1 /* $NetBSD: iyonix_machdep.c,v 1.34 2023/10/12 11:33:39 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Based on code written by Jason R. Thorpe and Steve C. Woodford for 8 * Wasabi Systems, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed for the NetBSD Project by 21 * Wasabi Systems, Inc. 22 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 23 * or promote products derived from this software without specific prior 24 * written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1997,1998 Mark Brinicombe. 41 * Copyright (c) 1997,1998 Causality Limited. 42 * All rights reserved. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 3. All advertising materials mentioning features or use of this software 53 * must display the following acknowledgement: 54 * This product includes software developed by Mark Brinicombe 55 * for the NetBSD Project. 56 * 4. The name of the company nor the name of the author may be used to 57 * endorse or promote products derived from this software without specific 58 * prior written permission. 59 * 60 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 61 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 62 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 63 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 64 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 65 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 66 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 67 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 68 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 69 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 70 * SUCH DAMAGE. 71 * 72 * Machine dependent functions for kernel setup for Iyonix. 73 */ 74 75 #include <sys/cdefs.h> 76 __KERNEL_RCSID(0, "$NetBSD: iyonix_machdep.c,v 1.34 2023/10/12 11:33:39 skrll Exp $"); 77 78 #include "opt_ddb.h" 79 #include "opt_kgdb.h" 80 81 #include <sys/param.h> 82 #include <sys/device.h> 83 #include <sys/systm.h> 84 #include <sys/kernel.h> 85 #include <sys/exec.h> 86 #include <sys/proc.h> 87 #include <sys/msgbuf.h> 88 #include <sys/reboot.h> 89 #include <sys/termios.h> 90 #include <sys/ksyms.h> 91 #include <sys/bus.h> 92 #include <sys/cpu.h> 93 94 #include <uvm/uvm_extern.h> 95 96 #include <dev/cons.h> 97 98 #include <dev/pci/ppbreg.h> 99 #include <dev/ic/i8259reg.h> 100 101 #include <net/if.h> 102 #include <net/if_ether.h> 103 104 #include <machine/db_machdep.h> 105 #include <ddb/db_sym.h> 106 #include <ddb/db_extern.h> 107 108 #include <acorn32/include/bootconfig.h> 109 #include <arm/locore.h> 110 #include <arm/undefined.h> 111 112 #include <arm/arm32/machdep.h> 113 114 #include <arm/xscale/i80321reg.h> 115 #include <arm/xscale/i80321var.h> 116 117 #include <iyonix/iyonix/iyonixreg.h> 118 #include <iyonix/iyonix/obiovar.h> 119 120 #include "ksyms.h" 121 122 #define KERNEL_TEXT_BASE KERNEL_BASE 123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 124 125 /* 126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 128 */ 129 #define KERNEL_VM_SIZE 0x0C000000 130 131 struct bootconfig bootconfig; /* Boot config storage */ 132 133 char *boot_args; 134 135 vaddr_t physical_start; 136 vaddr_t physical_freestart; 137 vaddr_t physical_freeend; 138 vaddr_t physical_end; 139 u_int free_pages; 140 vaddr_t pagetables_start; 141 142 /*int debug_flags;*/ 143 #ifndef PMAP_STATIC_L1S 144 int max_processes = 64; /* Default number */ 145 #endif /* !PMAP_STATIC_L1S */ 146 147 /* Physical and virtual addresses for some global pages */ 148 pv_addr_t minidataclean; 149 150 paddr_t msgbufphys; 151 152 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */ 153 154 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */ 155 #define KERNEL_PT_KERNEL_NUM 4 156 157 /* L2 table for mapping i80321 */ 158 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 159 160 /* L2 tables for mapping kernel VM */ 161 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1) 162 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 163 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 164 165 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 166 167 char iyonix_macaddr[ETHER_ADDR_LEN]; 168 169 char boot_consdev[16]; 170 171 /* Prototypes */ 172 173 void