smdk2410_machdep.c revision 1.2
1 /* $NetBSD: smdk2410_machdep.c,v 1.2 2003/08/01 01:01:37 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 1.2 2003/08/01 01:01:37 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 printf("consinit done\n"); 445 446 #ifdef KGDB 447 LEDSTEP(); 448 kgdb_port_init(); 449 #endif 450 LEDSTEP(); 451 452 /* Talk to the user */ 453 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 454 455 /* 456 * Ok we have the following memory map 457 * 458 * Physical Address Range Description 459 * ----------------------- ---------------------------------- 460 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 461 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 462 * or (depend on DIPSW setting) 463 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 464 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 465 * 466 * 0x30000000 - 0x31ffffff SDRAM (32MB) 467 * 468 * The initarm() has the responsibility for creating the kernel 469 * page tables. 470 * It must also set up various memory pointers that are used 471 * by pmap etc. 472 */ 473 474 /* Fake bootconfig structure for the benefit of pmap.c */ 475 /* XXX must make the memory description h/w independent */ 476 bootconfig.dramblocks = 1; 477 bootconfig.dram[0].address = SDRAM_START; 478 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 479 480 /* 481 * Set up the variables that define the availablilty of 482 * physical memory. For now, we're going to set 483 * physical_freestart to 0x08200000 (where the kernel 484 * was loaded), and allocate the memory we need downwards. 485 * If we get too close to the bottom of SDRAM, we 486 * will panic. We will update physical_freestart and 487 * physical_freeend later to reflect what pmap_bootstrap() 488 * wants to see. 489 * 490 * XXX pmap_bootstrap() needs an enema. 491 */ 492 physical_start = bootconfig.dram[0].address; 493 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 494 495 #ifdef DO_MEMORY_DISK 496 #ifdef MEMORY_DISK_ROOT_ROM 497 md_root_start = MEMORY_DISK_ROOT_ADDR; 498 boothowto |= RB_RDONLY; 499 #else 500 /* Reserve physmem for ram disk */ 501 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 502 printf("Reserve %ld bytes for memory disk\n", 503 physical_end - md_root_start); 504 /* copy fs contents */ 505 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 506 MD_ROOT_SIZE); 507 physical_end = md_root_start; 508 #endif 509 #endif 510 511 physical_freestart = SDRAM_START; /* XXX */ 512 physical_freeend = SDRAM_START + 0x00200000; 513 514 physmem = (physical_end - physical_start) / PAGE_SIZE; 515 516 #ifdef VERBOSE_INIT_ARM 517 /* Tell the user about the memory */ 518 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 519 physical_start, physical_end - 1); 520 #endif 521 522 /* 523 * XXX 524 * Okay, the kernel starts 2MB in from the bottom of physical 525 * memory. We are going to allocate our bootstrap pages downwards 526 * from there. 527 * 528 * We need to allocate some fixed page tables to get the kernel 529 * going. We allocate one page directory and a number of page 530 * tables and store the physical addresses in the kernel_pt_table 531 * array. 532 * 533 * The kernel page directory must be on a 16K boundary. The page 534 * tables must be on 4K bounaries. What we do is allocate the 535 * page directory on the first 16K boundary that we encounter, and 536 * the page tables on 4K boundaries otherwise. Since we allocate 537 * at least 3 L2 page tables, we are guaranteed to encounter at 538 * least one 16K aligned region. 539 */ 540 541 #ifdef VERBOSE_INIT_ARM 542 printf("Allocating page tables\n"); 543 #endif 544 545 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 546 547 #ifdef VERBOSE_INIT_ARM 548 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 549 physical_freestart, free_pages, free_pages); 550 #endif 551 552 /* Define a macro to simplify memory allocation */ 553 #define valloc_pages(var, np) \ 554 alloc_pages((var).pv_pa, (np)); \ 555 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 556 557 #define alloc_pages(var, np) \ 558 physical_freeend -= ((np) * PAGE_SIZE); \ 559 if (physical_freeend < physical_freestart) \ 560 panic("initarm: out of memory"); \ 561 (var) = physical_freeend; \ 562 free_pages -= (np); \ 563 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 564 565 loop1 = 0; 566 kernel_l1pt.pv_pa = 0; 567 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 568 /* Are we 16KB aligned for an L1 ? */ 569 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 570 && kernel_l1pt.pv_pa == 0) { 571 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 572 } else { 573 valloc_pages(kernel_pt_table[loop1], 574 L2_TABLE_SIZE / PAGE_SIZE); 575 ++loop1; 576 } 577 } 578 579 /* This should never be able to happen but better confirm that. */ 580 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 581 panic("initarm: Failed to align the kernel page directory\n"); 582 583 /* 584 * Allocate a page for the system page mapped to V0x00000000 585 * This page will just contain the system vectors and can be 586 * shared by all processes. 