lubbock_machdep.c revision 1.42.4.1
1 /* $NetBSD: lubbock_machdep.c,v 1.42.4.1 2023/10/14 06:52:17 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 1.42.4.1 2023/10/14 06:52:17 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 int loop; 414 int loop1; 415 u_int l1pagetable; 416 paddr_t memstart; 417 psize_t memsize; 418 int led_data = 0; 419 #define LEDSTEP_P() ioreg_write(LUBBOCK_OBIO_PBASE+LUBBOCK_HEXLED, led_data++) 420 #define LEDSTEP() hex_led(led_data++) 421 422 /* use physical address until pagetable is set */ 423 LEDSTEP_P(); 424 425 /* map some peripheral registers at static I/O area */ 426 pmap_devmap_bootstrap((vaddr_t)read_ttb(), lubbock_devmap); 427 428 LEDSTEP_P(); 429 430 /* start 32.768 kHz OSC */ 431 ioreg_write(LUBBOCK_CLKMAN_VBASE + 0x08, 2); 432 /* Get ready for splfoo() */ 433 pxa2x0_intr_bootstrap(LUBBOCK_INTCTL_VBASE); 434 435 LEDSTEP(); 436 437 /* 438 * Heads up ... Setup the CPU / MMU / TLB functions 439 */ 440 if (set_cpufuncs()) 441 panic("cpu not recognized!"); 442 443 LEDSTEP(); 444 445 446 #if 0 447 /* Calibrate the delay loop. */ 448 #endif 449 450 /* 451 * Okay, RedBoot has provided us with the following memory map: 452 * 453 * Physical Address Range Description 454 * ----------------------- ---------------------------------- 455 * 0x00000000 - 0x01ffffff flash Memory (32MB) 456 * 0x04000000 - 0x05ffffff Application flash Memory (32MB) 457 * 0x08000000 - 0x080000ff I/O baseboard registers 458 * 0x0a000000 - 0x0a0fffff SRAM (1MB) 459 * 0x0c000000 - 0x0c0fffff Ethernet Controller 460 * 0x0e000000 - 0x0e0fffff Ethernet Controller (Attribute) 461 * 0x10000000 - 0x103fffff SA-1111 Companion Chip 462 * 0x14000000 - 0x17ffffff Expansion Card (64MB) 463 * 0x40000000 - 0x480fffff Processor Registers 464 * 0xa0000000 - 0xa3ffffff SDRAM Bank 0 (64MB) 465 * 466 * 467 * Virtual Address Range X C B Description 468 * ----------------------- - - - ---------------------------------- 469 * 0x00000000 - 0x00003fff N Y Y SDRAM 470 * 0x00004000 - 0x000fffff N Y N Boot ROM 471 * 0x00100000 - 0x01ffffff N N N Application Flash 472 * 0x04000000 - 0x05ffffff N N N Exp Application Flash 473 * 0x08000000 - 0x080fffff N N N I/O baseboard registers 474 * 0x0a000000 - 0x0a0fffff N N N SRAM 475 * 0x40000000 - 0x480fffff N N N Processor Registers 476 * 0xa0000000 - 0xa000ffff N Y N RedBoot SDRAM 477 * 0xa0017000 - 0xa3ffffff Y Y Y SDRAM 478 * 0xc0000000 - 0xcfffffff Y Y Y Cache Flush Region 479 * (done by this routine) 480 * 0xfd000000 - 0xfd0000ff N N N I/O baseboard registers 481 * 0xfd100000 - 0xfd3fffff N N N Processor Registers. 482 * 0xfd400000 - 0xfd4fffff N N N FF-UART 483 * 0xfd500000 - 0xfd5fffff N N N BT-UART 484 * 485 * RedBoot's first level page table is at 0xa0004000. There 486 * are also 2 second-level tables at 0xa0008000 and 487 * 0xa0008400. We will continue to use them until we switch to 488 * our pagetable by cpu_setttb(). 489 * 490 */ 491 492 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */ 493 pxa2x0_gpio_bootstrap(LUBBOCK_GPIO_VBASE); 494 pxa2x0_gpio_config(lubbock_gpioconf); 495 496 /* turn on clock to UART block. 497 XXX: this should not be done here. */ 498 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART | 499 ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN)); 500 501 LEDSTEP(); 502 503 consinit(); 504 LEDSTEP(); 505 #ifdef KGDB 506 kgdb_port_init(); 507 LEDSTEP(); 508 #endif 509 510 511 /* Talk to the user */ 512 printf("\nNetBSD/evbarm (lubbock) booting ...\n"); 513 514 /* Tweak memory controller */ 515 { 516 /* Modify access timing for CS3 (91c96) */ 517 518 uint32_t tmp = 519 ioreg_read(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1); 520 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MSC1, 521 (tmp & 0xffff) | (0x3881<<16)); 522 /* RRR=3, RDN=8, RDF=8 523 * XXX: can be faster? 524 */ 525 } 526 527 528 /* Initialize for PCMCIA/CF sockets */ 529 { 530 uint32_t tmp; 531 532 /* Activate two sockets. 533 XXX: This code segment should be moved to 534 pcmcia MD attach routine. 