1 /* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc 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 1.70 2003/09/16 08:18:22 agc 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 int db_trapper(u_int, u_int, trapframe_t *, int); 216 extern void dump_spl_masks __P((void)); 217 extern void dumpsys __P((void)); 218 219 /* 220 * void cpu_reboot(int howto, char *bootstr) 221 * 222 * Reboots the system 223 * 224 * Deal with any syncing, unmounting, dumping and shutdown hooks, 225 * then reset the CPU. 226 */ 227 228 void 229 cpu_reboot(howto, bootstr) 230 int howto; 231 char *bootstr; 232 { 233 /* 234 * If we are still cold then hit the air brakes 235 * and crash to earth fast 236 */ 237 if (cold) { 238 doshutdownhooks(); 239 printf("Halted while still in the ICE age.\n"); 240 printf("The operating system has halted.\n"); 241 printf("Please press any key to reboot.\n\n"); 242 cngetc(); 243 printf("rebooting...\n"); 244 cpu_reset(); 245 /*NOTREACHED*/ 246 } 247 248 /* Disable console buffering */ 249 cnpollc(1); 250 251 /* 252 * If RB_NOSYNC was not specified sync the discs. 253 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 254 * It looks like syslogd is getting woken up only to find that it cannot 255 * page part of the binary in as the filesystem has been unmounted. 256 */ 257 if (!(howto & RB_NOSYNC)) 258 bootsync(); 259 260 /* Say NO to interrupts */ 261 splhigh(); 262 263 /* Do a dump if requested. */ 264 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 265 dumpsys(); 266 267 268 /* Run any shutdown hooks */ 269 doshutdownhooks(); 270 271 /* Make sure IRQ's are disabled */ 272 IRQdisable; 273 274 if (howto & RB_HALT) { 275 printf("The operating system has halted.\n"); 276 printf("Please press any key to reboot.\n\n"); 277 cngetc(); 278 } 279 280 printf("rebooting...\n"); 281 cpu_reset(); 282 /*NOTREACHED*/ 283 } 284 285 /* Number of DRAM pages which are installed */ 286 /* Units are 4K pages, so 8192 is 32 MB of memory */ 287 #ifndef DRAM_PAGES 288 #define DRAM_PAGES 8192 289 #endif 290 291 /* 292 * 293 * Initial entry point on startup. This gets called before main() is 294 * entered. 295 * It should be responsible for setting up everything that must be 296 * in place when main is called. 297 * This includes 298 * Taking a copy of the boot configuration structure. 299 * Initialising the physical console so characters can be printed. 300 * Setting up page tables for the kernel 301 */ 302 303 u_int 304 initarm(argc, argv, bi) 305 int argc; 306 char **argv; 307 struct bootinfo *bi; 308 { 309 int loop; 310 u_int kerneldatasize, symbolsize; 311 u_int l1pagetable; 312 vaddr_t freemempos; 313 pv_addr_t kernel_l1pt; 314 vsize_t pt_size; 315 #if NKSYMS || defined(DDB) || defined(LKM) 316 Elf_Shdr *sh; 317 #endif 318 319 /* 320 * Heads up ... Setup the CPU / MMU / TLB functions 321 */ 322 set_cpufuncs(); 323 324 #ifdef DEBUG_BEFOREMMU 325 /* 326 * At this point, we cannot call real consinit(). 327 * Just call a faked up version of consinit(), which does the thing 328 * with MMU disabled. 329 */ 330 fakecninit(); 331 #endif 332 333 /* 334 * XXX for now, overwrite bootconfig to hardcoded values. 335 * XXX kill bootconfig and directly call uvm_physload 336 */ 337 bootconfig.dram[0].address = 0xc0000000; 338 bootconfig.dram[0].pages = DRAM_PAGES; 339 bootconfig.dramblocks = 1; 340 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 341 342 symbolsize = 0; 343 #if NKSYMS || defined(DDB) || defined(LKM) 344 if (! memcmp(&end, "\177ELF", 4)) { 345 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 346 loop = ((Elf_Ehdr *)&end)->e_shnum; 347 for(; loop; loop--, sh++) 348 if (sh->sh_offset > 0 && 349 (sh->sh_offset + sh->sh_size) > symbolsize) 350 symbolsize = sh->sh_offset + sh->sh_size; 351 } 352 #endif 353 354 printf("kernsize=0x%x\n", kerneldatasize); 355 kerneldatasize += symbolsize; 356 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 357 PAGE_SIZE * 8; 358 359 /* parse kernel args */ 360 boot_file[0] = '\0'; 361 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 362 for(argc--, argv++; argc; argc--, argv++) 363 switch(**argv) { 364 case 'a': 365 boothowto |= RB_ASKNAME; 366 break; 367 case 's': 368 boothowto |= RB_SINGLE; 369 break; 370 case 'b': 371 /* boot device: -b=sd0 etc. */ 372 #ifdef NFS 373 if (strcmp(*argv + 2, "nfs") == 0) 374 mountroot = nfs_mountroot; 375 else 376 strncpy(boot_file, *argv + 2, 377 sizeof(boot_file)); 378 #else /* NFS */ 379 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 380 #endif /* NFS */ 381 break; 382 default: 383 break; 384 } 385 386 /* copy bootinfo into known kernel space */ 387 bootinfo_storage = *bi; 388 bootinfo = &bootinfo_storage; 389 390 #ifdef BOOTINFO_FB_WIDTH 391 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 392 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 393 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 394 bootinfo->fb_type = BOOTINFO_FB_TYPE; 395 #endif 396 397 /* 398 * hpcboot has loaded me with MMU disabled. 