1 /* $NetBSD: hpc_machdep.c,v 1.47 2002/05/03 16:45:23 rjs 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 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 166 extern unsigned int sa1_cache_clean_addr; 167 extern unsigned int sa1_cache_clean_size; 168 static vaddr_t sa1_cc_base; 169 170 /* Non-buffered non-cachable memory needed to enter idle mode */ 171 extern vaddr_t sa11x0_idle_mem; 172 173 /* Prototypes */ 174 175 void physcon_display_base __P((u_int addr)); 176 void consinit __P((void)); 177 178 void data_abort_handler __P((trapframe_t *frame)); 179 void prefetch_abort_handler __P((trapframe_t *frame)); 180 void undefinedinstruction_bounce __P((trapframe_t *frame)); 181 182 u_int cpu_get_control __P((void)); 183 184 void rpc_sa110_cc_setup(void); 185 186 #ifdef DEBUG_BEFOREMMU 187 static void fakecninit(); 188 #endif 189 190 #ifdef BOOT_DUMP 191 void dumppages(char *, int); 192 #endif 193 194 extern int db_trapper(); 195 196 extern void dump_spl_masks __P((void)); 197 198 extern void dumpsys __P((void)); 199 200 /* 201 * void cpu_reboot(int howto, char *bootstr) 202 * 203 * Reboots the system 204 * 205 * Deal with any syncing, unmounting, dumping and shutdown hooks, 206 * then reset the CPU. 207 */ 208 209 void 210 cpu_reboot(howto, bootstr) 211 int howto; 212 char *bootstr; 213 { 214 /* 215 * If we are still cold then hit the air brakes 216 * and crash to earth fast 217 */ 218 if (cold) { 219 doshutdownhooks(); 220 printf("Halted while still in the ICE age.\n"); 221 printf("The operating system has halted.\n"); 222 printf("Please press any key to reboot.\n\n"); 223 cngetc(); 224 printf("rebooting...\n"); 225 cpu_reset(); 226 /*NOTREACHED*/ 227 } 228 229 /* Disable console buffering */ 230 cnpollc(1); 231 232 /* 233 * If RB_NOSYNC was not specified sync the discs. 234 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 235 * It looks like syslogd is getting woken up only to find that it cannot 236 * page part of the binary in as the filesystem has been unmounted. 237 */ 238 if (!(howto & RB_NOSYNC)) 239 bootsync(); 240 241 /* Say NO to interrupts */ 242 splhigh(); 243 244 /* Do a dump if requested. */ 245 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 246 dumpsys(); 247 248 249 /* Run any shutdown hooks */ 250 doshutdownhooks(); 251 252 /* Make sure IRQ's are disabled */ 253 IRQdisable; 254 255 if (howto & RB_HALT) { 256 printf("The operating system has halted.\n"); 257 printf("Please press any key to reboot.\n\n"); 258 cngetc(); 259 } 260 261 printf("rebooting...\n"); 262 cpu_reset(); 263 /*NOTREACHED*/ 264 } 265 266 /* 267 * 268 * Initial entry point on startup. This gets called before main() is 269 * entered. 270 * It should be responsible for setting up everything that must be 271 * in place when main is called. 272 * This includes 273 * Taking a copy of the boot configuration structure. 274 * Initialising the physical console so characters can be printed. 275 * Setting up page tables for the kernel 276 */ 277 278 u_int 279 initarm(argc, argv, bi) 280 int argc; 281 char **argv; 282 struct bootinfo *bi; 283 { 284 int loop; 285 u_int kerneldatasize, symbolsize; 286 u_int l1pagetable; 287 vaddr_t freemempos; 288 pv_addr_t kernel_l1pt; 289 pv_addr_t kernel_ptpt; 290 #ifdef DDB 291 Elf_Shdr *sh; 292 #endif 293 294 /* 295 * Heads up ... Setup the CPU / MMU / TLB functions 296 */ 297 set_cpufuncs(); 298 299 #ifdef DEBUG_BEFOREMMU 300 /* 301 * At this point, we cannot call real consinit(). 302 * Just call a faked up version of consinit(), which does the thing 303 * with MMU disabled. 304 */ 305 fakecninit(); 306 #endif 307 308 /* 309 * XXX for now, overwrite bootconfig to hardcoded values. 