lubbock_machdep.c revision 1.34.16.3
1 /* $NetBSD: lubbock_machdep.c,v 1.34.16.3 2020/04/21 18:42:06 martin Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved. 5 * Written by Hiroyuki Bessho for Genetec Corporation. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. The name of Genetec Corporation may not be used to endorse or 16 * promote products derived from this software without specific prior 17 * written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 * 31 * Machine dependent functions for kernel setup for 32 * Intel DBPXA250 evaluation board (a.k.a. Lubbock). 33 * Based on iq80310_machhdep.c 34 */ 35 /* 36 * Copyright (c) 2001 Wasabi Systems, Inc. 37 * All rights reserved. 38 * 39 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed for the NetBSD Project by 52 * Wasabi Systems, Inc. 53 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 54 * or promote products derived from this software without specific prior 55 * written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 59 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 60 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 61 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 62 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 63 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 64 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 65 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 66 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 67 * POSSIBILITY OF SUCH DAMAGE. 68 */ 69 70 /* 71 * Copyright (c) 1997,1998 Mark Brinicombe. 72 * Copyright (c) 1997,1998 Causality Limited. 73 * All rights reserved. 74 * 75 * Redistribution and use in source and binary forms, with or without 76 * modification, are permitted provided that the following conditions 77 * are met: 78 * 1. Redistributions of source code must retain the above copyright 79 * notice, this list of conditions and the following disclaimer. 80 * 2. Redistributions in binary form must reproduce the above copyright 81 * notice, this list of conditions and the following disclaimer in the 82 * documentation and/or other materials provided with the distribution. 83 * 3. All advertising materials mentioning features or use of this software 84 * must display the following acknowledgement: 85 * This product includes software developed by Mark Brinicombe 86 * for the NetBSD Project. 87 * 4. The name of the company nor the name of the author may be used to 88 * endorse or promote products derived from this software without specific 89 * prior written permission. 90 * 91 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 92 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 93 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 94 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 95 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 96 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 97 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 98 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 99 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 100 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 101 * SUCH DAMAGE. 102 * 103 * Machine dependent functions for kernel setup for Intel IQ80310 evaluation 104 * boards using RedBoot firmware. 105 */ 106 107 /* 108 * DIP switches: 109 * 110 * S19: no-dot: set RB_KDB. enter kgdb session. 111 * S20: no-dot: set RB_SINGLE. don't go multi user mode. 112 */ 113 114 #include <sys/cdefs.h> 115 __KERNEL_RCSID(0, "$NetBSD: lubbock_machdep.c,v 1.34.16.3 2020/04/21 18:42:06 martin 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_md.h" 122 #include "opt_com.h" 123 #include "lcd.h" 124 125 #include <sys/param.h> 126 #include <sys/device.h> 127 #include <sys/systm.h> 128 #include <sys/kernel.h> 129 #include <sys/exec.h> 130 #include <sys/proc.h> 131 #include <sys/msgbuf.h> 132 #include <sys/reboot.h> 133 #include <sys/termios.h> 134 #include <sys/ksyms.h> 135 #include <sys/bus.h> 136 #include <sys/cpu.h> 137 #include <sys/conf.h> 138 139 #include <uvm/uvm_extern.h> 140 141 #include <dev/cons.h> 142 #include <dev/md.h> 143 #include <dev/ic/smc91cxxreg.h> 144 145 #include <machine/db_machdep.h> 146 #include <ddb/db_sym.h> 147 #include <ddb/db_extern.h> 148 #ifdef KGDB 149 #include <sys/kgdb.h> 150 #endif 151 152 #include <machine/bootconfig.h> 153 #include <arm/locore.h> 154 #include <arm/undefined.h> 155 156 #include <arm/arm32/machdep.h> 157 158 #include <arm/xscale/pxa2x0reg.h> 159 #include <arm/xscale/pxa2x0var.h> 160 #include <arm/xscale/pxa2x0_gpio.h> 