1 /* $NetBSD: cats_machdep.c,v 1.37 2002/11/03 21:43:31 chris Exp $ */ 2 3 /* 4 * Copyright (c) 1997,1998 Mark Brinicombe. 5 * Copyright (c) 1997,1998 Causality Limited. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Mark Brinicombe 19 * for the NetBSD Project. 20 * 4. The name of the company nor the name of the author may be used to 21 * endorse or promote products derived from this software without specific 22 * prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * Machine dependant functions for kernel setup for EBSA285 core architecture 37 * using cyclone firmware 38 * 39 * Created : 24/11/97 40 */ 41 42 #include "opt_ddb.h" 43 #include "opt_pmap_debug.h" 44 45 #include "isadma.h" 46 47 #include <sys/param.h> 48 #include <sys/device.h> 49 #include <sys/systm.h> 50 #include <sys/kernel.h> 51 #include <sys/exec.h> 52 #include <sys/proc.h> 53 #include <sys/msgbuf.h> 54 #include <sys/reboot.h> 55 #include <sys/termios.h> 56 57 #include <dev/cons.h> 58 59 #include <machine/db_machdep.h> 60 #include <ddb/db_sym.h> 61 #include <ddb/db_extern.h> 62 63 #include <machine/bootconfig.h> 64 #define _ARM32_BUS_DMA_PRIVATE 65 #include <machine/bus.h> 66 #include <machine/cpu.h> 67 #include <machine/frame.h> 68 #include <machine/intr.h> 69 #include <arm/undefined.h> 70 #include <arm/arm32/machdep.h> 71 72 #include <machine/cyclone_boot.h> 73 #include <arm/footbridge/dc21285mem.h> 74 #include <arm/footbridge/dc21285reg.h> 75 76 #include "opt_ipkdb.h" 77 78 #include "isa.h" 79 #if NISA > 0 80 #include <dev/isa/isareg.h> 81 #include <dev/isa/isavar.h> 82 #endif 83 84 85 /* 86 * Address to call from cpu_reset() to reset the machine. 87 * This is machine architecture dependant as it varies depending 88 * on where the ROM appears when you turn the MMU off. 89 */ 90 91 u_int cpu_reset_address = DC21285_ROM_BASE; 92 93 u_int dc21285_fclk = FCLK; 94 95 /* Define various stack sizes in pages */ 96 #define IRQ_STACK_SIZE 1 97 #define ABT_STACK_SIZE 1 98 #ifdef IPKDB 99 #define UND_STACK_SIZE 2 100 #else 101 #define UND_STACK_SIZE 1 102 #endif 103 104 struct ebsaboot ebsabootinfo; 105 BootConfig bootconfig; /* Boot config storage */ 106 static char bootargs[MAX_BOOT_STRING + 1]; 107 char *boot_args = NULL; 108 char *boot_file = NULL; 109 110 vm_offset_t physical_start; 111 vm_offset_t physical_freestart; 112 vm_offset_t physical_freeend; 113 vm_offset_t physical_end; 114 u_int free_pages; 115 vm_offset_t pagetables_start; 116 int physmem = 0; 117 118 /*int debug_flags;*/ 119 #ifndef PMAP_STATIC_L1S 120 int max_processes = 64; /* Default number */ 121 #endif /* !PMAP_STATIC_L1S */ 122 123 /* Physical and virtual addresses for some global pages */ 124 pv_addr_t systempage; 125 pv_addr_t irqstack; 126 pv_addr_t undstack; 127 pv_addr_t abtstack; 128 pv_addr_t kernelstack; 129 130 vm_offset_t msgbufphys; 131 132 extern u_int data_abort_handler_address; 133 extern u_int prefetch_abort_handler_address; 134 extern u_int undefined_handler_address; 135 136 #ifdef PMAP_DEBUG 137 extern int pmap_debug_level; 138 #endif 139 140 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 141 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 142 #define KERNEL_PT_KERNEL_NUM 2 143 144 /* now this could move into something more generic */ 145 /* L2 tables for mapping kernel VM */ 146 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 147 #define KERNEL_PT_VMDATA_NUM 4 /* 16MB kernel VM !