smdk2410_machdep.c revision 1.3
1 /* $NetBSD: smdk2410_machdep.c,v 1.3 2003/08/04 12:37:43 bsh Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 Fujitsu Component Limited 5 * Copyright (c) 2002, 2003 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 * Copyright (c) 2001,2002 ARM Ltd 36 * All rights reserved. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. The name of the company may not be used to endorse or promote 47 * products derived from this software without specific prior written 48 * permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND 51 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 52 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 53 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD 54 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 55 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 56 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 57 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 58 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 59 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 60 * POSSIBILITY OF SUCH DAMAGE. 61 * 62 */ 63 64 /* 65 * Copyright (c) 1997,1998 Mark Brinicombe. 66 * Copyright (c) 1997,1998 Causality Limited. 67 * All rights reserved. 68 * 69 * Redistribution and use in source and binary forms, with or without 70 * modification, are permitted provided that the following conditions 71 * are met: 72 * 1. Redistributions of source code must retain the above copyright 73 * notice, this list of conditions and the following disclaimer. 74 * 2. Redistributions in binary form must reproduce the above copyright 75 * notice, this list of conditions and the following disclaimer in the 76 * documentation and/or other materials provided with the distribution. 77 * 3. All advertising materials mentioning features or use of this software 78 * must display the following acknowledgement: 79 * This product includes software developed by Mark Brinicombe 80 * for the NetBSD Project. 81 * 4. The name of the company nor the name of the author may be used to 82 * endorse or promote products derived from this software without specific 83 * prior written permission. 84 * 85 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 86 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 87 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 88 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 89 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 90 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 91 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 92 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 93 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 94 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 95 * SUCH DAMAGE. 96 * 97 * Machine dependant functions for kernel setup for integrator board 98 * 99 * Created : 24/11/97 100 */ 101 102 /* 103 * Machine dependant functions for kernel setup for Samsung SMDK2410 104 * derived from integrator_machdep.c 105 */ 106 107 #include <sys/cdefs.h> 108 __KERNEL_RCSID(0, "$NetBSD: smdk2410_machdep.c,v 1.3 2003/08/04 12:37:43 bsh Exp $"); 109 110 #include "opt_ddb.h" 111 #include "opt_kgdb.h" 112 #include "opt_ipkdb.h" 113 #include "opt_pmap_debug.h" 114 #include "opt_md.h" 115 116 #include <sys/param.h> 117 #include <sys/device.h> 118 #include <sys/systm.h> 119 #include <sys/kernel.h> 120 #include <sys/exec.h> 121 #include <sys/proc.h> 122 #include <sys/msgbuf.h> 123 #include <sys/reboot.h> 124 #include <sys/termios.h> 125 #include <sys/ksyms.h> 126 127 #include <uvm/uvm_extern.h> 128 129 #include <dev/cons.h> 130 #include <dev/md.h> 131 132 #include <machine/db_machdep.h> 133 #include <ddb/db_sym.h> 134 #include <ddb/db_extern.h> 135 #ifdef KGDB 136 #include <sys/kgdb.h> 137 #endif 138 139 #include <machine/bootconfig.h> 140 #include <machine/bus.h> 141 #include <machine/cpu.h> 142 #include <machine/frame.h> 143 #include <machine/intr.h> 144 #include <arm/undefined.h> 145 146 #include <arm/arm32/machdep.h> 147 148 #include <arm/s3c2xx0/s3c2410reg.h> 149 #include <arm/s3c2xx0/s3c2410var.h> 150 151 #include "ksyms.h" 152 153 #ifndef SDRAM_START 154 #define SDRAM_START S3C2410_SDRAM_START 155 #endif 156 #ifndef SDRAM_SIZE 157 #define SDRAM_SIZE (32*1024*1024) 158 #endif 159 160 /* 161 * Address to map I/O registers in early initialize stage. 