iq80310_machdep.c revision 1.1
1 /* $NetBSD: iq80310_machdep.c,v 1.1 2001/09/05 04:53:41 matt 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 Netwinder firmware 38 * 39 * Created : 24/11/97 40 */ 41 42 #include "opt_ddb.h" 43 #include "opt_pmap_debug.h" 44 45 #include <sys/param.h> 46 #include <sys/device.h> 47 #include <sys/systm.h> 48 #include <sys/kernel.h> 49 #include <sys/exec.h> 50 #include <sys/proc.h> 51 #include <sys/msgbuf.h> 52 #include <sys/reboot.h> 53 #include <sys/termios.h> 54 55 #include <dev/cons.h> 56 57 #include <machine/db_machdep.h> 58 #include <ddb/db_sym.h> 59 #include <ddb/db_extern.h> 60 61 #include <machine/bootconfig.h> 62 #include <machine/bus.h> 63 #include <machine/cpu.h> 64 #include <machine/frame.h> 65 #include <machine/irqhandler.h> 66 #include <machine/pte.h> 67 #include <machine/undefined.h> 68 69 #include <machine/iq80310_boot.h> 70 #include <arm/xscale/i80312reg.h> 71 #include <arm/xscale/i80312var.h> 72 73 #include "opt_ipkdb.h" 74 75 #include "isa.h" 76 #if NISA > 0 77 #include <dev/isa/isareg.h> 78 #include <dev/isa/isavar.h> 79 #endif 80 81 /* 82 * Address to call from cpu_reset() to reset the machine. 83 * This is machine architecture dependant as it varies depending 84 * on where the ROM appears when you turn the MMU off. 85 */ 86 87 u_int cpu_reset_address = I80312_ROM_BASE; 88 89 u_int dc21285_fclk = FCLK; 90 91 /* Define various stack sizes in pages */ 92 #define IRQ_STACK_SIZE 1 93 #define ABT_STACK_SIZE 1 94 #ifdef IPKDB 95 #define UND_STACK_SIZE 2 96 #else 97 #define UND_STACK_SIZE 1 98 #endif 99 100 struct nwbootinfo nwbootinfo; 101 BootConfig bootconfig; /* Boot config storage */ 102 static char bootargs[MAX_BOOT_STRING + 1]; 103 char *boot_args = NULL; 104 char *boot_file = NULL; 105 106 vm_offset_t physical_start; 107 vm_offset_t physical_freestart; 108 vm_offset_t physical_freeend; 109 vm_offset_t physical_end; 110 u_int free_pages; 111 vm_offset_t pagetables_start; 112 int physmem = 0; 113 114 /*int debug_flags;*/ 115 #ifndef PMAP_STATIC_L1S 116 int max_processes = 64; /* Default number */ 117 #endif /* !PMAP_STATIC_L1S */ 118 119 /* Physical and virtual addresses for some global pages */ 120 pv_addr_t systempage; 121 pv_addr_t irqstack; 122 pv_addr_t undstack; 123 pv_addr_t abtstack; 124 pv_addr_t kernelstack; 125 126 vm_offset_t msgbufphys; 127 128 extern u_int data_abort_handler_address; 129 extern u_int prefetch_abort_handler_address; 130 extern u_int undefined_handler_address; 131 132 #ifdef PMAP_DEBUG 133 extern int pmap_debug_level; 134 #endif 135 136 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 137 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 138 #define KERNEL_PT_VMDATA 2 /* Page tables for mapping kernel VM */ 139 #define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2)) 140 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 141 142 pt_entry_t kernel_pt_table[NUM_KERNEL_PTS]; 143 144 struct user *proc0paddr; 145 146 /* Prototypes */ 147 148 void consinit __P((void)); 149 150 void map_section __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa, 151 int cacheable)); 152 void map_pagetable __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 153 void map_entry __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 154 void map_entry_nc __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 155 void map_entry_ro __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 156 vm_size_t map_chunk __P((vm_offset_t pd, vm_offset_t pt, vm_offset_t va, 157 vm_offset_t pa, vm_size_t size, u_int acc, 158 u_int flg)); 159 160 void process_kernel_args __P((char *)); 161 void data_abort_handler __P((trapframe_t *frame)); 162 void prefetch_abort_handler __P((trapframe_t *frame)); 163 