1 /* $NetBSD: smdk2410_machdep.c,v 1.27 2009/12/26 16:01:25 uebayasi Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 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 * 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 1.27 2009/12/26 16:01:25 uebayasi Exp $"); 109 110 #include "opt_ddb.h" 111 #include "opt_kgdb.h" 112 #include "opt_pmap_debug.h" 113 #include "opt_md.h" 114 115 #include <sys/param.h> 116 #include <sys/device.h> 117 #include <sys/systm.h> 118 #include <sys/kernel.h> 119 #include <sys/exec.h> 120 #include <sys/proc.h> 121 #include <sys/msgbuf.h> 122 #include <sys/reboot.h> 123 #include <sys/termios.h> 124 #include <sys/ksyms.h> 125 126 #include <uvm/uvm_extern.h> 127 128 #include <dev/cons.h> 129 #include <dev/md.h> 130 131 #include <machine/db_machdep.h> 132 #include <ddb/db_sym.h> 133 #include <ddb/db_extern.h> 134 #ifdef KGDB 135 #include <sys/kgdb.h> 136 #endif 137 138 #include <machine/bootconfig.h> 139 #include <machine/bus.h> 140 #include <machine/cpu.h> 141 #include <machine/frame.h> 142 #include <machine/intr.h> 143 #include <arm/undefined.h> 144 145 #include <arm/arm32/machdep.h> 146 147 #include <arm/s3c2xx0/s3c2410reg.h> 148 #include <arm/s3c2xx0/s3c2410var.h> 149 150 #include "ksyms.h" 151 152 #ifndef SDRAM_START 153 #define SDRAM_START S3C2410_SDRAM_START 154 #endif 155 #ifndef SDRAM_SIZE 156 #define SDRAM_SIZE (32*1024*1024) 157 #endif 158 159 /* 160 * Address to map I/O registers in early initialize stage. 161 */ 162 #define SMDK2410_IO_VBASE 0xfd000000 163 164 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 165 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 166 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 167 168 /* 169 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 170 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 171 */ 172 #define KERNEL_VM_SIZE 0x0C000000 173 174 /* Memory disk support */ 175 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 176 #define DO_MEMORY_DISK 177 /* We have memory disk image outside of the kernel on ROM. */ 178 #ifdef MEMORY_DISK_ROOT_ROM 179 /* map the image directory and use read-only */ 180 #else 181 /* copy the image to RAM */ 182 #endif 183 #endif 184 185 186 /* 187 * Address to call from cpu_reset() to reset the machine. 188 * This is machine architecture dependant as it varies depending 189 * on where the ROM appears when you turn the MMU off. 190 */ 191 u_int cpu_reset_address = (u_int)0; 192 193 /* Define various stack sizes in pages */ 194 #define IRQ_STACK_SIZE 1 195 #define ABT_STACK_SIZE 1 196 #define UND_STACK_SIZE 1 197 198 BootConfig bootconfig; /* Boot config storage */ 199 char *boot_args = NULL; 200 char *boot_file = NULL; 201 202 vm_offset_t physical_start; 203 vm_offset_t physical_freestart; 204 vm_offset_t physical_freeend; 205 vm_offset_t physical_end; 206 u_int free_pages; 207 208 /*int debug_flags;*/ 209 #ifndef PMAP_STATIC_L1S 210 int max_processes = 64; /* Default number */ 211 #endif /* !PMAP_STATIC_L1S */ 212 213 /* Physical and virtual addresses for some global pages */ 214 pv_addr_t irqstack; 215 pv_addr_t undstack; 216 pv_addr_t abtstack; 217 pv_addr_t kernelstack; 218 219 vm_offset_t msgbufphys; 220 221 extern u_int data_abort_handler_address; 222 extern u_int prefetch_abort_handler_address; 223 extern u_int undefined_handler_address; 224 225 #ifdef PMAP_DEBUG 226 extern int pmap_debug_level; 227 #endif 228 229 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 230 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 231 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 232 233 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 234 235 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 236 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 237 238 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 239 240 /* Prototypes */ 241 242 void consinit(void); 243 void kgdb_port_init(void); 244 245 246 #include "com.h" 247 #if NCOM > 0 248 #include <dev/ic/comreg.h> 249 #include <dev/ic/comvar.h> 250 #endif 251 252 #include "sscom.h" 253 #if NSSCOM > 0 254 #include "opt_sscom.h" 255 #include <arm/s3c2xx0/sscom_var.h> 256 #endif 257 258 /* 259 * Define the default console speed for the board. This is generally 260 * what the firmware provided with the board defaults to. 261 */ 262 #ifndef CONSPEED 263 #define CONSPEED B115200 /* TTYDEF_SPEED */ 264 #endif 265 #ifndef CONMODE 266 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 267 #endif 268 269 int comcnspeed = CONSPEED; 270 int comcnmode = CONMODE; 271 272 273 /* 274 * void cpu_reboot(int howto, char *bootstr) 275 * 276 * Reboots the system 277 * 278 * Deal with any syncing, unmounting, dumping and shutdown hooks, 279 * then reset the CPU. 280 */ 281 void 282 cpu_reboot(int howto, char *bootstr) 283 { 284 #ifdef DIAGNOSTIC 285 /* info */ 286 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 287 #endif 288 289 cpu_reset_address = vtophys((u_int)s3c2410_softreset); 290 291 /* 292 * If we are still cold then hit the air brakes 293 * and crash to earth fast 294 */ 295 if (cold) { 296 doshutdownhooks(); 297 pmf_system_shutdown(boothowto); 298 printf("The operating system has halted.