integrator_machdep.c revision 1.46
1 /* $NetBSD: integrator_machdep.c,v 1.46 2003/09/06 10:28:26 rearnsha Exp $ */ 2 3 /* 4 * Copyright (c) 2001,2002 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 ARM LTD ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1997,1998 Mark Brinicombe. 34 * Copyright (c) 1997,1998 Causality Limited. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by Mark Brinicombe 48 * for the NetBSD Project. 49 * 4. The name of the company nor the name of the author may be used to 50 * endorse or promote products derived from this software without specific 51 * prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * Machine dependant functions for kernel setup for integrator board 66 * 67 * Created : 24/11/97 68 */ 69 70 #include <sys/cdefs.h> 71 __KERNEL_RCSID(0, "$NetBSD: integrator_machdep.c,v 1.46 2003/09/06 10:28:26 rearnsha Exp $"); 72 73 #include "opt_ddb.h" 74 #include "opt_pmap_debug.h" 75 76 #include <sys/param.h> 77 #include <sys/device.h> 78 #include <sys/systm.h> 79 #include <sys/kernel.h> 80 #include <sys/exec.h> 81 #include <sys/proc.h> 82 #include <sys/msgbuf.h> 83 #include <sys/reboot.h> 84 #include <sys/termios.h> 85 #include <sys/ksyms.h> 86 87 #include <uvm/uvm_extern.h> 88 89 #include <dev/cons.h> 90 91 #include <machine/db_machdep.h> 92 #include <ddb/db_sym.h> 93 #include <ddb/db_extern.h> 94 95 #include <machine/bootconfig.h> 96 #include <machine/bus.h> 97 #include <machine/cpu.h> 98 #include <machine/frame.h> 99 #include <machine/intr.h> 100 #include <evbarm/ifpga/irqhandler.h> /* XXX XXX XXX */ 101 #include <arm/undefined.h> 102 103 #include <arm/arm32/machdep.h> 104 105 #include <evbarm/integrator/integrator_boot.h> 106 107 #include "opt_ipkdb.h" 108 #include "pci.h" 109 #include "ksyms.h" 110 111 void ifpga_reset(void) __attribute__((noreturn)); 112 113 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 114 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 115 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 116 117 /* 118 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 119 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 120 */ 121 #define KERNEL_VM_SIZE 0x0C000000 122 123 /* 124 * Address to call from cpu_reset() to reset the machine. 125 * This is machine architecture dependant as it varies depending 126 * on where the ROM appears when you turn the MMU off. 127 */ 128 129 u_int cpu_reset_address = (u_int) ifpga_reset; 130 131 /* Define various stack sizes in pages */ 132 #define IRQ_STACK_SIZE 1 133 #define ABT_STACK_SIZE 1 134 #ifdef IPKDB 135 #define UND_STACK_SIZE 2 136 #else 137 #define UND_STACK_SIZE 1 138 #endif 139 140 BootConfig bootconfig; /* Boot config storage */ 141 char *boot_args = NULL; 142 char *boot_file = NULL; 143 144 vm_offset_t physical_start; 145 vm_offset_t physical_freestart; 146 vm_offset_t physical_freeend; 147 vm_offset_t physical_end; 148 u_int free_pages; 149 vm_offset_t pagetables_start; 150 int physmem = 0; 151 152 /*int debug_flags;*/ 153 #ifndef PMAP_STATIC_L1S 154 int max_processes = 64; /* Default number */ 155 #endif /* !PMAP_STATIC_L1S */ 156 157 /* Physical and virtual addresses for some global pages */ 158 pv_addr_t systempage; 159 pv_addr_t irqstack; 160 pv_addr_t undstack; 161 pv_addr_t abtstack; 162 pv_addr_t kernelstack; 163 164 vm_offset_t msgbufphys; 165 166 extern u_int data_abort_handler_address; 167 extern u_int prefetch_abort_handler_address; 168 extern u_int undefined_handler_address; 169 170 #ifdef PMAP_DEBUG 171 extern int pmap_debug_level; 172 #endif 173 174 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 175 176 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 177 #define KERNEL_PT_KERNEL_NUM 2 178 /* L2 tables for mapping kernel VM */ 179 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 180 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 181 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 182 183 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 184 185 struct user *proc0paddr; 186 187 /* Prototypes */ 188 189 static void integrator_sdram_bounds (paddr_t *, psize_t *); 190 191 void