162 */ 163 #define SMDK2410_VBASE_FREE 0xfd000000 164 165 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 166 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 167 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 168 169 /* 170 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 171 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 172 */ 173 #define KERNEL_VM_SIZE 0x0C000000 174 175 /* Memory disk support */ 176 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 177 #define DO_MEMORY_DISK 178 /* We have memory disk image outside of the kernel on ROM. */ 179 #ifdef MEMORY_DISK_ROOT_ROM 180 /* map the image directory and use read-only */ 181 #else 182 /* copy the image to RAM */ 183 #endif 184 #endif 185 186 187 /* 188 * Address to call from cpu_reset() to reset the machine. 189 * This is machine architecture dependant as it varies depending 190 * on where the ROM appears when you turn the MMU off. 191 */ 192 u_int cpu_reset_address = (u_int)0; 193 194 /* Define various stack sizes in pages */ 195 #define IRQ_STACK_SIZE 1 196 #define ABT_STACK_SIZE 1 197 #ifdef IPKDB 198 #define UND_STACK_SIZE 2 199 #else 200 #define UND_STACK_SIZE 1 201 #endif 202 203 BootConfig bootconfig; /* Boot config storage */ 204 char *boot_args = NULL; 205 char *boot_file = NULL; 206 207 vm_offset_t physical_start; 208 vm_offset_t physical_freestart; 209 vm_offset_t physical_freeend; 210 vm_offset_t physical_end; 211 u_int free_pages; 212 vm_offset_t pagetables_start; 213 int physmem = 0; 214 215 /*int debug_flags;*/ 216 #ifndef PMAP_STATIC_L1S 217 int max_processes = 64; /* Default number */ 218 #endif /* !PMAP_STATIC_L1S */ 219 220 /* Physical and virtual addresses for some global pages */ 221 pv_addr_t systempage; 222 pv_addr_t irqstack; 223 pv_addr_t undstack; 224 pv_addr_t abtstack; 225 pv_addr_t kernelstack; 226 227 vm_offset_t msgbufphys; 228 229 extern u_int data_abort_handler_address; 230 extern u_int prefetch_abort_handler_address; 231 extern u_int undefined_handler_address; 232 233 #ifdef PMAP_DEBUG 234 extern int pmap_debug_level; 235 #endif 236 237 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 238 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 239 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 240 241 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 242 243 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 244 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 245 246 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 247 248 struct user *proc0paddr; 249 250 /* Prototypes */ 251 252 void consinit(void); 253 void kgdb_port_init(void); 254 255 static int 256 bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 257 int cacheable, bus_space_handle_t * bshp); 258 static void copy_io_area_map(pd_entry_t * new_pd); 259 extern int s3c24x0_calc_fclk(unsigned int pllcon); 260 261 /* A load of console goo. */ 262 #include "vga.h" 263 #if NVGA > 0 264 #include <dev/ic/mc6845reg.h> 265 #include <dev/ic/pcdisplayvar.h> 266 #include <dev/ic/vgareg.h> 267 #include <dev/ic/vgavar.h> 268 #endif 269 270 #include "com.h" 271 #if NCOM > 0 272 #include <dev/ic/comreg.h> 273 #include <dev/ic/comvar.h> 274 #endif 275 276 #include "sscom.h" 277 #if NSSCOM > 0 278 #include "opt_sscom.h" 279 #include <arm/s3c2xx0/sscom_var.h> 280 #endif 281 282 /* 283 * Define the default console speed for the board. This is generally 284 * what the firmware provided with the board defaults to. 285 */ 286 #ifndef CONSPEED 287 #define CONSPEED B115200 /* TTYDEF_SPEED */ 288 #endif 289 #ifndef CONMODE 290 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 291 #endif 292 293 int comcnspeed = CONSPEED; 294 int comcnmode = CONMODE; 295 296 struct bus_space bootstrap_bs_tag; 297 298 /* 299 * void cpu_reboot(int howto, char *bootstr) 300 * 301 * Reboots the system 302 * 303 * Deal with any syncing, unmounting, dumping and shutdown hooks, 304 * then reset the CPU. 305 */ 306 void 307 cpu_reboot(int howto, char *bootstr) 308 { 309 #ifdef DIAGNOSTIC 310 /* info */ 311 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 312 #endif 313 314 cpu_reset_address = vtophys((u_int)s3c2410_softreset); 315 316 /* 317 * If we are still cold then hit the air brakes 318 * and crash to earth fast 319 */ 320 if (cold) { 321 doshutdownhooks(); 322 printf("The operating system has halted.