lubbock_machdep.c revision 1.39
1 /* $NetBSD: lubbock_machdep.c,v 1.39 2019/07/16 14:41:47 skrll 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 1.39 2019/07/16 14:41:47 skrll Exp $"); 116 117 #include "opt_arm_debug.h" 118 #include "opt_console.h" 119 #include "opt_ddb.h" 120 #include "opt_kgdb.h" 121 #include "opt_pmap_debug.h" 122 #include "opt_md.h" 123 #include "opt_com.h" 124 #include "lcd.h" 125 126 #include <sys/param.h> 127 #include <sys/device.h> 128 #include <sys/systm.h> 129 #include <sys/kernel.h> 130 #include <sys/exec.h> 131 #include <sys/proc.h> 132 #include <sys/msgbuf.h> 133 #include <sys/reboot.h> 134 #include <sys/termios.h> 135 #include <sys/ksyms.h> 136 #include <sys/bus.h> 137 #include <sys/cpu.h> 138 #include <sys/conf.h> 139 140 #include <uvm/uvm_extern.h> 141 142 #include <dev/cons.h> 143 #include <dev/md.h> 144 #include <dev/ic/smc91cxxreg.h> 145 146 #include <machine/db_machdep.h> 147 #include <ddb/db_sym.h> 148 #include <ddb/db_extern.h> 149 #ifdef KGDB 150 #include <sys/kgdb.h> 151 #endif 152 153 #include <machine/bootconfig.h> 154 #include <arm/locore.h> 155 #include <arm/undefined.h> 156 157 #include <arm/arm32/machdep.h> 158 159 #include <arm/xscale/pxa2x0reg.h> 160 #include <arm/xscale/pxa2x0var.h> 161 #include <arm/xscale/pxa2x0_gpio.h> 162 #include <arm/sa11x0/sa1111_reg.h> 163 #include <evbarm/lubbock/lubbock_reg.h> 164 #include <evbarm/lubbock/lubbock_var.h> 165 166 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 167 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 168 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 169 170 /* 171 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 172 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 173 */ 174 #define KERNEL_VM_SIZE 0x0C000000 175 176 BootConfig bootconfig; /* Boot config storage */ 177 char *boot_args = NULL; 178 char *boot_file = NULL; 179 180 vaddr_t physical_start; 181 vaddr_t physical_freestart; 182 vaddr_t physical_freeend; 183 vaddr_t physical_end; 184 u_int free_pages; 185 186 /*int debug_flags;*/ 187 #ifndef PMAP_STATIC_L1S 188 int max_processes = 64; /* Default number */ 189 #endif /* !PMAP_STATIC_L1S */ 190 191 /* Physical and virtual addresses for some global pages */ 192 pv_addr_t minidataclean; 193 194 paddr_t msgbufphys; 195 196 #ifdef PMAP_DEBUG 197 extern int pmap_debug_level; 198 #endif 199 200 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 201 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 202 #define KERNEL_PT_KERNEL_NUM 4 203 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 204 /* Page tables for mapping kernel VM */ 205 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 206 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 207 208 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 209 210 /* Prototypes */ 211 212 #if 0 213 void process_kernel_args(char *); 214 #endif 215 216 void consinit(void); 217 void kgdb_port_init(void); 218 void change_clock(uint32_t v); 219 220 bs_protos(bs_notimpl); 221 222 #include "com.h" 223 #if NCOM > 0 224 #include <dev/ic/comreg.h> 225 #include <dev/ic/comvar.h> 226 #endif 227 228 #ifndef CONSPEED 229 #define CONSPEED B115200 /* What RedBoot uses */ 230 #endif 231 #ifndef CONMODE 232 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 233 #endif 234 235 int comcnspeed = CONSPEED; 236 int comcnmode = CONMODE; 237 238 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 239 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 240 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 241 242 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 243 244 { -1 } 245 }; 246 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 247 pxa25x_com_btuart_gpioconf, 248 pxa25x_com_ffuart_gpioconf, 249 #if 0 250 pxa25x_com_stuart_gpioconf, 251 #endif 252 pxa25x_pcic_gpioconf, 253 pxa25x_pxaacu_gpioconf, 254 boarddep_gpioconf, 255 NULL 256 }; 257 258 /* 259 * void cpu_reboot(int howto, char *bootstr) 260 * 261 * Reboots the system 262 * 263 * Deal with any syncing, unmounting, dumping and shutdown hooks, 264 * then reset the CPU. 265 */ 266 void 267 cpu_reboot(int howto, char *bootstr) 268 { 269 #ifdef DIAGNOSTIC 270 /* info */ 271 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 272 #endif 273 274 /* 275 * If we are still cold then hit the air brakes 276 * and crash to earth fast 277 */ 278 if (cold) { 279 doshutdownhooks(); 280 pmf_system_shutdown(boothowto); 281 printf("The operating system has halted.