399 * So create kernel page tables and enable MMU 400 */ 401 402 /* 403 * Set up the variables that define the availablilty of physcial 404 * memory 405 */ 406 physical_start = bootconfig.dram[0].address; 407 physical_freestart = physical_start 408 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 409 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 410 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 411 physical_freeend = physical_end; 412 413 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 414 physmem += bootconfig.dram[loop].pages; 415 416 /* XXX handle UMA framebuffer memory */ 417 418 /* Use the first 256kB to allocate things */ 419 freemempos = KERNEL_BASE; 420 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 421 422 /* 423 * Right We have the bottom meg of memory mapped to 0x00000000 424 * so was can get at it. The kernel will ocupy the start of it. 425 * After the kernel/args we allocate some of the fixed page tables 426 * we need to get the system going. 427 * We allocate one page directory and 8 page tables and store the 428 * physical addresses in the kernel_pt_table array. 429 * Must remember that neither the page L1 or L2 page tables are the 430 * same size as a page ! 431 * 432 * Ok the next bit of physical allocate may look complex but it is 433 * simple really. I have done it like this so that no memory gets 434 * wasted during the allocate of various pages and tables that are 435 * all different sizes. 436 * The start address will be page aligned. 437 * We allocate the kernel page directory on the first free 16KB 438 * boundry we find. 439 * We allocate the kernel page tables on the first 1KB boundry we find. 440 * We allocate 9 PT's. This means that in the process we 441 * KNOW that we will encounter at least 1 16KB boundry. 442 * 443 * Eventually if the top end of the memory gets used for process L1 444 * page tables the kernel L1 page table may be moved up there. 445 */ 446 447 #ifdef VERBOSE_INIT_ARM 448 printf("Allocating page tables\n"); 449 #endif 450 451 /* Define a macro to simplify memory allocation */ 452 #define valloc_pages(var, np) \ 453 (var).pv_pa = (var).pv_va = freemempos; \ 454 freemempos += (np) * PAGE_SIZE; 455 #define alloc_pages(var, np) \ 456 (var) = freemempos; \ 457 freemempos += (np) * PAGE_SIZE; 458 459 460 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 461 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 462 alloc_pages(kernel_pt_table[loop].pv_pa, 463 L2_TABLE_SIZE / PAGE_SIZE); 464 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 465 } 466 467 /* 468 * Allocate a page for the system page mapped to V0x00000000 469 * This page will just contain the system vectors and can be 470 * shared by all processes. 471 */ 472 valloc_pages(systempage, 1); 473 474 pt_size = round_page(freemempos) - KERNEL_BASE; 475 476 /* Allocate stacks for all modes */ 477 valloc_pages(irqstack, IRQ_STACK_SIZE); 478 valloc_pages(abtstack, ABT_STACK_SIZE); 479 valloc_pages(undstack, UND_STACK_SIZE); 480 valloc_pages(kernelstack, UPAGES); 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 484 irqstack.pv_va); 485 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 486 abtstack.pv_va); 487 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 488 undstack.pv_va); 489 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 490 kernelstack.pv_va); 491 #endif 492 493 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 494 495 /* 496 * XXX Actually, we only need virtual space and don't need 497 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 498 */ 499 /* 500 * XXX totally stuffed hack to work round problems introduced 501 * in recent versions of the pmap code. Due to the calls used there 502 * we cannot allocate virtual memory during bootstrap. 503 */ 504 for(;;) { 505 alloc_pages(sa1_cc_base, 1); 506 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 507 break; 508 } 509 { 510 vaddr_t dummy; 511 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 512 } 513 sa1_cache_clean_addr = sa1_cc_base; 514 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 515 516 alloc_pages(sa11x0_idle_mem, 1); 517 518 /* 519 * Ok we have allocated physical pages for the primary kernel 520 * page tables 521 */ 522 523 #ifdef VERBOSE_INIT_ARM 524 printf("Creating L1 page table\n"); 525 #endif 526 527 /* 528 * Now we start consturction of the L1 page table 529 * We start by mapping the L2 page tables into the L1. 