1 /* $NetBSD: hpc_machdep.c,v 1.14 2001/06/19 13:45:55 wiz 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/irqhandler.h> 84 #include <machine/katelib.h> 85 #include <machine/pte.h> 86 #include <machine/bootinfo.h> 87 #include <machine/undefined.h> 88 #include <machine/rtc.h> 89 #include <hpc/hpc/platid.h> 90 #include <hpcarm/sa11x0/sa11x0_reg.h> 91 92 #include <dev/hpc/bicons.h> 93 94 #include "opt_ipkdb.h" 95 96 /* XXX for consinit related hacks */ 97 #include <sys/conf.h> 98 99 /* 100 * Address to call from cpu_reset() to reset the machine. 101 * This is machine architecture dependant as it varies depending 102 * on where the ROM appears when you turn the MMU off. 103 */ 104 105 u_int cpu_reset_address = 0; 106 107 /* Define various stack sizes in pages */ 108 #define IRQ_STACK_SIZE 1 109 #define ABT_STACK_SIZE 1 110 #ifdef IPKDB 111 #define UND_STACK_SIZE 2 112 #else 113 #define UND_STACK_SIZE 1 114 #endif 115 116 BootConfig bootconfig; /* Boot config storage */ 117 struct bootinfo *bootinfo, bootinfo_storage; 118 char booted_kernel[80]; 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 #define biconscnpollc nullcnpollc 128 cons_decl(bicons); 129 static struct consdev bicons = cons_init(bicons); 130 131 #ifndef PMAP_STATIC_L1S 132 int max_processes = 64; /* Default number */ 133 #endif /* !PMAP_STATIC_L1S */ 134 135 136 /* Physical and virtual addresses for some global pages */ 137 pv_addr_t systempage; 138 pv_addr_t irqstack; 139 pv_addr_t undstack; 140 pv_addr_t abtstack; 141 pv_addr_t kernelstack; 142 143 char *boot_args = NULL; 144 char *boot_file = NULL; 145 146 vm_offset_t msgbufphys; 147 148 extern u_int data_abort_handler_address; 149 extern u_int prefetch_abort_handler_address; 150 extern u_int undefined_handler_address; 151 extern int end; 152 153 #ifdef PMAP_DEBUG 154 extern int pmap_debug_level; 155 #endif /* PMAP_DEBUG */ 156 157 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 158 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 159 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 160 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 161 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 162 #define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2)) 163 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 164 165 pt_entry_t kernel_pt_table[NUM_KERNEL_PTS]; 166 167 struct user *proc0paddr; 168 169 #ifdef CPU_SA110 170 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 171 extern unsigned int sa110_cache_clean_addr; 172 extern unsigned int sa110_cache_clean_size; 173 static vaddr_t sa110_cc_base; 174 #endif /* CPU_SA110 */ 175 /* Non-buffered non-cachable memory needed to enter idle mode */ 176 vaddr_t sa11x0_idle_mem; 177 178 /* Prototypes */ 179 180 void physcon_display_base __P((u_int addr)); 181 extern void consinit __P((void)); 182 183 void map_section __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa, 184 int cacheable)); 185 void map_pagetable __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 186 void map_entry __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 187 void map_entry_nc __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 188 void map_entry_ro __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 189 vm_size_t map_chunk __P((vm_offset_t pd, vm_offset_t pt, vm_offset_t va, 190 vm_offset_t pa, vm_size_t size, u_int acc, 191 u_int flg)); 192 193 void data_abort_handler __P((trapframe_t *frame)); 194 void prefetch_abort_handler __P((trapframe_t *frame)); 195 void undefinedinstruction_bounce __P((trapframe_t *frame)); 196 void zero_page_readonly __P((void)); 197 void zero_page_readwrite __P((void)); 198 199 u_int cpu_get_control __P((void)); 200 201 void rpc_sa110_cc_setup(void); 202 203 #ifdef DEBUG_BEFOREMMU 204 static void fakecninit(); 205 #endif 206 207 #ifdef BOOT_DUMP 208 void dumppages(char *, int); 209 #endif 210 211 extern int db_trapper(); 212 213 extern void dump_spl_masks __P((void)); 214 extern pt_entry_t *pmap_pte __P((pmap_t pmap, vm_offset_t va)); 215 extern void db_machine_init __P((void)); 216 217 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 /* 286 * 287 * Initial entry point on startup. This gets called before main() is 288 * entered. 