\n"); 282 printf("Please press any key to reboot.\n\n"); 283 cngetc(); 284 printf("rebooting...\n"); 285 cpu_reset(); 286 /*NOTREACHED*/ 287 } 288 289 /* Disable console buffering */ 290 /* cnpollc(1);*/ 291 292 /* 293 * If RB_NOSYNC was not specified sync the discs. 294 * Note: Unless cold is set to 1 here, syslogd will die during the 295 * unmount. It looks like syslogd is getting woken up only to find 296 * that it cannot page part of the binary in as the filesystem has 297 * been unmounted. 298 */ 299 if (!(howto & RB_NOSYNC)) 300 bootsync(); 301 302 /* Say NO to interrupts */ 303 splhigh(); 304 305 /* Do a dump if requested. */ 306 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 307 dumpsys(); 308 309 /* Run any shutdown hooks */ 310 doshutdownhooks(); 311 312 pmf_system_shutdown(boothowto); 313 314 /* Make sure IRQ's are disabled */ 315 IRQdisable; 316 317 if (howto & RB_HALT) { 318 printf("The operating system has halted.\n"); 319 printf("Please press any key to reboot.\n\n"); 320 cngetc(); 321 } 322 323 printf("rebooting...\n"); 324 cpu_reset(); 325 /*NOTREACHED*/ 326 } 327 328 static inline 329 pd_entry_t * 330 read_ttb(void) 331 { 332 long ttb; 333 334 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 335 336 337 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 338 } 339 340 /* 341 * Static device mappings. These peripheral registers are mapped at 342 * fixed virtual addresses very early in initarm() so that we can use 343 * them while booting the kernel, and stay at the same address 344 * throughout whole kernel's life time. 345 * 346 * We use this table twice; once with bootstrap page table, and once 347 * with kernel's page table which we build up in initarm(). 348 * 349 * Since we map these registers into the bootstrap page table using 350 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 351 * registers segment-aligned and segment-rounded in order to avoid 352 * using the 2nd page tables. 353 */ 354 355 #define _A(a) ((a) & ~L1_S_OFFSET) 356 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 357 358 static const struct pmap_devmap lubbock_devmap[] = { 359 { 360 LUBBOCK_OBIO_VBASE, 361 _A(LUBBOCK_OBIO_PBASE), 362 _S(LUBBOCK_OBIO_SIZE), 363 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 364 }, 365 { 366 LUBBOCK_GPIO_VBASE, 367 _A(PXA2X0_GPIO_BASE), 368 _S(PXA250_GPIO_SIZE), 369 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 370 }, 371 { 372 LUBBOCK_CLKMAN_VBASE, 373 _A(PXA2X0_CLKMAN_BASE), 374 _S(PXA2X0_CLKMAN_SIZE), 375 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 376 }, 377 { 378 LUBBOCK_INTCTL_VBASE, 379 _A(PXA2X0_INTCTL_BASE), 380 _S(PXA2X0_INTCTL_SIZE), 381 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 382 }, 383 { 384 LUBBOCK_FFUART_VBASE, 385 _A(PXA2X0_FFUART_BASE), 386 _S(4 * COM_NPORTS), 387 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 388 }, 389 { 390 LUBBOCK_BTUART_VBASE, 391 _A(PXA2X0_BTUART_BASE), 392 _S(4 * COM_NPORTS), 393 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 394 }, 395 396 {0, 0, 0, 0,} 397 }; 398 399 #undef _A 400 #undef _S 401 402 /* 403 * vaddr_t initarm(...) 404 * 405 * Initial entry point on startup. This gets called before main() is 406 * entered. 407 * It should be responsible for setting up everything that must be 408 * in place when main is called. 409 * This includes 410 * Taking a copy of the boot configuration structure. 411 * Initialising the physical console so characters can be printed. 