*/ 148 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 149 150 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 151 152 struct user *proc0paddr; 153 154 /* Prototypes */ 155 156 void consinit __P((void)); 157 158 int fcomcnattach __P((u_int iobase, int rate,tcflag_t cflag)); 159 int fcomcndetach __P((void)); 160 161 static void process_kernel_args __P((char *)); 162 extern void configure __P((void)); 163 164 /* A load of console goo. */ 165 #include "vga.h" 166 #if (NVGA > 0) 167 #include <dev/ic/mc6845reg.h> 168 #include <dev/ic/pcdisplayvar.h> 169 #include <dev/ic/vgareg.h> 170 #include <dev/ic/vgavar.h> 171 #endif 172 173 #include "pckbc.h" 174 #if (NPCKBC > 0) 175 #include <dev/ic/i8042reg.h> 176 #include <dev/ic/pckbcvar.h> 177 #endif 178 179 #include "com.h" 180 #if (NCOM > 0) 181 #include <dev/ic/comreg.h> 182 #include <dev/ic/comvar.h> 183 #ifndef CONCOMADDR 184 #define CONCOMADDR 0x3f8 185 #endif 186 #endif 187 188 #ifndef CONSDEVNAME 189 #define CONSDEVNAME "vga" 190 #endif 191 192 #define CONSPEED B38400 193 #ifndef CONSPEED 194 #define CONSPEED B9600 /* TTYDEF_SPEED */ 195 #endif 196 #ifndef CONMODE 197 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 198 #endif 199 200 int comcnspeed = CONSPEED; 201 int comcnmode = CONMODE; 202 203 204 /* 205 * void cpu_reboot(int howto, char *bootstr) 206 * 207 * Reboots the system 208 * 209 * Deal with any syncing, unmounting, dumping and shutdown hooks, 210 * then reset the CPU. 211 */ 212 213 void 214 cpu_reboot(howto, bootstr) 215 int howto; 216 char *bootstr; 217 { 218 #ifdef DIAGNOSTIC 219 /* info */ 220 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 221 #endif 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("The operating system has halted.\n"); 230 printf("Please press any key to reboot.\n\n"); 231 cngetc(); 232 printf("rebooting...\n"); 233 cpu_reset(); 234 /*NOTREACHED*/ 235 } 236 237 /* Disable console buffering */ 238 /* cnpollc(1);*/ 239 240 /* 241 * If RB_NOSYNC was not specified sync the discs. 242 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 243 * It looks like syslogd is getting woken up only to find that it cannot 244 * page part of the binary in as the filesystem has been unmounted. 245 */ 246 if (!(howto & RB_NOSYNC)) 247 bootsync(); 248 249 /* Say NO to interrupts */ 250 splhigh(); 251 252 /* Do a dump if requested. */ 253 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 254 dumpsys(); 255 256 /* Run any shutdown hooks */ 257 doshutdownhooks(); 258 259 /* Make sure IRQ's are disabled */ 260 IRQdisable; 261 262 if (howto & RB_HALT) { 263 printf("The operating system has halted.\n"); 264 printf("Please press any key to reboot.\n\n"); 265 cngetc(); 266 } 267 268 printf("rebooting...\n"); 269 cpu_reset(); 270 /*NOTREACHED*/ 271 } 272 273 /* 274 * Mapping table for core kernel memory. This memory is mapped at init 275 * time with section mappings. 276 */ 277 struct l1_sec_map { 278 vm_offset_t va; 279 vm_offset_t pa; 280 vm_size_t size; 281 vm_prot_t prot; 282 int cache; 283 } l1_sec_table[] = { 284 /* Map 1MB for CSR space */ 285 { DC21285_ARMCSR_VBASE, DC21285_ARMCSR_BASE, 286 DC21285_ARMCSR_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 287 PTE_NOCACHE }, 288 289 /* Map 1MB for fast cache cleaning space */ 290 { DC21285_CACHE_FLUSH_VBASE, DC21285_SA_CACHE_FLUSH_BASE, 291 DC21285_CACHE_FLUSH_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 292 PTE_CACHE }, 293 294 /* Map 1MB for PCI IO space */ 295 { DC21285_PCI_IO_VBASE, DC21285_PCI_IO_BASE, 296 DC21285_PCI_IO_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 297 PTE_NOCACHE }, 298 299 /* Map 1MB for PCI IACK space */ 300 { DC21285_PCI_IACK_VBASE, DC21285_PCI_IACK_SPECIAL, 301 DC21285_PCI_IACK_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 302 PTE_NOCACHE }, 303 304 /* Map 16MB of type 1 PCI config access */ 305 { DC21285_PCI_TYPE_1_CONFIG_VBASE, DC21285_PCI_TYPE_1_CONFIG, 306 DC21285_PCI_TYPE_1_CONFIG_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 307 PTE_NOCACHE }, 308 309 /* Map 16MB of type 0 PCI config access */ 310 { DC21285_PCI_TYPE_0_CONFIG_VBASE, DC21285_PCI_TYPE_0_CONFIG, 311 DC21285_PCI_TYPE_0_CONFIG_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE }, 313 314 /* Map 1MB of 32 bit PCI address space for ISA MEM accesses via PCI */ 315 { DC21285_PCI_ISA_MEM_VBASE, DC21285_PCI_MEM_BASE, 316 DC21285_PCI_ISA_MEM_VSIZE, VM_PROT_READ|VM_PROT_WRITE, 317 PTE_NOCACHE }, 318 319 { 0, 0, 0, 0, 0 } 320 }; 321 322 /* 323 * u_int initarm(struct ebsaboot *bootinfo) 324 * 325 * Initial entry point on startup. This gets called before main() is 326 * entered. 