587 */ 588 alloc_pages(systempage.pv_pa, 1); 589 590 /* Allocate stacks for all modes */ 591 valloc_pages(irqstack, IRQ_STACK_SIZE); 592 valloc_pages(abtstack, ABT_STACK_SIZE); 593 valloc_pages(undstack, UND_STACK_SIZE); 594 valloc_pages(kernelstack, UPAGES); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 598 irqstack.pv_va); 599 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 600 abtstack.pv_va); 601 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 602 undstack.pv_va); 603 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 604 kernelstack.pv_va); 605 #endif 606 607 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 608 609 LEDSTEP(); 610 611 /* 612 * Ok we have allocated physical pages for the primary kernel 613 * page tables 614 */ 615 616 #ifdef VERBOSE_INIT_ARM 617 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 618 #endif 619 620 /* 621 * Now we start construction of the L1 page table 622 * We start by mapping the L2 page tables into the L1. 623 * This means that we can replace L1 mappings later on if necessary 624 */ 625 l1pagetable = kernel_l1pt.pv_pa; 626 627 /* Map the L2 pages tables in the L1 page table */ 628 pmap_link_l2pt(l1pagetable, 0x00000000, 629 &kernel_pt_table[KERNEL_PT_SYS]); 630 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 631 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 632 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 633 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 634 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 635 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 636 637 /* update the top of the kernel VM */ 638 pmap_curmaxkvaddr = 639 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 640 641 #ifdef VERBOSE_INIT_ARM 642 printf("Mapping kernel\n"); 643 #endif 644 645 /* Now we fill in the L2 pagetable for the kernel static code/data */ 646 { 647 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 648 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 649 u_int logical; 650 651 textsize = (textsize + PGOFSET) & ~PGOFSET; 652 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 653 654 logical = 0x00200000; /* offset of kernel in RAM */ 655 656 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 657 physical_start + logical, textsize, 658 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 659 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 660 physical_start + logical, totalsize - textsize, 661 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 662 } 663 664 #ifdef VERBOSE_INIT_ARM 665 printf("Constructing L2 page tables\n"); 666 #endif 667 668 /* Map the stack pages */ 669 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 670 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 671 PTE_CACHE); 672 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 673 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 674 PTE_CACHE); 675 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 676 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 677 PTE_CACHE); 678 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 679 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 680 681 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 682 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 683 684 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 685 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 686 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 687 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 688 } 689 690 /* Map the vector page. */ 691 #if 1 692 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 693 * cache-clean code there. */ 694 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 695 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 696 #else 697 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 698 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 699 #endif 700 701 #ifdef MEMORY_DISK_DYNAMIC 702 /* map MD root image */ 703 bootstrap_bs_map(&bootstrap_bs_tag, md_root_start, MD_ROOT_SIZE, 704 BUS_SPACE_MAP_CACHEABLE | BUS_SPACE_MAP_LINEAR, 705 (bus_space_handle_t *)&md_root_start); 706 707 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 708 #endif /* MEMORY_DISK_DYNAMIC */ 709 /* 710 * map integrated peripherals at same address in l1pagetable 711 * so that we can continue to use console. 