1 /* $NetBSD: hpc_machdep.c,v 1.55 2002/10/05 17:12:09 chs 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_ddb.h" 52 #include "opt_pmap_debug.h" 53 #include "fs_nfs.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/cpuconf.h> 87 #include <arm/undefined.h> 88 #include <machine/rtc.h> 89 #include <machine/platid.h> 90 91 #include <arm/sa11x0/sa11x0_reg.h> 92 93 #include <dev/hpc/bicons.h> 94 95 #include "opt_ipkdb.h" 96 97 /* XXX for consinit related hacks */ 98 #include <sys/conf.h> 99 100 #ifdef NFS 101 #include <sys/mount.h> 102 #include <nfs/rpcv2.h> 103 #include <nfs/nfsproto.h> 104 #include <nfs/nfs.h> 105 #include <nfs/nfsmount.h> 106 #endif 107 108 /* 109 * Address to call from cpu_reset() to reset the machine. 110 * This is machine architecture dependant as it varies depending 111 * on where the ROM appears when you turn the MMU off. 112 */ 113 114 u_int cpu_reset_address = 0; 115 116 /* Define various stack sizes in pages */ 117 #define IRQ_STACK_SIZE 1 118 #define ABT_STACK_SIZE 1 119 #ifdef IPKDB 120 #define UND_STACK_SIZE 2 121 #else 122 #define UND_STACK_SIZE 1 123 #endif 124 125 BootConfig bootconfig; /* Boot config storage */ 126 struct bootinfo *bootinfo, bootinfo_storage; 127 static char booted_kernel_storage[80]; 128 char *booted_kernel = booted_kernel_storage; 129 130 paddr_t physical_start; 131 paddr_t physical_freestart; 132 paddr_t physical_freeend; 133 paddr_t physical_end; 134 u_int free_pages; 135 int physmem = 0; 136 137 #ifndef PMAP_STATIC_L1S 138 int max_processes = 64; /* Default number */ 139 #endif /* !PMAP_STATIC_L1S */ 140 141 142 /* Physical and virtual addresses for some global pages */ 143 pv_addr_t systempage; 144 pv_addr_t irqstack; 145 pv_addr_t undstack; 146 pv_addr_t abtstack; 147 pv_addr_t kernelstack; 148 149 char *boot_args = NULL; 150 char boot_file[16]; 151 152 vaddr_t msgbufphys; 153 154 extern u_int data_abort_handler_address; 155 extern u_int prefetch_abort_handler_address; 156 extern u_int undefined_handler_address; 157 extern int end; 158 159 #ifdef PMAP_DEBUG 160 extern int pmap_debug_level; 161 #endif /* PMAP_DEBUG */ 162 163 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 164 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 165 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */ 166 #define KERNEL_PT_IO 3 /* Page table for mapping IO */ 167 #define KERNEL_PT_VMDATA 4 /* Page tables for mapping kernel VM */ 168 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 169 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 170 171 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 172 173 struct user *proc0paddr; 174 175 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 176 extern unsigned int sa1_cache_clean_addr; 177 extern unsigned int sa1_cache_clean_size; 178 static vaddr_t sa1_cc_base; 179 180 /* Non-buffered non-cachable memory needed to enter idle mode */ 181 extern vaddr_t sa11x0_idle_mem; 182 183 /* Prototypes */ 184 185 void physcon_display_base __P((u_int addr)); 186 void consinit __P((void)); 187 188 void data_abort_handler __P((trapframe_t *frame)); 189 void prefetch_abort_handler __P((trapframe_t *frame)); 190 void undefinedinstruction_bounce __P((trapframe_t *frame)); 191 192 u_int cpu_get_control __P((void)); 193 194 void rpc_sa110_cc_setup(void); 195 196 #ifdef DEBUG_BEFOREMMU 197 static void fakecninit(); 198 #endif 199 200 #ifdef BOOT_DUMP 201 void dumppages(char *, int); 202 #endif 203 204 u_int initarm(int, char **, struct bootinfo *); 205 extern int db_trapper(u_int, u_int, trapframe_t *, int); 206 extern void dump_spl_masks __P((void)); 207 extern void dumpsys __P((void)); 208 209 /* 210 * void cpu_reboot(int howto, char *bootstr) 211 * 212 * Reboots the system 213 * 214 * Deal with any syncing, unmounting, dumping and shutdown hooks, 215 * then reset the CPU. 216 */ 217 218 void 219 cpu_reboot(howto, bootstr) 220 int howto; 221 char *bootstr; 222 { 223 /* 224 * If we are still cold then hit the air brakes 225 * and crash to earth fast 226 */ 227 if (cold) { 228 doshutdownhooks(); 229 printf("Halted while still in the ICE age.\n"); 230 printf("The operating system has halted.\n"); 231 printf("Please press any key to reboot.\n\n"); 232 cngetc(); 233 printf("rebooting...\n"); 234 cpu_reset(); 235 /*NOTREACHED*/ 236 } 237 238 /* Disable console buffering */ 239 cnpollc(1); 240 241 /* 242 * If RB_NOSYNC was not specified sync the discs. 243 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 244 * It looks like syslogd is getting woken up only to find that it cannot 245 * page part of the binary in as the filesystem has been unmounted. 246 */ 247 if (!(howto & RB_NOSYNC)) 248 bootsync(); 249 250 /* Say NO to interrupts */ 251 splhigh(); 252 253 /* Do a dump if requested. */ 254 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 255 dumpsys(); 256 257 258 /* Run any shutdown hooks */ 259 doshutdownhooks(); 260 261 /* Make sure IRQ's are disabled */ 262 IRQdisable; 263 264 if (howto & RB_HALT) { 265 printf("The operating system has halted.