smdk2410_machdep.c revision 1.43
1 /* $NetBSD: smdk2410_machdep.c,v 1.43 2020/04/18 10:55:46 skrll 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 1.43 2020/04/18 10:55:46 skrll Exp $"); 109 110 #include "opt_arm_debug.h" 111 #include "opt_console.h" 112 #include "opt_ddb.h" 113 #include "opt_kgdb.h" 114 #include "opt_pmap_debug.h" 115 #include "opt_md.h" 116 117 #include <sys/param.h> 118 #include <sys/device.h> 119 #include <sys/systm.h> 120 #include <sys/kernel.h> 121 #include <sys/exec.h> 122 #include <sys/proc.h> 123 #include <sys/msgbuf.h> 124 #include <sys/reboot.h> 125 #include <sys/termios.h> 126 #include <sys/ksyms.h> 127 #include <sys/bus.h> 128 #include <sys/cpu.h> 129 #include <sys/intr.h> 130 131 #include <uvm/uvm_extern.h> 132 133 #include <dev/cons.h> 134 #include <dev/md.h> 135 136 #include <machine/db_machdep.h> 137 #include <ddb/db_sym.h> 138 #include <ddb/db_extern.h> 139 #ifdef KGDB 140 #include <sys/kgdb.h> 141 #endif 142 143 #include <machine/bootconfig.h> 144 #include <arm/locore.h> 145 #include <arm/undefined.h> 146 147 #include <arm/arm32/machdep.h> 148 149 #include <arm/s3c2xx0/s3c2410reg.h> 150 #include <arm/s3c2xx0/s3c2410var.h> 151 152 #include "ksyms.h" 153 154 #ifndef SDRAM_START 155 #define SDRAM_START S3C2410_SDRAM_START 156 #endif 157 #ifndef SDRAM_SIZE 158 #define SDRAM_SIZE (32*1024*1024) 159 #endif 160 161 /* 162 * Address to map I/O registers in early initialize stage. 163 */ 164 #define SMDK2410_IO_VBASE 0xfd000000 165 166 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 167 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 168 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 169 170 /* 171 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 172 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 173 */ 174 #define KERNEL_VM_SIZE 0x0C000000 175 176 /* Memory disk support */ 177 #if defined(MEMORY_DISK_DYNAMIC) && defined(MEMORY_DISK_ROOT_ADDR) 178 #define DO_MEMORY_DISK 179 /* We have memory disk image outside of the kernel on ROM. */ 180 #ifdef MEMORY_DISK_ROOT_ROM 181 /* map the image directory and use read-only */ 182 #else 183 /* copy the image to RAM */ 184 #endif 185 #endif 186 187 BootConfig bootconfig; /* Boot config storage */ 188 char *boot_args = NULL; 189 char *boot_file = NULL; 190 191 vaddr_t physical_start; 192 vaddr_t physical_freestart; 193 vaddr_t physical_freeend; 194 vaddr_t physical_end; 195 u_int free_pages; 196 197 /*int debug_flags;*/ 198 #ifndef PMAP_STATIC_L1S 199 int max_processes = 64; /* Default number */ 200 #endif /* !PMAP_STATIC_L1S */ 201 202 paddr_t msgbufphys; 203 204 #ifdef PMAP_DEBUG 205 extern int pmap_debug_level; 206 #endif 207 208 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 209 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 210 #define KERNEL_PT_KERNEL_NUM 2 /* L2 tables for mapping kernel VM */ 211 212 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 213 214 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 215 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 216 217 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 218 219 /* Prototypes */ 220 221 void consinit(void); 222 void kgdb_port_init(void); 223 224 225 #include "com.h" 226 #if NCOM > 0 227 #include <dev/ic/comreg.h> 228 #include <dev/ic/comvar.h> 229 #endif 230 231 #include "sscom.h" 232 #if NSSCOM > 0 233 #include "opt_sscom.h" 234 #include <arm/s3c2xx0/sscom_var.h> 235 #endif 236 237 /* 238 * Define the default console speed for the board. This is generally 239 * what the firmware provided with the board defaults to. 240 */ 241 #ifndef CONSPEED 242 #define CONSPEED B115200 /* TTYDEF_SPEED */ 243 #endif 244 #ifndef CONMODE 245 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 