1 /* $NetBSD: hpc_machdep.c,v 1.26 2002/01/30 00:40:20 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_cputypes.h" 52 #include "opt_ddb.h" 53 #include "opt_pmap_debug.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 63 #include <dev/cons.h> 64 65 #ifdef DDB 66 #include <machine/db_machdep.h> 67 #include <ddb/db_sym.h> 68 #include <ddb/db_extern.h> 69 #ifndef DB_ELFSIZE 70 #error Must define DB_ELFSIZE! 71 #endif 72 #define ELFSIZE DB_ELFSIZE 73 #include <sys/exec_elf.h> 74 #endif 75 76 #include <uvm/uvm.h> 77 78 #include <machine/signal.h> 79 #include <machine/frame.h> 80 #include <machine/bootconfig.h> 81 #include <machine/cpu.h> 82 #include <machine/io.h> 83 #include <machine/intr.h> 84 #include <arm/arm32/katelib.h> 85 #include <machine/bootinfo.h> 86 #include <arm/undefined.h> 87 #include <machine/rtc.h> 88 #include <hpc/hpc/platid.h> 89 #include <hpcarm/sa11x0/sa11x0_reg.h> 90 91 #include <dev/hpc/bicons.h> 92 93 #include "opt_ipkdb.h" 94 95 /* XXX for consinit related hacks */ 96 #include <sys/conf.h> 97 98 /* 99 * Address to call from cpu_reset() to reset the machine. 100 * This is machine architecture dependant as it varies depending 101 * on where the ROM appears when you turn the MMU off. 102 */ 103 104 u_int cpu_reset_address = 0; 105 106 /* Define various stack sizes in pages */ 107 #define IRQ_STACK_SIZE 1 108 #define ABT_STACK_SIZE 1 109 #ifdef IPKDB 110 #define UND_STACK_SIZE 2 111 #else 112 #define UND_STACK_SIZE 1 113 #endif 114 115 BootConfig bootconfig; /* Boot config storage */ 116 struct bootinfo *bootinfo, bootinfo_storage; 117 static char booted_kernel_storage[80]; 118 char *booted_kernel = booted_kernel_storage; 119 120 paddr_t physical_start; 121 paddr_t physical_freestart; 122 paddr_t physical_freeend; 123 paddr_t physical_end; 124 u_int free_pages; 125 int physmem = 0; 126 127 #ifndef PMAP_STATIC_L1S 128 int max_processes = 64; /* Default number */ 129 #endif /* !PMAP_STATIC_L1S */ 130 131 132 /* Physical and virtual addresses for some global pages */ 133 pv_addr_t systempage; 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 = NULL; 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_KERNEL 2 /* Page table for mapping kernel */ 156 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 157 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 158 #define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2)) 159 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 160 161 pt_entry_t kernel_pt_table[NUM_KERNEL_PTS]; 162 163 struct user *proc0paddr; 164 165 #ifdef CPU_SA110 166 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 167 extern unsigned int sa110_cache_clean_addr; 168 extern unsigned int sa110_cache_clean_size; 169 static vaddr_t sa110_cc_base; 170 #endif /* CPU_SA110 */ 171 172 /* Non-buffered non-cachable memory needed to enter idle mode */ 173 extern vaddr_t sa11x0_idle_mem; 174 175 /* Prototypes */ 176 177 void physcon_display_base __P((u_int addr)); 178 void consinit __P((void)); 179 180 void map_section __P((vaddr_t pt, vaddr_t va, vaddr_t pa, 181 int cacheable)); 182 void map_pagetable __P((vaddr_t pt, vaddr_t va, vaddr_t pa)); 183 void map_entry __P((vaddr_t pt, vaddr_t va, vaddr_t pa)); 184 void map_entry_nc __P((vaddr_t pt, vaddr_t va, vaddr_t pa)); 185 void map_entry_ro __P((vaddr_t pt, vaddr_t va, vaddr_t pa)); 186 vm_size_t map_chunk __P((vaddr_t pd, vaddr_t pt, vaddr_t va, 187 vaddr_t pa, vm_size_t size, u_int acc, 188 u_int flg)); 189 190 void data_abort_handler __P((trapframe_t *frame)); 191 void prefetch_abort_handler __P((trapframe_t *frame)); 192 void undefinedinstruction_bounce __P((trapframe_t *frame)); 193 194 u_int cpu_get_control __P((void)); 195 196 void rpc_sa110_cc_setup(void); 197 198 #ifdef DEBUG_BEFOREMMU 199 static void fakecninit(); 200 #endif 201 202 #ifdef BOOT_DUMP 203 void dumppages(char *, int); 204 #endif 205 206 extern int db_trapper(); 207 208 extern void dump_spl_masks __P((void)); 209 extern pt_entry_t *pmap_pte __P((pmap_t pmap, vaddr_t va)); 210 211 extern void dumpsys __P((void)); 212 213 /* 214 * void cpu_reboot(int howto, char *bootstr) 215 * 216 * Reboots the system 217 * 218 * Deal with any syncing, unmounting, dumping and shutdown hooks, 219 * then reset the CPU. 220 */ 221 222 void 223 cpu_reboot(howto, bootstr) 224 int howto; 225 char *bootstr; 226 { 227 /* 228 * If we are still cold then hit the air brakes 229 * and crash to earth fast 230 */ 231 if (cold) { 232 doshutdownhooks(); 233 printf("Halted while still in the ICE age.