lubbock_machdep.c revision 1.34.14.1
1 /* $NetBSD: lubbock_machdep.c,v 1.34.14.1 2018/09/06 06:55:31 pgoyette 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 1.34.14.1 2018/09/06 06:55:31 pgoyette Exp $"); 116 117 #include "opt_arm_debug.h" 118 #include "opt_ddb.h" 119 #include "opt_kgdb.h" 120 #include "opt_pmap_debug.h" 121 #include "opt_md.h" 122 #include "opt_com.h" 123 #include "lcd.h" 124 125 #include <sys/param.h> 126 #include <sys/device.h> 127 #include <sys/systm.h> 128 #include <sys/kernel.h> 129 #include <sys/exec.h> 130 #include <sys/proc.h> 131 #include <sys/msgbuf.h> 132 #include <sys/reboot.h> 133 #include <sys/termios.h> 134 #include <sys/ksyms.h> 135 #include <sys/bus.h> 136 #include <sys/cpu.h> 137 #include <sys/conf.h> 138 139 #include <uvm/uvm_extern.h> 140 141 #include <dev/cons.h> 142 #include <dev/md.h> 143 #include <dev/ic/smc91cxxreg.h> 144 145 #include <machine/db_machdep.h> 146 #include <ddb/db_sym.h> 147 #include <ddb/db_extern.h> 148 #ifdef KGDB 149 #include <sys/kgdb.h> 150 #endif 151 152 #include <machine/bootconfig.h> 153 #include <arm/locore.h> 154 #include <arm/undefined.h> 155 156 #include <arm/arm32/machdep.h> 157 158 #include <arm/xscale/pxa2x0reg.h> 159 #include <arm/xscale/pxa2x0var.h> 160 #include <arm/xscale/pxa2x0_gpio.h> 161 #include <arm/sa11x0/sa1111_reg.h> 162 #include <evbarm/lubbock/lubbock_reg.h> 163 #include <evbarm/lubbock/lubbock_var.h> 164 165 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 166 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 167 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 168 169 /* 170 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 171 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 172 */ 173 #define KERNEL_VM_SIZE 0x0C000000 174 175 BootConfig bootconfig; /* Boot config storage */ 176 char *boot_args = NULL; 177 char *boot_file = NULL; 178 179 vaddr_t physical_start; 180 vaddr_t physical_freestart; 181 vaddr_t physical_freeend; 182 vaddr_t physical_end; 183 u_int free_pages; 184 185 /*int debug_flags;*/ 186 #ifndef PMAP_STATIC_L1S 187 int max_processes = 64; /* Default number */ 188 #endif /* !PMAP_STATIC_L1S */ 189 190 /* Physical and virtual addresses for some global pages */ 191 pv_addr_t minidataclean; 192 193 paddr_t msgbufphys; 194 195 #ifdef PMAP_DEBUG 196 extern int pmap_debug_level; 197 #endif 198 199 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 200 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 201 #define KERNEL_PT_KERNEL_NUM 4 202 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 203 /* Page tables for mapping kernel VM */ 204 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 205 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 206 207 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 208 209 /* Prototypes */ 210 211 #if 0 212 void process_kernel_args(char *); 213 #endif 214 215 void consinit(void); 216 void kgdb_port_init(void); 217 void change_clock(uint32_t v); 218 219 bs_protos(bs_notimpl); 220 221 #include "com.h" 222 #if NCOM > 0 223 #include <dev/ic/comreg.h> 224 #include <dev/ic/comvar.h> 225 #endif 226 227 #ifndef CONSPEED 228 #define CONSPEED B115200 /* What RedBoot uses */ 229 #endif 230 #ifndef CONMODE 231 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 232 #endif 233 234 int comcnspeed = CONSPEED; 235 int comcnmode = CONMODE; 236 237 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 238 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 239 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 240 241 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 242 243 { -1 } 244 }; 245 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 246 pxa25x_com_btuart_gpioconf, 247 pxa25x_com_ffuart_gpioconf, 248 #if 0 249 pxa25x_com_stuart_gpioconf, 250 #endif 251 pxa25x_pcic_gpioconf, 252 pxa25x_pxaacu_gpioconf, 253 boarddep_gpioconf, 254 NULL 255 }; 256 257 /* 258 * void cpu_reboot(int howto, char *bootstr) 259 * 260 * Reboots the system 261 * 262 * Deal with any syncing, unmounting, dumping and shutdown hooks, 263 * then reset the CPU. 264 */ 265 void 266 cpu_reboot(int howto, char *bootstr) 267 { 268 #ifdef DIAGNOSTIC 269 /* info */ 270 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 271 #endif 272 273 /* 274 * If we are still cold then hit the air brakes 275 * and crash to earth fast 276 */ 277 if (cold) { 278 doshutdownhooks(); 279 pmf_system_shutdown(boothowto); 280 printf("The operating system has halted.