1 /* $NetBSD: hpc_machdep.c,v 1.46 2002/04/12 18:50:33 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 54 #include <sys/param.h> 55 #include <sys/systm.h> 56 #include <sys/kernel.h> 57 #include <sys/reboot.h> 58 #include <sys/proc.h> 59 #include <sys/msgbuf.h> 60 #include <sys/exec.h> 61 62 #include <dev/cons.h> 63 64 #ifdef DDB 65 #include <machine/db_machdep.h> 66 #include <ddb/db_sym.h> 67 #include <ddb/db_extern.h> 68 #ifndef DB_ELFSIZE 69 #error Must define DB_ELFSIZE! 70 #endif 71 #define ELFSIZE DB_ELFSIZE 72 #include <sys/exec_elf.h> 73 #endif 74 75 #include <uvm/uvm.h> 76 77 #include <machine/signal.h> 78 #include <machine/frame.h> 79 #include <machine/bootconfig.h> 80 #include <machine/cpu.h> 81 #include <machine/io.h> 82 #include <machine/intr.h> 83 #include <arm/arm32/katelib.h> 84 #include <machine/bootinfo.h> 85 #include <arm/cpuconf.h> 86 #include <arm/undefined.h> 87 #include <machine/rtc.h> 88 #include <machine/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 4 /* start with 16MB of KVM */ 159 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 160 161 pv_addr_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 data_abort_handler __P((trapframe_t *frame)); 181 void prefetch_abort_handler __P((trapframe_t *frame)); 182 void undefinedinstruction_bounce __P((trapframe_t *frame)); 183 184 u_int cpu_get_control __P((void)); 185 186 void rpc_sa110_cc_setup(void); 187 188 #ifdef DEBUG_BEFOREMMU 189 static void fakecninit(); 190 #endif 191 192 #ifdef BOOT_DUMP 193 void dumppages(char *, int); 194 #endif 195 196 extern int db_trapper(); 197 198 extern void dump_spl_masks __P((void)); 199 200 extern void dumpsys __P((void)); 201 202 /* 203 * void cpu_reboot(int howto, char *bootstr) 204 * 205 * Reboots the system 206 * 207 * Deal with any syncing, unmounting, dumping and shutdown hooks, 208 * then reset the CPU. 209 */ 210 211 void 212 cpu_reboot(howto, bootstr) 213 int howto; 214 char *bootstr; 215 { 216 /* 217 * If we are still cold then hit the air brakes 218 * and crash to earth fast 219 */ 220 if (cold) { 221 doshutdownhooks(); 222 printf("Halted while still in the ICE age.\n"); 223 printf("The operating system has halted.\n"); 224 printf("Please press any key to reboot.\n\n"); 225 cngetc(); 226 printf("rebooting...\n"); 227 cpu_reset(); 228 /*NOTREACHED*/ 229 } 230 231 /* Disable console buffering */ 232 cnpollc(1); 233 234 /* 235 * If RB_NOSYNC was not specified sync the discs. 236 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 237 * It looks like syslogd is getting woken up only to find that it cannot 238 * page part of the binary in as the filesystem has been unmounted. 239 */ 240 if (!(howto & RB_NOSYNC)) 241 bootsync(); 242 243 /* Say NO to interrupts */ 244 splhigh(); 245 246 /* Do a dump if requested. */ 247 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 248 dumpsys(); 249 250 251 /* Run any shutdown hooks */ 252 doshutdownhooks(); 253 254 /* Make sure IRQ's are disabled */ 255 IRQdisable; 256 257 if (howto & RB_HALT) { 258 printf("The operating system has halted.\n"); 259 printf("Please press any key to reboot.\n\n"); 260 cngetc(); 261 } 262 263 printf("rebooting...\n"); 264 cpu_reset(); 265 /*NOTREACHED*/ 266 } 267 268 /* 269 * 270 * Initial entry point on startup. This gets called before main() is 271 * entered. 272 * It should be responsible for setting up everything that must be 273 * in place when main is called. 274 * This includes 275 * Taking a copy of the boot configuration structure. 276 * Initialising the physical console so characters can be printed. 277 * Setting up page tables for the kernel 278 */ 279 280 u_int 281 initarm(argc, argv, bi) 282 int argc; 283 char **argv; 284 struct bootinfo *bi; 285 { 286 int loop; 287 u_int kerneldatasize, symbolsize; 288 u_int l1pagetable; 289 vaddr_t freemempos; 290 pv_addr_t kernel_l1pt; 291 pv_addr_t kernel_ptpt; 292 #ifdef DDB 293 Elf_Shdr *sh; 294 #endif 295 296 /* 297 * Heads up ... Setup the CPU / MMU / TLB functions 298 */ 299 set_cpufuncs(); 300 301 #ifdef DEBUG_BEFOREMMU 302 /* 303 * At this point, we cannot call real consinit(). 