void undefinedinstruction_bounce __P((trapframe_t *frame)); 164 void zero_page_readonly __P((void)); 165 void zero_page_readwrite __P((void)); 166 extern void configure __P((void)); 167 extern void db_machine_init __P((void)); 168 extern void parse_mi_bootargs __P((char *args)); 169 extern void dumpsys __P((void)); 170 171 /* A load of console goo. */ 172 #include "vga.h" 173 #if (NVGA > 0) 174 #include <dev/ic/mc6845reg.h> 175 #include <dev/ic/pcdisplayvar.h> 176 #include <dev/ic/vgareg.h> 177 #include <dev/ic/vgavar.h> 178 #endif 179 180 #include "pckbc.h" 181 #if (NPCKBC > 0) 182 #include <dev/ic/i8042reg.h> 183 #include <dev/ic/pckbcvar.h> 184 #endif 185 186 #include "com.h" 187 #if (NCOM > 0) 188 #include <dev/ic/comreg.h> 189 #include <dev/ic/comvar.h> 190 #ifndef CONCOMADDR 191 #define CONCOMADDR 0 192 #endif 193 #endif 194 195 #ifndef CONSDEVNAME 196 #define CONSDEVNAME "com" 197 #endif 198 199 #define CONSPEED B115200 200 #ifndef CONSPEED 201 #define CONSPEED B9600 /* TTYDEF_SPEED */ 202 #endif 203 #ifndef CONMODE 204 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 205 #endif 206 207 int comcnspeed = CONSPEED; 208 int comcnmode = CONMODE; 209 210 extern struct consdev kcomcons; 211 static void kcomcnputc(dev_t, int); 212 213 /* 214 * void cpu_reboot(int howto, char *bootstr) 215 * 216 * Reboots the system 217 * 218 * Deal with any syncing, unmounting, dumping and shutdown hooks, 219 * then reset the CPU. 220 */ 221 222 void 223 cpu_reboot(int howto, char *bootstr) 224 { 225 #ifdef DIAGNOSTIC 226 /* info */ 227 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 228 #endif 229 230 /* 231 * If we are still cold then hit the air brakes 232 * and crash to earth fast 233 */ 234 if (cold) { 235 doshutdownhooks(); 236 printf("The operating system has halted.\n"); 237 printf("Please press any key to reboot.\n\n"); 238 cngetc(); 239 printf("rebooting...\n"); 240 cpu_reset(); 241 /*NOTREACHED*/ 242 } 243 244 /* Disable console buffering */ 245 /* cnpollc(1);*/ 246 247 /* 248 * If RB_NOSYNC was not specified sync the discs. 249 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 250 * It looks like syslogd is getting woken up only to find that it cannot 251 * page part of the binary in as the filesystem has been unmounted. 252 */ 253 if (!(howto & RB_NOSYNC)) 254 bootsync(); 255 256 /* Say NO to interrupts */ 257 splhigh(); 258 259 /* Do a dump if requested. */ 260 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 261 dumpsys(); 262 263 /* Run any shutdown hooks */ 264 doshutdownhooks(); 265 266 /* Make sure IRQ's are disabled */ 267 IRQdisable; 268 269 if (howto & RB_HALT) { 270 printf("The operating system has halted.\n"); 271 printf("Please press any key to reboot.\n\n"); 272 cngetc(); 273 } 274 275 printf("rebooting...\n"); 276 cpu_reset(); 277 /*NOTREACHED*/ 278 } 279 280 /* 281 * Mapping table for core kernel memory. This memory is mapped at init 282 * time with section mappings. 283 */ 284 struct l1_sec_map { 285 vaddr_t va; 286 vaddr_t pa; 287 vsize_t size; 288 int flags; 289 } l1_sec_table[] = { 290 { 291 /* Map 1MB for CSR space */ 292 I80312_ARMCSR_VBASE, 293 I80312_ARMCSR_BASE, 294 I80312_ARMCSR_VSIZE, 295 0 296 }, { 297 /* Map 1MB for fast cache cleaning space */ 298 I80312_CACHE_FLUSH_VBASE, 299 I80312_SA_CACHE_FLUSH_BASE, 300 I80312_CACHE_FLUSH_VSIZE, 301 1 302 }, { 303 /* Map 1MB for PCI IO space */ 304 I80312_PCI_IO_VBASE, 305 I80312_PCI_IO_BASE, 306 I80312_PCI_IO_VSIZE, 307 0 308 }, { 309 /* Map 1MB for PCI IACK space */ 310 I80312_PCI_IACK_VBASE, 311 I80312_PCI_IACK_SPECIAL, 312 I80312_PCI_IACK_VSIZE, 313 0 314 }, { 315 /* Map 16MB of type 1 PCI config access */ 316 I80312_PCI_TYPE_1_CONFIG_VBASE, 317 I80312_PCI_TYPE_1_CONFIG, 318 