integrator_machdep.c revision 1.58
1 /* $NetBSD: integrator_machdep.c,v 1.58 2008/04/27 18:58:46 matt 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 1.58 2008/04/27 18:58:46 matt 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 int physmem = 0; 142 143 /*int debug_flags;*/ 144 #ifndef PMAP_STATIC_L1S 145 int max_processes = 64; /* Default number */ 146 #endif /* !PMAP_STATIC_L1S */ 147 148 /* Physical and virtual addresses for some global pages */ 149 pv_addr_t irqstack; 150 pv_addr_t undstack; 151 pv_addr_t abtstack; 152 pv_addr_t kernelstack; 153 154 vm_offset_t msgbufphys; 155 156 extern u_int data_abort_handler_address; 157 extern u_int prefetch_abort_handler_address; 158 extern u_int undefined_handler_address; 159 160 #ifdef PMAP_DEBUG 161 extern int pmap_debug_level; 162 #endif 163 164 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 165 166 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 167 #define KERNEL_PT_KERNEL_NUM 2 168 /* L2 tables for mapping kernel VM */ 169 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 170 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 171 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 172 173 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 174 175 struct user *proc0paddr; 176 177 /* Prototypes */ 178 179 static void integrator_sdram_bounds (paddr_t *, psize_t *); 180 181 void consinit(void); 182 183 /* A load of console goo. */ 184 #include "vga.h" 185 #if NVGA > 0 186 #include <dev/ic/mc6845reg.h> 187 #include <dev/ic/pcdisplayvar.h> 188 #include <dev/ic/vgareg.h> 189 #include <dev/ic/vgavar.h> 190 #endif 191 192 #include "pckbc.h" 193 #if NPCKBC > 0 194 #include <dev/ic/i8042reg.h> 195 #include <dev/ic/pckbcvar.h> 196 #endif 197 198 #include "com.h" 199 #if NCOM > 0 200 #include <dev/ic/comreg.h> 201 #include <dev/ic/comvar.h> 202 #ifndef CONCOMADDR 203 #define CONCOMADDR 0x3f8 204 #endif 205 #endif 206 207 /* 208 * Define the default console speed for the board. This is generally 209 * what the firmware provided with the board defaults to. 210 */ 211 #ifndef CONSPEED 212 #define CONSPEED B115200 213 #endif 214 #ifndef CONMODE 215 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 216 #endif 217 218 int comcnspeed = CONSPEED; 219 int comcnmode = CONMODE; 220 221 #include "plcom.h" 222 #if (NPLCOM > 0) 223 #include <evbarm/dev/plcomreg.h> 224 #include <evbarm/dev/plcomvar.h> 225 226 #include <evbarm/ifpga/ifpgamem.h> 227 #include <evbarm/ifpga/ifpgareg.h> 228 #include <evbarm/ifpga/ifpgavar.h> 229 #endif 230 231 #ifndef CONSDEVNAME 232 #define CONSDEVNAME "plcom" 233 #endif 234 235 #ifndef PLCONSPEED 236 #define PLCONSPEED B38400 237 #endif 238 #ifndef PLCONMODE 239 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 240 #endif 241 #ifndef PLCOMCNUNIT 242 #define PLCOMCNUNIT -1 243 #endif 244 245 int plcomcnspeed = PLCONSPEED; 246 int plcomcnmode = PLCONMODE; 247 248 #if 0 249 extern struct consdev kcomcons; 250 static void kcomcnputc(dev_t, int); 251 #endif 252 253 /* 254 * void cpu_reboot(int howto, char *bootstr) 255 * 256 * Reboots the system 257 * 258 * Deal with any syncing, unmounting, dumping and shutdown hooks, 259 * then reset the CPU. 260 */ 261 void 262 cpu_reboot(int howto, char *bootstr) 263 { 264 265 /* 266 * If we are still cold then hit the air brakes 267 * and crash to earth fast 268 */ 269 if (cold) { 270 doshutdownhooks(); 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 /* Make sure IRQ's are disabled */ 302 IRQdisable; 303 304 if (howto & RB_HALT) { 305 printf("The operating system has halted.\n"); 306 printf("Please press any key to reboot.\n\n"); 307 cngetc(); 308 } 309 310 printf("rebooting...\n"); 311 ifpga_reset(); 312 /*NOTREACHED*/ 313 } 314 315 /* Statically mapped devices. */ 316 static const struct pmap_devmap integrator_devmap[] = { 317 #if NPLCOM > 0 && defined(PLCONSOLE) 318 { 319 UART0_BOOT_BASE, 320 IFPGA_IO_BASE + IFPGA_UART0, 321 1024 * 1024, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE 324 }, 325 326 { 327 UART1_BOOT_BASE, 328 IFPGA_IO_BASE + IFPGA_UART1, 329 1024 * 1024, 330 VM_PROT_READ|VM_PROT_WRITE, 331 PTE_NOCACHE 332 }, 333 #endif 334 #if NPCI > 0 335 { 336 IFPGA_PCI_IO_VBASE, 337 IFPGA_PCI_IO_BASE, 338 IFPGA_PCI_IO_VSIZE, 339 VM_PROT_READ|VM_PROT_WRITE, 340 PTE_NOCACHE 341 }, 342 343 { 344 IFPGA_PCI_CONF_VBASE, 345 IFPGA_PCI_CONF_BASE, 346 IFPGA_PCI_CONF_VSIZE, 347 VM_PROT_READ|VM_PROT_WRITE, 348 PTE_NOCACHE 349 }, 350 #endif 351 352 { 353 0, 354 0, 355 0, 356 0, 357 0 358 } 359 }; 360 361 /* 362 * u_int initarm(...) 