1 /* $NetBSD: smdk2410_machdep.c,v 1.34 2014/02/27 22:57:22 joerg 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 dependent functions for kernel setup for integrator board 98 * 99 * Created : 24/11/97 100 */ 101 102 /* 103 * Machine dependent 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 1.34 2014/02/27 22:57:22 joerg 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 #include <sys/bus.h> 126 #include <sys/cpu.h> 127 #include <sys/intr.h> 128 129 #include <uvm/uvm_extern.h> 130 131 #include <dev/cons.h> 132 #include <dev/md.h> 133 134 #include <machine/db_machdep.h> 135 #include <ddb/db_sym.h> 136 #include <ddb/db_extern.h> 137 #ifdef KGDB 138 #include <sys/kgdb.h> 139 #endif 140 141 #include <machine/bootconfig.h> 142 #include <arm/locore.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 BootConfig bootconfig; /* Boot config storage */ 186 char *boot_args = NULL; 187 char *boot_file = NULL; 188 189 vm_offset_t physical_start; 190 vm_offset_t physical_freestart; 191 vm_offset_t physical_freeend; 192 vm_offset_t physical_end; 193 u_int free_pages; 194 195 /*int debug_flags;*/ 196 #ifndef PMAP_STATIC_L1S 197 int max_processes = 64; /* Default number */ 198 #endif /* !PMAP_STATIC_L1S */ 199 200 vm_offset_t msgbufphys; 201 202 #ifdef PMAP_DEBUG 203 extern int pmap_debug_level; 204 #endif 205 206 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 207 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 208 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 209 210 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 211 212 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 213 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 214 215 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 216 217 /* Prototypes */ 218 219 void consinit(void); 220 void kgdb_port_init(void); 221 222 223 #include "com.h" 224 #if NCOM > 0 225 #include <dev/ic/comreg.h> 226 #include <dev/ic/comvar.h> 227 #endif 228 229 #include "sscom.h" 230 #if NSSCOM > 0 231 #include "opt_sscom.h" 232 #include <arm/s3c2xx0/sscom_var.h> 233 #endif 234 235 /* 236 * Define the default console speed for the board. This is generally 237 * what the firmware provided with the board defaults to. 238 */ 239 #ifndef CONSPEED 240 #define CONSPEED B115200 /* TTYDEF_SPEED */ 241 #endif 242 #ifndef CONMODE 243 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 244 #endif 245 246 int comcnspeed = CONSPEED; 247 int comcnmode = CONMODE; 248 249 250 /* 251 * void cpu_reboot(int howto, char *bootstr) 252 * 253 * Reboots the system 254 * 255 * Deal with any syncing, unmounting, dumping and shutdown hooks, 256 * then reset the CPU. 257 */ 258 void 259 cpu_reboot(int howto, char *bootstr) 260 { 261 #ifdef DIAGNOSTIC 262 /* info */ 263 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 264 #endif 265 266 cpu_reset_address_paddr = vtophys((u_int)s3c2410_softreset); 267 268 /* 269 * If we are still cold then hit the air brakes 270 * and crash to earth fast 271 */ 272 if (cold) { 273 doshutdownhooks(); 274 pmf_system_shutdown(boothowto); 275 printf("The operating system has halted.\n"); 276 printf("Please press any key to reboot.\n\n"); 277 cngetc(); 278 printf("rebooting...\n"); 279 cpu_reset(); 280 /* NOTREACHED */ 281 } 282 /* Disable console buffering */ 283 284 /* 285 * If RB_NOSYNC was not specified sync the discs. 286 * Note: Unless cold is set to 1 here, syslogd will die during the 287 * unmount. It looks like syslogd is getting woken up only to find 288 * that it cannot page part of the binary in as the filesystem has 289 * been unmounted. 290 */ 291 if (!(howto & RB_NOSYNC)) 292 bootsync(); 293 294 /* Say NO to interrupts */ 295 splhigh(); 296 297 /* Do a dump if requested. */ 298 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 299 dumpsys(); 300 301 /* Run any shutdown hooks */ 302 doshutdownhooks(); 303 304 pmf_system_shutdown(boothowto); 305 306 /* Make sure IRQ's are disabled */ 307 IRQdisable; 308 309 if (howto & RB_HALT) { 310 printf("The operating system has halted.\n"); 311 printf("Please press any key to reboot.\n\n"); 312 cngetc(); 313 } 314 printf("rebooting...