integrator_machdep.c revision 1.14
1 /* $NetBSD: integrator_machdep.c,v 1.14 2002/02/21 21:58:02 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2001 ARM Ltd 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of the company may not be used to endorse or promote 16 * products derived from this software without specific prior written 17 * permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * Copyright (c) 1997,1998 Mark Brinicombe. 32 * Copyright (c) 1997,1998 Causality Limited. 33 * All rights reserved. 34 * 35 * Redistribution and use in source and binary forms, with or without 36 * modification, are permitted provided that the following conditions 37 * are met: 38 * 1. Redistributions of source code must retain the above copyright 39 * notice, this list of conditions and the following disclaimer. 40 * 2. Redistributions in binary form must reproduce the above copyright 41 * notice, this list of conditions and the following disclaimer in the 42 * documentation and/or other materials provided with the distribution. 43 * 3. All advertising materials mentioning features or use of this software 44 * must display the following acknowledgement: 45 * This product includes software developed by Mark Brinicombe 46 * for the NetBSD Project. 47 * 4. The name of the company nor the name of the author may be used to 48 * endorse or promote products derived from this software without specific 49 * prior written permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 52 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 53 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 54 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 55 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 56 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 59 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 60 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 61 * SUCH DAMAGE. 62 * 63 * Machine dependant functions for kernel setup for integrator board 64 * 65 * Created : 24/11/97 66 */ 67 68 #include "opt_ddb.h" 69 #include "opt_pmap_debug.h" 70 71 #include <sys/param.h> 72 #include <sys/device.h> 73 #include <sys/systm.h> 74 #include <sys/kernel.h> 75 #include <sys/exec.h> 76 #include <sys/proc.h> 77 #include <sys/msgbuf.h> 78 #include <sys/reboot.h> 79 #include <sys/termios.h> 80 81 #include <dev/cons.h> 82 83 #include <machine/db_machdep.h> 84 #include <ddb/db_sym.h> 85 #include <ddb/db_extern.h> 86 87 #include <machine/bootconfig.h> 88 #include <machine/bus.h> 89 #include <machine/cpu.h> 90 #include <machine/frame.h> 91 #include <machine/intr.h> 92 #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */ 93 #include <arm/undefined.h> 94 95 #include <evbarm/integrator/integrator_boot.h> 96 97 #include "opt_ipkdb.h" 98 #include "pci.h" 99 100 void ifpga_reset(void) __attribute__((noreturn)); 101 /* 102 * Address to call from cpu_reset() to reset the machine. 103 * This is machine architecture dependant as it varies depending 104 * on where the ROM appears when you turn the MMU off. 105 */ 106 107 u_int cpu_reset_address = (u_int) ifpga_reset; 108 109 /* Define various stack sizes in pages */ 110 #define IRQ_STACK_SIZE 1 111 #define ABT_STACK_SIZE 1 112 #ifdef IPKDB 113 #define UND_STACK_SIZE 2 114 #else 115 #define UND_STACK_SIZE 1 116 #endif 117 118 struct intbootinfo intbootinfo; 119 BootConfig bootconfig; /* Boot config storage */ 120 static char bootargs[MAX_BOOT_STRING + 1]; 121 char *boot_args = NULL; 122 char *boot_file = NULL; 123 124 vm_offset_t physical_start; 125 vm_offset_t physical_freestart; 126 vm_offset_t physical_freeend; 127 vm_offset_t physical_end; 128 u_int free_pages; 129 vm_offset_t pagetables_start; 130 int physmem = 0; 131 132 /*int debug_flags;*/ 133 #ifndef PMAP_STATIC_L1S 134 int max_processes = 64; /* Default number */ 135 #endif /* !PMAP_STATIC_L1S */ 136 137 /* Physical and virtual addresses for some global pages */ 138 pv_addr_t systempage; 139 pv_addr_t irqstack; 140 pv_addr_t undstack; 141 pv_addr_t abtstack; 142 pv_addr_t kernelstack; 143 144 vm_offset_t msgbufphys; 145 146 extern u_int data_abort_handler_address; 147 extern u_int prefetch_abort_handler_address; 148 extern u_int