integrator_machdep.c revision 1.57.10.3
1 /* $NetBSD: integrator_machdep.c,v 1.57.10.3 2009/08/19 18:46:07 yamt 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 1.57.10.3 2009/08/19 18:46:07 yamt 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 <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" 108 109 void 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 dependant as it varies depending 124 * on where the ROM appears when you turn the MMU off. 125 */ 126 127 u_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 1 133 134 BootConfig bootconfig; /* Boot config storage */ 135 char *boot_args = NULL; 136 char *boot_file = NULL; 137 138 vm_offset_t physical_start; 139 vm_offset_t physical_end; 140 vm_offset_t pagetables_start; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 /* Physical and virtual addresses for some global pages */ 148 pv_addr_t irqstack; 149 pv_addr_t undstack; 150 pv_addr_t abtstack; 151 pv_addr_t kernelstack; 152 153 vm_offset_t msgbufphys; 154 155 extern u_int data_abort_handler_address; 156 extern u_int prefetch_abort_handler_address; 157 extern u_int undefined_handler_address; 158 159 #ifdef PMAP_DEBUG 160 extern int pmap_debug_level; 161 #endif 162 163 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 164 165 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 166 #define KERNEL_PT_KERNEL_NUM 2 167 /* L2 tables for mapping kernel VM */ 168 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 169 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 170 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 171 172 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 173 174 struct user *proc0paddr; 175 176 /* Prototypes */ 177 178 static void integrator_sdram_bounds (paddr_t *, psize_t *); 179 180 void consinit(void); 181 182 /* A load of console goo. */ 183 #include "vga.h" 184 #if NVGA > 0 185 #include <dev/ic/mc6845reg.h> 186 #include <dev/ic/pcdisplayvar.h> 187 #include <dev/ic/vgareg.h> 188 #include <dev/ic/vgavar.h> 189 #endif 190 191 #include "pckbc.h" 192 #if NPCKBC > 0 193 #include <dev/ic/i8042reg.h> 194 #include <dev/ic/pckbcvar.h> 195 #endif 196 197 #include "com.h" 198 #if NCOM > 0 199 #include <dev/ic/comreg.h> 200 #include <dev/ic/comvar.h> 201 #ifndef CONCOMADDR 202 #define CONCOMADDR 0x3f8 203 #endif 204 #endif 205 206 /* 207 * Define the default console speed for the board. This is generally 208 * what the firmware provided with the board defaults to. 209 */ 210 #ifndef CONSPEED 211 #define CONSPEED B115200 212 #endif 213 #ifndef CONMODE 214 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 215 #endif 216 217 int comcnspeed = CONSPEED; 218 int comcnmode = CONMODE; 219 220 #include "plcom.h" 221 #if (NPLCOM > 0) 222 #include <evbarm/dev/plcomreg.h> 223 #include <evbarm/dev/plcomvar.h> 224 225 #include <evbarm/ifpga/ifpgamem.h> 226 #include <evbarm/ifpga/ifpgareg.h> 227 #include <evbarm/ifpga/ifpgavar.h> 228 #endif 229 230 #ifndef CONSDEVNAME 231 #define CONSDEVNAME "plcom" 232 #endif 233 234 #ifndef PLCONSPEED 235 #define PLCONSPEED B38400 236 #endif 237 #ifndef PLCONMODE 238 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 239 #endif 240 #ifndef PLCOMCNUNIT 241 #define PLCOMCNUNIT -1 242 #endif 243 244 int plcomcnspeed = PLCONSPEED; 245 int plcomcnmode = PLCONMODE; 246 247 #if 0 248 extern struct consdev kcomcons; 249 static void kcomcnputc(dev_t, int); 250 #endif 251 252 /* 253 * void cpu_reboot(int howto, char *bootstr) 254 * 255 * Reboots the system 256 * 257 * Deal with any syncing, unmounting, dumping and shutdown hooks, 258 * then reset the CPU. 259 */ 260 void 261 cpu_reboot(int howto, char *bootstr) 262 { 263 264 /* 265 * If we are still cold then hit the air brakes 266 * and crash to earth fast 267 */ 268 if (cold) { 269 doshutdownhooks(); 270 pmf_system_shutdown(boothowto); 271 printf("The operating system has halted.\n"); 272 printf("Please press any key to reboot.\n\n"); 273 cngetc(); 274 printf("rebooting...\n"); 275 ifpga_reset(); 276 /*NOTREACHED*/ 277 } 278 279 /* Disable console buffering */ 280 281 /* 282 * If RB_NOSYNC was not specified sync the discs. 283 * Note: Unless cold is set to 1 here, syslogd will die during the 284 * unmount. It looks like syslogd is getting woken up only to find 285 * that it cannot page part of the binary in as the filesystem has 286 * been unmounted. 287 */ 288 if (!