1/* $NetBSD: integrator_machdep.c,v 1.68 2011/07/01 20:39:34 dyoung 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 dependent 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 1.68 2011/07/01 20:39:34 dyoung 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 <sys/bus.h> 97#include <machine/cpu.h> 98#include <machine/frame.h> 99#include <machine/intr.h> 100#include <arm/undefined.h> 101 102#include <arm/arm32/machdep.h> 103 104#include <evbarm/integrator/integrator_boot.h> 105 106#include "pci.h" 107#include "ksyms.h" 108 109void ifpga_reset(void) __attribute__((noreturn)); 110 111/* Kernel text starts 2MB in from the bottom of the kernel address space. */ 112#define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 113#define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 114 115/* 116 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 117 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 118 */ 119#define KERNEL_VM_SIZE 0x0C000000 120 121/* 122 * Address to call from cpu_reset() to reset the machine. 123 * This is machine architecture dependent as it varies depending 124 * on where the ROM appears when you turn the MMU off. 125 */ 126 127u_int cpu_reset_address = (u_int) ifpga_reset; 128 129/* Define various stack sizes in pages */ 130#define IRQ_STACK_SIZE 1 131#define ABT_STACK_SIZE 1 132#define UND_STACK_SIZE 1 133 134BootConfig bootconfig; /* Boot config storage */ 135char *boot_args = NULL; 136char *boot_file = NULL; 137 138vm_offset_t physical_start; 139vm_offset_t physical_end; 140 141/*int debug_flags;*/ 142#ifndef PMAP_STATIC_L1S 143int max_processes = 64; /* Default number */ 144#endif /* !PMAP_STATIC_L1S */ 145 146/* Physical and virtual addresses for some global pages */ 147pv_addr_t irqstack; 148pv_addr_t undstack; 149pv_addr_t abtstack; 150pv_addr_t kernelstack; 151 152vm_offset_t msgbufphys; 153 154extern u_int data_abort_handler_address; 155extern u_int prefetch_abort_handler_address; 156extern u_int undefined_handler_address; 157 158#ifdef PMAP_DEBUG 159extern int pmap_debug_level; 160#endif 161 162#define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 163 164#define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 165#define KERNEL_PT_KERNEL_NUM 2 166 /* L2 tables for mapping kernel VM */ 167#define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 168#define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 169#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 170 171pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 172 173/* Prototypes */ 174 175static void integrator_sdram_bounds (paddr_t *, psize_t *); 176 177void consinit(void); 178 179/* A load of console goo. */ 180#include "vga.h" 181#if NVGA > 0 182#include <dev/ic/mc6845reg.h> 183#include <dev/ic/pcdisplayvar.h> 184#include <dev/ic/vgareg.h> 185#include <dev/ic/vgavar.h> 186#endif 187 188#include "pckbc.h" 189#if NPCKBC > 0 190#include <dev/ic/i8042reg.h> 191#include <dev/ic/pckbcvar.h> 192#endif 193 194#include "com.h" 195#if NCOM > 0 196#include <dev/ic/comreg.h> 197#include <dev/ic/comvar.h> 198#ifndef CONCOMADDR 199#define CONCOMADDR 0x3f8 200#endif 201#endif 202 203/* 204 * Define the default console speed for the board. This is generally 205 * what the firmware provided with the board defaults to. 206 */ 207#ifndef CONSPEED 208#define CONSPEED B115200 209#endif 210#ifndef CONMODE 211#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 212#endif 213 214int comcnspeed = CONSPEED; 215int comcnmode = CONMODE; 216 217#include "plcom.h" 218#if (NPLCOM > 0) 219#include <evbarm/dev/plcomreg.h> 220#include <evbarm/dev/plcomvar.h> 221 222#include <evbarm/ifpga/ifpgamem.h> 223#include <evbarm/ifpga/ifpgareg.h> 224#include <evbarm/ifpga/ifpgavar.h> 225#endif 226 227#ifndef CONSDEVNAME 228#define CONSDEVNAME "plcom" 229#endif 230 231#ifndef PLCONSPEED 232#define PLCONSPEED B38400 233#endif 234#ifndef PLCONMODE 235#define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 236#endif 237#ifndef PLCOMCNUNIT 238#define PLCOMCNUNIT -1 239#endif 240 241int plcomcnspeed = PLCONSPEED; 242int plcomcnmode = PLCONMODE; 243 244#if 0 245extern struct consdev kcomcons; 246static void kcomcnputc(dev_t, int); 247#endif 248 249/* 250 * void cpu_reboot(int howto, char *bootstr) 251 * 252 * Reboots the system 253 * 254 * Deal with any syncing, unmounting, dumping and shutdown hooks, 255 * then reset the CPU. 256 */ 257void 258cpu_reboot(int howto, char *bootstr) 259{ 260 261 /* 262 * If we are still cold then hit the air brakes 263 * and crash to earth fast 264 */ 265 if (cold) { 266 doshutdownhooks(); 267 pmf_system_shutdown(boothowto); 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 */ 277 278 /* 279 * If RB_NOSYNC was not specified sync the discs. 