535 XXX: These bits should be toggled based on 536 existene of PCMCIA/CF cards 537 */ 538 ioreg_write(PXA2X0_MEMCTL_BASE+MEMCTL_MECR, 539 MECR_NOS|MECR_CIT); 540 541 tmp = ioreg_read(LUBBOCK_SACC_PBASE+SACCSBI_SKCR); 542 ioreg_write(LUBBOCK_SACC_PBASE+SACCSBI_SKCR, 543 (tmp & ~(1<<4)) | (1<<0)); 544 } 545 546 #if 0 547 /* 548 * Examine the boot args string for options we need to know about 549 * now. 550 */ 551 process_kernel_args((char *)nwbootinfo.bt_args); 552 #endif 553 554 { 555 int processor_card_id; 556 557 processor_card_id = 0x000f & 558 ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_MISCRD); 559 switch(processor_card_id){ 560 case 0: 561 /* Cotulla */ 562 memstart = 0xa0000000; 563 memsize = 0x04000000; /* 64MB */ 564 break; 565 case 1: 566 /* XXX: Sabiani */ 567 memstart = 0xa0000000; 568 memsize = 0x04000000; /* 64MB */ 569 break; 570 default: 571 /* XXX: Unknown */ 572 memstart = 0xa0000000; 573 memsize = 0x04000000; /* 64MB */ 574 } 575 } 576 577 printf("initarm: Configuring system ...\n"); 578 579 /* Fake bootconfig structure for the benefit of pmap.c */ 580 /* XXX must make the memory description h/w independent */ 581 bootconfig.dramblocks = 1; 582 bootconfig.dram[0].address = memstart; 583 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 584 585 /* 586 * Set up the variables that define the availability of 587 * physical memory. For now, we're going to set 588 * physical_freestart to 0xa0200000 (where the kernel 589 * was loaded), and allocate the memory we need downwards. 590 * If we get too close to the page tables that RedBoot 591 * set up, we will panic. We will update physical_freestart 592 * and physical_freeend later to reflect what pmap_bootstrap() 593 * wants to see. 594 * 595 * XXX pmap_bootstrap() needs an enema. 596 */ 597 physical_start = bootconfig.dram[0].address; 598 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 599 600 physical_freestart = 0xa0009000UL; 601 physical_freeend = 0xa0200000UL; 602 603 physmem = (physical_end - physical_start) / PAGE_SIZE; 604 605 #ifdef VERBOSE_INIT_ARM 606 /* Tell the user about the memory */ 607 printf("physmemory: %d pages at 0x%08lx -> 0x%08lx\n", physmem, 608 physical_start, physical_end - 1); 609 #endif 610 611 /* 612 * Okay, the kernel starts 2MB in from the bottom of physical 613 * memory. We are going to allocate our bootstrap pages downwards 614 * from there. 615 * 616 * We need to allocate some fixed page tables to get the kernel 617 * going. We allocate one page directory and a number of page 618 * tables and store the physical addresses in the kernel_pt_table 619 * array. 620 * 621 * The kernel page directory must be on a 16K boundary. The page 622 * tables must be on 4K boundaries. What we do is allocate the 623 * page directory on the first 16K boundary that we encounter, and 624 * the page tables on 4K boundaries otherwise. Since we allocate 625 * at least 3 L2 page tables, we are guaranteed to encounter at 626 * least one 16K aligned region. 627 */ 628 629 #ifdef VERBOSE_INIT_ARM 630 printf("Allocating page tables\n"); 631 #endif 632 633 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 634 635 #ifdef VERBOSE_INIT_ARM 636 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 637 physical_freestart, free_pages, free_pages); 638 #endif 639 640 /* Define a macro to simplify memory allocation */ 641 #define valloc_pages(var, np) \ 642 alloc_pages((var).pv_pa, (np)); \ 643 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 644 645 #define alloc_pages(var, np) \ 646 physical_freeend -= ((np) * PAGE_SIZE); \ 647 if (physical_freeend < physical_freestart) \ 648 panic("initarm: out of memory"); \ 649 (var) = physical_freeend; \ 650 free_pages -= (np); \ 651 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 652 653 loop1 = 0; 654 kernel_l1pt.pv_pa = 0; 655 kernel_l1pt.pv_va = 0; 656 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 657 /* Are we 16KB aligned for an L1 ? */ 658 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 659 && kernel_l1pt.pv_pa == 0) { 660 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 661 } else { 662 valloc_pages(kernel_pt_table[loop1], 663 L2_TABLE_SIZE / PAGE_SIZE); 664 ++loop1; 665 } 666 } 667 668 /* This should never be able to happen but better confirm that. */ 669 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 670 panic("initarm: Failed to align the kernel page directory"); 671 672 LEDSTEP(); 673 674 /* 675 * Allocate a page for the system page mapped to V0x00000000 676 * This page will just contain the system vectors and can be 677 * shared by all processes. 