\n"); 323 printf("Please press any key to reboot.\n\n"); 324 cngetc(); 325 printf("rebooting...\n"); 326 cpu_reset(); 327 /* NOTREACHED */ 328 } 329 /* Disable console buffering */ 330 331 /* 332 * If RB_NOSYNC was not specified sync the discs. 333 * Note: Unless cold is set to 1 here, syslogd will die during the 334 * unmount. It looks like syslogd is getting woken up only to find 335 * that it cannot page part of the binary in as the filesystem has 336 * been unmounted. 337 */ 338 if (!(howto & RB_NOSYNC)) 339 bootsync(); 340 341 /* Say NO to interrupts */ 342 splhigh(); 343 344 /* Do a dump if requested. */ 345 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 346 dumpsys(); 347 348 /* Run any shutdown hooks */ 349 doshutdownhooks(); 350 351 /* Make sure IRQ's are disabled */ 352 IRQdisable; 353 354 if (howto & RB_HALT) { 355 printf("The operating system has halted.\n"); 356 printf("Please press any key to reboot.\n\n"); 357 cngetc(); 358 } 359 printf("rebooting...\n"); 360 cpu_reset(); 361 /* NOTREACHED */ 362 } 363 364 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 365 366 /* 367 * u_int initarm(...) 368 * 369 * Initial entry point on startup. This gets called before main() is 370 * entered. 371 * It should be responsible for setting up everything that must be 372 * in place when main is called. 373 * This includes 374 * Taking a copy of the boot configuration structure. 375 * Initialising the physical console so characters can be printed. 376 * Setting up page tables for the kernel 377 * Relocating the kernel to the bottom of physical memory 378 */ 379 380 u_int 381 initarm(void *arg) 382 { 383 int loop; 384 int loop1; 385 u_int l1pagetable; 386 extern int etext asm("_etext"); 387 extern int end asm("_end"); 388 pv_addr_t kernel_l1pt; 389 struct s3c24x0_softc temp_softc; /* used to initialize IO regs */ 390 int progress_counter = 0; 391 392 #ifdef DO_MEMORY_DISK 393 vm_offset_t md_root_start; 394 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 395 #endif 396 397 #define gpio_read8(reg) bus_space_read_1(temp_softc.sc_sx.sc_iot, \ 398 temp_softc.sc_sx.sc_gpio_ioh, (reg)) 399 400 #define LEDSTEP() __LED(progress_counter++) 401 402 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 403 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 404 405 LEDSTEP(); 406 /* 407 * Heads up ... Setup the CPU / MMU / TLB functions 408 */ 409 if (set_cpufuncs()) 410 panic("cpu not recognized!"); 411 412 LEDSTEP(); 413 414 /* 415 * prepare fake bus space tag 416 */ 417 bootstrap_bs_tag = s3c2xx0_bs_tag; 418 bootstrap_bs_tag.bs_map = bootstrap_bs_map; 419 s3c2xx0_softc = &temp_softc.sc_sx; 420 s3c2xx0_softc->sc_iot = &bootstrap_bs_tag; 421 422 bootstrap_bs_map(&bootstrap_bs_tag, S3C2410_GPIO_BASE, 423 S3C2410_GPIO_SIZE, 0, &temp_softc.sc_sx.sc_gpio_ioh); 424 bootstrap_bs_map(&bootstrap_bs_tag, S3C2410_INTCTL_BASE, 425 S3C2410_INTCTL_SIZE, 0, &temp_softc.sc_sx.sc_intctl_ioh); 426 bootstrap_bs_map(&bootstrap_bs_tag, S3C2410_CLKMAN_BASE, 427 S3C2410_CLKMAN_SIZE, 0, &temp_softc.sc_sx.sc_clkman_ioh); 428 429 #undef __LED 430 #define __LED(x) \ 431 bus_space_write_1(&bootstrap_bs_tag, temp_softc.sc_sx.sc_gpio_ioh, \ 432 GPIO_PFDAT, (~((x)<<4) & 0xf0) | \ 433 (gpio_read8(GPIO_PFDAT) & ~0xf0)) 434 435 LEDSTEP(); 436 437 /* Disable all peripheral interrupts */ 438 bus_space_write_4(&bootstrap_bs_tag, temp_softc.sc_sx.sc_intctl_ioh, 439 INTCTL_INTMSK, 0); 440 441 s3c24x0_clock_freq(s3c2xx0_softc); 442 443 consinit(); 444 #ifdef VERBOSE_INIT_ARM 445 printf("consinit done\n"); 446 #endif 447 448 #ifdef KGDB 449 LEDSTEP(); 450 kgdb_port_init(); 451 #endif 452 LEDSTEP(); 453 454 #ifdef VERBOSE_INIT_ARM 455 /* Talk to the user */ 456 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 457 #endif 458 /* 459 * Ok we have the following memory map 460 * 461 * Physical Address Range Description 462 * ----------------------- ---------------------------------- 463 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 464 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 465 * or (depend on DIPSW setting) 466 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 467 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 468 * 469 * 0x30000000 - 0x31ffffff SDRAM (32MB) 470 * 471 * The initarm() has the responsibility for creating the kernel 472 * page tables. 