246 #endif 247 248 int comcnspeed = CONSPEED; 249 int comcnmode = CONMODE; 250 251 252 /* 253 * void cpu_reboot(int howto, char *bootstr) 254 * 255 * Reboots the system 256 * 257 * Deal with any syncing, unmounting, dumping and shutdown hooks, 258 * then reset the CPU. 259 */ 260 void 261 cpu_reboot(int howto, char *bootstr) 262 { 263 #ifdef DIAGNOSTIC 264 /* info */ 265 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 266 #endif 267 268 cpu_reset_address_paddr = vtophys((u_int)s3c2410_softreset); 269 270 /* 271 * If we are still cold then hit the air brakes 272 * and crash to earth fast 273 */ 274 if (cold) { 275 doshutdownhooks(); 276 pmf_system_shutdown(boothowto); 277 printf("The operating system has halted.\n"); 278 printf("Please press any key to reboot.\n\n"); 279 cngetc(); 280 printf("rebooting...\n"); 281 cpu_reset(); 282 /* NOTREACHED */ 283 } 284 /* Disable console buffering */ 285 286 /* 287 * If RB_NOSYNC was not specified sync the discs. 288 * Note: Unless cold is set to 1 here, syslogd will die during the 289 * unmount. It looks like syslogd is getting woken up only to find 290 * that it cannot page part of the binary in as the filesystem has 291 * been unmounted. 292 */ 293 if (!(howto & RB_NOSYNC)) 294 bootsync(); 295 296 /* Say NO to interrupts */ 297 splhigh(); 298 299 /* Do a dump if requested. */ 300 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 301 dumpsys(); 302 303 /* Run any shutdown hooks */ 304 doshutdownhooks(); 305 306 pmf_system_shutdown(boothowto); 307 308 /* Make sure IRQ's are disabled */ 309 IRQdisable; 310 311 if (howto & RB_HALT) { 312 printf("The operating system has halted.\n"); 313 printf("Please press any key to reboot.\n\n"); 314 cngetc(); 315 } 316 printf("rebooting...\n"); 317 cpu_reset(); 318 /* NOTREACHED */ 319 } 320 321 /* 322 * Static device mappings. These peripheral registers are mapped at 323 * fixed virtual addresses very early in initarm() so that we can use 324 * them while booting the kernel , and stay at the same address 325 * throughout whole kernel's life time. 326 * 327 * We use this table twice; once with bootstrap page table, and once 328 * with kernel's page table which we build up in initarm(). 329 * 330 * Since we map these registers into the bootstrap page table using 331 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 332 * registers segment-aligned and segment-rounded in order to avoid 333 * using the 2nd page tables. 334 */ 335 336 #define _A(a) ((a) & ~L1_S_OFFSET) 337 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 338 339 #define _V(n) (SMDK2410_IO_VBASE + (n) * L1_S_SIZE) 340 341 #define GPIO_VBASE _V(0) 342 #define INTCTL_VBASE _V(1) 343 #define CLKMAN_VBASE _V(2) 344 #define UART_VBASE _V(3) 345 #ifdef MEMORY_DISK_DYNAMIC 346 #define MEMORY_DISK_VADDR _V(4) 347 #endif 348 349 static const struct pmap_devmap smdk2410_devmap[] = { 350 /* GPIO registers */ 351 { 352 GPIO_VBASE, 353 _A(S3C2410_GPIO_BASE), 354 _S(S3C2410_GPIO_SIZE), 355 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 356 }, 357 { 358 INTCTL_VBASE, 359 _A(S3C2410_INTCTL_BASE), 360 _S(S3C2410_INTCTL_SIZE), 361 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 362 }, 363 { 364 CLKMAN_VBASE, 365 _A(S3C2410_CLKMAN_BASE), 366 _S(S3C24X0_CLKMAN_SIZE), 367 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 368 }, 369 { /* UART registers for UART0, 1, 2. */ 370 UART_VBASE, 371 _A(S3C2410_UART0_BASE), 372 _S(S3C2410_UART_BASE(3) - S3C2410_UART0_BASE), 373 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 374 }, 375 376 { 0, 0, 0, 0 } 377 }; 378 379 #undef _A 380 #undef _S 381 382 static inline pd_entry_t * 383 read_ttb(void) 384 { 385 long ttb; 386 387 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb)); 388 389 390 return (pd_entry_t *)(ttb & ~((1 << 14) - 1)); 391 } 392 393 394 #define ioreg_read8(a) (*(volatile uint8_t *)(a)) 395 #define ioreg_write8(a,v) (*(volatile uint8_t *)(a)=(v)) 396 #define ioreg_read32(a) (*(volatile uint32_t *)(a)) 397 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v)) 398 399 /* 400 * vaddr_t initarm(...) 