lubbock_machdep.c revision 1.17.6.2
1 /* $NetBSD: lubbock_machdep.c,v 1.17.6.2 2009/01/17 13:27:58 mjf 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 dependant 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 dependant 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 1.17.6.2 2009/01/17 13:27:58 mjf 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 "md.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> 135 136 #include <uvm/uvm_extern.h> 137 138 #include <sys/conf.h> 139 #include <dev/cons.h> 140 #include <dev/md.h> 141 #include <dev/ic/smc91cxxreg.h> 142 143 #include <machine/db_machdep.h> 144 #include <ddb/db_sym.h> 145 #include <ddb/db_extern.h> 146 #ifdef KGDB 147 #include <sys/kgdb.h> 148 #endif 149 150 #include <machine/bootconfig.h> 151 #include <machine/bus.h> 152 #include <machine/cpu.h> 153 #include <machine/frame.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 174 175 176 /* 177 * Address to call from cpu_reset() to reset the machine. 178 * This is machine architecture dependant as it varies depending 179 * on where the ROM appears when you turn the MMU off. 180 */ 181 182 u_int cpu_reset_address = 0; 183 184 /* Define various stack sizes in pages */ 185 #define IRQ_STACK_SIZE 1 186 #define ABT_STACK_SIZE 1 187 #define UND_STACK_SIZE 1 188 189 BootConfig bootconfig; /* Boot config storage */ 190 char *boot_args = NULL; 191 char *boot_file = NULL; 192 193 vm_offset_t physical_start; 194 vm_offset_t physical_freestart; 195 vm_offset_t physical_freeend; 196 vm_offset_t physical_end; 197 u_int free_pages; 198 vm_offset_t pagetables_start; 199 int physmem = 0; 200 201 /*int debug_flags;*/ 202 #ifndef PMAP_STATIC_L1S 203 int max_processes = 64; /* Default number */ 204 #endif /* !PMAP_STATIC_L1S */ 205 206 /* Physical and virtual addresses for some global pages */ 207 pv_addr_t systempage; 208 pv_addr_t irqstack; 209 pv_addr_t undstack; 210 pv_addr_t abtstack; 211 pv_addr_t kernelstack; 212 pv_addr_t minidataclean; 213 214 vm_offset_t msgbufphys; 215 216 extern u_int data_abort_handler_address; 217 extern u_int prefetch_abort_handler_address; 218 extern u_int undefined_handler_address; 219 220 #ifdef PMAP_DEBUG 221 extern int pmap_debug_level; 222 #endif 223 224 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 225 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 226 #define KERNEL_PT_KERNEL_NUM 4 227 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 228 /* Page tables for mapping kernel VM */ 229 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 230 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 231 232 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 233 234 struct user *proc0paddr; 235 236 /* Prototypes */ 237 238 #if 0 239 void process_kernel_args(char *); 240 #endif 241 242 void consinit(void); 243 void kgdb_port_init(void); 244 void change_clock(uint32_t v); 245 246 bs_protos(bs_notimpl); 247 248 #include "com.h" 249 #if NCOM > 0 250 #include <dev/ic/comreg.h> 251 #include <dev/ic/comvar.h> 252 #endif 253 254 #ifndef CONSPEED 255 #define CONSPEED B115200 /* What RedBoot uses */ 256 #endif 257 #ifndef CONMODE 258 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 259 #endif 260 261 int comcnspeed = CONSPEED; 262 int comcnmode = CONMODE; 263 264 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 265 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 266 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 267 268 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 269 270 { -1 } 271 }; 272 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 273 pxa25x_com_btuart_gpioconf, 274 pxa25x_com_ffuart_gpioconf, 275 #if 0 276 pxa25x_com_stuart_gpioconf, 277 #endif 278 pxa25x_pcic_gpioconf, 279 pxa25x_pxaacu_gpioconf, 280 boarddep_gpioconf, 281 NULL 282 }; 283 284 /* 285 * void cpu_reboot(int howto, char *bootstr) 286 * 287 * Reboots the system 288 * 289 * Deal with any syncing, unmounting, dumping and shutdown hooks, 290 * then reset the CPU. 291 */ 292 void 293 cpu_reboot(int howto, char *bootstr) 294 { 295 #ifdef DIAGNOSTIC 296 /* info */ 297 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 298 #endif 299 300 /* 301 * If we are still cold then hit the air brakes 302 * and crash to earth fast 303 */ 304 if (cold) { 305 doshutdownhooks(); 306 pmf_system_shutdown(boothowto); 307 printf("The operating system has halted.