327 * It should be responsible for setting up everything that must be 328 * in place when main is called. 329 * This includes 330 * Taking a copy of the boot configuration structure. 331 * Initialising the physical console so characters can be printed. 332 * Setting up page tables for the kernel 333 * Relocating the kernel to the bottom of physical memory 334 */ 335 336 u_int 337 initarm(bootargs) 338 void *bootargs; 339 { 340 struct ebsaboot *bootinfo = bootargs; 341 int loop; 342 int loop1; 343 u_int logical; 344 u_int l1pagetable; 345 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE; 346 pv_addr_t kernel_l1pt; 347 pv_addr_t kernel_ptpt; 348 349 /* 350 * Heads up ... Setup the CPU / MMU / TLB functions 351 */ 352 set_cpufuncs(); 353 354 /* Copy the boot configuration structure */ 355 ebsabootinfo = *bootinfo; 356 357 if (ebsabootinfo.bt_fclk >= 50000000 358 && ebsabootinfo.bt_fclk <= 66000000) 359 dc21285_fclk = ebsabootinfo.bt_fclk; 360 361 /* Fake bootconfig structure for the benefit of pmap.c */ 362 /* XXX must make the memory description h/w independant */ 363 bootconfig.dramblocks = 1; 364 bootconfig.dram[0].address = ebsabootinfo.bt_memstart; 365 bootconfig.dram[0].pages = (ebsabootinfo.bt_memend 366 - ebsabootinfo.bt_memstart) / NBPG; 367 368 /* 369 * Initialise the diagnostic serial console 370 * This allows a means of generating output during initarm(). 371 * Once all the memory map changes are complete we can call consinit() 372 * and not have to worry about things moving. 373 */ 374 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode);*/ 375 376 /* Talk to the user */ 377 printf("NetBSD/cats booting ...\n"); 378 379 if (ebsabootinfo.bt_magic != BT_MAGIC_NUMBER_EBSA 380 && ebsabootinfo.bt_magic != BT_MAGIC_NUMBER_CATS) 381 panic("Incompatible magic number passed in boot args"); 382 383 /* { 384 int loop; 385 for (loop = 0; loop < 8; ++loop) { 386 printf("%08x\n", *(((int *)bootinfo)+loop)); 387 } 388 }*/ 389 390 /* 391 * Ok we have the following memory map 392 * 393 * virtual address == physical address apart from the areas: 394 * 0x00000000 -> 0x000fffff which is mapped to 395 * top 1MB of physical memory 396 * 0x00100000 -> 0x0fffffff which is mapped to 397 * physical addresses 0x00100000 -> 0x0fffffff 398 * 0x10000000 -> 0x1fffffff which is mapped to 399 * physical addresses 0x00000000 -> 0x0fffffff 400 * 0x20000000 -> 0xefffffff which is mapped to 401 * physical addresses 0x20000000 -> 0xefffffff 402 * 0xf0000000 -> 0xf03fffff which is mapped to 403 * physical addresses 0x00000000 -> 0x003fffff 404 * 405 * This means that the kernel is mapped suitably for continuing 406 * execution, all I/O is mapped 1:1 virtual to physical and 407 * physical memory is accessible. 408 * 409 * The initarm() has the responsibility for creating the kernel 410 * page tables. 411 * It must also set up various memory pointers that are used 412 * by pmap etc. 413 */ 414 415 /* 416 * Examine the boot args string for options we need to know about 417 * now. 418 */ 419 process_kernel_args((char *)ebsabootinfo.bt_args); 420 421 printf("initarm: Configuring system ...\n"); 422 423 /* 424 * Set up the variables that define the availablilty of 425 * physical memory 426 */ 427 physical_start = ebsabootinfo.bt_memstart; 428 physical_freestart = physical_start; 429 physical_end = ebsabootinfo.bt_memend; 430 physical_freeend = physical_end; 431 free_pages = (physical_end - physical_start) / NBPG; 432 433 physmem = (physical_end - physical_start) / NBPG; 434 435 /* Tell the user about the memory */ 436 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 437 physical_start, physical_end - 1); 438 439 /* 440 * Ok the kernel occupies the bottom of physical memory. 