\n"); 315 cpu_reset(); 316 /* NOTREACHED */ 317 } 318 319 /* 320 * Static device mappings. These peripheral registers are mapped at 321 * fixed virtual addresses very early in initarm() so that we can use 322 * them while booting the kernel , and stay at the same address 323 * throughout whole kernel's life time. 324 * 325 * We use this table twice; once with bootstrap page table, and once 326 * with kernel's page table which we build up in initarm(). 327 * 328 * Since we map these registers into the bootstrap page table using 329 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 330 * registers segment-aligned and segment-rounded in order to avoid 331 * using the 2nd page tables. 332 */ 333 334 #define _A(a) ((a) & ~L1_S_OFFSET) 335 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 336 337 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 338 339 #define GPIO_VBASE _V(0) 340 #define INTCTL_VBASE _V(1) 341 #define CLKMAN_VBASE _V(2) 342 #define UART_VBASE _V(3) 343 #ifdef MEMORY_DISK_DYNAMIC 344 #define MEMORY_DISK_VADDR _V(4) 345 #endif 346 347 static const struct pmap_devmap smdk2410_devmap[] = { 348 /* GPIO registers */ 349 { 350 GPIO_VBASE, 351 _A(S3C2410_GPIO_BASE), 352 _S(S3C2410_GPIO_SIZE), 353 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 354 }, 355 { 356 INTCTL_VBASE, 357 _A(S3C2410_INTCTL_BASE), 358 _S(S3C2410_INTCTL_SIZE), 359 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 360 }, 361 { 362 CLKMAN_VBASE, 363 _A(S3C2410_CLKMAN_BASE), 364 _S(S3C24X0_CLKMAN_SIZE), 365 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 366 }, 367 { /* UART registers for UART0, 1, 2. */ 368 UART_VBASE, 369 _A(S3C2410_UART0_BASE), 370 _S(S3C2410_UART_BASE(3) - S3C2410_UART0_BASE), 371 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 372 }, 373 374 { 0, 0, 0, 0 } 375 }; 376 377 #undef _A 378 #undef _S 379 380 static inline pd_entry_t * 381 read_ttb(void) 382 { 383 long ttb; 384 385 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 386 387 388 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 389 } 390 391 392 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 393 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 394 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 395 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 396 397 /* 398 * u_int initarm(...) 399 * 400 * Initial entry point on startup. This gets called before main() is 401 * entered. 402 * It should be responsible for setting up everything that must be 403 * in place when main is called. 404 * This includes 405 * Taking a copy of the boot configuration structure. 406 * Initialising the physical console so characters can be printed. 407 * Setting up page tables for the kernel 408 * Relocating the kernel to the bottom of physical memory 409 */ 410 411 u_int 412 initarm(void *arg) 413 { 414 int loop; 415 int loop1; 416 u_int l1pagetable; 417 extern int etext __asm("_etext"); 418 extern int end __asm("_end"); 419 int progress_counter = 0; 420 421 #ifdef DO_MEMORY_DISK 422 vm_offset_t md_root_start; 423 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 424 #endif 425 426 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 427 428 #define LEDSTEP() __LED(progress_counter++) 429 430 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 431 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 432 433 LEDSTEP(); 434 435 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 436 * memory controller is set correctly. (USB download firmware 437 * doesn't do this right) Also, we use WAIT signal for them. 438 */ 439 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 440 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 441 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 442 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 443 /* tweak access timing for CS8900A */ 444 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 445 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 446 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 447 (0<<BANKCON_TCAH_SHIFT)); 448 449 /* 450 * Heads up ... Setup the CPU / MMU / TLB functions 451 */ 452 if (set_cpufuncs()) 453 panic("cpu not recognized!"); 454 455 LEDSTEP(); 456 457 /* 458 * Map I/O registers that are used in startup. Now we are 459 * still using page table prepared by bootloader. Later we'll 460 * map those registers at the same address in the kernel page 461 * table. 