lubbock_machdep.c revision 1.31
1 /* $NetBSD: lubbock_machdep.c,v 1.31 2012/09/22 00:33:40 matt Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec Corporation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of Genetec Corporation may not be used to endorse or 16 * promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Machine dependent functions for kernel setup for 32 * Intel DBPXA250 evaluation board (a.k.a. Lubbock). 33 * Based on iq80310_machhdep.c 34 */ 35 /* 36 * Copyright (c) 2001 Wasabi Systems, Inc. 37 * All rights reserved. 38 * 39 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed for the NetBSD Project by 52 * Wasabi Systems, Inc. 53 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 54 * or promote products derived from this software without specific prior 55 * written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 59 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 60 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 61 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 62 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 63 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 64 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 65 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 66 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 67 * POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* 71 * Copyright (c) 1997,1998 Mark Brinicombe. 72 * Copyright (c) 1997,1998 Causality Limited. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by Mark Brinicombe 86 * for the NetBSD Project. 87 * 4. The name of the company nor the name of the author may be used to 88 * endorse or promote products derived from this software without specific 89 * prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 92 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 93 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 94 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 95 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 96 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 97 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * Machine dependent functions for kernel setup for Intel IQ80310 evaluation 104 * boards using RedBoot firmware. 105 */ 106 107 /* 108 * DIP switches: 109 * 110 * S19: no-dot: set RB_KDB. enter kgdb session. 111 * S20: no-dot: set RB_SINGLE. don't go multi user mode. 112 */ 113 114 #include <sys/cdefs.h> 115 __KERNEL_RCSID(0, "$NetBSD: lubbock_machdep.c,v 1.31 2012/09/22 00:33:40 matt Exp $"); 116 117 #include "opt_ddb.h" 118 #include "opt_kgdb.h" 119 #include "opt_pmap_debug.h" 120 #include "opt_md.h" 121 #include "opt_com.h" 122 #include "lcd.h" 123 124 #include <sys/param.h> 125 #include <sys/device.h> 126 #include <sys/systm.h> 127 #include <sys/kernel.h> 128 #include <sys/exec.h> 129 #include <sys/proc.h> 130 #include <sys/msgbuf.h> 131 #include <sys/reboot.h> 132 #include <sys/termios.h> 133 #include <sys/ksyms.h> 134 135 #include <uvm/uvm_extern.h> 136 137 #include <sys/conf.h> 138 #include <dev/cons.h> 139 #include <dev/md.h> 140 #include <dev/ic/smc91cxxreg.h> 141 142 #include <machine/db_machdep.h> 143 #include <ddb/db_sym.h> 144 #include <ddb/db_extern.h> 145 #ifdef KGDB 146 #include <sys/kgdb.h> 147 #endif 148 149 #include <machine/bootconfig.h> 150 #include <sys/bus.h> 151 #include <machine/cpu.h> 152 #include <machine/frame.h> 153 #include <arm/undefined.h> 154 155 #include <arm/arm32/machdep.h> 156 157 #include <arm/xscale/pxa2x0reg.h> 158 #include <arm/xscale/pxa2x0var.h> 159 #include <arm/xscale/pxa2x0_gpio.h> 160 #include <arm/sa11x0/sa1111_reg.h> 161 #include <evbarm/lubbock/lubbock_reg.h> 162 #include <evbarm/lubbock/lubbock_var.h> 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 BootConfig bootconfig; /* Boot config storage */ 175 char *boot_args = NULL; 176 char *boot_file = NULL; 177 178 vm_offset_t physical_start; 179 vm_offset_t physical_freestart; 180 vm_offset_t physical_freeend; 181 vm_offset_t physical_end; 182 u_int free_pages; 183 184 /*int debug_flags;*/ 185 #ifndef PMAP_STATIC_L1S 186 int max_processes = 64; /* Default number */ 187 #endif /* !PMAP_STATIC_L1S */ 188 189 /* Physical and virtual addresses for some global pages */ 190 pv_addr_t minidataclean; 191 192 vm_offset_t msgbufphys; 193 194 #ifdef PMAP_DEBUG 195 extern int pmap_debug_level; 196 #endif 197 198 