1 /* $NetBSD: hpc_machdep.c,v 1.54 2002/08/24 02:16:34 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_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 extern int db_trapper(); 205 206 extern void dump_spl_masks __P((void)); 207 208 extern void dumpsys __P((void)); 209 210 /* 211 * void cpu_reboot(int howto, char *bootstr) 212 * 213 * Reboots the system 214 * 215 * Deal with any syncing, unmounting, dumping and shutdown hooks, 216 * then reset the CPU. 217 */ 218 219 void 220 cpu_reboot(howto, bootstr) 221 int howto; 222 char *bootstr; 223 { 224 /* 225 * If we are still cold then hit the air brakes 226 * and crash to earth fast 227 */ 228 if (cold) { 229 doshutdownhooks(); 230 printf("Halted while still in the ICE age.\n"); 231 printf("The operating system has halted.\n"); 232 printf("Please press any key to reboot.\n\n"); 233 cngetc(); 234 printf("rebooting...\n"); 235 cpu_reset(); 236 /*NOTREACHED*/ 237 } 238 239 /* Disable console buffering */ 240 cnpollc(1); 241 242 /* 243 * If RB_NOSYNC was not specified sync the discs. 244 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 245 * It looks like syslogd is getting woken up only to find that it cannot 246 * page part of the binary in as the filesystem has been unmounted. 247 */ 248 if (!(howto & RB_NOSYNC)) 249 bootsync(); 250 251 /* Say NO to interrupts */ 252 splhigh(); 253 254 /* Do a dump if requested. */ 255 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 256 dumpsys(); 257 258 259 /* Run any shutdown hooks */ 260 doshutdownhooks(); 261 262 /* Make sure IRQ's are disabled */ 263 IRQdisable; 264 265 if (howto & RB_HALT) { 266 printf("The operating system has halted.\n"); 267 printf("Please press any key to reboot.\n\n"); 268 cngetc(); 269 } 270 271 printf("rebooting...\n"); 272 cpu_reset(); 273 /*NOTREACHED*/ 274 } 275 276 /* 277 * 278 * Initial entry point on startup. This gets called before main() is 279 * entered. 280 * It should be responsible for setting up everything that must be 281 * in place when main is called. 282 * This includes 283 * Taking a copy of the boot configuration structure. 284 * Initialising the physical console so characters can be printed. 285 * Setting up page tables for the kernel 286 */ 287 288 u_int 289 initarm(argc, argv, bi) 290 int argc; 291 char **argv; 292 struct bootinfo *bi; 293 { 294 int loop; 295 u_int kerneldatasize, symbolsize; 296 u_int l1pagetable; 297 vaddr_t freemempos; 298 pv_addr_t kernel_l1pt; 299 pv_addr_t kernel_ptpt; 300 #ifdef DDB 301 Elf_Shdr *sh; 302 #endif 303 304 /* 305 * Heads up ... Setup the CPU / MMU / TLB functions 306 */ 307 set_cpufuncs(); 308 309 #ifdef DEBUG_BEFOREMMU 310 /* 311 * At this point, we cannot call real consinit(). 312 * Just call a faked up version of consinit(), which does the thing 313 * with MMU disabled. 314 */ 315 fakecninit(); 316 #endif 317 318 /* 319 * XXX for now, overwrite bootconfig to hardcoded values. 320 * XXX kill bootconfig and directly call uvm_physload 321 */ 322 bootconfig.dram[0].address = 0xc0000000; 323 bootconfig.dram[0].pages = 8192; 324 bootconfig.dramblocks = 1; 325 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 326 327 symbolsize = 0; 328 #ifdef DDB 329 if (! memcmp(&end, "\177ELF", 4)) { 330 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 331 loop = ((Elf_Ehdr *)&end)->e_shnum; 332 for(; loop; loop--, sh++) 333 if (sh->sh_offset > 0 && 334 (sh->sh_offset + sh->sh_size) > symbolsize) 335 symbolsize = sh->sh_offset + sh->sh_size; 336 } 337 #endif 338 339 printf("kernsize=0x%x\n", kerneldatasize); 340 kerneldatasize += symbolsize; 341 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 342 343 /* parse kernel args */ 344 boot_file[0] = '\0'; 345 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 346 for(argc--, argv++; argc; argc--, argv++) 347 switch(**argv) { 348 case 'a': 349 boothowto |= RB_ASKNAME; 350 break; 351 case 's': 352 boothowto |= RB_SINGLE; 353 break; 354 case 'b': 355 /* boot device: -b=sd0 etc. */ 356 #ifdef NFS 357 if (strcmp(*argv + 2, "nfs") == 0) 358 mountroot = nfs_mountroot; 359 else 360 strncpy(boot_file, *argv + 2, 361 sizeof(boot_file)); 362 #else /* NFS */ 363 strncpy(boot_file, *argv + 2, sizeof(boot_file)); 364 #endif /* NFS */ 365 break; 366 default: 367 break; 368 } 369 370 /* copy bootinfo into known kernel space */ 371 bootinfo_storage = *bi; 372 bootinfo = &bootinfo_storage; 373 374 #ifdef BOOTINFO_FB_WIDTH 375 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 376 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 377 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 378 bootinfo->fb_type = BOOTINFO_FB_TYPE; 379 #endif 380 381 /* 382 * hpcboot has loaded me with MMU disabled. 