integrator_machdep.c revision 1.8
1 /* $NetBSD: integrator_machdep.c,v 1.8 2002/01/30 04:00:47 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 pt_entry_t kernel_pt_table[NUM_KERNEL_PTS]; 161 162 struct user *proc0paddr; 163 164 /* Prototypes */ 165 166 void consinit __P((void)); 167 168 void map_section __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa, 169 int cacheable)); 170 void map_pagetable __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 171 void map_entry __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 172 void map_entry_nc __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 173 void map_entry_ro __P((vm_offset_t pt, vm_offset_t va, vm_offset_t pa)); 174 vm_size_t map_chunk __P((vm_offset_t pd, vm_offset_t pt, vm_offset_t va, 175 vm_offset_t pa, vm_size_t size, u_int acc, 176 u_int flg)); 177 178 void process_kernel_args __P((char *)); 179 void data_abort_handler __P((trapframe_t *frame)); 180 void prefetch_abort_handler __P((trapframe_t *frame)); 181 void undefinedinstruction_bounce __P((trapframe_t *frame)); 182 extern void configure __P((void)); 183 extern void parse_mi_bootargs __P((char *args)); 184 extern void dumpsys __P((void)); 185 186 /* A load of console goo. */ 187 #include "vga.h" 188 #if (NVGA > 0) 189 #include <dev/ic/mc6845reg.h> 190 #include <dev/ic/pcdisplayvar.h> 191 #include <dev/ic/vgareg.h> 192 #include <dev/ic/vgavar.h> 193 #endif 194 195 #include "pckbc.h" 196 #if (NPCKBC > 0) 197 #include <dev/ic/i8042reg.h> 198 #include <dev/ic/pckbcvar.h> 199 #endif 200 201 #include "com.h" 202 #if (NCOM > 0) 203 #include <dev/ic/comreg.h> 204 #include <dev/ic/comvar.h> 205 #ifndef CONCOMADDR 206 #define CONCOMADDR 0x3f8 207 #endif 208 #endif 209 210 #define CONSPEED B115200 211 #ifndef CONSPEED 212 #define CONSPEED B9600 /* TTYDEF_SPEED */ 213 #endif 214 #ifndef CONMODE 215 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 216 #endif 217 218 int comcnspeed = CONSPEED; 219 int comcnmode = CONMODE; 220 221 #include "plcom.h" 222 #if (NPLCOM > 0) 223 #include <evbarm/dev/plcomreg.h> 224 #include <evbarm/dev/plcomvar.h> 225 226 #include <evbarm/ifpga/ifpgamem.h> 227 #include <evbarm/ifpga/ifpgareg.h> 228 #include <evbarm/ifpga/ifpgavar.h> 229 #endif 230 231 #ifndef CONSDEVNAME 232 #define CONSDEVNAME "plcom" 233 #endif 234 235 #ifndef PLCONSPEED 236 #define PLCONSPEED B38400 237 #endif 238 #ifndef PLCONMODE 239 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 240 #endif 241 #ifndef PLCOMCNUNIT 242 #define PLCOMCNUNIT -1 243 #endif 244 245 int plcomcnspeed = PLCONSPEED; 246 int plcomcnmode = PLCONMODE; 247 248 #if 0 249 extern struct consdev kcomcons; 250 static void kcomcnputc(dev_t, int); 251 #endif 252 253 /* 254 * void cpu_reboot(int howto, char *bootstr) 255 * 256 * Reboots the system 257 * 258 * Deal with any syncing, unmounting, dumping and shutdown hooks, 259 * then reset the CPU. 260 */ 261 262 void 263 cpu_reboot(howto, bootstr) 264 int howto; 265 char *bootstr; 266 { 267 #ifdef DIAGNOSTIC 268 /* info */ 269 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 270 #endif 271 272 /* 273 * If we are still cold then hit the air brakes 274 * and crash to earth fast 275 */ 276 if (cold) { 277 doshutdownhooks(); 278 printf("The operating system has halted.\n"); 279 printf("Please press any key to reboot.\n\n"); 280 cngetc(); 281 printf("rebooting...\n"); 282 ifpga_reset(); 283 /*NOTREACHED*/ 284 } 285 286 /* Disable console buffering */ 287 /* cnpollc(1);*/ 288 289 /* 290 * If RB_NOSYNC was not specified sync the discs. 