462 */ 463 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 464 465 #undef pdatf 466 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 467 468 469 LEDSTEP(); 470 471 /* Disable all peripheral interrupts */ 472 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 473 474 /* initialize some variables so that splfoo() doesn't 475 touch illegal address. */ 476 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 477 478 consinit(); 479 #ifdef VERBOSE_INIT_ARM 480 printf("consinit done\n"); 481 #endif 482 483 #ifdef KGDB 484 LEDSTEP(); 485 kgdb_port_init(); 486 #endif 487 LEDSTEP(); 488 489 #ifdef VERBOSE_INIT_ARM 490 /* Talk to the user */ 491 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 492 #endif 493 /* 494 * Ok we have the following memory map 495 * 496 * Physical Address Range Description 497 * ----------------------- ---------------------------------- 498 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 499 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 500 * or (depend on DIPSW setting) 501 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 502 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 503 * 504 * 0x30000000 - 0x31ffffff SDRAM (32MB) 505 * 506 * The initarm() has the responsibility for creating the kernel 507 * page tables. 508 * It must also set up various memory pointers that are used 509 * by pmap etc. 510 */ 511 512 /* Fake bootconfig structure for the benefit of pmap.c */ 513 /* XXX must make the memory description h/w independent */ 514 bootconfig.dramblocks = 1; 515 bootconfig.dram[0].address = SDRAM_START; 516 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 517 518 /* 519 * Set up the variables that define the availablilty of 520 * physical memory. For now, we're going to set 521 * physical_freestart to 0x08200000 (where the kernel 522 * was loaded), and allocate the memory we need downwards. 523 * If we get too close to the bottom of SDRAM, we 524 * will panic. We will update physical_freestart and 525 * physical_freeend later to reflect what pmap_bootstrap() 526 * wants to see. 527 * 528 * XXX pmap_bootstrap() needs an enema. 529 */ 530 physical_start = bootconfig.dram[0].address; 531 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 532 533 #ifdef DO_MEMORY_DISK 534 #ifdef MEMORY_DISK_ROOT_ROM 535 md_root_start = MEMORY_DISK_ROOT_ADDR; 536 boothowto |= RB_RDONLY; 537 #else 538 /* Reserve physmem for ram disk */ 539 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 540 printf("Reserve %ld bytes for memory disk\n", 541 physical_end - md_root_start); 542 /* copy fs contents */ 543 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 544 MD_ROOT_SIZE); 545 physical_end = md_root_start; 546 #endif 547 #endif 548 549 physical_freestart = SDRAM_START; /* XXX */ 550 physical_freeend = SDRAM_START + 0x00200000; 551 552 physmem = (physical_end - physical_start) / PAGE_SIZE; 553 554 #ifdef VERBOSE_INIT_ARM 555 /* Tell the user about the memory */ 556 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 557 physical_start, physical_end - 1); 558 #endif 559 560 /* 561 * XXX 562 * Okay, the kernel starts 2MB in from the bottom of physical 563 * memory. We are going to allocate our bootstrap pages downwards 564 * from there. 565 * 566 * We need to allocate some fixed page tables to get the kernel 567 * going. We allocate one page directory and a number of page 568 * tables and store the physical addresses in the kernel_pt_table 569 * array. 570 * 571 * The kernel page directory must be on a 16K boundary. The page 572 * tables must be on 4K boundaries. What we do is allocate the 573 * page directory on the first 16K boundary that we encounter, and 574 * the page tables on 4K boundaries otherwise. Since we allocate 575 * at least 3 L2 page tables, we are guaranteed to encounter at 576 * least one 16K aligned region. 