161 #include <arm/sa11x0/sa1111_reg.h> 162 #include <evbarm/lubbock/lubbock_reg.h> 163 #include <evbarm/lubbock/lubbock_var.h> 164 165 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 166 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 167 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 168 169 /* 170 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 171 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 172 */ 173 #define KERNEL_VM_SIZE 0x0C000000 174 175 BootConfig bootconfig; /* Boot config storage */ 176 char *boot_args = NULL; 177 char *boot_file = NULL; 178 179 vaddr_t physical_start; 180 vaddr_t physical_freestart; 181 vaddr_t physical_freeend; 182 vaddr_t physical_end; 183 u_int free_pages; 184 185 /*int debug_flags;*/ 186 #ifndef PMAP_STATIC_L1S 187 int max_processes = 64; /* Default number */ 188 #endif /* !PMAP_STATIC_L1S */ 189 190 /* Physical and virtual addresses for some global pages */ 191 pv_addr_t minidataclean; 192 193 paddr_t msgbufphys; 194 195 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 196 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 197 #define KERNEL_PT_KERNEL_NUM 4 198 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) 199 /* Page tables for mapping kernel VM */ 200 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 201 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 202 203 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 204 205 /* Prototypes */ 206 207 #if 0 208 void process_kernel_args(char *); 209 #endif 210 211 void consinit(void); 212 void kgdb_port_init(void); 213 void change_clock(uint32_t v); 214 215 bs_protos(bs_notimpl); 216 217 #include "com.h" 218 #if NCOM > 0 219 #include <dev/ic/comreg.h> 220 #include <dev/ic/comvar.h> 221 #endif 222 223 #ifndef CONSPEED 224 #define CONSPEED B115200 /* What RedBoot uses */ 225 #endif 226 #ifndef CONMODE 227 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 228 #endif 229 230 int comcnspeed = CONSPEED; 231 int comcnmode = CONMODE; 232 233 static struct pxa2x0_gpioconf boarddep_gpioconf[] = { 234 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */ 235 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */ 236 237 { 29, GPIO_ALT_FN_1_IN }, /* SDATA_IN0 */ 238 239 { -1 } 240 }; 241 static struct pxa2x0_gpioconf *lubbock_gpioconf[] = { 242 pxa25x_com_btuart_gpioconf, 243 pxa25x_com_ffuart_gpioconf, 244 #if 0 245 pxa25x_com_stuart_gpioconf, 246 #endif 247 pxa25x_pcic_gpioconf, 248 pxa25x_pxaacu_gpioconf, 249 boarddep_gpioconf, 250 NULL 251 }; 252 253 /* 254 * void cpu_reboot(int howto, char *bootstr) 255 * 256 * Reboots the system 257 * 258 * Deal with any syncing, unmounting, dumping and shutdown hooks, 259 * then reset the CPU. 260 */ 261 void 262 cpu_reboot(int howto, char *bootstr) 263 { 264 #ifdef DIAGNOSTIC 265 /* info */ 266 printf("boot: howto=%08x curproc=%p\n", howto, curproc); 267 #endif 268 269 /* 270 * If we are still cold then hit the air brakes 271 * and crash to earth fast 272 */ 273 if (cold) { 274 doshutdownhooks(); 275 pmf_system_shutdown(boothowto); 276 printf("The operating system has halted.\n"); 277 printf("Please press any key to reboot.\n\n"); 278 cngetc(); 279 printf("rebooting...\n"); 280 cpu_reset(); 281 /*NOTREACHED*/ 282 } 283 284 /* Disable console buffering */ 285 /* cnpollc(1);*/ 286 287 /* 288 * If RB_NOSYNC was not specified sync the discs. 289 * Note: Unless cold is set to 1 here, syslogd will die during the 290 * unmount. It looks like syslogd is getting woken up only to find 291 * that it cannot page part of the binary in as the filesystem has 292 * been unmounted. 293 */ 294 if (!(howto & RB_NOSYNC)) 295 bootsync(); 296 297 /* Say NO to interrupts */ 298 splhigh(); 299 300 /* Do a dump if requested. */ 301 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 302 dumpsys(); 303 304 /* Run any shutdown hooks */ 305 doshutdownhooks(); 306 307 pmf_system_shutdown(boothowto); 308 309 /* Make sure IRQ's are disabled */ 310 IRQdisable; 311 312 if (howto & RB_HALT) { 313 printf("The operating system has halted.\n"); 314 printf("Please press any key to reboot.\n\n"); 315 cngetc(); 316 } 317 318 printf("rebooting...\n"); 319 cpu_reset(); 320 /*NOTREACHED*/ 321 } 322 323 static inline 324 pd_entry_t * 325 read_ttb(void) 326 { 327 long ttb; 328 329 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r" (ttb)); 330 331 332 return (pd_entry_t *)(ttb & ~((1<<14)-1)); 333 } 334 335 /* 336 * Static device mappings. These peripheral registers are mapped at 337 * fixed virtual addresses very early in initarm() so that we can use 338 * them while booting the kernel, and stay at the same address 339 * throughout whole kernel's life time. 340 * 341 * We use this table twice; once with bootstrap page table, and once 342 * with kernel's page table which we build up in initarm(). 