310 * XXX kill bootconfig and directly call uvm_physload 311 */ 312 bootconfig.dram[0].address = 0xc0000000; 313 bootconfig.dram[0].pages = 8192; 314 bootconfig.dramblocks = 1; 315 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 316 317 symbolsize = 0; 318 #ifdef DDB 319 if (! memcmp(&end, "\177ELF", 4)) { 320 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 321 loop = ((Elf_Ehdr *)&end)->e_shnum; 322 for(; loop; loop--, sh++) 323 if (sh->sh_offset > 0 && 324 (sh->sh_offset + sh->sh_size) > symbolsize) 325 symbolsize = sh->sh_offset + sh->sh_size; 326 } 327 #endif 328 329 printf("kernsize=0x%x\n", kerneldatasize); 330 kerneldatasize += symbolsize; 331 kerneldatasize = ((kerneldatasize - 1) & ~(NBPG * 4 - 1)) + NBPG * 8; 332 333 /* parse kernel args */ 334 strncpy(booted_kernel_storage, *argv, sizeof(booted_kernel_storage)); 335 for(argc--, argv++; argc; argc--, argv++) 336 switch(**argv) { 337 case 'a': 338 boothowto |= RB_ASKNAME; 339 break; 340 case 's': 341 boothowto |= RB_SINGLE; 342 break; 343 default: 344 break; 345 } 346 347 /* copy bootinfo into known kernel space */ 348 bootinfo_storage = *bi; 349 bootinfo = &bootinfo_storage; 350 351 #ifdef BOOTINFO_FB_WIDTH 352 bootinfo->fb_line_bytes = BOOTINFO_FB_LINE_BYTES; 353 bootinfo->fb_width = BOOTINFO_FB_WIDTH; 354 bootinfo->fb_height = BOOTINFO_FB_HEIGHT; 355 bootinfo->fb_type = BOOTINFO_FB_TYPE; 356 #endif 357 358 /* 359 * hpcboot has loaded me with MMU disabled. 360 * So create kernel page tables and enable MMU 361 */ 362 363 /* 364 * Set up the variables that define the availablilty of physcial 365 * memory 366 */ 367 physical_start = bootconfig.dram[0].address; 368 physical_freestart = physical_start 369 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 370 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 371 + bootconfig.dram[bootconfig.dramblocks - 1].pages * NBPG; 372 physical_freeend = physical_end; 373 /* free_pages = bootconfig.drampages;*/ 374 375 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 376 physmem += bootconfig.dram[loop].pages; 377 378 /* XXX handle UMA framebuffer memory */ 379 380 /* Use the first 1MB to allocate things */ 381 freemempos = 0xc0000000; 382 memset((void *)0xc0000000, 0, KERNEL_TEXT_BASE - 0xc0000000); 383 384 /* 385 * Right We have the bottom meg of memory mapped to 0x00000000 386 * so was can get at it. The kernel will ocupy the start of it. 387 * After the kernel/args we allocate some of the fixed page tables 388 * we need to get the system going. 389 * We allocate one page directory and 8 page tables and store the 390 * physical addresses in the kernel_pt_table array. 391 * Must remember that neither the page L1 or L2 page tables are the 392 * same size as a page ! 393 * 394 * Ok the next bit of physical allocate may look complex but it is 395 * simple really. I have done it like this so that no memory gets 396 * wasted during the allocate of various pages and tables that are 397 * all different sizes. 398 * The start address will be page aligned. 399 * We allocate the kernel page directory on the first free 16KB 400 * boundry we find. 401 * We allocate the kernel page tables on the first 1KB boundry we find. 402 * We allocate 9 PT's. This means that in the process we 403 * KNOW that we will encounter at least 1 16KB boundry. 404 * 405 * Eventually if the top end of the memory gets used for process L1 406 * page tables the kernel L1 page table may be moved up there. 407 */ 408 409 #ifdef VERBOSE_INIT_ARM 410 printf("Allocating page tables\n"); 411 #endif 412 413 /* Define a macro to simplify memory allocation */ 414 #define valloc_pages(var, np) \ 415 (var).pv_pa = (var).pv_va = freemempos; \ 416 freemempos += (np) * NBPG; 417 #define alloc_pages(var, np) \ 418 (var) = freemempos; \ 419 freemempos += (np) * NBPG; 420 421 422 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 423 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 424 alloc_pages(kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE / NBPG); 425 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 426 } 427 428 /* 429 * Allocate a page for the system page mapped to V0x00000000 430 * This page will just contain the system vectors and can be 431 * shared by all processes. 