smdk2800_machdep.c revision 1.24.38.1
1 /* $NetBSD: smdk2800_machdep.c,v 1.24.38.1 2007/11/09 05:38:04 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Fujitsu Component Limited 5 * Copyright (c) 2002, 2003, 2005 Genetec Corporation 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of The Fujitsu Component Limited nor the name of 17 * Genetec corporation may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC 21 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, 22 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC 25 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 28 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 29 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 2001,2002 ARM Ltd 37 * All rights reserved. 38 * 39 * Redistribution and use in source and binary forms, with or without 40 * modification, are permitted provided that the following conditions 41 * are met: 42 * 1. Redistributions of source code must retain the above copyright 43 * notice, this list of conditions and the following disclaimer. 44 * 2. Redistributions in binary form must reproduce the above copyright 45 * notice, this list of conditions and the following disclaimer in the 46 * documentation and/or other materials provided with the distribution. 47 * 3. The name of the company may not be used to endorse or promote 48 * products derived from this software without specific prior written 49 * permission. 50 * 51 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 52 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 53 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 54 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 55 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 56 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 57 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 58 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 59 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 60 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 61 * POSSIBILITY OF SUCH DAMAGE. 62 * 63 */ 64 65 /* 66 * Copyright (c) 1997,1998 Mark Brinicombe. 67 * Copyright (c) 1997,1998 Causality Limited. 68 * All rights reserved. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. All advertising materials mentioning features or use of this software 79 * must display the following acknowledgement: 80 * This product includes software developed by Mark Brinicombe 81 * for the NetBSD Project. 82 * 4. The name of the company nor the name of the author may be used to 83 * endorse or promote products derived from this software without specific 84 * prior written permission. 85 * 86 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 87 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 88 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 89 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 90 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 91 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 92 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 93 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 94 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 95 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 96 * SUCH DAMAGE. 97 * 98 * Machine dependant functions for kernel setup for integrator board 99 * 100 * Created : 24/11/97 101 */ 102 103 /* 104 * Machine dependant functions for kernel setup for Samsung SMDK2800 105 * derived from integrator_machdep.c 106 */ 107 108 #include <sys/cdefs.h> 109 __KERNEL_RCSID(0, "$NetBSD: smdk2800_machdep.c,v 1.24.38.1 2007/11/09 05:38:04 matt Exp $"); 110 111 #include "opt_ddb.h" 112 #include "opt_kgdb.h" 113 #include "opt_ipkdb.h" 114 #include "opt_pmap_debug.h" 115 #include "opt_md.h" 116 #include "pci.h" 117 118 #include <sys/param.h> 119 #include <sys/device.h> 120 #include <sys/systm.h> 121 #include <sys/kernel.h> 122 #include <sys/exec.h> 123 #include <sys/proc.h> 124 #include <sys/msgbuf.h> 125 #include <sys/reboot.h> 126 #include <sys/termios.h> 127 #include <sys/ksyms.h> 128 129 #include <uvm/uvm_extern.h> 130 131 #include <dev/cons.h> 132 #include <dev/md.h> 133 134 #include <machine/db_machdep.h> 135 #include <ddb/db_sym.h> 136 #include <ddb/db_extern.h> 137 #ifdef KGDB 138 #include <sys/kgdb.h> 139 #endif 140 141 #include <machine/bootconfig.h> 142 #include <machine/bus.h> 143 #include <machine/cpu.h> 144 #include <machine/frame.h> 145 #include <machine/intr.h> 146 #include <arm/undefined.h> 