412 * Setting up page tables for the kernel 413 * Relocating the kernel to the bottom of physical memory 414 */ 415 vaddr_t 416 initarm(void *arg) 417 { 418 extern vaddr_t xscale_cache_clean_addr; 419 int loop; 420 int loop1; 421 u_int l1pagetable; 422 paddr_t memstart; 423 psize_t memsize; 424 int led_data = 0; 425 #ifdef DIAGNOSTIC 426 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 427 #endif 428 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 429 #define LEDSTEP() hex_led(led_data++) 430 431 /* use physical address until pagetable is set */ 432 LEDSTEP_P(); 433 434 /* map some peripheral registers at static I/O area */ 435 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 436 437 LEDSTEP_P(); 438 439 /* start 32.768 kHz OSC */ 440 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 441 /* Get ready for splfoo() */ 442 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 443 444 LEDSTEP(); 445 446 /* 447 * Heads up ... Setup the CPU / MMU / TLB functions 448 */ 449 if (set_cpufuncs()) 450 panic("cpu not recognized!"); 451 452 LEDSTEP(); 453 454 455 #if 0 456 /* Calibrate the delay loop. */ 457 #endif 458 459 /* 460 * Okay, RedBoot has provided us with the following memory map: 461 * 462 * Physical Address Range Description 463 * ----------------------- ---------------------------------- 464 * 0x00000000 - 0x01ffffff flash Memory (32MB) 465 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 466 * 0x08000000 - 0x080000ff I/O baseboard registers 467 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 468 * 0x0c000000 - 0x0c0fffff Ethernet Controller 469 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 470 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 471 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 472 * 0x40000000 - 0x480fffff Processor Registers 473 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 474 * 475 * 476 * Virtual Address Range X C B Description 477 * ----------------------- - - - ---------------------------------- 478 * 0x00000000 - 0x00003fff N Y Y SDRAM 479 * 0x00004000 - 0x000fffff N Y N Boot ROM 480 * 0x00100000 - 0x01ffffff N N N Application Flash 481 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 482 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 483 * 0x0a000000 - 0x0a0fffff N N N SRAM 484 * 0x40000000 - 0x480fffff N N N Processor Registers 485 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 486 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 487 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 488 * (done by this routine) 489 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 490 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 491 * 0xfd400000 - 0xfd4fffff N N N FF-UART 492 * 0xfd500000 - 0xfd5fffff N N N BT-UART 493 * 494 * RedBoot's first level page table is at 0xa0004000. There 495 * are also 2 second-level tables at 0xa0008000 and 496 * 0xa0008400. We will continue to use them until we switch to 497 * our pagetable by cpu_setttb(). 498 * 499 */ 500 501 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 502 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 503 pxa2x0_gpio_config(lubbock_gpioconf); 504 505 /* turn on clock to UART block. 506 XXX: this should not be done here. */ 507 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 508 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 509 510 LEDSTEP(); 511 512 consinit(); 513 LEDSTEP(); 514 #ifdef KGDB 515 kgdb_port_init(); 516 LEDSTEP(); 517 #endif 518 519 520 /* Talk to the user */ 521 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 522 523 /* Tweak memory controller */ 524 { 525 /* Modify access timing for CS3 (91c96) */ 526 527 uint32_t tmp = 528 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 529 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 530 (tmp & 0xffff) | (0x3881<<16)); 531 /* RRR=3, RDN=8, RDF=8 532 * XXX: can be faster? 533 */ 534 } 535 536 537 /* Initialize for PCMCIA/CF sockets */ 538 { 539 uint32_t tmp; 540 541 /* Activate two sockets. 542 XXX: This code segment should be moved to 543 pcmcia MD attach routine. 