441 * The first free page after the kernel can be found in 442 * ebsabootinfo->bt_memavail 443 * We now need to allocate some fixed page tables to get the kernel 444 * going. 445 * We allocate one page directory and a number page tables and store 446 * the physical addresses in the kernel_pt_table array. 447 * 448 * Ok the next bit of physical allocation may look complex but it is 449 * simple really. I have done it like this so that no memory gets 450 * wasted during the allocation of various pages and tables that are 451 * all different sizes. 452 * The start addresses will be page aligned. 453 * We allocate the kernel page directory on the first free 16KB boundry 454 * we find. 455 * We allocate the kernel page tables on the first 4KB boundry we find. 456 * Since we allocate at least 3 L2 pagetables we know that we must 457 * encounter at least one 16KB aligned address. 458 */ 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("Allocating page tables\n"); 462 #endif 463 464 /* Update the address of the first free page of physical memory */ 465 physical_freestart = ebsabootinfo.bt_memavail; 466 free_pages -= (physical_freestart - physical_start) / NBPG; 467 468 /* Define a macro to simplify memory allocation */ 469 #define valloc_pages(var, np) \ 470 alloc_pages((var).pv_pa, (np)); \ 471 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 472 473 #define alloc_pages(var, np) \ 474 (var) = physical_freestart; \ 475 physical_freestart += ((np) * NBPG); \ 476 free_pages -= (np); \ 477 memset((char *)(var), 0, ((np) * NBPG)); 478 479 loop1 = 0; 480 kernel_l1pt.pv_pa = 0; 481 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 482 /* Are we 16KB aligned for an L1 ? */ 483 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 484 && kernel_l1pt.pv_pa == 0) { 485 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / NBPG); 486 } else { 487 alloc_pages(kernel_pt_table[loop1].pv_pa, 488 L2_TABLE_SIZE / NBPG); 489 kernel_pt_table[loop1].pv_va = 490 kernel_pt_table[loop1].pv_pa; 491 ++loop1; 492 } 493 } 494 495 #ifdef DIAGNOSTIC 496 /* This should never be able to happen but better confirm that. */ 497 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 498 panic("initarm: Failed to align the kernel page directory"); 499 #endif 500 501 /* 502 * Allocate a page for the system page mapped to V0x00000000 503 * This page will just contain the system vectors and can be 504 * shared by all processes. 505 */ 506 alloc_pages(systempage.pv_pa, 1); 507 508 /* Allocate a page for the page table to map kernel page tables*/ 509 valloc_pages(kernel_ptpt, L2_TABLE_SIZE / NBPG); 510 511 /* Allocate stacks for all modes */ 512 valloc_pages(irqstack, IRQ_STACK_SIZE); 513 valloc_pages(abtstack, ABT_STACK_SIZE); 514 valloc_pages(undstack, UND_STACK_SIZE); 515 valloc_pages(kernelstack, UPAGES); 516 517 #ifdef VERBOSE_INIT_ARM 518 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 519 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 520 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 521 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 522 #endif 523 524 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 525 526 /* 527 * Ok we have allocated physical pages for the primary kernel 528 * page tables 529 */ 530 531 #ifdef VERBOSE_INIT_ARM 532 printf("Creating L1 page table\n"); 533 #endif 534 535 /* 536 * Now we start consturction of the L1 page table 537 * We start by mapping the L2 page tables into the L1. 