147 148 #include <arm/arm32/machdep.h> 149 150 #include <arm/s3c2xx0/s3c2800reg.h> 151 #include <arm/s3c2xx0/s3c2800var.h> 152 #include <evbarm/smdk2xx0/smdk2800var.h> 153 154 #include "ksyms.h" 155 156 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 157 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 158 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 159 160 /* 161 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 162 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 163 */ 164 #define KERNEL_VM_SIZE 0x0C000000 165 166 /* Memory disk support */ 167 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 168 #define DO_MEMORY_DISK 169 /* We have memory disk image outside of the kernel on ROM. */ 170 #ifdef MEMORY_DISK_ROOT_ROM 171 /* map the image directory and use read-only */ 172 #else 173 /* copy the image to RAM */ 174 #endif 175 #endif 176 177 178 /* 179 * Address to call from cpu_reset() to reset the machine. 180 * This is machine architecture dependant as it varies depending 181 * on where the ROM appears when you turn the MMU off. 182 */ 183 u_int cpu_reset_address = (u_int)0; 184 185 /* Define various stack sizes in pages */ 186 #define IRQ_STACK_SIZE 1 187 #define ABT_STACK_SIZE 1 188 #ifdef IPKDB 189 #define UND_STACK_SIZE 2 190 #else 191 #define UND_STACK_SIZE 1 192 #endif 193 194 BootConfig bootconfig; /* Boot config storage */ 195 char *boot_args = NULL; 196 char *boot_file = NULL; 197 198 vm_offset_t physical_start; 199 vm_offset_t physical_freestart; 200 vm_offset_t physical_freeend; 201 vm_offset_t physical_end; 202 u_int free_pages; 203 vm_offset_t pagetables_start; 204 int physmem = 0; 205 206 /*int debug_flags;*/ 207 #ifndef PMAP_STATIC_L1S 208 int max_processes = 64; /* Default number */ 209 #endif /* !PMAP_STATIC_L1S */ 210 211 /* Physical and virtual addresses for some global pages */ 212 pv_addr_t irqstack; 213 pv_addr_t undstack; 214 pv_addr_t abtstack; 215 pv_addr_t kernelstack; 216 217 vm_offset_t msgbufphys; 218 219 extern u_int data_abort_handler_address; 220 extern u_int prefetch_abort_handler_address; 221 extern u_int undefined_handler_address; 222 223 #ifdef PMAP_DEBUG 224 extern int pmap_debug_level; 225 #endif 226 227 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 228 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 229 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 230 231 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 232 233 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 234 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 235 236 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 237 238 struct user *proc0paddr; 239 240 /* Prototypes */ 241 242 void consinit(void); 243 void kgdb_port_init(void); 244 245 /* A load of console goo. */ 246 #include "vga.h" 247 #if NVGA > 0 248 #include <dev/ic/mc6845reg.h> 249 #include <dev/ic/pcdisplayvar.h> 250 #include <dev/ic/vgareg.h> 251 #include <dev/ic/vgavar.h> 252 #endif 253 254 #include "com.h" 255 #if NCOM > 0 256 #include <dev/ic/comreg.h> 257 #include <dev/ic/comvar.h> 258 #endif 259 260 #include "sscom.h" 261 #if NSSCOM > 0 262 #include "opt_sscom.h" 263 #include <arm/s3c2xx0/sscom_var.h> 264 #endif 265 266 /* 267 * Define the default console speed for the board. This is generally 268 * what the firmware provided with the board defaults to. 269 */ 270 #ifndef CONSPEED 271 #define CONSPEED B115200 /* TTYDEF_SPEED */ 272 #endif 273 #ifndef CONMODE 274 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 275 #endif 276 277 int comcnspeed = CONSPEED; 278 int comcnmode = CONMODE; 279 280 /* 281 * void cpu_reboot(int howto, char *bootstr) 282 * 283 * Reboots the system 284 * 285 * Deal with any syncing, unmounting, dumping and shutdown hooks, 286 * then reset the CPU. 287 */ 288 void 289 cpu_reboot(int howto, char *bootstr) 290 { 291 292 cpu_reset_address = vtophys((u_int)s3c2800_softreset); 293 294 /* 295 * If we are still cold then hit the air brakes 296 * and crash to earth fast 297 */ 298 if (cold) { 299 doshutdownhooks(); 300 printf("The operating system has halted.\n"); 301 printf("Please press any key to reboot.\n\n"); 302 cngetc(); 303 printf("rebooting...\n"); 304 cpu_reset(); 305 /* NOTREACHED */ 306 } 307 /* Disable console buffering */ 308 309 /* 310 * If RB_NOSYNC was not specified sync the discs. 311 * Note: Unless cold is set to 1 here, syslogd will die during the 312 * unmount. It looks like syslogd is getting woken up only to find 313 * that it cannot page part of the binary in as the filesystem has 314 * been unmounted. 