280 * Note: Unless cold is set to 1 here, syslogd will die during the 281 * unmount. It looks like syslogd is getting woken up only to find 282 * that it cannot page part of the binary in as the filesystem has 283 * 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 pmf_system_shutdown(boothowto); 299 300 /* Make sure IRQ's are disabled */ 301 IRQdisable; 302 303 if (howto & RB_HALT) { 304 printf("The operating system has halted.\n"); 305 printf("Please press any key to reboot.\n\n"); 306 cngetc(); 307 } 308 309 printf("rebooting...\n"); 310 ifpga_reset(); 311 /*NOTREACHED*/ 312} 313 314/* Statically mapped devices. */ 315static const struct pmap_devmap integrator_devmap[] = { 316#if NPLCOM > 0 && defined(PLCONSOLE) 317 { 318 UART0_BOOT_BASE, 319 IFPGA_IO_BASE + IFPGA_UART0, 320 1024 * 1024, 321 VM_PROT_READ|VM_PROT_WRITE, 322 PTE_NOCACHE 323 }, 324 325 { 326 UART1_BOOT_BASE, 327 IFPGA_IO_BASE + IFPGA_UART1, 328 1024 * 1024, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE 331 }, 332#endif 333#if NPCI > 0 334 { 335 IFPGA_PCI_IO_VBASE, 336 IFPGA_PCI_IO_BASE, 337 IFPGA_PCI_IO_VSIZE, 338 VM_PROT_READ|VM_PROT_WRITE, 339 PTE_NOCACHE 340 }, 341 342 { 343 IFPGA_PCI_CONF_VBASE, 344 IFPGA_PCI_CONF_BASE, 345 IFPGA_PCI_CONF_VSIZE, 346 VM_PROT_READ|VM_PROT_WRITE, 347 PTE_NOCACHE 348 }, 349#endif 350 351 { 352 0, 353 0, 354 0, 355 0, 356 0 357 } 358}; 359 360/* 361 * u_int initarm(...) 362 * 363 * Initial entry point on startup. This gets called before main() is 364 * entered. 365 * It should be responsible for setting up everything that must be 366 * in place when main is called. 367 * This includes 368 * Taking a copy of the boot configuration structure. 369 * Initialising the physical console so characters can be printed. 370 * Setting up page tables for the kernel 371 * Relocating the kernel to the bottom of physical memory 372 */ 373 374u_int 375initarm(void *arg) 376{ 377 int loop; 378 int loop1; 379 u_int l1pagetable; 380 extern char etext __asm ("_etext"); 381 extern char end __asm ("_end"); 382 paddr_t memstart; 383 psize_t memsize; 384 vm_offset_t physical_freestart; 385 vm_offset_t physical_freeend; 386 387 /* 388 * Heads up ... Setup the CPU / MMU / TLB functions 389 */ 390 if (set_cpufuncs()) 391 panic("CPU not recognized!"); 392 393#if NPLCOM > 0 && defined(PLCONSOLE) 394 /* 395 * Initialise the diagnostic serial console 396 * This allows a means of generating output during initarm(). 397 * Once all the memory map changes are complete we can call consinit() 398 * and not have to worry about things moving. 399 */ 400 401 if (PLCOMCNUNIT == 0) { 402 static struct bus_space plcom_bus_space; 403 static struct plcom_instance ifpga_pi0 = { 404 .pi_type = PLCOM_TYPE_PL010, 405 .pi_iot = &plcom_bus_space, 406 .pi_size = IFPGA_UART_SIZE, 407 .pi_iobase = 0x0 408 }; 409 410 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 411 plcomcnattach(&ifpga_pi0, plcomcnspeed, IFPGA_UART_CLK, 412 plcomcnmode, PLCOMCNUNIT); 413 } else if (PLCOMCNUNIT == 1) { 414 static struct bus_space plcom_bus_space; 415 static struct plcom_instance ifpga_pi1 = { 416 .pi_type = PLCOM_TYPE_PL010, 417 .pi_iot = &plcom_bus_space, 418 .pi_size = IFPGA_UART_SIZE, 419 .pi_iobase = 0x0 420 }; 421 422 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 423 plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK, 424 plcomcnmode, PLCOMCNUNIT); 425 } 426#endif 427 428#ifdef VERBOSE_INIT_ARM 429 /* Talk to the user */ 430 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 431#endif 432 433 /* 434 * Fetch the SDRAM start/size from the CM configuration registers. 435 */ 436 integrator_sdram_bounds(&memstart, &memsize); 437 438#ifdef VERBOSE_INIT_ARM 439 printf("initarm: Configuring system ...\n"); 440#endif 441 442 /* Fake bootconfig structure for the benefit of pmap.c */ 443 /* XXX must make the memory description h/w independent */ 444 bootconfig.dramblocks = 1; 445 bootconfig.dram[0].address = memstart; 446 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 447 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 448 449 /* 450 * Set up the variables that define the availablilty of 451 * physical memory. For now, we're going to set 452 * physical_freestart to 0x00200000 (where the kernel 453 * was loaded), and allocate the memory we need downwards. 