\n"); 266 printf("Please press any key to reboot.\n\n"); 267 cngetc(); 268 } 269 270 printf("rebooting...\n"); 271 cpu_reset(); 272 /*NOTREACHED*/ 273 } 274 275 /* 276 * 277 * Initial entry point on startup. This gets called before main() is 278 * entered. 279 * It should be responsible for setting up everything that must be 280 * in place when main is called. 281 * This includes 282 * Taking a copy of the boot configuration structure. 283 * Initialising the physical console so characters can be printed. 284 * Setting up page tables for the kernel 285 */ 286 287 u_int 288 initarm(argc, argv, bi) 289 int argc; 290 char **argv; 291 struct bootinfo *bi; 292 { 293 int loop; 294 u_int kerneldatasize, symbolsize; 295 u_int l1pagetable; 296 vaddr_t freemempos; 297 pv_addr_t kernel_l1pt; 298 pv_addr_t kernel_ptpt; 299 #ifdef DDB 300 Elf_Shdr *sh; 301 #endif 302 303 /* 304 * Heads up ... Setup the CPU / MMU / TLB functions 305 */ 306 set_cpufuncs(); 307 308 #ifdef DEBUG_BEFOREMMU 309 /* 310 * At this point, we cannot call real consinit(). 311 * Just call a faked up version of consinit(), which does the thing 312 * with MMU disabled. 313 */ 314 fakecninit(); 315 #endif 316 317 /* 318 * XXX for now, overwrite bootconfig to hardcoded values. 319 * XXX kill bootconfig and directly call uvm_physload 320 */ 321 bootconfig.dram[0].address = 0xc0000000; 322 bootconfig.dram[0].pages = 8192; 323 bootconfig.dramblocks = 1; 324 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 325 326 symbolsize = 0; 327 #ifdef DDB 328 if (! memcmp(&end, "\177ELF", 4)) { 329 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 330 loop = ((Elf_Ehdr *)&end)->e_shnum; 331 for(; loop; loop--, sh++) 332 if (sh->sh_offset > 0 && 333 (sh->sh_offset + sh->sh_size) > symbolsize) 334 symbolsize = sh->sh_offset + sh->sh_size; 335 } 336 #endif 337 338 printf("kernsize=0x%x\n", kerneldatasize); 339 kerneldatasize += symbolsize; 340 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 341 342 /* parse kernel args */ 343 boot_file[0] = '\0'; 344 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 345 for(argc--, argv++; argc; argc--, argv++) 346 switch(**argv) { 347 case 'a': 348 boothowto |= RB_ASKNAME; 349 break; 350 case 's': 351 boothowto |= RB_SINGLE; 352 break; 353 case 'b': 354 /* boot device: -b=sd0 etc. */ 355 #ifdef NFS 356 if (strcmp(*argv + 2, "nfs") == 0) 357 mountroot = nfs_mountroot; 358 else 359 strncpy(boot_file, *argv + 2, 360 sizeof(boot_file)); 361 #else /* NFS */ 362 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 363 #endif /* NFS */ 364 break; 365 default: 366 break; 367 } 368 369 /* copy bootinfo into known kernel space */ 370 bootinfo_storage = *bi; 371 bootinfo = &bootinfo_storage; 372 373 #ifdef BOOTINFO_FB_WIDTH 374 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 375 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 376 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 377 bootinfo->fb_type = BOOTINFO_FB_TYPE; 378 #endif 379 380 /* 381 * hpcboot has loaded me with MMU disabled. 382 * So create kernel page tables and enable MMU 383 */ 384 385 /* 386 * Set up the variables that define the availablilty of physcial 387 * memory 388 */ 389 physical_start = bootconfig.dram[0].address; 390 physical_freestart = physical_start 391 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 392 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 393 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 394 physical_freeend = physical_end; 395 /* free_pages = bootconfig.drampages;*/ 396 397 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 398 physmem += bootconfig.dram[loop].pages; 399 400 /* XXX handle UMA framebuffer memory */ 401 402 /* Use the first 1MB to allocate things */ 403 freemempos = 0xc0000000; 404 memset((void *)0xc0000000, 0, KERNEL_TEXT_BASE - 0xc0000000); 405 406 /* 407 * Right We have the bottom meg of memory mapped to 0x00000000 408 * so was can get at it. The kernel will ocupy the start of it. 409 * After the kernel/args we allocate some of the fixed page tables 410 * we need to get the system going. 411 * We allocate one page directory and 8 page tables and store the 412 * physical addresses in the kernel_pt_table array. 413 * Must remember that neither the page L1 or L2 page tables are the 414 * same size as a page ! 415 * 416 * Ok the next bit of physical allocate may look complex but it is 417 * simple really. I have done it like this so that no memory gets 418 * wasted during the allocate of various pages and tables that are 419 * all different sizes. 420 * The start address will be page aligned. 421 * We allocate the kernel page directory on the first free 16KB 422 * boundry we find. 423 * We allocate the kernel page tables on the first 1KB boundry we find. 424 * We allocate 9 PT's. This means that in the process we 425 * KNOW that we will encounter at least 1 16KB boundry. 