544 XXX: These bits should be toggled based on 545 existene of PCMCIA/CF cards 546 */ 547 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 548 MECR_NOS|MECR_CIT); 549 550 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 551 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 552 (tmp & ~(1<<4)) | (1<<0)); 553 } 554 555 #if 0 556 /* 557 * Examine the boot args string for options we need to know about 558 * now. 559 */ 560 process_kernel_args((char *)nwbootinfo.bt_args); 561 #endif 562 563 { 564 int processor_card_id; 565 566 processor_card_id = 0x000f & 567 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 568 switch(processor_card_id){ 569 case 0: 570 /* Cotulla */ 571 memstart = 0xa0000000; 572 memsize = 0x04000000; /* 64MB */ 573 break; 574 case 1: 575 /* XXX: Sabiani */ 576 memstart = 0xa0000000; 577 memsize = 0x04000000; /* 64MB */ 578 break; 579 default: 580 /* XXX: Unknown */ 581 memstart = 0xa0000000; 582 memsize = 0x04000000; /* 64MB */ 583 } 584 } 585 586 printf("initarm: Configuring system ...\n"); 587 588 /* Fake bootconfig structure for the benefit of pmap.c */ 589 /* XXX must make the memory description h/w independent */ 590 bootconfig.dramblocks = 1; 591 bootconfig.dram[0].address = memstart; 592 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 593 594 /* 595 * Set up the variables that define the availablilty of 596 * physical memory. For now, we're going to set 597 * physical_freestart to 0xa0200000 (where the kernel 598 * was loaded), and allocate the memory we need downwards. 599 * If we get too close to the page tables that RedBoot 600 * set up, we will panic. We will update physical_freestart 601 * and physical_freeend later to reflect what pmap_bootstrap() 602 * wants to see. 603 * 604 * XXX pmap_bootstrap() needs an enema. 605 */ 606 physical_start = bootconfig.dram[0].address; 607 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 608 609 physical_freestart = 0xa0009000UL; 610 physical_freeend = 0xa0200000UL; 611 612 physmem = (physical_end - physical_start) / PAGE_SIZE; 613 614 #ifdef VERBOSE_INIT_ARM 615 /* Tell the user about the memory */ 616 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 617 physical_start, physical_end - 1); 618 #endif 619 620 /* 621 * Okay, the kernel starts 2MB in from the bottom of physical 622 * memory. We are going to allocate our bootstrap pages downwards 623 * from there. 624 * 625 * We need to allocate some fixed page tables to get the kernel 626 * going. We allocate one page directory and a number of page 627 * tables and store the physical addresses in the kernel_pt_table 628 * array. 629 * 630 * The kernel page directory must be on a 16K boundary. The page 631 * tables must be on 4K boundaries. What we do is allocate the 632 * page directory on the first 16K boundary that we encounter, and 633 * the page tables on 4K boundaries otherwise. Since we allocate 634 * at least 3 L2 page tables, we are guaranteed to encounter at 635 * least one 16K aligned region. 636 */ 637 638 #ifdef VERBOSE_INIT_ARM 639 printf("Allocating page tables\n"); 640 #endif 641 642 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 643 644 #ifdef VERBOSE_INIT_ARM 645 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 646 physical_freestart, free_pages, free_pages); 647 #endif 648 649 /* Define a macro to simplify memory allocation */ 650 #define valloc_pages(var, np) \ 651 alloc_pages((var).pv_pa, (np)); \ 652 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 653 654 #define alloc_pages(var, np) \ 655 physical_freeend -= ((np) * PAGE_SIZE); \ 656 if (physical_freeend < physical_freestart) \ 657 panic("initarm: out of memory"); \ 658 (var) = physical_freeend; \ 659 free_pages -= (np); \ 660 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 661 662 loop1 = 0; 663 kernel_l1pt.pv_pa = 0; 664 kernel_l1pt.pv_va = 0; 665 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 666 /* Are we 16KB aligned for an L1 ? */ 667 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 668 && kernel_l1pt.pv_pa == 0) { 669 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 670 } else { 671 valloc_pages(kernel_pt_table[loop1], 672 L2_TABLE_SIZE / PAGE_SIZE); 673 ++loop1; 674 } 675 } 676 677 /* This should never be able to happen but better confirm that. */ 678 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 679 panic("initarm: Failed to align the kernel page directory"); 680 681 LEDSTEP(); 682 683 /* 684 * Allocate a page for the system page mapped to V0x00000000 685 * This page will just contain the system vectors and can be 686 * shared by all processes. 