432 */ 433 valloc_pages(systempage, 1); 434 435 /* Allocate a page for the page table to map kernel page tables*/ 436 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 437 438 /* Allocate stacks for all modes */ 439 valloc_pages(irqstack, IRQ_STACK_SIZE); 440 valloc_pages(abtstack, ABT_STACK_SIZE); 441 valloc_pages(undstack, UND_STACK_SIZE); 442 valloc_pages(kernelstack, UPAGES); 443 444 #ifdef VERBOSE_INIT_ARM 445 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 446 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 447 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 448 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 449 #endif 450 451 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 452 453 /* 454 * XXX Actually, we only need virtual space and don't need 455 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 456 */ 457 /* 458 * XXX totally stuffed hack to work round problems introduced 459 * in recent versions of the pmap code. Due to the calls used there 460 * we cannot allocate virtual memory during bootstrap. 461 */ 462 for(;;) { 463 alloc_pages(sa1_cc_base, 1); 464 if (! (sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 465 break; 466 } 467 { 468 vaddr_t dummy; 469 alloc_pages(dummy, CPU_SA110_CACHE_CLEAN_SIZE / NBPG - 1); 470 } 471 sa1_cache_clean_addr = sa1_cc_base; 472 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 473 474 alloc_pages(sa11x0_idle_mem, 1); 475 476 /* 477 * Ok we have allocated physical pages for the primary kernel 478 * page tables 479 */ 480 481 #ifdef VERBOSE_INIT_ARM 482 printf("Creating L1 page table\n"); 483 #endif 484 485 /* 486 * Now we start consturction of the L1 page table 487 * We start by mapping the L2 page tables into the L1. 488 * This means that we can replace L1 mappings later on if necessary 489 */ 490 l1pagetable = kernel_l1pt.pv_pa; 491 492 /* Map the L2 pages tables in the L1 page table */ 493 pmap_link_l2pt(l1pagetable, 0x00000000, 494 &kernel_pt_table[KERNEL_PT_SYS]); 495 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 496 &kernel_pt_table[KERNEL_PT_KERNEL]); 497 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 498 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 499 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 500 pmap_link_l2pt(l1pagetable, PTE_BASE, 501 &kernel_ptpt); 502 503 /* update the top of the kernel VM */ 504 pmap_curmaxkvaddr = 505 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 506 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 507 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 508 &kernel_pt_table[KERNEL_PT_IO]); 509 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("Mapping kernel\n"); 513 #endif 514 515 /* Now we fill in the L2 pagetable for the kernel code/data */ 516 517 /* 518 * XXX there is no ELF header to find RO region. 519 * XXX What should we do? 520 */ 521 #if 0 522 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 523 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 524 physical_start, kernexec->a_text, 525 VM_PROT_READ, PTE_CACHE); 526 logical += pmap_map_chunk(l1pagetable, 527 KERNEL_TEXT_BASE + logical, physical_start + logical, 528 kerneldatasize - kernexec->a_text, 529 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 530 } else 531 #endif 532 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 533 KERNEL_TEXT_BASE, kerneldatasize, 534 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("Constructing L2 page tables\n"); 538 #endif 539 540 /* Map the stack pages */ 541 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 542 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 543 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 544 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 