integrator_machdep.c revision 1.48
1 /* $NetBSD: integrator_machdep.c,v 1.48 2003/09/06 11:33:23 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 1.48 2003/09/06 11:33:23 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_end; 146 vm_offset_t pagetables_start; 147 int physmem = 0; 148 149 /*int debug_flags;*/ 150 #ifndef PMAP_STATIC_L1S 151 int max_processes = 64; /* Default number */ 152 #endif /* !PMAP_STATIC_L1S */ 153 154 /* Physical and virtual addresses for some global pages */ 155 pv_addr_t systempage; 156 pv_addr_t irqstack; 157 pv_addr_t undstack; 158 pv_addr_t abtstack; 159 pv_addr_t kernelstack; 160 161 vm_offset_t msgbufphys; 162 163 extern u_int data_abort_handler_address; 164 extern u_int prefetch_abort_handler_address; 165 extern u_int undefined_handler_address; 166 167 #ifdef PMAP_DEBUG 168 extern int pmap_debug_level; 169 #endif 170 171 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 172 173 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 174 #define KERNEL_PT_KERNEL_NUM 2 175 /* L2 tables for mapping kernel VM */ 176 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 177 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 178 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 179 180 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 181 182 struct user *proc0paddr; 183 184 /* Prototypes */ 185 186 static void integrator_sdram_bounds (paddr_t *, psize_t *); 187 188 void consinit(void); 189 190 /* A load of console goo. */ 191 #include "vga.h" 192 #if NVGA > 0 193 #include <dev/ic/mc6845reg.h> 194 #include <dev/ic/pcdisplayvar.h> 195 #include <dev/ic/vgareg.h> 196 #include <dev/ic/vgavar.h> 197 #endif 198 199 #include "pckbc.h" 200 #if NPCKBC > 0 201 #include <dev/ic/i8042reg.h> 202 #include <dev/ic/pckbcvar.h> 203 #endif 204 205 #include "com.h" 206 #if NCOM > 0 207 #include <dev/ic/comreg.h> 208 #include <dev/ic/comvar.h> 209 #ifndef CONCOMADDR 210 #define CONCOMADDR 0x3f8 211 #endif 212 #endif 213 214 /* 215 * Define the default console speed for the board. This is generally 216 * what the firmware provided with the board defaults to. 217 */ 218 #ifndef CONSPEED 219 #define CONSPEED B115200 220 #endif 221 #ifndef CONMODE 222 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 223 #endif 224 225 int comcnspeed = CONSPEED; 226 int comcnmode = CONMODE; 227 228 #include "plcom.h" 229 #if (NPLCOM > 0) 230 #include <evbarm/dev/plcomreg.h> 231 #include <evbarm/dev/plcomvar.h> 232 233 #include <evbarm/ifpga/ifpgamem.h> 234 #include <evbarm/ifpga/ifpgareg.h> 235 #include <evbarm/ifpga/ifpgavar.h> 236 #endif 237 238 #ifndef CONSDEVNAME 239 #define CONSDEVNAME "plcom" 240 #endif 241 242 #ifndef PLCONSPEED 243 #define PLCONSPEED B38400 244 #endif 245 #ifndef PLCONMODE 246 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 247 #endif 248 #ifndef PLCOMCNUNIT 249 #define PLCOMCNUNIT -1 250 #endif 251 252 int plcomcnspeed = PLCONSPEED; 253 int plcomcnmode = PLCONMODE; 254 255 #if 0 256 extern struct consdev kcomcons; 257 static void kcomcnputc(dev_t, int); 258 #endif 259 260 /* 261 * void cpu_reboot(int howto, char *bootstr) 262 * 263 * Reboots the system 264 * 265 * Deal with any syncing, unmounting, dumping and shutdown hooks, 266 * then reset the CPU. 267 */ 268 void 269 cpu_reboot(int howto, char *bootstr) 270 { 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 */ 287 288 /* 289 * If RB_NOSYNC was not specified sync the discs. 290 * Note: Unless cold is set to 1 here, syslogd will die during the 291 * unmount. It looks like syslogd is getting woken up only to find 292 * that it cannot page part of the binary in as the filesystem has 293 * 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 /* Statically mapped devices. */ 323 static const struct pmap_devmap integrator_devmap[] = { 324 #if NPLCOM > 0 && defined(PLCONSOLE) 325 { 326 UART0_BOOT_BASE, 327 IFPGA_IO_BASE + IFPGA_UART0, 328 1024 * 1024, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE 331 }, 332 333 { 334 UART1_BOOT_BASE, 335 IFPGA_IO_BASE + IFPGA_UART1, 336 1024 * 1024, 337 VM_PROT_READ|VM_PROT_WRITE, 338 PTE_NOCACHE 339 }, 340 #endif 341 #if NPCI > 0 342 { 343 IFPGA_PCI_IO_VBASE, 344 IFPGA_PCI_IO_BASE, 345 IFPGA_PCI_IO_VSIZE, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE 348 }, 349 350 { 351 IFPGA_PCI_CONF_VBASE, 352 IFPGA_PCI_CONF_BASE, 353 IFPGA_PCI_CONF_VSIZE, 354 VM_PROT_READ|VM_PROT_WRITE, 355 PTE_NOCACHE 356 }, 357 #endif 358 359 { 360 0, 361 0, 362 0, 363 0, 364 0 365 } 366 }; 367 368 /* 369 * u_int initarm(...) 