\n"); 308 printf("Please press any key to reboot.\n\n"); 309 cngetc(); 310 printf("rebooting...\n"); 311 cpu_reset(); 312 /*NOTREACHED*/ 313 } 314 315 /* Disable console buffering */ 316 /* cnpollc(1);*/ 317 318 /* 319 * If RB_NOSYNC was not specified sync the discs. 320 * Note: Unless cold is set to 1 here, syslogd will die during the 321 * unmount. It looks like syslogd is getting woken up only to find 322 * that it cannot page part of the binary in as the filesystem has 323 * been unmounted. 324 */ 325 if (!(howto & RB_NOSYNC)) 326 bootsync(); 327 328 /* Say NO to interrupts */ 329 splhigh(); 330 331 /* Do a dump if requested. */ 332 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 333 dumpsys(); 334 335 /* Run any shutdown hooks */ 336 doshutdownhooks(); 337 338 pmf_system_shutdown(boothowto); 339 340 /* Make sure IRQ's are disabled */ 341 IRQdisable; 342 343 if (howto & RB_HALT) { 344 printf("The operating system has halted.\n"); 345 printf("Please press any key to reboot.\n\n"); 346 cngetc(); 347 } 348 349 printf("rebooting...\n"); 350 cpu_reset(); 351 /*NOTREACHED*/ 352 } 353 354 static inline 355 pd_entry_t * 356 read_ttb(void) 357 { 358 long ttb; 359 360 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 361 362 363 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 364 } 365 366 /* 367 * Static device mappings. These peripheral registers are mapped at 368 * fixed virtual addresses very early in initarm() so that we can use 369 * them while booting the kernel, and stay at the same address 370 * throughout whole kernel's life time. 371 * 372 * We use this table twice; once with bootstrap page table, and once 373 * with kernel's page table which we build up in initarm(). 374 * 375 * Since we map these registers into the bootstrap page table using 376 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 377 * registers segment-aligned and segment-rounded in order to avoid 378 * using the 2nd page tables. 379 */ 380 381 #define _A(a) ((a) & ~L1_S_OFFSET) 382 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 383 384 static const struct pmap_devmap lubbock_devmap[] = { 385 { 386 LUBBOCK_OBIO_VBASE, 387 _A(LUBBOCK_OBIO_PBASE), 388 _S(LUBBOCK_OBIO_SIZE), 389 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 390 }, 391 { 392 LUBBOCK_GPIO_VBASE, 393 _A(PXA2X0_GPIO_BASE), 394 _S(PXA250_GPIO_SIZE), 395 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 396 }, 397 { 398 LUBBOCK_CLKMAN_VBASE, 399 _A(PXA2X0_CLKMAN_BASE), 400 _S(PXA2X0_CLKMAN_SIZE), 401 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 402 }, 403 { 404 LUBBOCK_INTCTL_VBASE, 405 _A(PXA2X0_INTCTL_BASE), 406 _S(PXA2X0_INTCTL_SIZE), 407 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 408 }, 409 { 410 LUBBOCK_FFUART_VBASE, 411 _A(PXA2X0_FFUART_BASE), 412 _S(4 * COM_NPORTS), 413 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 414 }, 415 { 416 LUBBOCK_BTUART_VBASE, 417 _A(PXA2X0_BTUART_BASE), 418 _S(4 * COM_NPORTS), 419 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 420 }, 421 422 {0, 0, 0, 0,} 423 }; 424 425 #undef _A 426 #undef _S 427 428 /* 429 * u_int initarm(...) 430 * 431 * Initial entry point on startup. This gets called before main() is 432 * entered. 433 * It should be responsible for setting up everything that must be 434 * in place when main is called. 435 * This includes 436 * Taking a copy of the boot configuration structure. 437 * Initialising the physical console so characters can be printed. 