383 * So create kernel page tables and enable MMU 384 */ 385 386 /* 387 * Set up the variables that define the availablilty of physcial 388 * memory 389 */ 390 physical_start = bootconfig.dram[0].address; 391 physical_freestart = physical_start 392 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 393 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 394 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 395 physical_freeend = physical_end; 396 /* free_pages = bootconfig.drampages;*/ 397 398 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 399 physmem += bootconfig.dram[loop].pages; 400 401 /* XXX handle UMA framebuffer memory */ 402 403 /* Use the first 1MB to allocate things */ 404 freemempos = 0xc0000000; 405 memset((void *)0xc0000000, 0, KERNEL_TEXT_BASE - 0xc0000000); 406 407 /* 408 * Right We have the bottom meg of memory mapped to 0x00000000 409 * so was can get at it. The kernel will ocupy the start of it. 410 * After the kernel/args we allocate some of the fixed page tables 411 * we need to get the system going. 412 * We allocate one page directory and 8 page tables and store the 413 * physical addresses in the kernel_pt_table array. 414 * Must remember that neither the page L1 or L2 page tables are the 415 * same size as a page ! 416 * 417 * Ok the next bit of physical allocate may look complex but it is 418 * simple really. I have done it like this so that no memory gets 419 * wasted during the allocate of various pages and tables that are 420 * all different sizes. 421 * The start address will be page aligned. 422 * We allocate the kernel page directory on the first free 16KB 423 * boundry we find. 424 * We allocate the kernel page tables on the first 1KB boundry we find. 425 * We allocate 9 PT's. This means that in the process we 426 * KNOW that we will encounter at least 1 16KB boundry. 427 * 428 * Eventually if the top end of the memory gets used for process L1 429 * page tables the kernel L1 page table may be moved up there. 430 */ 431 432 #ifdef VERBOSE_INIT_ARM 433 printf("Allocating page tables\n"); 434 #endif 435 436 /* Define a macro to simplify memory allocation */ 437 #define valloc_pages(var, np) \ 438 (var).pv_pa = (var).pv_va = freemempos; \ 439 freemempos += (np) * NBPG; 440 #define alloc_pages(var, np) \ 441 (var) = freemempos; \ 442 freemempos += (np) * NBPG; 443 444 445 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 446 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 447 alloc_pages(kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE / NBPG); 448 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 449 } 450 451 /* 452 * Allocate a page for the system page mapped to V0x00000000 453 * This page will just contain the system vectors and can be 454 * shared by all processes. 455 */ 456 valloc_pages(systempage, 1); 457 458 /* Allocate a page for the page table to map kernel page tables*/ 459 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 460 461 /* Allocate stacks for all modes */ 462 valloc_pages(irqstack, IRQ_STACK_SIZE); 463 valloc_pages(abtstack, ABT_STACK_SIZE); 464 valloc_pages(undstack, UND_STACK_SIZE); 465 valloc_pages(kernelstack, UPAGES); 466 467 #ifdef VERBOSE_INIT_ARM 468 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 469 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 470 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 471 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 472 #endif 473 474 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 475 476 /* 477 * XXX Actually, we only need virtual space and don't need 478 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 479 */ 480 /* 481 * XXX totally stuffed hack to work round problems introduced 482 * in recent versions of the pmap code. Due to the calls used there 483 * we cannot allocate virtual memory during bootstrap. 484 */ 485 for(;;) { 486 alloc_pages(sa1_cc_base, 1); 487 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 488 break; 489 } 490 { 491 vaddr_t dummy; 492 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 493 } 494 sa1_cache_clean_addr = sa1_cc_base; 495 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 496 497 alloc_pages(sa11x0_idle_mem, 1); 498 499 /* 500 * Ok we have allocated physical pages for the primary kernel 501 * page tables 502 */ 503 504 #ifdef VERBOSE_INIT_ARM 505 printf("Creating L1 page table\n"); 506 #endif 507 508 /* 509 * Now we start consturction of the L1 page table 510 * We start by mapping the L2 page tables into the L1. 