712 */ 713 copy_io_area_map((pd_entry_t *)l1pagetable); 714 715 /* 716 * Now we have the real page tables in place so we can switch to them. 717 * Once this is done we will be running with the REAL kernel page 718 * tables. 719 */ 720 721 /* 722 * Update the physical_freestart/physical_freeend/free_pages 723 * variables. 724 */ 725 { 726 physical_freestart = physical_start + 727 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 728 physical_freeend = physical_end; 729 free_pages = 730 (physical_freeend - physical_freestart) / PAGE_SIZE; 731 } 732 733 /* Switch tables */ 734 #ifdef VERBOSE_INIT_ARM 735 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 736 physical_freestart, free_pages, free_pages); 737 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 738 #endif 739 LEDSTEP(); 740 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 741 setttb(kernel_l1pt.pv_pa); 742 cpu_tlb_flushID(); 743 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 744 745 /* 746 * Moved from cpu_startup() as data_abort_handler() references 747 * this during uvm init 748 */ 749 proc0paddr = (struct user *)kernelstack.pv_va; 750 lwp0.l_addr = proc0paddr; 751 752 #ifdef VERBOSE_INIT_ARM 753 printf("done!\n"); 754 #endif 755 756 LEDSTEP(); 757 #ifdef VERBOSE_INIT_ARM 758 printf("bootstrap done.\n"); 759 #endif 760 761 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 762 763 /* 764 * Pages were allocated during the secondary bootstrap for the 765 * stacks for different CPU modes. 766 * We must now set the r13 registers in the different CPU modes to 767 * point to these stacks. 768 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 769 * of the stack memory. 770 */ 771 printf("init subsystems: stacks "); 772 773 set_stackptr(PSR_IRQ32_MODE, 774 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 775 set_stackptr(PSR_ABT32_MODE, 776 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 777 set_stackptr(PSR_UND32_MODE, 778 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 779 780 LEDSTEP(); 781 782 /* 783 * Well we should set a data abort handler. 784 * Once things get going this will change as we will need a proper 785 * handler. 786 * Until then we will use a handler that just panics but tells us 787 * why. 788 * Initialisation of the vectors will just panic on a data abort. 789 * This just fills in a slighly better one. 790 */ 791 #ifdef VERBOSE_INIT_ARM 792 printf("vectors "); 793 #endif 794 data_abort_handler_address = (u_int)data_abort_handler; 795 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 796 undefined_handler_address = (u_int)undefinedinstruction_bounce; 797 798 /* Initialise the undefined instruction handlers */ 799 printf("undefined "); 800 undefined_init(); 801 802 LEDSTEP(); 803 804 /* Load memory into UVM. */ 805 #ifdef VERBOSE_INIT_ARM 806 printf("page "); 807 #endif 808 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 809 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 810 atop(physical_freestart), atop(physical_freeend), 811 VM_FREELIST_DEFAULT); 812 813 LEDSTEP(); 814 /* Boot strap pmap telling it where the kernel page table is */ 815 #ifdef VERBOSE_INIT_ARM 816 printf("pmap "); 817 #endif 818 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 819 KERNEL_VM_BASE + KERNEL_VM_SIZE); 820 821 LEDSTEP(); 822 823 /* Setup the IRQ system */ 824 #ifdef VERBOSE_INIT_ARM 825 printf("irq "); 826 #endif 827 /* XXX irq_init(); */ 828 829 printf("done.