530 * This means that we can replace L1 mappings later on if necessary 531 */ 532 l1pagetable = kernel_l1pt.pv_pa; 533 534 /* Map the L2 pages tables in the L1 page table */ 535 pmap_link_l2pt(l1pagetable, 0x00000000, 536 &kernel_pt_table[KERNEL_PT_SYS]); 537 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 538 &kernel_pt_table[KERNEL_PT_KERNEL]); 539 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 540 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 541 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 542 543 /* update the top of the kernel VM */ 544 pmap_curmaxkvaddr = 545 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 546 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 547 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 548 &kernel_pt_table[KERNEL_PT_IO]); 549 550 551 #ifdef VERBOSE_INIT_ARM 552 printf("Mapping kernel\n"); 553 #endif 554 555 /* Now we fill in the L2 pagetable for the kernel code/data */ 556 557 /* 558 * XXX there is no ELF header to find RO region. 559 * XXX What should we do? 560 */ 561 #if 0 562 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 563 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 564 physical_start, kernexec->a_text, 565 VM_PROT_READ, PTE_CACHE); 566 logical += pmap_map_chunk(l1pagetable, 567 KERNEL_TEXT_BASE + logical, physical_start + logical, 568 kerneldatasize - kernexec->a_text, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 } else 571 #endif 572 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 573 KERNEL_TEXT_BASE, kerneldatasize, 574 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 #ifdef VERBOSE_INIT_ARM 577 printf("Constructing L2 page tables\n"); 578 #endif 579 580 /* Map the stack pages */ 581 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 582 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 583 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 584 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 586 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 587 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 588 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 590 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 591 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 592 593 /* Map page tables */ 594 pmap_map_chunk(l1pagetable, KERNEL_BASE, KERNEL_BASE, pt_size, 595 VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 596 597 /* Map a page for entering idle mode */ 598 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 599 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 600 601 /* Map the vector page. */ 602 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 603 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 605 /* Map any I/O modules here, as we don't have real bus_space_map() */ 606 printf("mapping IO..."); 607 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 608 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 609 610 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 611 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 612 /* 613 * Now we have the real page tables in place so we can switch to them. 614 * Once this is done we will be running with the REAL kernel page 615 * tables. 616 */ 617 618 printf("done.\n"); 619 620 /* 621 * Pages were allocated during the secondary bootstrap for the 622 * stacks for different CPU modes. 623 * We must now set the r13 registers in the different CPU modes to 624 * point to these stacks. 625 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 626 * of the stack memory. 627 */ 628 printf("init subsystems: stacks "); 629 630 set_stackptr(PSR_IRQ32_MODE, 631 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 632 set_stackptr(PSR_ABT32_MODE, 633 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 634 set_stackptr(PSR_UND32_MODE, 635 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 636 #ifdef PMAP_DEBUG 637 if (pmap_debug_level >= 0) 638 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 639 kernelstack.pv_pa); 640 #endif /* PMAP_DEBUG */ 641 642 /* 643 * Well we should set a data abort handler. 644 * Once things get going this will change as we will need a proper 645 * handler. Until then we will use a handler that just panics but 646 * tells us why. 647 * Initialisation of the vectors will just panic on a data abort. 