363 * 364 * Initial entry point on startup. This gets called before main() is 365 * entered. 366 * It should be responsible for setting up everything that must be 367 * in place when main is called. 368 * This includes 369 * Taking a copy of the boot configuration structure. 370 * Initialising the physical console so characters can be printed. 371 * Setting up page tables for the kernel 372 * Relocating the kernel to the bottom of physical memory 373 */ 374 375 u_int 376 initarm(void *arg) 377 { 378 int loop; 379 int loop1; 380 u_int l1pagetable; 381 extern char etext __asm ("_etext"); 382 extern char end __asm ("_end"); 383 paddr_t memstart; 384 psize_t memsize; 385 vm_offset_t physical_freestart; 386 vm_offset_t physical_freeend; 387 #if NPLCOM > 0 && defined(PLCONSOLE) 388 static struct bus_space plcom_bus_space; 389 #endif 390 391 /* 392 * Heads up ... Setup the CPU / MMU / TLB functions 393 */ 394 if (set_cpufuncs()) 395 panic("CPU not recognized!"); 396 397 #if NPLCOM > 0 && defined(PLCONSOLE) 398 /* 399 * Initialise the diagnostic serial console 400 * This allows a means of generating output during initarm(). 401 * Once all the memory map changes are complete we can call consinit() 402 * and not have to worry about things moving. 403 */ 404 405 if (PLCOMCNUNIT == 0) { 406 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd600000); 407 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 408 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 409 } else if (PLCOMCNUNIT == 1) { 410 ifpga_create_io_bs_tag(&plcom_bus_space, (void*)0xfd700000); 411 plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 412 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT); 413 } 414 #endif 415 416 #ifdef VERBOSE_INIT_ARM 417 /* Talk to the user */ 418 printf("\nNetBSD/evbarm (Integrator) booting ...\n"); 419 #endif 420 421 /* 422 * Fetch the SDRAM start/size from the CM configuration registers. 423 */ 424 integrator_sdram_bounds(&memstart, &memsize); 425 426 #ifdef VERBOSE_INIT_ARM 427 printf("initarm: Configuring system ...\n"); 428 #endif 429 430 /* Fake bootconfig structure for the benefit of pmap.c */ 431 /* XXX must make the memory description h/w independent */ 432 bootconfig.dramblocks = 1; 433 bootconfig.dram[0].address = memstart; 434 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 435 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA | BOOT_DRAM_PREFER; 436 437 /* 438 * Set up the variables that define the availablilty of 439 * physical memory. For now, we're going to set 440 * physical_freestart to 0x00200000 (where the kernel 441 * was loaded), and allocate the memory we need downwards. 442 * If we get too close to the L1 table that we set up, we 443 * will panic. We will update physical_freestart and 444 * physical_freeend later to reflect what pmap_bootstrap() 445 * wants to see. 446 * 447 * We assume that the kernel is loaded into bank[0]. 448 * 449 * XXX pmap_bootstrap() needs an enema. 450 */ 451 physical_start = bootconfig.dram[0].address; 452 physical_end = 0; 453 454 /* Update the address of the first free 16KB chunk of physical memory */ 455 physical_freestart = ((uintptr_t) &end - KERNEL_BASE + PGOFSET) 456 & ~PGOFSET; 457 if (physical_freestart < bootconfig.dram[0].address) 458 physical_freestart = bootconfig.dram[0].address; 459 physical_freeend = bootconfig.dram[0].address + 460 bootconfig.dram[0].pages * PAGE_SIZE; 461 462 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; loop++) { 463 paddr_t memoryblock_end; 464 465 memoryblock_end = bootconfig.dram[loop].address + 466 bootconfig.dram[loop].pages * PAGE_SIZE; 467 if (memoryblock_end > physical_end) 468 physical_end = memoryblock_end; 469 if (bootconfig.dram[loop].address < physical_start) 470 physical_start = bootconfig.dram[loop].address; 471 472 physmem += bootconfig.dram[loop].pages; 473 } 474 475 #ifdef VERBOSE_INIT_ARM 476 /* Tell the user about the memory */ 477 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 478 physical_start, physical_end - 1); 479 #endif 480 481 /* 482 * Okay, the kernel starts 2MB in from the bottom of physical 483 * memory. We are going to allocate our bootstrap pages downwards 484 * from there. 