454 * If we get too close to the L1 table that we set up, we 455 * will panic. We will update physical_freestart and 456 * physical_freeend later to reflect what pmap_bootstrap() 457 * wants to see. 458 * 459 * We assume that the kernel is loaded into bank[0]. 460 * 461 * XXX pmap_bootstrap() needs an enema. 462 */ 463 physical_start = bootconfig.dram[0].address; 464 physical_end = 0; 465 466 /* Update the address of the first free 16KB chunk of physical memory */ 467 physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET) 468 & ~PGOFSET; 469 if (physical_freestart < bootconfig.dram[0].address) 470 physical_freestart = bootconfig.dram[0].address; 471 physical_freeend = bootconfig.dram[0].address + 472 bootconfig.dram[0].pages * PAGE_SIZE; 473 474 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) { 475 paddr_t memoryblock_end; 476 477 memoryblock_end = bootconfig.dram[loop].address + 478 bootconfig.dram[loop].pages * PAGE_SIZE; 479 if (memoryblock_end > physical_end) 480 physical_end = memoryblock_end; 481 if (bootconfig.dram[loop].address < physical_start) 482 physical_start = bootconfig.dram[loop].address; 483 484 physmem += bootconfig.dram[loop].pages; 485 } 486 487#ifdef VERBOSE_INIT_ARM 488 /* Tell the user about the memory */ 489 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 490 physical_start, physical_end - 1); 491#endif 492 493 /* 494 * Okay, the kernel starts 2MB in from the bottom of physical 495 * memory. We are going to allocate our bootstrap pages downwards 496 * from there. 497 * 498 * We need to allocate some fixed page tables to get the kernel 499 * going. We allocate one page directory and a number of page 500 * tables and store the physical addresses in the kernel_pt_table 501 * array. 502 * 503 * The kernel page directory must be on a 16K boundary. The page 504 * tables must be on 4K boundaries. What we do is allocate the 505 * page directory on the first 16K boundary that we encounter, and 506 * the page tables on 4K boundaries otherwise. Since we allocate 507 * at least 3 L2 page tables, we are guaranteed to encounter at 508 * least one 16K aligned region. 509 */ 510 511#ifdef VERBOSE_INIT_ARM 512 printf("Allocating page tables\n"); 513#endif 514 515#ifdef VERBOSE_INIT_ARM 516 printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n", 517 physical_freestart, physmem, physmem); 518#endif 519 520 /* Define a macro to simplify memory allocation */ 521#define valloc_pages(var, np) \ 522 alloc_pages((var).pv_pa, (np)); \ 523 (var).pv_va = KERNEL_BASE + (var).pv_pa; 524 525#define alloc_pages(var, np) \ 526 (var) = physical_freestart; \ 527 physical_freestart += ((np) * PAGE_SIZE); \ 528 if (physical_freeend < physical_freestart) \ 529 panic("initarm: out of memory"); \ 530 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 531 532 loop1 = 0; 533 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 534 /* Are we 16KB aligned for an L1 ? */ 535 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 536 && kernel_l1pt.pv_pa == 0) { 537 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 538 } else { 539 valloc_pages(kernel_pt_table[loop1], 540 L2_TABLE_SIZE / PAGE_SIZE); 541 ++loop1; 542 } 543 } 544 545 /* This should never be able to happen but better confirm that. */ 546 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 547 panic("initarm: Failed to align the kernel page directory"); 548 549 /* 550 * Allocate a page for the system page mapped to V0x00000000 551 * This page will just contain the system vectors and can be 552 * shared by all processes. 553 */ 554 alloc_pages(systempage.pv_pa, 1); 555 556 /* Allocate stacks for all modes */ 557 valloc_pages(irqstack, IRQ_STACK_SIZE); 558 valloc_pages(abtstack, ABT_STACK_SIZE); 559 valloc_pages(undstack, UND_STACK_SIZE); 560 valloc_pages(kernelstack, UPAGES); 561 562#ifdef VERBOSE_INIT_ARM 563 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 564 irqstack.pv_va); 565 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 566 abtstack.pv_va); 567 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 568 undstack.pv_va); 569 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 570 kernelstack.pv_va); 571#endif 572 573 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 574 575 /* 576 * Ok we have allocated physical pages for the primary kernel 577 * page tables 578 */ 579 580#ifdef VERBOSE_INIT_ARM 581 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 582#endif 583 584 /* 585 * Now we start construction of the L1 page table 586 * We start by mapping the L2 page tables into the L1. 