401 * 402 * Initial entry point on startup. This gets called before main() is 403 * entered. 404 * It should be responsible for setting up everything that must be 405 * in place when main is called. 406 * This includes 407 * Taking a copy of the boot configuration structure. 408 * Initialising the physical console so characters can be printed. 409 * Setting up page tables for the kernel 410 * Relocating the kernel to the bottom of physical memory 411 */ 412 413 vaddr_t 414 initarm(void *arg) 415 { 416 int loop; 417 int loop1; 418 u_int l1pagetable; 419 extern int etext __asm("_etext"); 420 extern int end __asm("_end"); 421 int progress_counter = 0; 422 423 #ifdef DO_MEMORY_DISK 424 vaddr_t md_root_start; 425 #define MD_ROOT_SIZE (MEMORY_DISK_ROOT_SIZE * DEV_BSIZE) 426 #endif 427 428 #define gpio_read8(reg) ioreg_read8(GPIO_VBASE + (reg)) 429 430 #define LEDSTEP() __LED(progress_counter++) 431 432 #define pdatf (*(volatile uint8_t *)(S3C2410_GPIO_BASE+GPIO_PFDAT)) 433 #define __LED(x) (pdatf = (pdatf & ~0xf0) | (~(x) & 0xf0)) 434 435 LEDSTEP(); 436 437 /* CS8900A on CS3 and CL-PD7610 need nBE1 signal. make sure 438 * memory controller is set correctly. (USB download firmware 439 * doesn't do this right) Also, we use WAIT signal for them. 440 */ 441 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON, 442 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(2) | 443 (BWSCON_ST|BWSCON_WS) << BWSCON_BANK_SHIFT(3) | 444 ioreg_read32(S3C2410_MEMCTL_BASE + MEMCTL_BWSCON)); 445 /* tweak access timing for CS8900A */ 446 ioreg_write32(S3C2410_MEMCTL_BASE + MEMCTL_BANKCON(3), 447 (0<<BANKCON_TACS_SHIFT)|(1<<BANKCON_TCOS_SHIFT)| 448 (7<<BANKCON_TACC_SHIFT)|(0<<BANKCON_TOCH_SHIFT)| 449 (0<<BANKCON_TCAH_SHIFT)); 450 451 /* 452 * Heads up ... Setup the CPU / MMU / TLB functions 453 */ 454 if (set_cpufuncs()) 455 panic("cpu not recognized!"); 456 457 LEDSTEP(); 458 459 /* 460 * Map I/O registers that are used in startup. Now we are 461 * still using page table prepared by bootloader. Later we'll 462 * map those registers at the same address in the kernel page 463 * table. 464 */ 465 pmap_devmap_bootstrap((vaddr_t)read_ttb(), smdk2410_devmap); 466 467 #undef pdatf 468 #define pdatf (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PFDAT)) 469 470 471 LEDSTEP(); 472 473 /* Disable all peripheral interrupts */ 474 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0); 475 476 /* initialize some variables so that splfoo() doesn't 477 touch illegal address. */ 478 s3c2xx0_intr_bootstrap(INTCTL_VBASE); 479 480 consinit(); 481 #ifdef VERBOSE_INIT_ARM 482 printf("consinit done\n"); 483 #endif 484 485 #ifdef KGDB 486 LEDSTEP(); 487 kgdb_port_init(); 488 #endif 489 LEDSTEP(); 490 491 #ifdef VERBOSE_INIT_ARM 492 /* Talk to the user */ 493 printf("\nNetBSD/evbarm (SMDK2410) booting ...\n"); 494 #endif 495 /* 496 * Ok we have the following memory map 497 * 498 * Physical Address Range Description 499 * ----------------------- ---------------------------------- 500 * 0x00000000 - 0x00ffffff Intel flash Memory (16MB) 501 * 0x02000000 - 0x020fffff AMD flash Memory (1MB) 502 * or (depend on DIPSW setting) 503 * 0x00000000 - 0x000fffff AMD flash Memory (1MB) 504 * 0x02000000 - 0x02ffffff Intel flash Memory (16MB) 505 * 506 * 0x30000000 - 0x31ffffff SDRAM (32MB) 507 * 508 * The initarm() has the responsibility for creating the kernel 509 * page tables. 