315 */ 316 if (!(howto & RB_NOSYNC)) 317 bootsync(); 318 319 /* Say NO to interrupts */ 320 splhigh(); 321 322 /* Do a dump if requested. */ 323 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 324 dumpsys(); 325 326 /* Run any shutdown hooks */ 327 doshutdownhooks(); 328 329 /* Make sure IRQ's are disabled */ 330 IRQdisable; 331 332 if (howto & RB_HALT) { 333 printf("The operating system has halted.\n"); 334 printf("Please press any key to reboot.\n\n"); 335 cngetc(); 336 } 337 printf("rebooting...\n"); 338 cpu_reset(); 339 /* NOTREACHED */ 340 } 341 342 /* 343 * All built-in peripheral registers are statically mapped in start up 344 * routine. This table tells pmap subsystem about it, and to map them 345 * at the same position. 346 */ 347 static const struct pmap_devmap smdk2800_devmap[] = { 348 { 349 SMDK2800_IO_AREA_VBASE, 350 S3C2800_PERIPHERALS, 351 S3C2800_PERIPHERALS_SIZE, 352 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 353 }, 354 { 0, 0, 0, 0 } 355 }; 356 357 #define ioreg_vaddr(pa) ((pa) - S3C2800_PERIPHERALS + SMDK2800_IO_AREA_VBASE) 358 #define ioreg32(pa) (*(volatile uint32_t *)ioreg_vaddr(pa)) 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 */ 373 374 u_int 375 initarm(void *arg) 376 { 377 int loop; 378 int loop1; 379 u_int l1pagetable; 380 extern int etext __asm("_etext"); 381 extern int end __asm("_end"); 382 int progress_counter = 0; 383 384 #ifdef DO_MEMORY_DISK 385 vm_offset_t md_root_start; 386 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 387 #endif 388 389 #define gpio8(reg) (*(volatile uint8_t *)(ioreg_vaddr(S3C2800_GPIO_BASE) + (reg))) 390 391 #define LEDSTEP() __LED(progress_counter++) 392 393 #define pdatc gpio8(GPIO_PDATC) 394 #define __LED(x) (pdatc = (pdatc & ~0x07) | (~(x) & 0x07)) 395 396 LEDSTEP(); 397 /* 398 * Heads up ... Setup the CPU / MMU / TLB functions 399 */ 400 if (set_cpufuncs()) 401 panic("CPU not recognized!"); 402 403 LEDSTEP(); 404 405 406 /* Disable all peripheral interrupts */ 407 ioreg32(S3C2800_INTCTL_BASE + INTCTL_INTMSK) = 0; 408 409 consinit(); 410 #ifdef VERBOSE_INIT_ARM 411 printf("consinit done\n"); 412 #endif 413 414 #ifdef KGDB 415 LEDSTEP(); 416 kgdb_port_init(); 417 #endif 418 LEDSTEP(); 419 420 #ifdef VERBOSE_INIT_ARM 421 /* Talk to the user */ 422 printf("\nNetBSD/evbarm (SMDK2800) booting ...\n"); 423 #endif 424 425 /* 426 * Ok we have the following memory map 427 * 428 * Physical Address Range Description 429 * ----------------------- ---------------------------------- 430 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 431 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 432 * or (depend on DIPSW setting) 433 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 434 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 435 * 436 * 0x08000000 - 0x09ffffff SDRAM (32MB) 437 * 0x20000000 - 0x3fffffff PCI space 438 * 439 * The initarm() has the responsibility for creating the kernel 440 * page tables. 441 * It must also set up various memory pointers that are used 442 * by pmap etc. 443 */ 444 445 /* Fake bootconfig structure for the benefit of pmap.c */ 446 /* XXX must make the memory description h/w independent */ 447 bootconfig.dramblocks = 1; 448 bootconfig.dram[0].address = SDRAM_START; 449 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 450 451 /* 452 * Set up the variables that define the availablilty of 453 * physical memory. For now, we're going to set 454 * physical_freestart to 0x08200000 (where the kernel 455 * was loaded), and allocate the memory we need downwards. 456 * If we get too close to the bottom of SDRAM, we 457 * will panic. We will update physical_freestart and 458 * physical_freeend later to reflect what pmap_bootstrap() 459 * wants to see. 460 * 461 * XXX pmap_bootstrap() needs an enema. 462 */ 463 physical_start = bootconfig.dram[0].address; 464 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 465 466 #if DO_MEMORY_DISK 467 #ifdef MEMORY_DISK_ROOT_ROM 468 md_root_start = MEMORY_DISK_ROOT_ADDR; 469 boothowto |= RB_RDONLY; 470 #else 471 /* Reserve physmem for ram disk */ 472 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 473 printf("Reserve %ld bytes for memory disk\n", 474 physical_end - md_root_start); 475 /* copy fs contents */ 476 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 477 MD_ROOT_SIZE); 478 physical_end = md_root_start; 479 #endif 480 #endif 481 482 physical_freestart = 0x08000000UL; /* XXX */ 483 physical_freeend = 0x08200000UL; 484 485 physmem = (physical_end - physical_start) / PAGE_SIZE; 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 * XXX 495 * Okay, the kernel starts 2MB in from the bottom of physical 496 * memory. We are going to allocate our bootstrap pages downwards 497 * from there. 