lubbock_machdep.c revision 1.29
1 /* $NetBSD: lubbock_machdep.c,v 1.29 2012/07/29 00:07:08 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 1.29 2012/07/29 00:07:08 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 173 174 175 /* 176 * Address to call from cpu_reset() to reset the machine. 177 * This is machine architecture dependent as it varies depending 178 * on where the ROM appears when you turn the MMU off. 179 */ 180 181 u_int cpu_reset_address = 0; 182 183 /* Define various stack sizes in pages */ 184 #define IRQ_STACK_SIZE 1 185 #define ABT_STACK_SIZE 1 186 #define UND_STACK_SIZE 1 187 188 BootConfig bootconfig; /* Boot config storage */ 189 char *boot_args = NULL; 190 char *boot_file = NULL; 191 192 vm_offset_t physical_start; 193 vm_offset_t physical_freestart; 194 vm_offset_t physical_freeend; 195 vm_offset_t physical_end; 196 u_int free_pages; 197 198 /*int debug_flags;*/ 199 #ifndef PMAP_STATIC_L1S 200 int max_processes = 64; /* Default number */ 201 #endif /* !PMAP_STATIC_L1S */ 202 203 /* Physical and virtual addresses for some global pages */ 204 pv_addr_t minidataclean; 205 206 vm_offset_t msgbufphys; 207 208 #ifdef PMAP_DEBUG 209 extern int pmap_debug_level; 210 #endif 211 212 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 213 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 214 #define KERNEL_PT_KERNEL_NUM 4 215 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 216 /* Page tables for mapping kernel VM */ 217 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 218 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 219 220 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 221 222 /* Prototypes */ 223 224 #if 0 225 void process_kernel_args(char *); 226 #endif 227 228 void consinit(void); 229 void kgdb_port_init(void); 230 void change_clock(uint32_t v); 231 232 bs_protos(bs_notimpl); 233 234 #include "com.h" 235 #if NCOM > 0 236 #include <dev/ic/comreg.h> 237 #include <dev/ic/comvar.h> 238 #endif 239 240 #ifndef CONSPEED 241 #define CONSPEED B115200 /* What RedBoot uses */ 242 #endif 243 #ifndef CONMODE 244 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 245 #endif 246 247 int comcnspeed = CONSPEED; 248 int comcnmode = CONMODE; 249 250 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 251 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 252 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 253 254 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 255 256 { -1 } 257 }; 258 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 259 pxa25x_com_btuart_gpioconf, 260 pxa25x_com_ffuart_gpioconf, 261 #if 0 262 pxa25x_com_stuart_gpioconf, 263 #endif 264 pxa25x_pcic_gpioconf, 265 pxa25x_pxaacu_gpioconf, 266 boarddep_gpioconf, 267 NULL 268 }; 269 270 /* 271 * void cpu_reboot(int howto, char *bootstr) 272 * 273 * Reboots the system 274 * 275 * Deal with any syncing, unmounting, dumping and shutdown hooks, 276 * then reset the CPU. 277 */ 278 void 279 cpu_reboot(int howto, char *bootstr) 280 { 281 #ifdef DIAGNOSTIC 282 /* info */ 283 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 284 #endif 285 286 /* 287 * If we are still cold then hit the air brakes 288 * and crash to earth fast 289 */ 290 if (cold) { 291 doshutdownhooks(); 292 pmf_system_shutdown(boothowto); 293 printf("The operating system has halted.\n"); 294 printf("Please press any key to reboot.\n\n"); 295 cngetc(); 296 printf("rebooting...\n"); 297 cpu_reset(); 298 /*NOTREACHED*/ 299 } 300 301 /* Disable console buffering */ 302 /* cnpollc(1);*/ 303 304 /* 305 * If RB_NOSYNC was not specified sync the discs. 306 * Note: Unless cold is set to 1 here, syslogd will die during the 307 * unmount. It looks like syslogd is getting woken up only to find 308 * that it cannot page part of the binary in as the filesystem has 309 * been unmounted. 310 */ 311 if (!(howto & RB_NOSYNC)) 312 bootsync(); 313 314 /* Say NO to interrupts */ 315 splhigh(); 316 317 /* Do a dump if requested. */ 318 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 319 dumpsys(); 320 321 /* Run any shutdown hooks */ 322 doshutdownhooks(); 323 324 pmf_system_shutdown(boothowto); 325 326 /* Make sure IRQ's are disabled */ 327 IRQdisable; 328 329 if (howto & RB_HALT) { 330 printf("The operating system has halted.\n"); 331 printf("Please press any key to reboot.\n\n"); 332 cngetc(); 333 } 334 335 printf("rebooting...