473 * It must also set up various memory pointers that are used 474 * by pmap etc. 475 */ 476 477 /* Fake bootconfig structure for the benefit of pmap.c */ 478 /* XXX must make the memory description h/w independent */ 479 bootconfig.dramblocks = 1; 480 bootconfig.dram[0].address = SDRAM_START; 481 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 482 483 /* 484 * Set up the variables that define the availablilty of 485 * physical memory. For now, we're going to set 486 * physical_freestart to 0x08200000 (where the kernel 487 * was loaded), and allocate the memory we need downwards. 488 * If we get too close to the bottom of SDRAM, we 489 * will panic. We will update physical_freestart and 490 * physical_freeend later to reflect what pmap_bootstrap() 491 * wants to see. 492 * 493 * XXX pmap_bootstrap() needs an enema. 494 */ 495 physical_start = bootconfig.dram[0].address; 496 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 497 498 #ifdef DO_MEMORY_DISK 499 #ifdef MEMORY_DISK_ROOT_ROM 500 md_root_start = MEMORY_DISK_ROOT_ADDR; 501 boothowto |= RB_RDONLY; 502 #else 503 /* Reserve physmem for ram disk */ 504 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 505 printf("Reserve %ld bytes for memory disk\n", 506 physical_end - md_root_start); 507 /* copy fs contents */ 508 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 509 MD_ROOT_SIZE); 510 physical_end = md_root_start; 511 #endif 512 #endif 513 514 physical_freestart = SDRAM_START; /* XXX */ 515 physical_freeend = SDRAM_START + 0x00200000; 516 517 physmem = (physical_end - physical_start) / PAGE_SIZE; 518 519 #ifdef VERBOSE_INIT_ARM 520 /* Tell the user about the memory */ 521 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 522 physical_start, physical_end - 1); 523 #endif 524 525 /* 526 * XXX 527 * Okay, the kernel starts 2MB in from the bottom of physical 528 * memory. We are going to allocate our bootstrap pages downwards 529 * from there. 530 * 531 * We need to allocate some fixed page tables to get the kernel 532 * going. We allocate one page directory and a number of page 533 * tables and store the physical addresses in the kernel_pt_table 534 * array. 535 * 536 * The kernel page directory must be on a 16K boundary. The page 537 * tables must be on 4K bounaries. What we do is allocate the 538 * page directory on the first 16K boundary that we encounter, and 539 * the page tables on 4K boundaries otherwise. Since we allocate 540 * at least 3 L2 page tables, we are guaranteed to encounter at 541 * least one 16K aligned region. 542 */ 543 544 #ifdef VERBOSE_INIT_ARM 545 printf("Allocating page tables\n"); 546 #endif 547 548 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 549 550 #ifdef VERBOSE_INIT_ARM 551 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 552 physical_freestart, free_pages, free_pages); 553 #endif 554 555 /* Define a macro to simplify memory allocation */ 556 #define valloc_pages(var, np) \ 557 alloc_pages((var).pv_pa, (np)); \ 558 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 559 560 #define alloc_pages(var, np) \ 561 physical_freeend -= ((np) * PAGE_SIZE); \ 562 if (physical_freeend < physical_freestart) \ 563 panic("initarm: out of memory"); \ 564 (var) = physical_freeend; \ 565 free_pages -= (np); \ 566 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 567 568 loop1 = 0; 569 kernel_l1pt.pv_pa = 0; 570 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 571 /* Are we 16KB aligned for an L1 ? */ 572 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 573 && kernel_l1pt.pv_pa == 0) { 574 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 575 } else { 576 valloc_pages(kernel_pt_table[loop1], 577 L2_TABLE_SIZE / PAGE_SIZE); 578 ++loop1; 579 } 580 } 581 582 /* This should never be able to happen but better confirm that. */ 583 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 584 panic("initarm: Failed to align the kernel page directory\n"); 585 586 /* 587 * Allocate a page for the system page mapped to V0x00000000 588 * This page will just contain the system vectors and can be 589 * shared by all processes. 