consinit(void); 192 193 /* A load of console goo. */ 194 #include "vga.h" 195 #if NVGA > 0 196 #include <dev/ic/mc6845reg.h> 197 #include <dev/ic/pcdisplayvar.h> 198 #include <dev/ic/vgareg.h> 199 #include <dev/ic/vgavar.h> 200 #endif 201 202 #include "pckbc.h" 203 #if NPCKBC > 0 204 #include <dev/ic/i8042reg.h> 205 #include <dev/ic/pckbcvar.h> 206 #endif 207 208 #include "com.h" 209 #if NCOM > 0 210 #include <dev/ic/comreg.h> 211 #include <dev/ic/comvar.h> 212 #ifndef CONCOMADDR 213 #define CONCOMADDR 0x3f8 214 #endif 215 #endif 216 217 /* 218 * Define the default console speed for the board. This is generally 219 * what the firmware provided with the board defaults to. 220 */ 221 #ifndef CONSPEED 222 #define CONSPEED B115200 223 #endif 224 #ifndef CONMODE 225 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 226 #endif 227 228 int comcnspeed = CONSPEED; 229 int comcnmode = CONMODE; 230 231 #include "plcom.h" 232 #if (NPLCOM > 0) 233 #include <evbarm/dev/plcomreg.h> 234 #include <evbarm/dev/plcomvar.h> 235 236 #include <evbarm/ifpga/ifpgamem.h> 237 #include <evbarm/ifpga/ifpgareg.h> 238 #include <evbarm/ifpga/ifpgavar.h> 239 #endif 240 241 #ifndef CONSDEVNAME 242 #define CONSDEVNAME "plcom" 243 #endif 244 245 #ifndef PLCONSPEED 246 #define PLCONSPEED B38400 247 #endif 248 #ifndef PLCONMODE 249 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 250 #endif 251 #ifndef PLCOMCNUNIT 252 #define PLCOMCNUNIT -1 253 #endif 254 255 int plcomcnspeed = PLCONSPEED; 256 int plcomcnmode = PLCONMODE; 257 258 #if 0 259 extern struct consdev kcomcons; 260 static void kcomcnputc(dev_t, int); 261 #endif 262 263 /* 264 * void cpu_reboot(int howto, char *bootstr) 265 * 266 * Reboots the system 267 * 268 * Deal with any syncing, unmounting, dumping and shutdown hooks, 269 * then reset the CPU. 270 */ 271 void 272 cpu_reboot(int howto, char *bootstr) 273 { 274 275 /* 276 * If we are still cold then hit the air brakes 277 * and crash to earth fast 278 */ 279 if (cold) { 280 doshutdownhooks(); 281 printf("The operating system has halted.\n"); 282 printf("Please press any key to reboot.\n\n"); 283 cngetc(); 284 printf("rebooting...\n"); 285 ifpga_reset(); 286 /*NOTREACHED*/ 287 } 288 289 /* Disable console buffering */ 290 291 /* 292 * If RB_NOSYNC was not specified sync the discs. 293 * Note: Unless cold is set to 1 here, syslogd will die during the 294 * unmount. It looks like syslogd is getting woken up only to find 295 * that it cannot page part of the binary in as the filesystem has 296 * been unmounted. 297 */ 298 if (!(howto & RB_NOSYNC)) 299 bootsync(); 300 301 /* Say NO to interrupts */ 302 splhigh(); 303 304 /* Do a dump if requested. */ 305 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 306 dumpsys(); 307 308 /* Run any shutdown hooks */ 309 doshutdownhooks(); 310 311 /* Make sure IRQ's are disabled */ 312 IRQdisable; 313 314 if (howto & RB_HALT) { 315 printf("The operating system has halted.\n"); 316 printf("Please press any key to reboot.\n\n"); 317 cngetc(); 318 } 319 320 printf("rebooting...\n"); 321 ifpga_reset(); 322 /*NOTREACHED*/ 323 } 324 325 /* Statically mapped devices. */ 326 static const struct pmap_devmap integrator_devmap[] = { 327 #if NPLCOM > 0 && defined(PLCONSOLE) 328 { 329 UART0_BOOT_BASE, 330 IFPGA_IO_BASE + IFPGA_UART0, 331 1024 * 1024, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE 334 }, 335 336 { 337 UART1_BOOT_BASE, 338 IFPGA_IO_BASE + IFPGA_UART1, 339 1024 * 1024, 340 VM_PROT_READ|VM_PROT_WRITE, 341 PTE_NOCACHE 342 }, 343 #endif 344 #if NPCI > 0 345 { 346 IFPGA_PCI_IO_VBASE, 347 IFPGA_PCI_IO_BASE, 348 IFPGA_PCI_IO_VSIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE 351 }, 352 353 { 354 IFPGA_PCI_CONF_VBASE, 355 IFPGA_PCI_CONF_BASE, 356 IFPGA_PCI_CONF_VSIZE, 357 VM_PROT_READ|VM_PROT_WRITE, 358 PTE_NOCACHE 359 }, 360 #endif 361 362 { 363 0, 364 0, 365 0, 366 0, 367 0 368 } 369 }; 370 371 /* 372 * u_int initarm(...) 373 * 374 * Initial entry point on startup. This gets called before main() is 375 * entered. 376 * It should be responsible for setting up everything that must be 377 * in place when main is called. 