587 * This means that we can replace L1 mappings later on if necessary 588 */ 589 l1pagetable = kernel_l1pt.pv_pa; 590 591 /* Map the L2 pages tables in the L1 page table */ 592 pmap_link_l2pt(l1pagetable, 0x00000000, 593 &kernel_pt_table[KERNEL_PT_SYS]); 594 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 595 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 596 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 597 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 598 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 599 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 600 601 /* update the top of the kernel VM */ 602 pmap_curmaxkvaddr = 603 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 604 605#ifdef VERBOSE_INIT_ARM 606 printf("Mapping kernel\n"); 607#endif 608 609 /* Now we fill in the L2 pagetable for the kernel static code/data */ 610 { 611 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 612 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 613 u_int logical; 614 615 textsize = (textsize + PGOFSET) & ~PGOFSET; 616 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 617 618 logical = 0x00200000; /* offset of kernel in RAM */ 619 620 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 621 logical, textsize, VM_PROT_READ | VM_PROT_WRITE, 622 PTE_CACHE); 623 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 624 logical, totalsize - textsize, 625 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 626 } 627 628#ifdef VERBOSE_INIT_ARM 629 printf("Constructing L2 page tables\n"); 630#endif 631 632 /* Map the stack pages */ 633 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 634 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 635 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 636 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 637 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 638 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 640 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 641 642 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 643 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 644 645 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 646 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 647 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 648 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 649 } 650 651 /* Map the vector page. */ 652#if 1 653 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 654 the cache-clean code there. */ 655 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 656 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 657#else 658 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 659 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 660#endif 661 662 /* Map the statically mapped devices. */ 663 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 664 665 /* 666 * Now we have the real page tables in place so we can switch to them. 667 * Once this is done we will be running with the REAL kernel page 668 * tables. 669 */ 670 671 /* Switch tables */ 672#ifdef VERBOSE_INIT_ARM 673 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 674#endif 675 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 676 cpu_setttb(kernel_l1pt.pv_pa); 677 cpu_tlb_flushID(); 678 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 679 680 /* 681 * Moved from cpu_startup() as data_abort_handler() references 682 * this during uvm init 683 */ 684 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 685 686#ifdef PLCONSOLE 687 /* 688 * The IFPGA registers have just moved. 689 * Detach the diagnostic serial port and reattach at the new address. 690 */ 691 plcomcndetach(); 692#endif 693 694 /* 695 * XXX this should only be done in main() but it useful to 696 * have output earlier ... 697 */ 698 consinit(); 699 700#ifdef VERBOSE_INIT_ARM 701 printf("bootstrap done.\n"); 702#endif 703 704 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 705 706 /* 707 * Pages were allocated during the secondary bootstrap for the 708 * stacks for different CPU modes. 709 * We must now set the r13 registers in the different CPU modes to 710 * point to these stacks. 711 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 712 * of the stack memory. 713 */ 714#ifdef VERBOSE_INIT_ARM 715 printf("init subsystems: stacks "); 716#endif 717 718 set_stackptr(PSR_IRQ32_MODE, 719 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 720 set_stackptr(PSR_ABT32_MODE, 721 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 722 set_stackptr(PSR_UND32_MODE, 723 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 724 725 /* 726 * Well we should set a data abort handler. 