\n"); 281 printf("Please press any key to reboot.\n\n"); 282 cngetc(); 283 printf("rebooting...\n"); 284 cpu_reset(); 285 /*NOTREACHED*/ 286 } 287 288 /* Disable console buffering */ 289 /* cnpollc(1);*/ 290 291 /* 292 * If RB_NOSYNC was not specified sync the discs. 293 * Note: Unless cold is set to 1 here, syslogd will die during the 294 * unmount. It looks like syslogd is getting woken up only to find 295 * that it cannot page part of the binary in as the filesystem has 296 * been unmounted. 297 */ 298 if (!(howto & RB_NOSYNC)) 299 bootsync(); 300 301 /* Say NO to interrupts */ 302 splhigh(); 303 304 /* Do a dump if requested. */ 305 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 306 dumpsys(); 307 308 /* Run any shutdown hooks */ 309 doshutdownhooks(); 310 311 pmf_system_shutdown(boothowto); 312 313 /* Make sure IRQ's are disabled */ 314 IRQdisable; 315 316 if (howto & RB_HALT) { 317 printf("The operating system has halted.\n"); 318 printf("Please press any key to reboot.\n\n"); 319 cngetc(); 320 } 321 322 printf("rebooting...\n"); 323 cpu_reset(); 324 /*NOTREACHED*/ 325 } 326 327 static inline 328 pd_entry_t * 329 read_ttb(void) 330 { 331 long ttb; 332 333 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 334 335 336 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 337 } 338 339 /* 340 * Static device mappings. These peripheral registers are mapped at 341 * fixed virtual addresses very early in initarm() so that we can use 342 * them while booting the kernel, and stay at the same address 343 * throughout whole kernel's life time. 344 * 345 * We use this table twice; once with bootstrap page table, and once 346 * with kernel's page table which we build up in initarm(). 347 * 348 * Since we map these registers into the bootstrap page table using 349 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 350 * registers segment-aligned and segment-rounded in order to avoid 351 * using the 2nd page tables. 352 */ 353 354 #define _A(a) ((a) & ~L1_S_OFFSET) 355 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 356 357 static const struct pmap_devmap lubbock_devmap[] = { 358 { 359 LUBBOCK_OBIO_VBASE, 360 _A(LUBBOCK_OBIO_PBASE), 361 _S(LUBBOCK_OBIO_SIZE), 362 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 363 }, 364 { 365 LUBBOCK_GPIO_VBASE, 366 _A(PXA2X0_GPIO_BASE), 367 _S(PXA250_GPIO_SIZE), 368 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 369 }, 370 { 371 LUBBOCK_CLKMAN_VBASE, 372 _A(PXA2X0_CLKMAN_BASE), 373 _S(PXA2X0_CLKMAN_SIZE), 374 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 375 }, 376 { 377 LUBBOCK_INTCTL_VBASE, 378 _A(PXA2X0_INTCTL_BASE), 379 _S(PXA2X0_INTCTL_SIZE), 380 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 381 }, 382 { 383 LUBBOCK_FFUART_VBASE, 384 _A(PXA2X0_FFUART_BASE), 385 _S(4 * COM_NPORTS), 386 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 387 }, 388 { 389 LUBBOCK_BTUART_VBASE, 390 _A(PXA2X0_BTUART_BASE), 391 _S(4 * COM_NPORTS), 392 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 393 }, 394 395 {0, 0, 0, 0,} 396 }; 397 398 #undef _A 399 #undef _S 400 401 /* 402 * u_int initarm(...) 403 * 404 * Initial entry point on startup. This gets called before main() is 405 * entered. 406 * It should be responsible for setting up everything that must be 407 * in place when main is called. 408 * This includes 409 * Taking a copy of the boot configuration structure. 410 * Initialising the physical console so characters can be printed. 