291 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 292 * It looks like syslogd is getting woken up only to find that it cannot 293 * page part of the binary in as the filesystem has been unmounted. 294 */ 295 if (!(howto & RB_NOSYNC)) 296 bootsync(); 297 298 /* Say NO to interrupts */ 299 splhigh(); 300 301 /* Do a dump if requested. */ 302 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 303 dumpsys(); 304 305 /* Run any shutdown hooks */ 306 doshutdownhooks(); 307 308 /* Make sure IRQ's are disabled */ 309 IRQdisable; 310 311 if (howto & RB_HALT) { 312 printf("The operating system has halted.\n"); 313 printf("Please press any key to reboot.\n\n"); 314 cngetc(); 315 } 316 317 printf("rebooting...\n"); 318 ifpga_reset(); 319 /*NOTREACHED*/ 320 } 321 322 /* 323 * Mapping table for core kernel memory. This memory is mapped at init 324 * time with section mappings. 325 */ 326 struct l1_sec_map { 327 vm_offset_t va; 328 vm_offset_t pa; 329 vm_size_t size; 330 int flags; 331 } l1_sec_table[] = { 332 #if NPLCOM > 0 && defined(PLCONSOLE) 333 { UART0_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART0, 1024 * 1024, 0}, 334 { UART1_BOOT_BASE, IFPGA_IO_BASE + IFPGA_UART1, 1024 * 1024, 0}, 335 #endif 336 #if NPCI > 0 337 { IFPGA_PCI_IO_VBASE, IFPGA_PCI_IO_BASE, IFPGA_PCI_IO_VSIZE, 0}, 338 { IFPGA_PCI_CONF_VBASE, IFPGA_PCI_CONF_BASE, IFPGA_PCI_CONF_VSIZE, 0}, 339 #endif 340 341 { 0, 0, 0, 0 } 342 }; 343 344 /* 345 * u_int initarm(struct ebsaboot *bootinfo) 346 * 347 * Initial entry point on startup. This gets called before main() is 348 * entered. 349 * It should be responsible for setting up everything that must be 350 * in place when main is called. 351 * This includes 352 * Taking a copy of the boot configuration structure. 353 * Initialising the physical console so characters can be printed. 354 * Setting up page tables for the kernel 355 * Relocating the kernel to the bottom of physical memory 356 */ 357 358 u_int 359 initarm(bootinfo) 360 struct intbootinfo *bootinfo; 361 { 362 int loop; 363 int loop1; 364 u_int l1pagetable; 365 u_int l2pagetable; 366 extern char page0[], page0_end[]; 367 extern int etext asm ("_etext"); 368 extern int end asm ("_end"); 369 pv_addr_t kernel_l1pt; 370 pv_addr_t kernel_ptpt; 371 #if NPLCOM > 0 && defined(PLCONSOLE) 372 static struct bus_space plcom_bus_space; 373 #endif 374 375 376 #if 0 377 cn_tab = &kcomcons; 378 #endif 379 /* 380 * Heads up ... Setup the CPU / MMU / TLB functions 381 */ 382 if (set_cpufuncs()) 383 panic("cpu not recognized!"); 384 385 /* - intbootinfo.bt_memstart) / NBPG */; 386 387 #if NPLCOM > 0 && defined(PLCONSOLE) 388 /* 389 * Initialise the diagnostic serial console 390 * This allows a means of generating output during initarm(). 391 * Once all the memory map changes are complete we can call consinit() 392 * and not have to worry about things moving. 393 */ 394 395 if (PLCOMCNUNIT == 0) { 396 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 397 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 398 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 399 } else if (PLCOMCNUNIT == 1) { 400 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 401 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 402 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 403 } 404 #endif 405 406 /* Talk to the user */ 407 printf("\nNetBSD/integrator booting ...