1 /* $NetBSD: hpc_machdep.c,v 1.71 2004/08/06 15:10:19 rearnsha 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 <sys/cdefs.h> 52 __KERNEL_RCSID(0, "$NetBSD: hpc_machdep.c,v 1.71 2004/08/06 15:10:19 rearnsha Exp $"); 53 54 #include "opt_ddb.h" 55 #include "opt_pmap_debug.h" 56 #include "fs_nfs.h" 57 58 #include <sys/param.h> 59 #include <sys/systm.h> 60 #include <sys/kernel.h> 61 #include <sys/reboot.h> 62 #include <sys/proc.h> 63 #include <sys/msgbuf.h> 64 #include <sys/exec.h> 65 #include <sys/ksyms.h> 66 67 #include <dev/cons.h> 68 69 #include "ksyms.h" 70 71 #if NKSYMS || defined(DDB) || defined(LKM) 72 #include <machine/db_machdep.h> 73 #include <ddb/db_sym.h> 74 #include <ddb/db_extern.h> 75 #ifndef DB_ELFSIZE 76 #error Must define DB_ELFSIZE! 77 #endif 78 #define ELFSIZE DB_ELFSIZE 79 #include <sys/exec_elf.h> 80 #endif 81 82 #include <uvm/uvm.h> 83 84 #include <machine/signal.h> 85 #include <machine/frame.h> 86 #include <machine/bootconfig.h> 87 #include <machine/cpu.h> 88 #include <machine/io.h> 89 #include <machine/intr.h> 90 #include <arm/arm32/katelib.h> 91 #include <machine/bootinfo.h> 92 #include <arm/cpuconf.h> 93 #include <arm/undefined.h> 94 #include <machine/rtc.h> 95 #include <machine/platid.h> 96 97 #include <arm/sa11x0/sa11x0_reg.h> 98 99 #include <dev/hpc/bicons.h> 100 101 #include "opt_ipkdb.h" 102 103 /* XXX for consinit related hacks */ 104 #include <sys/conf.h> 105 106 #ifdef NFS 107 #include <sys/mount.h> 108 #include <nfs/rpcv2.h> 109 #include <nfs/nfsproto.h> 110 #include <nfs/nfs.h> 111 #include <nfs/nfsmount.h> 112 #endif 113 114 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 115 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 116 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00c00000) 117 #define KERNEL_VM_SIZE 0x05000000 118 119 /* 120 * Address to call from cpu_reset() to reset the machine. 121 * This is machine architecture dependant as it varies depending 122 * on where the ROM appears when you turn the MMU off. 123 */ 124 125 u_int cpu_reset_address = 0; 126 127 /* Define various stack sizes in pages */ 128 #define IRQ_STACK_SIZE 1 129 #define ABT_STACK_SIZE 1 130 #ifdef IPKDB 131 #define UND_STACK_SIZE 2 132 #else 133 #define UND_STACK_SIZE 1 134 #endif 135 136 BootConfig bootconfig; /* Boot config storage */ 137 struct bootinfo *bootinfo, bootinfo_storage; 138 static char booted_kernel_storage[80]; 139 char *booted_kernel = booted_kernel_storage; 140 141 paddr_t physical_start; 142 paddr_t physical_freestart; 143 paddr_t physical_freeend; 144 paddr_t physical_end; 145 int physmem = 0; 146 147 #ifndef PMAP_STATIC_L1S 148 int max_processes = 64; /* Default number */ 149 #endif /* !PMAP_STATIC_L1S */ 150 151 152 /* Physical and virtual addresses for some global pages */ 153 pv_addr_t systempage; 154 pv_addr_t irqstack; 155 pv_addr_t undstack; 156 pv_addr_t abtstack; 157 pv_addr_t kernelstack; 158 159 char *boot_args = NULL; 160 char boot_file[16]; 161 162 vaddr_t msgbufphys; 163 164 extern u_int data_abort_handler_address; 165 extern u_int prefetch_abort_handler_address; 166 extern u_int undefined_handler_address; 167 extern int end; 168 169 #ifdef PMAP_DEBUG 170 extern int pmap_debug_level; 171 #endif /* PMAP_DEBUG */ 172 173 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 174 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 175 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 176 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 177 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 178 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 179 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 180 181 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 182 183 struct user *proc0paddr; 184 185 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 186 extern unsigned int sa1_cache_clean_addr; 187 extern