577 */ 578 579 #ifdef VERBOSE_INIT_ARM 580 printf("Allocating page tables\n"); 581 #endif 582 583 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 584 585 #ifdef VERBOSE_INIT_ARM 586 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 587 physical_freestart, free_pages, free_pages); 588 #endif 589 590 /* Define a macro to simplify memory allocation */ 591 #define valloc_pages(var, np) \ 592 alloc_pages((var).pv_pa, (np)); \ 593 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 594 595 #define alloc_pages(var, np) \ 596 physical_freeend -= ((np) * PAGE_SIZE); \ 597 if (physical_freeend < physical_freestart) \ 598 panic("initarm: out of memory"); \ 599 (var) = physical_freeend; \ 600 free_pages -= (np); \ 601 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 602 603 loop1 = 0; 604 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 605 /* Are we 16KB aligned for an L1 ? */ 606 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 607 && kernel_l1pt.pv_pa == 0) { 608 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 609 } else { 610 valloc_pages(kernel_pt_table[loop1], 611 L2_TABLE_SIZE / PAGE_SIZE); 612 ++loop1; 613 } 614 } 615 616 /* This should never be able to happen but better confirm that. */ 617 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 618 panic("initarm: Failed to align the kernel page directory\n"); 619 620 /* 621 * Allocate a page for the system page mapped to V0x00000000 622 * This page will just contain the system vectors and can be 623 * shared by all processes. 624 */ 625 alloc_pages(systempage.pv_pa, 1); 626 627 /* Allocate stacks for all modes */ 628 valloc_pages(irqstack, IRQ_STACK_SIZE); 629 valloc_pages(abtstack, ABT_STACK_SIZE); 630 valloc_pages(undstack, UND_STACK_SIZE); 631 valloc_pages(kernelstack, UPAGES); 632 633 #ifdef VERBOSE_INIT_ARM 634 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 635 irqstack.pv_va); 636 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 637 abtstack.pv_va); 638 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 639 undstack.pv_va); 640 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 641 kernelstack.pv_va); 642 #endif 643 644 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 645 646 LEDSTEP(); 647 648 /* 649 * Ok we have allocated physical pages for the primary kernel 650 * page tables 651 */ 652 653 #ifdef VERBOSE_INIT_ARM 654 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 655 #endif 656 657 /* 658 * Now we start construction of the L1 page table 659 * We start by mapping the L2 page tables into the L1. 660 * This means that we can replace L1 mappings later on if necessary 661 */ 662 l1pagetable = kernel_l1pt.pv_pa; 663 664 /* Map the L2 pages tables in the L1 page table */ 665 pmap_link_l2pt(l1pagetable, 0x00000000, 666 &kernel_pt_table[KERNEL_PT_SYS]); 667 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 668 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 669 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 670 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 671 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 672 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 673 674 /* update the top of the kernel VM */ 675 pmap_curmaxkvaddr = 676 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 677 678 #ifdef VERBOSE_INIT_ARM 679 printf("Mapping kernel\n"); 680 #endif 681 682 /* Now we fill in the L2 pagetable for the kernel static code/data */ 683 { 684 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 685 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 686 u_int logical; 687 688 textsize = (textsize + PGOFSET) & ~PGOFSET; 689 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 690 691 logical = 0x00200000; /* offset of kernel in RAM */ 692 693 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 694 physical_start + logical, textsize, 695 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 696 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 697 physical_start + logical, totalsize - textsize, 698 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 699 } 700 701 #ifdef VERBOSE_INIT_ARM 702 printf("Constructing