687 */ 688 alloc_pages(systempage.pv_pa, 1); 689 690 /* Allocate stacks for all modes */ 691 valloc_pages(irqstack, IRQ_STACK_SIZE); 692 valloc_pages(abtstack, ABT_STACK_SIZE); 693 valloc_pages(undstack, UND_STACK_SIZE); 694 valloc_pages(kernelstack, UPAGES); 695 696 /* Allocate enough pages for cleaning the Mini-Data cache. */ 697 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 698 valloc_pages(minidataclean, 1); 699 700 #ifdef VERBOSE_INIT_ARM 701 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 702 irqstack.pv_va); 703 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 704 abtstack.pv_va); 705 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 706 undstack.pv_va); 707 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 708 kernelstack.pv_va); 709 #endif 710 711 /* 712 * XXX Defer this to later so that we can reclaim the memory 713 * XXX used by the RedBoot page tables. 714 */ 715 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 716 717 /* 718 * Ok we have allocated physical pages for the primary kernel 719 * page tables 720 */ 721 722 #ifdef VERBOSE_INIT_ARM 723 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 724 #endif 725 726 /* 727 * Now we start construction of the L1 page table 728 * We start by mapping the L2 page tables into the L1. 729 * This means that we can replace L1 mappings later on if necessary 730 */ 731 l1pagetable = kernel_l1pt.pv_pa; 732 733 /* Map the L2 pages tables in the L1 page table */ 734 pmap_link_l2pt(l1pagetable, 0x00000000, 735 &kernel_pt_table[KERNEL_PT_SYS]); 736 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 737 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 738 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 739 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 740 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 741 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 742 743 /* update the top of the kernel VM */ 744 pmap_curmaxkvaddr = 745 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 746 747 #ifdef VERBOSE_INIT_ARM 748 printf("Mapping kernel\n"); 749 #endif 750 751 /* Now we fill in the L2 pagetable for the kernel static code/data */ 752 { 753 extern char etext[], _end[]; 754 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 755 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 756 u_int logical; 757 758 textsize = (textsize + PGOFSET) & ~PGOFSET; 759 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 760 761 logical = 0x00200000; /* offset of kernel in RAM */ 762 763 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 764 physical_start + logical, textsize, 765 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 766 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 767 physical_start + logical, totalsize - textsize, 768 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 769 } 770 771 #ifdef VERBOSE_INIT_ARM 772 printf("Constructing L2 page tables\n"); 773 #endif 774 775 /* Map the stack pages */ 776 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 777 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 778 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 779 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 780 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 781 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 782 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 783 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 784 785 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 786 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 787 788 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 789 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 790 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 791 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 792 } 793 794 /* Map the Mini-Data