unsigned int sa1_cache_clean_size; 188 static vaddr_t sa1_cc_base; 189 190 /* Non-buffered non-cachable memory needed to enter idle mode */ 191 extern vaddr_t sa11x0_idle_mem; 192 193 /* Prototypes */ 194 195 void physcon_display_base __P((u_int addr)); 196 void consinit __P((void)); 197 198 void data_abort_handler __P((trapframe_t *frame)); 199 void prefetch_abort_handler __P((trapframe_t *frame)); 200 void undefinedinstruction_bounce __P((trapframe_t *frame)); 201 202 u_int cpu_get_control __P((void)); 203 204 void rpc_sa110_cc_setup(void); 205 206 #ifdef DEBUG_BEFOREMMU 207 static void fakecninit(); 208 #endif 209 210 #ifdef BOOT_DUMP 211 void dumppages(char *, int); 212 #endif 213 214 u_int initarm(int, char **, struct bootinfo *); 215 extern void dump_spl_masks __P((void)); 216 extern void dumpsys __P((void)); 217 218 /* 219 * void cpu_reboot(int howto, char *bootstr) 220 * 221 * Reboots the system 222 * 223 * Deal with any syncing, unmounting, dumping and shutdown hooks, 224 * then reset the CPU. 225 */ 226 227 void 228 cpu_reboot(howto, bootstr) 229 int howto; 230 char *bootstr; 231 { 232 /* 233 * If we are still cold then hit the air brakes 234 * and crash to earth fast 235 */ 236 if (cold) { 237 doshutdownhooks(); 238 printf("Halted while still in the ICE age.\n"); 239 printf("The operating system has halted.\n"); 240 printf("Please press any key to reboot.\n\n"); 241 cngetc(); 242 printf("rebooting...\n"); 243 cpu_reset(); 244 /*NOTREACHED*/ 245 } 246 247 /* Disable console buffering */ 248 cnpollc(1); 249 250 /* 251 * If RB_NOSYNC was not specified sync the discs. 252 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 253 * It looks like syslogd is getting woken up only to find that it cannot 254 * page part of the binary in as the filesystem has been unmounted. 255 */ 256 if (!(howto & RB_NOSYNC)) 257 bootsync(); 258 259 /* Say NO to interrupts */ 260 splhigh(); 261 262 /* Do a dump if requested. */ 263 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 264 dumpsys(); 265 266 267 /* Run any shutdown hooks */ 268 doshutdownhooks(); 269 270 /* Make sure IRQ's are disabled */ 271 IRQdisable; 272 273 if (howto & RB_HALT) { 274 printf("The operating system has halted.\n"); 275 printf("Please press any key to reboot.\n\n"); 276 cngetc(); 277 } 278 279 printf("rebooting...\n"); 280 cpu_reset(); 281 /*NOTREACHED*/ 282 } 283 284 /* Number of DRAM pages which are installed */ 285 /* Units are 4K pages, so 8192 is 32 MB of memory */ 286 #ifndef DRAM_PAGES 287 #define DRAM_PAGES 8192 288 #endif 289 290 /* 291 * 292 * Initial entry point on startup. This gets called before main() is 293 * entered. 294 * It should be responsible for setting up everything that must be 295 * in place when main is called. 296 * This includes 297 * Taking a copy of the boot configuration structure. 298 * Initialising the physical console so characters can be printed. 299 * Setting up page tables for the kernel 300 */ 301 302 u_int 303 initarm(argc, argv, bi) 304 int argc; 305 char **argv; 306 struct bootinfo *bi; 307 { 308 int loop; 309 u_int kerneldatasize, symbolsize; 310 u_int l1pagetable; 311 vaddr_t freemempos; 312 pv_addr_t kernel_l1pt; 313 vsize_t pt_size; 314 #if NKSYMS || defined(DDB) || defined(LKM) 315 Elf_Shdr *sh; 316 #endif 317 318 /* 319 * Heads up ... Setup the CPU / MMU / TLB functions 320 */ 321 set_cpufuncs(); 322 323 #ifdef DEBUG_BEFOREMMU 324 /* 325 * At this point, we cannot call real consinit(). 326 * Just call a faked up version of consinit(), which does the thing 327 * with MMU disabled. 328 */ 329 fakecninit(); 330 #endif 331 332 /* 333 * XXX for now, overwrite bootconfig to hardcoded values. 