304 * Just call a faked up version of consinit(), which does the thing 305 * with MMU disabled. 306 */ 307 fakecninit(); 308 #endif 309 310 /* 311 * XXX for now, overwrite bootconfig to hardcoded values. 312 * XXX kill bootconfig and directly call uvm_physload 313 */ 314 bootconfig.dram[0].address = 0xc0000000; 315 bootconfig.dram[0].pages = 8192; 316 bootconfig.dramblocks = 1; 317 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 318 319 symbolsize = 0; 320 #ifdef DDB 321 if (! memcmp(&end, "\177ELF", 4)) { 322 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 323 loop = ((Elf_Ehdr *)&end)->e_shnum; 324 for(; loop; loop--, sh++) 325 if (sh->sh_offset > 0 && 326 (sh->sh_offset + sh->sh_size) > symbolsize) 327 symbolsize = sh->sh_offset + sh->sh_size; 328 } 329 #endif 330 331 printf("kernsize=0x%x\n", kerneldatasize); 332 kerneldatasize += symbolsize; 333 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 334 335 /* parse kernel args */ 336 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 337 for(argc--, argv++; argc; argc--, argv++) 338 switch(**argv) { 339 case 'a': 340 boothowto |= RB_ASKNAME; 341 break; 342 case 's': 343 boothowto |= RB_SINGLE; 344 break; 345 default: 346 break; 347 } 348 349 /* copy bootinfo into known kernel space */ 350 bootinfo_storage = *bi; 351 bootinfo = &bootinfo_storage; 352 353 #ifdef BOOTINFO_FB_WIDTH 354 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 355 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 356 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 357 bootinfo->fb_type = BOOTINFO_FB_TYPE; 358 #endif 359 360 /* 361 * hpcboot has loaded me with MMU disabled. 362 * So create kernel page tables and enable MMU 363 */ 364 365 /* 366 * Set up the variables that define the availablilty of physcial 367 * memory 368 */ 369 physical_start = bootconfig.dram[0].address; 370 physical_freestart = physical_start 371 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 372 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 373 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 374 physical_freeend = physical_end; 375 /* free_pages = bootconfig.drampages;*/ 376 377 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 378 physmem += bootconfig.dram[loop].pages; 379 380 /* XXX handle UMA framebuffer memory */ 381 382 /* Use the first 1MB to allocate things */ 383 freemempos = 0xc0000000; 384 memset((void *)0xc0000000, 0, KERNEL_TEXT_BASE - 0xc0000000); 385 386 /* 387 * Right We have the bottom meg of memory mapped to 0x00000000 388 * so was can get at it. The kernel will ocupy the start of it. 389 * After the kernel/args we allocate some of the fixed page tables 390 * we need to get the system going. 391 * We allocate one page directory and 8 page tables and store the 392 * physical addresses in the kernel_pt_table array. 393 * Must remember that neither the page L1 or L2 page tables are the 394 * same size as a page ! 395 * 396 * Ok the next bit of physical allocate may look complex but it is 397 * simple really. I have done it like this so that no memory gets 398 * wasted during the allocate of various pages and tables that are 399 * all different sizes. 400 * The start address will be page aligned. 401 * We allocate the kernel page directory on the first free 16KB 402 * boundry we find. 403 * We allocate the kernel page tables on the first 1KB boundry we find. 404 * We allocate 9 PT's. This means that in the process we 405 * KNOW that we will encounter at least 1 16KB boundry. 406 * 407 * Eventually if the top end of the memory gets used for process L1 408 * page tables the kernel L1 page table may be moved up there. 