ixm1200_machdep.c revision 1.24
1 /* $NetBSD: ixm1200_machdep.c,v 1.24 2003/05/21 22:48:23 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 2002, 2003 5 * Ichiro FUKUHARA <ichiro (at) ichiro.org>. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Ichiro FUKUHARA. 19 * 4. The name of the company nor the name of the author may be used to 20 * endorse or promote products derived from this software without specific 21 * prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 27 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 /* 36 * Copyright (c) 1997,1998 Mark Brinicombe. 37 * Copyright (c) 1997,1998 Causality Limited. 38 * All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. All advertising materials mentioning features or use of this software 49 * must display the following acknowledgement: 50 * This product includes software developed by Mark Brinicombe 51 * for the NetBSD Project. 52 * 4. The name of the company nor the name of the author may be used to 53 * endorse or promote products derived from this software without specific 54 * prior written permission. 55 * 56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 57 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 58 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 60 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 61 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 62 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 63 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 64 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 65 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 66 * SUCH DAMAGE. 67 */ 68 69 #include <sys/cdefs.h> 70 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.24 2003/05/21 22:48:23 thorpej Exp $"); 71 72 #include "opt_ddb.h" 73 #include "opt_pmap_debug.h" 74 75 #include <sys/param.h> 76 #include <sys/device.h> 77 #include <sys/systm.h> 78 #include <sys/kernel.h> 79 #include <sys/exec.h> 80 #include <sys/proc.h> 81 #include <sys/msgbuf.h> 82 #include <sys/reboot.h> 83 #include <sys/termios.h> 84 #include <sys/ksyms.h> 85 86 #include <uvm/uvm_extern.h> 87 88 #include <dev/cons.h> 89 90 #include "ksyms.h" 91 92 #if NKSYMS || defined(DDB) || defined(LKM) 93 #include <machine/db_machdep.h> 94 #include <ddb/db_sym.h> 95 #include <ddb/db_extern.h> 96 #ifndef DB_ELFSIZE 97 #error Must define DB_ELFSIZE! 98 #endif 99 #define ELFSIZE DB_ELFSIZE 100 #include <sys/exec_elf.h> 101 #endif 102 103 #include <machine/bootconfig.h> 104 #include <machine/bus.h> 105 #include <machine/cpu.h> 106 #include <machine/frame.h> 107 #include <arm/undefined.h> 108 109 #include <arm/arm32/machdep.h> 110 111 #include <arm/ixp12x0/ixp12x0reg.h> 112 #include <arm/ixp12x0/ixp12x0var.h> 113 #include <arm/ixp12x0/ixp12x0_comreg.h> 114 #include <arm/ixp12x0/ixp12x0_comvar.h> 115 #include <arm/ixp12x0/ixp12x0_pcireg.h> 116 117 #include <evbarm/ixm1200/ixm1200reg.h> 118 #include <evbarm/ixm1200/ixm1200var.h> 119 120 #include "opt_ipkdb.h" 121 122 /* XXX for consinit related hacks */ 123 #include <sys/conf.h> 124 125 void ixp12x0_reset(void) __attribute__((noreturn)); 126 127 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 128 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 129 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 130 131 /* 132 * Address to call from cpu_reset() to reset the machine. 133 * This is machine architecture dependant as it varies depending 134 * on where the ROM appears when you turn the MMU off. 135 */ 136 137 u_int cpu_reset_address = (u_int) ixp12x0_reset; 138 139 /* 140 * Define the default console speed for the board. 141 */ 142 #ifndef CONMODE 143 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 144 #endif 145 #ifndef CONSPEED 146 #define CONSPEED B38400 147 #endif 148 #ifndef CONADDR 149 #define CONADDR IXPCOM_UART_BASE 150 #endif 151 152 /* Define various stack sizes in pages */ 153 #define IRQ_STACK_SIZE 1 154 #define ABT_STACK_SIZE 1 155 #ifdef IPKDB 156 #define UND_STACK_SIZE 2 157 #else 158 #define UND_STACK_SIZE 1 159 #endif 160 161 BootConfig bootconfig; /* Boot config storage */ 162 char *boot_args = NULL; 163 char *boot_file = NULL; 164 165 vm_offset_t physical_start; 166 vm_offset_t physical_freestart; 167 vm_offset_t physical_freeend; 168 vm_offset_t physical_end; 169 u_int free_pages; 170 vm_offset_t pagetables_start; 171 int physmem = 0; 172 173 /*int debug_flags;*/ 174 #ifndef PMAP_STATIC_L1S 175 int max_processes = 64; /* Default number */ 176 #endif /* !PMAP_STATIC_L1S */ 177 178 /* Physical and virtual addresses for some global pages */ 179 pv_addr_t systempage; 180 pv_addr_t irqstack; 181 pv_addr_t undstack; 182 pv_addr_t abtstack; 183 pv_addr_t kernelstack; 184 185 vm_offset_t msgbufphys; 186 187 extern u_int