411 * Setting up page tables for the kernel 412 * Relocating the kernel to the bottom of physical memory 413 */ 414 u_int 415 initarm(void *arg) 416 { 417 extern vaddr_t xscale_cache_clean_addr; 418 int loop; 419 int loop1; 420 u_int l1pagetable; 421 paddr_t memstart; 422 psize_t memsize; 423 int led_data = 0; 424 #ifdef DIAGNOSTIC 425 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 426 #endif 427 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 428 #define LEDSTEP() hex_led(led_data++) 429 430 /* use physical address until pagetable is set */ 431 LEDSTEP_P(); 432 433 /* map some peripheral registers at static I/O area */ 434 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 435 436 LEDSTEP_P(); 437 438 /* start 32.768 kHz OSC */ 439 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 440 /* Get ready for splfoo() */ 441 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 442 443 LEDSTEP(); 444 445 /* 446 * Heads up ... Setup the CPU / MMU / TLB functions 447 */ 448 if (set_cpufuncs()) 449 panic("cpu not recognized!"); 450 451 LEDSTEP(); 452 453 454 #if 0 455 /* Calibrate the delay loop. */ 456 #endif 457 458 /* 459 * Okay, RedBoot has provided us with the following memory map: 460 * 461 * Physical Address Range Description 462 * ----------------------- ---------------------------------- 463 * 0x00000000 - 0x01ffffff flash Memory (32MB) 464 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 465 * 0x08000000 - 0x080000ff I/O baseboard registers 466 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 467 * 0x0c000000 - 0x0c0fffff Ethernet Controller 468 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 469 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 470 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 471 * 0x40000000 - 0x480fffff Processor Registers 472 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 473 * 474 * 475 * Virtual Address Range X C B Description 476 * ----------------------- - - - ---------------------------------- 477 * 0x00000000 - 0x00003fff N Y Y SDRAM 478 * 0x00004000 - 0x000fffff N Y N Boot ROM 479 * 0x00100000 - 0x01ffffff N N N Application Flash 480 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 481 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 482 * 0x0a000000 - 0x0a0fffff N N N SRAM 483 * 0x40000000 - 0x480fffff N N N Processor Registers 484 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 485 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 486 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 487 * (done by this routine) 488 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 489 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 490 * 0xfd400000 - 0xfd4fffff N N N FF-UART 491 * 0xfd500000 - 0xfd5fffff N N N BT-UART 492 * 493 * RedBoot's first level page table is at 0xa0004000. There 494 * are also 2 second-level tables at 0xa0008000 and 495 * 0xa0008400. We will continue to use them until we switch to 496 * our pagetable by cpu_setttb(). 497 * 498 */ 499 500 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 501 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 502 pxa2x0_gpio_config(lubbock_gpioconf); 503 504 /* turn on clock to UART block. 505 XXX: this should not be done here. */ 506 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 507 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 508 509 LEDSTEP(); 510 511 consinit(); 512 LEDSTEP(); 513 #ifdef KGDB 514 kgdb_port_init(); 515 LEDSTEP(); 516 #endif 517 518 519 /* Talk to the user */ 520 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 521 522 /* Tweak memory controller */ 523 { 524 /* Modify access timing for CS3 (91c96) */ 525 526 uint32_t tmp = 527 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 528 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 529 (tmp & 0xffff) | (0x3881<<16)); 530 /* RRR=3, RDN=8, RDF=8 531 * XXX: can be faster? 532 */ 533 } 534 535 536 /* Initialize for PCMCIA/CF sockets */ 537 { 538 uint32_t tmp; 539 540 /* Activate two sockets. 541 XXX: This code segment should be moved to 542 pcmcia MD attach routine. 