678 */ 679 alloc_pages(systempage.pv_pa, 1); 680 681 /* Allocate stacks for all modes */ 682 valloc_pages(irqstack, IRQ_STACK_SIZE); 683 valloc_pages(abtstack, ABT_STACK_SIZE); 684 valloc_pages(undstack, UND_STACK_SIZE); 685 valloc_pages(kernelstack, UPAGES); 686 687 /* Allocate enough pages for cleaning the Mini-Data cache. */ 688 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 689 valloc_pages(minidataclean, 1); 690 691 #ifdef VERBOSE_INIT_ARM 692 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 693 irqstack.pv_va); 694 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 695 abtstack.pv_va); 696 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 697 undstack.pv_va); 698 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 699 kernelstack.pv_va); 700 #endif 701 702 /* 703 * XXX Defer this to later so that we can reclaim the memory 704 * XXX used by the RedBoot page tables. 705 */ 706 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 707 708 /* 709 * Ok we have allocated physical pages for the primary kernel 710 * page tables 711 */ 712 713 #ifdef VERBOSE_INIT_ARM 714 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 715 #endif 716 717 /* 718 * Now we start construction of the L1 page table 719 * We start by mapping the L2 page tables into the L1. 720 * This means that we can replace L1 mappings later on if necessary 721 */ 722 l1pagetable = kernel_l1pt.pv_pa; 723 724 /* Map the L2 pages tables in the L1 page table */ 725 pmap_link_l2pt(l1pagetable, 0x00000000, 726 &kernel_pt_table[KERNEL_PT_SYS]); 727 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 728 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 729 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 730 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 731 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 732 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 733 734 /* update the top of the kernel VM */ 735 pmap_curmaxkvaddr = 736 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 737 738 #ifdef VERBOSE_INIT_ARM 739 printf("Mapping kernel\n"); 740 #endif 741 742 /* Now we fill in the L2 pagetable for the kernel static code/data */ 743 { 744 extern char etext[], _end[]; 745 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 746 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 747 u_int logical; 748 749 textsize = (textsize + PGOFSET) & ~PGOFSET; 750 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 751 752 logical = 0x00200000; /* offset of kernel in RAM */ 753 754 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 755 physical_start + logical, textsize, 756 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 757 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 758 physical_start + logical, totalsize - textsize, 759 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 760 } 761 762 #ifdef VERBOSE_INIT_ARM 763 printf("Constructing L2 page tables\n"); 764 #endif 765 766 /* Map the stack pages */ 767 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 768 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 769 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 770 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 771 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 772 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 773 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 774 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); 775 776 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 777 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); 778 779 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 780 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 781 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 782 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 783 } 784 785 /* Map the Mini-Data cache clean area. */ 786 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 787 minidataclean.pv_pa); 788 789 /* Map the vector page. */ 790 #if 1 791 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the 792 * cache-clean code there. */ 793 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 794 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 795 #else 796 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 797 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 798 #endif 799 800 /* 801 * map integrated peripherals at same address in l1pagetable 802 * so that we can continue to use console. 