\n"); 299 printf("Please press any key to reboot.\n\n"); 300 cngetc(); 301 printf("rebooting...\n"); 302 cpu_reset(); 303 /* NOTREACHED */ 304 } 305 /* Disable console buffering */ 306 307 /* 308 * If RB_NOSYNC was not specified sync the discs. 309 * Note: Unless cold is set to 1 here, syslogd will die during the 310 * unmount. It looks like syslogd is getting woken up only to find 311 * that it cannot page part of the binary in as the filesystem has 312 * been unmounted. 313 */ 314 if (!(howto & RB_NOSYNC)) 315 bootsync(); 316 317 /* Say NO to interrupts */ 318 splhigh(); 319 320 /* Do a dump if requested. */ 321 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 322 dumpsys(); 323 324 /* Run any shutdown hooks */ 325 doshutdownhooks(); 326 327 pmf_system_shutdown(boothowto); 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 * Static device mappings. These peripheral registers are mapped at 344 * fixed virtual addresses very early in initarm() so that we can use 345 * them while booting the kernel , and stay at the same address 346 * throughout whole kernel's life time. 347 * 348 * We use this table twice; once with bootstrap page table, and once 349 * with kernel's page table which we build up in initarm(). 350 * 351 * Since we map these registers into the bootstrap page table using 352 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 353 * registers segment-aligned and segment-rounded in order to avoid 354 * using the 2nd page tables. 355 */ 356 357 #define _A(a) ((a) & ~L1_S_OFFSET) 358 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 359 360 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 361 362 #define GPIO_VBASE _V(0) 363 #define INTCTL_VBASE _V(1) 364 #define CLKMAN_VBASE _V(2) 365 #define UART_VBASE _V(3) 366 #ifdef MEMORY_DISK_DYNAMIC 367 #define MEMORY_DISK_VADDR _V(4) 368 #endif 369 370 static const struct pmap_devmap smdk2410_devmap[] = { 371 /* GPIO registers */ 372 { 373 GPIO_VBASE, 374 _A(S3C2410_GPIO_BASE), 375 _S(S3C2410_GPIO_SIZE), 376 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 377 }, 378 { 379 INTCTL_VBASE, 380 _A(S3C2410_INTCTL_BASE), 381 _S(S3C2410_INTCTL_SIZE), 382 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 383 }, 384 { 385 CLKMAN_VBASE, 386 _A(S3C2410_CLKMAN_BASE), 387 _S(S3C24X0_CLKMAN_SIZE), 388 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 389 }, 390 { /* UART registers for UART0, 1, 2. */ 391 UART_VBASE, 392 _A(S3C2410_UART0_BASE), 393 _S(S3C2410_UART_BASE(3) - S3C2410_UART0_BASE), 394 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 395 }, 396 397 { 0, 0, 0, 0 } 398 }; 399 400 #undef _A 401 #undef _S 402 403 static inline pd_entry_t * 404 read_ttb(void) 405 { 406 long ttb; 407 408 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 409 410 411 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 412 } 413 414 415 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 416 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 417 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 418 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 419 420 /* 421 * u_int initarm(...) 422 * 423 * Initial entry point on startup. This gets called before main() is 424 * entered. 425 * It should be responsible for setting up everything that must be 426 * in place when main is called. 427 * This includes 428 * Taking a copy of the boot configuration structure. 429 * Initialising the physical console so characters can be printed. 