iyonix_pic_init(void); 174 void iyonix_read_machineid(void); 175 176 void consinit(void); 177 178 static void consinit_com(const char *consdev); 179 static void consinit_genfb(const char *consdev); 180 static void process_kernel_args(void); 181 static void parse_iyonix_bootargs(char *args); 182 183 #include "com.h" 184 #if NCOM > 0 185 #include <dev/ic/comreg.h> 186 #include <dev/ic/comvar.h> 187 #endif 188 189 #include "genfb.h" 190 191 #if (NGENFB == 0) && (NCOM == 0) 192 # error "No valid console device (com or genfb)" 193 #elif defined(COMCONSOLE) || (NGENFB == 0) 194 # define DEFAULT_CONSDEV "com" 195 #else 196 # define DEFAULT_CONSDEV "genfb" 197 #endif 198 199 /* 200 * Define the default console speed for the machine. 201 */ 202 #ifndef CONSPEED 203 #define CONSPEED B9600 204 #endif /* ! CONSPEED */ 205 206 #ifndef CONUNIT 207 #define CONUNIT 0 208 #endif 209 210 #ifndef CONMODE 211 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ 212 #endif 213 214 int comcnspeed = CONSPEED; 215 int comcnmode = CONMODE; 216 int comcnunit = CONUNIT; 217 218 #if KGDB 219 #ifndef KGDB_DEVNAME 220 #error Must define KGDB_DEVNAME 221 #endif 222 const char kgdb_devname[] = KGDB_DEVNAME; 223 224 #ifndef KGDB_DEVADDR 225 #error Must define KGDB_DEVADDR 226 #endif 227 unsigned long kgdb_devaddr = KGDB_DEVADDR; 228 229 #ifndef KGDB_DEVRATE 230 #define KGDB_DEVRATE CONSPEED 231 #endif 232 int kgdb_devrate = KGDB_DEVRATE; 233 234 #ifndef KGDB_DEVMODE 235 #define KGDB_DEVMODE CONMODE 236 #endif 237 int kgdb_devmode = KGDB_DEVMODE; 238 #endif /* KGDB */ 239 240 /* 241 * void cpu_reboot(int howto, char *bootstr) 242 * 243 * Reboots the system 244 * 245 * Deal with any syncing, unmounting, dumping and shutdown hooks, 246 * then reset the CPU. 247 */ 248 void 249 cpu_reboot(int howto, char *bootstr) 250 { 251 252 /* 253 * If we are still cold then hit the air brakes 254 * and crash to earth fast 255 */ 256 if (cold) { 257 doshutdownhooks(); 258 pmf_system_shutdown(boothowto); 259 printf("The operating system has halted.\n"); 260 printf("Please press any key to reboot.\n\n"); 261 cngetc(); 262 printf("rebooting...\n"); 263 goto reset; 264 } 265 266 /* Disable console buffering */ 267 268 /* 269 * If RB_NOSYNC was not specified sync the discs. 270 * Note: Unless cold is set to 1 here, syslogd will die during the 271 * unmount. It looks like syslogd is getting woken up only to find 272 * that it cannot page part of the binary in as the filesystem has 273 * been unmounted. 274 */ 275 if (!(howto & RB_NOSYNC)) 276 bootsync(); 277 278 /* Say NO to interrupts */ 279 splhigh(); 280 281 /* Do a dump if requested. */ 282 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 283 dumpsys(); 284 285 /* Run any shutdown hooks */ 286 doshutdownhooks(); 287 288 pmf_system_shutdown(boothowto); 289 290 /* Make sure IRQ's are disabled */ 291 IRQdisable; 292 293 if (howto & RB_HALT) { 294 printf("The operating system has halted.\n"); 295 printf("Please press any key to reboot.\n\n"); 296 cngetc(); 297 } 298 299 printf("rebooting...\n\r"); 300 reset: 301 /* 302 * Make really really sure that all interrupts are disabled, 303 * and poke the Internal Bus and Peripheral Bus reset lines. 304 */ 305 (void) disable_interrupts(I32_bit|F32_bit); 306 *(volatile uint32_t *)(IYONIX_80321_VBASE + VERDE_ATU_BASE + 307 ATU_PCSR) = PCSR_RIB | PCSR_RPB; 308 309 /* ...and if that didn't work, just croak. */ 310 printf("RESET FAILED!\n"); 311 for (;;); 312 } 313 314 /* Static device mappings. */ 315 static const struct pmap_devmap iyonix_devmap[] = { 316 /* 317 * Map the on-board devices VA == PA so that we can access them 318 * with the MMU on or off. 319 */ 320 DEVMAP_ENTRY( 321 IYONIX_OBIO_BASE, 322 IYONIX_OBIO_BASE, 323 IYONIX_OBIO_SIZE 324 ), 325 326 DEVMAP_ENTRY( 327 IYONIX_IOW_VBASE, 328 VERDE_OUT_XLATE_IO_WIN0_BASE, 329 VERDE_OUT_XLATE_IO_WIN_SIZE 330 ), 331 332 DEVMAP_ENTRY( 333 IYONIX_80321_VBASE, 334 VERDE_PMMR_BASE, 335 VERDE_PMMR_SIZE 336 ), 337 338 DEVMAP_ENTRY( 339 IYONIX_FLASH_BASE, 340 IYONIX_FLASH_BASE, 341 IYONIX_FLASH_SIZE 342 ), 343 344 DEVMAP_ENTRY_END 345 }; 346 347 /* Read out the Machine ID from the flash, and stash it away for later use. */ 348 349 void 350 iyonix_read_machineid(void) 351 { 