334 * XXX kill bootconfig and directly call uvm_physload 335 */ 336 bootconfig.dram[0].address = 0xc0000000; 337 bootconfig.dram[0].pages = DRAM_PAGES; 338 bootconfig.dramblocks = 1; 339 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 340 341 symbolsize = 0; 342 #if NKSYMS || defined(DDB) || defined(LKM) 343 if (! memcmp(&end, "\177ELF", 4)) { 344 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 345 loop = ((Elf_Ehdr *)&end)->e_shnum; 346 for(; loop; loop--, sh++) 347 if (sh->sh_offset > 0 && 348 (sh->sh_offset + sh->sh_size) > symbolsize) 349 symbolsize = sh->sh_offset + sh->sh_size; 350 } 351 #endif 352 353 printf("kernsize=0x%x\n", kerneldatasize); 354 kerneldatasize += symbolsize; 355 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 356 PAGE_SIZE * 8; 357 358 /* parse kernel args */ 359 boot_file[0] = '\0'; 360 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 361 for(argc--, argv++; argc; argc--, argv++) 362 switch(**argv) { 363 case 'a': 364 boothowto |= RB_ASKNAME; 365 break; 366 case 's': 367 boothowto |= RB_SINGLE; 368 break; 369 case 'b': 370 /* boot device: -b=sd0 etc. */ 371 #ifdef NFS 372 if (strcmp(*argv + 2, "nfs") == 0) 373 mountroot = nfs_mountroot; 374 else 375 strncpy(boot_file, *argv + 2, 376 sizeof(boot_file)); 377 #else /* NFS */ 378 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 379 #endif /* NFS */ 380 break; 381 default: 382 break; 383 } 384 385 /* copy bootinfo into known kernel space */ 386 bootinfo_storage = *bi; 387 bootinfo = &bootinfo_storage; 388 389 #ifdef BOOTINFO_FB_WIDTH 390 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 391 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 392 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 393 bootinfo->fb_type = BOOTINFO_FB_TYPE; 394 #endif 395 396 /* 397 * hpcboot has loaded me with MMU disabled. 398 * So create kernel page tables and enable MMU 399 */ 400 401 /* 402 * Set up the variables that define the availablilty of physcial 403 * memory 404 */ 405 physical_start = bootconfig.dram[0].address; 406 physical_freestart = physical_start 407 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 408 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 409 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 410 physical_freeend = physical_end; 411 412 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 413 physmem += bootconfig.dram[loop].pages; 414 415 /* XXX handle UMA framebuffer memory */ 416 417 /* Use the first 256kB to allocate things */ 418 freemempos = KERNEL_BASE; 419 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 420 421 /* 422 * Right We have the bottom meg of memory mapped to 0x00000000 423 * so was can get at it. The kernel will ocupy the start of it. 424 * After the kernel/args we allocate some of the fixed page tables 425 * we need to get the system going. 426 * We allocate one page directory and 8 page tables and store the 427 * physical addresses in the kernel_pt_table array. 428 * Must remember that neither the page L1 or L2 page tables are the 429 * same size as a page ! 430 * 431 * Ok the next bit of physical allocate may look complex but it is 432 * simple really. I have done it like this so that no memory gets 433 * wasted during the allocate of various pages and tables that are 434 * all different sizes. 435 * The start address will be page aligned. 436 * We allocate the kernel page directory on the first free 16KB 437 * boundry we find. 438 * We allocate the kernel page tables on the first 1KB boundry we find. 439 * We allocate 9 PT's. This means that in the process we 440 * KNOW that we will encounter at least 1 16KB boundry. 441 * 442 * Eventually if the top end of the memory gets used for process L1 443 * page tables the kernel L1 page table may be moved up there. 