physical addresses in the kernel_pt_table array. 415 * Must remember that neither the page L1 or L2 page tables are the 416 * same size as a page ! 417 * 418 * Ok the next bit of physical allocate may look complex but it is 419 * simple really. I have done it like this so that no memory gets 420 * wasted during the allocate of various pages and tables that are 421 * all different sizes. 422 * The start address will be page aligned. 423 * We allocate the kernel page directory on the first free 16KB 424 * boundry we find. 425 * We allocate the kernel page tables on the first 1KB boundry we find. 426 * We allocate 9 PT's. This means that in the process we 427 * KNOW that we will encounter at least 1 16KB boundry. 428 * 429 * Eventually if the top end of the memory gets used for process L1 430 * page tables the kernel L1 page table may be moved up there. 431 */ 432 433 #ifdef VERBOSE_INIT_ARM 434 printf("Allocating page tables\n"); 435 #endif 436 437 /* Define a macro to simplify memory allocation */ 438 #define valloc_pages(var, np) \ 439 (var).pv_pa = (var).pv_va = freemempos; \ 440 freemempos += (np) * PAGE_SIZE; 441 #define alloc_pages(var, np) \ 442 (var) = freemempos; \ 443 freemempos += (np) * PAGE_SIZE; 444 445 446 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 447 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 448 alloc_pages(kernel_pt_table[loop].pv_pa, 449 L2_TABLE_SIZE / PAGE_SIZE); 450 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 451 } 452 453 /* 454 * Allocate a page for the system page mapped to V0x00000000 455 * This page will just contain the system vectors and can be 456 * shared by all processes. 457 */ 458 valloc_pages(systempage, 1); 459 460 pt_size = round_page(freemempos) - KERNEL_BASE; 461 462 /* Allocate stacks for all modes */ 463 valloc_pages(irqstack, IRQ_STACK_SIZE); 464 valloc_pages(abtstack, ABT_STACK_SIZE); 465 valloc_pages(undstack, UND_STACK_SIZE); 466 valloc_pages(kernelstack, UPAGES); 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 470 irqstack.pv_va); 471 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 472 abtstack.pv_va); 473 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 474 undstack.pv_va); 475 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 476 kernelstack.pv_va); 477 #endif 478 479 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 480 481 /* 482 * XXX Actually, we only need virtual space and don't need 483 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 484 */ 485 /* 486 * XXX totally stuffed hack to work round problems introduced 487 * in recent versions of the pmap code. Due to the calls used there 488 * we cannot allocate virtual memory during bootstrap. 489 */ 490 for(;;) { 491 alloc_pages(sa1_cc_base, 1); 492 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 493 break; 494 } 495 { 496 vaddr_t dummy; 497 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 498 } 499 sa1_cache_clean_addr = sa1_cc_base; 500 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 501 502 alloc_pages(sa11x0_idle_mem, 1); 503 504 /* 505 * Ok we have allocated physical pages for the primary kernel 506 * page tables 507 */ 508 509 #ifdef VERBOSE_INIT_ARM 510 printf("Creating L1 page table\n"); 511 #endif 512 513 /* 514 * Now we start consturction of the L1 page table 515 * We start by mapping the L2 page tables into the L1. 516 * This means that we can replace L1 mappings later on if necessary 517 */ 518 l1pagetable = kernel_l1pt.pv_pa; 519 520 /* Map the L2 pages tables in the L1 page table */ 521 pmap_link_l2pt(l1pagetable, 0x00000000, 522 &kernel_pt_table[KERNEL_PT_SYS]); 523 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 524 &kernel_pt_table[KERNEL_PT_KERNEL]); 525 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 526 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 527 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 528 529 /* update the top of the kernel VM */ 530 pmap_curmaxkvaddr = 531 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 532 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 533 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 534 &kernel_pt_table[KERNEL_PT_IO]); 535 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("Mapping kernel\n"); 539 #endif 540 541 /* Now we fill in the L2 pagetable for the kernel code/data */ 542 543 /* 544 * XXX there is no ELF header to find RO region. 545 * XXX What should we do? 546 */ 547 #if 0 548 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 549 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 550 physical_start, kernexec->a_text, 551 VM_PROT_READ, PTE_CACHE); 552 logical += pmap_map_chunk(l1pagetable, 553 KERNEL_TEXT_BASE + logical, physical_start + logical, 554 kerneldatasize - kernexec->a_text, 555 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 556 } else 557 #endif 558 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 559 KERNEL_TEXT_BASE, kerneldatasize, 560 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Constructing L2 page tables\n"); 564 #endif 565 566 /* Map the stack pages */ 567 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 568 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 570 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 572 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 574 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 577 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 578 579 /* Map page tables */ 580 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 581 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 582 583 /* Map a page for entering idle mode */ 584 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 585 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 586 587 /* Map the vector page. */ 588 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 589 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 590 591 /* Map any I/O modules here, as we don't have real bus_space_map() */ 592 printf("mapping IO..."); 593 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 595 596 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 597 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 /* 599 * Now we have the real page tables in place so we can switch to them. 600 * Once this is done we will be running with the REAL kernel page 601 * tables. 