1 /* $NetBSD: hpc_machdep.c,v 1.86 2008/06/13 13:24:10 rafal 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 38 /* 39 * Machine dependent functions for kernel setup. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: hpc_machdep.c,v 1.86 2008/06/13 13:24:10 rafal Exp $"); 44 45 #include "opt_ddb.h" 46 #include "opt_pmap_debug.h" 47 #include "fs_nfs.h" 48 #include "ksyms.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/reboot.h> 54 #include <sys/proc.h> 55 #include <sys/msgbuf.h> 56 #include <sys/exec.h> 57 #include <sys/ksyms.h> 58 #include <sys/boot_flag.h> 59 #include <sys/conf.h> /* XXX for consinit related hacks */ 60 61 #if NKSYMS || defined(DDB) || defined(LKM) 62 #include <machine/db_machdep.h> 63 #include <ddb/db_sym.h> 64 #include <ddb/db_extern.h> 65 #ifndef DB_ELFSIZE 66 #error Must define DB_ELFSIZE! 67 #endif 68 #define ELFSIZE DB_ELFSIZE 69 #include <sys/exec_elf.h> 70 #endif 71 72 #include <uvm/uvm.h> 73 74 #include <arm/sa11x0/sa11x0_reg.h> 75 #include <arm/cpuconf.h> 76 #include <arm/undefined.h> 77 78 #include <machine/bootconfig.h> 79 #include <machine/bootinfo.h> 80 #include <machine/cpu.h> 81 #include <machine/frame.h> 82 #include <machine/intr.h> 83 #include <machine/io.h> 84 #include <machine/platid.h> 85 #include <machine/rtc.h> 86 #include <machine/signal.h> 87 88 #include <dev/cons.h> 89 #include <dev/hpc/apm/apmvar.h> 90 #include <dev/hpc/bicons.h> 91 92 #ifdef NFS 93 #include <sys/mount.h> 94 #include <nfs/rpcv2.h> 95 #include <nfs/nfsproto.h> 96 #include <nfs/nfs.h> 97 #include <nfs/nfsmount.h> 98 #endif /* NFS */ 99 100 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 101 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 102 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00C00000) 103 #define KERNEL_VM_SIZE 0x05000000 104 105 /* 106 * Address to call from cpu_reset() to reset the machine. 107 * This is machine architecture dependent as it varies depending 108 * on where the ROM appears when you turn the MMU off. 109 */ 110 u_int cpu_reset_address = 0; 111 112 /* Define various stack sizes in pages */ 113 #define IRQ_STACK_SIZE 1 114 #define ABT_STACK_SIZE 1 115 #define UND_STACK_SIZE 1 116 117 BootConfig bootconfig; /* Boot config storage */ 118 struct bootinfo *bootinfo, bootinfo_storage; 119 static char booted_kernel_storage[80]; 120 char *booted_kernel = booted_kernel_storage; 121 122 paddr_t physical_start; 123 paddr_t physical_freestart; 124 paddr_t physical_freeend; 125 paddr_t physical_end; 126 int physmem = 0; 127 128 #ifndef PMAP_STATIC_L1S 129 int max_processes = 64; /* Default number */ 130 #endif /* !PMAP_STATIC_L1S */ 131 132 133 /* Physical and virtual addresses for some global pages */ 134 pv_addr_t irqstack; 135 pv_addr_t undstack; 136 pv_addr_t abtstack; 137 pv_addr_t kernelstack; 138 139 char *boot_args = NULL; 140 char boot_file[16]; 141 142 vaddr_t msgbufphys; 143 144 extern u_int data_abort_handler_address; 145 extern u_int prefetch_abort_handler_address; 146 extern u_int undefined_handler_address; 147 extern int end; 148 149 #ifdef PMAP_DEBUG 150 extern int pmap_debug_level; 151 #endif /* PMAP_DEBUG */ 152 153 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 154 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 155 #define KERNEL_PT_IO 2 /* Page table for mapping IO */ 156 #define KERNEL_PT_KERNEL 3 /* Page table for mapping kernel */ 157 #define KERNEL_PT_KERNEL_NUM 4 158 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 159 /* Page tables for mapping kernel VM */ 160 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 161 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 162 163 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 164 165 struct user *proc0paddr; 166 167 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 168 extern unsigned int sa1_cache_clean_addr; 169 extern unsigned int sa1_cache_clean_size; 170 static vaddr_t sa1_cc_base; 171 172 /* Mode dependent sleep function holder */ 173 void (*__sleep_func)(void *); 174 void *__sleep_ctx; 175 176 /* Non-buffered non-cacheable memory needed to enter idle mode */ 177 extern vaddr_t sa11x0_idle_mem; 178 179 /* Prototypes */ 180 void data_abort_handler(trapframe_t *); 181 void prefetch_abort_handler(trapframe_t *); 182 void undefinedinstruction_bounce(trapframe_t *); 183 void dumpsys(void); 184 u_int cpu_get_control(void); 185 186 u_int initarm(int, char **, struct bootinfo *); 187 188 #ifdef DEBUG_BEFOREMMU 189 static void fakecninit(void); 190 #endif 191 192 #ifdef BOOT_DUMP 193 static void dumppages(char *, int); 194 #endif 195 196 /* 197 * Reboots the system. 