289 * It should be responsible for setting up everything that must be 290 * in place when main is called. 291 * This includes 292 * Taking a copy of the boot configuration structure. 293 * Initialising the physical console so characters can be printed. 294 * Setting up page tables for the kernel 295 */ 296 297 u_int 298 initarm(argc, argv, bi) 299 int argc; 300 char **argv; 301 struct bootinfo *bi; 302 { 303 int loop; 304 u_int kerneldatasize, symbolsize; 305 u_int l1pagetable; 306 u_int l2pagetable; 307 vm_offset_t freemempos; 308 extern char page0[], page0_end[]; 309 pv_addr_t kernel_l1pt; 310 pv_addr_t kernel_ptpt; 311 #ifdef DDB 312 Elf_Shdr *sh; 313 #endif 314 315 /* 316 * Heads up ... Setup the CPU / MMU / TLB functions 317 */ 318 set_cpufuncs(); 319 320 #ifdef DEBUG_BEFOREMMU 321 /* 322 * At this point, we cannot call real consinit(). 323 * Just call a faked up version of consinit(), which does the thing 324 * with MMU disabled. 325 */ 326 fakecninit(); 327 #endif 328 329 /* 330 * XXX for now, overwrite bootconfig to hardcoded values. 331 * XXX kill bootconfig and directly call uvm_physload 332 */ 333 bootconfig.dram[0].address = 0xc0000000; 334 bootconfig.dram[0].pages = 8192; 335 bootconfig.dramblocks = 1; 336 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 337 338 symbolsize = 0; 339 #ifdef DDB 340 if (! memcmp(&end, "\177ELF", 4)) { 341 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 342 loop = ((Elf_Ehdr *)&end)->e_shnum; 343 for(; loop; loop--, sh++) 344 if (sh->sh_offset > 0 && 345 (sh->sh_offset + sh->sh_size) > symbolsize) 346 symbolsize = sh->sh_offset + sh->sh_size; 347 } 348 #endif 349 350 printf("kernsize=0x%x\n", kerneldatasize); 351 kerneldatasize += symbolsize; 352 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 353 354 /* parse kernel args */ 355 strncpy(booted_kernel, *argv, sizeof(booted_kernel)); 356 for(argc--, argv++; argc; argc--, argv++) 357 switch(**argv) { 358 case 'a': 359 boothowto |= RB_ASKNAME; 360 break; 361 case 's': 362 boothowto |= RB_SINGLE; 363 break; 364 default: 365 break; 366 } 367 368 /* copy bootinfo into known kernel space */ 369 bootinfo_storage = *bi; 370 bootinfo = &bootinfo_storage; 371 372 #ifdef BOOTINFO_FB_WIDTH 373 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 374 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 375 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 376 bootinfo->fb_type = BOOTINFO_FB_TYPE; 377 #endif 378 379 /* 380 * hpcboot has loaded me with MMU disabled. 381 * So create kernel page tables and enable MMU 382 */ 383 384 /* 385 * Set up the variables that define the availablilty of physcial 386 * memory 387 */ 388 physical_start = bootconfig.dram[0].address; 389 physical_freestart = physical_start 390 + (KERNEL_TEXT_BASE - KERNEL_SPACE_START) + kerneldatasize; 391 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 392 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 393 physical_freeend = physical_end; 394 /* free_pages = bootconfig.drampages;*/ 395 396 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 397 physmem += bootconfig.dram[loop].pages; 398 399 /* XXX handle UMA framebuffer memory */ 400 401 /* Use the first 1MB to allocate things */ 402 freemempos = 0xc0000000; 403 memset((void *)0xc0000000, 0, 0x80000); 404 405 /* 406 * Right We have the bottom meg of memory mapped to 0x00000000 407 * so was can get at it. The kernel will ocupy the start of it. 408 * After the kernel/args we allocate some of the fixed page tables 409 * we need to get the system going. 410 * We allocate one page directory and 8 page tables and store the 411 * physical addresses in the kernel_pt_table array. 412 * Must remember that neither the page L1 or L2 page tables are the 413 * same size as a page ! 414 * 415 * Ok the next bit of physical allocate may look complex but it is 416 * simple really. I have done it like this so that no memory gets 417 * wasted during the allocate of various pages and tables that are 418 * all different sizes. 419 * The start address will be page aligned. 