352 volatile uint32_t *flashbase = (uint32_t *)IYONIX_FLASH_BASE; 353 volatile uint16_t *flashword = (uint16_t *)IYONIX_FLASH_BASE; 354 union { 355 uint32_t w[2]; 356 uint8_t b[8]; 357 } machid; 358 359 /* Enter SecSi Sector Region */ 360 flashword[0x555] = 0xAA; 361 flashword[0x2AA] = 0x55; 362 flashword[0x555] = 0x88; 363 364 machid.w[0] = flashbase[0]; 365 machid.w[1] = flashbase[1]; 366 367 iyonix_macaddr[0] = machid.b[6]; 368 iyonix_macaddr[1] = machid.b[5]; 369 iyonix_macaddr[2] = machid.b[4]; 370 iyonix_macaddr[3] = machid.b[3]; 371 iyonix_macaddr[4] = machid.b[2]; 372 iyonix_macaddr[5] = machid.b[1]; 373 374 /* Exit SecSi Sector Region */ 375 flashword[0x555] = 0xAA; 376 flashword[0x2AA] = 0x55; 377 flashword[0x555] = 0x90; 378 flashword[0x555] = 0x00; 379 } 380 381 #define IYONIX_PIC_WRITE(a,v) (*((char *)IYONIX_OBIO_BASE + (a)) = (v)) 382 383 void 384 iyonix_pic_init(void) 385 { 386 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT); 387 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW2, ICW2_IRL(0)); 388 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW3, ICW3_CASCADE(2)); 389 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_ICW4, ICW4_8086); 390 IYONIX_PIC_WRITE(IYONIX_MASTER_PIC + PIC_OCW1, 0x0); /* Unmask */ 391 392 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW1, ICW1_IC4|ICW1_SELECT); 393 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW2, ICW2_IRL(0)); 394 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW3, ICW3_CASCADE(1)); 395 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_ICW4, ICW4_8086); 396 IYONIX_PIC_WRITE(IYONIX_SLAVE_PIC + PIC_OCW1, 0x0); /* Unmask */ 397 398 } 399 400 /* 401 * vaddr_t initarm(...) 402 * 403 * Initial entry point on startup. This gets called before main() is 404 * entered. 405 * It should be responsible for setting up everything that must be 406 * in place when main is called. 407 * This includes 408 * Taking a copy of the boot configuration structure. 409 * Initialising the physical console so characters can be printed. 410 * Setting up page tables for the kernel 411 * Initialising interrupt controllers to a sane default state 412 */ 413 vaddr_t 414 initarm(void *arg) 415 { 416 struct bootconfig *passed_bootconfig = arg; 417 extern char _end[]; 418 int loop; 419 int loop1; 420 u_int l1pagetable; 421 paddr_t memstart = 0; 422 psize_t memsize = 0; 423 424 /* Calibrate the delay loop. */ 425 i80321_calibrate_delay(); 426 427 /* Ensure bootconfig has valid magic */ 428 if (passed_bootconfig->magic != BOOTCONFIG_MAGIC) 429 printf("Bad bootconfig magic: %x\n", bootconfig.magic); 430 431 bootconfig = *passed_bootconfig; 432 433 /* Fake bootconfig structure for anything that still needs it */ 434 /* XXX must make the memory description h/w independent */ 435 bootconfig.dram[0].address = memstart; 436 bootconfig.dram[0].pages = memsize / PAGE_SIZE; 437 bootconfig.dramblocks = 1; 438 439 /* process arguments - can update boothowto */ 440 process_kernel_args(); 441 442 /* 443 * Since we map the on-board devices VA==PA, and the kernel 444 * is running VA==PA, it's possible for us to initialize 445 * the console now. 446 */ 447 consinit(); 448 449 #ifdef VERBOSE_INIT_ARM 450 /* Talk to the user */ 451 printf("\nNetBSD/iyonix booting ...\n"); 452 #endif 453 454 /* 455 * Heads up ... Setup the CPU / MMU / TLB functions 456 */ 457 if (set_cpufuncs()) 458 panic("cpu not recognized!"); 459 460 /* 461 * We are currently running with the MMU enabled and the 462 * entire address space mapped VA==PA. 463 */ 464 465 /* 466 * Fetch the SDRAM start/size from the i80321 SDRAM configuration 467 * registers. 468 */ 469 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE, 470 &memstart, &memsize); 471 472 #ifdef VERBOSE_INIT_ARM 473 printf("initarm: Configuring system ...\n"); 474 #endif 475 476 /* 477 * Set up the variables that define the availability of 478 * physical memory. 479 */ 480 physical_start = memstart; 481 physical_end = physical_start + memsize; 482 483 physical_freestart = physical_start + 484 (((uintptr_t) _end - KERNEL_TEXT_BASE + PGOFSET) & ~PGOFSET); 485 physical_freeend = physical_end; 486 487 physmem = (physical_end - physical_start) / PAGE_SIZE; 488 489 #ifdef VERBOSE_INIT_ARM 490 /* Tell the user about the memory */ 491 printf("physmemory: %ld pages at 0x%08lx -> 0x%08lx\n", physmem, 492 physical_start, physical_end - 1); 493 #endif 494 495 /* 496 * The kernel is loaded at the base of physical memory. We allocate 497 * pages upwards from the top of the kernel. 