590 */ 591 alloc_pages(systempage.pv_pa, 1); 592 593 /* Allocate stacks for all modes */ 594 valloc_pages(irqstack, IRQ_STACK_SIZE); 595 valloc_pages(abtstack, ABT_STACK_SIZE); 596 valloc_pages(undstack, UND_STACK_SIZE); 597 valloc_pages(kernelstack, UPAGES); 598 599 #ifdef VERBOSE_INIT_ARM 600 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 601 irqstack.pv_va); 602 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 603 abtstack.pv_va); 604 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 605 undstack.pv_va); 606 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 607 kernelstack.pv_va); 608 #endif 609 610 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 611 612 LEDSTEP(); 613 614 /* 615 * Ok we have allocated physical pages for the primary kernel 616 * page tables 617 */ 618 619 #ifdef VERBOSE_INIT_ARM 620 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 621 #endif 622 623 /* 624 * Now we start construction of the L1 page table 625 * We start by mapping the L2 page tables into the L1. 626 * This means that we can replace L1 mappings later on if necessary 627 */ 628 l1pagetable = kernel_l1pt.pv_pa; 629 630 /* Map the L2 pages tables in the L1 page table */ 631 pmap_link_l2pt(l1pagetable, 0x00000000, 632 &kernel_pt_table[KERNEL_PT_SYS]); 633 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 634 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 635 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 636 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 637 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 638 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 639 640 /* update the top of the kernel VM */ 641 pmap_curmaxkvaddr = 642 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 643 644 #ifdef VERBOSE_INIT_ARM 645 printf("Mapping kernel\n"); 646 #endif 647 648 /* Now we fill in the L2 pagetable for the kernel static code/data */ 649 { 650 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 651 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 652 u_int logical; 653 654 textsize = (textsize + PGOFSET) & ~PGOFSET; 655 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 656 657 logical = 0x00200000; /* offset of kernel in RAM */ 658 659 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 660 physical_start + logical, textsize, 661 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 662 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 663 physical_start + logical, totalsize - textsize, 664 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 665 } 666 667 #ifdef VERBOSE_INIT_ARM 668 printf("Constructing L2 page tables\n"); 669 #endif 670 671 /* Map the stack pages */ 672 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 673 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 674 PTE_CACHE); 675 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 676 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 677 PTE_CACHE); 678 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 679 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 680 PTE_CACHE); 681 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 682 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 683 684 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 685 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 686 687 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 688 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 689 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 690 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 691 } 692 693 /* Map the vector page. */ 694 #if 1 695 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 696 * cache-clean code there. */ 697 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 698 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 699 #else 700 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 701 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 702 #endif 703 704 #ifdef MEMORY_DISK_DYNAMIC 705 /* map MD root image */ 706 bootstrap_bs_map(&bootstrap_bs_tag, md_root_start, MD_ROOT_SIZE, 707 BUS_SPACE_MAP_CACHEABLE | BUS_SPACE_MAP_LINEAR, 708 (bus_space_handle_t *)&md_root_start); 709 710 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 711 #endif /* MEMORY_DISK_DYNAMIC */ 712 /* 713 * map integrated peripherals at same address in l1pagetable 714 * so that we can continue to use console. 