444 */ 445 446 #ifdef VERBOSE_INIT_ARM 447 printf("Allocating page tables\n"); 448 #endif 449 450 /* Define a macro to simplify memory allocation */ 451 #define valloc_pages(var, np) \ 452 (var).pv_pa = (var).pv_va = freemempos; \ 453 freemempos += (np) * PAGE_SIZE; 454 #define alloc_pages(var, np) \ 455 (var) = freemempos; \ 456 freemempos += (np) * PAGE_SIZE; 457 458 459 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 460 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 461 alloc_pages(kernel_pt_table[loop].pv_pa, 462 L2_TABLE_SIZE / PAGE_SIZE); 463 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 464 } 465 466 /* 467 * Allocate a page for the system page mapped to V0x00000000 468 * This page will just contain the system vectors and can be 469 * shared by all processes. 470 */ 471 valloc_pages(systempage, 1); 472 473 pt_size = round_page(freemempos) - KERNEL_BASE; 474 475 /* Allocate stacks for all modes */ 476 valloc_pages(irqstack, IRQ_STACK_SIZE); 477 valloc_pages(abtstack, ABT_STACK_SIZE); 478 valloc_pages(undstack, UND_STACK_SIZE); 479 valloc_pages(kernelstack, UPAGES); 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 483 irqstack.pv_va); 484 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 485 abtstack.pv_va); 486 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 487 undstack.pv_va); 488 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 489 kernelstack.pv_va); 490 #endif 491 492 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 493 494 /* 495 * XXX Actually, we only need virtual space and don't need 496 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 497 */ 498 /* 499 * XXX totally stuffed hack to work round problems introduced 500 * in recent versions of the pmap code. Due to the calls used there 501 * we cannot allocate virtual memory during bootstrap. 502 */ 503 for(;;) { 504 alloc_pages(sa1_cc_base, 1); 505 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 506 break; 507 } 508 { 509 vaddr_t dummy; 510 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 511 } 512 sa1_cache_clean_addr = sa1_cc_base; 513 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 514 515 alloc_pages(sa11x0_idle_mem, 1); 516 517 /* 518 * Ok we have allocated physical pages for the primary kernel 519 * page tables 520 */ 521 522 #ifdef VERBOSE_INIT_ARM 523 printf("Creating L1 page table\n"); 524 #endif 525 526 /* 527 * Now we start consturction of the L1 page table 528 * We start by mapping the L2 page tables into the L1. 529 * This means that we can replace L1 mappings later on if necessary 530 */ 531 l1pagetable = kernel_l1pt.pv_pa; 532 533 /* Map the L2 pages tables in the L1 page table */ 534 pmap_link_l2pt(l1pagetable, 0x00000000, 535 &kernel_pt_table[KERNEL_PT_SYS]); 536 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 537 &kernel_pt_table[KERNEL_PT_KERNEL]); 538 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 539 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 540 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 541 542 /* update the top of the kernel VM */ 543 pmap_curmaxkvaddr = 544 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 545 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 546 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 547 &kernel_pt_table[KERNEL_PT_IO]); 548 549 550 #ifdef VERBOSE_INIT_ARM 551 printf("Mapping kernel\n"); 552 #endif 553 554 /* Now we fill in the L2 pagetable for the kernel code/data */ 555 556 /* 557 * XXX there is no ELF header to find RO region. 558 * XXX What should we do? 559 */ 560 #if 0 561 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 562 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 563 physical_start, kernexec->a_text, 564 VM_PROT_READ, PTE_CACHE); 565 logical += pmap_map_chunk(l1pagetable, 566 KERNEL_TEXT_BASE + logical, physical_start + logical, 567 kerneldatasize - kernexec->a_text, 568 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 } else 570 #endif 571 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 572 KERNEL_TEXT_BASE, kerneldatasize, 573 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 574 575 #ifdef