\n"); 234 printf("The operating system has halted.\n"); 235 printf("Please press any key to reboot.\n\n"); 236 cngetc(); 237 printf("rebooting...\n"); 238 cpu_reset(); 239 /*NOTREACHED*/ 240 } 241 242 /* Disable console buffering */ 243 cnpollc(1); 244 245 /* 246 * If RB_NOSYNC was not specified sync the discs. 247 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 248 * It looks like syslogd is getting woken up only to find that it cannot 249 * page part of the binary in as the filesystem has been unmounted. 250 */ 251 if (!(howto & RB_NOSYNC)) 252 bootsync(); 253 254 /* Say NO to interrupts */ 255 splhigh(); 256 257 /* Do a dump if requested. */ 258 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 259 dumpsys(); 260 261 262 /* Run any shutdown hooks */ 263 doshutdownhooks(); 264 265 /* Make sure IRQ's are disabled */ 266 IRQdisable; 267 268 if (howto & RB_HALT) { 269 printf("The operating system has halted.\n"); 270 printf("Please press any key to reboot.\n\n"); 271 cngetc(); 272 } 273 274 printf("rebooting...\n"); 275 cpu_reset(); 276 /*NOTREACHED*/ 277 } 278 279 /* 280 * 281 * Initial entry point on startup. This gets called before main() is 282 * entered. 283 * It should be responsible for setting up everything that must be 284 * in place when main is called. 285 * This includes 286 * Taking a copy of the boot configuration structure. 287 * Initialising the physical console so characters can be printed. 288 * Setting up page tables for the kernel 289 */ 290 291 u_int 292 initarm(argc, argv, bi) 293 int argc; 294 char **argv; 295 struct bootinfo *bi; 296 { 297 int loop; 298 u_int kerneldatasize, symbolsize; 299 u_int l1pagetable; 300 u_int l2pagetable; 301 vaddr_t freemempos; 302 extern char page0[], page0_end[]; 303 pv_addr_t kernel_l1pt; 304 pv_addr_t kernel_ptpt; 305 #ifdef DDB 306 Elf_Shdr *sh; 307 #endif 308 309 /* 310 * Heads up ... Setup the CPU / MMU / TLB functions 311 */ 312 set_cpufuncs(); 313 314 #ifdef DEBUG_BEFOREMMU 315 /* 316 * At this point, we cannot call real consinit(). 317 * Just call a faked up version of consinit(), which does the thing 318 * with MMU disabled. 319 */ 320 fakecninit(); 321 #endif 322 323 /* 324 * XXX for now, overwrite bootconfig to hardcoded values. 325 * XXX kill bootconfig and directly call uvm_physload 326 */ 327 bootconfig.dram[0].address = 0xc0000000; 328 bootconfig.dram[0].pages = 8192; 329 bootconfig.dramblocks = 1; 330 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 331 332 symbolsize = 0; 333 #ifdef DDB 334 if (! memcmp(&end, "\177ELF", 4)) { 335 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 336 loop = ((Elf_Ehdr *)&end)->e_shnum; 337 for(; loop; loop--, sh++) 338 if (sh->sh_offset > 0 && 339 (sh->sh_offset + sh->sh_size) > symbolsize) 340 symbolsize = sh->sh_offset + sh->sh_size; 341 } 342 #endif 343 344 printf("kernsize=0x%x\n", kerneldatasize); 345 kerneldatasize += symbolsize; 346 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 347 348 /* parse kernel args */ 349 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 350 for(argc--, argv++; argc; argc--, argv++) 351 switch(**argv) { 352 case 'a': 353 boothowto |= RB_ASKNAME; 354 break; 355 case 's': 356 boothowto |= RB_SINGLE; 357 break; 358 default: 359 break; 360 } 361 362 /* copy bootinfo into known kernel space */ 363 bootinfo_storage = *bi; 364 bootinfo = &bootinfo_storage; 365 366 #ifdef BOOTINFO_FB_WIDTH 367 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 368 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 369 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 370 bootinfo->fb_type = BOOTINFO_FB_TYPE; 371 #endif 372 373 /* 374 * hpcboot has loaded me with MMU disabled. 