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 199 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 200 #define KERNEL_PT_KERNEL_NUM 4 201 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 202 /* Page tables for mapping kernel VM */ 203 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 204 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 205 206 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 207 208 /* Prototypes */ 209 210 #if 0 211 void process_kernel_args(char *); 212 #endif 213 214 void consinit(void); 215 void kgdb_port_init(void); 216 void change_clock(uint32_t v); 217 218 bs_protos(bs_notimpl); 219 220 #include "com.h" 221 #if NCOM > 0 222 #include <dev/ic/comreg.h> 223 #include <dev/ic/comvar.h> 224 #endif 225 226 #ifndef CONSPEED 227 #define CONSPEED B115200 /* What RedBoot uses */ 228 #endif 229 #ifndef CONMODE 230 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 231 #endif 232 233 int comcnspeed = CONSPEED; 234 int comcnmode = CONMODE; 235 236 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 237 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 238 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 239 240 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 241 242 { -1 } 243 }; 244 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 245 pxa25x_com_btuart_gpioconf, 246 pxa25x_com_ffuart_gpioconf, 247 #if 0 248 pxa25x_com_stuart_gpioconf, 249 #endif 250 pxa25x_pcic_gpioconf, 251 pxa25x_pxaacu_gpioconf, 252 boarddep_gpioconf, 253 NULL 254 }; 255 256 /* 257 * void cpu_reboot(int howto, char *bootstr) 258 * 259 * Reboots the system 260 * 261 * Deal with any syncing, unmounting, dumping and shutdown hooks, 262 * then reset the CPU. 263 */ 264 void 265 cpu_reboot(int howto, char *bootstr) 266 { 267 #ifdef DIAGNOSTIC 268 /* info */ 269 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 270 #endif 271 272 /* 273 * If we are still cold then hit the air brakes 274 * and crash to earth fast 275 */ 276 if (cold) { 277 doshutdownhooks(); 278 pmf_system_shutdown(boothowto); 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 printf("rebooting...\n"); 283 cpu_reset(); 284 /*NOTREACHED*/ 285 } 286 287 /* Disable console buffering */ 288 /* cnpollc(1);*/ 289 290 /* 291 * If RB_NOSYNC was not specified sync the discs. 292 * Note: Unless cold is set to 1 here, syslogd will die during the 293 * unmount. It looks like syslogd is getting woken up only to find 294 * that it cannot page part of the binary in as the filesystem has 295 * been unmounted. 296 */ 297 if (!(howto & RB_NOSYNC)) 298 bootsync(); 299 300 /* Say NO to interrupts */ 301 splhigh(); 302 303 /* Do a dump if requested. */ 304 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 305 dumpsys(); 306 307 /* Run any shutdown hooks */ 308 doshutdownhooks(); 309 310 pmf_system_shutdown(boothowto); 311 312 /* Make sure IRQ's are disabled */ 313 IRQdisable; 314 315 if (howto & RB_HALT) { 316 printf("The operating system has halted.\n"); 317 printf("Please press any key to reboot.\n\n"); 318 cngetc(); 319 } 320 321 printf("rebooting...\n"); 322 cpu_reset(); 323 /*NOTREACHED*/ 324 } 325 326 static inline 327 pd_entry_t * 328 read_ttb(void) 329 { 330 long ttb; 331 332 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 333 334 335 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 336 } 337 338 /* 339 * Static device mappings. These peripheral registers are mapped at 340 * fixed virtual addresses very early in initarm() so that we can use 341 * them while booting the kernel, and stay at the same address 342 * throughout whole kernel's life time. 343 * 344 * We use this table twice; once with bootstrap page table, and once 345 * with kernel's page table which we build up in initarm(). 346 * 347 * Since we map these registers into the bootstrap page table using 348 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 349 * registers segment-aligned and segment-rounded in order to avoid 350 * using the 2nd page tables. 