378 * This includes 379 * Taking a copy of the boot configuration structure. 380 * Initialising the physical console so characters can be printed. 381 * Setting up page tables for the kernel 382 * Relocating the kernel to the bottom of physical memory 383 */ 384 385 u_int 386 initarm(void *arg) 387 { 388 int loop; 389 int loop1; 390 u_int l1pagetable; 391 extern int etext asm ("_etext"); 392 extern int end asm ("_end"); 393 pv_addr_t kernel_l1pt; 394 paddr_t memstart; 395 psize_t memsize; 396 #if NPLCOM > 0 && defined(PLCONSOLE) 397 static struct bus_space plcom_bus_space; 398 #endif 399 400 /* 401 * Heads up ... Setup the CPU / MMU / TLB functions 402 */ 403 if (set_cpufuncs()) 404 panic("cpu not recognized!"); 405 406 #if NPLCOM > 0 && defined(PLCONSOLE) 407 /* 408 * Initialise the diagnostic serial console 409 * This allows a means of generating output during initarm(). 410 * Once all the memory map changes are complete we can call consinit() 411 * and not have to worry about things moving. 412 */ 413 414 if (PLCOMCNUNIT == 0) { 415 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 416 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 417 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 418 } else if (PLCOMCNUNIT == 1) { 419 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 420 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 421 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 422 } 423 #endif 424 425 #ifdef VERBOSE_INIT_ARM 426 /* Talk to the user */ 427 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 428 #endif 429 430 /* 431 * Ok we have the following memory map 432 * 433 * XXX NO WE DON'T 434 * 435 * virtual address == physical address apart from the areas: 436 * 0x00000000 -> 0x000fffff which is mapped to 437 * top 1MB of physical memory 438 * 0x00100000 -> 0x0fffffff which is mapped to 439 * physical addresses 0x00100000 -> 0x0fffffff 440 * 0x10000000 -> 0x1fffffff which is mapped to 441 * physical addresses 0x00000000 -> 0x0fffffff 442 * 0x20000000 -> 0xefffffff which is mapped to 443 * physical addresses 0x20000000 -> 0xefffffff 444 * 0xf0000000 -> 0xf03fffff which is mapped to 445 * physical addresses 0x00000000 -> 0x003fffff 446 * 447 * This means that the kernel is mapped suitably for continuing 448 * execution, all I/O is mapped 1:1 virtual to physical and 449 * physical memory is accessible. 450 * 451 * The initarm() has the responsibility for creating the kernel 452 * page tables. 453 * It must also set up various memory pointers that are used 454 * by pmap etc. 455 */ 456 457 /* 458 * Fetch the SDRAM start/size from the CM configuration registers. 459 */ 460 integrator_sdram_bounds(&memstart, &memsize); 461 462 #ifdef VERBOSE_INIT_ARM 463 printf("initarm: Configuring system ...\n"); 464 #endif 465 466 /* Fake bootconfig structure for the benefit of pmap.c */ 467 /* XXX must make the memory description h/w independent */ 468 bootconfig.dramblocks = 1; 469 bootconfig.dram[0].address = memstart; 470 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 471 472 /* 473 * Set up the variables that define the availablilty of 474 * physical memory. For now, we're going to set 475 * physical_freestart to 0x00200000 (where the kernel 476 * was loaded), and allocate the memory we need downwards. 477 * If we get too close to the L1 table that we set up, we 478 * will panic. We will update physical_freestart and 479 * physical_freeend later to reflect what pmap_bootstrap() 480 * wants to see. 481 * 482 * XXX pmap_bootstrap() needs an enema. 483 */ 484 physical_start = bootconfig.dram[0].address; 485 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 486 487 physical_freestart = 0x00009000UL; 488 physical_freeend = 0x00200000UL; 489 490 physmem = (physical_end - physical_start) / PAGE_SIZE; 491 492 #ifdef VERBOSE_INIT_ARM 493 /* Tell the user about the memory */ 494 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 495 physical_start, physical_end - 1); 496 #endif 497 498 /* 499 * Okay, the kernel starts 2MB in from the bottom of physical 500 * memory. We are going to allocate our bootstrap pages downwards 501 * from there. 