undefined_handler_address; 149 150 #ifdef PMAP_DEBUG 151 extern int pmap_debug_level; 152 #endif 153 154 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 155 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 156 #define KERNEL_PT_VMDATA 2 /* Page tables for mapping kernel VM */ 157 #define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2)) 158 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 159 160 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 161 162 struct user *proc0paddr; 163 164 /* Prototypes */ 165 166 void consinit __P((void)); 167 168 void process_kernel_args __P((char *)); 169 void data_abort_handler __P((trapframe_t *frame)); 170 void prefetch_abort_handler __P((trapframe_t *frame)); 171 void undefinedinstruction_bounce __P((trapframe_t *frame)); 172 extern void configure __P((void)); 173 extern void parse_mi_bootargs __P((char *args)); 174 extern void dumpsys __P((void)); 175 176 /* A load of console goo. */ 177 #include "vga.h" 178 #if (NVGA > 0) 179 #include <dev/ic/mc6845reg.h> 180 #include <dev/ic/pcdisplayvar.h> 181 #include <dev/ic/vgareg.h> 182 #include <dev/ic/vgavar.h> 183 #endif 184 185 #include "pckbc.h" 186 #if (NPCKBC > 0) 187 #include <dev/ic/i8042reg.h> 188 #include <dev/ic/pckbcvar.h> 189 #endif 190 191 #include "com.h" 192 #if (NCOM > 0) 193 #include <dev/ic/comreg.h> 194 #include <dev/ic/comvar.h> 195 #ifndef CONCOMADDR 196 #define CONCOMADDR 0x3f8 197 #endif 198 #endif 199 200 #define CONSPEED B115200 201 #ifndef CONSPEED 202 #define CONSPEED B9600 /* TTYDEF_SPEED */ 203 #endif 204 #ifndef CONMODE 205 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 206 #endif 207 208 int comcnspeed = CONSPEED; 209 int comcnmode = CONMODE; 210 211 #include "plcom.h" 212 #if (NPLCOM > 0) 213 #include <evbarm/dev/plcomreg.h> 214 #include <evbarm/dev/plcomvar.h> 215 216 #include <evbarm/ifpga/ifpgamem.h> 217 #include <evbarm/ifpga/ifpgareg.h> 218 #include <evbarm/ifpga/ifpgavar.h> 219 #endif 220 221 #ifndef CONSDEVNAME 222 #define CONSDEVNAME "plcom" 223 #endif 224 225 #ifndef PLCONSPEED 226 #define PLCONSPEED B38400 227 #endif 228 #ifndef PLCONMODE 229 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 230 #endif 231 #ifndef PLCOMCNUNIT 232 #define PLCOMCNUNIT -1 233 #endif 234 235 int plcomcnspeed = PLCONSPEED; 236 int plcomcnmode = PLCONMODE; 237 238 #if 0 239 extern struct consdev kcomcons; 240 static void kcomcnputc(dev_t, int); 241 #endif 242 243 /* 244 * void cpu_reboot(int howto, char *bootstr) 245 * 246 * Reboots the system 247 * 248 * Deal with any syncing, unmounting, dumping and shutdown hooks, 249 * then reset the CPU. 250 */ 251 252 void 253 cpu_reboot(howto, bootstr) 254 int howto; 255 char *bootstr; 256 { 257 #ifdef DIAGNOSTIC 258 /* info */ 259 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 260 #endif 261 262 /* 263 * If we are still cold then hit the air brakes 264 * and crash to earth fast 265 */ 266 if (cold) { 267 doshutdownhooks(); 268 printf("The operating system has halted.\n"); 269 printf("Please press any key to reboot.\n\n"); 270 cngetc(); 271 printf("rebooting...\n"); 272 ifpga_reset(); 273 /*NOTREACHED*/ 274 } 275 276 /* Disable console buffering */ 277 /* cnpollc(1);*/ 278 279 /* 280 * If RB_NOSYNC was not specified sync the discs. 281 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 282 * It looks like syslogd is getting woken up only to find that it cannot 283 * page part of the binary in as the filesystem has been unmounted. 284 */ 285 if (!(howto & RB_NOSYNC)) 286 bootsync(); 287 288 /* Say NO to interrupts */ 289 splhigh(); 290 291 /* Do a dump if requested. */ 292 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 293 dumpsys(); 294 295 /* Run any shutdown hooks */ 296 doshutdownhooks(); 297 298 /* Make sure IRQ's are disabled */ 299 IRQdisable; 300 301 if (howto & RB_HALT) { 302 printf("The operating system has halted.\n"); 303 printf("Please press any key to reboot.\n\n"); 304 cngetc(); 305 } 306 307 printf("rebooting...\n"); 308 ifpga_reset(); 309 /*NOTREACHED*/ 310 } 311 312 /* 313 * Mapping table for core kernel memory. This memory is mapped at init 314 * time with section mappings. 