715 */ 716 copy_io_area_map((pd_entry_t *)l1pagetable); 717 718 /* 719 * Now we have the real page tables in place so we can switch to them. 720 * Once this is done we will be running with the REAL kernel page 721 * tables. 722 */ 723 724 /* 725 * Update the physical_freestart/physical_freeend/free_pages 726 * variables. 727 */ 728 { 729 physical_freestart = physical_start + 730 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 731 physical_freeend = physical_end; 732 free_pages = 733 (physical_freeend - physical_freestart) / PAGE_SIZE; 734 } 735 736 /* Switch tables */ 737 #ifdef VERBOSE_INIT_ARM 738 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 739 physical_freestart, free_pages, free_pages); 740 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 741 #endif 742 LEDSTEP(); 743 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 744 setttb(kernel_l1pt.pv_pa); 745 cpu_tlb_flushID(); 746 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 747 748 /* 749 * Moved from cpu_startup() as data_abort_handler() references 750 * this during uvm init 751 */ 752 proc0paddr = (struct user *)kernelstack.pv_va; 753 lwp0.l_addr = proc0paddr; 754 755 #ifdef VERBOSE_INIT_ARM 756 printf("done!\n"); 757 #endif 758 759 LEDSTEP(); 760 #ifdef VERBOSE_INIT_ARM 761 printf("bootstrap done.\n"); 762 #endif 763 764 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 765 766 /* 767 * Pages were allocated during the secondary bootstrap for the 768 * stacks for different CPU modes. 769 * We must now set the r13 registers in the different CPU modes to 770 * point to these stacks. 771 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 772 * of the stack memory. 773 */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("init subsystems: stacks "); 776 #endif 777 778 set_stackptr(PSR_IRQ32_MODE, 779 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 780 set_stackptr(PSR_ABT32_MODE, 781 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 782 set_stackptr(PSR_UND32_MODE, 783 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 784 785 LEDSTEP(); 786 787 /* 788 * Well we should set a data abort handler. 789 * Once things get going this will change as we will need a proper 790 * handler. 791 * Until then we will use a handler that just panics but tells us 792 * why. 793 * Initialisation of the vectors will just panic on a data abort. 794 * This just fills in a slighly better one. 795 */ 796 #ifdef VERBOSE_INIT_ARM 797 printf("vectors "); 798 #endif 799 data_abort_handler_address = (u_int)data_abort_handler; 800 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 801 undefined_handler_address = (u_int)undefinedinstruction_bounce; 802 803 /* Initialise the undefined instruction handlers */ 804 #ifdef VERBOSE_INIT_ARM 805 printf("undefined "); 806 #endif 807 undefined_init(); 808 809 LEDSTEP(); 810 811 /* Load memory into UVM. */ 812 #ifdef VERBOSE_INIT_ARM 813 printf("page "); 814 #endif 815 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 816 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 817 atop(physical_freestart), atop(physical_freeend), 818 VM_FREELIST_DEFAULT); 819 820 LEDSTEP(); 821 /* Boot strap pmap telling it where the kernel page table is */ 822 #ifdef VERBOSE_INIT_ARM 823 printf("pmap "); 824 #endif 825 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 826 KERNEL_VM_BASE + KERNEL_VM_SIZE); 827 828 LEDSTEP(); 829 830 /* Setup the IRQ system */ 831 #ifdef VERBOSE_INIT_ARM 832 printf("irq "); 833 #endif 834 /* XXX irq_init(); */ 835 836 #ifdef VERBOSE_INIT_ARM 837 printf("done.\n"); 838 #endif 839 840 #ifdef BOOTHOWTO 841 boothowto |= BOOTHOWTO; 842 #endif 843 { 844 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 845 846 if (gpio & (1<<0)) /* SW1 (EINT0) */ 847 boothowto ^= RB_SINGLE; 848 if (gpio & (1<<2)) /* SW2 (EINT2) */ 849 boothowto ^= RB_KDB; 850 #ifdef VERBOSE_INIT_ARM 851 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 852 #endif 853 } 854 855 #ifdef IPKDB 856 /* Initialise ipkdb */ 857 ipkdb_init(); 858 if (boothowto & RB_KDB) 859 ipkdb_connect(0); 860 #endif 861 862 #ifdef KGDB 863 if (boothowto & RB_KDB) { 864 kgdb_debug_init = 1; 865 kgdb_connect(1); 866 } 867 #endif 868 869 #if NKSYMS || defined(DDB) || defined(LKM) 870 /* Firmware doesn't load symbols. */ 871 ksyms_init(0, NULL, NULL); 872 #endif 