803 */ 804 pmap_devmap_bootstrap(l1pagetable, lubbock_devmap); 805 806 /* 807 * Give the XScale global cache clean code an appropriately 808 * sized chunk of unmapped VA space starting at 0xff000000 809 * (our device mappings end before this address). 810 */ 811 xscale_cache_clean_addr = 0xff000000U; 812 813 /* 814 * Now we have the real page tables in place so we can switch to them. 815 * Once this is done we will be running with the REAL kernel page 816 * tables. 817 */ 818 819 /* 820 * Update the physical_freestart/physical_freeend/free_pages 821 * variables. 822 */ 823 { 824 extern char _end[]; 825 826 physical_freestart = physical_start + 827 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) - 828 KERNEL_BASE); 829 physical_freeend = physical_end; 830 free_pages = 831 (physical_freeend - physical_freestart) / PAGE_SIZE; 832 } 833 834 /* Switch tables */ 835 #ifdef VERBOSE_INIT_ARM 836 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 837 physical_freestart, free_pages, free_pages); 838 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 839 #endif 840 841 LEDSTEP(); 842 843 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 844 cpu_setttb(kernel_l1pt.pv_pa, true); 845 cpu_tlb_flushID(); 846 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 847 LEDSTEP(); 848 849 /* 850 * Moved from cpu_startup() as data_abort_handler() references 851 * this during uvm init 852 */ 853 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 854 855 #ifdef VERBOSE_INIT_ARM 856 printf("bootstrap done.\n"); 857 #endif 858 859 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 860 861 /* 862 * Pages were allocated during the secondary bootstrap for the 863 * stacks for different CPU modes. 864 * We must now set the r13 registers in the different CPU modes to 865 * point to these stacks. 866 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 867 * of the stack memory. 868 */ 869 printf("init subsystems: stacks "); 870 871 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 872 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 873 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 874 875 /* 876 * Well we should set a data abort handler. 877 * Once things get going this will change as we will need a proper 878 * handler. 879 * Until then we will use a handler that just panics but tells us 880 * why. 881 * Initialisation of the vectors will just panic on a data abort. 882 * This just fills in a slightly better one. 883 */ 884 printf("vectors "); 885 data_abort_handler_address = (u_int)data_abort_handler; 886 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 887 undefined_handler_address = (u_int)undefinedinstruction_bounce; 888 889 /* Initialise the undefined instruction handlers */ 890 printf("undefined "); 891 undefined_init(); 892 893 /* Load memory into UVM. */ 894 printf("page "); 895 uvm_md_init(); 896 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 897 atop(physical_freestart), atop(physical_freeend), 898 VM_FREELIST_DEFAULT); 899 900 /* Boot strap pmap telling it where managed kernel virtual memory is */ 901 printf("pmap "); 902 LEDSTEP(); 903 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 904 LEDSTEP(); 905 906 #ifdef __HAVE_MEMORY_DISK__ 907 md_root_setconf(memory_disk, sizeof memory_disk); 908 #endif 909 910 { 911 uint16_t sw = ioreg16_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW); 912 913 if (0 == (sw & (1<<13))) /* check S19 */ 914 boothowto |= RB_KDB; 915 if (0 == (sw & (1<<12))) /* S20 */ 916 boothowto |= RB_SINGLE; 