543 XXX: These bits should be toggled based on 544 existene of PCMCIA/CF cards 545 */ 546 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 547 MECR_NOS|MECR_CIT); 548 549 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 550 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 551 (tmp & ~(1<<4)) | (1<<0)); 552 } 553 554 #if 0 555 /* 556 * Examine the boot args string for options we need to know about 557 * now. 558 */ 559 process_kernel_args((char *)nwbootinfo.bt_args); 560 #endif 561 562 { 563 int processor_card_id; 564 565 processor_card_id = 0x000f & 566 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 567 switch(processor_card_id){ 568 case 0: 569 /* Cotulla */ 570 memstart = 0xa0000000; 571 memsize = 0x04000000; /* 64MB */ 572 break; 573 case 1: 574 /* XXX: Sabiani */ 575 memstart = 0xa0000000; 576 memsize = 0x04000000; /* 64MB */ 577 break; 578 default: 579 /* XXX: Unknown */ 580 memstart = 0xa0000000; 581 memsize = 0x04000000; /* 64MB */ 582 } 583 } 584 585 printf("initarm: Configuring system ...\n"); 586 587 /* Fake bootconfig structure for the benefit of pmap.c */ 588 /* XXX must make the memory description h/w independent */ 589 bootconfig.dramblocks = 1; 590 bootconfig.dram[0].address = memstart; 591 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 592 593 /* 594 * Set up the variables that define the availablilty of 595 * physical memory. For now, we're going to set 596 * physical_freestart to 0xa0200000 (where the kernel 597 * was loaded), and allocate the memory we need downwards. 598 * If we get too close to the page tables that RedBoot 599 * set up, we will panic. We will update physical_freestart 600 * and physical_freeend later to reflect what pmap_bootstrap() 601 * wants to see. 602 * 603 * XXX pmap_bootstrap() needs an enema. 604 */ 605 physical_start = bootconfig.dram[0].address; 606 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 607 608 physical_freestart = 0xa0009000UL; 609 physical_freeend = 0xa0200000UL; 610 611 physmem = (physical_end - physical_start) / PAGE_SIZE; 612 613 #ifdef VERBOSE_INIT_ARM 614 /* Tell the user about the memory */ 615 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 616 physical_start, physical_end - 1); 617 #endif 618 619 /* 620 * Okay, the kernel starts 2MB in from the bottom of physical 621 * memory. We are going to allocate our bootstrap pages downwards 622 * from there. 623 * 624 * We need to allocate some fixed page tables to get the kernel 625 * going. We allocate one page directory and a number of page 626 * tables and store the physical addresses in the kernel_pt_table 627 * array. 628 * 629 * The kernel page directory must be on a 16K boundary. The page 630 * tables must be on 4K boundaries. What we do is allocate the 631 * page directory on the first 16K boundary that we encounter, and 632 * the page tables on 4K boundaries otherwise. Since we allocate 633 * at least 3 L2 page tables, we are guaranteed to encounter at 634 * least one 16K aligned region. 635 */ 636 637 #ifdef VERBOSE_INIT_ARM 638 printf("Allocating page tables\n"); 639 #endif 640 641 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 642 643 #ifdef VERBOSE_INIT_ARM 644 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 645 physical_freestart, free_pages, free_pages); 646 #endif 647 648 /* Define a macro to simplify memory allocation */ 649 #define valloc_pages(var, np) \ 650 alloc_pages((var).pv_pa, (np)); \ 651 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 652 653 #define alloc_pages(var, np) \ 654 physical_freeend -= ((np) * PAGE_SIZE); \ 655 if (physical_freeend < physical_freestart) \ 656 panic("initarm: out of memory"); \ 657 (var) = physical_freeend; \ 658 free_pages -= (np); \ 659 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 660 661 loop1 = 0; 662 kernel_l1pt.pv_pa = 0; 663 kernel_l1pt.pv_va = 0; 664 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 665 /* Are we 16KB aligned for an L1 ? */ 666 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 667 && kernel_l1pt.pv_pa == 0) { 668 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 669 } else { 670 valloc_pages(kernel_pt_table[loop1], 671 L2_TABLE_SIZE / PAGE_SIZE); 672 ++loop1; 673 } 674 } 675 676 /* This should never be able to happen but better confirm that. */ 677 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 678 panic("initarm: Failed to align the kernel page directory"); 679 680 LEDSTEP(); 681 682 /* 683 * Allocate a page for the system page mapped to V0x00000000 684 * This page will just contain the system vectors and can be 685 * shared by all processes. 