\n"); 408 409 #if 0 410 if (intbootinfo.bt_magic != BT_MAGIC_NUMBER_EBSA 411 && intbootinfo.bt_magic != BT_MAGIC_NUMBER_CATS) 412 panic("Incompatible magic number passed in boot args\n"); 413 #endif 414 415 /* { 416 int loop; 417 for (loop = 0; loop < 8; ++loop) { 418 printf("%08x\n", *(((int *)bootinfo)+loop)); 419 } 420 }*/ 421 422 /* 423 * Ok we have the following memory map 424 * 425 * virtual address == physical address apart from the areas: 426 * 0x00000000 -> 0x000fffff which is mapped to 427 * top 1MB of physical memory 428 * 0x00100000 -> 0x0fffffff which is mapped to 429 * physical addresses 0x00100000 -> 0x0fffffff 430 * 0x10000000 -> 0x1fffffff which is mapped to 431 * physical addresses 0x00000000 -> 0x0fffffff 432 * 0x20000000 -> 0xefffffff which is mapped to 433 * physical addresses 0x20000000 -> 0xefffffff 434 * 0xf0000000 -> 0xf03fffff which is mapped to 435 * physical addresses 0x00000000 -> 0x003fffff 436 * 437 * This means that the kernel is mapped suitably for continuing 438 * execution, all I/O is mapped 1:1 virtual to physical and 439 * physical memory is accessible. 440 * 441 * The initarm() has the responsibility for creating the kernel 442 * page tables. 443 * It must also set up various memory pointers that are used 444 * by pmap etc. 445 */ 446 447 /* 448 * Examine the boot args string for options we need to know about 449 * now. 450 */ 451 #if 0 452 process_kernel_args((char *)intbootinfo.bt_args); 453 #endif 454 455 printf("initarm: Configuring system ...\n"); 456 457 /* 458 * Set up the variables that define the availablilty of 459 * physical memory 460 */ 461 physical_start = 0 /*intbootinfo.bt_memstart*/; 462 physical_freestart = physical_start; 463 464 #if 0 465 physical_end = /*intbootinfo.bt_memend*/ /*intbootinfo.bi_nrpages * NBPG */ 32*1024*1024; 466 #else 467 { 468 volatile unsigned long *cm_sdram 469 = (volatile unsigned long *)0x10000020; 470 471 switch ((*cm_sdram >> 2) & 0x7) 472 { 473 case 0: 474 physical_end = 16 * 1024 * 1024; 475 break; 476 case 1: 477 physical_end = 32 * 1024 * 1024; 478 break; 479 case 2: 480 physical_end = 64 * 1024 * 1024; 481 break; 482 case 3: 483 physical_end = 128 * 1024 * 1024; 484 break; 485 case 4: 486 physical_end = 256 * 1024 * 1024; 487 break; 488 default: 489 printf("CM_SDRAM retuns unknown value, using 16M\n"); 490 physical_end = 16 * 1024 * 1024; 491 break; 492 } 493 } 494 #endif 495 496 physical_freeend = physical_end; 497 free_pages = (physical_end - physical_start) / NBPG; 498 499 /* Set up the bootconfig structure for the benefit of pmap.c */ 500 bootconfig.dramblocks = 1; 501 bootconfig.dram[0].address = physical_start; 502 bootconfig.dram[0].pages = free_pages; 503 504 physmem = (physical_end - physical_start) / NBPG; 505 506 /* Tell the user about the memory */ 507 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 508 physical_start, physical_end - 1); 509 510 /* 511 * Ok the kernel occupies the bottom of physical memory. 512 * The first free page after the kernel can be found in 513 * intbootinfo->bt_memavail 514 * We now need to allocate some fixed page tables to get the kernel 515 * going. 516 * We allocate one page directory and a number page tables and store 517 * the physical addresses in the kernel_pt_table array. 518 * 519 * Ok the next bit of physical allocation may look complex but it is 520 * simple really. I have done it like this so that no memory gets 521 * wasted during the allocation of various pages and tables that are 522 * all different sizes. 