602 */ 603 604 printf("done.\n"); 605 606 /* 607 * Pages were allocated during the secondary bootstrap for the 608 * stacks for different CPU modes. 609 * We must now set the r13 registers in the different CPU modes to 610 * point to these stacks. 611 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 612 * of the stack memory. 613 */ 614 printf("init subsystems: stacks "); 615 616 set_stackptr(PSR_IRQ32_MODE, 617 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 618 set_stackptr(PSR_ABT32_MODE, 619 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 620 set_stackptr(PSR_UND32_MODE, 621 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 622 #ifdef PMAP_DEBUG 623 if (pmap_debug_level >= 0) 624 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 625 kernelstack.pv_pa); 626 #endif /* PMAP_DEBUG */ 627 628 /* 629 * Well we should set a data abort handler. 630 * Once things get going this will change as we will need a proper 631 * handler. Until then we will use a handler that just panics but 632 * tells us why. 633 * Initialisation of the vectors will just panic on a data abort. 634 * This just fills in a slighly better one. 635 */ 636 printf("vectors "); 637 data_abort_handler_address = (u_int)data_abort_handler; 638 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 639 undefined_handler_address = (u_int)undefinedinstruction_bounce; 640 printf("%08x %08x %08x\n", data_abort_handler_address, 641 prefetch_abort_handler_address, undefined_handler_address); 642 643 /* Initialise the undefined instruction handlers */ 644 printf("undefined "); 645 undefined_init(); 646 647 /* Set the page table address. */ 648 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 649 setttb(kernel_l1pt.pv_pa); 650 cpu_tlb_flushID(); 651 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 652 653 /* 654 * Moved from cpu_startup() as data_abort_handler() references 655 * this during uvm init 656 */ 657 proc0paddr = (struct user *)kernelstack.pv_va; 658 lwp0.l_addr = proc0paddr; 659 660 #ifdef BOOT_DUMP 661 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 662 dumppages((char *)0xb0100000, 64); /* XXX */ 663 #endif 664 /* Enable MMU, I-cache, D-cache, write buffer. */ 665 cpufunc_control(0x337f, 0x107d); 666 667 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 668 669 consinit(); 670 671 #ifdef VERBOSE_INIT_ARM 672 printf("freemempos=%08lx\n", freemempos); 673 printf("MMU enabled. control=%08x\n", cpu_get_control()); 674 #endif 675 676 /* Load memory into UVM. */ 677 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 678 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 679 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 680 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 681 682 if (start < physical_freestart) 683 start = physical_freestart; 684 if (end > physical_freeend) 685 end = physical_freeend; 686 687 uvm_page_physload(atop(start), atop(end), 688 atop(start), atop(end), VM_FREELIST_DEFAULT); 689 } 690 691 /* Boot strap pmap telling it where the kernel page table is */ 692 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 693 KERNEL_VM_BASE + KERNEL_VM_SIZE); 694 695 if (cputype == CPU_ID_SA110) 696 rpc_sa110_cc_setup(); 697 698 #ifdef IPKDB 699 /* Initialise ipkdb */ 700 ipkdb_init(); 701 if (boothowto & RB_KDB) 702 ipkdb_connect(0); 703 #endif /* NIPKDB */ 704 705 #ifdef BOOT_DUMP 706 dumppages((char *)kernel_l1pt.pv_va, 16); 707 dumppages((char *)PTE_BASE, 16); 708 #endif 709 710 #ifdef DDB 711 db_machine_init(); 712 #endif 713 #if NKSYMS || defined(DDB) || defined(LKM) 714 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 715 #endif 716 717 printf("kernsize=0x%x", kerneldatasize); 718 printf(" (including 0x%x symbols)\n", symbolsize); 719 720 #ifdef DDB 721 if (boothowto & RB_KDB) 722 Debugger(); 723 #endif /* DDB */ 724 725 if (bootinfo->magic == BOOTINFO_MAGIC) { 726 platid.dw.dw0 = bootinfo->platid_cpu; 727 platid.dw.dw1 = bootinfo->platid_machine; 728 } 729 730 /* We return the new stack pointer address */ 731 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 732 } 733 734 void 735 consinit(void) 736 { 737 static int consinit_called = 0; 738 739 if (consinit_called != 0) 740 return; 741 742 consinit_called = 1; 743 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 744 cninit(); 745 else { 746 /* 747 * Nothing to do here. Console initialization is done at 748 * autoconf device attach time. 749 */ 750 } 751 } 752 753 #ifdef DEBUG_BEFOREMMU 754 cons_decl(sacom); 755 void 756 fakecninit() 757 { 758 static struct consdev fakecntab = cons_init(sacom); 759 cn_tab = &fakecntab; 760 761 (*cn_tab->cn_init)(0); 762 cn_tab->cn_pri = CN_REMOTE; 763 } 764 #endif 765 766 767 /* 768 * For optimal cache cleaning we need two 16K banks of 769 * virtual address space that NOTHING else will access 770 * and then we alternate the cache cleaning between the 771 * two banks. 772 * The cache cleaning code requires requires 2 banks aligned 773 * on total size boundry so the banks can be alternated by 774 * eorring the size bit (assumes the bank size is a power of 2) 775 */ 776 void 777 rpc_sa110_cc_setup(void) 778 { 779 int loop; 780 paddr_t kaddr; 781 pt_entry_t *pte; 782 783 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 784 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 785 pte = vtopte(sa1_cc_base + loop); 786 *pte = L2_S_PROTO | kaddr | 787 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 788 PTE_SYNC(pte); 789 } 790 sa1_cache_clean_addr = sa1_cc_base; 791 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 792 } 793 794 #ifdef BOOT_DUMP 795 void dumppages(char *start, int nbytes) 796 { 797 char *p = start; 798 char *p1; 799 int i; 800 801 for(i = nbytes; i > 0; i -= 16, p += 16) { 802 for(p1 = p + 15; p != p1; p1--) { 803 if (*p1) 804 break; 805 } 806 if (! *p1) 807 continue; 808 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 809 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 810 (unsigned int)p, 811 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 812 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 813 } 814 } 815 #endif 816 817 /* End of machdep.c */ 818