409 */ 410 411 #ifdef VERBOSE_INIT_ARM 412 printf("Allocating page tables\n"); 413 #endif 414 415 /* Define a macro to simplify memory allocation */ 416 #define valloc_pages(var, np) \ 417 (var).pv_pa = (var).pv_va = freemempos; \ 418 freemempos += (np) * NBPG; 419 #define alloc_pages(var, np) \ 420 (var) = freemempos; \ 421 freemempos += (np) * NBPG; 422 423 424 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 425 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 426 alloc_pages(kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE / NBPG); 427 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 428 } 429 430 /* 431 * Allocate a page for the system page mapped to V0x00000000 432 * This page will just contain the system vectors and can be 433 * shared by all processes. 434 */ 435 valloc_pages(systempage, 1); 436 437 /* Allocate a page for the page table to map kernel page tables*/ 438 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 439 440 /* Allocate stacks for all modes */ 441 valloc_pages(irqstack, IRQ_STACK_SIZE); 442 valloc_pages(abtstack, ABT_STACK_SIZE); 443 valloc_pages(undstack, UND_STACK_SIZE); 444 valloc_pages(kernelstack, UPAGES); 445 446 #ifdef VERBOSE_INIT_ARM 447 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 448 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 449 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 450 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 451 #endif 452 453 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 454 455 /* 456 * XXX Actually, we only need virtual space and don't need 457 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 458 */ 459 #ifdef CPU_SA110 460 /* 461 * XXX totally stuffed hack to work round problems introduced 462 * in recent versions of the pmap code. Due to the calls used there 463 * we cannot allocate virtual memory during bootstrap. 464 */ 465 for(;;) { 466 alloc_pages(sa110_cc_base, 1); 467 if (! (sa110_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 468 break; 469 } 470 { 471 vaddr_t dummy; 472 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 473 } 474 sa110_cache_clean_addr = sa110_cc_base; 475 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 476 #endif /* CPU_SA110 */ 477 478 alloc_pages(sa11x0_idle_mem, 1); 479 480 /* 481 * Ok we have allocated physical pages for the primary kernel 482 * page tables 483 */ 484 485 #ifdef VERBOSE_INIT_ARM 486 printf("Creating L1 page table\n"); 487 #endif 488 489 /* 490 * Now we start consturction of the L1 page table 491 * We start by mapping the L2 page tables into the L1. 492 * This means that we can replace L1 mappings later on if necessary 493 */ 494 l1pagetable = kernel_l1pt.pv_pa; 495 496 /* Map the L2 pages tables in the L1 page table */ 497 pmap_link_l2pt(l1pagetable, 0x00000000, 498 &kernel_pt_table[KERNEL_PT_SYS]); 499 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 500 &kernel_pt_table[KERNEL_PT_KERNEL]); 501 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 502 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 503 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 504 pmap_link_l2pt(l1pagetable, PTE_BASE, 505 &kernel_ptpt); 506 507 /* update the top of the kernel VM */ 508 pmap_curmaxkvaddr = 509 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 510 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 511 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 512 &kernel_pt_table[KERNEL_PT_IO]); 513 514 515 #ifdef VERBOSE_INIT_ARM 516 printf("Mapping kernel\n"); 517 #endif 518 519 /* Now we fill in the L2 pagetable for the kernel code/data */ 520 521 /* 522 * XXX there is no ELF header to find RO region. 523 * XXX What should we do? 524 */ 525 #if 0 526 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 527 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 528 physical_start, kernexec->a_text, 529 VM_PROT_READ, PTE_CACHE); 530 logical += pmap_map_chunk(l1pagetable, 531 KERNEL_TEXT_BASE + logical, physical_start + logical, 532 kerneldatasize - kernexec->a_text, 533 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 534 } else 535 #endif 536 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 537 KERNEL_TEXT_BASE, kerneldatasize, 538 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("Constructing L2 page tables\n"); 542 #endif 543 544 /* Map the stack pages */ 545 