686 */ 687 alloc_pages(systempage.pv_pa, 1); 688 689 /* Allocate stacks for all modes */ 690 valloc_pages(irqstack, IRQ_STACK_SIZE); 691 valloc_pages(abtstack, ABT_STACK_SIZE); 692 valloc_pages(undstack, UND_STACK_SIZE); 693 valloc_pages(kernelstack, UPAGES); 694 695 /* Allocate enough pages for cleaning the Mini-Data cache. */ 696 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 697 valloc_pages(minidataclean, 1); 698 699 #ifdef VERBOSE_INIT_ARM 700 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 701 irqstack.pv_va); 702 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 703 abtstack.pv_va); 704 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 705 undstack.pv_va); 706 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 707 kernelstack.pv_va); 708 #endif 709 710 /* 711 * XXX Defer this to later so that we can reclaim the memory 712 * XXX used by the RedBoot page tables. 713 */ 714 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 715 716 /* 717 * Ok we have allocated physical pages for the primary kernel 718 * page tables 719 */ 720 721 #ifdef VERBOSE_INIT_ARM 722 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 723 #endif 724 725 /* 726 * Now we start construction of the L1 page table 727 * We start by mapping the L2 page tables into the L1. 728 * This means that we can replace L1 mappings later on if necessary 729 */ 730 l1pagetable = kernel_l1pt.pv_pa; 731 732 /* Map the L2 pages tables in the L1 page table */ 733 pmap_link_l2pt(l1pagetable, 0x00000000, 734 &kernel_pt_table[KERNEL_PT_SYS]); 735 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 736 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 737 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 738 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 739 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 740 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 741 742 /* update the top of the kernel VM */ 743 pmap_curmaxkvaddr = 744 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 745 746 #ifdef VERBOSE_INIT_ARM 747 printf("Mapping kernel\n"); 748 #endif 749 750 /* Now we fill in the L2 pagetable for the kernel static code/data */ 751 { 752 extern char etext[], _end[]; 753 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 754 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 755 u_int logical; 756 757 textsize = (textsize + PGOFSET) & ~PGOFSET; 758 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 759 760 logical = 0x00200000; /* offset of kernel in RAM */ 761 762 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 763 physical_start + logical, textsize, 764 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 765 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 766 physical_start + logical, totalsize - textsize, 767 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 768 } 769 770 #ifdef VERBOSE_INIT_ARM 771 printf("Constructing L2 page tables\n"); 772 #endif 773 774 /* Map the stack pages */ 775 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 776 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 777 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 778 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 779 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 780 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 781 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 782 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 783 784 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 785 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 786 787 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 788 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 789 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 790 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 791 } 792 793 /* Map the