502 * 503 * We need to allocate some fixed page tables to get the kernel 504 * going. We allocate one page directory and a number of page 505 * tables and store the physical addresses in the kernel_pt_table 506 * array. 507 * 508 * The kernel page directory must be on a 16K boundary. The page 509 * tables must be on 4K bounaries. What we do is allocate the 510 * page directory on the first 16K boundary that we encounter, and 511 * the page tables on 4K boundaries otherwise. Since we allocate 512 * at least 3 L2 page tables, we are guaranteed to encounter at 513 * least one 16K aligned region. 514 */ 515 516 #ifdef VERBOSE_INIT_ARM 517 printf("Allocating page tables\n"); 518 #endif 519 520 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 521 522 #ifdef VERBOSE_INIT_ARM 523 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 524 physical_freestart, free_pages, free_pages); 525 #endif 526 527 /* Define a macro to simplify memory allocation */ 528 #define valloc_pages(var, np) \ 529 alloc_pages((var).pv_pa, (np)); \ 530 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 531 532 #define alloc_pages(var, np) \ 533 physical_freeend -= ((np) * PAGE_SIZE); \ 534 if (physical_freeend < physical_freestart) \ 535 panic("initarm: out of memory"); \ 536 (var) = physical_freeend; \ 537 free_pages -= (np); \ 538 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 539 540 loop1 = 0; 541 kernel_l1pt.pv_pa = 0; 542 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 543 /* Are we 16KB aligned for an L1 ? */ 544 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 545 && kernel_l1pt.pv_pa == 0) { 546 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 547 } else { 548 valloc_pages(kernel_pt_table[loop1], 549 L2_TABLE_SIZE / PAGE_SIZE); 550 ++loop1; 551 } 552 } 553 554 /* This should never be able to happen but better confirm that. */ 555 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 556 panic("initarm: Failed to align the kernel page directory"); 557 558 /* 559 * Allocate a page for the system page mapped to V0x00000000 560 * This page will just contain the system vectors and can be 561 * shared by all processes. 562 */ 563 alloc_pages(systempage.pv_pa, 1); 564 565 /* Allocate stacks for all modes */ 566 valloc_pages(irqstack, IRQ_STACK_SIZE); 567 valloc_pages(abtstack, ABT_STACK_SIZE); 568 valloc_pages(undstack, UND_STACK_SIZE); 569 valloc_pages(kernelstack, UPAGES); 570 571 #ifdef VERBOSE_INIT_ARM 572 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 573 irqstack.pv_va); 574 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 575 abtstack.pv_va); 576 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 577 undstack.pv_va); 578 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 579 kernelstack.pv_va); 580 #endif 581 582 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 583 584 /* 585 * Ok we have allocated physical pages for the primary kernel 586 * page tables 587 */ 588 589 #ifdef VERBOSE_INIT_ARM 590 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 591 #endif 592 593 /* 594 * Now we start construction of the L1 page table 595 * We start by mapping the L2 page tables into the L1. 596 * This means that we can replace L1 mappings later on if necessary 597 */ 598 l1pagetable = kernel_l1pt.pv_pa; 599 600 /* Map the L2 pages tables in the L1 page table */ 601 pmap_link_l2pt(l1pagetable, 0x00000000, 602 &kernel_pt_table[KERNEL_PT_SYS]); 603 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 604 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 605 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 606 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 607 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 608 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 609 610 /* update the top of the kernel VM */ 611 pmap_curmaxkvaddr = 612 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 613 614 #ifdef VERBOSE_INIT_ARM 615 printf("Mapping kernel\n"); 616 #endif 617 618 /* Now we fill in the L2 pagetable for the kernel static code/data */ 619 { 620 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 621 