510 * It must also set up various memory pointers that are used 511 * by pmap etc. 512 */ 513 514 /* Fake bootconfig structure for the benefit of pmap.c */ 515 /* XXX must make the memory description h/w independent */ 516 bootconfig.dramblocks = 1; 517 bootconfig.dram[0].address = SDRAM_START; 518 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE; 519 520 /* 521 * Set up the variables that define the availablilty of 522 * physical memory. For now, we're going to set 523 * physical_freestart to 0x08200000 (where the kernel 524 * was loaded), and allocate the memory we need downwards. 525 * If we get too close to the bottom of SDRAM, we 526 * will panic. We will update physical_freestart and 527 * physical_freeend later to reflect what pmap_bootstrap() 528 * wants to see. 529 * 530 * XXX pmap_bootstrap() needs an enema. 531 */ 532 physical_start = bootconfig.dram[0].address; 533 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 534 535 #ifdef DO_MEMORY_DISK 536 #ifdef MEMORY_DISK_ROOT_ROM 537 md_root_start = MEMORY_DISK_ROOT_ADDR; 538 boothowto |= RB_RDONLY; 539 #else 540 /* Reserve physmem for ram disk */ 541 md_root_start = ((physical_end - MD_ROOT_SIZE) & ~(L1_S_SIZE-1)); 542 printf("Reserve %ld bytes for memory disk\n", 543 physical_end - md_root_start); 544 /* copy fs contents */ 545 memcpy((void *)md_root_start, (void *)MEMORY_DISK_ROOT_ADDR, 546 MD_ROOT_SIZE); 547 physical_end = md_root_start; 548 #endif 549 #endif 550 551 physical_freestart = SDRAM_START; /* XXX */ 552 physical_freeend = SDRAM_START + 0x00200000; 553 554 physmem = (physical_end - physical_start) / PAGE_SIZE; 555 556 #ifdef VERBOSE_INIT_ARM 557 /* Tell the user about the memory */ 558 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 559 physical_start, physical_end - 1); 560 #endif 561 562 /* 563 * XXX 564 * Okay, the kernel starts 2MB in from the bottom of physical 565 * memory. We are going to allocate our bootstrap pages downwards 566 * from there. 567 * 568 * We need to allocate some fixed page tables to get the kernel 569 * going. We allocate one page directory and a number of page 570 * tables and store the physical addresses in the kernel_pt_table 571 * array. 572 * 573 * The kernel page directory must be on a 16K boundary. The page 574 * tables must be on 4K boundaries. What we do is allocate the 575 * page directory on the first 16K boundary that we encounter, and 576 * the page tables on 4K boundaries otherwise. Since we allocate 577 * at least 3 L2 page tables, we are guaranteed to encounter at 578 * least one 16K aligned region. 579 */ 580 581 #ifdef VERBOSE_INIT_ARM 582 printf("Allocating page tables\n"); 583 #endif 584 585 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 586 587 #ifdef VERBOSE_INIT_ARM 588 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 589 physical_freestart, free_pages, free_pages); 590 #endif 591 592 /* Define a macro to simplify memory allocation */ 593 #define valloc_pages(var, np) \ 594 alloc_pages((var).pv_pa, (np)); \ 595 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 596 597 #define alloc_pages(var, np) \ 598 physical_freeend -= ((np) * PAGE_SIZE); \ 599 if (physical_freeend < physical_freestart) \ 600 panic("initarm: out of memory"); \ 601 (var) = physical_freeend; \ 602 free_pages -= (np); \ 603 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 604 605 loop1 = 0; 606 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 607 /* Are we 16KB aligned for an L1 ? */ 608 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 609 && kernel_l1pt.pv_pa == 0) { 610 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 611 } else { 612 valloc_pages(kernel_pt_table[loop1], 613 L2_TABLE_SIZE / PAGE_SIZE); 614 ++loop1; 615 } 616 } 617 618 /* This should never be able to happen but better confirm that. */ 619 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0) 620 panic("initarm: Failed to align the kernel page directory\n"); 621 622 /* 623 * Allocate a page for the system page mapped to V0x00000000 624 * This page will just contain the system vectors and can be 625 * shared by all processes. 