498 * 499 * We need to allocate some fixed page tables to get the kernel 500 * going. We allocate one page directory and a number of page 501 * tables and store the physical addresses in the kernel_pt_table 502 * array. 503 * 504 * The kernel page directory must be on a 16K boundary. The page 505 * tables must be on 4K boundaries. What we do is allocate the 506 * page directory on the first 16K boundary that we encounter, and 507 * the page tables on 4K boundaries otherwise. Since we allocate 508 * at least 3 L2 page tables, we are guaranteed to encounter at 509 * least one 16K aligned region. 510 */ 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("Allocating page tables\n"); 514 #endif 515 516 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 517 518 #ifdef VERBOSE_INIT_ARM 519 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 520 physical_freestart, free_pages, free_pages); 521 #endif 522 523 /* Define a macro to simplify memory allocation */ 524 #define valloc_pages(var, np) \ 525 alloc_pages((var).pv_pa, (np)); \ 526 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 527 528 #define alloc_pages(var, np) \ 529 physical_freeend -= ((np) * PAGE_SIZE); \ 530 if (physical_freeend < physical_freestart) \ 531 panic("initarm: out of memory"); \ 532 (var) = physical_freeend; \ 533 free_pages -= (np); \ 534 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 535 536 loop1 = 0; 537 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 538 /* Are we 16KB aligned for an L1 ? */ 539 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 540 && kernel_l1pt.pv_pa == 0) { 541 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 542 } else { 543 valloc_pages(kernel_pt_table[loop1], 544 L2_TABLE_SIZE / PAGE_SIZE); 545 ++loop1; 546 } 547 } 548 549 /* This should never be able to happen but better confirm that. */ 550 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 551 panic("initarm: Failed to align the kernel page directory\n"); 552 553 /* 554 * Allocate a page for the system page mapped to V0x00000000 555 * This page will just contain the system vectors and can be 556 * shared by all processes. 557 */ 558 alloc_pages(systempage.pv_pa, 1); 559 560 /* Allocate stacks for all modes */ 561 valloc_pages(irqstack, IRQ_STACK_SIZE); 562 valloc_pages(abtstack, ABT_STACK_SIZE); 563 valloc_pages(undstack, UND_STACK_SIZE); 564 valloc_pages(kernelstack, UPAGES); 565 566 #ifdef VERBOSE_INIT_ARM 567 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 568 irqstack.pv_va); 569 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 570 abtstack.pv_va); 571 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 572 undstack.pv_va); 573 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 574 kernelstack.pv_va); 575 #endif 576 577 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 578 579 LEDSTEP(); 580 581 /* 582 * Ok we have allocated physical pages for the primary kernel 583 * page tables 584 */ 585 586 #ifdef VERBOSE_INIT_ARM 587 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 588 #endif 589 590 /* 591 * Now we start construction of the L1 page table 592 * We start by mapping the L2 page tables into the L1. 593 * This means that we can replace L1 mappings later on if necessary 594 */ 595 l1pagetable = kernel_l1pt.pv_pa; 596 597 /* Map the L2 pages tables in the L1 page table */ 598 pmap_link_l2pt(l1pagetable, 0x00000000, 599 &kernel_pt_table[KERNEL_PT_SYS]); 600 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 601 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 602 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 603 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 604 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 605 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 606 607 /* update the top of the kernel VM */ 608 pmap_curmaxkvaddr = 609 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 610 611 #ifdef VERBOSE_INIT_ARM 612 printf("Mapping kernel\n"); 613 #endif 614 615 /* Now we fill in the L2 pagetable for the kernel static code/data */ 616 { 617 