873 874 #ifdef DDB 875 db_machine_init(); 876 if (boothowto & RB_KDB) 877 Debugger(); 878 #endif 879 880 /* We return the new stack pointer address */ 881 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 882 } 883 884 void 885 consinit(void) 886 { 887 static int consinit_done = 0; 888 bus_space_tag_t iot = s3c2xx0_softc->sc_iot; 889 int pclk = s3c2xx0_softc->sc_pclk; 890 891 if (consinit_done != 0) 892 return; 893 894 consinit_done = 1; 895 896 #if NSSCOM > 0 897 #ifdef SSCOM0CONSOLE 898 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 899 pclk, comcnmode)) 900 return; 901 #endif 902 #ifdef SSCOM1CONSOLE 903 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 904 pclk, comcnmode)) 905 return; 906 #endif 907 #endif /* NSSCOM */ 908 #if NCOM>0 && defined(CONCOMADDR) 909 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 910 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 911 panic("can't init serial console @%x", CONCOMADDR); 912 return; 913 #endif 914 915 consinit_done = 0; 916 } 917 918 919 #ifdef KGDB 920 921 #if (NSSCOM > 0) 922 923 #ifdef KGDB_DEVNAME 924 const char kgdb_devname[] = KGDB_DEVNAME; 925 #else 926 const char kgdb_devname[] = ""; 927 #endif 928 929 #ifndef KGDB_DEVMODE 930 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 931 #endif 932 int kgdb_sscom_mode = KGDB_DEVMODE; 933 934 #endif /* NSSCOM */ 935 936 void 937 kgdb_port_init(void) 938 { 939 #if (NSSCOM > 0) 940 int unit = -1; 941 int pclk = s3c2xx0_softc->sc_pclk; 942 943 if (strcmp(kgdb_devname, "sscom0") == 0) 944 unit = 0; 945 else if (strcmp(kgdb_devname, "sscom1") == 0) 946 unit = 1; 947 948 if (unit >= 0) { 949 s3c2800_sscom_kgdb_attach(s3c2xx0_softc->sc_iot, 950 unit, kgdb_rate, pclk, kgdb_sscom_mode); 951 } 952 #endif 953 } 954 #endif 955 956 static __inline 957 pd_entry_t * 958 read_ttb(void) 959 { 960 long ttb; 961 962 __asm __volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 963 964 965 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 966 } 967 968 969 static __inline void 970 writeback_dcache_line(vaddr_t va) 971 { 972 /* writeback Dcache line */ 973 /* we can't use cpu_dcache_wb_range() here, because cpufuncs for ARM9 974 * assume write-through cache, and always flush Dcache instead of 975 * cleaning it. Since Boot loader maps page table with write-back 976 * cached, we really need to clean Dcache. */ 977 asm("mcr p15, 0, %0, c7, c10, 1" 978 : : "r"(va)); 979 } 980 981 static __inline void 982 clean_dcache_line(vaddr_t va) 983 { 984 /* writeback and invalidate Dcache line */ 985 asm("mcr p15, 0, %0, c7, c14, 1" 986 : : "r"(va)); 987 } 988 989 static vaddr_t section_free = SMDK2410_VBASE_FREE; 990 991 /* 992 * simple memory mapping function used in early bootstrap stage 993 * before pmap is initialized. 994 * This assumes only peripheral registers to map. they are mapped to 995 * fixed address with section mapping. 996 */ 997 static int 998 bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 999 int flag, bus_space_handle_t * bshp) 1000 { 1001 long offset; 1002 int modified = 0; 1003 pd_entry_t *pagedir = read_ttb(); 1004 /* This assumes PA==VA for page directory */ 1005 1006 if (0) { 1007 } else { 1008 vaddr_t va; 1009 bus_addr_t pa; 1010 int cacheable = flag & BUS_SPACE_MAP_CACHEABLE; 1011 1012 1013 size = (size + L1_S_OFFSET) & ~L1_S_OFFSET; 1014 pa = bpa & ~L1_S_OFFSET; 1015 offset = bpa - pa; 1016 1017 va = section_free; 1018 while (size) { 1019 pmap_map_section((vaddr_t)pagedir, va, 1020 pa, VM_PROT_READ | VM_PROT_WRITE, 1021 cacheable ? PTE_CACHE : PTE_NOCACHE); 1022 writeback_dcache_line((vaddr_t)& pagedir[va >> L1_S_SHIFT]); 1023 va += L1_S_SIZE; 1024 pa += L1_S_SIZE; 1025 size -= L1_S_SIZE; 1026 } 1027 1028 *bshp = (bus_space_handle_t)(section_free + offset); 1029 section_free = va; 1030 } 1031 1032 1033 if (modified) { 1034 1035 cpu_drain_writebuf(); 1036 cpu_tlb_flushD(); 1037 } 1038 return (0); 1039 } 1040 1041 static void 1042 copy_io_area_map(pd_entry_t * new_pd) 1043 { 1044 pd_entry_t *cur_pd = read_ttb(); 1045 int sec; 1046 1047 for (sec = SMDK2410_VBASE_FREE >> L1_S_SHIFT; 1048 sec < (section_free >> L1_S_SHIFT); ++sec) { 1049 new_pd[sec] = cur_pd[sec]; 1050 writeback_dcache_line((vaddr_t)&new_pd[sec]); 1051 } 1052 cpu_drain_writebuf(); 1053 } 1054
Indexes created Thu Oct 02 01:09:59 GMT 2025