1 /* $NetBSD: hpc_machdep.c,v 1.68 2003/05/22 05:47:10 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 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 112 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 113 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00c00000) 114 #define KERNEL_VM_SIZE 0x05000000 115 116 /* 117 * Address to call from cpu_reset() to reset the machine. 118 * This is machine architecture dependant as it varies depending 119 * on where the ROM appears when you turn the MMU off. 120 */ 121 122 u_int cpu_reset_address = 0; 123 124 /* Define various stack sizes in pages */ 125 #define IRQ_STACK_SIZE 1 126 #define ABT_STACK_SIZE 1 127 #ifdef IPKDB 128 #define UND_STACK_SIZE 2 129 #else 130 #define UND_STACK_SIZE 1 131 #endif 132 133 BootConfig bootconfig; /* Boot config storage */ 134 struct bootinfo *bootinfo, bootinfo_storage; 135 static char booted_kernel_storage[80]; 136 char *booted_kernel = booted_kernel_storage; 137 138 paddr_t physical_start; 139 paddr_t physical_freestart; 140 paddr_t physical_freeend; 141 paddr_t physical_end; 142 int physmem = 0; 143 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 149 /* Physical and virtual addresses for some global pages */ 150 pv_addr_t systempage; 151 pv_addr_t irqstack; 152 pv_addr_t undstack; 153 pv_addr_t abtstack; 154 pv_addr_t kernelstack; 155 156 char *boot_args = NULL; 157 char boot_file[16]; 158 159 vaddr_t msgbufphys; 160 161 extern u_int data_abort_handler_address; 162 extern u_int prefetch_abort_handler_address; 163 extern u_int undefined_handler_address; 164 extern int end; 165 166 #ifdef PMAP_DEBUG 167 extern int pmap_debug_level; 168 #endif /* PMAP_DEBUG */ 169 170 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 171 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 172 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 173 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 174 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 175 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 176 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 177 178 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 179 180 struct user *proc0paddr; 181 182 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 183 extern unsigned int sa1_cache_clean_addr; 184 extern unsigned int sa1_cache_clean_size; 185 static vaddr_t sa1_cc_base; 186 187 /* Non-buffered non-cachable memory needed to enter idle mode */ 188 extern vaddr_t sa11x0_idle_mem; 189 190 /* Prototypes */ 191 192 void physcon_display_base __P((u_int addr)); 193 void consinit __P((void)); 194 195 void data_abort_handler __P((trapframe_t *frame)); 196 void prefetch_abort_handler __P((trapframe_t *frame)); 197 void undefinedinstruction_bounce __P((trapframe_t *frame)); 198 199 u_int cpu_get_control __P((void)); 200 201 void rpc_sa110_cc_setup(void); 202 203 #ifdef DEBUG_BEFOREMMU 204 static void fakecninit(); 205 #endif 206 207 #ifdef BOOT_DUMP 208 void dumppages(char *, int); 209 #endif 210 211 u_int initarm(int, char **, struct bootinfo *); 212 extern int db_trapper(u_int, u_int, trapframe_t *, int); 213 extern void dump_spl_masks __P((void)); 214 extern void dumpsys __P((void)); 215 216 /* 217 * void cpu_reboot(int howto, char *bootstr) 218 * 219 * Reboots the system 220 * 221 * Deal with any syncing, unmounting, dumping and shutdown hooks, 222 * then reset the CPU. 223 */ 224 225 void 226 cpu_reboot(howto, bootstr) 227 int howto; 228 char *bootstr; 229 { 230 /* 231 * If we are still cold then hit the air brakes 232 * and crash to earth fast 233 */ 234 if (cold) { 235 doshutdownhooks(); 236 printf("Halted while still in the ICE age.\n"); 237 printf("The operating system has halted.\n"); 238 printf("Please press any key to reboot.\n\n"); 239 cngetc(); 240 printf("rebooting...\n"); 241 cpu_reset(); 242 /*NOTREACHED*/ 243 } 244 245 /* Disable console buffering */ 246 cnpollc(1); 247 248 /* 249 * If RB_NOSYNC was not specified sync the discs. 250 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 251 * It looks like syslogd is getting woken up only to find that it cannot 252 * page part of the binary in as 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 /* Run any shutdown hooks */ 266 doshutdownhooks(); 267 268 /* Make sure IRQ's are disabled */ 269 IRQdisable; 270 271 if (howto & RB_HALT) { 272 printf("The operating system has halted.