VERBOSE_INIT_ARM 576 printf("Constructing L2 page tables\n"); 577 #endif 578 579 /* Map the stack pages */ 580 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 581 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 583 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 584 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 585 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 586 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 587 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 589 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 590 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 591 592 /* Map page tables */ 593 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 594 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 595 596 /* Map a page for entering idle mode */ 597 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 598 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 599 600 /* Map the vector page. */ 601 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 602 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 604 /* Map any I/O modules here, as we don't have real bus_space_map() */ 605 printf("mapping IO..."); 606 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 607 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 608 609 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 610 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 611 /* 612 * Now we have the real page tables in place so we can switch to them. 613 * Once this is done we will be running with the REAL kernel page 614 * tables. 615 */ 616 617 printf("done.\n"); 618 619 /* 620 * Pages were allocated during the secondary bootstrap for the 621 * stacks for different CPU modes. 622 * We must now set the r13 registers in the different CPU modes to 623 * point to these stacks. 624 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 625 * of the stack memory. 626 */ 627 printf("init subsystems: stacks "); 628 629 set_stackptr(PSR_IRQ32_MODE, 630 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 631 set_stackptr(PSR_ABT32_MODE, 632 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 633 set_stackptr(PSR_UND32_MODE, 634 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 635 #ifdef PMAP_DEBUG 636 if (pmap_debug_level >= 0) 637 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 638 kernelstack.pv_pa); 639 #endif /* PMAP_DEBUG */ 640 641 /* 642 * Well we should set a data abort handler. 643 * Once things get going this will change as we will need a proper 644 * handler. Until then we will use a handler that just panics but 645 * tells us why. 646 * Initialisation of the vectors will just panic on a data abort. 647 * This just fills in a slighly better one. 648 */ 649 printf("vectors "); 650 data_abort_handler_address = (u_int)data_abort_handler; 651 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 652 undefined_handler_address = (u_int)undefinedinstruction_bounce; 653 printf("%08x %08x %08x\n", data_abort_handler_address, 654 prefetch_abort_handler_address, undefined_handler_address); 655 656 /* Initialise the undefined instruction handlers */ 657 printf("undefined "); 658 undefined_init(); 659 660 /* Set the page table address. */ 661 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 662 setttb(kernel_l1pt.pv_pa); 663 cpu_tlb_flushID(); 664 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 665 666 /* 667 * Moved from cpu_startup() as data_abort_handler() references 668 * this during uvm init 669 */ 670 proc0paddr = (struct user *)kernelstack.pv_va; 671 lwp0.l_addr = proc0paddr; 672 673 #ifdef BOOT_DUMP 674 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 675 dumppages((char *)0xb0100000, 64); /* XXX */ 676 #endif 677 /* Enable MMU, I-cache, D-cache, write buffer. */ 678 cpufunc_control(0x337f, 0x107d); 679 680 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 