375 * So create kernel page tables and enable MMU 376 */ 377 378 /* 379 * Set up the variables that define the availablilty of physcial 380 * memory 381 */ 382 physical_start = bootconfig.dram[0].address; 383 physical_freestart = physical_start 384 + (KERNEL_TEXT_BASE - KERNEL_SPACE_START) + kerneldatasize; 385 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 386 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 387 physical_freeend = physical_end; 388 /* free_pages = bootconfig.drampages;*/ 389 390 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 391 physmem += bootconfig.dram[loop].pages; 392 393 /* XXX handle UMA framebuffer memory */ 394 395 /* Use the first 1MB to allocate things */ 396 freemempos = 0xc0000000; 397 memset((void *)0xc0000000, 0, KERNEL_TEXT_BASE - 0xc0000000); 398 399 /* 400 * Right We have the bottom meg of memory mapped to 0x00000000 401 * so was can get at it. The kernel will ocupy the start of it. 402 * After the kernel/args we allocate some of the fixed page tables 403 * we need to get the system going. 404 * We allocate one page directory and 8 page tables and store the 405 * physical addresses in the kernel_pt_table array. 406 * Must remember that neither the page L1 or L2 page tables are the 407 * same size as a page ! 408 * 409 * Ok the next bit of physical allocate may look complex but it is 410 * simple really. I have done it like this so that no memory gets 411 * wasted during the allocate of various pages and tables that are 412 * all different sizes. 413 * The start address will be page aligned. 414 * We allocate the kernel page directory on the first free 16KB 415 * boundry we find. 416 * We allocate the kernel page tables on the first 1KB boundry we find. 417 * We allocate 9 PT's. This means that in the process we 418 * KNOW that we will encounter at least 1 16KB boundry. 419 * 420 * Eventually if the top end of the memory gets used for process L1 421 * page tables the kernel L1 page table may be moved up there. 422 */ 423 424 #ifdef VERBOSE_INIT_ARM 425 printf("Allocating page tables\n"); 426 #endif 427 428 /* Define a macro to simplify memory allocation */ 429 #define valloc_pages(var, np) \ 430 (var).pv_pa = (var).pv_va = freemempos; \ 431 freemempos += (np) * NBPG; 432 #define alloc_pages(var, np) \ 433 (var) = freemempos; \ 434 freemempos += (np) * NBPG; 435 436 437 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 438 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 439 alloc_pages(kernel_pt_table[loop], PT_SIZE / NBPG); 440 } 441 442 /* 443 * Allocate a page for the system page mapped to V0x00000000 444 * This page will just contain the system vectors and can be 445 * shared by all processes. 446 */ 447 valloc_pages(systempage, 1); 448 449 /* Allocate a page for the page table to map kernel page tables*/ 450 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 451 452 /* Allocate stacks for all modes */ 453 valloc_pages(irqstack, IRQ_STACK_SIZE); 454 valloc_pages(abtstack, ABT_STACK_SIZE); 455 valloc_pages(undstack, UND_STACK_SIZE); 456 valloc_pages(kernelstack, UPAGES); 457 458 #ifdef VERBOSE_INIT_ARM 459 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 460 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 461 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 462 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 463 #endif 464 465 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 466 467 /* 468 * XXX Actually, we only need virtual space and don't need 469 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 470 */ 471 #ifdef CPU_SA110 472 /* 473 * XXX totally stuffed hack to work round problems introduced 474 * in recent versions of the pmap code. Due to the calls used there 475 * we cannot allocate virtual memory during bootstrap. 476 */ 477 for(;;) { 478 alloc_pages(sa110_cc_base, 1); 479 if (! (sa110_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 480 break; 481 } 482 { 483 vaddr_t dummy; 484 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 485 } 486 sa110_cache_clean_addr = sa110_cc_base; 487 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 488 #endif /* CPU_SA110 */ 489 490 alloc_pages(sa11x0_idle_mem, 1); 491 492 /* 493 * Ok we have allocated physical pages for the primary kernel 494 * page tables 495 */ 496 497 #ifdef VERBOSE_INIT_ARM 498 printf("Creating L1 page table\n"); 499 #endif 500 501 /* 502 * Now we start consturction of the L1 page table 503 * We start by mapping the L2 page tables into the L1. 