Mini-Data cache clean area. */ 794 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 795 minidataclean.pv_pa); 796 797 /* Map the vector page. */ 798 #if 1 799 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 800 * cache-clean code there. */ 801 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 802 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 803 #else 804 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 805 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 806 #endif 807 808 /* 809 * map integrated peripherals at same address in l1pagetable 810 * so that we can continue to use console. 811 */ 812 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 813 814 /* 815 * Give the XScale global cache clean code an appropriately 816 * sized chunk of unmapped VA space starting at 0xff000000 817 * (our device mappings end before this address). 818 */ 819 xscale_cache_clean_addr = 0xff000000U; 820 821 /* 822 * Now we have the real page tables in place so we can switch to them. 823 * Once this is done we will be running with the REAL kernel page 824 * tables. 825 */ 826 827 /* 828 * Update the physical_freestart/physical_freeend/free_pages 829 * variables. 830 */ 831 { 832 extern char _end[]; 833 834 physical_freestart = physical_start + 835 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 836 KERNEL_BASE); 837 physical_freeend = physical_end; 838 free_pages = 839 (physical_freeend - physical_freestart) / PAGE_SIZE; 840 } 841 842 /* Switch tables */ 843 #ifdef VERBOSE_INIT_ARM 844 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 845 physical_freestart, free_pages, free_pages); 846 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 847 #endif 848 849 LEDSTEP(); 850 851 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 852 cpu_setttb(kernel_l1pt.pv_pa, true); 853 cpu_tlb_flushID(); 854 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 855 LEDSTEP(); 856 857 /* 858 * Moved from cpu_startup() as data_abort_handler() references 859 * this during uvm init 860 */ 861 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 862 863 #ifdef VERBOSE_INIT_ARM 864 printf("bootstrap done.\n"); 865 #endif 866 867 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 868 869 /* 870 * Pages were allocated during the secondary bootstrap for the 871 * stacks for different CPU modes. 872 * We must now set the r13 registers in the different CPU modes to 873 * point to these stacks. 874 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 875 * of the stack memory. 876 */ 877 printf("init subsystems: stacks "); 878 879 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 880 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 881 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 882 883 /* 884 * Well we should set a data abort handler. 885 * Once things get going this will change as we will need a proper 886 * handler. 887 * Until then we will use a handler that just panics but tells us 888 * why. 889 * Initialisation of the vectors will just panic on a data abort. 890 * This just fills in a slightly better one. 891 */ 892 printf("vectors "); 893 data_abort_handler_address = (u_int)data_abort_handler; 894 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 895 undefined_handler_address = (u_int)undefinedinstruction_bounce; 896 897 /* Initialise the undefined instruction handlers */ 898 printf("undefined "); 899 undefined_init(); 900 901 /* Load memory into UVM. */ 902 printf("page "); 903 uvm_md_init(); 904 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 905 atop(physical_freestart), atop(physical_freeend), 906 VM_FREELIST_DEFAULT); 907 908 /* Boot strap pmap telling it where the kernel page table is */ 909 printf("pmap "); 910 LEDSTEP(); 911 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 912 LEDSTEP(); 913 914 #ifdef __HAVE_MEMORY_DISK__ 915 md_root_setconf(memory_disk, sizeof memory_disk); 916 #endif 917 918 { 919 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 920 921 if (0 == (sw & (1<<13))) /* check S19 */ 922 boothowto |= RB_KDB; 923 if (0 == (sw & (1<<12))) /* S20 */ 