917 } 918 919 LEDSTEP(); 920 921 #ifdef KGDB 922 if (boothowto & RB_KDB) { 923 kgdb_debug_init = 1; 924 kgdb_connect(1); 925 } 926 #endif 927 928 #ifdef DDB 929 db_machine_init(); 930 931 /* Firmware doesn't load symbols. */ 932 ddb_init(0, NULL, NULL); 933 934 if (boothowto & RB_KDB) 935 Debugger(); 936 #endif 937 938 /* We return the new stack pointer address */ 939 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 940 } 941 942 #if 0 943 void 944 process_kernel_args(char *args) 945 { 946 947 boothowto = 0; 948 949 /* Make a local copy of the bootargs */ 950 strncpy(bootargs, args, MAX_BOOT_STRING); 951 952 args = bootargs; 953 boot_file = bootargs; 954 955 /* Skip the kernel image filename */ 956 while (*args != ' ' && *args != 0) 957 ++args; 958 959 if (*args != 0) 960 *args++ = 0; 961 962 while (*args == ' ') 963 ++args; 964 965 boot_args = args; 966 967 printf("bootfile: %s\n", boot_file); 968 printf("bootargs: %s\n", boot_args); 969 970 parse_mi_bootargs(boot_args); 971 } 972 #endif 973 974 #ifdef KGDB 975 #ifndef KGDB_DEVNAME 976 #define KGDB_DEVNAME "ffuart" 977 #endif 978 const char kgdb_devname[] = KGDB_DEVNAME; 979 980 #if (NCOM > 0) 981 #ifndef KGDB_DEVMODE 982 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 983 #endif 984 int comkgdbmode = KGDB_DEVMODE; 985 #endif /* NCOM */ 986 987 #endif /* KGDB */ 988 989 990 void 991 consinit(void) 992 { 993 static int consinit_called = 0; 994 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 995 #if 0 996 char *console = CONSDEVNAME; 997 #endif 998 999 if (consinit_called != 0) 1000 return; 1001 1002 consinit_called = 1; 1003 1004 #if NCOM > 0 1005 1006 #ifdef FFUARTCONSOLE 1007 /* Check switch. */ 1008 if (0 == (ioreg_read(LUBBOCK_OBIO_VBASE+LUBBOCK_USERSW) & (1<<15))) { 1009 /* We don't use FF serial when S17=no-dot position */ 1010 } 1011 #ifdef KGDB 1012 else if (0 == strcmp(kgdb_devname, "ffuart")) { 1013 /* port is reserved for kgdb */ 1014 } 1015 #endif 1016 else if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE, 1017 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1018 #if 0 1019 /* XXX: can't call pxa2x0_clkman_config yet */ 1020 pxa2x0_clkman_config(CKEN_FFUART, 1); 1021 #else 1022 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1023 ckenreg|CKEN_FFUART); 1024 #endif 1025 1026 return; 1027 } 1028 #endif /* FFUARTCONSOLE */ 1029 1030 #ifdef BTUARTCONSOLE 1031 #ifdef KGDB 1032 if (0 == strcmp(kgdb_devname, "btuart")) { 1033 /* port is reserved for kgdb */ 1034 } else 1035 #endif 1036 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE, 1037 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) { 1038 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, 1039 ckenreg|CKEN_BTUART); 1040 return; 1041 } 1042 #endif /* BTUARTCONSOLE */ 1043 1044 1045 #endif /* NCOM */ 1046 1047 } 1048 1049 #ifdef KGDB 1050 void 1051 kgdb_port_init(void) 1052 { 1053 #if (NCOM > 0) && defined(COM_PXA2X0) 1054 paddr_t paddr = 0; 1055 uint32_t ckenreg = ioreg_read(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN); 1056 1057 if (0 == strcmp(kgdb_devname, "ffuart")) { 1058 paddr = PXA2X0_FFUART_BASE; 1059 ckenreg |= CKEN_FFUART; 1060 } 1061 else if (0 == strcmp(kgdb_devname, "btuart")) { 1062 paddr = PXA2X0_BTUART_BASE; 1063 ckenreg |= CKEN_BTUART; 1064 } 1065 1066 if (paddr && 1067 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr, 1068 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) { 1069 1070 ioreg_write(LUBBOCK_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg); 1071 } 1072 #endif 1073 } 1074 #endif 1075 1076 #if 0 1077 /* 1078 * display a number in hex LED. 1079 * a digit is blank when the corresponding bit in arg blank is 1 1080 */ 1081 unsigned short led_control_value = 0; 1082 1083 void 1084 hex_led_blank(uint32_t value, int blank) 1085 { 1086 int save = disable_interrupts(I32_bit); 1087 1088 ioreg_write(LUBBOCK_OBIO_VBASE+0x10, value); 1089 led_control_value = (led_control_value & 0xff) 1090 | ((blank & 0xff)<<8); 1091 ioreg_write(LUBBOCK_OBIO_VBASE+0x40, led_control_value); 1092 restore_interrupts(save); 1093 } 1094 #endif 1095
Indexes created Wed Oct 29 06:09:47 GMT 2025