420 * We allocate the kernel page directory on the first free 16KB 421 * boundry we find. 422 * We allocate the kernel page tables on the first 1KB boundry we find. 423 * We allocate 9 PT's. This means that in the process we 424 * KNOW that we will encounter at least 1 16KB boundry. 425 * 426 * Eventually if the top end of the memory gets used for process L1 427 * page tables the kernel L1 page table may be moved up there. 428 */ 429 430 #ifdef VERBOSE_INIT_ARM 431 printf("Allocating page tables\n"); 432 #endif 433 434 /* Define a macro to simplify memory allocation */ 435 #define valloc_pages(var, np) \ 436 (var).pv_pa = (var).pv_va = freemempos; \ 437 freemempos += (np) * NBPG; 438 #define alloc_pages(var, np) \ 439 (var) = freemempos; \ 440 freemempos += (np) * NBPG; 441 442 443 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 444 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 445 alloc_pages(kernel_pt_table[loop], PT_SIZE / NBPG); 446 } 447 448 /* 449 * Allocate a page for the system page mapped to V0x00000000 450 * This page will just contain the system vectors and can be 451 * shared by all processes. 452 */ 453 valloc_pages(systempage, 1); 454 455 /* Allocate a page for the page table to map kernel page tables*/ 456 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 457 458 /* Allocate stacks for all modes */ 459 valloc_pages(irqstack, IRQ_STACK_SIZE); 460 valloc_pages(abtstack, ABT_STACK_SIZE); 461 valloc_pages(undstack, UND_STACK_SIZE); 462 valloc_pages(kernelstack, UPAGES); 463 464 #ifdef VERBOSE_INIT_ARM 465 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 466 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 467 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 468 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 469 #endif 470 471 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 472 473 /* 474 * XXX Actually, we only need virtual space and don't need 475 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 476 */ 477 #ifdef CPU_SA110 478 /* 479 * XXX totally stuffed hack to work round problems introduced 480 * in recent versions of the pmap code. Due to the calls used there 481 * we cannot allocate virtual memory during bootstrap. 482 */ 483 for(;;) { 484 alloc_pages(sa110_cc_base, 1); 485 if (! (sa110_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 486 break; 487 } 488 { 489 vaddr_t dummy; 490 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 491 } 492 sa110_cache_clean_addr = sa110_cc_base; 493 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 494 #endif /* CPU_SA110 */ 495 496 alloc_pages(sa11x0_idle_mem, 1); 497 498 /* 499 * Ok we have allocated physical pages for the primary kernel 500 * page tables 501 */ 502 503 #ifdef VERBOSE_INIT_ARM 504 printf("Creating L1 page table\n"); 505 #endif 506 507 /* 508 * Now we start consturction of the L1 page table 509 * We start by mapping the L2 page tables into the L1. 510 * This means that we can replace L1 mappings later on if necessary 511 */ 512 l1pagetable = kernel_l1pt.pv_pa; 513 514 /* Map the L2 pages tables in the L1 page table */ 515 map_pagetable(l1pagetable, 0x00000000, 516 kernel_pt_table[KERNEL_PT_SYS]); 517 map_pagetable(l1pagetable, KERNEL_SPACE_START, 518 kernel_pt_table[KERNEL_PT_KERNEL]); 519 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 520 map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 521 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 522 map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE, 523 kernel_ptpt.pv_pa); 524 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 525 map_pagetable(l1pagetable, SAIPIO_BASE, 526 kernel_pt_table[KERNEL_PT_IO]); 527 528 529 #ifdef VERBOSE_INIT_ARM 530 printf("Mapping kernel\n"); 531 #endif 532 533 /* Now we fill in the L2 pagetable for the kernel code/data */ 534 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 535 536 /* 537 * XXX there is no ELF header to find RO region. 