(howto & RB_NOSYNC)) 289 bootsync(); 290 291 /* Say NO to interrupts */ 292 splhigh(); 293 294 /* Do a dump if requested. */ 295 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 296 dumpsys(); 297 298 /* Run any shutdown hooks */ 299 doshutdownhooks(); 300 301 pmf_system_shutdown(boothowto); 302 303 /* Make sure IRQ's are disabled */ 304 IRQdisable; 305 306 if (howto & RB_HALT) { 307 printf("The operating system has halted.\n"); 308 printf("Please press any key to reboot.\n\n"); 309 cngetc(); 310 } 311 312 printf("rebooting...\n"); 313 ifpga_reset(); 314 /*NOTREACHED*/ 315 } 316 317 /* Statically mapped devices. */ 318 static const struct pmap_devmap integrator_devmap[] = { 319 #if NPLCOM > 0 && defined(PLCONSOLE) 320 { 321 UART0_BOOT_BASE, 322 IFPGA_IO_BASE + IFPGA_UART0, 323 1024 * 1024, 324 VM_PROT_READ|VM_PROT_WRITE, 325 PTE_NOCACHE 326 }, 327 328 { 329 UART1_BOOT_BASE, 330 IFPGA_IO_BASE + IFPGA_UART1, 331 1024 * 1024, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE 334 }, 335 #endif 336 #if NPCI > 0 337 { 338 IFPGA_PCI_IO_VBASE, 339 IFPGA_PCI_IO_BASE, 340 IFPGA_PCI_IO_VSIZE, 341 VM_PROT_READ|VM_PROT_WRITE, 342 PTE_NOCACHE 343 }, 344 345 { 346 IFPGA_PCI_CONF_VBASE, 347 IFPGA_PCI_CONF_BASE, 348 IFPGA_PCI_CONF_VSIZE, 349 VM_PROT_READ|VM_PROT_WRITE, 350 PTE_NOCACHE 351 }, 352 #endif 353 354 { 355 0, 356 0, 357 0, 358 0, 359 0 360 } 361 }; 362 363 /* 364 * u_int initarm(...) 365 * 366 * Initial entry point on startup. This gets called before main() is 367 * entered. 368 * It should be responsible for setting up everything that must be 369 * in place when main is called. 370 * This includes 371 * Taking a copy of the boot configuration structure. 372 * Initialising the physical console so characters can be printed. 373 * Setting up page tables for the kernel 374 * Relocating the kernel to the bottom of physical memory 375 */ 376 377 u_int 378 initarm(void *arg) 379 { 380 int loop; 381 int loop1; 382 u_int l1pagetable; 383 extern char etext __asm ("_etext"); 384 extern char end __asm ("_end"); 385 paddr_t memstart; 386 psize_t memsize; 387 vm_offset_t physical_freestart; 388 vm_offset_t physical_freeend; 389 #if NPLCOM > 0 && defined(PLCONSOLE) 390 static struct bus_space plcom_bus_space; 391 #endif 392 393 /* 394 * Heads up ... Setup the CPU / MMU / TLB functions 395 */ 396 if (set_cpufuncs()) 397 panic("CPU not recognized!"); 398 399 #if NPLCOM > 0 && defined(PLCONSOLE) 400 /* 401 * Initialise the diagnostic serial console 402 * This allows a means of generating output during initarm(). 403 * Once all the memory map changes are complete we can call consinit() 404 * and not have to worry about things moving. 405 */ 406 407 if (PLCOMCNUNIT == 0) { 408 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 409 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 410 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 411 } else if (PLCOMCNUNIT == 1) { 412 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 413 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 414 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 415 } 416 #endif 417 418 #ifdef VERBOSE_INIT_ARM 419 /* Talk to the user */ 420 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 421 #endif 422 423 /* 424 * Fetch the SDRAM start/size from the CM configuration registers. 425 */ 426 integrator_sdram_bounds(&memstart, &memsize); 427 428 #ifdef VERBOSE_INIT_ARM 429 printf("initarm: Configuring system ...\n"); 430 #endif 431 432 /* Fake bootconfig structure for the benefit of pmap.c */ 433 /* XXX must make the memory description h/w independent */ 434 bootconfig.dramblocks = 1; 435 bootconfig.dram[0].address = memstart; 436 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 437 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 438 439 /* 440 * Set up the variables that define the availablilty of 441 * physical memory. For now, we're going to set 442 * physical_freestart to 0x00200000 (where the kernel 443 * was loaded), and allocate the memory we need downwards. 444 * If we get too close to the L1 table that we set up, we 445 * will panic. We will update physical_freestart and 446 * physical_freeend later to reflect what pmap_bootstrap() 447 * wants to see. 448 * 449 * We assume that the kernel is loaded into bank[0]. 450 * 451 * XXX pmap_bootstrap() needs an enema. 