351 */ 352 353 #define _A(a) ((a) & ~L1_S_OFFSET) 354 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 355 356 static const struct pmap_devmap lubbock_devmap[] = { 357 { 358 LUBBOCK_OBIO_VBASE, 359 _A(LUBBOCK_OBIO_PBASE), 360 _S(LUBBOCK_OBIO_SIZE), 361 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 362 }, 363 { 364 LUBBOCK_GPIO_VBASE, 365 _A(PXA2X0_GPIO_BASE), 366 _S(PXA250_GPIO_SIZE), 367 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 368 }, 369 { 370 LUBBOCK_CLKMAN_VBASE, 371 _A(PXA2X0_CLKMAN_BASE), 372 _S(PXA2X0_CLKMAN_SIZE), 373 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 374 }, 375 { 376 LUBBOCK_INTCTL_VBASE, 377 _A(PXA2X0_INTCTL_BASE), 378 _S(PXA2X0_INTCTL_SIZE), 379 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 380 }, 381 { 382 LUBBOCK_FFUART_VBASE, 383 _A(PXA2X0_FFUART_BASE), 384 _S(4 * COM_NPORTS), 385 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 386 }, 387 { 388 LUBBOCK_BTUART_VBASE, 389 _A(PXA2X0_BTUART_BASE), 390 _S(4 * COM_NPORTS), 391 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 392 }, 393 394 {0, 0, 0, 0,} 395 }; 396 397 #undef _A 398 #undef _S 399 400 /* 401 * u_int initarm(...) 402 * 403 * Initial entry point on startup. This gets called before main() is 404 * entered. 405 * It should be responsible for setting up everything that must be 406 * in place when main is called. 407 * This includes 408 * Taking a copy of the boot configuration structure. 409 * Initialising the physical console so characters can be printed. 410 * Setting up page tables for the kernel 411 * Relocating the kernel to the bottom of physical memory 412 */ 413 u_int 414 initarm(void *arg) 415 { 416 extern vaddr_t xscale_cache_clean_addr; 417 int loop; 418 int loop1; 419 u_int l1pagetable; 420 paddr_t memstart; 421 psize_t memsize; 422 int led_data = 0; 423 #ifdef DIAGNOSTIC 424 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 425 #endif 426 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 427 #define LEDSTEP() hex_led(led_data++) 428 429 /* use physical address until pagetable is set */ 430 LEDSTEP_P(); 431 432 /* map some peripheral registers at static I/O area */ 433 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 434 435 LEDSTEP_P(); 436 437 /* start 32.768 kHz OSC */ 438 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 439 /* Get ready for splfoo() */ 440 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 441 442 LEDSTEP(); 443 444 /* 445 * Heads up ... Setup the CPU / MMU / TLB functions 446 */ 447 if (set_cpufuncs()) 448 panic("cpu not recognized!"); 449 450 LEDSTEP(); 451 452 453 #if 0 454 /* Calibrate the delay loop. */ 455 #endif 456 457 /* 458 * Okay, RedBoot has provided us with the following memory map: 459 * 460 * Physical Address Range Description 461 * ----------------------- ---------------------------------- 462 * 0x00000000 - 0x01ffffff flash Memory (32MB) 463 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 464 * 0x08000000 - 0x080000ff I/O baseboard registers 465 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 466 * 0x0c000000 - 0x0c0fffff Ethernet Controller 467 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 468 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 469 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 470 * 0x40000000 - 0x480fffff Processor Registers 471 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 472 * 473 * 474 * Virtual Address Range X C B Description 475 * ----------------------- - - - ---------------------------------- 476 * 0x00000000 - 0x00003fff N Y Y SDRAM 477 * 0x00004000 - 0x000fffff N Y N Boot ROM 478 * 0x00100000 - 0x01ffffff N N N Application Flash 479 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 480 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 481 * 0x0a000000 - 0x0a0fffff N N N SRAM 482 * 0x40000000 - 0x480fffff N N N Processor Registers 483 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 484 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 485 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 486 * (done by this routine) 487 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 488 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 489 * 0xfd400000 - 0xfd4fffff N N N FF-UART 490 * 0xfd500000 - 0xfd5fffff N N N BT-UART 491 * 492 * RedBoot's first level page table is at 0xa0004000. There 493 * are also 2 second-level tables at 0xa0008000 and 494 * 0xa0008400. We will continue to use them until we switch to 495 * our pagetable by cpu_setttb(). 496 * 497 */ 498 499 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 500 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 501 pxa2x0_gpio_config(lubbock_gpioconf); 502 503 /* turn on clock to UART block. 