370 * 371 * Initial entry point on startup. This gets called before main() is 372 * entered. 373 * It should be responsible for setting up everything that must be 374 * in place when main is called. 375 * This includes 376 * Taking a copy of the boot configuration structure. 377 * Initialising the physical console so characters can be printed. 378 * Setting up page tables for the kernel 379 * Relocating the kernel to the bottom of physical memory 380 */ 381 382 u_int 383 initarm(void *arg) 384 { 385 int loop; 386 int loop1; 387 u_int l1pagetable; 388 extern char etext asm ("_etext"); 389 extern char end asm ("_end"); 390 pv_addr_t kernel_l1pt; 391 paddr_t memstart; 392 psize_t memsize; 393 vm_offset_t physical_freestart; 394 vm_offset_t physical_freeend; 395 #if NPLCOM > 0 && defined(PLCONSOLE) 396 static struct bus_space plcom_bus_space; 397 #endif 398 399 /* 400 * Heads up ... Setup the CPU / MMU / TLB functions 401 */ 402 if (set_cpufuncs()) 403 panic("cpu not recognized!"); 404 405 #if NPLCOM > 0 && defined(PLCONSOLE) 406 /* 407 * Initialise the diagnostic serial console 408 * This allows a means of generating output during initarm(). 409 * Once all the memory map changes are complete we can call consinit() 410 * and not have to worry about things moving. 411 */ 412 413 if (PLCOMCNUNIT == 0) { 414 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 415 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 416 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 417 } else if (PLCOMCNUNIT == 1) { 418 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 419 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 420 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 421 } 422 #endif 423 424 #ifdef VERBOSE_INIT_ARM 425 /* Talk to the user */ 426 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 427 #endif 428 429 /* 430 * Fetch the SDRAM start/size from the CM configuration registers. 431 */ 432 integrator_sdram_bounds(&memstart, &memsize); 433 434 #ifdef VERBOSE_INIT_ARM 435 printf("initarm: Configuring system ...\n"); 436 #endif 437 438 /* Fake bootconfig structure for the benefit of pmap.c */ 439 /* XXX must make the memory description h/w independent */ 440 bootconfig.dramblocks = 1; 441 bootconfig.dram[0].address = memstart; 442 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 443 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 444 445 /* 446 * Set up the variables that define the availablilty of 447 * physical memory. For now, we're going to set 448 * physical_freestart to 0x00200000 (where the kernel 449 * was loaded), and allocate the memory we need downwards. 450 * If we get too close to the L1 table that we set up, we 451 * will panic. We will update physical_freestart and 452 * physical_freeend later to reflect what pmap_bootstrap() 453 * wants to see. 454 * 455 * We assume that the kernel is loaded into bank[0]. 456 * 457 * XXX pmap_bootstrap() needs an enema. 458 */ 459 physical_start = bootconfig.dram[0].address; 460 physical_end = 0; 461 462 /* Update the address of the first free 16KB chunk of physical memory */ 463 physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET) 464 & ~PGOFSET; 465 if (physical_freestart < bootconfig.dram[0].address) 466 physical_freestart = bootconfig.dram[0].address; 467 physical_freeend = bootconfig.dram[0].address + 468 bootconfig.dram[0].pages * PAGE_SIZE; 469 470 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) { 471 paddr_t memoryblock_end; 472 473 memoryblock_end = bootconfig.dram[loop].address + 474 bootconfig.dram[loop].pages * PAGE_SIZE; 475 if (memoryblock_end > physical_end) 476 physical_end = memoryblock_end; 477 if (bootconfig.dram[loop].address < physical_start) 478 physical_start = bootconfig.dram[loop].address; 479 480 physmem += bootconfig.dram[loop].pages; 481 } 482 483 #ifdef VERBOSE_INIT_ARM 484 /* Tell the user about the memory */ 485 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 486 physical_start, physical_end - 1); 487 #endif 488 489 /* 490 * Okay, the kernel starts 2MB in from the bottom of physical 491 * memory. We are going to allocate our bootstrap pages downwards 492 * from there. 