626 */ 627 alloc_pages(systempage.pv_pa, 1); 628 629 /* Allocate stacks for all modes */ 630 valloc_pages(irqstack, IRQ_STACK_SIZE); 631 valloc_pages(abtstack, ABT_STACK_SIZE); 632 valloc_pages(undstack, UND_STACK_SIZE); 633 valloc_pages(kernelstack, UPAGES); 634 635 #ifdef VERBOSE_INIT_ARM 636 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 637 irqstack.pv_va); 638 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 639 abtstack.pv_va); 640 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 641 undstack.pv_va); 642 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 643 kernelstack.pv_va); 644 #endif 645 646 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 647 648 LEDSTEP(); 649 650 /* 651 * Ok we have allocated physical pages for the primary kernel 652 * page tables 653 */ 654 655 #ifdef VERBOSE_INIT_ARM 656 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 657 #endif 658 659 /* 660 * Now we start construction of the L1 page table 661 * We start by mapping the L2 page tables into the L1. 662 * This means that we can replace L1 mappings later on if necessary 663 */ 664 l1pagetable = kernel_l1pt.pv_pa; 665 666 /* Map the L2 pages tables in the L1 page table */ 667 pmap_link_l2pt(l1pagetable, 0x00000000, 668 &kernel_pt_table[KERNEL_PT_SYS]); 669 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 670 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 671 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 672 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 673 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 674 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 675 676 /* update the top of the kernel VM */ 677 pmap_curmaxkvaddr = 678 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 679 680 #ifdef VERBOSE_INIT_ARM 681 printf("Mapping kernel\n"); 682 #endif 683 684 /* Now we fill in the L2 pagetable for the kernel static code/data */ 685 { 686 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE; 687 size_t totalsize = (uintptr_t)&end - KERNEL_TEXT_BASE; 688 u_int logical; 689 690 textsize = (textsize + PGOFSET) & ~PGOFSET; 691 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 692 693 logical = 0x00200000; /* offset of kernel in RAM */ 694 695 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 696 physical_start + logical, textsize, 697 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 698 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 699 physical_start + logical, totalsize - textsize, 700 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 701 } 702 703 #ifdef VERBOSE_INIT_ARM 704 printf("Constructing L2 page tables\n"); 705 #endif 706 707 /* Map the stack pages */ 708 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 709 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 710 PTE_CACHE); 711 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 712 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 713 PTE_CACHE); 714 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 715 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, 716 PTE_CACHE); 717 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 718 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 719 720 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 721 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 722 723 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 724 