523 * The start addresses will be page aligned. 524 * We allocate the kernel page directory on the first free 16KB boundry 525 * we find. 526 * We allocate the kernel page tables on the first 4KB boundry we find. 527 * Since we allocate at least 3 L2 pagetables we know that we must 528 * encounter at least one 16KB aligned address. 529 */ 530 531 #ifdef VERBOSE_INIT_ARM 532 printf("Allocating page tables\n"); 533 #endif 534 535 /* Update the address of the first free 16KB chunk of physical memory */ 536 physical_freestart = ((uintptr_t) &end - KERNEL_TEXT_BASE + PGOFSET) 537 & ~PGOFSET; 538 #if 0 539 physical_freestart += (kernexec->a_syms + sizeof(int) 540 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)) 541 + (NBPG - 1)) & ~(NBPG - 1); 542 #endif 543 544 free_pages -= (physical_freestart - physical_start) / NBPG; 545 #ifdef VERBOSE_INIT_ARM 546 printf("freestart = %#lx, free_pages = %d (%#x)\n", 547 physical_freestart, free_pages, free_pages); 548 #endif 549 550 /* Define a macro to simplify memory allocation */ 551 #define valloc_pages(var, np) \ 552 alloc_pages((var).pv_pa, (np)); \ 553 (var).pv_va = KERNEL_TEXT_BASE + (var).pv_pa - physical_start; 554 555 #define alloc_pages(var, np) \ 556 (var) = physical_freestart; \ 557 physical_freestart += ((np) * NBPG); \ 558 free_pages -= (np); \ 559 memset((char *)(var), 0, ((np) * NBPG)); 560 561 loop1 = 0; 562 kernel_l1pt.pv_pa = 0; 563 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 564 /* Are we 16KB aligned for an L1 ? */ 565 if ((physical_freestart & (PD_SIZE - 1)) == 0 566 && kernel_l1pt.pv_pa == 0) { 567 valloc_pages(kernel_l1pt, PD_SIZE / NBPG); 568 } else { 569 alloc_pages(kernel_pt_table[loop1], PT_SIZE / NBPG); 570 ++loop1; 571 } 572 } 573 574 /* This should never be able to happen but better confirm that. */ 575 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (PD_SIZE-1)) != 0) 576 panic("initarm: Failed to align the kernel page directory\n"); 577 578 /* 579 * Allocate a page for the system page mapped to V0x00000000 580 * This page will just contain the system vectors and can be 581 * shared by all processes. 582 */ 583 alloc_pages(systempage.pv_pa, 1); 584 585 /* Allocate a page for the page table to map kernel page tables*/ 586 valloc_pages(kernel_ptpt, PT_SIZE / NBPG); 587 588 /* Allocate stacks for all modes */ 589 valloc_pages(irqstack, IRQ_STACK_SIZE); 590 valloc_pages(abtstack, ABT_STACK_SIZE); 591 valloc_pages(undstack, UND_STACK_SIZE); 592 valloc_pages(kernelstack, UPAGES); 593 594 #ifdef VERBOSE_INIT_ARM 595 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 596 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 597 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 598 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 599 #endif 600 601 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / NBPG); 602 603 /* 604 * Ok we have allocated physical pages for the primary kernel 605 * page tables 606 */ 607 608 #ifdef VERBOSE_INIT_ARM 609 printf("Creating L1 page table at %#lx\n", kernel_l1pt.pv_pa); 610 #endif 611 612 /* 613 * Now we start consturction of the L1 page table 614 * We start by mapping the L2 page tables into the L1. 