485 * 486 * We need to allocate some fixed page tables to get the kernel 487 * going. We allocate one page directory and a number of page 488 * tables and store the physical addresses in the kernel_pt_table 489 * array. 490 * 491 * The kernel page directory must be on a 16K boundary. The page 492 * tables must be on 4K boundaries. What we do is allocate the 493 * page directory on the first 16K boundary that we encounter, and 494 * the page tables on 4K boundaries otherwise. Since we allocate 495 * at least 3 L2 page tables, we are guaranteed to encounter at 496 * least one 16K aligned region. 497 */ 498 499 #ifdef VERBOSE_INIT_ARM 500 printf("Allocating page tables\n"); 501 #endif 502 503 #ifdef VERBOSE_INIT_ARM 504 printf("freestart = 0x%08lx, free pages = %d (0x%08x)\n", 505 physical_freestart, physmem, physmem); 506 #endif 507 508 /* Define a macro to simplify memory allocation */ 509 #define valloc_pages(var, np) \ 510 alloc_pages((var).pv_pa, (np)); \ 511 (var).pv_va = KERNEL_BASE + (var).pv_pa; 512 513 #define alloc_pages(var, np) \ 514 (var) = physical_freestart; \ 515 physical_freestart += ((np) * PAGE_SIZE); \ 516 if (physical_freeend < physical_freestart) \ 517 panic("initarm: out of memory"); \ 518 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 519 520 loop1 = 0; 521 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 522 /* Are we 16KB aligned for an L1 ? */ 523 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 524 && kernel_l1pt.pv_pa == 0) { 525 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 526 } else { 527 valloc_pages(kernel_pt_table[loop1], 528 L2_TABLE_SIZE / PAGE_SIZE); 529 ++loop1; 530 } 531 } 532 533 /* This should never be able to happen but better confirm that. */ 534 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 535 panic("initarm: Failed to align the kernel page directory"); 536 537 /* 538 * Allocate a page for the system page mapped to V0x00000000 539 * This page will just contain the system vectors and can be 540 * shared by all processes. 541 */ 542 alloc_pages(systempage.pv_pa, 1); 543 544 /* Allocate stacks for all modes */ 545 valloc_pages(irqstack, IRQ_STACK_SIZE); 546 valloc_pages(abtstack, ABT_STACK_SIZE); 547 valloc_pages(undstack, UND_STACK_SIZE); 548 valloc_pages(kernelstack, UPAGES); 549 550 #ifdef VERBOSE_INIT_ARM 551 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 552 irqstack.pv_va); 553 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 554 abtstack.pv_va); 555 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 556 undstack.pv_va); 557 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 558 kernelstack.pv_va); 559 #endif 560 561 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 562 563 /* 564 * Ok we have allocated physical pages for the primary kernel 565 * page tables 566 */ 567 568 #ifdef VERBOSE_INIT_ARM 569 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 570 #endif 571 572 /* 573 * Now we start construction of the L1 page table 574 * We start by mapping the L2 page tables into the L1. 575 * This means that we can replace L1 mappings later on if necessary 576 */ 577 l1pagetable = kernel_l1pt.pv_pa; 578 579 /* Map the L2 pages tables in the L1 page table */ 580 pmap_link_l2pt(l1pagetable, 0x00000000, 581 &kernel_pt_table[KERNEL_PT_SYS]); 582 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 583 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 584 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 585 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 586 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 587 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 588 589 /* update the top of the kernel VM */ 590 pmap_curmaxkvaddr = 591 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 592 593 #ifdef VERBOSE_INIT_ARM 594 printf("Mapping kernel\n"); 