493 * 494 * We need to allocate some fixed page tables to get the kernel 495 * going. We allocate one page directory and a number of page 496 * tables and store the physical addresses in the kernel_pt_table 497 * array. 498 * 499 * The kernel page directory must be on a 16K boundary. The page 500 * tables must be on 4K bounaries. What we do is allocate the 501 * page directory on the first 16K boundary that we encounter, and 502 * the page tables on 4K boundaries otherwise. Since we allocate 503 * at least 3 L2 page tables, we are guaranteed to encounter at 504 * least one 16K aligned region. 505 */ 506 507 #ifdef VERBOSE_INIT_ARM 508 printf("Allocating page tables\n"); 509 #endif 510 511 #ifdef VERBOSE_INIT_ARM 512 printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n", 513 physical_freestart, physmem, physmem); 514 #endif 515 516 /* Define a macro to simplify memory allocation */ 517 #define valloc_pages(var, np) \ 518 alloc_pages((var).pv_pa, (np)); \ 519 (var).pv_va = KERNEL_BASE + (var).pv_pa; 520 521 #define alloc_pages(var, np) \ 522 (var) = physical_freestart; \ 523 physical_freestart += ((np) * PAGE_SIZE); \ 524 if (physical_freeend < physical_freestart) \ 525 panic("initarm: out of memory"); \ 526 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 527 528 loop1 = 0; 529 kernel_l1pt.pv_pa = 0; 530 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 531 /* Are we 16KB aligned for an L1 ? */ 532 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 533 && kernel_l1pt.pv_pa == 0) { 534 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 535 } else { 536 valloc_pages(kernel_pt_table[loop1], 537 L2_TABLE_SIZE / PAGE_SIZE); 538 ++loop1; 539 } 540 } 541 542 /* This should never be able to happen but better confirm that. */ 543 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 544 panic("initarm: Failed to align the kernel page directory"); 545 546 /* 547 * Allocate a page for the system page mapped to V0x00000000 548 * This page will just contain the system vectors and can be 549 * shared by all processes. 550 */ 551 alloc_pages(systempage.pv_pa, 1); 552 553 /* Allocate stacks for all modes */ 554 valloc_pages(irqstack, IRQ_STACK_SIZE); 555 valloc_pages(abtstack, ABT_STACK_SIZE); 556 valloc_pages(undstack, UND_STACK_SIZE); 557 valloc_pages(kernelstack, UPAGES); 558 559 #ifdef VERBOSE_INIT_ARM 560 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 561 irqstack.pv_va); 562 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 563 abtstack.pv_va); 564 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 565 undstack.pv_va); 566 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 567 kernelstack.pv_va); 568 #endif 569 570 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 571 572 /* 573 * Ok we have allocated physical pages for the primary kernel 574 * page tables 575 */ 576 577 #ifdef VERBOSE_INIT_ARM 578 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 579 #endif 580 581 /* 582 * Now we start construction of the L1 page table 583 * We start by mapping the L2 page tables into the L1. 584 * This means that we can replace L1 mappings later on if necessary 585 */ 586 l1pagetable = kernel_l1pt.pv_pa; 587 588 /* Map the L2 pages tables in the L1 page table */ 589 pmap_link_l2pt(l1pagetable, 0x00000000, 590 &kernel_pt_table[KERNEL_PT_SYS]); 591 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 592 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 593 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 594 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 595 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 596 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 597 598 /* update the top of the kernel VM */ 599 pmap_curmaxkvaddr = 600 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 601 602 #ifdef VERBOSE_INIT_ARM 603 printf("Mapping kernel\n"); 604 #endif 605 606 /* Now we fill in the L2 pagetable for the kernel static code/data */ 607 { 608 