198 * 199 * Deal with any syncing, unmounting, dumping and shutdown hooks, 200 * then reset the CPU. 201 */ 202 void 203 cpu_reboot(int howto, char *bootstr) 204 { 205 /* 206 * If we are still cold then hit the air brakes 207 * and crash to earth fast. 208 */ 209 if (cold) { 210 doshutdownhooks(); 211 printf("Halted while still in the ICE age.\n"); 212 printf("The operating system has halted.\n"); 213 printf("Please press any key to reboot.\n\n"); 214 cngetc(); 215 printf("rebooting...\n"); 216 cpu_reset(); 217 /* NOTREACHED */ 218 } 219 220 /* Reset the sleep function. */ 221 __sleep_func = NULL; 222 __sleep_ctx = NULL; 223 224 /* Disable console buffering. */ 225 cnpollc(1); 226 227 /* 228 * If RB_NOSYNC was not specified sync the discs. 229 * Note: Unless cold is set to 1 here, syslogd will die during 230 * the unmount. It looks like syslogd is getting woken up only 231 * to find that it cannot page part of the binary in as the 232 * file system has been unmounted. 233 */ 234 if (!(howto & RB_NOSYNC)) 235 bootsync(); 236 237 /* Say NO to interrupts. */ 238 (void)splhigh(); 239 240 /* Do a dump if requested. */ 241 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 242 dumpsys(); 243 244 /* Run any shutdown hooks. */ 245 doshutdownhooks(); 246 247 /* Make sure IRQs are disabled. */ 248 IRQdisable; 249 250 if (howto & RB_HALT) { 251 printf("The operating system has halted.\n"); 252 printf("Please press any key to reboot.\n\n"); 253 cngetc(); 254 } 255 256 printf("rebooting...\n"); 257 cpu_reset(); 258 /* NOTREACHED */ 259 } 260 261 /* Number of DRAM pages which are installed */ 262 /* Units are 4K pages, so 8192 is 32 MB of memory */ 263 #ifndef DRAM_PAGES 264 #define DRAM_PAGES 8192 265 #endif 266 267 /* 268 * Static device mappings. These peripheral registers are mapped at 269 * fixed virtual addresses very early in initarm() so that we can use 270 * them while booting the kernel and stay at the same address 271 * throughout whole kernel's life time. 272 */ 273 static const struct pmap_devmap sa11x0_devmap[] = { 274 /* Physical/virtual address for UART #3. */ 275 { 276 SACOM3_VBASE, 277 SACOM3_BASE, 278 0x24, 279 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE 280 }, 281 { 0, 0, 0, 0, 0 } 282 }; 283 284 /* 285 * Initial entry point on startup. This gets called before main() is 286 * entered. 287 * It should be responsible for setting up everything that must be 288 * in place when main is called. 289 * This includes: 290 * Taking a copy of the boot configuration structure. 291 * Initializing the physical console so characters can be printed. 292 * Setting up page tables for the kernel. 293 */ 294 u_int 295 initarm(int argc, char **argv, struct bootinfo *bi) 296 { 297 u_int kerneldatasize, symbolsize; 298 u_int l1pagetable; 299 vaddr_t freemempos; 300 vsize_t pt_size; 301 int loop, i; 302 #if NKSYMS || defined(DDB) || defined(LKM) 303 Elf_Shdr *sh; 304 #endif 305 306 __sleep_func = NULL; 307 __sleep_ctx = NULL; 308 309 /* 310 * Heads up ... Setup the CPU / MMU / TLB functions. 311 */ 312 set_cpufuncs(); 313 IRQdisable; 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 = DRAM_PAGES; 330 bootconfig.dramblocks = 1; 331 kerneldatasize = (uint32_t)&end - (uint32_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 boothowto = 0; 352 boot_file[0] = '\0'; 353 strncpy(booted_kernel_storage, argv[0], sizeof(booted_kernel_storage)); 354 for (i = 1; i < argc; i++) { 355 char *cp = argv[i]; 356 357 switch (*cp) { 358 case 'b': 359 /* boot device: -b=sd0 etc. */ 360 cp = cp + 2; 361 #ifdef NFS 362 if (strcmp(cp, "nfs") == 0) 363 mountroot = nfs_mountroot; 364 else 365 strncpy(boot_file, cp, sizeof(boot_file)); 366 #else /* !NFS */ 367 strncpy(boot_file, cp, sizeof(boot_file)); 368 #endif /* !NFS */ 369 break; 370 default: 371 BOOT_FLAG(*cp, boothowto); 372 break; 373 } 374 } 375 376 /* copy bootinfo into known kernel space */ 377 bootinfo_storage = *bi; 378 bootinfo = &bootinfo_storage; 379 380 #ifdef BOOTINFO_FB_WIDTH 381 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 382 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 383 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 384 bootinfo->fb_type = BOOTINFO_FB_TYPE; 385 #endif 386 387 /* 388 * hpcboot has loaded me with MMU disabled. 