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 622 u_int logical; 623 624 textsize = (textsize + PGOFSET) & ~PGOFSET; 625 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 626 627 logical = 0x00200000; /* offset of kernel in RAM */ 628 629 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 630 physical_start + logical, textsize, 631 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 633 physical_start + logical, totalsize - textsize, 634 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 635 } 636 637 #ifdef VERBOSE_INIT_ARM 638 printf("Constructing L2 page tables\n"); 639 #endif 640 641 /* Map the stack pages */ 642 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 643 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 644 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 645 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 646 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 647 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 648 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 649 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 650 651 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 652 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 653 654 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 655 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 656 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 657 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 658 } 659 660 /* Map the vector page. */ 661 #if 1 662 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 663 the cache-clean code there. */ 664 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 665 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 666 #else 667 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 668 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 669 #endif 670 671 /* Map the statically mapped devices. */ 672 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 673 674 /* 675 * Now we have the real page tables in place so we can switch to them. 676 * Once this is done we will be running with the REAL kernel page 677 * tables. 678 */ 679 680 /* 681 * Update the physical_freestart/physical_freeend/free_pages 682 * variables. 683 */ 684 { 685 physical_freestart = physical_start + 686 (((((uintptr_t) &end) + PGOFSET) & ~PGOFSET) - 687 KERNEL_BASE); 688 physical_freeend = physical_end; 689 free_pages = 690 (physical_freeend - physical_freestart) / PAGE_SIZE; 691 } 692 693 /* Switch tables */ 694 #ifdef VERBOSE_INIT_ARM 695 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 696 physical_freestart, free_pages, free_pages); 697 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 698 #endif 699 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 700 setttb(kernel_l1pt.pv_pa); 701 cpu_tlb_flushID(); 702 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 703 704 /* 705 * Moved from cpu_startup() as data_abort_handler() references 706 * this during uvm init 707 */ 708 proc0paddr = (struct user *)kernelstack.pv_va; 709 lwp0.l_addr = proc0paddr; 710 711 #ifdef PLCONSOLE 712 /* 713 * The IFPGA registers have just moved. 714 * Detach the diagnostic serial port and reattach at the new address. 715 */ 716 plcomcndetach(); 717 #endif 718 719 /* 720 * XXX this should only be done in main() but it useful to 721 * have output earlier ... 722 */ 723 consinit(); 724 725 #ifdef VERBOSE_INIT_ARM 726 printf("bootstrap done.\n"); 727 #endif 728 729 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 730 731 /* 732 * Pages were allocated during the secondary bootstrap for the 733 * stacks for different CPU modes. 734 * We must now set the r13 registers in the different CPU modes to 735 * point to these stacks. 736 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 737 * of the stack memory. 738 */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("init subsystems: stacks "); 741 #endif 742 743 set_stackptr(PSR_IRQ32_MODE, 744 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 745 set_stackptr(PSR_ABT32_MODE, 746 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 747 set_stackptr(PSR_UND32_MODE, 748 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 749 750 /* 751 * Well we should set a data abort handler. 