545 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 546 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 547 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 548 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 549 550 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 551 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 552 553 /* Map the page table that maps the kernel pages */ 554 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 555 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 556 557 /* Map a page for entering idle mode */ 558 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 559 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 560 561 /* 562 * Map entries in the page table used to map PTE's 563 * Basically every kernel page table gets mapped here 564 */ 565 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 566 pmap_map_entry(l1pagetable, 567 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 568 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 569 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 570 pmap_map_entry(l1pagetable, 571 PTE_BASE + (KERNEL_BASE >> (PGSHIFT-2)), 572 kernel_pt_table[KERNEL_PT_KERNEL].pv_pa, 573 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 574 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) { 575 pmap_map_entry(l1pagetable, 576 PTE_BASE + ((KERNEL_VM_BASE + 577 (loop * 0x00400000)) >> (PGSHIFT-2)), 578 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 579 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 580 } 581 pmap_map_entry(l1pagetable, 582 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 583 kernel_ptpt.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 584 pmap_map_entry(l1pagetable, 585 PTE_BASE + (SAIPIO_BASE >> (PGSHIFT-2)), 586 kernel_pt_table[KERNEL_PT_IO].pv_pa, VM_PROT_READ|VM_PROT_WRITE, 587 PTE_NOCACHE); 588 589 /* Map the vector page. */ 590 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 591 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 592 593 /* Map any I/O modules here, as we don't have real bus_space_map() */ 594 printf("mapping IO..."); 595 pmap_map_entry(l1pagetable, SACOM3_BASE, SACOM3_HW_BASE, 596 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 597 598 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 599 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 600 /* 601 * Now we have the real page tables in place so we can switch to them. 602 * Once this is done we will be running with the REAL kernel page 603 * tables. 604 */ 605 606 printf("done.\n"); 607 608 /* 609 * Pages were allocated during the secondary bootstrap for the 610 * stacks for different CPU modes. 611 * We must now set the r13 registers in the different CPU modes to 612 * point to these stacks. 613 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 614 * of the stack memory. 615 */ 616 printf("init subsystems: stacks "); 617 618 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 619 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 620 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 621 #ifdef PMAP_DEBUG 622 if (pmap_debug_level >= 0) 623 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 624 kernelstack.pv_pa); 625 #endif /* PMAP_DEBUG */ 626 627 /* 628 * Well we should set a data abort handler. 629 * Once things get going this will change as we will need a proper 630 * handler. Until then we will use a handler that just panics but 631 * tells us why. 632 * Initialisation of the vectors will just panic on a data abort. 