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 618 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 619 u_int logical; 620 621 textsize = (textsize + PGOFSET) & ~PGOFSET; 622 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 623 624 logical = 0x00200000; /* offset of kernel in RAM */ 625 626 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 627 physical_start + logical, textsize, 628 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 629 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 630 physical_start + logical, totalsize - textsize, 631 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 632 } 633 634 #ifdef VERBOSE_INIT_ARM 635 printf("Constructing L2 page tables\n"); 636 #endif 637 638 /* Map the stack pages */ 639 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 640 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 641 PTE_CACHE); 642 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 643 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 644 PTE_CACHE); 645 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 646 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 647 PTE_CACHE); 648 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 649 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 650 651 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 652 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 653 654 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 655 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 656 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 657 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 658 } 659 660 /* Map the vector page. */ 661 #if 1 662 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 663 * cache-clean code there. */ 664 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 665 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 666 #else 667 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 668 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 669 #endif 670 671 #ifdef MEMORY_DISK_DYNAMIC 672 /* map MD root image */ 673 pmap_map_chunk(l1pagetable, SMDK2800_MEMORY_DISK_VADDR, md_root_start, 674 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 675 676 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 677 #endif /* MEMORY_DISK_DYNAMIC */ 678 /* 679 * map integrated peripherals at same address in l1pagetable 680 * so that we can continue to use console. 681 */ 682 pmap_devmap_bootstrap(l1pagetable, smdk2800_devmap); 683 684 /* 685 * Now we have the real page tables in place so we can switch to them. 686 * Once this is done we will be running with the REAL kernel page 687 * tables. 688 */ 689 690 /* 691 * Update the physical_freestart/physical_freeend/free_pages 692 * variables. 693 */ 694 { 695 physical_freestart = physical_start + 696 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 697 physical_freeend = physical_end; 698 free_pages = 699 (physical_freeend - physical_freestart) / PAGE_SIZE; 700 } 701 702 /* Switch tables */ 703 #ifdef VERBOSE_INIT_ARM 704 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 705 physical_freestart, free_pages, free_pages); 706 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 707 #endif 708 LEDSTEP(); 709 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 710 setttb(kernel_l1pt.pv_pa); 711 cpu_tlb_flushID(); 712 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 713 714 /* 715 * Moved from cpu_startup() as data_abort_handler() references 716 * this during uvm init 717 */ 718 proc0paddr = (struct user *)kernelstack.pv_va; 719 lwp0.l_addr = proc0paddr; 720 721 #ifdef VERBOSE_INIT_ARM 722 printf("done!\n"); 723 #endif 724 725 #if 0 726 /* 727 * The IFPGA registers have just moved. 728 * Detach the diagnostic serial port and reattach at the new address. 729 */ 730 plcomcndetach(); 731 /* 732 * XXX this should only be done in main() but it useful to 733 * have output earlier ... 734 */ 735 consinit(); 736 #endif 737 738 LEDSTEP(); 739 #ifdef VERBOSE_INIT_ARM 740 printf("bootstrap done.\n"); 741 #endif 742 743 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 744 745 /* 746 * Pages were allocated during the secondary bootstrap for the 747 * stacks for different CPU modes. 748 * We must now set the r13 registers in the different CPU modes to 749 * point to these stacks. 750 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 751 * of the stack memory. 