343 * 344 * Since we map these registers into the bootstrap page table using 345 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map 346 * registers segment-aligned and segment-rounded in order to avoid 347 * using the 2nd page tables. 348 */ 349 350 #define _A(a) ((a) & ~L1_S_OFFSET) 351 #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) 352 353 static const struct pmap_devmap lubbock_devmap[] = { 354 { 355 LUBBOCK_OBIO_VBASE, 356 _A(LUBBOCK_OBIO_PBASE), 357 _S(LUBBOCK_OBIO_SIZE), 358 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 359 }, 360 { 361 LUBBOCK_GPIO_VBASE, 362 _A(PXA2X0_GPIO_BASE), 363 _S(PXA250_GPIO_SIZE), 364 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 365 }, 366 { 367 LUBBOCK_CLKMAN_VBASE, 368 _A(PXA2X0_CLKMAN_BASE), 369 _S(PXA2X0_CLKMAN_SIZE), 370 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 371 }, 372 { 373 LUBBOCK_INTCTL_VBASE, 374 _A(PXA2X0_INTCTL_BASE), 375 _S(PXA2X0_INTCTL_SIZE), 376 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 377 }, 378 { 379 LUBBOCK_FFUART_VBASE, 380 _A(PXA2X0_FFUART_BASE), 381 _S(4 * COM_NPORTS), 382 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 383 }, 384 { 385 LUBBOCK_BTUART_VBASE, 386 _A(PXA2X0_BTUART_BASE), 387 _S(4 * COM_NPORTS), 388 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE, 389 }, 390 391 {0, 0, 0, 0,} 392 }; 393 394 #undef _A 395 #undef _S 396 397 /* 398 * vaddr_t initarm(...) 399 * 400 * Initial entry point on startup. This gets called before main() is 401 * entered. 402 * It should be responsible for setting up everything that must be 403 * in place when main is called. 404 * This includes 405 * Taking a copy of the boot configuration structure. 406 * Initialising the physical console so characters can be printed. 407 * Setting up page tables for the kernel 408 * Relocating the kernel to the bottom of physical memory 409 */ 410 vaddr_t 411 initarm(void *arg) 412 { 413 extern vaddr_t xscale_cache_clean_addr; 414 int loop; 415 int loop1; 416 u_int l1pagetable; 417 paddr_t memstart; 418 psize_t memsize; 419 int led_data = 0; 420 #ifdef DIAGNOSTIC 421 extern vsize_t xscale_minidata_clean_size; /* used in KASSERT */ 422 #endif 423 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 424 #define LEDSTEP() hex_led(led_data++) 425 426 /* use physical address until pagetable is set */ 427 LEDSTEP_P(); 428 429 /* map some peripheral registers at static I/O area */ 430 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 431 432 LEDSTEP_P(); 433 434 /* start 32.768 kHz OSC */ 435 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 436 /* Get ready for splfoo() */ 437 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 438 439 LEDSTEP(); 440 441 /* 442 * Heads up ... Setup the CPU / MMU / TLB functions 443 */ 444 if (set_cpufuncs()) 445 panic("cpu not recognized!"); 446 447 LEDSTEP(); 448 449 450 #if 0 451 /* Calibrate the delay loop. */ 452 #endif 453 454 /* 455 * Okay, RedBoot has provided us with the following memory map: 456 * 457 * Physical Address Range Description 458 * ----------------------- ---------------------------------- 459 * 0x00000000 - 0x01ffffff flash Memory (32MB) 460 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 461 * 0x08000000 - 0x080000ff I/O baseboard registers 462 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 463 * 0x0c000000 - 0x0c0fffff Ethernet Controller 464 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 465 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 466 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 467 * 0x40000000 - 0x480fffff Processor Registers 468 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 469 * 470 * 471 * Virtual Address Range X C B Description 472 * ----------------------- - - - ---------------------------------- 473 * 0x00000000 - 0x00003fff N Y Y SDRAM 474 * 0x00004000 - 0x000fffff N Y N Boot ROM 475 * 0x00100000 - 0x01ffffff N N N Application Flash 476 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 477 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 478 * 0x0a000000 - 0x0a0fffff N N N SRAM 479 * 0x40000000 - 0x480fffff N N N Processor Registers 480 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 481 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 482 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 483 * (done by this routine) 484 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 485 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 486 * 0xfd400000 - 0xfd4fffff N N N FF-UART 487 * 0xfd500000 - 0xfd5fffff N N N BT-UART 488 * 489 * RedBoot's first level page table is at 0xa0004000. There 490 * are also 2 second-level tables at 0xa0008000 and 491 * 0xa0008400. We will continue to use them until we switch to 492 * our pagetable by cpu_setttb(). 