389 * So create kernel page tables and enable MMU. 390 */ 391 392 /* 393 * Set up the variables that define the availability of physcial 394 * memory. 395 */ 396 physical_start = bootconfig.dram[0].address; 397 physical_freestart = physical_start 398 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 399 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 400 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 401 physical_freeend = physical_end; 402 403 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 404 physmem += bootconfig.dram[loop].pages; 405 406 /* XXX handle UMA framebuffer memory */ 407 408 /* Use the first 256kB to allocate things */ 409 freemempos = KERNEL_BASE; 410 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 411 412 /* 413 * Right. We have the bottom meg of memory mapped to 0x00000000 414 * so was can get at it. The kernel will occupy the start of it. 415 * After the kernel/args we allocate some of the fixed page tables 416 * we need to get the system going. 417 * We allocate one page directory and NUM_KERNEL_PTS page tables 418 * and store the physical addresses in the kernel_pt_table array. 419 * Must remember that neither the page L1 or L2 page tables are the 420 * same size as a page ! 421 * 422 * Ok, the next bit of physical allocate may look complex but it is 423 * simple really. I have done it like this so that no memory gets 424 * wasted during the allocate of various pages and tables that are 425 * all different sizes. 426 * The start address will be page aligned. 427 * We allocate the kernel page directory on the first free 16KB 428 * boundary we find. 429 * We allocate the kernel page tables on the first 1KB boundary we 430 * find. We allocate at least 9 PT's (12 currently). This means 431 * that in the process we KNOW that we will encounter at least one 432 * 16KB boundary. 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 construction 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 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 529 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 530 &kernel_pt_table[KERNEL_PT_IO]); 531 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 532 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 533 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 534 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 535 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 536 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 537 538 /* update the top of the kernel VM */ 539 pmap_curmaxkvaddr = 540 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 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 the statically mapped devices. */ 597 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 598 599 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 600 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 601 /* 602 * Now we have the real page tables in place so we can switch to them. 603 * Once this is done we will be running with the REAL kernel page 604 * tables. 605 */ 606 607 printf("done.\n"); 608 609 /* 610 * Pages were allocated during the secondary bootstrap for the 611 * stacks for different CPU modes. 612 * We must now set the r13 registers in the different CPU modes to 613 * point to these stacks. 614 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 615 * of the stack memory. 616 */ 617 printf("init subsystems: stacks "); 618 619 set_stackptr(PSR_IRQ32_MODE, 620 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 621 set_stackptr(PSR_ABT32_MODE, 622 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 623 set_stackptr(PSR_UND32_MODE, 624 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 625 #ifdef PMAP_DEBUG 626 if (pmap_debug_level >= 0) 627 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 628 kernelstack.pv_pa); 629 #endif /* PMAP_DEBUG */ 630 631 /* 632 * Well we should set a data abort handler. 