\n"); 336 cpu_reset(); 337 /*NOTREACHED*/ 338 } 339 340 static inline 341 pd_entry_t * 342 read_ttb(void) 343 { 344 long ttb; 345 346 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 347 348 349 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 350 } 351 352 /* 353 * Static device mappings. These peripheral registers are mapped at 354 * fixed virtual addresses very early in initarm() so that we can use 355 * them while booting the kernel, and stay at the same address 356 * throughout whole kernel's life time. 357 * 358 * We use this table twice; once with bootstrap page table, and once 359 * with kernel's page table which we build up in initarm(). 360 * 361 * Since we map these registers into the bootstrap page table using 362 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 363 * registers segment-aligned and segment-rounded in order to avoid 364 * using the 2nd page tables. 365 */ 366 367 #define _A(a) ((a) & ~L1_S_OFFSET) 368 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 369 370 static const struct pmap_devmap lubbock_devmap[] = { 371 { 372 LUBBOCK_OBIO_VBASE, 373 _A(LUBBOCK_OBIO_PBASE), 374 _S(LUBBOCK_OBIO_SIZE), 375 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 376 }, 377 { 378 LUBBOCK_GPIO_VBASE, 379 _A(PXA2X0_GPIO_BASE), 380 _S(PXA250_GPIO_SIZE), 381 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 382 }, 383 { 384 LUBBOCK_CLKMAN_VBASE, 385 _A(PXA2X0_CLKMAN_BASE), 386 _S(PXA2X0_CLKMAN_SIZE), 387 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 388 }, 389 { 390 LUBBOCK_INTCTL_VBASE, 391 _A(PXA2X0_INTCTL_BASE), 392 _S(PXA2X0_INTCTL_SIZE), 393 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 394 }, 395 { 396 LUBBOCK_FFUART_VBASE, 397 _A(PXA2X0_FFUART_BASE), 398 _S(4 * COM_NPORTS), 399 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 400 }, 401 { 402 LUBBOCK_BTUART_VBASE, 403 _A(PXA2X0_BTUART_BASE), 404 _S(4 * COM_NPORTS), 405 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 406 }, 407 408 {0, 0, 0, 0,} 409 }; 410 411 #undef _A 412 #undef _S 413 414 /* 415 * u_int initarm(...) 416 * 417 * Initial entry point on startup. This gets called before main() is 418 * entered. 419 * It should be responsible for setting up everything that must be 420 * in place when main is called. 421 * This includes 422 * Taking a copy of the boot configuration structure. 423 * Initialising the physical console so characters can be printed. 424 * Setting up page tables for the kernel 425 * Relocating the kernel to the bottom of physical memory 426 */ 427 u_int 428 initarm(void *arg) 429 { 430 extern vaddr_t xscale_cache_clean_addr; 431 int loop; 432 int loop1; 433 u_int l1pagetable; 434 paddr_t memstart; 435 psize_t memsize; 436 int led_data = 0; 437 #ifdef DIAGNOSTIC 438 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 439 #endif 440 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 441 #define LEDSTEP() hex_led(led_data++) 442 443 /* use physical address until pagetable is set */ 444 LEDSTEP_P(); 445 446 /* map some peripheral registers at static I/O area */ 447 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 448 449 LEDSTEP_P(); 450 451 /* start 32.768 kHz OSC */ 452 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 453 /* Get ready for splfoo() */ 454 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 455 456 LEDSTEP(); 457 458 /* 459 * Heads up ... Setup the CPU / MMU / TLB functions 460 */ 461 if (set_cpufuncs()) 462 panic("cpu not recognized!"); 463 464 LEDSTEP(); 465 466 467 #if 0 468 /* Calibrate the delay loop. */ 469 #endif 470 471 /* 472 * Okay, RedBoot has provided us with the following memory map: 473 * 474 * Physical Address Range Description 475 * ----------------------- ---------------------------------- 476 * 0x00000000 - 0x01ffffff flash Memory (32MB) 477 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 478 * 0x08000000 - 0x080000ff I/O baseboard registers 479 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 480 * 0x0c000000 - 0x0c0fffff Ethernet Controller 481 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 482 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 483 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 484 * 0x40000000 - 0x480fffff Processor Registers 485 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 486 * 487 * 488 * Virtual Address Range X C B Description 489 * ----------------------- - - - ---------------------------------- 490 * 0x00000000 - 0x00003fff N Y Y SDRAM 491 * 0x00004000 - 0x000fffff N Y N Boot ROM 492 * 0x00100000 - 0x01ffffff N N N Application Flash 493 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 494 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 495 * 0x0a000000 - 0x0a0fffff N N N SRAM 496 * 0x40000000 - 0x480fffff N N N Processor Registers 497 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 498 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 499 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 500 * (done by this routine) 501 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 502 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 503 * 0xfd400000 - 0xfd4fffff N N N FF-UART 504 * 0xfd500000 - 0xfd5fffff N N N BT-UART 505 * 506 * RedBoot's first level page table is at 0xa0004000. There 507 * are also 2 second-level tables at 0xa0008000 and 508 * 0xa0008400. We will continue to use them until we switch to 509 * our pagetable by cpu_setttb(). 