452 */ 453 physical_start = bootconfig.dram[0].address; 454 physical_end = 0; 455 456 /* Update the address of the first free 16KB chunk of physical memory */ 457 physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET) 458 & ~PGOFSET; 459 if (physical_freestart < bootconfig.dram[0].address) 460 physical_freestart = bootconfig.dram[0].address; 461 physical_freeend = bootconfig.dram[0].address + 462 bootconfig.dram[0].pages * PAGE_SIZE; 463 464 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) { 465 paddr_t memoryblock_end; 466 467 memoryblock_end = bootconfig.dram[loop].address + 468 bootconfig.dram[loop].pages * PAGE_SIZE; 469 if (memoryblock_end > physical_end) 470 physical_end = memoryblock_end; 471 if (bootconfig.dram[loop].address < physical_start) 472 physical_start = bootconfig.dram[loop].address; 473 474 physmem += bootconfig.dram[loop].pages; 475 } 476 477 #ifdef VERBOSE_INIT_ARM 478 /* Tell the user about the memory */ 479 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 480 physical_start, physical_end - 1); 481 #endif 482 483 /* 484 * Okay, the kernel starts 2MB in from the bottom of physical 485 * memory. We are going to allocate our bootstrap pages downwards 486 * from there. 487 * 488 * We need to allocate some fixed page tables to get the kernel 489 * going. We allocate one page directory and a number of page 490 * tables and store the physical addresses in the kernel_pt_table 491 * array. 492 * 493 * The kernel page directory must be on a 16K boundary. The page 494 * tables must be on 4K boundaries. What we do is allocate the 495 * page directory on the first 16K boundary that we encounter, and 496 * the page tables on 4K boundaries otherwise. Since we allocate 497 * at least 3 L2 page tables, we are guaranteed to encounter at 498 * least one 16K aligned region. 499 */ 500 501 #ifdef VERBOSE_INIT_ARM 502 printf("Allocating page tables\n"); 503 #endif 504 505 #ifdef VERBOSE_INIT_ARM 506 printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n", 507 physical_freestart, physmem, physmem); 508 #endif 509 510 /* Define a macro to simplify memory allocation */ 511 #define valloc_pages(var, np) \ 512 alloc_pages((var).pv_pa, (np)); \ 513 (var).pv_va = KERNEL_BASE + (var).pv_pa; 514 515 #define alloc_pages(var, np) \ 516 (var) = physical_freestart; \ 517 physical_freestart += ((np) * PAGE_SIZE); \ 518 if (physical_freeend < physical_freestart) \ 519 panic("initarm: out of memory"); \ 520 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 521 522 loop1 = 0; 523 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 524 /* Are we 16KB aligned for an L1 ? */ 525 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 526 && kernel_l1pt.pv_pa == 0) { 527 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 528 } else { 529 valloc_pages(kernel_pt_table[loop1], 530 L2_TABLE_SIZE / PAGE_SIZE); 531 ++loop1; 532 } 533 } 534 535 /* This should never be able to happen but better confirm that. */ 536 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 537 panic("initarm: Failed to align the kernel page directory"); 538 539 /* 540 * Allocate a page for the system page mapped to V0x00000000 541 * This page will just contain the system vectors and can be 542 * shared by all processes. 543 */ 544 alloc_pages(systempage.pv_pa, 1); 545 546 /* Allocate stacks for all modes */ 547 valloc_pages(irqstack, IRQ_STACK_SIZE); 548 valloc_pages(abtstack, ABT_STACK_SIZE); 549 valloc_pages(undstack, UND_STACK_SIZE); 550 valloc_pages(kernelstack, UPAGES); 551 552 #ifdef VERBOSE_INIT_ARM 553 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 554 irqstack.pv_va); 555 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 556 abtstack.pv_va); 557 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 558 undstack.pv_va); 559 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 560 kernelstack.pv_va); 561 #endif 562 563 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 564 565 /* 566 * Ok we have allocated physical pages for the primary kernel 567 * page tables 568 */ 569 570 #ifdef VERBOSE_INIT_ARM 571 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 572 #endif 573 574 /* 575 * Now we start construction of the L1 page table 576 * We start by mapping the L2 page tables into the L1. 