\n"); 273 printf("Please press any key to reboot.\n\n"); 274 cngetc(); 275 } 276 277 printf("rebooting...\n"); 278 cpu_reset(); 279 /*NOTREACHED*/ 280 } 281 282 /* 283 * 284 * Initial entry point on startup. This gets called before main() is 285 * entered. 286 * It should be responsible for setting up everything that must be 287 * in place when main is called. 288 * This includes 289 * Taking a copy of the boot configuration structure. 290 * Initialising the physical console so characters can be printed. 291 * Setting up page tables for the kernel 292 */ 293 294 u_int 295 initarm(argc, argv, bi) 296 int argc; 297 char **argv; 298 struct bootinfo *bi; 299 { 300 int loop; 301 u_int kerneldatasize, symbolsize; 302 u_int l1pagetable; 303 vaddr_t freemempos; 304 pv_addr_t kernel_l1pt; 305 vsize_t pt_size; 306 #if NKSYMS || defined(DDB) || defined(LKM) 307 Elf_Shdr *sh; 308 #endif 309 310 /* 311 * Heads up ... Setup the CPU / MMU / TLB functions 312 */ 313 set_cpufuncs(); 314 315 #ifdef DEBUG_BEFOREMMU 316 /* 317 * At this point, we cannot call real consinit(). 318 * Just call a faked up version of consinit(), which does the thing 319 * with MMU disabled. 320 */ 321 fakecninit(); 322 #endif 323 324 /* 325 * XXX for now, overwrite bootconfig to hardcoded values. 326 * XXX kill bootconfig and directly call uvm_physload 327 */ 328 bootconfig.dram[0].address = 0xc0000000; 329 bootconfig.dram[0].pages = 8192; 330 bootconfig.dramblocks = 1; 331 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 332 333 symbolsize = 0; 334 #if NKSYMS || defined(DDB) || defined(LKM) 335 if (! memcmp(&end, "\177ELF", 4)) { 336 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 337 loop = ((Elf_Ehdr *)&end)->e_shnum; 338 for(; loop; loop--, sh++) 339 if (sh->sh_offset > 0 && 340 (sh->sh_offset + sh->sh_size) > symbolsize) 341 symbolsize = sh->sh_offset + sh->sh_size; 342 } 343 #endif 344 345 printf("kernsize=0x%x\n", kerneldatasize); 346 kerneldatasize += symbolsize; 347 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 348 PAGE_SIZE * 8; 349 350 /* parse kernel args */ 351 boot_file[0] = '\0'; 352 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 353 for(argc--, argv++; argc; argc--, argv++) 354 switch(**argv) { 355 case 'a': 356 boothowto |= RB_ASKNAME; 357 break; 358 case 's': 359 boothowto |= RB_SINGLE; 360 break; 361 case 'b': 362 /* boot device: -b=sd0 etc. */ 363 #ifdef NFS 364 if (strcmp(*argv + 2, "nfs") == 0) 365 mountroot = nfs_mountroot; 366 else 367 strncpy(boot_file, *argv + 2, 368 sizeof(boot_file)); 369 #else /* NFS */ 370 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 371 #endif /* NFS */ 372 break; 373 default: 374 break; 375 } 376 377 /* copy bootinfo into known kernel space */ 378 bootinfo_storage = *bi; 379 bootinfo = &bootinfo_storage; 380 381 #ifdef BOOTINFO_FB_WIDTH 382 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 383 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 384 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 385 bootinfo->fb_type = BOOTINFO_FB_TYPE; 386 #endif 387 388 /* 389 * hpcboot has loaded me with MMU disabled. 390 * So create kernel page tables and enable MMU 391 */ 392 393 /* 394 * Set up the variables that define the availablilty of physcial 395 * memory 396 */ 397 physical_start = bootconfig.dram[0].address; 398 physical_freestart = physical_start 399 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 400 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 401 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 402 physical_freeend = physical_end; 403 404 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 405 physmem += bootconfig.dram[loop].pages; 406 407 /* XXX handle UMA framebuffer memory */ 408 409 /* Use the first 256kB to allocate things */ 410 freemempos = KERNEL_BASE; 411 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 412 413 /* 414 * Right We have the bottom meg of memory mapped to 0x00000000 415 * so was can get at it. The kernel will ocupy the start of it. 416 * After the kernel/args we allocate some of the fixed page tables 417 * we need to get the system going. 