633 * This just fills in a slighly better one. 634 */ 635 printf("vectors "); 636 data_abort_handler_address = (u_int)data_abort_handler; 637 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 638 undefined_handler_address = (u_int)undefinedinstruction_bounce; 639 printf("%08x %08x %08x\n", data_abort_handler_address, 640 prefetch_abort_handler_address, undefined_handler_address); 641 642 /* Initialise the undefined instruction handlers */ 643 printf("undefined "); 644 undefined_init(); 645 646 /* Set the page table address. */ 647 setttb(kernel_l1pt.pv_pa); 648 649 #ifdef BOOT_DUMP 650 dumppages((char *)0xc0000000, 16 * NBPG); 651 dumppages((char *)0xb0100000, 64); /* XXX */ 652 #endif 653 /* Enable MMU, I-cache, D-cache, write buffer. */ 654 cpufunc_control(0x337f, 0x107d); 655 656 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 657 658 consinit(); 659 660 #ifdef VERBOSE_INIT_ARM 661 printf("freemempos=%08lx\n", freemempos); 662 printf("MMU enabled. control=%08x\n", cpu_get_control()); 663 #endif 664 665 /* Boot strap pmap telling it where the kernel page table is */ 666 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 667 668 669 if (cputype == CPU_ID_SA110) 670 rpc_sa110_cc_setup(); 671 672 #ifdef IPKDB 673 /* Initialise ipkdb */ 674 ipkdb_init(); 675 if (boothowto & RB_KDB) 676 ipkdb_connect(0); 677 #endif /* NIPKDB */ 678 679 #ifdef BOOT_DUMP 680 dumppages((char *)kernel_l1pt.pv_va, 16); 681 dumppages((char *)PTE_BASE, 16); 682 #endif 683 684 #ifdef DDB 685 { 686 static struct undefined_handler uh; 687 688 uh.uh_handler = db_trapper; 689 install_coproc_handler_static(0, &uh); 690 } 691 ddb_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 692 #endif 693 694 printf("kernsize=0x%x", kerneldatasize); 695 printf(" (including 0x%x symbols)\n", symbolsize); 696 697 #ifdef DDB 698 if (boothowto & RB_KDB) 699 Debugger(); 700 #endif /* DDB */ 701 702 if (bootinfo->magic == BOOTINFO_MAGIC) { 703 platid.dw.dw0 = bootinfo->platid_cpu; 704 platid.dw.dw1 = bootinfo->platid_machine; 705 } 706 707 /* We return the new stack pointer address */ 708 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 709 } 710 711 void 712 consinit(void) 713 { 714 static int consinit_called = 0; 715 716 if (consinit_called != 0) 717 return; 718 719 consinit_called = 1; 720 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) 721 cninit(); 722 else { 723 /* 724 * Nothing to do here. Console initialization is done at 725 * autoconf device attach time. 726 */ 727 } 728 } 729 730 #ifdef DEBUG_BEFOREMMU 731 cons_decl(sacom); 732 void 733 fakecninit() 734 { 735 static struct consdev fakecntab = cons_init(sacom); 736 cn_tab = &fakecntab; 737 738 (*cn_tab->cn_init)(0); 739 cn_tab->cn_pri = CN_REMOTE; 740 } 741 #endif 742 743 744 /* 745 * For optimal cache cleaning we need two 16K banks of 746 * virtual address space that NOTHING else will access 747 * and then we alternate the cache cleaning between the 748 * two banks. 749 * The cache cleaning code requires requires 2 banks aligned 750 * on total size boundry so the banks can be alternated by 751 * eorring the size bit (assumes the bank size is a power of 2) 752 */ 753 void 754 rpc_sa110_cc_setup(void) 755 { 756 int loop; 757 paddr_t kaddr; 758 pt_entry_t *pte; 759 760 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 761 for (loop = 0; loop < CPU_SA110_CACHE_CLEAN_SIZE; loop += NBPG) { 762 pte = vtopte(sa1_cc_base + loop); 763 *pte = L2_S_PROTO | kaddr | 764 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 765 } 766 sa1_cache_clean_addr = sa1_cc_base; 767 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 768 } 769 770 #ifdef BOOT_DUMP 771 void dumppages(char *start, int nbytes) 772 { 773 char *p = start; 774 char *p1; 775 int i; 776 777 for(i = nbytes; i > 0; i -= 16, p += 16) { 778 for(p1 = p + 15; p != p1; p1--) { 779 if (*p1) 780 break; 781 } 782 if (! *p1) 783 continue; 784 printf("%08x %02x %02x %02x %02x %02x %02x %02x %02x" 785 " %02x %02x %02x %02x %02x %02x %02x %02x\n", 786 (unsigned int)p, 787 p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7], 788 p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]); 789 } 790 } 791 #endif 792 793 /* End of machdep.c */ 794