426 * 427 * Eventually if the top end of the memory gets used for process L1 428 * page tables the kernel L1 page table may be moved up there. 429 */ 430 431 #ifdef VERBOSE_INIT_ARM 432 printf("Allocating page tables\n"); 433 #endif 434 435 /* Define a macro to simplify memory allocation */ 436 #define valloc_pages(var, np) \ 437 (var).pv_pa = (var).pv_va = freemempos; \ 438 freemempos += (np) * NBPG; 439 #define alloc_pages(var, np) \ 440 (var) = freemempos; \ 441 freemempos += (np) * NBPG; 442 443 444 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 445 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 446 alloc_pages(kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE / NBPG); 447 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 448 } 449 450 /* 451 * Allocate a page for the system page mapped to V0x00000000 452 * This page will just contain the system vectors and can be 453 * shared by all processes. 454 */ 455 valloc_pages(systempage, 1); 456 457 /* Allocate a page for the page table to map kernel page tables*/ 458 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 459 460 /* Allocate stacks for all modes */ 461 valloc_pages(irqstack, IRQ_STACK_SIZE); 462 valloc_pages(abtstack, ABT_STACK_SIZE); 463 valloc_pages(undstack, UND_STACK_SIZE); 464 valloc_pages(kernelstack, UPAGES); 465 466 #ifdef VERBOSE_INIT_ARM 467 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 468 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 469 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 470 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 471 #endif 472 473 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 474 475 /* 476 * XXX Actually, we only need virtual space and don't need 477 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 478 */ 479 /* 480 * XXX totally stuffed hack to work round problems introduced 481 * in recent versions of the pmap code. Due to the calls used there 482 * we cannot allocate virtual memory during bootstrap. 483 */ 484 for(;;) { 485 alloc_pages(sa1_cc_base, 1); 486 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 487 break; 488 } 489 { 490 vaddr_t dummy; 491 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 492 } 493 sa1_cache_clean_addr = sa1_cc_base; 494 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 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 pmap_link_l2pt(l1pagetable, 0x00000000, 516 &kernel_pt_table[KERNEL_PT_SYS]); 517 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 518 &kernel_pt_table[KERNEL_PT_KERNEL]); 519 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 520 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 521 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 522 pmap_link_l2pt(l1pagetable, PTE_BASE, 523 &kernel_ptpt); 524 525 /* update the top of the kernel VM */ 526 pmap_curmaxkvaddr = 527 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 528 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 529 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 530 &kernel_pt_table[KERNEL_PT_IO]); 531 532 533 #ifdef VERBOSE_INIT_ARM 534 printf("Mapping kernel\n"); 535 #endif 536 537 /* Now we fill in the L2 pagetable for the kernel code/data */ 538 539 /* 540 * XXX there is no ELF header to find RO region. 541 * XXX What should we do? 542 */ 543 #if 0 544 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 545 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 546 physical_start, kernexec->a_text, 547 VM_PROT_READ, PTE_CACHE); 548 logical += pmap_map_chunk(l1pagetable, 549 KERNEL_TEXT_BASE + logical, physical_start + logical, 550 kerneldatasize - kernexec->a_text, 551 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 552 } else 553 #endif 554 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 555 KERNEL_TEXT_BASE, kerneldatasize, 556 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 557 558 #ifdef VERBOSE_INIT_ARM 559 printf("Constructing L2 page tables\n"); 560 #endif 561 562 /* Map the stack pages */ 563 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 564 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 565 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 566 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 567 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 568 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 570 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 572 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 573 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 574 575 /* Map the page table that maps the kernel pages */ 576 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 577 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 578 579 /* Map a page for entering idle mode */ 580 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 582 583 /* 584 * Map entries in the page table used to map PTE's 585 * Basically every kernel page