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 609 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 610 u_int logical; 611 612 textsize = (textsize + PGOFSET) & ~PGOFSET; 613 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 614 615 logical = 0x00200000; /* offset of kernel in RAM */ 616 617 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 618 logical, textsize, VM_PROT_READ | VM_PROT_WRITE, 619 PTE_CACHE); 620 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 621 logical, totalsize - textsize, 622 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 623 } 624 625 #ifdef VERBOSE_INIT_ARM 626 printf("Constructing L2 page tables\n"); 627 #endif 628 629 /* Map the stack pages */ 630 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 631 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 632 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 633 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 634 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 635 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 636 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 637 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 638 639 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 640 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 641 642 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 643 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 644 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 645 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 646 } 647 648 /* Map the vector page. */ 649 #if 1 650 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 651 the cache-clean code there. */ 652 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 653 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 654 #else 655 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 656 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 657 #endif 658 659 /* Map the statically mapped devices. */ 660 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 661 662 /* 663 * Now we have the real page tables in place so we can switch to them. 664 * Once this is done we will be running with the REAL kernel page 665 * tables. 666 */ 667 668 /* Switch tables */ 669 #ifdef VERBOSE_INIT_ARM 670 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 671 #endif 672 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 673 setttb(kernel_l1pt.pv_pa); 674 cpu_tlb_flushID(); 675 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 676 677 /* 678 * Moved from cpu_startup() as data_abort_handler() references 679 * this during uvm init 680 */ 681 proc0paddr = (struct user *)kernelstack.pv_va; 682 lwp0.l_addr = proc0paddr; 683 684 #ifdef PLCONSOLE 685 /* 686 * The IFPGA registers have just moved. 687 * Detach the diagnostic serial port and reattach at the new address. 688 */ 689 plcomcndetach(); 690 #endif 691 692 /* 693 * XXX this should only be done in main() but it useful to 694 * have output earlier ... 695 */ 696 consinit(); 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("bootstrap done.\n"); 700 #endif 701 702 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 703 704 /* 705 * Pages were allocated during the secondary bootstrap for the 706 * stacks for different CPU modes. 707 * We must now set the r13 registers in the different CPU modes to 708 * point to these stacks. 709 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 710 * of the stack memory. 711 */ 712 #ifdef VERBOSE_INIT_ARM 713 printf("init subsystems: stacks "); 714 #endif 715 716 set_stackptr(PSR_IRQ32_MODE, 717 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 718 set_stackptr(PSR_ABT32_MODE, 719 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 720 set_stackptr(PSR_UND32_MODE, 721 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 722 723 /* 724 * Well we should set a data abort handler. 725 * Once things get going this will change as we will need a proper 726 * handler. 727 * Until then we will use a handler that just panics but tells us 728 * why. 729 * Initialisation of the vectors will just panic on a data abort. 