498 * 499 * We need to allocate some fixed page tables to get the kernel 500 * going. We allocate one page directory and a number of page 501 * tables and store the physical addresses in the kernel_pt_table 502 * array. 503 * 504 * The kernel page directory must be on a 16K boundary. The page 505 * tables must be on 4K boundaries. What we do is allocate the 506 * page directory on the first 16K boundary that we encounter, and 507 * the page tables on 4K boundaries otherwise. Since we allocate 508 * at least 3 L2 page tables, we are guaranteed to encounter at 509 * least one 16K aligned region. 510 */ 511 512 #ifdef VERBOSE_INIT_ARM 513 printf("Allocating page tables\n"); 514 #endif 515 516 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 517 518 #ifdef VERBOSE_INIT_ARM 519 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 520 physical_freestart, free_pages, free_pages); 521 #endif 522 523 /* Define a macro to simplify memory allocation */ 524 #define valloc_pages(var, np) \ 525 alloc_pages((var).pv_pa, (np)); \ 526 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 527 528 #define alloc_pages(var, np) \ 529 (var) = physical_freestart; \ 530 physical_freestart += ((np) * PAGE_SIZE); \ 531 if (physical_freeend < physical_freestart) \ 532 panic("initarm: out of memory"); \ 533 free_pages -= (np); \ 534 memset((char *)(var), 0, ((np) * PAGE_SIZE)); 535 536 loop1 = 0; 537 kernel_l1pt.pv_pa = kernel_l1pt.pv_va = 0; 538 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 539 /* Are we 16KB aligned for an L1 ? */ 540 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 541 && kernel_l1pt.pv_pa == 0) { 542 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 543 } else { 544 valloc_pages(kernel_pt_table[loop1], 545 L2_TABLE_SIZE / PAGE_SIZE); 546 ++loop1; 547 } 548 } 549 550 /* This should never be able to happen but better confirm that. */ 551 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 552 panic("initarm: Failed to align the kernel page directory"); 553 554 /* 555 * Allocate a page for the system page mapped to V0x00000000 556 * This page will just contain the system vectors and can be 557 * shared by all processes. 558 */ 559 alloc_pages(systempage.pv_pa, 1); 560 561 /* Allocate stacks for all modes */ 562 valloc_pages(irqstack, IRQ_STACK_SIZE); 563 valloc_pages(abtstack, ABT_STACK_SIZE); 564 valloc_pages(undstack, UND_STACK_SIZE); 565 valloc_pages(kernelstack, UPAGES); 566 567 /* Allocate enough pages for cleaning the Mini-Data cache. */ 568 #ifdef DIAGNOSTIC 569 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE); 570 #endif 571 valloc_pages(minidataclean, 1); 572 573 #ifdef VERBOSE_INIT_ARM 574 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 575 irqstack.pv_va); 576 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 577 abtstack.pv_va); 578 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 579 undstack.pv_va); 580 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 581 kernelstack.pv_va); 582 #endif 583 584 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 585 586 /* 587 * Ok we have allocated physical pages for the primary kernel 588 * page tables 589 */ 590 591 #ifdef VERBOSE_INIT_ARM 592 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 593 #endif 594 595 /* 596 * Now we start construction of the L1 page table 597 * We start by mapping the L2 page tables into the L1. 