615 * This means that we can replace L1 mappings later on if necessary 616 */ 617 l1pagetable = kernel_l1pt.pv_pa; 618 619 /* Map the L2 pages tables in the L1 page table */ 620 map_pagetable(l1pagetable, 0x00000000, 621 kernel_pt_table[KERNEL_PT_SYS]); 622 map_pagetable(l1pagetable, KERNEL_BASE, 623 kernel_pt_table[KERNEL_PT_KERNEL]); 624 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 625 map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 626 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 627 map_pagetable(l1pagetable, PROCESS_PAGE_TBLS_BASE, 628 kernel_ptpt.pv_pa); 629 630 #ifdef VERBOSE_INIT_ARM 631 printf("Mapping kernel\n"); 632 #endif 633 634 /* Now we fill in the L2 pagetable for the kernel static code/data */ 635 l2pagetable = kernel_pt_table[KERNEL_PT_KERNEL]; 636 637 { 638 u_int logical; 639 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 640 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 641 642 /* Round down text size and round up total size 643 */ 644 textsize = textsize & ~PGOFSET; 645 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 646 /* logical = map_chunk(l1pagetable, l2pagetable, KERNEL_BASE, 647 physical_start, KERNEL_TEXT_BASE - KERNEL_BASE, 648 AP_KRW, PT_CACHEABLE); */ 649 logical = map_chunk(l1pagetable, l2pagetable, 650 KERNEL_TEXT_BASE, physical_start, textsize, 651 AP_KRW, PT_CACHEABLE); 652 logical += map_chunk(l1pagetable, l2pagetable, 653 KERNEL_TEXT_BASE + logical, physical_start + logical, 654 totalsize - textsize, AP_KRW, PT_CACHEABLE); 655 #if 0 656 logical += map_chunk(0, l2pagetable, KERNEL_BASE + logical, 657 physical_start + logical, kernexec->a_syms + sizeof(int) 658 + *(u_int *)((int)end + kernexec->a_syms + sizeof(int)), 659 AP_KRW, PT_CACHEABLE); 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 map_entry_ro(l2pagetable, intbootinfo.bt_vargp, intbootinfo.bt_pargp); 670 #endif 671 672 /* Map the stack pages */ 673 map_chunk(0, l2pagetable, irqstack.pv_va, irqstack.pv_pa, 674 IRQ_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 675 map_chunk(0, l2pagetable, abtstack.pv_va, abtstack.pv_pa, 676 ABT_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 677 map_chunk(0, l2pagetable, undstack.pv_va, undstack.pv_pa, 678 UND_STACK_SIZE * NBPG, AP_KRW, PT_CACHEABLE); 679 map_chunk(0, l2pagetable, kernelstack.pv_va, kernelstack.pv_pa, 680 UPAGES * NBPG, AP_KRW, PT_CACHEABLE); 681 map_chunk(0, l2pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 682 PD_SIZE, AP_KRW, 0); 683 684 /* Map the page table that maps the kernel pages */ 685 map_entry_nc(l2pagetable, kernel_ptpt.pv_pa, kernel_ptpt.pv_pa); 686 687 /* 688 * Map entries in the page table used to map PTE's 689 * Basically every kernel page table gets mapped here 690 */ 691 /* The -2 is slightly bogus, it should be -log2(sizeof(pt_entry_t)) */ 692 l2pagetable = kernel_ptpt.pv_pa; 693 map_entry_nc(l2pagetable, (KERNEL_BASE >> (PGSHIFT-2)), 694 kernel_pt_table[KERNEL_PT_KERNEL]); 695 map_entry_nc(l2pagetable, (PROCESS_PAGE_TBLS_BASE >> (PGSHIFT-2)), 696 kernel_ptpt.pv_pa); 697 map_entry_nc(l2pagetable, (0x00000000 >> (PGSHIFT-2)), 698 kernel_pt_table[KERNEL_PT_SYS]); 699 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 700 map_entry_nc(l2pagetable, ((KERNEL_VM_BASE + 701 (loop * 0x00400000)) >> (PGSHIFT-2)), 702 kernel_pt_table[KERNEL_PT_VMDATA + loop]); 703 704 /* 705 * Map the system page in the kernel page table for the bottom 1Meg 706 * of the virtual memory map. 707 */ 708 l2pagetable = kernel_pt_table[KERNEL_PT_SYS]; 709 #if 1 710 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 711 the cache-clean code there. */ 712 map_entry_nc(l2pagetable, 0x00000000, systempage.pv_pa); 713 #else 714 map_entry_nc(l2pagetable, 0x00000000, systempage.pv_pa); 715 #endif 716 /* Map