438 * Setting up page tables for the kernel 439 * Relocating the kernel to the bottom of physical memory 440 */ 441 u_int 442 initarm(void *arg) 443 { 444 extern vaddr_t xscale_cache_clean_addr; 445 int loop; 446 int loop1; 447 u_int l1pagetable; 448 paddr_t memstart; 449 psize_t memsize; 450 int led_data = 0; 451 #ifdef DIAGNOSTIC 452 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 453 #endif 454 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 455 #define LEDSTEP() hex_led(led_data++) 456 457 /* use physical address until pagetable is set */ 458 LEDSTEP_P(); 459 460 /* map some peripheral registers at static I/O area */ 461 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 462 463 LEDSTEP_P(); 464 465 /* start 32.768 kHz OSC */ 466 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 467 /* Get ready for splfoo() */ 468 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 469 470 LEDSTEP(); 471 472 /* 473 * Heads up ... Setup the CPU / MMU / TLB functions 474 */ 475 if (set_cpufuncs()) 476 panic("cpu not recognized!"); 477 478 LEDSTEP(); 479 480 481 #if 0 482 /* Calibrate the delay loop. */ 483 #endif 484 485 /* 486 * Okay, RedBoot has provided us with the following memory map: 487 * 488 * Physical Address Range Description 489 * ----------------------- ---------------------------------- 490 * 0x00000000 - 0x01ffffff flash Memory (32MB) 491 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 492 * 0x08000000 - 0x080000ff I/O baseboard registers 493 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 494 * 0x0c000000 - 0x0c0fffff Ethernet Controller 495 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 496 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 497 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 498 * 0x40000000 - 0x480fffff Processor Registers 499 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 500 * 501 * 502 * Virtual Address Range X C B Description 503 * ----------------------- - - - ---------------------------------- 504 * 0x00000000 - 0x00003fff N Y Y SDRAM 505 * 0x00004000 - 0x000fffff N Y N Boot ROM 506 * 0x00100000 - 0x01ffffff N N N Application Flash 507 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 508 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 509 * 0x0a000000 - 0x0a0fffff N N N SRAM 510 * 0x40000000 - 0x480fffff N N N Processor Registers 511 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 512 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 513 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 514 * (done by this routine) 515 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 516 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 517 * 0xfd400000 - 0xfd4fffff N N N FF-UART 518 * 0xfd500000 - 0xfd5fffff N N N BT-UART 519 * 520 * RedBoot's first level page table is at 0xa0004000. There 521 * are also 2 second-level tables at 0xa0008000 and 522 * 0xa0008400. We will continue to use them until we switch to 523 * our pagetable by setttb(). 524 * 525 */ 526 527 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 528 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 529 pxa2x0_gpio_config(lubbock_gpioconf); 530 531 /* turn on clock to UART block. 532 XXX: this should not be done here. */ 533 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 534 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 535 536 LEDSTEP(); 537 538 consinit(); 539 LEDSTEP(); 540 #ifdef KGDB 541 kgdb_port_init(); 542 LEDSTEP(); 543 #endif 544 545 546 /* Talk to the user */ 547 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 548 549 /* Tweak memory controller */ 550 { 551 /* Modify access timing for CS3 (91c96) */ 552 553 uint32_t tmp = 554 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 555 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 556 (tmp & 0xffff) | (0x3881<<16)); 557 /* RRR=3, RDN=8, RDF=8 558 * XXX: can be faster? 559 */ 560 } 561 562 563 /* Initialize for PCMCIA/CF sockets */ 564 { 565 uint32_t tmp; 566 567 /* Activate two sockets. 568 XXX: This code segment should be moved to 569 pcmcia MD attach routine. 