924 boothowto |= RB_SINGLE; 925 } 926 927 LEDSTEP(); 928 929 #ifdef KGDB 930 if (boothowto & RB_KDB) { 931 kgdb_debug_init = 1; 932 kgdb_connect(1); 933 } 934 #endif 935 936 #ifdef DDB 937 db_machine_init(); 938 939 /* Firmware doesn't load symbols. */ 940 ddb_init(0, NULL, NULL); 941 942 if (boothowto & RB_KDB) 943 Debugger(); 944 #endif 945 946 /* We return the new stack pointer address */ 947 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 948 } 949 950 #if 0 951 void 952 process_kernel_args(char *args) 953 { 954 955 boothowto = 0; 956 957 /* Make a local copy of the bootargs */ 958 strncpy(bootargs, args, MAX_BOOT_STRING); 959 960 args = bootargs; 961 boot_file = bootargs; 962 963 /* Skip the kernel image filename */ 964 while (*args != ' ' && *args != 0) 965 ++args; 966 967 if (*args != 0) 968 *args++ = 0; 969 970 while (*args == ' ') 971 ++args; 972 973 boot_args = args; 974 975 printf("bootfile: %s\n", boot_file); 976 printf("bootargs: %s\n", boot_args); 977 978 parse_mi_bootargs(boot_args); 979 } 980 #endif 981 982 #ifdef KGDB 983 #ifndef KGDB_DEVNAME 984 #define KGDB_DEVNAME "ffuart" 985 #endif 986 const char kgdb_devname[] = KGDB_DEVNAME; 987 988 #if (NCOM > 0) 989 #ifndef KGDB_DEVMODE 990 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 991 #endif 992 int comkgdbmode = KGDB_DEVMODE; 993 #endif /* NCOM */ 994 995 #endif /* KGDB */ 996 997 998 void 999 consinit(void) 1000 { 1001 static int consinit_called = 0; 1002 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1003 #if 0 1004 char *console = CONSDEVNAME; 1005 #endif 1006 1007 if (consinit_called != 0) 1008 return; 1009 1010 consinit_called = 1; 1011 1012 #if NCOM > 0 1013 1014 #ifdef FFUARTCONSOLE 1015 /* Check switch. */ 1016 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1017 /* We don't use FF serial when S17=no-dot position */ 1018 } 1019 #ifdef KGDB 1020 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1021 /* port is reserved for kgdb */ 1022 } 1023 #endif 1024 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1025 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1026 #if 0 1027 /* XXX: can't call pxa2x0_clkman_config yet */ 1028 pxa2x0_clkman_config(CKEN_FFUART, 1); 1029 #else 1030 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1031 ckenreg|CKEN_FFUART); 1032 #endif 1033 1034 return; 1035 } 1036 #endif /* FFUARTCONSOLE */ 1037 1038 #ifdef BTUARTCONSOLE 1039 #ifdef KGDB 1040 if (0 == strcmp(kgdb_devname, "btuart")) { 1041 /* port is reserved for kgdb */ 1042 } else 1043 #endif 1044 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1045 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1046 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1047 ckenreg|CKEN_BTUART); 1048 return; 1049 } 1050 #endif /* BTUARTCONSOLE */ 1051 1052 1053 #endif /* NCOM */ 1054 1055 } 1056 1057 #ifdef KGDB 1058 void 1059 kgdb_port_init(void) 1060 { 1061 #if (NCOM > 0) && defined(COM_PXA2X0) 1062 paddr_t paddr = 0; 1063 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1064 1065 if (0 == strcmp(kgdb_devname, "ffuart")) { 1066 paddr = PXA2X0_FFUART_BASE; 1067 ckenreg |= CKEN_FFUART; 1068 } 1069 else if (0 == strcmp(kgdb_devname, "btuart")) { 1070 paddr = PXA2X0_BTUART_BASE; 1071 ckenreg |= CKEN_BTUART; 1072 } 1073 1074 if (paddr && 1075 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1076 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1077 1078 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1079 } 1080 #endif 1081 } 1082 #endif 1083 1084 #if 0 1085 /* 1086 * display a number in hex LED. 1087 * a digit is blank when the corresponding bit in arg blank is 1 1088 */ 1089 unsigned short led_control_value = 0; 1090 1091 void 1092 hex_led_blank(uint32_t value, int blank) 1093 { 1094 int save = disable_interrupts(I32_bit); 1095 1096 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1097 led_control_value = (led_control_value & 0xff) 1098 | ((blank & 0xff)<<8); 1099 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1100 restore_interrupts(save); 1101 } 1102 #endif 1103
Indexes created Thu Oct 23 22:10:10 GMT 2025