430 * Setting up page tables for the kernel 431 * Relocating the kernel to the bottom of physical memory 432 */ 433 434 u_int 435 initarm(void *arg) 436 { 437 int loop; 438 int loop1; 439 u_int l1pagetable; 440 extern int etext __asm("_etext"); 441 extern int end __asm("_end"); 442 int progress_counter = 0; 443 444 #ifdef DO_MEMORY_DISK 445 vm_offset_t md_root_start; 446 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 447 #endif 448 449 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 450 451 #define LEDSTEP() __LED(progress_counter++) 452 453 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 454 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 455 456 LEDSTEP(); 457 458 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 459 * memory controller is set correctly. (USB download firmware 460 * doesn't do this right) Also, we use WAIT signal for them. 461 */ 462 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 463 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 464 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 465 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 466 /* tweak access timing for CS8900A */ 467 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 468 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 469 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 470 (0<<BANKCON_TCAH_SHIFT)); 471 472 /* 473 * Heads up ... Setup the CPU / MMU / TLB functions 474 */ 475 if (set_cpufuncs()) 476 panic("cpu not recognized!"); 477 478 LEDSTEP(); 479 480 /* 481 * Map I/O registers that are used in startup. Now we are 482 * still using page table prepared by bootloader. Later we'll 483 * map those registers at the same address in the kernel page 484 * table. 485 */ 486 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 487 488 #undef pdatf 489 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 490 491 492 LEDSTEP(); 493 494 /* Disable all peripheral interrupts */ 495 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 496 497 /* initialize some variables so that splfoo() doesn't 498 touch illegal address. */ 499 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 500 501 consinit(); 502 #ifdef VERBOSE_INIT_ARM 503 printf("consinit done\n"); 504 #endif 505 506 #ifdef KGDB 507 LEDSTEP(); 508 kgdb_port_init(); 509 #endif 510 LEDSTEP(); 511 512 #ifdef VERBOSE_INIT_ARM 513 /* Talk to the user */ 514 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 515 #endif 516 /* 517 * Ok we have the following memory map 518 * 519 * Physical Address Range Description 520 * ----------------------- ---------------------------------- 521 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 522 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 523 * or (depend on DIPSW setting) 524 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 525 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 526 * 527 * 0x30000000 - 0x31ffffff SDRAM (32MB) 528 * 529 * The initarm() has the responsibility for creating the kernel 530 * page tables. 531 * It must also set up various memory pointers that are used 532 * by pmap etc. 533 */ 534 535 /* Fake bootconfig structure for the benefit of pmap.c */ 536 /* XXX must make the memory description h/w independent */ 537 bootconfig.dramblocks = 1; 538 bootconfig.dram[0].address = SDRAM_START; 539 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 540 541 /* 542 * Set up the variables that define the availablilty of 543 * physical memory. For now, we're going to set 544 * physical_freestart to 0x08200000 (where the kernel 545 * was loaded), and allocate the memory we need downwards. 546 * If we get too close to the bottom of SDRAM, we 547 * will panic. We will update physical_freestart and 548 * physical_freeend later to reflect what pmap_bootstrap() 549 * wants to see. 550 * 551 * XXX pmap_bootstrap() needs an enema. 552 */ 553 physical_start = bootconfig.dram[0].address; 554 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 555 556 #ifdef DO_MEMORY_DISK 557 #ifdef MEMORY_DISK_ROOT_ROM 558 md_root_start = MEMORY_DISK_ROOT_ADDR; 559 boothowto |= RB_RDONLY; 560 #else 561 /* Reserve physmem for ram disk */ 562 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 563 printf("Reserve %ld bytes for memory disk\n", 564 physical_end - md_root_start); 565 /* copy fs contents */ 566 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 567 MD_ROOT_SIZE); 568 physical_end = md_root_start; 569 #endif 570 #endif 571 572 physical_freestart = SDRAM_START; /* XXX */ 573 physical_freeend = SDRAM_START + 0x00200000; 574 575 physmem = (physical_end - physical_start) / PAGE_SIZE; 576 577 #ifdef VERBOSE_INIT_ARM 578 /* Tell the user about the memory */ 579 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 580 physical_start, physical_end - 1); 581 #endif 582 583 /* 584 * XXX 585 * Okay, the kernel starts 2MB in from the bottom of physical 586 * memory. We are going to allocate our bootstrap pages downwards 587 * from there. 