I80312_PCI_TYPE_1_CONFIG_VSIZE, 319 0 320 }, { 321 /* Map 16MB of type 0 PCI config access */ 322 I80312_PCI_TYPE_0_CONFIG_VBASE, 323 I80312_PCI_TYPE_0_CONFIG, 324 I80312_PCI_TYPE_0_CONFIG_VSIZE, 325 0 326 }, { 327 #if NISA > 0 328 /* Map 1MB of 32 bit PCI address space for ISA MEM accesses via PCI */ 329 I80312_PCI_ISA_MEM_VBASE, 330 I80312_PCI_MEM_BASE, 331 I80312_PCI_ISA_MEM_VSIZE, 332 0 333 #endif 334 }, { 335 0, 336 0, 337 0, 338 0, 339 } 340 }; 341 342 /* 343 * u_int initarm(struct ebsaboot *bootinfo) 344 * 345 * Initial entry point on startup. This gets called before main() is 346 * entered. 347 * It should be responsible for setting up everything that must be 348 * in place when main is called. 349 * This includes 350 * Taking a copy of the boot configuration structure. 351 * Initialising the physical console so characters can be printed. 352 * Setting up page tables for the kernel 353 * Relocating the kernel to the bottom of physical memory 354 */ 355 356 u_int 357 initarm(bootinfo) 358 struct nwbootinfo *bootinfo; 359 { 360 int loop; 361 int loop1; 362 u_int l1pagetable; 363 u_int l2pagetable; 364 extern char page0[], page0_end[]; 365 #if 0 366 extern int end[]; 367 extern int *esym; 368 #endif 369 pv_addr_t kernel_l1pt; 370 pv_addr_t kernel_ptpt; 371 372 cn_tab = &kcomcons; 373 /* 374 * Heads up ... Setup the CPU / MMU / TLB functions 375 */ 376 if (set_cpufuncs()) 377 panic("cpu not recognized!"); 378 379 /* Fake bootconfig structure for the benefit of pmap.c */ 380 /* XXX must make the memory description h/w independant */ 381 bootconfig.dramblocks = 1; 382 bootconfig.dram[0].address = 0xa0000000; 383 bootconfig.dram[0].pages = 0x02000000 / NBPG; /* nwbootinfo.bi_nrpages */ 384 /* - nwbootinfo.bt_memstart) / NBPG */; 385 386 /* 387 * Initialise the diagnostic serial console 388 * This allows a means of generating output during initarm(). 389 * Once all the memory map changes are complete we can call consinit() 390 * and not have to worry about things moving. 391 */ 392 393 /* Talk to the user */ 394 printf("\nNetBSD/netwinder booting ...\n"); 395 396 /* 397 * Ok we have the following memory map 398 * 399 * virtual address == physical address apart from the areas: 400 * 0x00000000 -> 0x000fffff which is mapped to 401 * top 1MB of physical memory 402 * 0x00100000 -> 0x0fffffff which is mapped to 403 * physical addresses 0x00100000 -> 0x0fffffff 404 * 0x10000000 -> 0x1fffffff which is mapped to 405 * physical addresses 0x00000000 -> 0x0fffffff 406 * 0x20000000 -> 0xefffffff which is mapped to 407 * physical addresses 0x20000000 -> 0xefffffff 408 * 0xf0000000 -> 0xf03fffff which is mapped to 409 * physical addresses 0xa0000000 -> 0xa03fffff 410 * 411 * This means that the kernel is mapped suitably for continuing 412 * execution, all I/O is mapped 1:1 virtual to physical and 413 * physical memory is accessible. 414 * 415 * The initarm() has the responsibility for creating the kernel 416 * page tables. 417 * It must also set up various memory pointers that are used 418 * by pmap etc. 419 */ 420 421 /* 422 * Examine the boot args string for options we need to know about 423 * now. 424 */ 425 #if 0 426 process_kernel_args((char *)nwbootinfo.bt_args); 427 #endif 428 429 printf("initarm: Configuring system ...\n"); 430 431 /* 432 * Set up the variables that define the availablilty of 433 * physical memory 434 */ 435 physical_start = 0 /*nwbootinfo.bt_memstart*/; 436 physical_freestart = physical_start; 437 physical_end = /*nwbootinfo.bt_memend*/ /*nwbootinfo.bi_nrpages * NBPG */ 64*1024*1024; 438 physical_freeend = physical_end; 439 free_pages = (physical_end - physical_start) / NBPG; 440 441 physmem = (physical_end - physical_start) / NBPG; 442 443 /* Tell the user about the memory */ 444 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 445 physical_start, physical_end - 1); 446 447 /* 448 * Ok the kernel occupies the bottom of physical memory. 