504 * This means that we can replace L1 mappings later on if necessary 505 */ 506 l1pagetable = kernel_l1pt.pv_pa; 507 508 /* Map the L2 pages tables in the L1 page table */ 509 map_pagetable(l1pagetable, 0x00000000, 510 kernel_pt_table[KERNEL_PT_SYS]); 511 map_pagetable(l1pagetable, KERNEL_SPACE_START, 512 kernel_pt_table[KERNEL_PT_KERNEL]); 513 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 514 map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 515 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 516 map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE, 517 kernel_ptpt.pv_pa); 518 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 519 map_pagetable(l1pagetable, SAIPIO_BASE, 520 kernel_pt_table[KERNEL_PT_IO]); 521 522 523 #ifdef VERBOSE_INIT_ARM 524 printf("Mapping kernel\n"); 525 #endif 526 527 /* Now we fill in the L2 pagetable for the kernel code/data */ 528 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 529 530 /* 531 * XXX there is no ELF header to find RO region. 532 * XXX What should we do? 533 */ 534 #if 0 535 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 536 logical = map_chunk(l1pagetable, l2pagetable, KERNEL_TEXT_BASE, 537 physical_start, kernexec->a_text, 538 AP_KR, PT_CACHEABLE); 539 logical += map_chunk(l1pagetable, l2pagetable, 540 KERNEL_TEXT_BASE + logical, physical_start + logical, 541 kerneldatasize - kernexec->a_text, AP_KRW, PT_CACHEABLE); 542 } else 543 #endif 544 map_chunk(l1pagetable, l2pagetable, KERNEL_TEXT_BASE, 545 KERNEL_TEXT_BASE, kerneldatasize, 546 AP_KRW, PT_CACHEABLE); 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("Constructing L2 page tables\n"); 550 #endif 551 552 /* Map the stack pages */ 553 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 554 map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa, 555 IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 556 map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa, 557 ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 558 map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa, 559 UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 560 map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa, 561 UPAGES * NBPG, AP_KRW, PT_CACHEABLE); 562 map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 563 PD_SIZE, AP_KRW, 0); 564 565 /* Map the page table that maps the kernel pages */ 566 map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa); 567 568 /* Map a page for entering idle mode */ 569 map_entry_nc(l2pagetable, sa11x0_idle_mem, sa11x0_idle_mem); 570 571 /* 572 * Map entries in the page table used to map PTE's 573 * Basically every kernel page table gets mapped here 574 */ 575 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 576 l2pagetable = kernel_ptpt.pv_pa; 577 map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 578 kernel_pt_table[KERNEL_PT_SYS]); 579 map_entry_nc(l2pagetable, (KERNEL_SPACE_START >> (PGSHIFT-2)), 580 kernel_pt_table[KERNEL_PT_KERNEL]); 581 map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 582 kernel_pt_table[KERNEL_PT_KERNEL]); 583 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 584 map_entry_nc(l2pagetable, ((KERNEL_VM_BASE + 585 (loop * 0x00400000)) >> (PGSHIFT-2)), 586 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 587 } 588 map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 589 kernel_ptpt.pv_pa); 590 map_entry_nc(l2pagetable, (SAIPIO_BASE >> (PGSHIFT-2)), 591 kernel_pt_table[KERNEL_PT_IO]); 592 593 /* 594 * Map the system page in the kernel page table for the bottom 1Meg 595 * of the virtual memory map. 596 */ 597 l2pagetable = kernel_pt_table[KERNEL_PT_SYS]; 598 map_entry(l2pagetable, 0x0000000, systempage.pv_pa); 599 600 /* Map any I/O modules here, as we don't have real bus_space_map() */ 601 printf("mapping IO..."); 602 l2pagetable = kernel_pt_table[KERNEL_PT_IO]; 603 map_entry_nc(l2pagetable, SACOM3_BASE, SACOM3_HW_BASE); 604 605 #ifdef CPU_SA110 606 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 607 map_chunk(0, l2pagetable, sa110_cache_clean_addr, 608 0xe0000000, CPU_SA110_CACHE_CLEAN_SIZE, 609 AP_KRW, PT_CACHEABLE); 610 #endif 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 /* Right set up the vectors at the bottom of page 0 */ 620 memcpy((char *)systempage.pv_va, page0, page0_end - page0); 621 622 /* 623 * Pages were allocated during the secondary bootstrap for the 624 * stacks for different CPU modes. 