588 * 589 * We need to allocate some fixed page tables to get the kernel 590 * going. We allocate one page directory and a number of page 591 * tables and store the physical addresses in the kernel_pt_table 592 * array. 593 * 594 * The kernel page directory must be on a 16K boundary. The page 595 * tables must be on 4K boundaries. What we do is allocate the 596 * page directory on the first 16K boundary that we encounter, and 597 * the page tables on 4K boundaries otherwise. Since we allocate 598 * at least 3 L2 page tables, we are guaranteed to encounter at 599 * least one 16K aligned region. 600 */ 601 602 #ifdef VERBOSE_INIT_ARM 603 printf("Allocating page tables\n"); 604 #endif 605 606 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 607 608 #ifdef VERBOSE_INIT_ARM 609 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 610 physical_freestart, free_pages, free_pages); 611 #endif 612 613 /* Define a macro to simplify memory allocation */ 614 #define valloc_pages(var, np) \ 615 alloc_pages((var).pv_pa, (np)); \ 616 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 617 618 #define alloc_pages(var, np) \ 619 physical_freeend -= ((np) * PAGE_SIZE); \ 620 if (physical_freeend < physical_freestart) \ 621 panic("initarm: out of memory"); \ 622 (var) = physical_freeend; \ 623 free_pages -= (np); \ 624 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 625 626 loop1 = 0; 627 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 628 /* Are we 16KB aligned for an L1 ? */ 629 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 630 && kernel_l1pt.pv_pa == 0) { 631 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 632 } else { 633 valloc_pages(kernel_pt_table[loop1], 634 L2_TABLE_SIZE / PAGE_SIZE); 635 ++loop1; 636 } 637 } 638 639 /* This should never be able to happen but better confirm that. */ 640 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 641 panic("initarm: Failed to align the kernel page directory\n"); 642 643 /* 644 * Allocate a page for the system page mapped to V0x00000000 645 * This page will just contain the system vectors and can be 646 * shared by all processes. 647 */ 648 alloc_pages(systempage.pv_pa, 1); 649 650 /* Allocate stacks for all modes */ 651 valloc_pages(irqstack, IRQ_STACK_SIZE); 652 valloc_pages(abtstack, ABT_STACK_SIZE); 653 valloc_pages(undstack, UND_STACK_SIZE); 654 valloc_pages(kernelstack, UPAGES); 655 656 #ifdef VERBOSE_INIT_ARM 657 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 658 irqstack.pv_va); 659 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 660 abtstack.pv_va); 661 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 662 undstack.pv_va); 663 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 664 kernelstack.pv_va); 665 #endif 666 667 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 668 669 LEDSTEP(); 670 671 /* 672 * Ok we have allocated physical pages for the primary kernel 673 * page tables 674 */ 675 676 #ifdef VERBOSE_INIT_ARM 677 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 678 #endif 679 680 /* 681 * Now we start construction of the L1 page table 682 * We start by mapping the L2 page tables into the L1. 683 * This means that we can replace L1 mappings later on if necessary 684 */ 685 l1pagetable = kernel_l1pt.pv_pa; 686 687 /* Map the L2 pages tables in the L1 page table */ 688 pmap_link_l2pt(l1pagetable, 0x00000000, 689 &kernel_pt_table[KERNEL_PT_SYS]); 690 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 691 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 692 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 693 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 694 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 695 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 696 697 /* update the top of the kernel VM */ 698 pmap_curmaxkvaddr = 699 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 700 701 #ifdef VERBOSE_INIT_ARM 702 printf("Mapping kernel\n"); 703 #endif 704 705 /* Now we fill in the L2 pagetable for the kernel static code/data */ 706 { 707 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 708 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 709 u_int logical; 710 711 textsize = (textsize + PGOFSET) & ~PGOFSET; 712 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 713 714 logical = 0x00200000; /* offset of kernel in RAM */ 715 716 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 717 physical_start + logical, textsize, 718 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 719 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 