595 #endif 596 597 /* Now we fill in the L2 pagetable for the kernel static code/data */ 598 { 599 size_t textsize = (uintptr_t) &etext - KERNEL_TEXT_BASE; 600 size_t totalsize = (uintptr_t) &end - KERNEL_TEXT_BASE; 601 u_int logical; 602 603 textsize = (textsize + PGOFSET) & ~PGOFSET; 604 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 605 606 logical = 0x00200000; /* offset of kernel in RAM */ 607 608 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 609 logical, textsize, VM_PROT_READ | VM_PROT_WRITE, 610 PTE_CACHE); 611 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 612 logical, totalsize - textsize, 613 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 614 } 615 616 #ifdef VERBOSE_INIT_ARM 617 printf("Constructing L2 page tables\n"); 618 #endif 619 620 /* Map the stack pages */ 621 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 622 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 623 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 624 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 625 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 626 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 627 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 628 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 629 630 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 631 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 632 633 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 634 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 635 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 636 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 637 } 638 639 /* Map the vector page. */ 640 #if 1 641 /* MULTI-ICE requires that page 0 is NC/NB so that it can download 642 the cache-clean code there. */ 643 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 644 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 645 #else 646 pmap_map_entry(l1pagetable, ARM_VECTORS_LOW, systempage.pv_pa, 647 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 648 #endif 649 650 /* Map the statically mapped devices. */ 651 pmap_devmap_bootstrap(l1pagetable, integrator_devmap); 652 653 /* 654 * Now we have the real page tables in place so we can switch to them. 655 * Once this is done we will be running with the REAL kernel page 656 * tables. 657 */ 658 659 /* Switch tables */ 660 #ifdef VERBOSE_INIT_ARM 661 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 662 #endif 663 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 664 setttb(kernel_l1pt.pv_pa); 665 cpu_tlb_flushID(); 666 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 667 668 /* 669 * Moved from cpu_startup() as data_abort_handler() references 670 * this during uvm init 671 */ 672 proc0paddr = (struct user *)kernelstack.pv_va; 673 lwp0.l_addr = proc0paddr; 674 675 #ifdef PLCONSOLE 676 /* 677 * The IFPGA registers have just moved. 678 * Detach the diagnostic serial port and reattach at the new address. 679 */ 680 plcomcndetach(); 681 #endif 682 683 /* 684 * XXX this should only be done in main() but it useful to 685 * have output earlier ... 686 */ 687 consinit(); 688 689 #ifdef VERBOSE_INIT_ARM 690 printf("bootstrap done.\n"); 691 #endif 692 693 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 694 695 /* 696 * Pages were allocated during the secondary bootstrap for the 697 * stacks for different CPU modes. 698 * We must now set the r13 registers in the different CPU modes to 699 * point to these stacks. 700 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 701 * of the stack memory. 702 */ 703 #ifdef VERBOSE_INIT_ARM 704 printf("init subsystems: stacks "); 705 #endif 706 707 set_stackptr(PSR_IRQ32_MODE, 708 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 709 set_stackptr(PSR_ABT32_MODE, 710 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 711 set_stackptr(PSR_UND32_MODE, 712 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 713 714 /* 715 * Well we should set a data abort handler. 716 * Once things get going this will change as we will need a proper 717 * handler. 718 * Until then we will use a handler that just panics but tells us 719 * why. 720 * Initialisation of the vectors will just panic on a data abort. 