315 */ 316 struct l1_sec_map { 317 vm_offset_t va; 318 vm_offset_t pa; 319 vm_size_t size; 320 vm_prot_t prot; 321 int cache; 322 } l1_sec_table[] = { 323 #if NPLCOM > 0 && defined(PLCONSOLE) 324 { UART0_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART0, 1024 * 1024, 325 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE }, 326 { UART1_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART1, 1024 * 1024, 327 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE }, 328 #endif 329 #if NPCI > 0 330 { IFPGA_PCI_IO_VBASE, IFPGA_PCI_IO_BASE, IFPGA_PCI_IO_VSIZE, 331 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE }, 332 { IFPGA_PCI_CONF_VBASE, IFPGA_PCI_CONF_BASE, IFPGA_PCI_CONF_VSIZE, 333 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE }, 334 #endif 335 336 { 0, 0, 0, 0, 0 } 337 }; 338 339 /* 340 * u_int initarm(struct ebsaboot *bootinfo) 341 * 342 * Initial entry point on startup. This gets called before main() is 343 * entered. 344 * It should be responsible for setting up everything that must be 345 * in place when main is called. 346 * This includes 347 * Taking a copy of the boot configuration structure. 348 * Initialising the physical console so characters can be printed. 349 * Setting up page tables for the kernel 350 * Relocating the kernel to the bottom of physical memory 351 */ 352 353 u_int 354 initarm(bootinfo) 355 struct intbootinfo *bootinfo; 356 { 357 int loop; 358 int loop1; 359 u_int l1pagetable; 360 u_int l2pagetable; 361 extern char page0[], page0_end[]; 362 extern int etext asm ("_etext"); 363 extern int end asm ("_end"); 364 pv_addr_t kernel_l1pt; 365 pv_addr_t kernel_ptpt; 366 #if NPLCOM > 0 && defined(PLCONSOLE) 367 static struct bus_space plcom_bus_space; 368 #endif 369 370 371 #if 0 372 cn_tab = &kcomcons; 373 #endif 374 /* 375 * Heads up ... Setup the CPU / MMU / TLB functions 376 */ 377 if (set_cpufuncs()) 378 panic("cpu not recognized!"); 379 380 /* - intbootinfo.bt_memstart) / NBPG */; 381 382 #if NPLCOM > 0 && defined(PLCONSOLE) 383 /* 384 * Initialise the diagnostic serial console 385 * This allows a means of generating output during initarm(). 386 * Once all the memory map changes are complete we can call consinit() 387 * and not have to worry about things moving. 388 */ 389 390 if (PLCOMCNUNIT == 0) { 391 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 392 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 393 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 394 } else if (PLCOMCNUNIT == 1) { 395 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 396 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 397 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 398 } 399 #endif 400 401 /* Talk to the user */ 402 printf("\nNetBSD/integrator booting ...\n"); 403 404 #if 0 405 if (intbootinfo.bt_magic != BT_MAGIC_NUMBER_EBSA 406 && intbootinfo.bt_magic != BT_MAGIC_NUMBER_CATS) 407 panic("Incompatible magic number passed in boot args\n"); 408 #endif 409 410 /* { 411 int loop; 412 for (loop = 0; loop < 8; ++loop) { 413 printf("%08x\n", *(((int *)bootinfo)+loop)); 414 } 415 }*/ 416 417 /* 418 * Ok we have the following memory map 419 * 420 * virtual address == physical address apart from the areas: 421 * 0x00000000 -> 0x000fffff which is mapped to 422 * top 1MB of physical memory 423 * 0x00100000 -> 0x0fffffff which is mapped to 424 * physical addresses 0x00100000 -> 0x0fffffff 425 * 0x10000000 -> 0x1fffffff which is mapped to 426 * physical addresses 0x00000000 -> 0x0fffffff 427 * 0x20000000 -> 0xefffffff which is mapped to 428 * physical addresses 0x20000000 -> 0xefffffff 429 * 0xf0000000 -> 0xf03fffff which is mapped to 430 * physical addresses 0x00000000 -> 0x003fffff 431 * 432 * This means that the kernel is mapped suitably for continuing 433 * execution, all I/O is mapped 1:1 virtual to physical and 434 * physical memory is accessible. 435 * 436 * The initarm() has the responsibility for creating the kernel 437 * page tables. 438 * It must also set up various memory pointers that are used 439 * by pmap etc. 440 */ 441 442 /* 443 * Examine the boot args string for options we need to know about 444 * now. 445 */ 446 #if 0 447 process_kernel_args((char *)intbootinfo.bt_args); 448 #endif 449 450 printf("initarm: Configuring system ...