727 * Once things get going this will change as we will need a proper 728 * handler. 729 * Until then we will use a handler that just panics but tells us 730 * why. 731 * Initialisation of the vectors will just panic on a data abort. 732 * This just fills in a slightly better one. 733 */ 734#ifdef VERBOSE_INIT_ARM 735 printf("vectors "); 736#endif 737 data_abort_handler_address = (u_int)data_abort_handler; 738 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 739 undefined_handler_address = (u_int)undefinedinstruction_bounce; 740 741 /* Initialise the undefined instruction handlers */ 742#ifdef VERBOSE_INIT_ARM 743 printf("undefined "); 744#endif 745 undefined_init(); 746 747 /* Load memory into UVM. */ 748#ifdef VERBOSE_INIT_ARM 749 printf("page "); 750#endif 751 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 752 753 /* Round the start up and the end down to a page. */ 754 physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET; 755 physical_freeend &= ~PGOFSET; 756 757 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 758 paddr_t block_start = (paddr_t) bootconfig.dram[loop].address; 759 paddr_t block_end = block_start + 760 (bootconfig.dram[loop].pages * PAGE_SIZE); 761 762 if (loop == 0) { 763 block_start = physical_freestart; 764 block_end = physical_freeend; 765 } 766 767 768 uvm_page_physload(atop(block_start), atop(block_end), 769 atop(block_start), atop(block_end), 770 (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ? 771 VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1); 772 } 773 774 /* Boot strap pmap telling it where the kernel page table is */ 775#ifdef VERBOSE_INIT_ARM 776 printf("pmap "); 777#endif 778 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 779 780 /* Setup the IRQ system */ 781#ifdef VERBOSE_INIT_ARM 782 printf("irq "); 783#endif 784 ifpga_intr_init(); 785 786#ifdef VERBOSE_INIT_ARM 787 printf("done.\n"); 788#endif 789 790#ifdef DDB 791 db_machine_init(); 792 if (boothowto & RB_KDB) 793 Debugger(); 794#endif 795 796 /* We return the new stack pointer address */ 797 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 798} 799 800void 801consinit(void) 802{ 803 static int consinit_called = 0; 804#if 0 805 char *console = CONSDEVNAME; 806#endif 807 808 if (consinit_called != 0) 809 return; 810 811 consinit_called = 1; 812 813#if NPLCOM > 0 && defined(PLCONSOLE) 814 if (PLCOMCNUNIT == 0) { 815 static struct bus_space plcom_bus_space; 816 static struct plcom_instance ifpga_pi1 = { 817 .pi_type = PLCOM_TYPE_PL010, 818 .pi_iot = &plcom_bus_space, 819 .pi_size = IFPGA_UART_SIZE, 820 .pi_iobase = 0x0 821 }; 822 823 ifpga_create_io_bs_tag(&plcom_bus_space, 824 (void*)UART0_BOOT_BASE); 825 826 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK, 827 plcomcnmode, PLCOMCNUNIT)) 828 panic("can't init serial console"); 829 return; 830 } else if (PLCOMCNUNIT == 1) { 831 static struct bus_space plcom_bus_space; 832 static struct plcom_instance ifpga_pi1 = { 833 .pi_type = PLCOM_TYPE_PL010, 834 .pi_iot = &plcom_bus_space, 835 .pi_size = IFPGA_UART_SIZE, 836 .pi_iobase = 0x0 837 }; 838 839 ifpga_create_io_bs_tag(&plcom_bus_space, 840 (void*)UART0_BOOT_BASE); 841 842 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK, 843 plcomcnmode, PLCOMCNUNIT)) 844 panic("can't init serial console"); 845 return; 846 } 847#endif 848#if (NCOM > 0) 849 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 850 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 851 panic("can't init serial console @%x", CONCOMADDR); 852 return; 853#endif 854 panic("No serial console configured"); 855} 856 857static void 858integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 859{ 860 volatile unsigned long *cm_sdram 861 = (volatile unsigned long *)0x10000020; 862 volatile unsigned long *cm_stat 863 = (volatile unsigned long *)0x10000010; 864 865 *memstart = *cm_stat & 0x00ff0000; 866 867 /* 868 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 869 * to access the entire bank. 870 */ 871 switch ((*cm_sdram >> 2) & 0x7) 872 { 873 case 0: 874 *memsize = 16 * 1024 * 1024; 875 break; 876 case 1: 877 *memsize = 32 * 1024 * 1024; 878 break; 879 case 2: 880 *memsize = 64 * 1024 * 1024; 881 break; 882 case 3: 883 *memsize = 128 * 1024 * 1024; 884 break; 885 case 4: 886 /* With 256M of memory there is no wrap-around. */ 887 *memsize = 256 * 1024 * 1024 - *memstart; 888 break; 889 default: 890 printf("CM_SDRAM retuns unknown value, using 16M\n"); 891 *memsize = 16 * 1024 * 1024; 892 break; 893 } 894} 895