418 * We allocate one page directory and 8 page tables and store the 419 * physical addresses in the kernel_pt_table array. 420 * Must remember that neither the page L1 or L2 page tables are the 421 * same size as a page ! 422 * 423 * Ok the next bit of physical allocate may look complex but it is 424 * simple really. I have done it like this so that no memory gets 425 * wasted during the allocate of various pages and tables that are 426 * all different sizes. 427 * The start address will be page aligned. 428 * We allocate the kernel page directory on the first free 16KB 429 * boundry we find. 430 * We allocate the kernel page tables on the first 1KB boundry we find. 431 * We allocate 9 PT's. This means that in the process we 432 * KNOW that we will encounter at least 1 16KB boundry. 433 * 434 * Eventually if the top end of the memory gets used for process L1 435 * page tables the kernel L1 page table may be moved up there. 436 */ 437 438 #ifdef VERBOSE_INIT_ARM 439 printf("Allocating page tables\n"); 440 #endif 441 442 /* Define a macro to simplify memory allocation */ 443 #define valloc_pages(var, np) \ 444 (var).pv_pa = (var).pv_va = freemempos; \ 445 freemempos += (np) * PAGE_SIZE; 446 #define alloc_pages(var, np) \ 447 (var) = freemempos; \ 448 freemempos += (np) * PAGE_SIZE; 449 450 451 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 452 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 453 alloc_pages(kernel_pt_table[loop].pv_pa, 454 L2_TABLE_SIZE / PAGE_SIZE); 455 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 456 } 457 458 /* 459 * Allocate a page for the system page mapped to V0x00000000 460 * This page will just contain the system vectors and can be 461 * shared by all processes. 462 */ 463 valloc_pages(systempage, 1); 464 465 pt_size = round_page(freemempos) - KERNEL_BASE; 466 467 /* Allocate stacks for all modes */ 468 valloc_pages(irqstack, IRQ_STACK_SIZE); 469 valloc_pages(abtstack, ABT_STACK_SIZE); 470 valloc_pages(undstack, UND_STACK_SIZE); 471 valloc_pages(kernelstack, UPAGES); 472 473 #ifdef VERBOSE_INIT_ARM 474 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 475 irqstack.pv_va); 476 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 477 abtstack.pv_va); 478 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 479 undstack.pv_va); 480 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 481 kernelstack.pv_va); 482 #endif 483 484 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 485 486 /* 487 * XXX Actually, we only need virtual space and don't need 488 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 489 */ 490 /* 491 * XXX totally stuffed hack to work round problems introduced 492 * in recent versions of the pmap code. Due to the calls used there 493 * we cannot allocate virtual memory during bootstrap. 494 */ 495 for(;;) { 496 alloc_pages(sa1_cc_base, 1); 497 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 498 break; 499 } 500 { 501 vaddr_t dummy; 502 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 503 } 504 sa1_cache_clean_addr = sa1_cc_base; 505 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 506 507 alloc_pages(sa11x0_idle_mem, 1); 508 509 /* 510 * Ok we have allocated physical pages for the primary kernel 511 * page tables 512 */ 513 514 #ifdef VERBOSE_INIT_ARM 515 printf("Creating L1 page table\n"); 516 #endif 517 518 /* 519 * Now we start consturction of the L1 page table 520 * We start by mapping the L2 page tables into the L1. 521 * This means that we can replace L1 mappings later on if necessary 522 */ 523 l1pagetable = kernel_l1pt.pv_pa; 524 525 /* Map the L2 pages tables in the L1 page table */ 526 pmap_link_l2pt(l1pagetable, 0x00000000, 527 &kernel_pt_table[KERNEL_PT_SYS]); 528 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 529 &kernel_pt_table[KERNEL_PT_KERNEL]); 530 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 531 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 532 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 533 534 /* update the top of the kernel VM */ 535 pmap_curmaxkvaddr = 536 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 537 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 538 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 539 &kernel_pt_table[KERNEL_PT_IO]); 540 541 542 #ifdef VERBOSE_INIT_ARM 543 printf("Mapping kernel\n"); 544 #endif 545 546 /* Now we fill in the L2 pagetable for the kernel code/data */ 547 548 /* 549 * XXX there is no ELF header to find RO region. 