L2 page tables\n"); 703 #endif 704 705 /* Map the stack pages */ 706 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 707 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 708 PTE_CACHE); 709 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 710 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 711 PTE_CACHE); 712 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 713 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 714 PTE_CACHE); 715 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 716 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 717 718 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 719 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 720 721 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 722 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 723 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 724 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 725 } 726 727 /* Map the vector page. */ 728 #if 1 729 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 730 * cache-clean code there. */ 731 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 732 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 733 #else 734 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 735 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 736 #endif 737 738 #ifdef MEMORY_DISK_DYNAMIC 739 /* map MD root image */ 740 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 741 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 742 743 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 744 #endif /* MEMORY_DISK_DYNAMIC */ 745 /* 746 * map integrated peripherals at same address in l1pagetable 747 * so that we can continue to use console. 748 */ 749 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 750 751 /* 752 * Now we have the real page tables in place so we can switch to them. 753 * Once this is done we will be running with the REAL kernel page 754 * tables. 755 */ 756 757 /* 758 * Update the physical_freestart/physical_freeend/free_pages 759 * variables. 760 */ 761 { 762 physical_freestart = physical_start + 763 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 764 physical_freeend = physical_end; 765 free_pages = 766 (physical_freeend - physical_freestart) / PAGE_SIZE; 767 } 768 769 /* Switch tables */ 770 #ifdef VERBOSE_INIT_ARM 771 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 772 physical_freestart, free_pages, free_pages); 773 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 774 #endif 775 LEDSTEP(); 776 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 777 cpu_setttb(kernel_l1pt.pv_pa, true); 778 cpu_tlb_flushID(); 779 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 780 781 /* 782 * Moved from cpu_startup() as data_abort_handler() references 783 * this during uvm init 784 */ 785 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 786 787 #ifdef VERBOSE_INIT_ARM 788 printf("done!\n"); 789 #endif 790 791 LEDSTEP(); 792 #ifdef VERBOSE_INIT_ARM 793 printf("bootstrap done.\n"); 794 #endif 795 796 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 797 798 /* 799 * Pages were allocated during the secondary bootstrap for the 800 * stacks for different CPU modes. 801 * We must now set the r13 registers in the different CPU modes to 802 * point to these stacks. 803 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 804 * of the stack memory. 805 */ 806 #ifdef VERBOSE_INIT_ARM 807 printf("init subsystems: stacks "); 808 #endif 809 810 set_stackptr(PSR_IRQ32_MODE, 811 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 812 set_stackptr(PSR_ABT32_MODE, 813 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 814 set_stackptr(PSR_UND32_MODE, 815 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 816 817 LEDSTEP(); 818 819 /* 820 * Well we should set a data abort handler. 821 * Once things get going this will change as we will need a proper 822 * handler. 823 * Until then we will use a handler that just panics but tells us 824 * why. 825 * Initialisation of the vectors will just panic on a data abort. 