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 546 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 547 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 548 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 549 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 550 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 551 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 552 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 554 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 555 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 556 557 /* Map the page table that maps the kernel pages */ 558 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 559 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 560 561 /* Map a page for entering idle mode */ 562 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 563 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 564 565 /* 566 * Map entries in the page table used to map PTE's 567 * Basically every kernel page table gets mapped here 568 */ 569 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 570 pmap_map_entry(l1pagetable, 571 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 572 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 573 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 574 pmap_map_entry(l1pagetable, 575 PTE_BASE + (KERNEL_BASE >> (PGSHIFT-2)), 576 kernel_pt_table[KERNEL_PT_KERNEL].pv_pa, 577 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 578 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 579 pmap_map_entry(l1pagetable, 580 PTE_BASE + ((KERNEL_VM_BASE + 581 (loop * 0x00400000)) >> (PGSHIFT-2)), 582 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 583 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 584 } 585 pmap_map_entry(l1pagetable, 586 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 587 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 588 pmap_map_entry(l1pagetable, 589 PTE_BASE + (SAIPIO_BASE >> (PGSHIFT-2)), 590 kernel_pt_table[KERNEL_PT_IO].pv_pa, VM_PROT_READ|VM_PROT_WRITE, 591 PTE_NOCACHE); 592 593 /* Map the vector page. */ 594 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 595 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 596 597 /* Map any I/O modules here, as we don't have real bus_space_map() */ 598 printf("mapping IO..."); 599 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 600 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 601 602 #ifdef CPU_SA110 603 pmap_map_chunk(l1pagetable, sa110_cache_clean_addr, 0xe0000000, 604 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 605 #endif 606 /* 607 * Now we have the real page tables in place so we can switch to them. 608 * Once this is done we will be running with the REAL kernel page 609 * tables. 610 */ 611 612 printf("done.\n"); 613 614 /* 615 * Pages were allocated during the secondary bootstrap for the 616 * stacks for different CPU modes. 617 * We must now set the r13 registers in the different CPU modes to 618 * point to these stacks. 619 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 620 * of the stack memory. 621 */ 622 printf("init subsystems: stacks "); 623 624 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 625 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 626 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 627 #ifdef PMAP_DEBUG 628 if (pmap_debug_level >= 0) 629 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 630 kernelstack.pv_pa); 631 #endif /* PMAP_DEBUG */ 632 633 /* 634 * Well we should set a data abort handler. 635 * Once things get going this will change as we will need a proper 636 * handler. Until then we will use a handler that just panics but 637 * tells us why. 638 * Initialisation of the vectors will just panic on a data abort. 