538 * This means that we can replace L1 mappings later on if necessary 539 */ 540 l1pagetable = kernel_l1pt.pv_pa; 541 542 /* Map the L2 pages tables in the L1 page table */ 543 pmap_link_l2pt(l1pagetable, 0x00000000, 544 &kernel_pt_table[KERNEL_PT_SYS]); 545 546 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 547 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 548 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 549 550 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 551 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 552 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 553 554 /* update the top of the kernel VM */ 555 pmap_curmaxkvaddr = 556 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 557 558 pmap_link_l2pt(l1pagetable, PTE_BASE, &kernel_ptpt); 559 560 #ifdef VERBOSE_INIT_ARM 561 printf("Mapping kernel\n"); 562 #endif 563 564 /* Now we fill in the L2 pagetable for the kernel static code/data */ 565 566 if (N_GETMAGIC(kernexec[0]) != ZMAGIC) 567 panic("Illegal kernel format"); 568 else { 569 extern int end; 570 571 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 572 physical_start, kernexec->a_text, 573 VM_PROT_READ, PTE_CACHE); 574 logical += pmap_map_chunk(l1pagetable, 575 KERNEL_TEXT_BASE + logical, 576 physical_start + logical, kernexec->a_data, 577 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 logical += pmap_map_chunk(l1pagetable, 579 KERNEL_TEXT_BASE + logical, 580 physical_start + logical, kernexec->a_bss, 581 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 logical += pmap_map_chunk(l1pagetable, 583 KERNEL_TEXT_BASE + logical, 584 physical_start + logical, kernexec->a_syms + sizeof(int) 585 + *(u_int *)((int)&end + kernexec->a_syms + sizeof(int)), 586 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 587 } 588 589 /* 590 * PATCH PATCH ... 591 * 592 * Fixup the first word of the kernel to be the instruction 593 * add pc, pc, #0x41000000 594 * 595 * This traps the case where the CPU core resets due to bus contention 596 * on a prototype CATS system and will reboot into the firmware. 597 */ 598 *((u_int *)KERNEL_TEXT_BASE) = 0xe28ff441; 599 600 #ifdef VERBOSE_INIT_ARM 601 printf("Constructing L2 page tables\n"); 602 #endif 603 604 /* Map the boot arguments page */ 605 pmap_map_entry(l1pagetable, ebsabootinfo.bt_vargp, 606 ebsabootinfo.bt_pargp, VM_PROT_READ, PTE_CACHE); 607 608 /* Map the stack pages */ 609 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 610 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 611 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 612 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 613 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 614 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 615 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 616 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 617 618 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 619 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 620 621 /* Map the page table that maps the kernel pages */ 622 pmap_map_entry(l1pagetable, kernel_ptpt.pv_va, kernel_ptpt.pv_pa, 623 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 624 625 /* 626 * Map entries in the page table used to map PTE's 627 * Basically every kernel page table gets mapped here 628 */ 629 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 630 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 631 pmap_map_entry(l1pagetable, 632 PTE_BASE + ((KERNEL_BASE + 633 (loop * 0x00400000)) >> (PGSHIFT-2)), 634 kernel_pt_table[KERNEL_PT_KERNEL + loop].pv_pa, 635 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 636 637 pmap_map_entry(l1pagetable, 638 PTE_BASE + (PTE_BASE >> (PGSHIFT-2)), 639 kernel_ptpt.pv_pa, 640 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 641 pmap_map_entry(l1pagetable, 642 PTE_BASE + (0x00000000 >> (PGSHIFT-2)), 643 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 644 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 645 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 646 pmap_map_entry(l1pagetable, 647 PTE_BASE + ((KERNEL_VM_BASE + 648 (loop * 0x00400000)) >> (PGSHIFT-2)), 649 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 650 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 651 652 /* Map the vector page. */ 653 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 654 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 655 656 /* Map the core memory needed before autoconfig */ 657 loop = 