504 XXX: this should not be done here. */ 505 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 506 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 507 508 LEDSTEP(); 509 510 consinit(); 511 LEDSTEP(); 512 #ifdef KGDB 513 kgdb_port_init(); 514 LEDSTEP(); 515 #endif 516 517 518 /* Talk to the user */ 519 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 520 521 /* Tweak memory controller */ 522 { 523 /* Modify access timing for CS3 (91c96) */ 524 525 uint32_t tmp = 526 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 527 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 528 (tmp & 0xffff) | (0x3881<<16)); 529 /* RRR=3, RDN=8, RDF=8 530 * XXX: can be faster? 531 */ 532 } 533 534 535 /* Initialize for PCMCIA/CF sockets */ 536 { 537 uint32_t tmp; 538 539 /* Activate two sockets. 540 XXX: This code segment should be moved to 541 pcmcia MD attach routine. 542 XXX: These bits should be toggled based on 543 existene of PCMCIA/CF cards 544 */ 545 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 546 MECR_NOS|MECR_CIT); 547 548 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 549 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 550 (tmp & ~(1<<4)) | (1<<0)); 551 } 552 553 #if 0 554 /* 555 * Examine the boot args string for options we need to know about 556 * now. 557 */ 558 process_kernel_args((char *)nwbootinfo.bt_args); 559 #endif 560 561 { 562 int processor_card_id; 563 564 processor_card_id = 0x000f & 565 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 566 switch(processor_card_id){ 567 case 0: 568 /* Cotulla */ 569 memstart = 0xa0000000; 570 memsize = 0x04000000; /* 64MB */ 571 break; 572 case 1: 573 /* XXX: Sabiani */ 574 memstart = 0xa0000000; 575 memsize = 0x04000000; /* 64MB */ 576 break; 577 default: 578 /* XXX: Unknown */ 579 memstart = 0xa0000000; 580 memsize = 0x04000000; /* 64MB */ 581 } 582 } 583 584 printf("initarm: Configuring system ...\n"); 585 586 /* Fake bootconfig structure for the benefit of pmap.c */ 587 /* XXX must make the memory description h/w independent */ 588 bootconfig.dramblocks = 1; 589 bootconfig.dram[0].address = memstart; 590 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 591 592 /* 593 * Set up the variables that define the availablilty of 594 * physical memory. For now, we're going to set 595 * physical_freestart to 0xa0200000 (where the kernel 596 * was loaded), and allocate the memory we need downwards. 597 * If we get too close to the page tables that RedBoot 598 * set up, we will panic. We will update physical_freestart 599 * and physical_freeend later to reflect what pmap_bootstrap() 600 * wants to see. 601 * 602 * XXX pmap_bootstrap() needs an enema. 603 */ 604 physical_start = bootconfig.dram[0].address; 605 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 606 607 physical_freestart = 0xa0009000UL; 608 physical_freeend = 0xa0200000UL; 609 610 physmem = (physical_end - physical_start) / PAGE_SIZE; 611 612 #ifdef VERBOSE_INIT_ARM 613 /* Tell the user about the memory */ 614 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 615 physical_start, physical_end - 1); 616 #endif 617 618 /* 619 * Okay, the kernel starts 2MB in from the bottom of physical 620 * memory. We are going to allocate our bootstrap pages downwards 621 * from there. 622 * 623 * We need to allocate some fixed page tables to get the kernel 624 * going. We allocate one page directory and a number of page 625 * tables and store the physical addresses in the kernel_pt_table 626 * array. 627 * 628 * The kernel page directory must be on a 16K boundary. The page 629 * tables must be on 4K boundaries. What we do is allocate the 630 * page directory on the first 16K boundary that we encounter, and 631 * the page tables on 4K boundaries otherwise. Since we allocate 632 * at least 3 L2 page tables, we are guaranteed to encounter at 633 * least one 16K aligned region. 