550 * XXX What should we do? 551 */ 552 #if 0 553 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 554 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 555 physical_start, kernexec->a_text, 556 VM_PROT_READ, PTE_CACHE); 557 logical += pmap_map_chunk(l1pagetable, 558 KERNEL_TEXT_BASE + logical, physical_start + logical, 559 kerneldatasize - kernexec->a_text, 560 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 561 } else 562 #endif 563 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 564 KERNEL_TEXT_BASE, kerneldatasize, 565 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 567 #ifdef VERBOSE_INIT_ARM 568 printf("Constructing L2 page tables\n"); 569 #endif 570 571 /* Map the stack pages */ 572 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 573 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 574 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 575 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 576 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 577 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 579 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 581 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 582 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 583 584 /* Map page tables */ 585 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 586 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 587 588 /* Map a page for entering idle mode */ 589 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 590 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 591 592 /* Map the vector page. */ 593 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 596 /* Map any I/O modules here, as we don't have real bus_space_map() */ 597 printf("mapping IO..."); 598 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 599 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 600 601 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 602 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 /* 604 * Now we have the real page tables in place so we can switch to them. 605 * Once this is done we will be running with the REAL kernel page 606 * tables. 607 */ 608 609 printf("done.\n"); 610 611 /* 612 * Pages were allocated during the secondary bootstrap for the 613 * stacks for different CPU modes. 614 * We must now set the r13 registers in the different CPU modes to 615 * point to these stacks. 616 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 617 * of the stack memory. 618 */ 619 printf("init subsystems: stacks "); 620 621 set_stackptr(PSR_IRQ32_MODE, 622 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 623 set_stackptr(PSR_ABT32_MODE, 624 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 625 set_stackptr(PSR_UND32_MODE, 626 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 627 #ifdef PMAP_DEBUG 628 if (pmap_debug_level >= 0) 629 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 630 kernelstack.pv_pa); 631 #endif /* PMAP_DEBUG */ 632 633 /* 634 * Well we should set a data abort handler. 635 * Once things get going this will change as we will need a proper 636 * handler. Until then we will use a handler that just panics but 637 * tells us why. 638 * Initialisation of the vectors will just panic on a data abort. 639 * This just fills in a slighly better one. 640 */ 641 printf("vectors "); 642 data_abort_handler_address = (u_int)data_abort_handler; 643 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 644 undefined_handler_address = (u_int)undefinedinstruction_bounce; 645 printf("%08x %08x %08x\n", data_abort_handler_address, 646 prefetch_abort_handler_address, undefined_handler_address); 647 648 /* Initialise the undefined instruction handlers */ 649 printf("undefined "); 650 undefined_init(); 651 652 /* Set the page table address. */ 653 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 654 setttb(kernel_l1pt.pv_pa); 655 cpu_tlb_flushID(); 656 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 657 658 /* 659 * Moved from cpu_startup() as data_abort_handler() references 