752 */ 753 #ifdef VERBOSE_INIT_ARM 754 printf("init subsystems: stacks "); 755 #endif 756 757 set_stackptr(PSR_IRQ32_MODE, 758 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 759 set_stackptr(PSR_ABT32_MODE, 760 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 761 set_stackptr(PSR_UND32_MODE, 762 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 763 764 LEDSTEP(); 765 766 /* 767 * Well we should set a data abort handler. 768 * Once things get going this will change as we will need a proper 769 * handler. 770 * Until then we will use a handler that just panics but tells us 771 * why. 772 * Initialisation of the vectors will just panic on a data abort. 773 * This just fills in a slightly better one. 774 */ 775 #ifdef VERBOSE_INIT_ARM 776 printf("vectors "); 777 #endif 778 data_abort_handler_address = (u_int)data_abort_handler; 779 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 780 undefined_handler_address = (u_int)undefinedinstruction_bounce; 781 782 /* Initialise the undefined instruction handlers */ 783 #ifdef VERBOSE_INIT_ARM 784 printf("undefined "); 785 #endif 786 undefined_init(); 787 788 LEDSTEP(); 789 790 /* Load memory into UVM. */ 791 #ifdef VERBOSE_INIT_ARM 792 printf("page "); 793 #endif 794 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 795 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 796 atop(physical_freestart), atop(physical_freeend), 797 VM_FREELIST_DEFAULT); 798 799 LEDSTEP(); 800 /* Boot strap pmap telling it where the kernel page table is */ 801 #ifdef VERBOSE_INIT_ARM 802 printf("pmap "); 803 #endif 804 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 805 806 LEDSTEP(); 807 808 /* Setup the IRQ system */ 809 #ifdef VERBOSE_INIT_ARM 810 printf("irq "); 811 #endif 812 /* XXX irq_init(); */ 813 814 #ifdef VERBOSE_INIT_ARM 815 printf("done.\n"); 816 #endif 817 818 #ifdef BOOTHOWTO_INIT 819 boothowto |= BOOTHOWTO_INIT; 820 #endif 821 { 822 uint8_t gpio = ~gpio8(GPIO_PDATF); 823 824 if (gpio & (1<<5)) /* SW3 */ 825 boothowto ^= RB_SINGLE; 826 if (gpio & (1<<7)) /* SW7 */ 827 boothowto ^= RB_KDB; 828 #ifdef VERBOSE_INIT_ARM 829 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 830 #endif 831 } 832 833 #ifdef IPKDB 834 /* Initialise ipkdb */ 835 ipkdb_init(); 836 if (boothowto & RB_KDB) 837 ipkdb_connect(0); 838 #endif 839 840 #ifdef KGDB 841 if (boothowto & RB_KDB) { 842 kgdb_debug_init = 1; 843 kgdb_connect(1); 844 } 845 #endif 846 847 #if NKSYMS || defined(DDB) || defined(LKM) 848 /* Firmware doesn't load symbols. */ 849 ksyms_init(0, NULL, NULL); 850 #endif 851 852 #ifdef DDB 853 db_machine_init(); 854 if (boothowto & RB_KDB) 855 Debugger(); 856 #endif 857 858 /* We return the new stack pointer address */ 859 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 860 } 861 862 void 863 consinit(void) 864 { 865 static int consinit_done = 0; 866 bus_space_tag_t iot = &s3c2xx0_bs_tag; 867 int pclk; 868 869 if (consinit_done != 0) 870 return; 871 872 consinit_done = 1; 873 874 pmap_devmap_register(smdk2800_devmap); 875 876 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), NULL, NULL, &pclk); 877 878 #if NSSCOM > 0 879 #ifdef SSCOM0CONSOLE 880 if (0 == s3c2800_sscom_cnattach(iot, 0, comcnspeed, 881 pclk, comcnmode)) 882 return; 883 #endif 884 #ifdef SSCOM1CONSOLE 885 if (0 == s3c2800_sscom_cnattach(iot, 1, comcnspeed, 886 pclk, comcnmode)) 887 return; 888 #endif 889 #endif /* NSSCOM */ 890 #if NCOM>0 && defined(CONCOMADDR) 891 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 892 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 893 panic("can't init serial console @%x", CONCOMADDR); 894 return; 895 #endif 896 897 consinit_done = 0; 898 } 899 900 901 #ifdef KGDB 902 903 #if (NSSCOM > 0) 904 905 #ifdef KGDB_DEVNAME 906 const char kgdb_devname[] = KGDB_DEVNAME; 907 #else 908 const char kgdb_devname[] = ""; 909 #endif 910 911 #ifndef KGDB_DEVMODE 912 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 913 #endif 914 int kgdb_sscom_mode = KGDB_DEVMODE; 915 916 #endif /* NSSCOM */ 917 918 void 919 kgdb_port_init(void) 920 { 921 #if (NSSCOM > 0) 922 int unit = -1; 923 int pclk; 924 925 if (strcmp(kgdb_devname, "sscom0") == 0) 926 unit = 0; 927 else if (strcmp(kgdb_devname, "sscom1") == 0) 928 unit = 1; 929 930 if (unit >= 0) { 931 s3c2800_clock_freq2(ioreg_vaddr(S3C2800_CLKMAN_BASE), 932 NULL, NULL, &pclk); 933 934 s3c2800_sscom_kgdb_attach(&s3c2xx0_bs_tag, 935 unit, kgdb_rate, pclk, kgdb_sscom_mode); 936 } 937 #endif 938 } 939 #endif 940
Indexes created Wed Oct 22 13:09:56 GMT 2025