634 */ 635 636 #ifdef VERBOSE_INIT_ARM 637 printf("Allocating page tables\n"); 638 #endif 639 640 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 641 642 #ifdef VERBOSE_INIT_ARM 643 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 644 physical_freestart, free_pages, free_pages); 645 #endif 646 647 /* Define a macro to simplify memory allocation */ 648 #define valloc_pages(var, np) \ 649 alloc_pages((var).pv_pa, (np)); \ 650 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 651 652 #define alloc_pages(var, np) \ 653 physical_freeend -= ((np) * PAGE_SIZE); \ 654 if (physical_freeend < physical_freestart) \ 655 panic("initarm: out of memory"); \ 656 (var) = physical_freeend; \ 657 free_pages -= (np); \ 658 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 659 660 loop1 = 0; 661 kernel_l1pt.pv_pa = 0; 662 kernel_l1pt.pv_va = 0; 663 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 664 /* Are we 16KB aligned for an L1 ? */ 665 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 666 && kernel_l1pt.pv_pa == 0) { 667 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 668 } else { 669 valloc_pages(kernel_pt_table[loop1], 670 L2_TABLE_SIZE / PAGE_SIZE); 671 ++loop1; 672 } 673 } 674 675 /* This should never be able to happen but better confirm that. */ 676 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 677 panic("initarm: Failed to align the kernel page directory"); 678 679 LEDSTEP(); 680 681 /* 682 * Allocate a page for the system page mapped to V0x00000000 683 * This page will just contain the system vectors and can be 684 * shared by all processes. 685 */ 686 alloc_pages(systempage.pv_pa, 1); 687 688 /* Allocate stacks for all modes */ 689 valloc_pages(irqstack, IRQ_STACK_SIZE); 690 valloc_pages(abtstack, ABT_STACK_SIZE); 691 valloc_pages(undstack, UND_STACK_SIZE); 692 valloc_pages(kernelstack, UPAGES); 693 694 /* Allocate enough pages for cleaning the Mini-Data cache. */ 695 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 696 valloc_pages(minidataclean, 1); 697 698 #ifdef VERBOSE_INIT_ARM 699 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 700 irqstack.pv_va); 701 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 702 abtstack.pv_va); 703 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 704 undstack.pv_va); 705 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 706 kernelstack.pv_va); 707 #endif 708 709 /* 710 * XXX Defer this to later so that we can reclaim the memory 711 * XXX used by the RedBoot page tables. 712 */ 713 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 714 715 /* 716 * Ok we have allocated physical pages for the primary kernel 717 * page tables 718 */ 719 720 #ifdef VERBOSE_INIT_ARM 721 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 722 #endif 723 724 /* 725 * Now we start construction of the L1 page table 726 * We start by mapping the L2 page tables into the L1. 727 * This means that we can replace L1 mappings later on if necessary 728 */ 729 l1pagetable = kernel_l1pt.pv_pa; 730 731 /* Map the L2 pages tables in the L1 page table */ 732 pmap_link_l2pt(l1pagetable, 0x00000000, 733 &kernel_pt_table[KERNEL_PT_SYS]); 734 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 735 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 736 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 737 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 738 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 739 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 740 741 /* update the top of the kernel VM */ 742 pmap_curmaxkvaddr = 743 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 744 745 #ifdef VERBOSE_INIT_ARM 746 printf("Mapping kernel\n"); 747 #endif 748 749 /* Now we fill in the L2 pagetable for the kernel static code/data */ 750 { 751 extern char etext[], _end[]; 752 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 753 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 754 u_int logical; 755 756 textsize = (textsize + PGOFSET) & ~PGOFSET; 757 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 758 759 logical = 0x00200000; /* offset of kernel in RAM */ 760 761 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 762 physical_start + logical, textsize, 763 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 764 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 765 physical_start + logical, totalsize - textsize, 766 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 767 } 768 769 #ifdef VERBOSE_INIT_ARM 770 printf("Constructing L2 page tables\n"); 771 #endif 772 773 /* Map the stack pages */ 774 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 775 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 776 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 777 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 778 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 779 