660 * this during uvm init 661 */ 662 proc0paddr = (struct user *)kernelstack.pv_va; 663 lwp0.l_addr = proc0paddr; 664 665 #ifdef BOOT_DUMP 666 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 667 dumppages((char *)0xb0100000, 64); /* XXX */ 668 #endif 669 /* Enable MMU, I-cache, D-cache, write buffer. */ 670 cpufunc_control(0x337f, 0x107d); 671 672 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 673 674 consinit(); 675 676 #ifdef VERBOSE_INIT_ARM 677 printf("freemempos=%08lx\n", freemempos); 678 printf("MMU enabled. control=%08x\n", cpu_get_control()); 679 #endif 680 681 /* Load memory into UVM. */ 682 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 683 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 684 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 685 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 686 687 if (start < physical_freestart) 688 start = physical_freestart; 689 if (end > physical_freeend) 690 end = physical_freeend; 691 692 uvm_page_physload(atop(start), atop(end), 693 atop(start), atop(end), VM_FREELIST_DEFAULT); 694 } 695 696 /* Boot strap pmap telling it where the kernel page table is */ 697 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 698 KERNEL_VM_BASE + KERNEL_VM_SIZE); 699 700 if (cputype == CPU_ID_SA110) 701 rpc_sa110_cc_setup(); 702 703 #ifdef IPKDB 704 /* Initialise ipkdb */ 705 ipkdb_init(); 706 if (boothowto & RB_KDB) 707 ipkdb_connect(0); 708 #endif /* NIPKDB */ 709 710 #ifdef BOOT_DUMP 711 dumppages((char *)kernel_l1pt.pv_va, 16); 712 dumppages((char *)PTE_BASE, 16); 713 #endif 714 715 #ifdef DDB 716 db_machine_init(); 717 #endif 718 #if NKSYMS || defined(DDB) || defined(LKM) 719 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 720 #endif 721 722 printf("kernsize=0x%x", kerneldatasize); 723 printf(" (including 0x%x symbols)\n", symbolsize); 724 725 #ifdef DDB 726 if (boothowto & RB_KDB) 727 Debugger(); 728 #endif /* DDB */ 729 730 if (bootinfo->magic == BOOTINFO_MAGIC) { 731 platid.dw.dw0 = bootinfo->platid_cpu; 732 platid.dw.dw1 = bootinfo->platid_machine; 733 } 734 735 /* We return the new stack pointer address */ 736 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 737 } 738 739 void 740 consinit(void) 741 { 742 static int consinit_called = 0; 743 744 if (consinit_called != 0) 745 return; 746 747 consinit_called = 1; 748 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 749 cninit(); 750 else { 751 /* 752 * Nothing to do here. Console initialization is done at 753 * autoconf device attach time. 754 */ 755 } 756 } 757 758 #ifdef DEBUG_BEFOREMMU 759 cons_decl(sacom); 760 void 761 fakecninit() 762 { 763 static struct consdev fakecntab = cons_init(sacom); 764 cn_tab = &fakecntab; 765 766 (*cn_tab->cn_init)(0); 767 cn_tab->cn_pri = CN_REMOTE; 768 } 769 #endif 770 771 772 /* 773 * For optimal cache cleaning we need two 16K banks of 774 * virtual address space that NOTHING else will access 775 * and then we alternate the cache cleaning between the 776 * two banks. 777 * The cache cleaning code requires requires 2 banks aligned 778 * on total size boundry so the banks can be alternated by 779 * eorring the size bit (assumes the bank size is a power of 2) 780 */ 781 void 782 rpc_sa110_cc_setup(void) 783 { 784 int loop; 785 paddr_t kaddr; 786 pt_entry_t *pte; 787 788 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 789 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 790 pte = vtopte(sa1_cc_base + loop); 791 *pte = L2_S_PROTO | kaddr | 792 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 793 PTE_SYNC(pte); 794 } 795 sa1_cache_clean_addr = sa1_cc_base; 796 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 797 } 798 799 #ifdef BOOT_DUMP 800 void dumppages(char *start, int nbytes) 801 { 802 char *p = start; 803 char *p1; 804 int i; 805 806 for(i = nbytes; i > 0; i -= 16, p += 16) { 807 for(p1 = p + 15; p != p1; p1--) { 808 if (*p1) 809 break; 810 } 811 if (! *p1) 812 continue; 813 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 814 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 815 (unsigned int)p, 816 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 817 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 818 } 819 } 820 #endif 821 822 /* End of machdep.c */ 823