826 * This just fills in a slightly better one. 827 */ 828 #ifdef VERBOSE_INIT_ARM 829 printf("vectors "); 830 #endif 831 data_abort_handler_address = (u_int)data_abort_handler; 832 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 833 undefined_handler_address = (u_int)undefinedinstruction_bounce; 834 835 /* Initialise the undefined instruction handlers */ 836 #ifdef VERBOSE_INIT_ARM 837 printf("undefined "); 838 #endif 839 undefined_init(); 840 841 LEDSTEP(); 842 843 /* Load memory into UVM. */ 844 #ifdef VERBOSE_INIT_ARM 845 printf("page "); 846 #endif 847 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 848 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 849 atop(physical_freestart), atop(physical_freeend), 850 VM_FREELIST_DEFAULT); 851 852 LEDSTEP(); 853 /* Boot strap pmap telling it where the kernel page table is */ 854 #ifdef VERBOSE_INIT_ARM 855 printf("pmap "); 856 #endif 857 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 858 859 LEDSTEP(); 860 861 /* Setup the IRQ system */ 862 #ifdef VERBOSE_INIT_ARM 863 printf("irq "); 864 #endif 865 /* XXX irq_init(); */ 866 867 #ifdef VERBOSE_INIT_ARM 868 printf("done.\n"); 869 #endif 870 871 #ifdef BOOTHOWTO 872 boothowto |= BOOTHOWTO; 873 #endif 874 { 875 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 876 877 if (gpio & (1<<0)) /* SW1 (EINT0) */ 878 boothowto ^= RB_SINGLE; 879 if (gpio & (1<<2)) /* SW2 (EINT2) */ 880 boothowto ^= RB_KDB; 881 #ifdef VERBOSE_INIT_ARM 882 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 883 #endif 884 } 885 886 #ifdef KGDB 887 if (boothowto & RB_KDB) { 888 kgdb_debug_init = 1; 889 kgdb_connect(1); 890 } 891 #endif 892 893 #ifdef DDB 894 db_machine_init(); 895 if (boothowto & RB_KDB) 896 Debugger(); 897 #endif 898 899 /* We return the new stack pointer address */ 900 return (kernelstack.pv_va + USPACE_SVC_STACK_TOP); 901 } 902 903 void 904 consinit(void) 905 { 906 static int consinit_done = 0; 907 bus_space_tag_t iot = &s3c2xx0_bs_tag; 908 int pclk; 909 910 if (consinit_done != 0) 911 return; 912 913 consinit_done = 1; 914 915 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 916 917 #if NSSCOM > 0 918 #ifdef SSCOM0CONSOLE 919 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 920 pclk, comcnmode)) 921 return; 922 #endif 923 #ifdef SSCOM1CONSOLE 924 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 925 pclk, comcnmode)) 926 return; 927 #endif 928 #endif /* NSSCOM */ 929 #if NCOM>0 && defined(CONCOMADDR) 930 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 931 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 932 panic("can't init serial console @%x", CONCOMADDR); 933 return; 934 #endif 935 936 consinit_done = 0; 937 } 938 939 940 #ifdef KGDB 941 942 #if (NSSCOM > 0) 943 944 #ifdef KGDB_DEVNAME 945 const char kgdb_devname[] = KGDB_DEVNAME; 946 #else 947 const char kgdb_devname[] = ""; 948 #endif 949 950 #ifndef KGDB_DEVMODE 951 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 952 #endif 953 int kgdb_sscom_mode = KGDB_DEVMODE; 954 955 #endif /* NSSCOM */ 956 957 void 958 kgdb_port_init(void) 959 { 960 #if (NSSCOM > 0) 961 int unit = -1; 962 int pclk; 963 964 if (strcmp(kgdb_devname, "sscom0") == 0) 965 unit = 0; 966 else if (strcmp(kgdb_devname, "sscom1") == 0) 967 unit = 1; 968 969 if (unit >= 0) { 970 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 971 972 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 973 unit, kgdb_rate, pclk, kgdb_sscom_mode); 974 } 975 #endif 976 } 977 #endif 978 979 static struct arm32_dma_range smdk2410_dma_ranges[1]; 980 981 bus_dma_tag_t 982 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 983 { 984 extern paddr_t physical_start, physical_end; 985 struct arm32_bus_dma_tag *dmat; 986 987 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 988 smdk2410_dma_ranges[0].dr_busbase = physical_start; 989 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 990 991 #if 1 992 dmat = dma_tag_template; 993 #else 994 dmat = malloc(sizeof *dmat, M_DEVBUF, M_NOWAIT); 995 if (dmat == NULL) 996 return NULL; 997 *dmat = *dma_tag_template; 998 #endif 999 1000 dmat->_ranges = smdk2410_dma_ranges; 1001 dmat->_nranges = 1; 1002 1003 return dmat; 1004 } 1005