493 * 494 */ 495 496 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 497 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 498 pxa2x0_gpio_config(lubbock_gpioconf); 499 500 /* turn on clock to UART block. 501 XXX: this should not be done here. */ 502 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 503 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 504 505 LEDSTEP(); 506 507 consinit(); 508 LEDSTEP(); 509 #ifdef KGDB 510 kgdb_port_init(); 511 LEDSTEP(); 512 #endif 513 514 515 /* Talk to the user */ 516 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 517 518 /* Tweak memory controller */ 519 { 520 /* Modify access timing for CS3 (91c96) */ 521 522 uint32_t tmp = 523 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 524 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 525 (tmp & 0xffff) | (0x3881<<16)); 526 /* RRR=3, RDN=8, RDF=8 527 * XXX: can be faster? 528 */ 529 } 530 531 532 /* Initialize for PCMCIA/CF sockets */ 533 { 534 uint32_t tmp; 535 536 /* Activate two sockets. 537 XXX: This code segment should be moved to 538 pcmcia MD attach routine. 539 XXX: These bits should be toggled based on 540 existene of PCMCIA/CF cards 541 */ 542 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 543 MECR_NOS|MECR_CIT); 544 545 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 546 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 547 (tmp & ~(1<<4)) | (1<<0)); 548 } 549 550 #if 0 551 /* 552 * Examine the boot args string for options we need to know about 553 * now. 554 */ 555 process_kernel_args((char *)nwbootinfo.bt_args); 556 #endif 557 558 { 559 int processor_card_id; 560 561 processor_card_id = 0x000f & 562 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 563 switch(processor_card_id){ 564 case 0: 565 /* Cotulla */ 566 memstart = 0xa0000000; 567 memsize = 0x04000000; /* 64MB */ 568 break; 569 case 1: 570 /* XXX: Sabiani */ 571 memstart = 0xa0000000; 572 memsize = 0x04000000; /* 64MB */ 573 break; 574 default: 575 /* XXX: Unknown */ 576 memstart = 0xa0000000; 577 memsize = 0x04000000; /* 64MB */ 578 } 579 } 580 581 printf("initarm: Configuring system ...\n"); 582 583 /* Fake bootconfig structure for the benefit of pmap.c */ 584 /* XXX must make the memory description h/w independent */ 585 bootconfig.dramblocks = 1; 586 bootconfig.dram[0].address = memstart; 587 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 588 589 /* 590 * Set up the variables that define the availablilty of 591 * physical memory. For now, we're going to set 592 * physical_freestart to 0xa0200000 (where the kernel 593 * was loaded), and allocate the memory we need downwards. 594 * If we get too close to the page tables that RedBoot 595 * set up, we will panic. We will update physical_freestart 596 * and physical_freeend later to reflect what pmap_bootstrap() 597 * wants to see. 598 * 599 * XXX pmap_bootstrap() needs an enema. 600 */ 601 physical_start = bootconfig.dram[0].address; 602 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 603 604 physical_freestart = 0xa0009000UL; 605 physical_freeend = 0xa0200000UL; 606 607 physmem = (physical_end - physical_start) / PAGE_SIZE; 608 609 #ifdef VERBOSE_INIT_ARM 610 /* Tell the user about the memory */ 611 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 612 physical_start, physical_end - 1); 613 #endif 614 615 /* 616 * Okay, the kernel starts 2MB in from the bottom of physical 617 * memory. We are going to allocate our bootstrap pages downwards 618 * from there. 619 * 620 * We need to allocate some fixed page tables to get the kernel 621 * going. We allocate one page directory and a number of page 622 * tables and store the physical addresses in the kernel_pt_table 623 * array. 624 * 625 * The kernel page directory must be on a 16K boundary. The page 626 * tables must be on 4K boundaries. What we do is allocate the 627 * page directory on the first 16K boundary that we encounter, and 628 * the page tables on 4K boundaries otherwise. Since we allocate 629 * at least 3 L2 page tables, we are guaranteed to encounter at 630 * least one 16K aligned region. 