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 780 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 781 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 782 783 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 784 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 785 786 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 787 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 788 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 789 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 790 } 791 792 /* Map the Mini-Data cache clean area. */ 793 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 794 minidataclean.pv_pa); 795 796 /* Map the vector page. */ 797 #if 1 798 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 799 * cache-clean code there. */ 800 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 801 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 802 #else 803 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 804 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 805 #endif 806 807 /* 808 * map integrated peripherals at same address in l1pagetable 809 * so that we can continue to use console. 810 */ 811 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 812 813 /* 814 * Give the XScale global cache clean code an appropriately 815 * sized chunk of unmapped VA space starting at 0xff000000 816 * (our device mappings end before this address). 817 */ 818 xscale_cache_clean_addr = 0xff000000U; 819 820 /* 821 * Now we have the real page tables in place so we can switch to them. 822 * Once this is done we will be running with the REAL kernel page 823 * tables. 824 */ 825 826 /* 827 * Update the physical_freestart/physical_freeend/free_pages 828 * variables. 829 */ 830 { 831 extern char _end[]; 832 833 physical_freestart = physical_start + 834 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 835 KERNEL_BASE); 836 physical_freeend = physical_end; 837 free_pages = 838 (physical_freeend - physical_freestart) / PAGE_SIZE; 839 } 840 841 /* Switch tables */ 842 #ifdef VERBOSE_INIT_ARM 843 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 844 physical_freestart, free_pages, free_pages); 845 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 846 #endif 847 848 LEDSTEP(); 849 850 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 851 cpu_setttb(kernel_l1pt.pv_pa, true); 852 cpu_tlb_flushID(); 853 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 854 LEDSTEP(); 855 856 /* 857 * Moved from cpu_startup() as data_abort_handler() references 858 * this during uvm init 859 */ 860 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 861 862 #ifdef VERBOSE_INIT_ARM 863 printf("bootstrap done.\n"); 864 #endif 865 866 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 867 868 /* 869 * Pages were allocated during the secondary bootstrap for the 870 * stacks for different CPU modes. 871 * We must now set the r13 registers in the different CPU modes to 872 * point to these stacks. 873 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 874 * of the stack memory. 875 */ 876 printf("init subsystems: stacks "); 877 878 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 879 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 880 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 881 882 /* 883 * Well we should set a data abort handler. 884 * Once things get going this will change as we will need a proper 885 * handler. 886 * Until then we will use a handler that just panics but tells us 887 * why. 888 * Initialisation of the vectors will just panic on a data abort. 889 * This just fills in a slightly better one. 890 */ 891 printf("vectors "); 892 data_abort_handler_address = (u_int)data_abort_handler; 893 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 894 undefined_handler_address = (u_int)undefinedinstruction_bounce; 895 896 /* Initialise the undefined instruction handlers */ 897 printf("undefined "); 898 undefined_init(); 899 900 /* Load memory into UVM. */ 901 printf("page "); 902 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 903 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 904 atop(physical_freestart), atop(physical_freeend), 905 VM_FREELIST_DEFAULT); 906 907 /* Boot strap pmap telling it where the kernel page table is */ 908 printf("pmap "); 909 LEDSTEP(); 910 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 911 LEDSTEP(); 