598 * This means that we can replace L1 mappings later on if necessary 599 */ 600 l1pagetable = kernel_l1pt.pv_pa; 601 602 /* Map the L2 pages tables in the L1 page table */ 603 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 604 &kernel_pt_table[KERNEL_PT_SYS]); 605 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 606 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 607 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 608 pmap_link_l2pt(l1pagetable, IYONIX_IOPXS_VBASE, 609 &kernel_pt_table[KERNEL_PT_IOPXS]); 610 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 611 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 612 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 613 614 /* update the top of the kernel VM */ 615 pmap_curmaxkvaddr = 616 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 617 618 #ifdef VERBOSE_INIT_ARM 619 printf("Mapping kernel\n"); 620 #endif 621 622 /* Now we fill in the L2 pagetable for the kernel static code/data */ 623 { 624 extern char etext[], _end[]; 625 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 626 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 627 u_int logical; 628 629 textsize = (textsize + PGOFSET) & ~PGOFSET; 630 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 631 632 logical = 0; /* offset of kernel in RAM */ 633 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 634 physical_start + logical, textsize, 635 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 636 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 637 physical_start + logical, totalsize - textsize, 638 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 639 } 640 641 #ifdef VERBOSE_INIT_ARM 642 printf("Constructing L2 page tables\n"); 643 #endif 644 645 /* Map the stack pages */ 646 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 647 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 648 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 649 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 650 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 651 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 652 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 653 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 654 655 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 656 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 657 658 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 659 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 660 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 661 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 662 } 663 664 /* Map the Mini-Data cache clean area. */ 665 xscale_setup_minidata(l1pagetable, minidataclean.pv_va, 666 minidataclean.pv_pa); 667 668 /* Map the vector page. */ 669 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 670 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 671 672 /* Map the statically mapped devices. */ 673 pmap_devmap_bootstrap(l1pagetable, iyonix_devmap); 674 675 /* 676 * Give the XScale global cache clean code an appropriately 677 * sized chunk of unmapped VA space starting at 0xff000000 678 * (our device mappings end before this address). 679 */ 680 xscale_cache_clean_addr = 0xff000000U; 681 682 /* 683 * Now we have the real page tables in place so we can switch to them. 684 * Once this is done we will be running with the REAL kernel page 685 * tables. 686 */ 687 688 /* Switch tables */ 689 #ifdef VERBOSE_INIT_ARM 690 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 691 physical_freestart, free_pages, free_pages); 692 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa); 693 #endif 694 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 695 cpu_setttb(kernel_l1pt.pv_pa, true); 696 cpu_tlb_flushID(); 697 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 698 699 iyonix_read_machineid(); 700 701 /* 702 * Moved from cpu_startup() as data_abort_handler() references 703 * this during uvm init 704 */ 705 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 706 707 #ifdef VERBOSE_INIT_ARM 708 printf("done!\n"); 709 #endif 710 711 #ifdef VERBOSE_INIT_ARM 712 printf("bootstrap done.\n"); 713 #endif 714 715 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 716 717 /* 718 * Pages were allocated during the secondary bootstrap for the 719 * stacks for different CPU modes. 720 * We must now set the r13 registers in the different CPU modes to 721 * point to these stacks. 722 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 723 * of the stack memory. 724 */ 725 #ifdef VERBOSE_INIT_ARM 726 printf("init subsystems: stacks "); 727 #endif 728 729 set_stackptr(PSR_IRQ32_MODE, 730 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 731 set_stackptr(PSR_ABT32_MODE, 732 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 733 set_stackptr(PSR_UND32_MODE, 734 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 735 736 /* 737 * Well we should set a data abort handler. 