\n"); 451 452 /* 453 * Set up the variables that define the availablilty of 454 * physical memory 455 */ 456 physical_start = 0 /*intbootinfo.bt_memstart*/; 457 physical_freestart = physical_start; 458 459 #if 0 460 physical_end = /*intbootinfo.bt_memend*/ /*intbootinfo.bi_nrpages * NBPG */ 32*1024*1024; 461 #else 462 { 463 volatile unsigned long *cm_sdram 464 = (volatile unsigned long *)0x10000020; 465 466 switch ((*cm_sdram >> 2) & 0x7) 467 { 468 case 0: 469 physical_end = 16 * 1024 * 1024; 470 break; 471 case 1: 472 physical_end = 32 * 1024 * 1024; 473 break; 474 case 2: 475 physical_end = 64 * 1024 * 1024; 476 break; 477 case 3: 478 physical_end = 128 * 1024 * 1024; 479 break; 480 case 4: 481 physical_end = 256 * 1024 * 1024; 482 break; 483 default: 484 printf("CM_SDRAM retuns unknown value, using 16M\n"); 485 physical_end = 16 * 1024 * 1024; 486 break; 487 } 488 } 489 #endif 490 491 physical_freeend = physical_end; 492 free_pages = (physical_end - physical_start) / NBPG; 493 494 /* Set up the bootconfig structure for the benefit of pmap.c */ 495 bootconfig.dramblocks = 1; 496 bootconfig.dram[0].address = physical_start; 497 bootconfig.dram[0].pages = free_pages; 498 499 physmem = (physical_end - physical_start) / NBPG; 500 501 /* Tell the user about the memory */ 502 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 503 physical_start, physical_end - 1); 504 505 /* 506 * Ok the kernel occupies the bottom of physical memory. 507 * The first free page after the kernel can be found in 508 * intbootinfo->bt_memavail 509 * We now need to allocate some fixed page tables to get the kernel 510 * going. 511 * We allocate one page directory and a number page tables and store 512 * the physical addresses in the kernel_pt_table array. 513 * 514 * Ok the next bit of physical allocation may look complex but it is 515 * simple really. I have done it like this so that no memory gets 516 * wasted during the allocation of various pages and tables that are 517 * all different sizes. 518 * The start addresses will be page aligned. 519 * We allocate the kernel page directory on the first free 16KB boundry 520 * we find. 521 * We allocate the kernel page tables on the first 4KB boundry we find. 522 * Since we allocate at least 3 L2 pagetables we know that we must 523 * encounter at least one 16KB aligned address. 524 */ 525 526 #ifdef VERBOSE_INIT_ARM 527 printf("Allocating page tables\n"); 528 #endif 529 530 /* Update the address of the first free 16KB chunk of physical memory */ 531 physical_freestart = ((uintptr_t) &end - KERNEL_TEXT_BASE + PGOFSET) 532 & ~PGOFSET; 533 #if 0 534 physical_freestart += (kernexec->a_syms + sizeof(int) 535 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)) 536 + (NBPG - 1)) & ~(NBPG - 1); 537 #endif 538 539 free_pages -= (physical_freestart - physical_start) / NBPG; 540 #ifdef VERBOSE_INIT_ARM 541 printf("freestart = %#lx, free_pages = %d (%#x)\n", 542 physical_freestart, free_pages, free_pages); 543 #endif 544 545 /* Define a macro to simplify memory allocation */ 546 #define valloc_pages(var, np) \ 547 alloc_pages((var).pv_pa, (np)); \ 548 (var).pv_va = KERNEL_TEXT_BASE + (var).pv_pa - physical_start; 549 550 #define alloc_pages(var, np) \ 551 (var) = physical_freestart; \ 552 physical_freestart += ((np) * NBPG); \ 553 free_pages -= (np); \ 554 memset((char *)(var), 0, ((np) * NBPG)); 555 556 loop1 = 0; 557 kernel_l1pt.pv_pa = 0; 558 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 559 /* Are we 16KB aligned for an L1 ? */ 560 if ((physical_freestart & (PD_SIZE - 1)) == 0 561 && kernel_l1pt.pv_pa == 0) { 562 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 563 } else { 564 alloc_pages(kernel_pt_table[loop1].pv_pa, 565 PT_SIZE / NBPG); 566 ++loop1; 567 kernel_pt_table[loop1].pv_va = 568 kernel_pt_table[loop1].pv_pa; 569 } 570 } 571 572 /* This should never be able to happen but better confirm that. */ 573 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0) 574 panic("initarm: Failed to align the kernel page directory\n"); 575 576 /* 577 * Allocate a page for the system page mapped to V0x00000000 578 * This page will just contain the system vectors and can be 579 * shared by all processes. 