\n"); 830 831 #ifdef BOOTHOWTO 832 boothowto |= BOOTHOWTO; 833 #endif 834 { 835 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 836 837 if (gpio & (1<<0)) /* SW1 (EINT0) */ 838 boothowto ^= RB_SINGLE; 839 if (gpio & (1<<2)) /* SW2 (EINT2) */ 840 boothowto ^= RB_KDB; 841 #ifdef VERBOSE_INIT_ARM 842 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 843 #endif 844 } 845 846 #ifdef IPKDB 847 /* Initialise ipkdb */ 848 ipkdb_init(); 849 if (boothowto & RB_KDB) 850 ipkdb_connect(0); 851 #endif 852 853 #ifdef KGDB 854 if (boothowto & RB_KDB) { 855 kgdb_debug_init = 1; 856 kgdb_connect(1); 857 } 858 #endif 859 860 #if NKSYMS || defined(DDB) || defined(LKM) 861 /* Firmware doesn't load symbols. */ 862 ksyms_init(0, NULL, NULL); 863 #endif 864 865 #ifdef DDB 866 db_machine_init(); 867 if (boothowto & RB_KDB) 868 Debugger(); 869 #endif 870 871 /* We return the new stack pointer address */ 872 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 873 } 874 875 void 876 consinit(void) 877 { 878 static int consinit_done = 0; 879 bus_space_tag_t iot = s3c2xx0_softc->sc_iot; 880 int pclk = s3c2xx0_softc->sc_pclk; 881 882 if (consinit_done != 0) 883 return; 884 885 consinit_done = 1; 886 887 #if NSSCOM > 0 888 #ifdef SSCOM0CONSOLE 889 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 890 pclk, comcnmode)) 891 return; 892 #endif 893 #ifdef SSCOM1CONSOLE 894 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 895 pclk, comcnmode)) 896 return; 897 #endif 898 #endif /* NSSCOM */ 899 #if NCOM>0 && defined(CONCOMADDR) 900 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 901 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 902 panic("can't init serial console @%x", CONCOMADDR); 903 return; 904 #endif 905 906 consinit_done = 0; 907 } 908 909 910 #ifdef KGDB 911 912 #if (NSSCOM > 0) 913 914 #ifdef KGDB_DEVNAME 915 const char kgdb_devname[] = KGDB_DEVNAME; 916 #else 917 const char kgdb_devname[] = ""; 918 #endif 919 920 #ifndef KGDB_DEVMODE 921 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 922 #endif 923 int kgdb_sscom_mode = KGDB_DEVMODE; 924 925 #endif /* NSSCOM */ 926 927 void 928 kgdb_port_init(void) 929 { 930 #if (NSSCOM > 0) 931 int unit = -1; 932 int pclk = s3c2xx0_softc->sc_pclk; 933 934 if (strcmp(kgdb_devname, "sscom0") == 0) 935 unit = 0; 936 else if (strcmp(kgdb_devname, "sscom1") == 0) 937 unit = 1; 938 939 if (unit >= 0) { 940 s3c2800_sscom_kgdb_attach(s3c2xx0_softc->sc_iot, 941 unit, kgdb_rate, pclk, kgdb_sscom_mode); 942 } 943 #endif 944 } 945 #endif 946 947 static __inline 948 pd_entry_t * 949 read_ttb(void) 950 { 951 long ttb; 952 953 __asm __volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 954 955 956 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 957 } 958 959 960 static __inline void 961 writeback_dcache_line(vaddr_t va) 962 { 963 /* writeback Dcache line */ 964 /* we can't use cpu_dcache_wb_range() here, because cpufuncs for ARM9 965 * assume write-through cache, and always flush Dcache instead of 966 * cleaning it. Since Boot loader maps page table with write-back 967 * cached, we really need to clean Dcache. */ 968 asm("mcr p15, 0, %0, c7, c10, 1" 969 : : "r"(va)); 970 } 971 972 static __inline void 973 clean_dcache_line(vaddr_t va) 974 { 975 /* writeback and invalidate Dcache line */ 976 asm("mcr p15, 0, %0, c7, c14, 1" 977 : : "r"(va)); 978 } 979 980 static vaddr_t section_free = SMDK2410_VBASE_FREE; 981 982 /* 983 * simple memory mapping function used in early bootstrap stage 984 * before pmap is initialized. 985 * This assumes only peripheral registers to map. they are mapped to 986 * fixed address with section mapping. 987 */ 988 static int 989 bootstrap_bs_map(void *t, bus_addr_t bpa, bus_size_t size, 990 int flag, bus_space_handle_t * bshp) 991 { 992 long offset; 993 int modified = 0; 994 pd_entry_t *pagedir = read_ttb(); 995 /* This assumes PA==VA for page directory */ 996 997 if (0) { 998 } else { 999 vaddr_t va; 1000 bus_addr_t pa; 1001 int cacheable = flag & BUS_SPACE_MAP_CACHEABLE; 1002 1003 1004 size = (size + L1_S_OFFSET) & ~L1_S_OFFSET; 1005 pa = bpa & ~L1_S_OFFSET; 1006 offset = bpa - pa; 1007 1008 va = section_free; 1009 while (size) { 1010 pmap_map_section((vaddr_t)pagedir, va, 1011 pa, VM_PROT_READ | VM_PROT_WRITE, 1012 cacheable ? PTE_CACHE : PTE_NOCACHE); 1013 writeback_dcache_line((vaddr_t)& pagedir[va >> L1_S_SHIFT]); 1014 va += L1_S_SIZE; 1015 pa += L1_S_SIZE; 1016 size -= L1_S_SIZE; 1017 } 1018 1019 *bshp = (bus_space_handle_t)(section_free + offset); 1020 section_free = va; 1021 } 1022 1023 1024 if (modified) { 1025 1026 cpu_drain_writebuf(); 1027 cpu_tlb_flushD(); 1028 } 1029 return (0); 1030 } 1031 1032 static void 1033 copy_io_area_map(pd_entry_t * new_pd) 1034 { 1035 pd_entry_t *cur_pd = read_ttb(); 1036 int sec; 1037 1038 for (sec = SMDK2410_VBASE_FREE >> L1_S_SHIFT; 1039 sec < (section_free >> L1_S_SHIFT); ++sec) { 1040 new_pd[sec] = cur_pd[sec]; 1041 writeback_dcache_line((vaddr_t)&new_pd[sec]); 1042 } 1043 cpu_drain_writebuf(); 1044 } 1045
Indexes created Thu Oct 02 01:09:59 GMT 2025