738 * Once things get going this will change as we will need a proper 739 * handler. 740 * Until then we will use a handler that just panics but tells us 741 * why. 742 * Initialisation of the vectors will just panic on a data abort. 743 * This just fills in a slightly better one. 744 */ 745 #ifdef VERBOSE_INIT_ARM 746 printf("vectors "); 747 #endif 748 data_abort_handler_address = (u_int)data_abort_handler; 749 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 750 undefined_handler_address = (u_int)undefinedinstruction_bounce; 751 752 /* Initialise the undefined instruction handlers */ 753 #ifdef VERBOSE_INIT_ARM 754 printf("undefined "); 755 #endif 756 undefined_init(); 757 758 /* Load memory into UVM. */ 759 #ifdef VERBOSE_INIT_ARM 760 printf("page "); 761 #endif 762 uvm_md_init(); 763 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 764 atop(physical_freestart), atop(physical_freeend), 765 VM_FREELIST_DEFAULT); 766 767 /* Boot strap pmap telling it where managed kernel virtual memory is */ 768 #ifdef VERBOSE_INIT_ARM 769 printf("pmap "); 770 #endif 771 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 772 773 /* Setup the IRQ system */ 774 #ifdef VERBOSE_INIT_ARM 775 printf("irq "); 776 #endif 777 i80321_intr_init(); 778 779 #ifdef VERBOSE_INIT_ARM 780 printf("done.\n"); 781 #endif 782 783 #ifdef DDB 784 db_machine_init(); 785 if (boothowto & RB_KDB) 786 Debugger(); 787 #endif 788 789 iyonix_pic_init(); 790 791 printf("args: %s\n", bootconfig.args); 792 printf("howto: %x\n", boothowto); 793 794 /* We return the new stack pointer address */ 795 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 796 } 797 798 void 799 consinit(void) 800 { 801 static int consinit_called; 802 803 if (consinit_called != 0) 804 return; 805 806 consinit_called = 1; 807 808 /* We let consinit_<foo> worry about device numbers */ 809 if (strncmp(boot_consdev, "genfb", 5) && 810 strncmp(boot_consdev, "com", 3)) 811 strcpy(boot_consdev, DEFAULT_CONSDEV); 812 813 if (!strncmp(boot_consdev, "com", 3)) 814 consinit_com(boot_consdev); 815 else 816 consinit_genfb(boot_consdev); 817 } 818 819 static void 820 consinit_com(const char *consdev) 821 { 822 static const bus_addr_t comcnaddrs[] = { 823 IYONIX_UART1, /* com0 */ 824 }; 825 /* 826 * Console devices are mapped VA==PA. Our devmap reflects 827 * this, so register it now so drivers can map the console 828 * device. 829 */ 830 pmap_devmap_register(iyonix_devmap); 831 832 /* When we support more than the first serial port as console, 833 * we should check consdev for a number. 834 */ 835 #if NCOM > 0 836 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed, 837 COM_FREQ, COM_TYPE_NORMAL, comcnmode)) 838 { 839 panic("can't init serial console @%lx", comcnaddrs[comcnunit]); 840 } 841 #else 842 panic("serial console @%lx not configured", comcnaddrs[comcnunit]); 843 #endif 844 845 #if KGDB 846 #if NCOM > 0 847 if (strcmp(kgdb_devname, "com") == 0) { 848 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate, 849 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode); 850 } 851 #endif /* NCOM > 0 */ 852 #endif /* KGDB */ 853 } 854 855 static void 856 consinit_genfb(const char *consdev) 857 { 858 /* NOTYET */ 859 } 860 861 static void 862 process_kernel_args(void) 863 { 864 char *args; 865 866 /* Ok now we will check the arguments for interesting parameters. */ 867 args = bootconfig.args; 868 869 #ifdef BOOTHOWTO 870 boothowto = BOOTHOWTO; 871 #else 872 boothowto = 0; 873 #endif 874 875 /* Only arguments itself are passed from the bootloader */ 876 while (*args == ' ') 877 ++args; 878 879 boot_args = args; 880 parse_mi_bootargs(boot_args); 881 parse_iyonix_bootargs(boot_args); 882 } 883 884 static void 885 parse_iyonix_bootargs(char *args) 886 { 887 char *ptr; 888 889 if (get_bootconf_option(args, "consdev", BOOTOPT_TYPE_STRING, &ptr)) 890 { 891 /* ptr may have trailing clutter */ 892 strlcpy(boot_consdev, ptr, sizeof(boot_consdev)); 893 if ( (ptr = strchr(boot_consdev, ' ')) ) 894 *ptr = 0; 895 } 896 } 897
Indexes created Sun Oct 25 00:26:45 UTC 2026