449 * The first free page after the kernel can be found in 450 * nwbootinfo->bt_memavail 451 * We now need to allocate some fixed page tables to get the kernel 452 * going. 453 * We allocate one page directory and a number page tables and store 454 * the physical addresses in the kernel_pt_table array. 455 * 456 * Ok the next bit of physical allocation may look complex but it is 457 * simple really. I have done it like this so that no memory gets 458 * wasted during the allocation of various pages and tables that are 459 * all different sizes. 460 * The start addresses will be page aligned. 461 * We allocate the kernel page directory on the first free 16KB boundry 462 * we find. 463 * We allocate the kernel page tables on the first 4KB boundry we find. 464 * Since we allocate at least 3 L2 pagetables we know that we must 465 * encounter at least one 16KB aligned address. 466 */ 467 468 #ifdef VERBOSE_INIT_ARM 469 printf("Allocating page tables\n"); 470 #endif 471 472 #if 0 473 /* Update the address of the first free 16KB chunk of physical memory */ 474 physical_freestart = ((uintptr_t) &end + PGOFSET) & ~PGOFSET; 475 #if 0 476 physical_freestart += (kernexec->a_syms + sizeof(int) 477 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)) 478 + (NBPG - 1)) & ~(NBPG - 1); 479 #endif 480 #else 481 physical_freestart = 0x00200000; /* start at 2MB */ 482 #endif 483 484 free_pages -= (physical_freestart - physical_start) / NBPG; 485 #ifdef VERBOSE_INIT_ARM 486 printf("freestart = %#lx, free_pages = %d (%#x)\n", 487 physical_freestart, free_pages, free_pages); 488 #endif 489 490 /* Define a macro to simplify memory allocation */ 491 #define valloc_pages(var, np) \ 492 alloc_pages((var).pv_pa, (np)); \ 493 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 494 495 #define alloc_pages(var, np) \ 496 (var) = physical_freestart; \ 497 physical_freestart += ((np) * NBPG); \ 498 free_pages -= (np); \ 499 memset((char *)(var), 0, ((np) * NBPG)); 500 501 loop1 = 0; 502 kernel_l1pt.pv_pa = 0; 503 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 504 /* Are we 16KB aligned for an L1 ? */ 505 if ((physical_freestart & (PD_SIZE - 1)) == 0 506 && kernel_l1pt.pv_pa == 0) { 507 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 508 } else { 509 alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG); 510 ++loop1; 511 } 512 } 513 514 /* This should never be able to happen but better confirm that. */ 515 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0) 516 panic("initarm: Failed to align the kernel page directory\n"); 517 518 /* 519 * Allocate a page for the system page mapped to V0x00000000 520 * This page will just contain the system vectors and can be 521 * shared by all processes. 522 */ 523 alloc_pages(systempage.pv_pa, 1); 524 525 /* Allocate a page for the page table to map kernel page tables*/ 526 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 527 528 /* Allocate stacks for all modes */ 529 valloc_pages(irqstack, IRQ_STACK_SIZE); 530 valloc_pages(abtstack, ABT_STACK_SIZE); 531 valloc_pages(undstack, UND_STACK_SIZE); 532 valloc_pages(kernelstack, UPAGES); 533 534 #ifdef VERBOSE_INIT_ARM 535 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 536 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 537 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 538 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 539 #endif 540 541 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 542 543 /* 544 * Ok we have allocated physical pages for the primary kernel 545 * page tables 546 */ 547 548 #ifdef VERBOSE_INIT_ARM 549 printf("Creating L1 page table at %#lx\n", kernel_l1pt.pv_pa); 550 #endif 551 552 /* 553 * Now we start consturction of the L1 page table 554 * We start by mapping the L2 page tables into the L1. 