511 * This means that we can replace L1 mappings later on if necessary 512 */ 513 l1pagetable = kernel_l1pt.pv_pa; 514 515 /* Map the L2 pages tables in the L1 page table */ 516 pmap_link_l2pt(l1pagetable, 0x00000000, 517 &kernel_pt_table[KERNEL_PT_SYS]); 518 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 519 &kernel_pt_table[KERNEL_PT_KERNEL]); 520 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 521 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 522 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 523 pmap_link_l2pt(l1pagetable, PTE_BASE, 524 &kernel_ptpt); 525 526 /* update the top of the kernel VM */ 527 pmap_curmaxkvaddr = 528 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 529 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 530 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 531 &kernel_pt_table[KERNEL_PT_IO]); 532 533 534 #ifdef VERBOSE_INIT_ARM 535 printf("Mapping kernel\n"); 536 #endif 537 538 /* Now we fill in the L2 pagetable for the kernel code/data */ 539 540 /* 541 * XXX there is no ELF header to find RO region. 542 * XXX What should we do? 543 */ 544 #if 0 545 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 546 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 547 physical_start, kernexec->a_text, 548 VM_PROT_READ, PTE_CACHE); 549 logical += pmap_map_chunk(l1pagetable, 550 KERNEL_TEXT_BASE + logical, physical_start + logical, 551 kerneldatasize - kernexec->a_text, 552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 } else 554 #endif 555 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 556 KERNEL_TEXT_BASE, kerneldatasize, 557 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 558 559 #ifdef VERBOSE_INIT_ARM 560 printf("Constructing L2 page tables\n"); 561 #endif 562 563 /* Map the stack pages */ 564 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 565 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 567 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 568 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 569 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 570 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 571 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 572 573 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 574 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 /* Map the page table that maps the kernel pages */ 577 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 578 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 579 580 /* Map a page for entering idle mode */ 581 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 582 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 583 584 /* 585 * Map entries in the page table used to map PTE's 586 * Basically every kernel page table gets mapped here 587 */ 588 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 589 pmap_map_entry(l1pagetable, 590 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 591 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 592 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 593 pmap_map_entry(l1pagetable, 594 PTE_BASE + (KERNEL_BASE >> (PGSHIFT-2)), 595 kernel_pt_table[KERNEL_PT_KERNEL].pv_pa, 596 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 597 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 598 pmap_map_entry(l1pagetable, 599 PTE_BASE + ((KERNEL_VM_BASE + 600 (loop * 0x00400000)) >> (PGSHIFT-2)), 601 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 602 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 603 } 604 pmap_map_entry(l1pagetable, 605 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 606 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 607 pmap_map_entry(l1pagetable, 608 PTE_BASE + (SAIPIO_BASE >> (PGSHIFT-2)), 609 kernel_pt_table[KERNEL_PT_IO].pv_pa, VM_PROT_READ|VM_PROT_WRITE, 610 PTE_CACHE); 611 612 /* Map the vector page. */ 613 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 614 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 615 616 /* Map any I/O modules here, as we don't have real bus_space_map() */ 617 printf("mapping IO..."); 618 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 619 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 620 621 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 622 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 /* 624 * Now we have the real page tables in place so we can switch to them. 625 * Once this is done we will be running with the REAL kernel page 626 * tables. 627 */ 628 629 printf("done.\n"); 630 631 /* 632 * Pages were allocated during the secondary bootstrap for the 633 * stacks for different CPU modes. 634 * We must now set the r13 registers in the different CPU modes to 635 * point to these stacks. 636 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 637 * of the stack memory. 638 */ 639 printf("init subsystems: stacks "); 640 641 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 642 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 643 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 644 #ifdef PMAP_DEBUG 645 if (pmap_debug_level >= 0) 646 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 647 kernelstack.pv_pa); 648 #endif /* PMAP_DEBUG */ 649 650 /* 651 * Well we should set a data abort handler. 