631 */ 632 633 #ifdef VERBOSE_INIT_ARM 634 printf("Allocating page tables\n"); 635 #endif 636 637 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 638 639 #ifdef VERBOSE_INIT_ARM 640 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 641 physical_freestart, free_pages, free_pages); 642 #endif 643 644 /* Define a macro to simplify memory allocation */ 645 #define valloc_pages(var, np) \ 646 alloc_pages((var).pv_pa, (np)); \ 647 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 648 649 #define alloc_pages(var, np) \ 650 physical_freeend -= ((np) * PAGE_SIZE); \ 651 if (physical_freeend < physical_freestart) \ 652 panic("initarm: out of memory"); \ 653 (var) = physical_freeend; \ 654 free_pages -= (np); \ 655 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 656 657 loop1 = 0; 658 kernel_l1pt.pv_pa = 0; 659 kernel_l1pt.pv_va = 0; 660 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 661 /* Are we 16KB aligned for an L1 ? */ 662 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 663 && kernel_l1pt.pv_pa == 0) { 664 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 665 } else { 666 valloc_pages(kernel_pt_table[loop1], 667 L2_TABLE_SIZE / PAGE_SIZE); 668 ++loop1; 669 } 670 } 671 672 /* This should never be able to happen but better confirm that. */ 673 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 674 panic("initarm: Failed to align the kernel page directory"); 675 676 LEDSTEP(); 677 678 /* 679 * Allocate a page for the system page mapped to V0x00000000 680 * This page will just contain the system vectors and can be 681 * shared by all processes. 682 */ 683 alloc_pages(systempage.pv_pa, 1); 684 685 /* Allocate stacks for all modes */ 686 valloc_pages(irqstack, IRQ_STACK_SIZE); 687 valloc_pages(abtstack, ABT_STACK_SIZE); 688 valloc_pages(undstack, UND_STACK_SIZE); 689 valloc_pages(kernelstack, UPAGES); 690 691 /* Allocate enough pages for cleaning the Mini-Data cache. */ 692 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 693 valloc_pages(minidataclean, 1); 694 695 #ifdef VERBOSE_INIT_ARM 696 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 697 irqstack.pv_va); 698 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 699 abtstack.pv_va); 700 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 701 undstack.pv_va); 702 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 703 kernelstack.pv_va); 704 #endif 705 706 /* 707 * XXX Defer this to later so that we can reclaim the memory 708 * XXX used by the RedBoot page tables. 709 */ 710 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 711 712 /* 713 * Ok we have allocated physical pages for the primary kernel 714 * page tables 715 */ 716 717 #ifdef VERBOSE_INIT_ARM 718 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 719 #endif 720 721 /* 722 * Now we start construction of the L1 page table 723 * We start by mapping the L2 page tables into the L1. 724 * This means that we can replace L1 mappings later on if necessary 725 */ 726 l1pagetable = kernel_l1pt.pv_pa; 727 728 /* Map the L2 pages tables in the L1 page table */ 729 pmap_link_l2pt(l1pagetable, 0x00000000, 730 &kernel_pt_table[KERNEL_PT_SYS]); 731 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 732 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 733 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 734 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 735 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 736 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 737 738 /* update the top of the kernel VM */ 739 pmap_curmaxkvaddr = 740 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 741 742 #ifdef VERBOSE_INIT_ARM 743 printf("Mapping kernel\n"); 744 #endif 745 746 /* Now we fill in the L2 pagetable for the kernel static code/data */ 747 { 748 extern char etext[], _end[]; 749 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 750 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 751 u_int logical; 752 753 textsize = (textsize + PGOFSET) & ~PGOFSET; 754 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 755 756 logical = 0x00200000; /* offset of kernel in RAM */ 757 758 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 759 physical_start + logical, textsize, 760 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 761 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 762 physical_start + logical, totalsize - textsize, 763 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 764 } 765 766 #ifdef VERBOSE_INIT_ARM 767 printf("Constructing