625 * We must now set the r13 registers in the different CPU modes to 626 * point to these stacks. 627 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 628 * of the stack memory. 629 */ 630 printf("init subsystems: stacks "); 631 632 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 633 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 634 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 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 setttb(kernel_l1pt.pv_pa); 662 663 #ifdef BOOT_DUMP 664 dumppages((char *)0xc0000000, 16 * NBPG); 665 dumppages((char *)0xb0100000, 64); /* XXX */ 666 #endif 667 /* Enable MMU, I-cache, D-cache, write buffer. */ 668 cpufunc_control(0x337f, 0x107d); 669 670 consinit(); 671 672 #ifdef VERBOSE_INIT_ARM 673 printf("freemempos=%08lx\n", freemempos); 674 printf("MMU enabled. control=%08x\n", cpu_get_control()); 675 #endif 676 677 /* Boot strap pmap telling it where the kernel page table is */ 678 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 679 680 681 #ifdef CPU_SA110 682 if (cputype == CPU_ID_SA110) 683 rpc_sa110_cc_setup(); 684 #endif /* CPU_SA110 */ 685 686 #ifdef IPKDB 687 /* Initialise ipkdb */ 688 ipkdb_init(); 689 if (boothowto & RB_KDB) 690 ipkdb_connect(0); 691 #endif /* NIPKDB */ 692 693 #ifdef BOOT_DUMP 694 dumppages((char *)kernel_l1pt.pv_va, 16); 695 dumppages((char *)PROCESS_PAGE_TBLS_BASE, 16); 696 #endif 697 698 #ifdef DDB 699 { 700 static struct undefined_handler uh; 701 702 uh.uh_handler = db_trapper; 703 install_coproc_handler_static(0, &uh); 704 } 705 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 706 #endif 707 708 printf("kernsize=0x%x", kerneldatasize); 709 printf(" (including 0x%x symbols)\n", symbolsize); 710 711 #ifdef DDB 712 if (boothowto & RB_KDB) 713 Debugger(); 714 #endif /* DDB */ 715 716 if (bootinfo->magic == BOOTINFO_MAGIC) { 717 platid.dw.dw0 = bootinfo->platid_cpu; 718 platid.dw.dw1 = bootinfo->platid_machine; 719 } 720 721 /* We return the new stack pointer address */ 722 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 723 } 724 725 void 726 consinit(void) 727 { 728 static int consinit_called = 0; 729 730 if (consinit_called != 0) 731 return; 732 733 consinit_called = 1; 734 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 735 cninit(); 736 else { 737 /* 738 * Nothing to do here. Console initialization is done at 739 * autoconf device attach time. 740 */ 741 } 742 } 743 744 #ifdef DEBUG_BEFOREMMU 745 cons_decl(sacom); 746 void 747 fakecninit() 748 { 749 static struct consdev fakecntab = cons_init(sacom); 750 cn_tab = &fakecntab; 751 752 (*cn_tab->cn_init)(0); 753 cn_tab->cn_pri = CN_REMOTE; 754 } 755 #endif 756 757 #ifdef CPU_SA110 758 759 /* 760 * For optimal cache cleaning we need two 16K banks of 761 * virtual address space that NOTHING else will access 762 * and then we alternate the cache cleaning between the 763 * two banks. 764 * The cache cleaning code requires requires 2 banks aligned 765 * on total size boundry so the banks can be alternated by 766 * eorring the size bit (assumes the bank size is a power of 2) 767 */ 768 void 769 rpc_sa110_cc_setup(void) 770 { 771 int loop; 772 paddr_t kaddr; 773 pt_entry_t *pte; 774 775 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 776 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) { 777 pte = pmap_pte(pmap_kernel(), (sa110_cc_base + loop)); 778 *pte = L2_PTE(kaddr, AP_KR); 779 } 780 sa110_cache_clean_addr = sa110_cc_base; 781 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 782 } 783 #endif /* CPU_SA110 */ 784 785 #ifdef BOOT_DUMP 786 void dumppages(char *start, int nbytes) 787 { 788 char *p = start; 789 char *p1; 790 int i; 791 792 for(i = nbytes; i > 0; i -= 16, p += 16) { 793 for(p1 = p + 15; p != p1; p1--) { 794 if (*p1) 795 break; 796 } 797 if (! *p1) 798 continue; 799 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 800 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 801 (unsigned int)p, 802 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 803 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 804 } 805 } 806 #endif 807 808 /* End of machdep.c */ 809