570 XXX: These bits should be toggled based on 571 existene of PCMCIA/CF cards 572 */ 573 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 574 MECR_NOS|MECR_CIT); 575 576 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 577 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 578 (tmp & ~(1<<4)) | (1<<0)); 579 } 580 581 #if 0 582 /* 583 * Examine the boot args string for options we need to know about 584 * now. 585 */ 586 process_kernel_args((char *)nwbootinfo.bt_args); 587 #endif 588 589 { 590 int processor_card_id; 591 592 processor_card_id = 0x000f & 593 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 594 switch(processor_card_id){ 595 case 0: 596 /* Cotulla */ 597 memstart = 0xa0000000; 598 memsize = 0x04000000; /* 64MB */ 599 break; 600 case 1: 601 /* XXX: Sabiani */ 602 memstart = 0xa0000000; 603 memsize = 0x04000000; /* 64MB */ 604 break; 605 default: 606 /* XXX: Unknown */ 607 memstart = 0xa0000000; 608 memsize = 0x04000000; /* 64MB */ 609 } 610 } 611 612 printf("initarm: Configuring system ...\n"); 613 614 /* Fake bootconfig structure for the benefit of pmap.c */ 615 /* XXX must make the memory description h/w independent */ 616 bootconfig.dramblocks = 1; 617 bootconfig.dram[0].address = memstart; 618 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 619 620 /* 621 * Set up the variables that define the availablilty of 622 * physical memory. For now, we're going to set 623 * physical_freestart to 0xa0200000 (where the kernel 624 * was loaded), and allocate the memory we need downwards. 625 * If we get too close to the page tables that RedBoot 626 * set up, we will panic. We will update physical_freestart 627 * and physical_freeend later to reflect what pmap_bootstrap() 628 * wants to see. 629 * 630 * XXX pmap_bootstrap() needs an enema. 631 */ 632 physical_start = bootconfig.dram[0].address; 633 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 634 635 physical_freestart = 0xa0009000UL; 636 physical_freeend = 0xa0200000UL; 637 638 physmem = (physical_end - physical_start) / PAGE_SIZE; 639 640 #ifdef VERBOSE_INIT_ARM 641 /* Tell the user about the memory */ 642 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 643 physical_start, physical_end - 1); 644 #endif 645 646 /* 647 * Okay, the kernel starts 2MB in from the bottom of physical 648 * memory. We are going to allocate our bootstrap pages downwards 649 * from there. 650 * 651 * We need to allocate some fixed page tables to get the kernel 652 * going. We allocate one page directory and a number of page 653 * tables and store the physical addresses in the kernel_pt_table 654 * array. 655 * 656 * The kernel page directory must be on a 16K boundary. The page 657 * tables must be on 4K boundaries. What we do is allocate the 658 * page directory on the first 16K boundary that we encounter, and 659 * the page tables on 4K boundaries otherwise. Since we allocate 660 * at least 3 L2 page tables, we are guaranteed to encounter at 661 * least one 16K aligned region. 662 */ 663 664 #ifdef VERBOSE_INIT_ARM 665 printf("Allocating page tables\n"); 666 #endif 667 668 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 669 670 #ifdef VERBOSE_INIT_ARM 671 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 672 physical_freestart, free_pages, free_pages); 673 #endif 674 675 /* Define a macro to simplify memory allocation */ 676 #define valloc_pages(var, np) \ 677 alloc_pages((var).pv_pa, (np)); \ 678 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 679 680 #define alloc_pages(var, np) \ 681 physical_freeend -= ((np) * PAGE_SIZE); \ 682 if (physical_freeend < physical_freestart) \ 683 panic("initarm: out of memory"); \ 684 (var) = physical_freeend; \ 685 free_pages -= (np); \ 686 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 687 688 loop1 = 0; 689 kernel_l1pt.pv_pa = 0; 690 kernel_l1pt.pv_va = 0; 691 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 692 /* Are we 16KB aligned for an L1 ? */ 693 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 694 && kernel_l1pt.pv_pa == 0) { 695 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 696 } else { 697 valloc_pages(kernel_pt_table[loop1], 698 L2_TABLE_SIZE / PAGE_SIZE); 699 ++loop1; 700 } 701 } 702 703 /* This should never be able to happen but better confirm that. */ 704 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 705 panic("initarm: Failed to align the kernel page directory"); 706 707 LEDSTEP(); 708 709 /* 710 * Allocate a page for the system page mapped to V0x00000000 711 * This page will just contain the system vectors and can be 712 * shared by all processes. 