577 * This means that we can replace L1 mappings later on if necessary 578 */ 579 l1pagetable = kernel_l1pt.pv_pa; 580 581 /* Map the L2 pages tables in the L1 page table */ 582 pmap_link_l2pt(l1pagetable, 0x00000000, 583 &kernel_pt_table[KERNEL_PT_SYS]); 584 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 585 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 586 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 587 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 588 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 589 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 590 591 /* update the top of the kernel VM */ 592 pmap_curmaxkvaddr = 593 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 594 595 #ifdef VERBOSE_INIT_ARM 596 printf("Mapping kernel\n"); 597 #endif 598 599 /* Now we fill in the L2 pagetable for the kernel static code/data */ 600 { 601 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 602 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 603 u_int logical; 604 605 textsize = (textsize + PGOFSET) & ~PGOFSET; 606 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 607 608 logical = 0x00200000; /* offset of kernel in RAM */ 609 610 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 611 logical, textsize, VM_PROT_READ | VM_PROT_WRITE, 612 PTE_CACHE); 613 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 614 logical, totalsize - textsize, 615 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 616 } 617 618 #ifdef VERBOSE_INIT_ARM 619 printf("Constructing L2 page tables\n"); 620 #endif 621 622 /* Map the stack pages */ 623 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 624 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 626 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 627 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 628 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 630 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 631 632 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 633 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 634 635 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 636 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 637 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 638 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 639 } 640 641 /* Map the vector page. */ 642 #if 1 643 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 644 the cache-clean code there. */ 645 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 646 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 647 #else 648 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 649 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 650 #endif 651 652 /* Map the statically mapped devices. */ 653 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 654 655 /* 656 * Now we have the real page tables in place so we can switch to them. 657 * Once this is done we will be running with the REAL kernel page 658 * tables. 659 */ 660 661 /* Switch tables */ 662 #ifdef VERBOSE_INIT_ARM 663 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 664 #endif 665 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 666 setttb(kernel_l1pt.pv_pa); 667 cpu_tlb_flushID(); 668 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 669 670 /* 671 * Moved from cpu_startup() as data_abort_handler() references 672 * this during uvm init 673 */ 674 proc0paddr = (struct user *)kernelstack.pv_va; 675 lwp0.l_addr = proc0paddr; 676 677 #ifdef PLCONSOLE 678 /* 679 * The IFPGA registers have just moved. 680 * Detach the diagnostic serial port and reattach at the new address. 681 */ 682 plcomcndetach(); 683 #endif 684 685 /* 686 * XXX this should only be done in main() but it useful to 687 * have output earlier ... 688 */ 689 consinit(); 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("bootstrap done.\n"); 693 #endif 694 695 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 696 697 /* 698 * Pages were allocated during the secondary bootstrap for the 699 * stacks for different CPU modes. 700 * We must now set the r13 registers in the different CPU modes to 701 * point to these stacks. 702 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 703 * of the stack memory. 704 */ 705 #ifdef VERBOSE_INIT_ARM 706 printf("init subsystems: stacks "); 707 #endif 708 709 set_stackptr(PSR_IRQ32_MODE, 710 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 711 set_stackptr(PSR_ABT32_MODE, 712 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 713 set_stackptr(PSR_UND32_MODE, 714 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 715 716 /* 717 * Well we should set a data abort handler. 