L2 page tables\n"); 768 #endif 769 770 /* Map the stack pages */ 771 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 772 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 773 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 774 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 775 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 776 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 777 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 778 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 779 780 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 781 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 782 783 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 784 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 785 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 786 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 787 } 788 789 /* Map the Mini-Data cache clean area. */ 790 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 791 minidataclean.pv_pa); 792 793 /* Map the vector page. */ 794 #if 1 795 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 796 * cache-clean code there. */ 797 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 798 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 799 #else 800 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 801 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 802 #endif 803 804 /* 805 * map integrated peripherals at same address in l1pagetable 806 * so that we can continue to use console. 807 */ 808 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 809 810 /* 811 * Give the XScale global cache clean code an appropriately 812 * sized chunk of unmapped VA space starting at 0xff000000 813 * (our device mappings end before this address). 814 */ 815 xscale_cache_clean_addr = 0xff000000U; 816 817 /* 818 * Now we have the real page tables in place so we can switch to them. 819 * Once this is done we will be running with the REAL kernel page 820 * tables. 821 */ 822 823 /* 824 * Update the physical_freestart/physical_freeend/free_pages 825 * variables. 826 */ 827 { 828 extern char _end[]; 829 830 physical_freestart = physical_start + 831 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 832 KERNEL_BASE); 833 physical_freeend = physical_end; 834 free_pages = 835 (physical_freeend - physical_freestart) / PAGE_SIZE; 836 } 837 838 /* Switch tables */ 839 #ifdef VERBOSE_INIT_ARM 840 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 841 physical_freestart, free_pages, free_pages); 842 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 843 #endif 844 845 LEDSTEP(); 846 847 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 848 cpu_setttb(kernel_l1pt.pv_pa, true); 849 cpu_tlb_flushID(); 850 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 851 LEDSTEP(); 852 853 /* 854 * Moved from cpu_startup() as data_abort_handler() references 855 * this during uvm init 856 */ 857 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 858 859 #ifdef VERBOSE_INIT_ARM 860 printf("bootstrap done.\n"); 861 #endif 862 863 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 864 865 /* 866 * Pages were allocated during the secondary bootstrap for the 867 * stacks for different CPU modes. 868 * We must now set the r13 registers in the different CPU modes to 869 * point to these stacks. 870 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 871 * of the stack memory. 872 */ 873 printf("init subsystems: stacks "); 874 875 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 876 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 877 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 878 879 /* 880 * Well we should set a data abort handler. 881 * Once things get going this will change as we will need a proper 882 * handler. 883 * Until then we will use a handler that just panics but tells us 884 * why. 885 * Initialisation of the vectors will just panic on a data abort. 