681 682 consinit(); 683 684 #ifdef VERBOSE_INIT_ARM 685 printf("freemempos=%08lx\n", freemempos); 686 printf("MMU enabled. control=%08x\n", cpu_get_control()); 687 #endif 688 689 /* Load memory into UVM. */ 690 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 691 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 692 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 693 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 694 695 if (start < physical_freestart) 696 start = physical_freestart; 697 if (end > physical_freeend) 698 end = physical_freeend; 699 700 uvm_page_physload(atop(start), atop(end), 701 atop(start), atop(end), VM_FREELIST_DEFAULT); 702 } 703 704 /* Boot strap pmap telling it where the kernel page table is */ 705 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 706 KERNEL_VM_BASE + KERNEL_VM_SIZE); 707 708 if (cputype == CPU_ID_SA110) 709 rpc_sa110_cc_setup(); 710 711 #ifdef IPKDB 712 /* Initialise ipkdb */ 713 ipkdb_init(); 714 if (boothowto & RB_KDB) 715 ipkdb_connect(0); 716 #endif /* NIPKDB */ 717 718 #ifdef BOOT_DUMP 719 dumppages((char *)kernel_l1pt.pv_va, 16); 720 dumppages((char *)PTE_BASE, 16); 721 #endif 722 723 #ifdef DDB 724 db_machine_init(); 725 #endif 726 #if NKSYMS || defined(DDB) || defined(LKM) 727 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 728 #endif 729 730 printf("kernsize=0x%x", kerneldatasize); 731 printf(" (including 0x%x symbols)\n", symbolsize); 732 733 #ifdef DDB 734 if (boothowto & RB_KDB) 735 Debugger(); 736 #endif /* DDB */ 737 738 if (bootinfo->magic == BOOTINFO_MAGIC) { 739 platid.dw.dw0 = bootinfo->platid_cpu; 740 platid.dw.dw1 = bootinfo->platid_machine; 741 } 742 743 /* We return the new stack pointer address */ 744 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 745 } 746 747 void 748 consinit(void) 749 { 750 static int consinit_called = 0; 751 752 if (consinit_called != 0) 753 return; 754 755 consinit_called = 1; 756 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 757 cninit(); 758 else { 759 /* 760 * Nothing to do here. Console initialization is done at 761 * autoconf device attach time. 762 */ 763 } 764 } 765 766 #ifdef DEBUG_BEFOREMMU 767 cons_decl(sacom); 768 void 769 fakecninit() 770 { 771 static struct consdev fakecntab = cons_init(sacom); 772 cn_tab = &fakecntab; 773 774 (*cn_tab->cn_init)(0); 775 cn_tab->cn_pri = CN_REMOTE; 776 } 777 #endif 778 779 780 /* 781 * For optimal cache cleaning we need two 16K banks of 782 * virtual address space that NOTHING else will access 783 * and then we alternate the cache cleaning between the 784 * two banks. 785 * The cache cleaning code requires requires 2 banks aligned 786 * on total size boundry so the banks can be alternated by 787 * eorring the size bit (assumes the bank size is a power of 2) 788 */ 789 void 790 rpc_sa110_cc_setup(void) 791 { 792 int loop; 793 paddr_t kaddr; 794 pt_entry_t *pte; 795 796 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 797 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 798 pte = vtopte(sa1_cc_base + loop); 799 *pte = L2_S_PROTO | kaddr | 800 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 801 PTE_SYNC(pte); 802 } 803 sa1_cache_clean_addr = sa1_cc_base; 804 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 805 } 806 807 #ifdef BOOT_DUMP 808 void dumppages(char *start, int nbytes) 809 { 810 char *p = start; 811 char *p1; 812 int i; 813 814 for(i = nbytes; i > 0; i -= 16, p += 16) { 815 for(p1 = p + 15; p != p1; p1--) { 816 if (*p1) 817 break; 818 } 819 if (! *p1) 820 continue; 821 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 822 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 823 (unsigned int)p, 824 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 825 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 826 } 827 } 828 #endif 829 830 /* End of machdep.c */ 831