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 725 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 726 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 727 } 728 729 /* Map the vector page. */ 730 #if 1 731 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 732 * cache-clean code there. */ 733 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 734 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE); 735 #else 736 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 737 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 738 #endif 739 740 #ifdef MEMORY_DISK_DYNAMIC 741 /* map MD root image */ 742 pmap_map_chunk(l1pagetable, MEMORY_DISK_VADDR, md_root_start, 743 MD_ROOT_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 744 745 md_root_setconf((void *)md_root_start, MD_ROOT_SIZE); 746 #endif /* MEMORY_DISK_DYNAMIC */ 747 /* 748 * map integrated peripherals at same address in l1pagetable 749 * so that we can continue to use console. 750 */ 751 pmap_devmap_bootstrap(l1pagetable, smdk2410_devmap); 752 753 /* 754 * Now we have the real page tables in place so we can switch to them. 755 * Once this is done we will be running with the REAL kernel page 756 * tables. 757 */ 758 759 /* 760 * Update the physical_freestart/physical_freeend/free_pages 761 * variables. 762 */ 763 { 764 physical_freestart = physical_start + 765 (((((uintptr_t)&end) + PGOFSET) & ~PGOFSET) - KERNEL_BASE); 766 physical_freeend = physical_end; 767 free_pages = 768 (physical_freeend - physical_freestart) / PAGE_SIZE; 769 } 770 771 /* Switch tables */ 772 #ifdef VERBOSE_INIT_ARM 773 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 774 physical_freestart, free_pages, free_pages); 775 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 776 #endif 777 LEDSTEP(); 778 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 779 cpu_setttb(kernel_l1pt.pv_pa, true); 780 cpu_tlb_flushID(); 781 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 782 783 /* 784 * Moved from cpu_startup() as data_abort_handler() references 785 * this during uvm init 786 */ 787 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 788 789 #ifdef VERBOSE_INIT_ARM 790 printf("done!\n"); 791 #endif 792 793 LEDSTEP(); 794 #ifdef VERBOSE_INIT_ARM 795 printf("bootstrap done.\n"); 796 #endif 797 798 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 799 800 /* 801 * Pages were allocated during the secondary bootstrap for the 802 * stacks for different CPU modes. 803 * We must now set the r13 registers in the different CPU modes to 804 * point to these stacks. 805 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 806 * of the stack memory. 807 */ 808 #ifdef VERBOSE_INIT_ARM 809 printf("init subsystems: stacks "); 810 #endif 811 812 set_stackptr(PSR_IRQ32_MODE, 813 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 814 set_stackptr(PSR_ABT32_MODE, 815 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 816 set_stackptr(PSR_UND32_MODE, 817 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 818 819 LEDSTEP(); 820 821 /* 822 * Well we should set a data abort handler. 823 * Once things get going this will change as we will need a proper 824 * handler. 825 * Until then we will use a handler that just panics but tells us 826 * why. 827 * Initialisation of the vectors will just panic on a data abort. 