639 * This just fills in a slighly better one. 640 */ 641 printf("vectors "); 642 data_abort_handler_address = (u_int)data_abort_handler; 643 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 644 undefined_handler_address = (u_int)undefinedinstruction_bounce; 645 printf("%08x %08x %08x\n", data_abort_handler_address, 646 prefetch_abort_handler_address, undefined_handler_address); 647 648 /* Initialise the undefined instruction handlers */ 649 printf("undefined "); 650 undefined_init(); 651 652 /* Set the page table address. */ 653 setttb(kernel_l1pt.pv_pa); 654 655 #ifdef BOOT_DUMP 656 dumppages((char *)0xc0000000, 16 * NBPG); 657 dumppages((char *)0xb0100000, 64); /* XXX */ 658 #endif 659 /* Enable MMU, I-cache, D-cache, write buffer. */ 660 cpufunc_control(0x337f, 0x107d); 661 662 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 663 664 consinit(); 665 666 #ifdef VERBOSE_INIT_ARM 667 printf("freemempos=%08lx\n", freemempos); 668 printf("MMU enabled. control=%08x\n", cpu_get_control()); 669 #endif 670 671 /* Boot strap pmap telling it where the kernel page table is */ 672 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 673 674 675 #ifdef CPU_SA110 676 if (cputype == CPU_ID_SA110) 677 rpc_sa110_cc_setup(); 678 #endif /* CPU_SA110 */ 679 680 #ifdef IPKDB 681 /* Initialise ipkdb */ 682 ipkdb_init(); 683 if (boothowto & RB_KDB) 684 ipkdb_connect(0); 685 #endif /* NIPKDB */ 686 687 #ifdef BOOT_DUMP 688 dumppages((char *)kernel_l1pt.pv_va, 16); 689 dumppages((char *)PTE_BASE, 16); 690 #endif 691 692 #ifdef DDB 693 { 694 static struct undefined_handler uh; 695 696 uh.uh_handler = db_trapper; 697 install_coproc_handler_static(0, &uh); 698 } 699 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 700 #endif 701 702 printf("kernsize=0x%x", kerneldatasize); 703 printf(" (including 0x%x symbols)\n", symbolsize); 704 705 #ifdef DDB 706 if (boothowto & RB_KDB) 707 Debugger(); 708 #endif /* DDB */ 709 710 if (bootinfo->magic == BOOTINFO_MAGIC) { 711 platid.dw.dw0 = bootinfo->platid_cpu; 712 platid.dw.dw1 = bootinfo->platid_machine; 713 } 714 715 /* We return the new stack pointer address */ 716 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 717 } 718 719 void 720 consinit(void) 721 { 722 static int consinit_called = 0; 723 724 if (consinit_called != 0) 725 return; 726 727 consinit_called = 1; 728 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 729 cninit(); 730 else { 731 /* 732 * Nothing to do here. Console initialization is done at 733 * autoconf device attach time. 734 */ 735 } 736 } 737 738 #ifdef DEBUG_BEFOREMMU 739 cons_decl(sacom); 740 void 741 fakecninit() 742 { 743 static struct consdev fakecntab = cons_init(sacom); 744 cn_tab = &fakecntab; 745 746 (*cn_tab->cn_init)(0); 747 cn_tab->cn_pri = CN_REMOTE; 748 } 749 #endif 750 751 #ifdef CPU_SA110 752 753 /* 754 * For optimal cache cleaning we need two 16K banks of 755 * virtual address space that NOTHING else will access 756 * and then we alternate the cache cleaning between the 757 * two banks. 758 * The cache cleaning code requires requires 2 banks aligned 759 * on total size boundry so the banks can be alternated by 760 * eorring the size bit (assumes the bank size is a power of 2) 761 */ 762 void 763 rpc_sa110_cc_setup(void) 764 { 765 int loop; 766 paddr_t kaddr; 767 pt_entry_t *pte; 768 769 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 770 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) { 771 pte = vtopte(sa110_cc_base + loop); 772 *pte = L2_S_PROTO | kaddr | 773 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 774 } 775 sa110_cache_clean_addr = sa110_cc_base; 776 sa110_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 777 } 778 #endif /* CPU_SA110 */ 779 780 #ifdef BOOT_DUMP 781 void dumppages(char *start, int nbytes) 782 { 783 char *p = start; 784 char *p1; 785 int i; 786 787 for(i = nbytes; i > 0; i -= 16, p += 16) { 788 for(p1 = p + 15; p != p1; p1--) { 789 if (*p1) 790 break; 791 } 792 if (! *p1) 793 continue; 794 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 795 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 796 (unsigned int)p, 797 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 798 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 799 } 800 } 801 #endif 802 803 /* End of machdep.c */ 804