720 physical_start + logical, totalsize - textsize, 721 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 722 } 723 724 #ifdef VERBOSE_INIT_ARM 725 printf("Constructing L2 page tables\n"); 726 #endif 727 728 /* Map the stack pages */ 729 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 730 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 731 PTE_CACHE); 732 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 733 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 734 PTE_CACHE); 735 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 736 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 737 PTE_CACHE); 738 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 739 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 740 741 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 742 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 743 744 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 745 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 746 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 747 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 748 } 749 750 /* Map the vector page. */ 751 #if 1 752 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 753 * cache-clean code there. */ 754 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 755 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 756 #else 757 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 758 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 759 #endif 760 761 #ifdef MEMORY_DISK_DYNAMIC 762 /* map MD root image */ 763 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 764 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 765 766 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 767 #endif /* MEMORY_DISK_DYNAMIC */ 768 /* 769 * map integrated peripherals at same address in l1pagetable 770 * so that we can continue to use console. 771 */ 772 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 773 774 /* 775 * Now we have the real page tables in place so we can switch to them. 776 * Once this is done we will be running with the REAL kernel page 777 * tables. 778 */ 779 780 /* 781 * Update the physical_freestart/physical_freeend/free_pages 782 * variables. 783 */ 784 { 785 physical_freestart = physical_start + 786 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 787 physical_freeend = physical_end; 788 free_pages = 789 (physical_freeend - physical_freestart) / PAGE_SIZE; 790 } 791 792 /* Switch tables */ 793 #ifdef VERBOSE_INIT_ARM 794 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 795 physical_freestart, free_pages, free_pages); 796 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 797 #endif 798 LEDSTEP(); 799 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 800 cpu_setttb(kernel_l1pt.pv_pa); 801 cpu_tlb_flushID(); 802 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 803 804 /* 805 * Moved from cpu_startup() as data_abort_handler() references 806 * this during uvm init 807 */ 808 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 809 810 #ifdef VERBOSE_INIT_ARM 811 printf("done!\n"); 812 #endif 813 814 LEDSTEP(); 815 #ifdef VERBOSE_INIT_ARM 816 printf("bootstrap done.\n"); 817 #endif 818 819 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 820 821 /* 822 * Pages were allocated during the secondary bootstrap for the 823 * stacks for different CPU modes. 824 * We must now set the r13 registers in the different CPU modes to 825 * point to these stacks. 826 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 827 * of the stack memory. 828 */ 829 #ifdef VERBOSE_INIT_ARM 830 printf("init subsystems: stacks "); 831 #endif 832 833 set_stackptr(PSR_IRQ32_MODE, 834 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 835 set_stackptr(PSR_ABT32_MODE, 836 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 837 set_stackptr(PSR_UND32_MODE, 838 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 839 840 LEDSTEP(); 841 842 /* 843 * Well we should set a data abort handler. 844 * Once things get going this will change as we will need a proper 845 * handler. 846 * Until then we will use a handler that just panics but tells us 847 * why. 848 * Initialisation of the vectors will just panic on a data abort. 