580 */ 581 alloc_pages(systempage.pv_pa, 1); 582 583 /* Allocate a page for the page table to map kernel page tables*/ 584 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 585 586 /* Allocate stacks for all modes */ 587 valloc_pages(irqstack, IRQ_STACK_SIZE); 588 valloc_pages(abtstack, ABT_STACK_SIZE); 589 valloc_pages(undstack, UND_STACK_SIZE); 590 valloc_pages(kernelstack, UPAGES); 591 592 #ifdef VERBOSE_INIT_ARM 593 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 594 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 595 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 596 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 597 #endif 598 599 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 600 601 /* 602 * Ok we have allocated physical pages for the primary kernel 603 * page tables 604 */ 605 606 #ifdef VERBOSE_INIT_ARM 607 printf("Creating L1 page table at %#lx\n", kernel_l1pt.pv_pa); 608 #endif 609 610 /* 611 * Now we start consturction of the L1 page table 612 * We start by mapping the L2 page tables into the L1. 613 * This means that we can replace L1 mappings later on if necessary 614 */ 615 l1pagetable = kernel_l1pt.pv_pa; 616 617 /* Map the L2 pages tables in the L1 page table */ 618 pmap_link_l2pt(l1pagetable, 0x00000000, 619 &kernel_pt_table[KERNEL_PT_SYS]); 620 pmap_link_l2pt(l1pagetable, KERNEL_BASE, 621 &kernel_pt_table[KERNEL_PT_KERNEL]); 622 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 623 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 624 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 625 pmap_link_l2pt(l1pagetable, PROCESS_PAGE_TBLS_BASE, 626 &kernel_ptpt); 627 628 #ifdef VERBOSE_INIT_ARM 629 printf("Mapping kernel\n"); 630 #endif 631 632 /* Now we fill in the L2 pagetable for the kernel static code/data */ 633 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL].pv_pa; 634 635 { 636 u_int logical; 637 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 638 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 639 640 /* Round down text size and round up total size 641 */ 642 textsize = textsize & ~PGOFSET; 643 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 644 /* logical = pmap_map_chunk(l1pagetable, 645 KERNEL_BASE, physical_start, KERNEL_TEXT_BASE - KERNEL_BASE, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); */ 647 logical = pmap_map_chunk(l1pagetable, 648 KERNEL_TEXT_BASE, physical_start, textsize, 649 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 650 logical += pmap_map_chunk(l1pagetable, 651 KERNEL_TEXT_BASE + logical, physical_start + logical, 652 totalsize - textsize, VM_PROT_READ|VM_PROT_WRITE, 653 PTE_CACHE); 654 #if 0 655 logical += pmap_map_chunk(l1pagetable, 656 KERNEL_BASE + logical, 657 physical_start + logical, kernexec->a_syms + sizeof(int) 658 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)), 659 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 660 #endif 661 } 662 663 #ifdef VERBOSE_INIT_ARM 664 printf("Constructing L2 page tables\n"); 665 #endif 666 667 /* Map the boot arguments page */ 668 #if 0 669 pmap_map_entry(l2pagetable, intbootinfo.bt_vargp, 670 intbootinfo.bt_pargp, VM_PROT_READ, PTE_CACHE); 671 #endif 672 673 /* Map the stack pages */ 674 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 675 IRQ_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 676 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 677 ABT_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 678 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 679 UND_STACK_SIZE * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 680 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 681 UPAGES * NBPG, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 682 683 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 684 PD_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 685 686 /* Map the page table that maps the kernel pages */ 687 pmap_map_entry(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa, 688 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 689 690 /* 691 * Map entries in the page table used to map PTE's 692 * Basically every kernel page table gets mapped here 693 */ 694 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 695 l2pagetable = kernel_ptpt.pv_pa; 696 pmap_map_entry(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 697 kernel_pt_table[KERNEL_PT_KERNEL].pv_pa, 698 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 699 pmap_map_entry(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 700 kernel_ptpt.pv_pa, 701 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 702 pmap_map_entry(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 703 kernel_pt_table[KERNEL_PT_SYS].pv_pa, 704 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 705 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 706 pmap_map_entry(l2pagetable, ((KERNEL_VM_BASE + 707 (loop * 0x00400000)) >> (PGSHIFT-2)), 708 kernel_pt_table[KERNEL_PT_VMDATA + loop].pv_pa, 709 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 710 711 /* 712 * Map the system page in the kernel page table for the bottom 1Meg 713 * of the virtual memory map. 714 */ 715 l2pagetable = kernel_pt_table[KERNEL_PT_SYS].pv_pa; 716 #if 1 717 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 718 the cache-clean code there. */ 719 pmap_map_entry(l2pagetable, 0x00000000, systempage.pv_pa, 720 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 721 #else 722 pmap_map_entry(l2pagetable, 0x00000000, systempage.pv_pa, 723 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 724 #endif 725 /* Map the core memory needed before autoconfig */ 726 loop = 0; 727 while (l1_sec_table[loop].size) { 728 vm_size_t sz; 729 730 #ifdef VERBOSE_INIT_ARM 731 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 732 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 733 l1_sec_table[loop].va); 734 #endif 735 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE) 736 pmap_map_section(l1pagetable, 737 l1_sec_table[loop].va + sz, 738 l1_sec_table[loop].pa + sz, 739 l1_sec_table[loop].prot, 740 l1_sec_table[loop].cache); 741 ++loop; 742 } 743 744 /* 745 * Now we have the real page tables in place so we can switch to them. 746 * Once this is done we will be running with the REAL kernel page tables. 747 */ 748 749 /* Switch tables */ 750 #ifdef VERBOSE_INIT_ARM 751 printf("freestart = %#lx, free_pages = %d (%#x)\n", 752 physical_freestart, free_pages, free_pages); 753 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 754 #endif 755 756 setttb(kernel_l1pt.pv_pa); 757 758 #ifdef VERBOSE_INIT_ARM 759 printf("done!\n"); 760 #endif 761 762 #ifdef PLCONSOLE 763 /* 764 * The IFPGA registers have just moved. 765 * Detach the diagnostic serial port and reattach at the new address. 766 */ 767 plcomcndetach(); 768 #endif 769 770 /* 771 * XXX this should only be done in main() but it useful to 772 * have output earlier ... 773 */ 774 consinit(); 775 776 #ifdef VERBOSE_INIT_ARM 777 printf("bootstrap done.\n"); 778 #endif 779 780 /* Right set up the vectors at the bottom of page 0 */ 781 memcpy((char *)0x00000000, page0, page0_end - page0); 782 783 /* We have modified a text page so sync the icache */ 784 cpu_icache_sync_all(); 785 786 /* 787 * Pages were allocated during the secondary bootstrap for the 788 * stacks for different CPU modes. 789 * We must now set the r13 registers in the different CPU modes to 790 * point to these stacks. 791 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 792 * of the stack memory. 793 */ 794 printf("init subsystems: stacks "); 795 796 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 797 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 798 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 799 800 /* 801 * Well we should set a data abort handler. 802 * Once things get going this will change as we will need a proper handler. 803 * Until then we will use a handler that just panics but tells us 804 * why. 805 * Initialisation of the vectors will just panic on a data abort. 806 * This just fills in a slighly better one. 807 */ 808 printf("vectors "); 809 data_abort_handler_address = (u_int)data_abort_handler; 810 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 811 undefined_handler_address = (u_int)undefinedinstruction_bounce; 812 813 /* At last ! 