721 * This just fills in a slightly better one. 722 */ 723 #ifdef VERBOSE_INIT_ARM 724 printf("vectors "); 725 #endif 726 data_abort_handler_address = (u_int)data_abort_handler; 727 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 728 undefined_handler_address = (u_int)undefinedinstruction_bounce; 729 730 /* Initialise the undefined instruction handlers */ 731 #ifdef VERBOSE_INIT_ARM 732 printf("undefined "); 733 #endif 734 undefined_init(); 735 736 /* Load memory into UVM. */ 737 #ifdef VERBOSE_INIT_ARM 738 printf("page "); 739 #endif 740 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 741 742 /* Round the start up and the end down to a page. */ 743 physical_freestart = (physical_freestart + PGOFSET) & ~PGOFSET; 744 physical_freeend &= ~PGOFSET; 745 746 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 747 paddr_t block_start = (paddr_t) bootconfig.dram[loop].address; 748 paddr_t block_end = block_start + 749 (bootconfig.dram[loop].pages * PAGE_SIZE); 750 751 if (loop == 0) { 752 block_start = physical_freestart; 753 block_end = physical_freeend; 754 } 755 756 757 uvm_page_physload(atop(block_start), atop(block_end), 758 atop(block_start), atop(block_end), 759 (bootconfig.dram[loop].flags & BOOT_DRAM_PREFER) ? 760 VM_FREELIST_DEFAULT : VM_FREELIST_DEFAULT + 1); 761 } 762 763 /* Boot strap pmap telling it where the kernel page table is */ 764 #ifdef VERBOSE_INIT_ARM 765 printf("pmap "); 766 #endif 767 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 768 769 /* Setup the IRQ system */ 770 #ifdef VERBOSE_INIT_ARM 771 printf("irq "); 772 #endif 773 ifpga_intr_init(); 774 775 #ifdef VERBOSE_INIT_ARM 776 printf("done.\n"); 777 #endif 778 779 #if NKSYMS || defined(DDB) || defined(LKM) 780 /* Firmware doesn't load symbols. */ 781 ksyms_init(0, NULL, NULL); 782 #endif 783 784 #ifdef DDB 785 db_machine_init(); 786 if (boothowto & RB_KDB) 787 Debugger(); 788 #endif 789 790 /* We return the new stack pointer address */ 791 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 792 } 793 794 void 795 consinit(void) 796 { 797 static int consinit_called = 0; 798 #if NPLCOM > 0 && defined(PLCONSOLE) 799 static struct bus_space plcom_bus_space; 800 #endif 801 #if 0 802 char *console = CONSDEVNAME; 803 #endif 804 805 if (consinit_called != 0) 806 return; 807 808 consinit_called = 1; 809 810 #if NPLCOM > 0 && defined(PLCONSOLE) 811 if (PLCOMCNUNIT == 0) { 812 ifpga_create_io_bs_tag(&plcom_bus_space, 813 (void*)UART0_BOOT_BASE); 814 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 815 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 816 panic("can't init serial console"); 817 return; 818 } else if (PLCOMCNUNIT == 1) { 819 ifpga_create_io_bs_tag(&plcom_bus_space, 820 (void*)UART0_BOOT_BASE); 821 if (plcomcnattach(&plcom_bus_space, 0, plcomcnspeed, 822 IFPGA_UART_CLK, plcomcnmode, PLCOMCNUNIT)) 823 panic("can't init serial console"); 824 return; 825 } 826 #endif 827 #if (NCOM > 0) 828 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 829 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 830 panic("can't init serial console @%x", CONCOMADDR); 831 return; 832 #endif 833 panic("No serial console configured"); 834 } 835 836 static void 837 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize) 838 { 839 volatile unsigned long *cm_sdram 840 = (volatile unsigned long *)0x10000020; 841 volatile unsigned long *cm_stat 842 = (volatile unsigned long *)0x10000010; 843 844 *memstart = *cm_stat & 0x00ff0000; 845 846 /* 847 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around 848 * to access the entire bank. 849 */ 850 switch ((*cm_sdram >> 2) & 0x7) 851 { 852 case 0: 853 *memsize = 16 * 1024 * 1024; 854 break; 855 case 1: 856 *memsize = 32 * 1024 * 1024; 857 break; 858 case 2: 859 *memsize = 64 * 1024 * 1024; 860 break; 861 case 3: 862 *memsize = 128 * 1024 * 1024; 863 break; 864 case 4: 865 /* With 256M of memory there is no wrap-around. */ 866 *memsize = 256 * 1024 * 1024 - *memstart; 867 break; 868 default: 869 printf("CM_SDRAM retuns unknown value, using 16M\n"); 870 *memsize = 16 * 1024 * 1024; 871 break; 872 } 873 } 874
Indexes created Thu Oct 16 14:10:15 GMT 2025