828 * This just fills in a slightly better one. 829 */ 830 #ifdef VERBOSE_INIT_ARM 831 printf("vectors "); 832 #endif 833 data_abort_handler_address = (u_int)data_abort_handler; 834 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 835 undefined_handler_address = (u_int)undefinedinstruction_bounce; 836 837 /* Initialise the undefined instruction handlers */ 838 #ifdef VERBOSE_INIT_ARM 839 printf("undefined "); 840 #endif 841 undefined_init(); 842 843 LEDSTEP(); 844 845 /* Load memory into UVM. */ 846 #ifdef VERBOSE_INIT_ARM 847 printf("page "); 848 #endif 849 uvm_md_init(); 850 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 851 atop(physical_freestart), atop(physical_freeend), 852 VM_FREELIST_DEFAULT); 853 854 LEDSTEP(); 855 /* Boot strap pmap telling it where managed kernel virtual memory is */ 856 #ifdef VERBOSE_INIT_ARM 857 printf("pmap "); 858 #endif 859 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 860 861 LEDSTEP(); 862 863 /* Setup the IRQ system */ 864 #ifdef VERBOSE_INIT_ARM 865 printf("irq "); 866 #endif 867 /* XXX irq_init(); */ 868 869 #ifdef VERBOSE_INIT_ARM 870 printf("done.\n"); 871 #endif 872 873 #ifdef BOOTHOWTO 874 boothowto |= BOOTHOWTO; 875 #endif 876 { 877 uint8_t gpio = ~gpio_read8(GPIO_PFDAT); 878 879 if (gpio & (1<<0)) /* SW1 (EINT0) */ 880 boothowto ^= RB_SINGLE; 881 if (gpio & (1<<2)) /* SW2 (EINT2) */ 882 boothowto ^= RB_KDB; 883 #ifdef VERBOSE_INIT_ARM 884 printf( "sw: %x boothowto: %x\n", gpio, boothowto ); 885 #endif 886 } 887 888 #ifdef KGDB 889 if (boothowto & RB_KDB) { 890 kgdb_debug_init = 1; 891 kgdb_connect(1); 892 } 893 #endif 894 895 #ifdef DDB 896 db_machine_init(); 897 if (boothowto & RB_KDB) 898 Debugger(); 899 #endif 900 901 /* We return the new stack pointer address */ 902 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 903 } 904 905 void 906 consinit(void) 907 { 908 static int consinit_done = 0; 909 bus_space_tag_t iot = &s3c2xx0_bs_tag; 910 int pclk; 911 912 if (consinit_done != 0) 913 return; 914 915 consinit_done = 1; 916 917 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 918 919 #if NSSCOM > 0 920 #ifdef SSCOM0CONSOLE 921 if (0 == s3c2410_sscom_cnattach(iot, 0, comcnspeed, 922 pclk, comcnmode)) 923 return; 924 #endif 925 #ifdef SSCOM1CONSOLE 926 if (0 == s3c2410_sscom_cnattach(iot, 1, comcnspeed, 927 pclk, comcnmode)) 928 return; 929 #endif 930 #endif /* NSSCOM */ 931 #if NCOM>0 && defined(CONCOMADDR) 932 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed, 933 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 934 panic("can't init serial console @%x", CONCOMADDR); 935 return; 936 #endif 937 938 consinit_done = 0; 939 } 940 941 942 #ifdef KGDB 943 944 #if (NSSCOM > 0) 945 946 #ifdef KGDB_DEVNAME 947 const char kgdb_devname[] = KGDB_DEVNAME; 948 #else 949 const char kgdb_devname[] = ""; 950 #endif 951 952 #ifndef KGDB_DEVMODE 953 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */ 954 #endif 955 int kgdb_sscom_mode = KGDB_DEVMODE; 956 957 #endif /* NSSCOM */ 958 959 void 960 kgdb_port_init(void) 961 { 962 #if (NSSCOM > 0) 963 int unit = -1; 964 int pclk; 965 966 if (strcmp(kgdb_devname, "sscom0") == 0) 967 unit = 0; 968 else if (strcmp(kgdb_devname, "sscom1") == 0) 969 unit = 1; 970 971 if (unit >= 0) { 972 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk); 973 974 s3c2410_sscom_kgdb_attach(&s3c2xx0_bs_tag, 975 unit, kgdb_rate, pclk, kgdb_sscom_mode); 976 } 977 #endif 978 } 979 #endif 980 981 static struct arm32_dma_range smdk2410_dma_ranges[1]; 982 983 bus_dma_tag_t 984 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template) 985 { 986 extern paddr_t physical_start, physical_end; 987 struct arm32_bus_dma_tag *dmat; 988 989 smdk2410_dma_ranges[0].dr_sysbase = physical_start; 990 smdk2410_dma_ranges[0].dr_busbase = physical_start; 991 smdk2410_dma_ranges[0].dr_len = physical_end - physical_start; 992 993 #if 1 994 dmat = dma_tag_template; 995 #else 996 dmat = malloc(sizeof *dmat, M_DEVBUF, M_WAITOK); 997 *dmat = *dma_tag_template; 998 #endif 999 1000 dmat->_ranges = smdk2410_dma_ranges; 1001 dmat->_nranges = 1; 1002 1003 return dmat; 1004 } 1005
Indexes created Thu Oct 02 01:09:59 GMT 2025