510 * 511 */ 512 513 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 514 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 515 pxa2x0_gpio_config(lubbock_gpioconf); 516 517 /* turn on clock to UART block. 518 XXX: this should not be done here. */ 519 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 520 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 521 522 LEDSTEP(); 523 524 consinit(); 525 LEDSTEP(); 526 #ifdef KGDB 527 kgdb_port_init(); 528 LEDSTEP(); 529 #endif 530 531 532 /* Talk to the user */ 533 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 534 535 /* Tweak memory controller */ 536 { 537 /* Modify access timing for CS3 (91c96) */ 538 539 uint32_t tmp = 540 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 541 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 542 (tmp & 0xffff) | (0x3881<<16)); 543 /* RRR=3, RDN=8, RDF=8 544 * XXX: can be faster? 545 */ 546 } 547 548 549 /* Initialize for PCMCIA/CF sockets */ 550 { 551 uint32_t tmp; 552 553 /* Activate two sockets. 554 XXX: This code segment should be moved to 555 pcmcia MD attach routine. 556 XXX: These bits should be toggled based on 557 existene of PCMCIA/CF cards 558 */ 559 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 560 MECR_NOS|MECR_CIT); 561 562 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 563 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 564 (tmp & ~(1<<4)) | (1<<0)); 565 } 566 567 #if 0 568 /* 569 * Examine the boot args string for options we need to know about 570 * now. 571 */ 572 process_kernel_args((char *)nwbootinfo.bt_args); 573 #endif 574 575 { 576 int processor_card_id; 577 578 processor_card_id = 0x000f & 579 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 580 switch(processor_card_id){ 581 case 0: 582 /* Cotulla */ 583 memstart = 0xa0000000; 584 memsize = 0x04000000; /* 64MB */ 585 break; 586 case 1: 587 /* XXX: Sabiani */ 588 memstart = 0xa0000000; 589 memsize = 0x04000000; /* 64MB */ 590 break; 591 default: 592 /* XXX: Unknown */ 593 memstart = 0xa0000000; 594 memsize = 0x04000000; /* 64MB */ 595 } 596 } 597 598 printf("initarm: Configuring system ...\n"); 599 600 /* Fake bootconfig structure for the benefit of pmap.c */ 601 /* XXX must make the memory description h/w independent */ 602 bootconfig.dramblocks = 1; 603 bootconfig.dram[0].address = memstart; 604 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 605 606 /* 607 * Set up the variables that define the availablilty of 608 * physical memory. For now, we're going to set 609 * physical_freestart to 0xa0200000 (where the kernel 610 * was loaded), and allocate the memory we need downwards. 611 * If we get too close to the page tables that RedBoot 612 * set up, we will panic. We will update physical_freestart 613 * and physical_freeend later to reflect what pmap_bootstrap() 614 * wants to see. 615 * 616 * XXX pmap_bootstrap() needs an enema. 617 */ 618 physical_start = bootconfig.dram[0].address; 619 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 620 621 physical_freestart = 0xa0009000UL; 622 physical_freeend = 0xa0200000UL; 623 624 physmem = (physical_end - physical_start) / PAGE_SIZE; 625 626 #ifdef VERBOSE_INIT_ARM 627 /* Tell the user about the memory */ 628 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 629 physical_start, physical_end - 1); 630 #endif 631 632 /* 633 * Okay, the kernel starts 2MB in from the bottom of physical 634 * memory. We are going to allocate our bootstrap pages downwards 635 * from there. 636 * 637 * We need to allocate some fixed page tables to get the kernel 638 * going. We allocate one page directory and a number of page 639 * tables and store the physical addresses in the kernel_pt_table 640 * array. 641 * 642 * The kernel page directory must be on a 16K boundary. The page 643 * tables must be on 4K boundaries. What we do is allocate the 644 * page directory on the first 16K boundary that we encounter, and 645 * the page tables on 4K boundaries otherwise. Since we allocate 646 * at least 3 L2 page tables, we are guaranteed to encounter at 647 * least one 16K aligned region. 