538 * XXX What should we do? 539 */ 540 #if 0 541 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 542 logical = map_chunk(l1pagetable, l2pagetable, KERNEL_TEXT_BASE, 543 physical_start, kernexec->a_text, 544 AP_KR, PT_CACHEABLE); 545 logical += map_chunk(l1pagetable, l2pagetable, 546 KERNEL_TEXT_BASE + logical, physical_start + logical, 547 kerneldatasize - kernexec->a_text, AP_KRW, PT_CACHEABLE); 548 } else 549 #endif 550 map_chunk(l1pagetable, l2pagetable, KERNEL_TEXT_BASE, 551 KERNEL_TEXT_BASE, kerneldatasize, 552 AP_KRW, PT_CACHEABLE); 553 554 #ifdef VERBOSE_INIT_ARM 555 printf("Constructing L2 page tables\n"); 556 #endif 557 558 /* Map the stack pages */ 559 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 560 map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa, 561 IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 562 map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa, 563 ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 564 map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa, 565 UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 566 map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa, 567 UPAGES * NBPG, AP_KRW, PT_CACHEABLE); 568 map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 569 PD_SIZE, AP_KRW, 0); 570 571 /* Map the page table that maps the kernel pages */ 572 map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa); 573 574 /* Map a page for entering idle mode */ 575 map_entry_nc(l2pagetable, sa11x0_idle_mem, sa11x0_idle_mem); 576 577 /* 578 * Map entries in the page table used to map PTE's 579 * Basically every kernel page table gets mapped here 580 */ 581 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 582 l2pagetable = kernel_ptpt.pv_pa; 583 map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 584 kernel_pt_table[KERNEL_PT_SYS]); 585 map_entry_nc(l2pagetable, (KERNEL_SPACE_START >> (PGSHIFT-2)), 586 kernel_pt_table[KERNEL_PT_KERNEL]); 587 map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 588 kernel_pt_table[KERNEL_PT_KERNEL]); 589 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 590 map_entry_nc(l2pagetable, ((KERNEL_VM_BASE + 591 (loop * 0x00400000)) >> (PGSHIFT-2)), 592 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 593 } 594 map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 595 kernel_ptpt.pv_pa); 596 map_entry_nc(l2pagetable, (SAIPIO_BASE >> (PGSHIFT-2)), 597 kernel_pt_table[KERNEL_PT_IO]); 598 599 /* 600 * Map the system page in the kernel page table for the bottom 1Meg 601 * of the virtual memory map. 602 */ 603 l2pagetable = kernel_pt_table[KERNEL_PT_SYS]; 604 map_entry(l2pagetable, 0x0000000, systempage.pv_pa); 605 606 /* Map any I/O modules here, as we don't have real bus_space_map() */ 607 printf("mapping IO..."); 608 l2pagetable = kernel_pt_table[KERNEL_PT_IO]; 609 map_entry_nc(l2pagetable, SACOM3_BASE, SACOM3_HW_BASE); 610 611 #ifdef CPU_SA110 612 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 613 map_chunk(0, l2pagetable, sa110_cache_clean_addr, 614 0xe0000000, CPU_SA110_CACHE_CLEAN_SIZE, 615 AP_KRW, PT_CACHEABLE); 616 #endif 617 /* 618 * Now we have the real page tables in place so we can switch to them. 619 * Once this is done we will be running with the REAL kernel page 620 * tables. 621 */ 622 623 printf("done.\n"); 624 625 /* Right set up the vectors at the bottom of page 0 */ 626 memcpy((char *)systempage.pv_va, page0, page0_end - page0); 627 628 /* 629 * Pages were allocated during the secondary bootstrap for the 630 * stacks for different CPU modes. 631 * We must now set the r13 registers in the different CPU modes to 632 * point to these stacks. 633 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 634 * of the stack memory. 635 */ 636 printf("init subsystems: stacks "); 637 638 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 639 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 640 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 641 #ifdef PMAP_DEBUG 642 if (pmap_debug_level >= 0) 643 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 644 kernelstack.pv_pa); 645 #endif /* PMAP_DEBUG */ 646 647 /* 648 * Well we should set a data abort handler. 649 * Once things get going this will change as we will need a proper 650 * handler. Until then we will use a handler that just panics but 651 * tells us why. 652 * Initialisation of the vectors will just panic on a data abort. 