713 */ 714 alloc_pages(systempage.pv_pa, 1); 715 716 /* Allocate stacks for all modes */ 717 valloc_pages(irqstack, IRQ_STACK_SIZE); 718 valloc_pages(abtstack, ABT_STACK_SIZE); 719 valloc_pages(undstack, UND_STACK_SIZE); 720 valloc_pages(kernelstack, UPAGES); 721 722 /* Allocate enough pages for cleaning the Mini-Data cache. */ 723 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 724 valloc_pages(minidataclean, 1); 725 726 #ifdef VERBOSE_INIT_ARM 727 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 728 irqstack.pv_va); 729 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 730 abtstack.pv_va); 731 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 732 undstack.pv_va); 733 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 734 kernelstack.pv_va); 735 #endif 736 737 /* 738 * XXX Defer this to later so that we can reclaim the memory 739 * XXX used by the RedBoot page tables. 740 */ 741 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 742 743 /* 744 * Ok we have allocated physical pages for the primary kernel 745 * page tables 746 */ 747 748 #ifdef VERBOSE_INIT_ARM 749 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 750 #endif 751 752 /* 753 * Now we start construction of the L1 page table 754 * We start by mapping the L2 page tables into the L1. 755 * This means that we can replace L1 mappings later on if necessary 756 */ 757 l1pagetable = kernel_l1pt.pv_pa; 758 759 /* Map the L2 pages tables in the L1 page table */ 760 pmap_link_l2pt(l1pagetable, 0x00000000, 761 &kernel_pt_table[KERNEL_PT_SYS]); 762 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 763 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 764 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 765 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 766 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 767 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 768 769 /* update the top of the kernel VM */ 770 pmap_curmaxkvaddr = 771 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 772 773 #ifdef VERBOSE_INIT_ARM 774 printf("Mapping kernel\n"); 775 #endif 776 777 /* Now we fill in the L2 pagetable for the kernel static code/data */ 778 { 779 extern char etext[], _end[]; 780 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 781 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 782 u_int logical; 783 784 textsize = (textsize + PGOFSET) & ~PGOFSET; 785 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 786 787 logical = 0x00200000; /* offset of kernel in RAM */ 788 789 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 790 physical_start + logical, textsize, 791 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 792 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 793 physical_start + logical, totalsize - textsize, 794 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 795 } 796 797 #ifdef VERBOSE_INIT_ARM 798 printf("Constructing L2 page tables\n"); 799 #endif 800 801 /* Map the stack pages */ 802 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 803 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 804 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 805 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 806 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 807 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 808 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 809 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 810 811 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 812 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 813 814 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 815 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 816 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 817 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 818 } 819 820 /* Map the Mini-Data cache clean area. */ 821 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 822 minidataclean.pv_pa); 823 824 /* Map the vector page. */ 825 #if 1 826 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 827 * cache-clean code there. */ 828 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 829 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 830 #else 831 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 832 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 833 #endif 834 835 /* 836 * map integrated peripherals at same address in l1pagetable 837 * so that we can continue to use console. 