cache clean area. */ 795 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 796 minidataclean.pv_pa); 797 798 /* Map the vector page. */ 799 #if 1 800 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 801 * cache-clean code there. */ 802 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 803 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 804 #else 805 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 806 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 807 #endif 808 809 /* 810 * map integrated peripherals at same address in l1pagetable 811 * so that we can continue to use console. 812 */ 813 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 814 815 /* 816 * Give the XScale global cache clean code an appropriately 817 * sized chunk of unmapped VA space starting at 0xff000000 818 * (our device mappings end before this address). 819 */ 820 xscale_cache_clean_addr = 0xff000000U; 821 822 /* 823 * Now we have the real page tables in place so we can switch to them. 824 * Once this is done we will be running with the REAL kernel page 825 * tables. 826 */ 827 828 /* 829 * Update the physical_freestart/physical_freeend/free_pages 830 * variables. 831 */ 832 { 833 extern char _end[]; 834 835 physical_freestart = physical_start + 836 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 837 KERNEL_BASE); 838 physical_freeend = physical_end; 839 free_pages = 840 (physical_freeend - physical_freestart) / PAGE_SIZE; 841 } 842 843 /* Switch tables */ 844 #ifdef VERBOSE_INIT_ARM 845 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 846 physical_freestart, free_pages, free_pages); 847 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 848 #endif 849 850 LEDSTEP(); 851 852 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 853 cpu_setttb(kernel_l1pt.pv_pa, true); 854 cpu_tlb_flushID(); 855 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 856 LEDSTEP(); 857 858 /* 859 * Moved from cpu_startup() as data_abort_handler() references 860 * this during uvm init 861 */ 862 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 863 864 #ifdef VERBOSE_INIT_ARM 865 printf("bootstrap done.\n"); 866 #endif 867 868 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 869 870 /* 871 * Pages were allocated during the secondary bootstrap for the 872 * stacks for different CPU modes. 873 * We must now set the r13 registers in the different CPU modes to 874 * point to these stacks. 875 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 876 * of the stack memory. 877 */ 878 printf("init subsystems: stacks "); 879 880 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 881 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 882 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 883 884 /* 885 * Well we should set a data abort handler. 886 * Once things get going this will change as we will need a proper 887 * handler. 888 * Until then we will use a handler that just panics but tells us 889 * why. 890 * Initialisation of the vectors will just panic on a data abort. 891 * This just fills in a slightly better one. 892 */ 893 printf("vectors "); 894 data_abort_handler_address = (u_int)data_abort_handler; 895 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 896 undefined_handler_address = (u_int)undefinedinstruction_bounce; 897 898 /* Initialise the undefined instruction handlers */ 899 printf("undefined "); 900 undefined_init(); 901 902 /* Load memory into UVM. */ 903 printf("page "); 904 uvm_md_init(); 905 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 906 atop(physical_freestart), atop(physical_freeend), 907 VM_FREELIST_DEFAULT); 908 909 /* Boot strap pmap telling it where managed kernel virtual memory is */ 910 printf("pmap "); 911 LEDSTEP(); 912 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 913 LEDSTEP(); 914 915 #ifdef __HAVE_MEMORY_DISK__ 916 md_root_setconf(memory_disk, sizeof memory_disk); 917 #endif 918 919 { 920 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 921 922 if (0 == (sw & (1<<13))) /* check S19 */ 923 boothowto |= RB_KDB; 924 if (0 == (sw & (1<<12))) /* S20 */ 925 boothowto |= RB_SINGLE; 926 } 927 928 LEDSTEP(); 929 930 #ifdef KGDB 931 if (boothowto & RB_KDB) { 932 kgdb_debug_init = 1; 933 kgdb_connect(1); 934 } 935 #endif 936 937 #ifdef DDB 938 db_machine_init(); 939 940 /* Firmware doesn't load symbols. */ 941 ddb_init(0, NULL, NULL); 942 943 if (boothowto & RB_KDB) 944 Debugger(); 945 #endif 946 947 /* We return the new stack pointer address */ 948 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 949 } 950 951 #if 0 952 void 953 process_kernel_args(char *args) 954 { 955 956 boothowto = 0; 957 958 /* Make a local copy of the bootargs */ 959 strncpy(bootargs, args, MAX_BOOT_STRING); 960 961 args = bootargs; 962 boot_file = bootargs; 963 964 /* Skip the kernel image filename */ 965 while (*args != ' ' && *args != 0) 966 ++args; 967 968 if (*args != 0) 969 *args++ = 0; 970 971 while (*args == ' ') 972 ++args; 973 974 boot_args = args; 975 976 printf("bootfile: %s\n", boot_file); 977 printf("bootargs: %s\n", boot_args); 978 979 parse_mi_bootargs(boot_args); 980 } 981 #endif 982 983 #ifdef KGDB 984 #ifndef KGDB_DEVNAME 985 #define KGDB_DEVNAME "ffuart" 986 #endif 987 const char kgdb_devname[] = KGDB_DEVNAME; 988 989 #if (NCOM > 0) 990 #ifndef KGDB_DEVMODE 991 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 992 #endif 993 int comkgdbmode = KGDB_DEVMODE; 994 #endif /* NCOM */ 995 996 #endif /* KGDB */ 997 998 999 void 1000 consinit(void) 1001 { 1002 static int consinit_called = 0; 1003 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1004 #if 0 1005 char *console = CONSDEVNAME; 1006 #endif 1007 1008 if (consinit_called != 0) 1009 return; 1010 1011 consinit_called = 1; 1012 1013 #if NCOM > 0 1014 1015 #ifdef FFUARTCONSOLE 1016 /* Check switch. */ 1017 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1018 /* We don't use FF serial when S17=no-dot position */ 1019 } 1020 #ifdef KGDB 1021 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1022 /* port is reserved for kgdb */ 1023 } 1024 #endif 1025 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1026 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1027 #if 0 1028 /* XXX: can't call pxa2x0_clkman_config yet */ 1029 pxa2x0_clkman_config(CKEN_FFUART, 1); 1030 #else 1031 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1032 ckenreg|CKEN_FFUART); 1033 #endif 1034 1035 return; 1036 } 1037 #endif /* FFUARTCONSOLE */ 1038 1039 #ifdef BTUARTCONSOLE 1040 #ifdef KGDB 1041 if (0 == strcmp(kgdb_devname, "btuart")) { 1042 /* port is reserved for kgdb */ 1043 } else 1044 #endif 1045 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1046 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1047 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1048 ckenreg|CKEN_BTUART); 1049 return; 1050 } 1051 #endif /* BTUARTCONSOLE */ 1052 1053 1054 #endif /* NCOM */ 1055 1056 } 1057 1058 #ifdef KGDB 1059 void 1060 kgdb_port_init(void) 1061 { 1062 #if (NCOM > 0) && defined(COM_PXA2X0) 1063 paddr_t paddr = 0; 1064 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1065 1066 if (0 == strcmp(kgdb_devname, "ffuart")) { 1067 paddr = PXA2X0_FFUART_BASE; 1068 ckenreg |= CKEN_FFUART; 1069 } 1070 else if (0 == strcmp(kgdb_devname, "btuart")) { 1071 paddr = PXA2X0_BTUART_BASE; 1072 ckenreg |= CKEN_BTUART; 1073 } 1074 1075 if (paddr && 1076 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1077 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1078 1079 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1080 } 1081 #endif 1082 } 1083 #endif 1084 1085 #if 0 1086 /* 1087 * display a number in hex LED. 1088 * a digit is blank when the corresponding bit in arg blank is 1 1089 */ 1090 unsigned short led_control_value = 0; 1091 1092 void 1093 hex_led_blank(uint32_t value, int blank) 1094 { 1095 int save = disable_interrupts(I32_bit); 1096 1097 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1098 led_control_value = (led_control_value & 0xff) 1099 | ((blank & 0xff)<<8); 1100 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1101 restore_interrupts(save); 1102 } 1103 #endif 1104
Indexes created Thu Oct 23 22:10:10 GMT 2025