752 * Once things get going this will change as we will need a proper 753 * handler. 754 * Until then we will use a handler that just panics but tells us 755 * why. 756 * Initialisation of the vectors will just panic on a data abort. 757 * This just fills in a slighly better one. 758 */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("vectors "); 761 #endif 762 data_abort_handler_address = (u_int)data_abort_handler; 763 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 764 undefined_handler_address = (u_int)undefinedinstruction_bounce; 765 766 /* Initialise the undefined instruction handlers */ 767 #ifdef VERBOSE_INIT_ARM 768 printf("undefined "); 769 #endif 770 undefined_init(); 771 772 /* Load memory into UVM. */ 773 #ifdef VERBOSE_INIT_ARM 774 printf("page "); 775 #endif 776 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 777 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 778 atop(physical_freestart), atop(physical_freeend), 779 VM_FREELIST_DEFAULT); 780 781 /* Boot strap pmap telling it where the kernel page table is */ 782 #ifdef VERBOSE_INIT_ARM 783 printf("pmap "); 784 #endif 785 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 786 KERNEL_VM_BASE + KERNEL_VM_SIZE); 787 788 /* Setup the IRQ system */ 789 #ifdef VERBOSE_INIT_ARM 790 printf("irq "); 791 #endif 792 irq_init(); 793 794 #ifdef VERBOSE_INIT_ARM 795 printf("done.\n"); 796 #endif 797 798 #ifdef IPKDB 799 /* Initialise ipkdb */ 800 ipkdb_init(); 801 if (boothowto & RB_KDB) 802 ipkdb_connect(0); 803 #endif 804 805 #if NKSYMS || defined(DDB) || defined(LKM) 806 /* Firmware doesn't load symbols. */ 807 ksyms_init(0, NULL, NULL); 808 #endif 809 810 #ifdef DDB 811 db_machine_init(); 812 if (boothowto & RB_KDB) 813 Debugger(); 814 #endif 815 816 /* We return the new stack pointer address */ 817 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 818 } 819 820 void 821 consinit(void) 822 { 823 static int consinit_called = 0; 824 #if NPLCOM > 0 && defined(PLCONSOLE) 825 static struct bus_space plcom_bus_space; 826 #endif 827 #if 0 828 char *console = CONSDEVNAME; 829 #endif 830 831 if (consinit_called != 0) 832 return; 833 834 consinit_called = 1; 835 836 #if NPLCOM > 0 && defined(PLCONSOLE) 837 if (PLCOMCNUNIT == 0) { 838 ifpga_create_io_bs_tag(&plcom_bus_space, 839 (void*)UART0_BOOT_BASE); 840 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 841 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 842 panic("can't init serial console"); 843 return; 844 } else if (PLCOMCNUNIT == 1) { 845 ifpga_create_io_bs_tag(&plcom_bus_space, 846 (void*)UART0_BOOT_BASE); 847 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 848 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 849 panic("can't init serial console"); 850 return; 851 } 852 #endif 853 #if (NCOM > 0) 854 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 855 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 856 panic("can't init serial console @%x", CONCOMADDR); 857 return; 858 #endif 859 panic("No serial console configured"); 860 } 861 862 static void 863 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 864 { 865 volatile unsigned long *cm_sdram 866 = (volatile unsigned long *)0x10000020; 867 volatile unsigned long *cm_stat 868 = (volatile unsigned long *)0x10000010; 869 870 *memstart = *cm_stat & 0x00ff0000; 871 872 /* 873 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 874 * to access the entire bank. 875 */ 876 switch ((*cm_sdram >> 2) & 0x7) 877 { 878 case 0: 879 *memsize = 16 * 1024 * 1024; 880 break; 881 case 1: 882 *memsize = 32 * 1024 * 1024; 883 break; 884 case 2: 885 *memsize = 64 * 1024 * 1024; 886 break; 887 case 3: 888 *memsize = 128 * 1024 * 1024; 889 break; 890 case 4: 891 /* With 256M of memory there is no wrap-around. */ 892 *memsize = 256 * 1024 * 1024 - *memstart; 893 break; 894 default: 895 printf("CM_SDRAM retuns unknown value, using 16M\n"); 896 *memsize = 16 * 1024 * 1024; 897 break; 898 } 899 } 900
Indexes created Tue Sep 30 11:09:46 GMT 2025