730 * This just fills in a slighly better one. 731 */ 732 #ifdef VERBOSE_INIT_ARM 733 printf("vectors "); 734 #endif 735 data_abort_handler_address = (u_int)data_abort_handler; 736 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 737 undefined_handler_address = (u_int)undefinedinstruction_bounce; 738 739 /* Initialise the undefined instruction handlers */ 740 #ifdef VERBOSE_INIT_ARM 741 printf("undefined "); 742 #endif 743 undefined_init(); 744 745 /* Load memory into UVM. */ 746 #ifdef VERBOSE_INIT_ARM 747 printf("page "); 748 #endif 749 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 750 751 /* Round the start up and the end down to a page. */ 752 physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET; 753 physical_freeend &= ~PGOFSET; 754 755 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 756 paddr_t block_start = (paddr_t) bootconfig.dram[loop].address; 757 paddr_t block_end = block_start + 758 (bootconfig.dram[loop].pages * PAGE_SIZE); 759 760 if (loop == 0) { 761 block_start = physical_freestart; 762 block_end = physical_freeend; 763 } 764 765 766 uvm_page_physload(atop(block_start), atop(block_end), 767 atop(block_start), atop(block_end), 768 (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ? 769 VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1); 770 } 771 772 /* Boot strap pmap telling it where the kernel page table is */ 773 #ifdef VERBOSE_INIT_ARM 774 printf("pmap "); 775 #endif 776 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 777 KERNEL_VM_BASE + KERNEL_VM_SIZE); 778 779 /* Setup the IRQ system */ 780 #ifdef VERBOSE_INIT_ARM 781 printf("irq "); 782 #endif 783 ifpga_intr_init(); 784 785 #ifdef VERBOSE_INIT_ARM 786 printf("done.\n"); 787 #endif 788 789 #ifdef IPKDB 790 /* Initialise ipkdb */ 791 ipkdb_init(); 792 if (boothowto & RB_KDB) 793 ipkdb_connect(0); 794 #endif 795 796 #if NKSYMS || defined(DDB) || defined(LKM) 797 /* Firmware doesn't load symbols. */ 798 ksyms_init(0, NULL, NULL); 799 #endif 800 801 #ifdef DDB 802 db_machine_init(); 803 if (boothowto & RB_KDB) 804 Debugger(); 805 #endif 806 807 /* We return the new stack pointer address */ 808 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 809 } 810 811 void 812 consinit(void) 813 { 814 static int consinit_called = 0; 815 #if NPLCOM > 0 && defined(PLCONSOLE) 816 static struct bus_space plcom_bus_space; 817 #endif 818 #if 0 819 char *console = CONSDEVNAME; 820 #endif 821 822 if (consinit_called != 0) 823 return; 824 825 consinit_called = 1; 826 827 #if NPLCOM > 0 && defined(PLCONSOLE) 828 if (PLCOMCNUNIT == 0) { 829 ifpga_create_io_bs_tag(&plcom_bus_space, 830 (void*)UART0_BOOT_BASE); 831 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 832 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 833 panic("can't init serial console"); 834 return; 835 } else if (PLCOMCNUNIT == 1) { 836 ifpga_create_io_bs_tag(&plcom_bus_space, 837 (void*)UART0_BOOT_BASE); 838 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 839 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 840 panic("can't init serial console"); 841 return; 842 } 843 #endif 844 #if (NCOM > 0) 845 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 846 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 847 panic("can't init serial console @%x", CONCOMADDR); 848 return; 849 #endif 850 panic("No serial console configured"); 851 } 852 853 static void 854 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 855 { 856 volatile unsigned long *cm_sdram 857 = (volatile unsigned long *)0x10000020; 858 volatile unsigned long *cm_stat 859 = (volatile unsigned long *)0x10000010; 860 861 *memstart = *cm_stat & 0x00ff0000; 862 863 /* 864 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 865 * to access the entire bank. 866 */ 867 switch ((*cm_sdram >> 2) & 0x7) 868 { 869 case 0: 870 *memsize = 16 * 1024 * 1024; 871 break; 872 case 1: 873 *memsize = 32 * 1024 * 1024; 874 break; 875 case 2: 876 *memsize = 64 * 1024 * 1024; 877 break; 878 case 3: 879 *memsize = 128 * 1024 * 1024; 880 break; 881 case 4: 882 /* With 256M of memory there is no wrap-around. */ 883 *memsize = 256 * 1024 * 1024 - *memstart; 884 break; 885 default: 886 printf("CM_SDRAM retuns unknown value, using 16M\n"); 887 *memsize = 16 * 1024 * 1024; 888 break; 889 } 890 } 891
Indexes created Tue Sep 30 17:09:57 GMT 2025