648 */ 649 650 #ifdef VERBOSE_INIT_ARM 651 printf("Allocating page tables\n"); 652 #endif 653 654 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 655 656 #ifdef VERBOSE_INIT_ARM 657 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 658 physical_freestart, free_pages, free_pages); 659 #endif 660 661 /* Define a macro to simplify memory allocation */ 662 #define valloc_pages(var, np) \ 663 alloc_pages((var).pv_pa, (np)); \ 664 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 665 666 #define alloc_pages(var, np) \ 667 physical_freeend -= ((np) * PAGE_SIZE); \ 668 if (physical_freeend < physical_freestart) \ 669 panic("initarm: out of memory"); \ 670 (var) = physical_freeend; \ 671 free_pages -= (np); \ 672 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 673 674 loop1 = 0; 675 kernel_l1pt.pv_pa = 0; 676 kernel_l1pt.pv_va = 0; 677 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 678 /* Are we 16KB aligned for an L1 ? */ 679 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 680 && kernel_l1pt.pv_pa == 0) { 681 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 682 } else { 683 valloc_pages(kernel_pt_table[loop1], 684 L2_TABLE_SIZE / PAGE_SIZE); 685 ++loop1; 686 } 687 } 688 689 /* This should never be able to happen but better confirm that. */ 690 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 691 panic("initarm: Failed to align the kernel page directory"); 692 693 LEDSTEP(); 694 695 /* 696 * Allocate a page for the system page mapped to V0x00000000 697 * This page will just contain the system vectors and can be 698 * shared by all processes. 699 */ 700 alloc_pages(systempage.pv_pa, 1); 701 702 /* Allocate stacks for all modes */ 703 valloc_pages(irqstack, IRQ_STACK_SIZE); 704 valloc_pages(abtstack, ABT_STACK_SIZE); 705 valloc_pages(undstack, UND_STACK_SIZE); 706 valloc_pages(kernelstack, UPAGES); 707 708 /* Allocate enough pages for cleaning the Mini-Data cache. */ 709 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 710 valloc_pages(minidataclean, 1); 711 712 #ifdef VERBOSE_INIT_ARM 713 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 714 irqstack.pv_va); 715 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 716 abtstack.pv_va); 717 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 718 undstack.pv_va); 719 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 720 kernelstack.pv_va); 721 #endif 722 723 /* 724 * XXX Defer this to later so that we can reclaim the memory 725 * XXX used by the RedBoot page tables. 726 */ 727 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 728 729 /* 730 * Ok we have allocated physical pages for the primary kernel 731 * page tables 732 */ 733 734 #ifdef VERBOSE_INIT_ARM 735 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 736 #endif 737 738 /* 739 * Now we start construction of the L1 page table 740 * We start by mapping the L2 page tables into the L1. 741 * This means that we can replace L1 mappings later on if necessary 742 */ 743 l1pagetable = kernel_l1pt.pv_pa; 744 745 /* Map the L2 pages tables in the L1 page table */ 746 pmap_link_l2pt(l1pagetable, 0x00000000, 747 &kernel_pt_table[KERNEL_PT_SYS]); 748 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 749 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 750 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 751 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 752 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 753 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 754 755 /* update the top of the kernel VM */ 756 pmap_curmaxkvaddr = 757 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 758 759 #ifdef VERBOSE_INIT_ARM 760 printf("Mapping kernel\n"); 761 #endif 762 763 /* Now we fill in the L2 pagetable for the kernel static code/data */ 764 { 765 extern char etext[], _end[]; 766 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 767 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 768 u_int logical; 769 770 textsize = (textsize + PGOFSET) & ~PGOFSET; 771 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 772 773 logical = 0x00200000; /* offset of kernel in RAM */ 774 775 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 776 physical_start + logical, textsize, 777 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 778 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 779 physical_start + logical, totalsize - textsize, 780 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 781 } 782 783 #ifdef