555 * This means that we can replace L1 mappings later on if necessary 556 */ 557 l1pagetable = kernel_l1pt.pv_pa; 558 559 /* Map the L2 pages tables in the L1 page table */ 560 map_pagetable(l1pagetable, 0x00000000, 561 kernel_pt_table[KERNEL_PT_SYS]); 562 map_pagetable(l1pagetable, KERNEL_BASE, 563 kernel_pt_table[KERNEL_PT_KERNEL]); 564 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 565 map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 566 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 567 map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE, 568 kernel_ptpt.pv_pa); 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Mapping kernel\n"); 572 #endif 573 574 /* Now we fill in the L2 pagetable for the kernel static code/data */ 575 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 576 577 #if 0 578 { 579 u_int logical; 580 extern int etext, end; 581 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 582 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 583 584 /* Round down text size and round up total size 585 */ 586 textsize = textsize & ~PGOFSET; 587 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 588 logical = map_chunk(0, l2pagetable, KERNEL_BASE, 589 physical_start, KERNEL_TEXT_BASE - KERNEL_BASE, 590 AP_KRW, PT_CACHEABLE); 591 logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical, 592 physical_start + logical, textsize, 593 AP_KRW, PT_CACHEABLE); 594 logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical, 595 physical_start + logical, totalsize - textsize, 596 AP_KRW, PT_CACHEABLE); 597 #if 0 598 logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical, 599 physical_start + logical, kernexec->a_syms + sizeof(int) 600 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)), 601 AP_KRW, PT_CACHEABLE); 602 #endif 603 } 604 #else 605 map_section(l1pagetable, 0xf0000000, 0x00000000, 1); 606 map_section(l1pagetable, 0xf0100000, 0x00100000, 1); 607 #endif 608 #if 0 609 /* 610 * PATCH PATCH ... 611 * 612 * Fixup the first word of the kernel to be the instruction 613 * add pc, pc, #0x41000000 614 * 615 * This traps the case where the CPU core resets due to bus contention 616 * on a prototype CATS system and will reboot into the firmware. 617 */ 618 *((u_int *)KERNEL_TEXT_BASE) = 0xe28ff441; 619 #endif 620 621 #ifdef VERBOSE_INIT_ARM 622 printf("Constructing L2 page tables\n"); 623 #endif 624 625 /* Map the boot arguments page */ 626 #if 0 627 map_entry_ro(l2pagetable, nwbootinfo.bt_vargp, nwbootinfo.bt_pargp); 628 #endif 629 630 /* Map the stack pages */ 631 map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa, 632 IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 633 map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa, 634 ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 635 map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa, 636 UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 637 map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa, 638 UPAGES * NBPG, AP_KRW, PT_CACHEABLE); 639 map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 640 PD_SIZE, AP_KRW, 0); 641 642 /* Map the page table that maps the kernel pages */ 643 map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa); 644 645 /* 646 * Map entries in the page table used to map PTE's 647 * Basically every kernel page table gets mapped here 648 */ 649 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 650 l2pagetable = kernel_ptpt.pv_pa; 651 map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 