0; 658 while (l1_sec_table[loop].size) { 659 vm_size_t sz; 660 661 #ifdef VERBOSE_INIT_ARM 662 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 663 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 664 l1_sec_table[loop].va); 665 #endif 666 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE) 667 pmap_map_section(l1pagetable, 668 l1_sec_table[loop].va + sz, 669 l1_sec_table[loop].pa + sz, 670 l1_sec_table[loop].prot, 671 l1_sec_table[loop].cache); 672 ++loop; 673 } 674 675 /* 676 * Now we have the real page tables in place so we can switch to them. 677 * Once this is done we will be running with the REAL kernel page tables. 678 */ 679 680 /* Switch tables */ 681 #ifdef VERBOSE_INIT_ARM 682 printf("switching to new L1 page table\n"); 683 #endif 684 685 setttb(kernel_l1pt.pv_pa); 686 687 /* 688 * Ok the DC21285 CSR registers have just moved. 689 * Detach the diagnostic serial port and reattach at the new address. 690 */ 691 /* fcomcndetach();*/ 692 693 /* 694 * XXX this should only be done in main() but it useful to 695 * have output earlier ... 696 */ 697 consinit(); 698 699 #ifdef VERBOSE_INIT_ARM 700 printf("bootstrap done.\n"); 701 #endif 702 703 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 704 705 /* 706 * Pages were allocated during the secondary bootstrap for the 707 * stacks for different CPU modes. 708 * We must now set the r13 registers in the different CPU modes to 709 * point to these stacks. 710 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 711 * of the stack memory. 712 */ 713 printf("init subsystems: stacks "); 714 715 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 716 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 717 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 718 719 /* 720 * Well we should set a data abort handler. 721 * Once things get going this will change as we will need a proper handler. 722 * Until then we will use a handler that just panics but tells us 723 * why. 724 * Initialisation of the vectors will just panic on a data abort. 725 * This just fills in a slighly better one. 726 */ 727 printf("vectors "); 728 data_abort_handler_address = (u_int)data_abort_handler; 729 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 730 undefined_handler_address = (u_int)undefinedinstruction_bounce; 731 732 /* At last ! 733 * We now have the kernel in physical memory from the bottom upwards. 734 * Kernel page tables are physically above this. 735 * The kernel is mapped to KERNEL_TEXT_BASE 736 * The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff 737 * The page tables are mapped to 0xefc00000 738 */ 739 740 /* Initialise the undefined instruction handlers */ 741 printf("undefined "); 742 undefined_init(); 743 744 /* Load memory into UVM. */ 745 printf("page "); 746 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 747 748 /* XXX Always one RAM block -- nuke the loop. */ 749 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 750 paddr_t start = (paddr_t)bootconfig.dram[loop].address; 751 paddr_t end = start + (bootconfig.dram[loop].pages * NBPG); 752 #if NISADMA > 0 753 paddr_t istart, isize; 754 extern struct arm32_dma_range *footbridge_isa_dma_ranges; 755 extern int footbridge_isa_dma_nranges; 756 #endif 757 758 if (start < physical_freestart) 759 start = physical_freestart; 760 if (end > physical_freeend) 761 end = physical_freeend; 762 763 #if 0 764 printf("%d: %lx -> %lx\n", loop, start, end - 1); 765 #endif 766 767 #if NISADMA > 0 768 if (arm32_dma_range_intersect(footbridge_isa_dma_ranges, 769 footbridge_isa_dma_nranges, 770 start, end - start, 771 &istart, &isize)) { 772 /* 773 * Place the pages that intersect with the 774 * ISA DMA range onto the ISA DMA free list. 775 */ 776 #if 0 777 printf(" ISADMA 0x%lx -> 0x%lx\n", istart, 778 istart + isize - 1); 779 #endif 780 uvm_page_physload(atop(istart), 781 atop(istart + isize), atop(istart), 782 atop(istart + isize), VM_FREELIST_ISADMA); 783 