912 913 #ifdef __HAVE_MEMORY_DISK__ 914 md_root_setconf(memory_disk, sizeof memory_disk); 915 #endif 916 917 { 918 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 919 920 if (0 == (sw & (1<<13))) /* check S19 */ 921 boothowto |= RB_KDB; 922 if (0 == (sw & (1<<12))) /* S20 */ 923 boothowto |= RB_SINGLE; 924 } 925 926 LEDSTEP(); 927 928 #ifdef KGDB 929 if (boothowto & RB_KDB) { 930 kgdb_debug_init = 1; 931 kgdb_connect(1); 932 } 933 #endif 934 935 #ifdef DDB 936 db_machine_init(); 937 938 /* Firmware doesn't load symbols. */ 939 ddb_init(0, NULL, NULL); 940 941 if (boothowto & RB_KDB) 942 Debugger(); 943 #endif 944 945 /* We return the new stack pointer address */ 946 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 947 } 948 949 #if 0 950 void 951 process_kernel_args(char *args) 952 { 953 954 boothowto = 0; 955 956 /* Make a local copy of the bootargs */ 957 strncpy(bootargs, args, MAX_BOOT_STRING); 958 959 args = bootargs; 960 boot_file = bootargs; 961 962 /* Skip the kernel image filename */ 963 while (*args != ' ' && *args != 0) 964 ++args; 965 966 if (*args != 0) 967 *args++ = 0; 968 969 while (*args == ' ') 970 ++args; 971 972 boot_args = args; 973 974 printf("bootfile: %s\n", boot_file); 975 printf("bootargs: %s\n", boot_args); 976 977 parse_mi_bootargs(boot_args); 978 } 979 #endif 980 981 #ifdef KGDB 982 #ifndef KGDB_DEVNAME 983 #define KGDB_DEVNAME "ffuart" 984 #endif 985 const char kgdb_devname[] = KGDB_DEVNAME; 986 987 #if (NCOM > 0) 988 #ifndef KGDB_DEVMODE 989 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 990 #endif 991 int comkgdbmode = KGDB_DEVMODE; 992 #endif /* NCOM */ 993 994 #endif /* KGDB */ 995 996 997 void 998 consinit(void) 999 { 1000 static int consinit_called = 0; 1001 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1002 #if 0 1003 char *console = CONSDEVNAME; 1004 #endif 1005 1006 if (consinit_called != 0) 1007 return; 1008 1009 consinit_called = 1; 1010 1011 #if NCOM > 0 1012 1013 #ifdef FFUARTCONSOLE 1014 /* Check switch. */ 1015 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1016 /* We don't use FF serial when S17=no-dot position */ 1017 } 1018 #ifdef KGDB 1019 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1020 /* port is reserved for kgdb */ 1021 } 1022 #endif 1023 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1024 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1025 #if 0 1026 /* XXX: can't call pxa2x0_clkman_config yet */ 1027 pxa2x0_clkman_config(CKEN_FFUART, 1); 1028 #else 1029 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1030 ckenreg|CKEN_FFUART); 1031 #endif 1032 1033 return; 1034 } 1035 #endif /* FFUARTCONSOLE */ 1036 1037 #ifdef BTUARTCONSOLE 1038 #ifdef KGDB 1039 if (0 == strcmp(kgdb_devname, "btuart")) { 1040 /* port is reserved for kgdb */ 1041 } else 1042 #endif 1043 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1044 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1045 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1046 ckenreg|CKEN_BTUART); 1047 return; 1048 } 1049 #endif /* BTUARTCONSOLE */ 1050 1051 1052 #endif /* NCOM */ 1053 1054 } 1055 1056 #ifdef KGDB 1057 void 1058 kgdb_port_init(void) 1059 { 1060 #if (NCOM > 0) && defined(COM_PXA2X0) 1061 paddr_t paddr = 0; 1062 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1063 1064 if (0 == strcmp(kgdb_devname, "ffuart")) { 1065 paddr = PXA2X0_FFUART_BASE; 1066 ckenreg |= CKEN_FFUART; 1067 } 1068 else if (0 == strcmp(kgdb_devname, "btuart")) { 1069 paddr = PXA2X0_BTUART_BASE; 1070 ckenreg |= CKEN_BTUART; 1071 } 1072 1073 if (paddr && 1074 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1075 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1076 1077 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1078 } 1079 #endif 1080 } 1081 #endif 1082 1083 #if 0 1084 /* 1085 * display a number in hex LED. 1086 * a digit is blank when the corresponding bit in arg blank is 1 1087 */ 1088 unsigned short led_control_value = 0; 1089 1090 void 1091 hex_led_blank(uint32_t value, int blank) 1092 { 1093 int save = disable_interrupts(I32_bit); 1094 1095 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1096 led_control_value = (led_control_value & 0xff) 1097 | ((blank & 0xff)<<8); 1098 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1099 restore_interrupts(save); 1100 } 1101 #endif 1102
Indexes created Thu Oct 23 22:10:10 GMT 2025