652 kernel_pt_table[KERNEL_PT_KERNEL]); 653 map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 654 kernel_ptpt.pv_pa); 655 map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 656 kernel_pt_table[KERNEL_PT_SYS]); 657 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 658 map_entry_nc(l2pagetable, ((KERNEL_VM_BASE + 659 (loop * 0x00400000)) >> (PGSHIFT-2)), 660 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 661 662 /* 663 * Map the system page in the kernel page table for the bottom 1Meg 664 * of the virtual memory map. 665 */ 666 l2pagetable = kernel_pt_table[KERNEL_PT_SYS]; 667 map_entry(l2pagetable, 0x00000000, systempage.pv_pa); 668 669 /* Map the core memory needed before autoconfig */ 670 loop = 0; 671 while (l1_sec_table[loop].size) { 672 vm_size_t sz; 673 674 #ifdef VERBOSE_INIT_ARM 675 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 676 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 677 l1_sec_table[loop].va); 678 #endif 679 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE) 680 map_section(l1pagetable, l1_sec_table[loop].va + sz, 681 l1_sec_table[loop].pa + sz, 682 l1_sec_table[loop].flags); 683 ++loop; 684 } 685 686 /* 687 * Now we have the real page tables in place so we can switch to them. 688 * Once this is done we will be running with the REAL kernel page tables. 689 */ 690 691 /* Switch tables */ 692 #ifdef VERBOSE_INIT_ARM 693 printf("freestart = %#lx, free_pages = %d (%#x)\n", 694 physical_freestart, free_pages, free_pages); 695 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 696 #endif 697 698 setttb(kernel_l1pt.pv_pa); 699 700 #ifdef VERBOSE_INIT_ARM 701 printf("done!\n"); 702 #endif 703 /* 704 * Ok the I80312 CSR registers have just moved. 705 * Detach the diagnostic serial port and reattach at the new address. 706 */ 707 708 /* 709 * XXX this should only be done in main() but it useful to 710 * have output earlier ... 711 */ 712 consinit(); 713 714 #ifdef VERBOSE_INIT_ARM 715 printf("bootstrap done.\n"); 716 #endif 717 718 /* Right set up the vectors at the bottom of page 0 */ 719 memcpy((char *)0x00000000, page0, page0_end - page0); 720 721 /* We have modified a text page so sync the icache */ 722 cpu_cache_syncI(); 723 724 /* 725 * Pages were allocated during the secondary bootstrap for the 726 * stacks for different CPU modes. 727 * We must now set the r13 registers in the different CPU modes to 728 * point to these stacks. 729 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 730 * of the stack memory. 731 */ 732 printf("init subsystems: stacks "); 733 734 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 735 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 736 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 737 738 /* 739 * Well we should set a data abort handler. 740 * Once things get going this will change as we will need a proper handler. 741 * Until then we will use a handler that just panics but tells us 742 * why. 743 * Initialisation of the vectors will just panic on a data abort. 744 * This just fills in a slighly better one. 745 */ 746 printf("vectors "); 747 data_abort_handler_address = (u_int)data_abort_handler; 748 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 749 undefined_handler_address = (u_int)undefinedinstruction_bounce; 750 751 /* At last ! 752 * We now have the kernel in physical memory from the bottom upwards. 753 * Kernel page tables are physically above this. 754 * The kernel is mapped to KERNEL_TEXT_BASE 755 * The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff 756 * The page tables are mapped to 0xefc00000 757 */ 758 759 /* Initialise the undefined instruction handlers */ 760 printf("undefined "); 761 undefined_init(); 762 763 /* Boot strap pmap telling it where the kernel page table is */ 764 printf("pmap "); 765 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 766 767 /* Setup the IRQ system */ 768 printf("irq "); 769 irq_init(); 770 printf("done.