653 * This just fills in a slighly better one. 654 */ 655 printf("vectors "); 656 data_abort_handler_address = (u_int)data_abort_handler; 657 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 658 undefined_handler_address = (u_int)undefinedinstruction_bounce; 659 printf("%08x %08x %08x\n", data_abort_handler_address, 660 prefetch_abort_handler_address, undefined_handler_address); 661 662 /* Initialise the undefined instruction handlers */ 663 printf("undefined "); 664 undefined_init(); 665 666 /* Set the page table address. */ 667 setttb(kernel_l1pt.pv_pa); 668 669 #ifdef BOOT_DUMP 670 dumppages((char *)0xc0000000, 16 * NBPG); 671 dumppages((char *)0xb0100000, 64); /* XXX */ 672 #endif 673 /* Enable MMU, I-cache, D-cache, write buffer. */ 674 cpufunc_control(0x337f, 0x107d); 675 676 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 677 consinit(); 678 else { 679 /* XXX this isn't useful for normal use, but helps debuging */ 680 biconscninit(&bicons); 681 cn_tab = &bicons; 682 cn_tab->cn_pri = CN_REMOTE; 683 } 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("MMU enabled. control=%08x\n", cpu_get_control()); 687 #endif 688 689 /* Boot strap pmap telling it where the kernel page table is */ 690 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 691 692 693 #ifdef CPU_SA110 694 if (cputype == CPU_ID_SA110) 695 rpc_sa110_cc_setup(); 696 #endif /* CPU_SA110 */ 697 698 #ifdef IPKDB 699 /* Initialise ipkdb */ 700 ipkdb_init(); 701 if (boothowto & RB_KDB) 702 ipkdb_connect(0); 703 #endif /* NIPKDB */ 704 705 #ifdef BOOT_DUMP 706 dumppages((char *)kernel_l1pt.pv_va, 16); 707 dumppages((char *)PROCESS_PAGE_TBLS_BASE, 16); 708 #endif 709 710 #ifdef DDB 711 { 712 static struct undefined_handler uh; 713 714 uh.uh_handler = db_trapper; 715 install_coproc_handler_static(0, &uh); 716 } 717 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 718 #endif 719 720 printf("kernsize=0x%x", kerneldatasize); 721 printf(" (including 0x%x symbols)\n", symbolsize); 722 723 #ifdef DDB 724 if (boothowto & RB_KDB) 725 Debugger(); 726 #endif /* DDB */ 727 728 if (bootinfo->magic == BOOTINFO_MAGIC) { 729 platid.dw.dw0 = bootinfo->platid_cpu; 730 platid.dw.dw1 = bootinfo->platid_machine; 731 } 732 733 /* We return the new stack pointer address */ 734 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 735 } 736 737 #ifdef DEBUG_BEFOREMMU 738 cons_decl(sacom); 739 void 740 fakecninit() 741 { 742 static struct consdev fakecntab = cons_init(sacom); 743 cn_tab = &fakecntab; 744 745 (*cn_tab->cn_init)(0); 746 cn_tab->cn_pri = CN_REMOTE; 747 } 748 #endif 749 750 #ifdef CPU_SA110 751 752 /* 753 * For optimal cache cleaning we need two 16K banks of 754 * virtual address space that NOTHING else will access 755 * and then we alternate the cache cleaning between the 756 * two banks. 757 * The cache cleaning code requires requires 2 banks aligned 758 * on total size boundry so the banks can be alternated by 759 * eorring the size bit (assumes the bank size is a power of 2) 760 */ 761 void 762 rpc_sa110_cc_setup(void) 763 { 764 int loop; 765 paddr_t kaddr; 766 pt_entry_t *pte; 767 768 (void) pmap_extract(kernel_pmap, KERNEL_TEXT_BASE, &kaddr); 769 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) { 770 pte = pmap_pte(kernel_pmap, (sa110_cc_base + loop)); 771 *pte = L2_PTE(kaddr, AP_KR); 772 } 773 sa110_cache_clean_addr = sa110_cc_base; 774 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 775 } 776 #endif /* CPU_SA110 */ 777 778 #ifdef BOOT_DUMP 779 void dumppages(char *start, int nbytes) 780 { 781 char *p = start; 782 char *p1; 783 int i; 784 785 for(i = nbytes; i > 0; i -= 16, p += 16) { 786 for(p1 = p + 15; p != p1; p1--) { 787 if (*p1) 788 break; 789 } 790 if (! *p1) 791 continue; 792 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 793 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 794 (unsigned int)p, 795 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 796 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 797 } 798 } 799 #endif 800 801 /* End of machdep.c */ 802