table gets mapped here 586 */ 587 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 588 pmap_map_entry(l1pagetable, 589 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 590 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 pmap_map_entry(l1pagetable, 593 PTE_BASE + (KERNEL_BASE >> (PGSHIFT-2)), 594 kernel_pt_table[KERNEL_PT_KERNEL].pv_pa, 595 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 596 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 597 pmap_map_entry(l1pagetable, 598 PTE_BASE + ((KERNEL_VM_BASE + 599 (loop * 0x00400000)) >> (PGSHIFT-2)), 600 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 601 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 602 } 603 pmap_map_entry(l1pagetable, 604 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 605 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 606 pmap_map_entry(l1pagetable, 607 PTE_BASE + (SAIPIO_BASE >> (PGSHIFT-2)), 608 kernel_pt_table[KERNEL_PT_IO].pv_pa, VM_PROT_READ|VM_PROT_WRITE, 609 PTE_CACHE); 610 611 /* Map the vector page. */ 612 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 613 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 614 615 /* Map any I/O modules here, as we don't have real bus_space_map() */ 616 printf("mapping IO..."); 617 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 618 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 619 620 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 621 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 622 /* 623 * Now we have the real page tables in place so we can switch to them. 624 * Once this is done we will be running with the REAL kernel page 625 * tables. 626 */ 627 628 printf("done.\n"); 629 630 /* 631 * Pages were allocated during the secondary bootstrap for the 632 * stacks for different CPU modes. 633 * We must now set the r13 registers in the different CPU modes to 634 * point to these stacks. 635 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 636 * of the stack memory. 637 */ 638 printf("init subsystems: stacks "); 639 640 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 641 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 642 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 643 #ifdef PMAP_DEBUG 644 if (pmap_debug_level >= 0) 645 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 646 kernelstack.pv_pa); 647 #endif /* PMAP_DEBUG */ 648 649 /* 650 * Well we should set a data abort handler. 651 * Once things get going this will change as we will need a proper 652 * handler. Until then we will use a handler that just panics but 653 * tells us why. 654 * Initialisation of the vectors will just panic on a data abort. 655 * This just fills in a slighly better one. 656 */ 657 printf("vectors "); 658 data_abort_handler_address = (u_int)data_abort_handler; 659 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 660 undefined_handler_address = (u_int)undefinedinstruction_bounce; 661 printf("%08x %08x %08x\n", data_abort_handler_address, 662 prefetch_abort_handler_address, undefined_handler_address); 663 664 /* Initialise the undefined instruction handlers */ 665 printf("undefined "); 666 undefined_init(); 667 668 /* Set the page table address. */ 669 setttb(kernel_l1pt.pv_pa); 670 671 #ifdef BOOT_DUMP 672 dumppages((char *)0xc0000000, 16 * NBPG); 673 dumppages((char *)0xb0100000, 64); /* XXX */ 674 #endif 675 /* Enable MMU, I-cache, D-cache, write buffer. */ 676 cpufunc_control(0x337f, 0x107d); 677 678 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 679 680 consinit(); 681 682 #ifdef VERBOSE_INIT_ARM 683 printf("freemempos=%08lx\n", freemempos); 684 printf("MMU enabled. control=%08x\n", cpu_get_control()); 685 #endif 686 687 /* Load memory into UVM. */ 688 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 689 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 690 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 691 paddr_t end = start + (bootconfig.dram[loop].pages * NBPG); 692 693 if (start < physical_freestart) 694 start = physical_freestart; 695 if (end > physical_freeend) 696 end = physical_freeend; 697 698 uvm_page_physload(atop(start), atop(end), 699 atop(start), atop(end), VM_FREELIST_DEFAULT); 700 } 701 702 /* Boot strap pmap telling it where the kernel page table is */ 703 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 704 705 706 if (cputype == CPU_ID_SA110) 707 rpc_sa110_cc_setup(); 708 709 #ifdef IPKDB 710 /* Initialise ipkdb */ 711 ipkdb_init(); 712 if (boothowto & RB_KDB) 713 ipkdb_connect(0); 714 #endif /* NIPKDB */ 715 716 #ifdef BOOT_DUMP 717 dumppages((char *)kernel_l1pt.pv_va, 16); 718 dumppages((char *)PTE_BASE, 16); 719 #endif 720 721 #ifdef DDB 722 { 723 static struct undefined_handler uh; 724 725 uh.uh_handler = db_trapper; 726 install_coproc_handler_static(0, &uh); 727 } 728 ddb_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 += NBPG) { 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