652 * Once things get going this will change as we will need a proper 653 * handler. Until then we will use a handler that just panics but 654 * tells us why. 655 * Initialisation of the vectors will just panic on a data abort. 656 * This just fills in a slighly better one. 657 */ 658 printf("vectors "); 659 data_abort_handler_address = (u_int)data_abort_handler; 660 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 661 undefined_handler_address = (u_int)undefinedinstruction_bounce; 662 printf("%08x %08x %08x\n", data_abort_handler_address, 663 prefetch_abort_handler_address, undefined_handler_address); 664 665 /* Initialise the undefined instruction handlers */ 666 printf("undefined "); 667 undefined_init(); 668 669 /* Set the page table address. */ 670 setttb(kernel_l1pt.pv_pa); 671 672 #ifdef BOOT_DUMP 673 dumppages((char *)0xc0000000, 16 * NBPG); 674 dumppages((char *)0xb0100000, 64); /* XXX */ 675 #endif 676 /* Enable MMU, I-cache, D-cache, write buffer. */ 677 cpufunc_control(0x337f, 0x107d); 678 679 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 680 681 consinit(); 682 683 #ifdef VERBOSE_INIT_ARM 684 printf("freemempos=%08lx\n", freemempos); 685 printf("MMU enabled. control=%08x\n", cpu_get_control()); 686 #endif 687 688 /* Load memory into UVM. */ 689 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 690 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 691 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 692 paddr_t end = start + (bootconfig.dram[loop].pages * NBPG); 693 694 if (start < physical_freestart) 695 start = physical_freestart; 696 if (end > physical_freeend) 697 end = physical_freeend; 698 699 uvm_page_physload(atop(start), atop(end), 700 atop(start), atop(end), VM_FREELIST_DEFAULT); 701 } 702 703 /* Boot strap pmap telling it where the kernel page table is */ 704 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 705 706 707 if (cputype == CPU_ID_SA110) 708 rpc_sa110_cc_setup(); 709 710 #ifdef IPKDB 711 /* Initialise ipkdb */ 712 ipkdb_init(); 713 if (boothowto & RB_KDB) 714 ipkdb_connect(0); 715 #endif /* NIPKDB */ 716 717 #ifdef BOOT_DUMP 718 dumppages((char *)kernel_l1pt.pv_va, 16); 719 dumppages((char *)PTE_BASE, 16); 720 #endif 721 722 #ifdef DDB 723 { 724 static struct undefined_handler uh; 725 726 uh.uh_handler = db_trapper; 727 install_coproc_handler_static(0, &uh); 728 } 729 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 730 #endif 731 732 printf("kernsize=0x%x", kerneldatasize); 733 printf(" (including 0x%x symbols)\n", symbolsize); 734 735 #ifdef DDB 736 if (boothowto & RB_KDB) 737 Debugger(); 738 #endif /* DDB */ 739 740 if (bootinfo->magic == BOOTINFO_MAGIC) { 741 platid.dw.dw0 = bootinfo->platid_cpu; 742 platid.dw.dw1 = bootinfo->platid_machine; 743 } 744 745 /* We return the new stack pointer address */ 746 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 747 } 748 749 void 750 consinit(void) 751 { 752 static int consinit_called = 0; 753 754 if (consinit_called != 0) 755 return; 756 757 consinit_called = 1; 758 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 759 cninit(); 760 else { 761 /* 762 * Nothing to do here. Console initialization is done at 763 * autoconf device attach time. 764 */ 765 } 766 } 767 768 #ifdef DEBUG_BEFOREMMU 769 cons_decl(sacom); 770 void 771 fakecninit() 772 { 773 static struct consdev fakecntab = cons_init(sacom); 774 cn_tab = &fakecntab; 775 776 (*cn_tab->cn_init)(0); 777 cn_tab->cn_pri = CN_REMOTE; 778 } 779 #endif 780 781 782 /* 783 * For optimal cache cleaning we need two 16K banks of 784 * virtual address space that NOTHING else will access 785 * and then we alternate the cache cleaning between the 786 * two banks. 787 * The cache cleaning code requires requires 2 banks aligned 788 * on total size boundry so the banks can be alternated by 789 * eorring the size bit (assumes the bank size is a power of 2) 790 */ 791 void 792 rpc_sa110_cc_setup(void) 793 { 794 int loop; 795 paddr_t kaddr; 796 pt_entry_t *pte; 797 798 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 799 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) { 800 pte = vtopte(sa1_cc_base + loop); 801 *pte = L2_S_PROTO | kaddr | 802 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 803 PTE_SYNC(pte); 804 } 805 sa1_cache_clean_addr = sa1_cc_base; 806 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 807 } 808 809 #ifdef BOOT_DUMP 810 void dumppages(char *start, int nbytes) 811 { 812 char *p = start; 813 char *p1; 814 int i; 815 816 for(i = nbytes; i > 0; i -= 16, p += 16) { 817 for(p1 = p + 15; p != p1; p1--) { 818 if (*p1) 819 break; 820 } 821 if (! *p1) 822 continue; 823 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 824 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 825 (unsigned int)p, 826 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 827 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 828 } 829 } 830 #endif 831 832 /* End of machdep.c */ 833