838 */ 839 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 840 841 /* 842 * Give the XScale global cache clean code an appropriately 843 * sized chunk of unmapped VA space starting at 0xff000000 844 * (our device mappings end before this address). 845 */ 846 xscale_cache_clean_addr = 0xff000000U; 847 848 /* 849 * Now we have the real page tables in place so we can switch to them. 850 * Once this is done we will be running with the REAL kernel page 851 * tables. 852 */ 853 854 /* 855 * Update the physical_freestart/physical_freeend/free_pages 856 * variables. 857 */ 858 { 859 extern char _end[]; 860 861 physical_freestart = physical_start + 862 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 863 KERNEL_BASE); 864 physical_freeend = physical_end; 865 free_pages = 866 (physical_freeend - physical_freestart) / PAGE_SIZE; 867 } 868 869 /* Switch tables */ 870 #ifdef VERBOSE_INIT_ARM 871 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 872 physical_freestart, free_pages, free_pages); 873 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 874 #endif 875 876 LEDSTEP(); 877 878 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 879 setttb(kernel_l1pt.pv_pa); 880 cpu_tlb_flushID(); 881 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 882 LEDSTEP(); 883 884 /* 885 * Moved from cpu_startup() as data_abort_handler() references 886 * this during uvm init 887 */ 888 proc0paddr = (struct user *)kernelstack.pv_va; 889 lwp0.l_addr = proc0paddr; 890 891 #ifdef VERBOSE_INIT_ARM 892 printf("bootstrap done.\n"); 893 #endif 894 895 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 896 897 /* 898 * Pages were allocated during the secondary bootstrap for the 899 * stacks for different CPU modes. 900 * We must now set the r13 registers in the different CPU modes to 901 * point to these stacks. 902 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 903 * of the stack memory. 904 */ 905 printf("init subsystems: stacks "); 906 907 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 908 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 909 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 910 911 /* 912 * Well we should set a data abort handler. 913 * Once things get going this will change as we will need a proper 914 * handler. 915 * Until then we will use a handler that just panics but tells us 916 * why. 917 * Initialisation of the vectors will just panic on a data abort. 918 * This just fills in a slightly better one. 919 */ 920 printf("vectors "); 921 data_abort_handler_address = (u_int)data_abort_handler; 922 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 923 undefined_handler_address = (u_int)undefinedinstruction_bounce; 924 925 /* Initialise the undefined instruction handlers */ 926 printf("undefined "); 927 undefined_init(); 928 929 /* Load memory into UVM. */ 930 printf("page "); 931 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 932 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 933 atop(physical_freestart), atop(physical_freeend), 934 VM_FREELIST_DEFAULT); 935 936 /* Boot strap pmap telling it where the kernel page table is */ 937 printf("pmap "); 938 LEDSTEP(); 939 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 940 LEDSTEP(); 941 942 #ifdef __HAVE_MEMORY_DISK__ 943 md_root_setconf(memory_disk, sizeof memory_disk); 944 #endif 945 946 { 947 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 948 949 if (0 == (sw & (1<<13))) /* check S19 */ 950 boothowto |= RB_KDB; 951 if (0 == (sw & (1<<12))) /* S20 */ 952 boothowto |= RB_SINGLE; 953 } 954 955 LEDSTEP(); 956 957 #ifdef KGDB 958 if (boothowto & RB_KDB) { 959 kgdb_debug_init = 1; 960 kgdb_connect(1); 961 } 962 #endif 963 964 #ifdef DDB 965 db_machine_init(); 966 967 /* Firmware doesn't load symbols. */ 968 ddb_init(0, NULL, NULL); 969 970 if (boothowto & RB_KDB) 971 Debugger(); 972 #endif 973 974 /* We return the new stack pointer address */ 975 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 976 } 977 978 #if 0 979 void 980 process_kernel_args(char *args) 981 { 982 983 boothowto = 0; 984 985 /* Make a local copy of the bootargs */ 986 strncpy(bootargs, args, MAX_BOOT_STRING); 987 988 args = bootargs; 989 boot_file = bootargs; 990 991 /* Skip the kernel image filename */ 992 while (*args != ' ' && *args != 0) 993 ++args; 994 995 if (*args != 0) 996 *args++ = 0; 997 998 while (*args == ' ') 999 ++args; 1000 1001 boot_args = args; 1002 1003 printf("bootfile: %s\n", boot_file); 1004 printf("bootargs: %s\n", boot_args); 1005 1006 parse_mi_bootargs(boot_args); 1007 } 1008 #endif 1009 1010 #ifdef KGDB 1011 #ifndef KGDB_DEVNAME 1012 #define KGDB_DEVNAME "ffuart" 1013 #endif 1014 const char kgdb_devname[] = KGDB_DEVNAME; 1015 1016 #if (NCOM > 0) 1017 #ifndef KGDB_DEVMODE 1018 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 1019 #endif 1020 int comkgdbmode = KGDB_DEVMODE; 1021 #endif /* NCOM */ 1022 1023 #endif /* KGDB */ 1024 1025 1026 void 1027 consinit(void) 1028 { 1029 static int consinit_called = 0; 1030 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1031 #if 0 1032 char *console = CONSDEVNAME; 1033 #endif 1034 1035 if (consinit_called != 0) 1036 return; 1037 1038 consinit_called = 1; 1039 1040 #if NCOM > 0 1041 1042 #ifdef FFUARTCONSOLE 1043 /* Check switch. */ 1044 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1045 /* We don't use FF serial when S17=no-dot position */ 1046 } 1047 #ifdef KGDB 1048 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1049 /* port is reserved for kgdb */ 1050 } 1051 #endif 1052 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1053 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1054 #if 0 1055 /* XXX: can't call pxa2x0_clkman_config yet */ 1056 pxa2x0_clkman_config(CKEN_FFUART, 1); 1057 #else 1058 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1059 ckenreg|CKEN_FFUART); 1060 #endif 1061 1062 return; 1063 } 1064 #endif /* FFUARTCONSOLE */ 1065 1066 #ifdef BTUARTCONSOLE 1067 #ifdef KGDB 1068 if (0 == strcmp(kgdb_devname, "btuart")) { 1069 /* port is reserved for kgdb */ 1070 } else 1071 #endif 1072 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1073 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1074 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1075 ckenreg|CKEN_BTUART); 1076 return; 1077 } 1078 #endif /* BTUARTCONSOLE */ 1079 1080 1081 #endif /* NCOM */ 1082 1083 } 1084 1085 #ifdef KGDB 1086 void 1087 kgdb_port_init(void) 1088 { 1089 #if (NCOM > 0) && defined(COM_PXA2X0) 1090 paddr_t paddr = 0; 1091 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1092 1093 if (0 == strcmp(kgdb_devname, "ffuart")) { 1094 paddr = PXA2X0_FFUART_BASE; 1095 ckenreg |= CKEN_FFUART; 1096 } 1097 else if (0 == strcmp(kgdb_devname, "btuart")) { 1098 paddr = PXA2X0_BTUART_BASE; 1099 ckenreg |= CKEN_BTUART; 1100 } 1101 1102 if (paddr && 1103 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1104 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1105 1106 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1107 } 1108 #endif 1109 } 1110 #endif 1111 1112 #if 0 1113 /* 1114 * display a number in hex LED. 1115 * a digit is blank when the corresponding bit in arg blank is 1 1116 */ 1117 unsigned short led_control_value = 0; 1118 1119 void 1120 hex_led_blank(uint32_t value, int blank) 1121 { 1122 int save = disable_interrupts(I32_bit); 1123 1124 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1125 led_control_value = (led_control_value & 0xff) 1126 | ((blank & 0xff)<<8); 1127 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1128 restore_interrupts(save); 1129 } 1130 #endif 1131
Indexes created Wed Oct 22 13:09:56 GMT 2025