886 * This just fills in a slightly better one. 887 */ 888 printf("vectors "); 889 data_abort_handler_address = (u_int)data_abort_handler; 890 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 891 undefined_handler_address = (u_int)undefinedinstruction_bounce; 892 893 /* Initialise the undefined instruction handlers */ 894 printf("undefined "); 895 undefined_init(); 896 897 /* Load memory into UVM. */ 898 printf("page "); 899 uvm_md_init(); 900 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 901 atop(physical_freestart), atop(physical_freeend), 902 VM_FREELIST_DEFAULT); 903 904 /* Boot strap pmap telling it where managed kernel virtual memory is */ 905 printf("pmap "); 906 LEDSTEP(); 907 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 908 LEDSTEP(); 909 910 #ifdef __HAVE_MEMORY_DISK__ 911 md_root_setconf(memory_disk, sizeof memory_disk); 912 #endif 913 914 { 915 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 916 917 if (0 == (sw & (1<<13))) /* check S19 */ 918 boothowto |= RB_KDB; 919 if (0 == (sw & (1<<12))) /* S20 */ 920 boothowto |= RB_SINGLE; 921 } 922 923 LEDSTEP(); 924 925 #ifdef KGDB 926 if (boothowto & RB_KDB) { 927 kgdb_debug_init = 1; 928 kgdb_connect(1); 929 } 930 #endif 931 932 #ifdef DDB 933 db_machine_init(); 934 935 /* Firmware doesn't load symbols. */ 936 ddb_init(0, NULL, NULL); 937 938 if (boothowto & RB_KDB) 939 Debugger(); 940 #endif 941 942 /* We return the new stack pointer address */ 943 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 944 } 945 946 #if 0 947 void 948 process_kernel_args(char *args) 949 { 950 951 boothowto = 0; 952 953 /* Make a local copy of the bootargs */ 954 strncpy(bootargs, args, MAX_BOOT_STRING); 955 956 args = bootargs; 957 boot_file = bootargs; 958 959 /* Skip the kernel image filename */ 960 while (*args != ' ' && *args != 0) 961 ++args; 962 963 if (*args != 0) 964 *args++ = 0; 965 966 while (*args == ' ') 967 ++args; 968 969 boot_args = args; 970 971 printf("bootfile: %s\n", boot_file); 972 printf("bootargs: %s\n", boot_args); 973 974 parse_mi_bootargs(boot_args); 975 } 976 #endif 977 978 #ifdef KGDB 979 #ifndef KGDB_DEVNAME 980 #define KGDB_DEVNAME "ffuart" 981 #endif 982 const char kgdb_devname[] = KGDB_DEVNAME; 983 984 #if (NCOM > 0) 985 #ifndef KGDB_DEVMODE 986 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 987 #endif 988 int comkgdbmode = KGDB_DEVMODE; 989 #endif /* NCOM */ 990 991 #endif /* KGDB */ 992 993 994 void 995 consinit(void) 996 { 997 static int consinit_called = 0; 998 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 999 #if 0 1000 char *console = CONSDEVNAME; 1001 #endif 1002 1003 if (consinit_called != 0) 1004 return; 1005 1006 consinit_called = 1; 1007 1008 #if NCOM > 0 1009 1010 #ifdef FFUARTCONSOLE 1011 /* Check switch. */ 1012 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1013 /* We don't use FF serial when S17=no-dot position */ 1014 } 1015 #ifdef KGDB 1016 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1017 /* port is reserved for kgdb */ 1018 } 1019 #endif 1020 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1021 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1022 #if 0 1023 /* XXX: can't call pxa2x0_clkman_config yet */ 1024 pxa2x0_clkman_config(CKEN_FFUART, 1); 1025 #else 1026 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1027 ckenreg|CKEN_FFUART); 1028 #endif 1029 1030 return; 1031 } 1032 #endif /* FFUARTCONSOLE */ 1033 1034 #ifdef BTUARTCONSOLE 1035 #ifdef KGDB 1036 if (0 == strcmp(kgdb_devname, "btuart")) { 1037 /* port is reserved for kgdb */ 1038 } else 1039 #endif 1040 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1041 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1042 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1043 ckenreg|CKEN_BTUART); 1044 return; 1045 } 1046 #endif /* BTUARTCONSOLE */ 1047 1048 1049 #endif /* NCOM */ 1050 1051 } 1052 1053 #ifdef KGDB 1054 void 1055 kgdb_port_init(void) 1056 { 1057 #if (NCOM > 0) && defined(COM_PXA2X0) 1058 paddr_t paddr = 0; 1059 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1060 1061 if (0 == strcmp(kgdb_devname, "ffuart")) { 1062 paddr = PXA2X0_FFUART_BASE; 1063 ckenreg |= CKEN_FFUART; 1064 } 1065 else if (0 == strcmp(kgdb_devname, "btuart")) { 1066 paddr = PXA2X0_BTUART_BASE; 1067 ckenreg |= CKEN_BTUART; 1068 } 1069 1070 if (paddr && 1071 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1072 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1073 1074 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1075 } 1076 #endif 1077 } 1078 #endif 1079 1080 #if 0 1081 /* 1082 * display a number in hex LED. 1083 * a digit is blank when the corresponding bit in arg blank is 1 1084 */ 1085 unsigned short led_control_value = 0; 1086 1087 void 1088 hex_led_blank(uint32_t value, int blank) 1089 { 1090 int save = disable_interrupts(I32_bit); 1091 1092 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1093 led_control_value = (led_control_value & 0xff) 1094 | ((blank & 0xff)<<8); 1095 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1096 restore_interrupts(save); 1097 } 1098 #endif 1099
Indexes created Wed Oct 22 13:09:56 GMT 2025