the core memory needed before autoconfig */ 717 loop = 0; 718 while (l1_sec_table[loop].size) { 719 vm_size_t sz; 720 721 #ifdef VERBOSE_INIT_ARM 722 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa, 723 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1, 724 l1_sec_table[loop].va); 725 #endif 726 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_SEC_SIZE) 727 map_section(l1pagetable, l1_sec_table[loop].va + sz, 728 l1_sec_table[loop].pa + sz, 729 l1_sec_table[loop].flags); 730 ++loop; 731 } 732 733 /* 734 * Now we have the real page tables in place so we can switch to them. 735 * Once this is done we will be running with the REAL kernel page tables. 736 */ 737 738 /* Switch tables */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("freestart = %#lx, free_pages = %d (%#x)\n", 741 physical_freestart, free_pages, free_pages); 742 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 743 #endif 744 745 setttb(kernel_l1pt.pv_pa); 746 747 #ifdef VERBOSE_INIT_ARM 748 printf("done!\n"); 749 #endif 750 751 #ifdef PLCONSOLE 752 /* 753 * The IFPGA registers have just moved. 754 * Detach the diagnostic serial port and reattach at the new address. 755 */ 756 plcomcndetach(); 757 #endif 758 759 /* 760 * XXX this should only be done in main() but it useful to 761 * have output earlier ... 762 */ 763 consinit(); 764 765 #ifdef VERBOSE_INIT_ARM 766 printf("bootstrap done.\n"); 767 #endif 768 769 /* Right set up the vectors at the bottom of page 0 */ 770 memcpy((char *)0x00000000, page0, page0_end - page0); 771 772 /* We have modified a text page so sync the icache */ 773 cpu_icache_sync_all(); 774 775 /* 776 * Pages were allocated during the secondary bootstrap for the 777 * stacks for different CPU modes. 778 * We must now set the r13 registers in the different CPU modes to 779 * point to these stacks. 780 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 781 * of the stack memory. 782 */ 783 printf("init subsystems: stacks "); 784 785 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * NBPG); 786 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * NBPG); 787 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * NBPG); 788 789 /* 790 * Well we should set a data abort handler. 791 * Once things get going this will change as we will need a proper handler. 792 * Until then we will use a handler that just panics but tells us 793 * why. 794 * Initialisation of the vectors will just panic on a data abort. 795 * This just fills in a slighly better one. 796 */ 797 printf("vectors "); 798 data_abort_handler_address = (u_int)data_abort_handler; 799 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 800 undefined_handler_address = (u_int)undefinedinstruction_bounce; 801 802 /* At last ! 803 * We now have the kernel in physical memory from the bottom upwards. 804 * Kernel page tables are physically above this. 805 * The kernel is mapped to KERNEL_TEXT_BASE 806 * The kernel data PTs will handle the mapping of 0xf1000000-0xf3ffffff 807 * The page tables are mapped to 0xefc00000 808 */ 809 810 /* Initialise the undefined instruction handlers */ 811 printf("undefined "); 812 undefined_init(); 813 814 /* Boot strap pmap telling it where the kernel page table is */ 815 printf("pmap "); 816 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, kernel_ptpt); 817 818 /* Setup the IRQ system */ 819 printf("irq "); 820 irq_init(); 821 822 printf("done.