633 * Once things get going this will change as we will need a proper 634 * handler. Until then we will use a handler that just panics but 635 * tells us why. 636 * Initialization of the vectors will just panic on a data abort. 637 * This just fills in a slightly better one. 638 */ 639 printf("vectors "); 640 data_abort_handler_address = (u_int)data_abort_handler; 641 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 642 undefined_handler_address = (u_int)undefinedinstruction_bounce; 643 printf("%08x %08x %08x\n", data_abort_handler_address, 644 prefetch_abort_handler_address, undefined_handler_address); 645 646 /* Initialize the undefined instruction handlers */ 647 printf("undefined "); 648 undefined_init(); 649 650 /* Set the page table address. */ 651 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 652 setttb(kernel_l1pt.pv_pa); 653 cpu_tlb_flushID(); 654 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 655 656 /* 657 * Moved from cpu_startup() as data_abort_handler() references 658 * this during uvm init. 659 */ 660 proc0paddr = (struct user *)kernelstack.pv_va; 661 lwp0.l_addr = proc0paddr; 662 663 #ifdef BOOT_DUMP 664 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 665 dumppages((char *)0xb0100000, 64); /* XXX */ 666 #endif 667 /* Enable MMU, I-cache, D-cache, write buffer. */ 668 cpufunc_control(0x337f, 0x107d); 669 670 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 671 672 consinit(); 673 674 #ifdef VERBOSE_INIT_ARM 675 printf("freemempos=%08lx\n", freemempos); 676 printf("MMU enabled. control=%08x\n", cpu_get_control()); 677 #endif 678 679 /* Load memory into UVM. */ 680 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 681 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 682 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 683 paddr_t dblk_end = dblk_start 684 + (bootconfig.dram[loop].pages * PAGE_SIZE); 685 686 if (dblk_start < physical_freestart) 687 dblk_start = physical_freestart; 688 if (dblk_end > physical_freeend) 689 dblk_end = physical_freeend; 690 691 uvm_page_physload(atop(dblk_start), atop(dblk_end), 692 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 693 } 694 695 /* Boot strap pmap telling it where the kernel page table is */ 696 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 697 698 #ifdef BOOT_DUMP 699 dumppages((char *)kernel_l1pt.pv_va, 16); 700 #endif 701 702 #ifdef DDB 703 db_machine_init(); 704 #endif 705 #if NKSYMS || defined(DDB) || defined(LKM) 706 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 707 #endif 708 709 printf("kernsize=0x%x", kerneldatasize); 710 printf(" (including 0x%x symbols)\n", symbolsize); 711 712 #ifdef DDB 713 if (boothowto & RB_KDB) 714 Debugger(); 715 #endif /* DDB */ 716 717 if (bootinfo->magic == BOOTINFO_MAGIC) { 718 platid.dw.dw0 = bootinfo->platid_cpu; 719 platid.dw.dw1 = bootinfo->platid_machine; 720 } 721 722 /* We return the new stack pointer address */ 723 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 724 } 725 726 void 727 machine_sleep(void) 728 { 729 730 if (__sleep_func != NULL) 731 __sleep_func(__sleep_ctx); 732 } 733 734 void 735 machine_standby(void) 736 { 737 738 } 739 740 void 741 consinit(void) 742 { 743 static int consinit_called = 0; 744 745 if (consinit_called != 0) 746 return; 747 748 consinit_called = 1; 749 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 750 cninit(); 751 else { 752 /* 753 * Nothing to do here. Console initialization is done at 754 * autoconf device attach time. 755 */ 756 } 757 } 758 759 #ifdef DEBUG_BEFOREMMU 760 cons_decl(sacom); 761 762 static void 763 fakecninit(void) 764 { 765 static struct consdev fakecntab = cons_init(sacom); 766 cn_tab = &fakecntab; 767 768 (*cn_tab->cn_init)(0); 769 cn_tab->cn_pri = CN_REMOTE; 770 } 771 #endif 772 773 #ifdef BOOT_DUMP 774 static void 775 dumppages(char *start, int nbytes) 776 { 777 char *p = start; 778 char *p1; 779 int i; 780 781 for (i = nbytes; i > 0; i -= 16, p += 16) { 782 for (p1 = p + 15; p != p1; p1--) { 783 if (*p1) 784 break; 785 } 786 if (!*p1) 787 continue; 788 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 789 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 790 (unsigned int)p, 791 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 792 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 793 } 794 } 795 #endif 796