814 * We now have the kernel in physical memory from the bottom upwards. 815 * Kernel page tables are physically above this. 816 * The kernel is mapped to KERNEL_TEXT_BASE 817 * The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff 818 * The page tables are mapped to 0xefc00000 819 */ 820 821 /* Initialise the undefined instruction handlers */ 822 printf("undefined "); 823 undefined_init(); 824 825 /* Boot strap pmap telling it where the kernel page table is */ 826 printf("pmap "); 827 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 828 829 /* Setup the IRQ system */ 830 printf("irq "); 831 irq_init(); 832 833 printf("done.\n"); 834 835 #ifdef IPKDB 836 /* Initialise ipkdb */ 837 ipkdb_init(); 838 if (boothowto & RB_KDB) 839 ipkdb_connect(0); 840 #endif 841 842 #ifdef DDB 843 db_machine_init(); 844 845 /* Firmware doesn't load symbols. */ 846 ddb_init(0, NULL, NULL); 847 848 if (boothowto & RB_KDB) 849 Debugger(); 850 #endif 851 852 /* We return the new stack pointer address */ 853 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 854 } 855 856 void 857 process_kernel_args(args) 858 char *args; 859 { 860 861 boothowto = 0; 862 863 /* Make a local copy of the bootargs */ 864 strncpy(bootargs, args, MAX_BOOT_STRING); 865 866 args = bootargs; 867 boot_file = bootargs; 868 869 /* Skip the kernel image filename */ 870 while (*args != ' ' && *args != 0) 871 ++args; 872 873 if (*args != 0) 874 *args++ = 0; 875 876 while (*args == ' ') 877 ++args; 878 879 boot_args = args; 880 881 printf("bootfile: %s\n", boot_file); 882 printf("bootargs: %s\n", boot_args); 883 884 parse_mi_bootargs(boot_args); 885 } 886 887 void 888 consinit(void) 889 { 890 static int consinit_called = 0; 891 #if NPLCOM > 0 && defined(PLCONSOLE) 892 static struct bus_space plcom_bus_space; 893 #endif 894 #if 0 895 char *console = CONSDEVNAME; 896 #endif 897 898 if (consinit_called != 0) 899 return; 900 901 consinit_called = 1; 902 903 #if NPLCOM > 0 && defined(PLCONSOLE) 904 if (PLCOMCNUNIT == 0) { 905 ifpga_create_io_bs_tag(&plcom_bus_space, 906 (void*)UART0_BOOT_BASE); 907 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 908 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 909 panic("can't init serial console"); 910 return; 911 } else if (PLCOMCNUNIT == 1) { 912 ifpga_create_io_bs_tag(&plcom_bus_space, 913 (void*)UART0_BOOT_BASE); 914 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 915 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 916 panic("can't init serial console"); 917 return; 918 } 919 #endif 920 #if (NCOM > 0) 921 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 922 COM_FREQ, comcnmode)) 923 panic("can't init serial console @%x", CONCOMADDR); 924 return; 925 #endif 926 panic("No serial console configured"); 927 } 928 929 #if 0 930 static bus_space_handle_t kcom_base = (bus_space_handle_t) (DC21285_PCI_IO_VBASE + CONCOMADDR); 931 932 u_int8_t footbridge_bs_r_1(void *, bus_space_handle_t, bus_size_t); 933 void footbridge_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t); 934 935 #define KCOM_GETBYTE(r) footbridge_bs_r_1(0, kcom_base, (r)) 936 #define KCOM_PUTBYTE(r,v) footbridge_bs_w_1(0, kcom_base, (r), (v)) 937 938 static int 939 kcomcngetc(dev_t dev) 940 { 941 int stat, c; 942 943 /* block until a character becomes available */ 944 while (!ISSET(stat = KCOM_GETBYTE(com_lsr), LSR_RXRDY)) 945 ; 946 947 c = KCOM_GETBYTE(com_data); 948 stat = KCOM_GETBYTE(com_iir); 949 return c; 950 } 951 952 /* 953 * Console kernel output character routine. 954 */ 955 static void 956 kcomcnputc(dev_t dev, int c) 957 { 958 int timo; 959 960 /* wait for any pending transmission to finish */ 961 timo = 150000; 962 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 963 continue; 964 965 KCOM_PUTBYTE(com_data, c); 966 967 /* wait for this transmission to complete */ 968 timo = 1500000; 969 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 970 continue; 971 } 972 973 static void 974 kcomcnpollc(dev_t dev, int on) 975 { 976 } 977 978 struct consdev kcomcons = { 979 NULL, NULL, kcomcngetc, kcomcnputc, kcomcnpollc, NULL, 980 NODEV, CN_NORMAL 981 }; 982 983 #endif 984
Indexes created Mon Sep 29 21:09:56 GMT 2025