\n"); 771 772 #ifdef IPKDB 773 /* Initialise ipkdb */ 774 ipkdb_init(); 775 if (boothowto & RB_KDB) 776 ipkdb_connect(0); 777 #endif 778 779 #ifdef DDB 780 printf("ddb: "); 781 db_machine_init(); 782 #if 0 783 ddb_init(end[0], end + 1, esym); 784 #endif 785 786 if (boothowto & RB_KDB) 787 Debugger(); 788 #endif 789 790 /* We return the new stack pointer address */ 791 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 792 } 793 794 void 795 process_kernel_args(args) 796 char *args; 797 { 798 799 boothowto = 0; 800 801 /* Make a local copy of the bootargs */ 802 strncpy(bootargs, args, MAX_BOOT_STRING); 803 804 args = bootargs; 805 boot_file = bootargs; 806 807 /* Skip the kernel image filename */ 808 while (*args != ' ' && *args != 0) 809 ++args; 810 811 if (*args != 0) 812 *args++ = 0; 813 814 while (*args == ' ') 815 ++args; 816 817 boot_args = args; 818 819 printf("bootfile: %s\n", boot_file); 820 printf("bootargs: %s\n", boot_args); 821 822 parse_mi_bootargs(boot_args); 823 } 824 825 #if 0 826 void 827 arm32_cachectl(va, len, flags) 828 vm_offset_t va; 829 int len; 830 int flags; 831 { 832 pt_entry_t *ptep, pte; 833 int loop; 834 vm_offset_t addr; 835 836 /* printf("arm32_cachectl(%x,%x,%x)\n", va, len, flags);*/ 837 838 if (flags & 1) { 839 addr = va; 840 loop = len; 841 while (loop > 0) { 842 ptep = vtopte(addr & (~PGOFSET)); 843 pte = *ptep; 844 845 *ptep = (pte & ~(PT_C | PT_B)) | (flags & (PT_C | PT_B)); 846 847 loop -= NBPG; 848 addr += NBPG; 849 } 850 tlb_flush(); 851 } 852 853 cpu_cache_purgeD_rng(va, len); 854 } 855 #endif 856 857 extern struct bus_space footbridge_pci_io_bs_tag; 858 extern struct bus_space footbridge_pci_mem_bs_tag; 859 void footbridge_pci_bs_tag_init __P((void)); 860 861 void 862 consinit(void) 863 { 864 static int consinit_called = 0; 865 866 if (consinit_called != 0) 867 return; 868 869 consinit_called = 1; 870 871 bust = iq80310_bs_init(); 872 #if (NCOM > 0) 873 if (comcnattach(&bust, CONCOMADDR, comcnspeed, 874 COM_FREQ, comcnmode)) 875 panic("can't init serial console @%x", CONCOMADDR); 876 #else 877 panic("serial console @%x not configured", CONCOMADDR); 878 #endif 879 } 880 } 881 882 static bus_space_handle_t kcom_base = (bus_space_handle_t) I80312_COM0_VBASE; 883 884 u_int8_t i80312_bs_r_1(void *, bus_space_handle_t, bus_size_t); 885 void i80312_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t); 886 887 #define KCOM_GETBYTE(r) i80312_bs_r_1(0, kcom_base, (r)) 888 #define KCOM_PUTBYTE(r,v) i80312_bs_w_1(0, kcom_base, (r), (v)) 889 890 static int 891 kcomcngetc(dev_t dev) 892 { 893 int stat, c; 894 895 /* block until a character becomes available */ 896 while (!ISSET(stat = KCOM_GETBYTE(com_lsr), LSR_RXRDY)) 897 ; 898 899 c = KCOM_GETBYTE(com_data); 900 stat = KCOM_GETBYTE(com_iir); 901 return c; 902 } 903 904 /* 905 * Console kernel output character routine. 906 */ 907 static void 908 kcomcnputc(dev_t dev, int c) 909 { 910 int timo; 911 912 /* wait for any pending transmission to finish */ 913 timo = 150000; 914 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 915 continue; 916 917 KCOM_PUTBYTE(com_data, c); 918 919 /* wait for this transmission to complete */ 920 timo = 1500000; 921 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 922 continue; 923 } 924 925 static void 926 kcomcnpollc(dev_t dev, int on) 927 { 928 } 929 930 struct consdev kcomcons = { 931 NULL, NULL, kcomcngetc, kcomcnputc, kcomcnpollc, NULL, 932 NODEV, CN_NORMAL 933 }; 934
Indexes created Tue Oct 21 19:09:51 GMT 2025