\n"); 823 824 #ifdef IPKDB 825 /* Initialise ipkdb */ 826 ipkdb_init(); 827 if (boothowto & RB_KDB) 828 ipkdb_connect(0); 829 #endif 830 831 #ifdef DDB 832 db_machine_init(); 833 834 /* Firmware doesn't load symbols. */ 835 ddb_init(0, NULL, NULL); 836 837 if (boothowto & RB_KDB) 838 Debugger(); 839 #endif 840 841 /* We return the new stack pointer address */ 842 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 843 } 844 845 void 846 process_kernel_args(args) 847 char *args; 848 { 849 850 boothowto = 0; 851 852 /* Make a local copy of the bootargs */ 853 strncpy(bootargs, args, MAX_BOOT_STRING); 854 855 args = bootargs; 856 boot_file = bootargs; 857 858 /* Skip the kernel image filename */ 859 while (*args != ' ' && *args != 0) 860 ++args; 861 862 if (*args != 0) 863 *args++ = 0; 864 865 while (*args == ' ') 866 ++args; 867 868 boot_args = args; 869 870 printf("bootfile: %s\n", boot_file); 871 printf("bootargs: %s\n", boot_args); 872 873 parse_mi_bootargs(boot_args); 874 } 875 876 void 877 consinit(void) 878 { 879 static int consinit_called = 0; 880 #if NPLCOM > 0 && defined(PLCONSOLE) 881 static struct bus_space plcom_bus_space; 882 #endif 883 #if 0 884 char *console = CONSDEVNAME; 885 #endif 886 887 if (consinit_called != 0) 888 return; 889 890 consinit_called = 1; 891 892 #if NPLCOM > 0 && defined(PLCONSOLE) 893 if (PLCOMCNUNIT == 0) { 894 ifpga_create_io_bs_tag(&plcom_bus_space, 895 (void*)UART0_BOOT_BASE); 896 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 897 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 898 panic("can't init serial console"); 899 return; 900 } else if (PLCOMCNUNIT == 1) { 901 ifpga_create_io_bs_tag(&plcom_bus_space, 902 (void*)UART0_BOOT_BASE); 903 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 904 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 905 panic("can't init serial console"); 906 return; 907 } 908 #endif 909 #if (NCOM > 0) 910 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 911 COM_FREQ, comcnmode)) 912 panic("can't init serial console @%x", CONCOMADDR); 913 return; 914 #endif 915 panic("No serial console configured"); 916 } 917 918 #if 0 919 static bus_space_handle_t kcom_base = (bus_space_handle_t) (DC21285_PCI_IO_VBASE + CONCOMADDR); 920 921 u_int8_t footbridge_bs_r_1(void *, bus_space_handle_t, bus_size_t); 922 void footbridge_bs_w_1(void *, bus_space_handle_t, bus_size_t, u_int8_t); 923 924 #define KCOM_GETBYTE(r) footbridge_bs_r_1(0, kcom_base, (r)) 925 #define KCOM_PUTBYTE(r,v) footbridge_bs_w_1(0, kcom_base, (r), (v)) 926 927 static int 928 kcomcngetc(dev_t dev) 929 { 930 int stat, c; 931 932 /* block until a character becomes available */ 933 while (!ISSET(stat = KCOM_GETBYTE(com_lsr), LSR_RXRDY)) 934 ; 935 936 c = KCOM_GETBYTE(com_data); 937 stat = KCOM_GETBYTE(com_iir); 938 return c; 939 } 940 941 /* 942 * Console kernel output character routine. 943 */ 944 static void 945 kcomcnputc(dev_t dev, int c) 946 { 947 int timo; 948 949 /* wait for any pending transmission to finish */ 950 timo = 150000; 951 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 952 continue; 953 954 KCOM_PUTBYTE(com_data, c); 955 956 /* wait for this transmission to complete */ 957 timo = 1500000; 958 while (!ISSET(KCOM_GETBYTE(com_lsr), LSR_TXRDY) && --timo) 959 continue; 960 } 961 962 static void 963 kcomcnpollc(dev_t dev, int on) 964 { 965 } 966 967 struct consdev kcomcons = { 968 NULL, NULL, kcomcngetc, kcomcnputc, kcomcnpollc, NULL, 969 NODEV, CN_NORMAL 970 }; 971 972 #endif 973
Indexes created Mon Sep 29 21:09:56 GMT 2025