784 /* 785 * Load the pieces that come before the 786 * intersection onto the default free list. 787 */ 788 if (start < istart) { 789 #if 0 790 printf(" BEFORE 0x%lx -> 0x%lx\n", 791 start, istart - 1); 792 #endif 793 uvm_page_physload(atop(start), 794 atop(istart), atop(start), 795 atop(istart), VM_FREELIST_DEFAULT); 796 } 797 798 /* 799 * Load the pieces that come after the 800 * intersection onto the default free list. 801 */ 802 if ((istart + isize) < end) { 803 #if 0 804 printf(" AFTER 0x%lx -> 0x%lx\n", 805 (istart + isize), end - 1); 806 #endif 807 uvm_page_physload(atop(istart + isize), 808 atop(end), atop(istart + isize), 809 atop(end), VM_FREELIST_DEFAULT); 810 } 811 } else { 812 uvm_page_physload(atop(start), atop(end), 813 atop(start), atop(end), VM_FREELIST_DEFAULT); 814 } 815 #else /* NISADMA > 0 */ 816 uvm_page_physload(atop(start), atop(end), 817 atop(start), atop(end), VM_FREELIST_DEFAULT); 818 #endif /* NISADMA > 0 */ 819 } 820 821 /* Boot strap pmap telling it where the kernel page table is */ 822 printf("pmap "); 823 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 824 825 /* Setup the IRQ system */ 826 printf("irq "); 827 footbridge_intr_init(); 828 printf("done.\n"); 829 830 #ifdef IPKDB 831 /* Initialise ipkdb */ 832 ipkdb_init(); 833 if (boothowto & RB_KDB) 834 ipkdb_connect(0); 835 #endif 836 837 #ifdef DDB 838 db_machine_init(); 839 #ifdef __ELF__ 840 /* ok this is really rather sick, in ELF what happens is that the 841 * ELF symbol table is added after the text section. 842 */ 843 ddb_init(0, NULL, NULL); /* XXX */ 844 #else 845 { 846 extern int end; 847 extern int *esym; 848 849 ddb_init(*(int *)&end, ((int *)&end) + 1, esym); 850 } 851 #endif /* __ELF__ */ 852 853 if (boothowto & RB_KDB) 854 Debugger(); 855 #endif 856 857 /* We return the new stack pointer address */ 858 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 859 } 860 861 static void 862 process_kernel_args(args) 863 char *args; 864 { 865 866 boothowto = 0; 867 868 /* Make a local copy of the bootargs */ 869 strncpy(bootargs, args, MAX_BOOT_STRING); 870 871 args = bootargs; 872 boot_file = bootargs; 873 874 /* Skip the kernel image filename */ 875 while (*args != ' ' && *args != 0) 876 ++args; 877 878 if (*args != 0) 879 *args++ = 0; 880 881 while (*args == ' ') 882 ++args; 883 884 boot_args = args; 885 886 printf("bootfile: %s\n", boot_file); 887 printf("bootargs: %s\n", boot_args); 888 889 parse_mi_bootargs(boot_args); 890 } 891 892 extern struct bus_space footbridge_pci_io_bs_tag; 893 extern struct bus_space footbridge_pci_mem_bs_tag; 894 void footbridge_pci_bs_tag_init __P((void)); 895 896 void 897 consinit(void) 898 { 899 static int consinit_called = 0; 900 char *console = CONSDEVNAME; 901 902 if (consinit_called != 0) 903 return; 904 905 consinit_called = 1; 906 907 #if NISA > 0 908 /* Initialise the ISA subsystem early ... */ 909 isa_footbridge_init(DC21285_PCI_IO_VBASE, DC21285_PCI_ISA_MEM_VBASE); 910 #endif 911 912 footbridge_pci_bs_tag_init(); 913 914 get_bootconf_option(boot_args, "console", BOOTOPT_TYPE_STRING, 915 &console); 916 917 if (strncmp(console, "fcom", 4) == 0 918 || strncmp(console, "diag", 4) == 0) 919 fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode); 920 #if (NVGA > 0) 921 else if (strncmp(console, "vga", 3) == 0) { 922 vga_cnattach(&footbridge_pci_io_bs_tag, 923 &footbridge_pci_mem_bs_tag, - 1, 0); 924 #if (NPCKBC > 0) 925 pckbc_cnattach(&isa_io_bs_tag, IO_KBD, KBCMDP, PCKBC_KBD_SLOT); 926 #endif /* NPCKBC */ 927 } 928 #endif /* NVGA */ 929 #if (NCOM > 0) 930 else if (strncmp(console, "com", 3) == 0) { 931 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 932 COM_FREQ, comcnmode)) 933 panic("can't init serial console @%x", CONCOMADDR); 934 } 935 #endif 936 /* Don't know what console was requested so use the fall back. */ 937 else 938 fcomcnattach(DC21285_ARMCSR_VBASE, comcnspeed, comcnmode); 939 } 940 941 /* End of ebsa285_machdep.c */ 942