VERBOSE_INIT_ARM 784 printf("Constructing L2 page tables\n"); 785 #endif 786 787 /* Map the stack pages */ 788 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 789 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 790 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 791 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 792 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 793 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 794 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 795 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 796 797 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 798 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 799 800 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 801 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 802 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 803 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 804 } 805 806 /* Map the Mini-Data cache clean area. */ 807 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 808 minidataclean.pv_pa); 809 810 /* Map the vector page. */ 811 #if 1 812 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 813 * cache-clean code there. */ 814 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 815 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 816 #else 817 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 818 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 819 #endif 820 821 /* 822 * map integrated peripherals at same address in l1pagetable 823 * so that we can continue to use console. 824 */ 825 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 826 827 /* 828 * Give the XScale global cache clean code an appropriately 829 * sized chunk of unmapped VA space starting at 0xff000000 830 * (our device mappings end before this address). 831 */ 832 xscale_cache_clean_addr = 0xff000000U; 833 834 /* 835 * Now we have the real page tables in place so we can switch to them. 836 * Once this is done we will be running with the REAL kernel page 837 * tables. 838 */ 839 840 /* 841 * Update the physical_freestart/physical_freeend/free_pages 842 * variables. 843 */ 844 { 845 extern char _end[]; 846 847 physical_freestart = physical_start + 848 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 849 KERNEL_BASE); 850 physical_freeend = physical_end; 851 free_pages = 852 (physical_freeend - physical_freestart) / PAGE_SIZE; 853 } 854 855 /* Switch tables */ 856 #ifdef VERBOSE_INIT_ARM 857 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 858 physical_freestart, free_pages, free_pages); 859 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 860 #endif 861 862 LEDSTEP(); 863 864 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 865 cpu_setttb(kernel_l1pt.pv_pa); 866 cpu_tlb_flushID(); 867 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 868 LEDSTEP(); 869 870 /* 871 * Moved from cpu_startup() as data_abort_handler() references 872 * this during uvm init 873 */ 874 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 875 876 #ifdef VERBOSE_INIT_ARM 877 printf("bootstrap done.\n"); 878 #endif 879 880 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 881 882 /* 883 * Pages were allocated during the secondary bootstrap for the 884 * stacks for different CPU modes. 885 * We must now set the r13 registers in the different CPU modes to 886 * point to these stacks. 887 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 888 * of the stack memory. 889 */ 890 printf("init subsystems: stacks "); 891 892 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 893 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 894 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 895 896 /* 897 * Well we should set a data abort handler. 898 * Once things get going this will change as we will need a proper 899 * handler. 900 * Until then we will use a handler that just panics but tells us 901 * why. 902 * Initialisation of the vectors will just panic on a data abort. 