849 * This just fills in a slightly better one. 850 */ 851 #ifdef VERBOSE_INIT_ARM 852 printf("vectors "); 853 #endif 854 data_abort_handler_address = (u_int)data_abort_handler; 855 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 856 undefined_handler_address = (u_int)undefinedinstruction_bounce; 857 858 /* Initialise the undefined instruction handlers */ 859 #ifdef VERBOSE_INIT_ARM 860 printf("undefined "); 861 #endif 862 undefined_init(); 863 864 LEDSTEP(); 865 866 /* Load memory into UVM. */ 867 #ifdef VERBOSE_INIT_ARM 868 printf("page "); 869 #endif 870 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 871 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 872 atop(physical_freestart), atop(physical_freeend), 873 VM_FREELIST_DEFAULT); 874 875 LEDSTEP(); 876 /* Boot strap pmap telling it where the kernel page table is */ 877 #ifdef VERBOSE_INIT_ARM 878 printf("pmap "); 879 #endif 880 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 881 882 LEDSTEP(); 883 884 /* Setup the IRQ system */ 885 #ifdef VERBOSE_INIT_ARM 886 printf("irq "); 887 #endif 888 /* XXX irq_init(); */ 889 890 #ifdef VERBOSE_INIT_ARM 891 printf("done.\n"); 892 #endif 893 894 #ifdef BOOTHOWTO 895 boothowto |= BOOTHOWTO; 896 #endif 897 { 898 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 899 900 if (gpio & (1<<0)) /* SW1 (EINT0) */ 901 boothowto ^= RB_SINGLE; 902 if (gpio & (1<<2)) /* SW2 (EINT2) */ 903 boothowto ^= RB_KDB; 904 #ifdef VERBOSE_INIT_ARM 905 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 906 #endif 907 } 908 909 #ifdef KGDB 910 if (boothowto & RB_KDB) { 911 kgdb_debug_init = 1; 912 kgdb_connect(1); 913 } 914 #endif 915 916 #ifdef DDB 917 db_machine_init(); 918 if (boothowto & RB_KDB) 919 Debugger(); 920 #endif 921 922 /* We return the new stack pointer address */ 923 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 924 } 925 926 void 927 consinit(void) 928 { 929 static int consinit_done = 0; 930 bus_space_tag_t iot = &s3c2xx0_bs_tag; 931 int pclk; 932 933 if (consinit_done != 0) 934 return; 935 936 consinit_done = 1; 937 938 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 939 940 #if NSSCOM > 0 941 #ifdef SSCOM0CONSOLE 942 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 943 pclk, comcnmode)) 944 return; 945 #endif 946 #ifdef SSCOM1CONSOLE 947 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 948 pclk, comcnmode)) 949 return; 950 #endif 951 #endif /* NSSCOM */ 952 #if NCOM>0 && defined(CONCOMADDR) 953 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 954 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 955 panic("can't init serial console @%x", CONCOMADDR); 956 return; 957 #endif 958 959 consinit_done = 0; 960 } 961 962 963 #ifdef KGDB 964 965 #if (NSSCOM > 0) 966 967 #ifdef KGDB_DEVNAME 968 const char kgdb_devname[] = KGDB_DEVNAME; 969 #else 970 const char kgdb_devname[] = ""; 971 #endif 972 973 #ifndef KGDB_DEVMODE 974 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 975 #endif 976 int kgdb_sscom_mode = KGDB_DEVMODE; 977 978 #endif /* NSSCOM */ 979 980 void 981 kgdb_port_init(void) 982 { 983 #if (NSSCOM > 0) 984 int unit = -1; 985 int pclk; 986 987 if (strcmp(kgdb_devname, "sscom0") == 0) 988 unit = 0; 989 else if (strcmp(kgdb_devname, "sscom1") == 0) 990 unit = 1; 991 992 if (unit >= 0) { 993 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 994 995 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 996 unit, kgdb_rate, pclk, kgdb_sscom_mode); 997 } 998 #endif 999 } 1000 #endif 1001 1002 static inline void 1003 writeback_dcache_line(vaddr_t va) 1004 { 1005 /* writeback Dcache line */ 1006 /* we can't use cpu_dcache_wb_range() here, because cpufuncs for ARM9 1007 * assume write-through cache, and always flush Dcache instead of 1008 * cleaning it. Since Boot loader maps page table with write-back 1009 * cached, we really need to clean Dcache. */ 1010 __asm("mcr p15, 0, %0, c7, c10, 1" 1011 : : "r"(va)); 1012 } 1013 1014 static inline void 1015 clean_dcache_line(vaddr_t va) 1016 { 1017 /* writeback and invalidate Dcache line */ 1018 __asm("mcr p15, 0, %0, c7, c14, 1" 1019 : : "r"(va)); 1020 } 1021 1022 static struct arm32_dma_range smdk2410_dma_ranges[1]; 1023 1024 bus_dma_tag_t 1025 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 1026 { 1027 extern paddr_t physical_start, physical_end; 1028 struct arm32_bus_dma_tag *dmat; 1029 1030 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 1031 smdk2410_dma_ranges[0].dr_busbase = physical_start; 1032 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 1033 1034 #if 1 1035 dmat = dma_tag_template; 1036 #else 1037 dmat = malloc(sizeof *dmat, M_DEVBUF, M_NOWAIT); 1038 if (dmat == NULL) 1039 return NULL; 1040 *dmat = *dma_tag_template; 1041 #endif 1042 1043 dmat->_ranges = smdk2410_dma_ranges; 1044 dmat->_nranges = 1; 1045 1046 return dmat; 1047 } 1048