648 * This just fills in a slighly better one. 649 */ 650 printf("vectors "); 651 data_abort_handler_address = (u_int)data_abort_handler; 652 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 653 undefined_handler_address = (u_int)undefinedinstruction_bounce; 654 printf("%08x %08x %08x\n", data_abort_handler_address, 655 prefetch_abort_handler_address, undefined_handler_address); 656 657 /* Initialise the undefined instruction handlers */ 658 printf("undefined "); 659 undefined_init(); 660 661 /* Set the page table address. */ 662 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 663 setttb(kernel_l1pt.pv_pa); 664 cpu_tlb_flushID(); 665 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 666 667 /* 668 * Moved from cpu_startup() as data_abort_handler() references 669 * this during uvm init 670 */ 671 proc0paddr = (struct user *)kernelstack.pv_va; 672 lwp0.l_addr = proc0paddr; 673 674 #ifdef BOOT_DUMP 675 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 676 dumppages((char *)0xb0100000, 64); /* XXX */ 677 #endif 678 /* Enable MMU, I-cache, D-cache, write buffer. */ 679 cpufunc_control(0x337f, 0x107d); 680 681 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 682 683 consinit(); 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("freemempos=%08lx\n", freemempos); 687 printf("MMU enabled. control=%08x\n", cpu_get_control()); 688 #endif 689 690 /* Load memory into UVM. */ 691 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 692 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 693 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 694 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE); 695 696 if (start < physical_freestart) 697 start = physical_freestart; 698 if (end > physical_freeend) 699 end = physical_freeend; 700 701 uvm_page_physload(atop(start), atop(end), 702 atop(start), atop(end), VM_FREELIST_DEFAULT); 703 } 704 705 /* Boot strap pmap telling it where the kernel page table is */ 706 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 707 KERNEL_VM_BASE + KERNEL_VM_SIZE); 708 709 if (cputype == CPU_ID_SA110) 710 rpc_sa110_cc_setup(); 711 712 #ifdef IPKDB 713 /* Initialise ipkdb */ 714 ipkdb_init(); 715 if (boothowto & RB_KDB) 716 ipkdb_connect(0); 717 #endif /* NIPKDB */ 718 719 #ifdef BOOT_DUMP 720 dumppages((char *)kernel_l1pt.pv_va, 16); 721 dumppages((char *)PTE_BASE, 16); 722 #endif 723 724 #ifdef DDB 725 db_machine_init(); 726 #endif 727 #if NKSYMS || defined(DDB) || defined(LKM) 728 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 729 #endif 730 731 printf("kernsize=0x%x", kerneldatasize); 732 printf(" (including 0x%x symbols)\n", symbolsize); 733 734 #ifdef DDB 735 if (boothowto & RB_KDB) 736 Debugger(); 737 #endif /* DDB */ 738 739 if (bootinfo->magic == BOOTINFO_MAGIC) { 740 platid.dw.dw0 = bootinfo->platid_cpu; 741 platid.dw.dw1 = bootinfo->platid_machine; 742 } 743 744 /* We return the new stack pointer address */ 745 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 746 } 747 748 void 749 consinit(void) 750 { 751 static int consinit_called = 0; 752 753 if (consinit_called != 0) 754 return; 755 756 consinit_called = 1; 757 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 758 cninit(); 759 else { 760 /* 761 * Nothing to do here. Console initialization is done at 762 * autoconf device attach time. 763 */ 764 } 765 } 766 767 #ifdef DEBUG_BEFOREMMU 768 cons_decl(sacom); 769 void 770 fakecninit() 771 { 772 static struct consdev fakecntab = cons_init(sacom); 773 cn_tab = &fakecntab; 774 775 (*cn_tab->cn_init)(0); 776 cn_tab->cn_pri = CN_REMOTE; 777 } 778 #endif 779 780 781 /* 782 * For optimal cache cleaning we need two 16K banks of 783 * virtual address space that NOTHING else will access 784 * and then we alternate the cache cleaning between the 785 * two banks. 786 * The cache cleaning code requires requires 2 banks aligned 787 * on total size boundry so the banks can be alternated by 788 * eorring the size bit (assumes the bank size is a power of 2) 789 */ 790 void 791 rpc_sa110_cc_setup(void) 792 { 793 int loop; 794 paddr_t kaddr; 795 pt_entry_t *pte; 796 797 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 798 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 799 pte = vtopte(sa1_cc_base + loop); 800 *pte = L2_S_PROTO | kaddr | 801 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 802 PTE_SYNC(pte); 803 } 804 sa1_cache_clean_addr = sa1_cc_base; 805 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 806 } 807 808 #ifdef BOOT_DUMP 809 void dumppages(char *start, int nbytes) 810 { 811 char *p = start; 812 char *p1; 813 int i; 814 815 for(i = nbytes; i > 0; i -= 16, p += 16) { 816 for(p1 = p + 15; p != p1; p1--) { 817 if (*p1) 818 break; 819 } 820 if (! *p1) 821 continue; 822 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 823 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 824 (unsigned int)p, 825 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 826 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 827 } 828 } 829 #endif 830 831 /* End of machdep.c */ 832