903 * This just fills in a slightly better one. 904 */ 905 printf("vectors "); 906 data_abort_handler_address = (u_int)data_abort_handler; 907 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 908 undefined_handler_address = (u_int)undefinedinstruction_bounce; 909 910 /* Initialise the undefined instruction handlers */ 911 printf("undefined "); 912 undefined_init(); 913 914 /* Load memory into UVM. */ 915 printf("page "); 916 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 917 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 918 atop(physical_freestart), atop(physical_freeend), 919 VM_FREELIST_DEFAULT); 920 921 /* Boot strap pmap telling it where the kernel page table is */ 922 printf("pmap "); 923 LEDSTEP(); 924 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 925 LEDSTEP(); 926 927 #ifdef __HAVE_MEMORY_DISK__ 928 md_root_setconf(memory_disk, sizeof memory_disk); 929 #endif 930 931 { 932 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 933 934 if (0 == (sw & (1<<13))) /* check S19 */ 935 boothowto |= RB_KDB; 936 if (0 == (sw & (1<<12))) /* S20 */ 937 boothowto |= RB_SINGLE; 938 } 939 940 LEDSTEP(); 941 942 #ifdef KGDB 943 if (boothowto & RB_KDB) { 944 kgdb_debug_init = 1; 945 kgdb_connect(1); 946 } 947 #endif 948 949 #ifdef DDB 950 db_machine_init(); 951 952 /* Firmware doesn't load symbols. */ 953 ddb_init(0, NULL, NULL); 954 955 if (boothowto & RB_KDB) 956 Debugger(); 957 #endif 958 959 /* We return the new stack pointer address */ 960 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 961 } 962 963 #if 0 964 void 965 process_kernel_args(char *args) 966 { 967 968 boothowto = 0; 969 970 /* Make a local copy of the bootargs */ 971 strncpy(bootargs, args, MAX_BOOT_STRING); 972 973 args = bootargs; 974 boot_file = bootargs; 975 976 /* Skip the kernel image filename */ 977 while (*args != ' ' && *args != 0) 978 ++args; 979 980 if (*args != 0) 981 *args++ = 0; 982 983 while (*args == ' ') 984 ++args; 985 986 boot_args = args; 987 988 printf("bootfile: %s\n", boot_file); 989 printf("bootargs: %s\n", boot_args); 990 991 parse_mi_bootargs(boot_args); 992 } 993 #endif 994 995 #ifdef KGDB 996 #ifndef KGDB_DEVNAME 997 #define KGDB_DEVNAME "ffuart" 998 #endif 999 const char kgdb_devname[] = KGDB_DEVNAME; 1000 1001 #if (NCOM > 0) 1002 #ifndef KGDB_DEVMODE 1003 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 1004 #endif 1005 int comkgdbmode = KGDB_DEVMODE; 1006 #endif /* NCOM */ 1007 1008 #endif /* KGDB */ 1009 1010 1011 void 1012 consinit(void) 1013 { 1014 static int consinit_called = 0; 1015 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1016 #if 0 1017 char *console = CONSDEVNAME; 1018 #endif 1019 1020 if (consinit_called != 0) 1021 return; 1022 1023 consinit_called = 1; 1024 1025 #if NCOM > 0 1026 1027 #ifdef FFUARTCONSOLE 1028 /* Check switch. */ 1029 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1030 /* We don't use FF serial when S17=no-dot position */ 1031 } 1032 #ifdef KGDB 1033 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1034 /* port is reserved for kgdb */ 1035 } 1036 #endif 1037 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1038 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1039 #if 0 1040 /* XXX: can't call pxa2x0_clkman_config yet */ 1041 pxa2x0_clkman_config(CKEN_FFUART, 1); 1042 #else 1043 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1044 ckenreg|CKEN_FFUART); 1045 #endif 1046 1047 return; 1048 } 1049 #endif /* FFUARTCONSOLE */ 1050 1051 #ifdef BTUARTCONSOLE 1052 #ifdef KGDB 1053 if (0 == strcmp(kgdb_devname, "btuart")) { 1054 /* port is reserved for kgdb */ 1055 } else 1056 #endif 1057 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1058 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1059 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1060 ckenreg|CKEN_BTUART); 1061 return; 1062 } 1063 #endif /* BTUARTCONSOLE */ 1064 1065 1066 #endif /* NCOM */ 1067 1068 } 1069 1070 #ifdef KGDB 1071 void 1072 kgdb_port_init(void) 1073 { 1074 #if (NCOM > 0) && defined(COM_PXA2X0) 1075 paddr_t paddr = 0; 1076 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1077 1078 if (0 == strcmp(kgdb_devname, "ffuart")) { 1079 paddr = PXA2X0_FFUART_BASE; 1080 ckenreg |= CKEN_FFUART; 1081 } 1082 else if (0 == strcmp(kgdb_devname, "btuart")) { 1083 paddr = PXA2X0_BTUART_BASE; 1084 ckenreg |= CKEN_BTUART; 1085 } 1086 1087 if (paddr && 1088 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1089 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1090 1091 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1092 } 1093 #endif 1094 } 1095 #endif 1096 1097 #if 0 1098 /* 1099 * display a number in hex LED. 1100 * a digit is blank when the corresponding bit in arg blank is 1 1101 */ 1102 unsigned short led_control_value = 0; 1103 1104 void 1105 hex_led_blank(uint32_t value, int blank) 1106 { 1107 int save = disable_interrupts(I32_bit); 1108 1109 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1110 led_control_value = (led_control_value & 0xff) 1111 | ((blank & 0xff)<<8); 1112 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1113 restore_interrupts(save); 1114 } 1115 #endif 1116
Indexes created Wed Oct 22 13:09:56 GMT 2025