718 * Once things get going this will change as we will need a proper 719 * handler. 720 * Until then we will use a handler that just panics but tells us 721 * why. 722 * Initialisation of the vectors will just panic on a data abort. 723 * This just fills in a slightly better one. 724 */ 725 #ifdef VERBOSE_INIT_ARM 726 printf("vectors "); 727 #endif 728 data_abort_handler_address = (u_int)data_abort_handler; 729 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 730 undefined_handler_address = (u_int)undefinedinstruction_bounce; 731 732 /* Initialise the undefined instruction handlers */ 733 #ifdef VERBOSE_INIT_ARM 734 printf("undefined "); 735 #endif 736 undefined_init(); 737 738 /* Load memory into UVM. */ 739 #ifdef VERBOSE_INIT_ARM 740 printf("page "); 741 #endif 742 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 743 744 /* Round the start up and the end down to a page. */ 745 physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET; 746 physical_freeend &= ~PGOFSET; 747 748 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 749 paddr_t block_start = (paddr_t) bootconfig.dram[loop].address; 750 paddr_t block_end = block_start + 751 (bootconfig.dram[loop].pages * PAGE_SIZE); 752 753 if (loop == 0) { 754 block_start = physical_freestart; 755 block_end = physical_freeend; 756 } 757 758 759 uvm_page_physload(atop(block_start), atop(block_end), 760 atop(block_start), atop(block_end), 761 (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ? 762 VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1); 763 } 764 765 /* Boot strap pmap telling it where the kernel page table is */ 766 #ifdef VERBOSE_INIT_ARM 767 printf("pmap "); 768 #endif 769 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 770 771 /* Setup the IRQ system */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("irq "); 774 #endif 775 ifpga_intr_init(); 776 777 #ifdef VERBOSE_INIT_ARM 778 printf("done.\n"); 779 #endif 780 781 #ifdef DDB 782 db_machine_init(); 783 if (boothowto & RB_KDB) 784 Debugger(); 785 #endif 786 787 /* We return the new stack pointer address */ 788 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 789 } 790 791 void 792 consinit(void) 793 { 794 static int consinit_called = 0; 795 #if NPLCOM > 0 && defined(PLCONSOLE) 796 static struct bus_space plcom_bus_space; 797 #endif 798 #if 0 799 char *console = CONSDEVNAME; 800 #endif 801 802 if (consinit_called != 0) 803 return; 804 805 consinit_called = 1; 806 807 #if NPLCOM > 0 && defined(PLCONSOLE) 808 if (PLCOMCNUNIT == 0) { 809 ifpga_create_io_bs_tag(&plcom_bus_space, 810 (void*)UART0_BOOT_BASE); 811 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 812 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 813 panic("can't init serial console"); 814 return; 815 } else if (PLCOMCNUNIT == 1) { 816 ifpga_create_io_bs_tag(&plcom_bus_space, 817 (void*)UART0_BOOT_BASE); 818 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 819 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 820 panic("can't init serial console"); 821 return; 822 } 823 #endif 824 #if (NCOM > 0) 825 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 826 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 827 panic("can't init serial console @%x", CONCOMADDR); 828 return; 829 #endif 830 panic("No serial console configured"); 831 } 832 833 static void 834 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 835 { 836 volatile unsigned long *cm_sdram 837 = (volatile unsigned long *)0x10000020; 838 volatile unsigned long *cm_stat 839 = (volatile unsigned long *)0x10000010; 840 841 *memstart = *cm_stat & 0x00ff0000; 842 843 /* 844 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 845 * to access the entire bank. 846 */ 847 switch ((*cm_sdram >> 2) & 0x7) 848 { 849 case 0: 850 *memsize = 16 * 1024 * 1024; 851 break; 852 case 1: 853 *memsize = 32 * 1024 * 1024; 854 break; 855 case 2: 856 *memsize = 64 * 1024 * 1024; 857 break; 858 case 3: 859 *memsize = 128 * 1024 * 1024; 860 break; 861 case 4: 862 /* With 256M of memory there is no wrap-around. */ 863 *memsize = 256 * 1024 * 1024 - *memstart; 864 break; 865 default: 866 printf("CM_SDRAM retuns unknown value, using 16M\n"); 867 *memsize = 16 * 1024 * 1024; 868 break; 869 } 870 } 871
Indexes created Thu Oct 16 14:10:15 GMT 2025