data_abort_handler_address; 188 extern u_int prefetch_abort_handler_address; 189 extern u_int undefined_handler_address; 190 extern int end; 191 192 #ifdef PMAP_DEBUG 193 extern int pmap_debug_level; 194 #endif /* PMAP_DEBUG */ 195 196 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 197 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 198 #define KERNEL_PT_KERNEL_NUM 2 199 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 200 /* Page table for mapping IO */ 201 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 202 /* Page tables for mapping kernel VM */ 203 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 204 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 205 206 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 207 208 struct user *proc0paddr; 209 210 #ifdef CPU_IXP12X0 211 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 212 extern unsigned int ixp12x0_cache_clean_addr; 213 extern unsigned int ixp12x0_cache_clean_size; 214 static vaddr_t ixp12x0_cc_base; 215 #endif /* CPU_IXP12X0 */ 216 217 /* Prototypes */ 218 219 void consinit __P((void)); 220 u_int cpu_get_control __P((void)); 221 222 void ixdp_ixp12x0_cc_setup(void); 223 224 extern int db_trapper(u_int, u_int, trapframe_t *, int); 225 226 /* 227 * void cpu_reboot(int howto, char *bootstr) 228 * 229 * Reboots the system 230 * 231 * Deal with any syncing, unmounting, dumping and shutdown hooks, 232 * then reset the CPU. 233 */ 234 235 void 236 cpu_reboot(howto, bootstr) 237 int howto; 238 char *bootstr; 239 { 240 /* 241 * If we are still cold then hit the air brakes 242 * and crash to earth fast 243 */ 244 if (cold) { 245 doshutdownhooks(); 246 printf("Halted while still in the ICE age.\n"); 247 printf("The operating system has halted.\n"); 248 printf("Please press any key to reboot.\n\n"); 249 cngetc(); 250 printf("rebooting...\n"); 251 ixp12x0_reset(); 252 } 253 254 /* Disable console buffering */ 255 cnpollc(1); 256 257 /* 258 * If RB_NOSYNC was not specified sync the discs. 259 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 260 * It looks like syslogd is getting woken up only to find that it cannot 261 * page part of the binary in as the filesystem has been unmounted. 262 */ 263 if (!(howto & RB_NOSYNC)) 264 bootsync(); 265 266 /* Say NO to interrupts */ 267 splhigh(); 268 269 /* Do a dump if requested. */ 270 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 271 dumpsys(); 272 273 /* Run any shutdown hooks */ 274 doshutdownhooks(); 275 276 /* Make sure IRQ's are disabled */ 277 IRQdisable; 278 279 if (howto & RB_HALT) { 280 printf("The operating system has halted.\n"); 281 printf("Please press any key to reboot.\n\n"); 282 cngetc(); 283 } 284 285 printf("rebooting...\n"); 286 287 /* all interrupts are disabled */ 288 disable_interrupts(I32_bit); 289 290 ixp12x0_reset(); 291 292 /* ...and if that didn't work, just croak. */ 293 printf("RESET FAILED!\n"); 294 for (;;); 295 } 296 297 /* 298 * Initial entry point on startup. This gets called before main() is 299 * entered. 300 * It should be responsible for setting up everything that must be 301 * in place when main is called. 302 * This includes 303 * Taking a copy of the boot configuration structure. 304 * Initialising the physical console so characters can be printed. 305 * Setting up page tables for the kernel 306 * Relocating the kernel to the bottom of physical memory 307 */ 308 u_int 309 initarm(void *arg) 310 { 311 int loop; 312 int loop1; 313 u_int kerneldatasize, symbolsize; 314 vaddr_t l1pagetable; 315 vaddr_t freemempos; 316 pv_addr_t kernel_l1pt; 317 #if NKSYMS || defined(DDB) || defined(LKM) 318 Elf_Shdr *sh; 319 #endif 320 321 /* 322 * Since we map v0xf0000000 == p0x90000000, it's possible for 323 * us to initialize the console now. 324 */ 325 consinit(); 326 327 #ifdef VERBOSE_INIT_ARM 328 /* Talk to the user */ 329 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 330 #endif 331 332 /* 333 * Heads up ... Setup the CPU / MMU / TLB functions 334 */ 335 if (set_cpufuncs()) 336 panic("cpu not recognized!"); 337 338 /* XXX overwrite bootconfig to hardcoded values */ 339 bootconfig.dram[0].address = 0xc0000000; 340 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 341 bootconfig.dramblocks = 1; 342 343 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 344 345 symbolsize = 0; 346 347 #ifdef PMAP_DEBUG 348 pmap_debug(-1); 349 #endif 350 351 #if NKSYMS || defined(DDB) || defined(LKM) 352 if (! memcmp(&end, "\177ELF", 4)) { 353 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 354 loop = ((Elf_Ehdr *)&end)->e_shnum; 355 for(; loop; loop--, sh++) 356 if (sh->sh_offset > 0 && 357 (sh->sh_offset + sh->sh_size) > symbolsize) 358 symbolsize = sh->sh_offset + sh->sh_size; 359 } 360 #endif 361 #ifdef VERBOSE_INIT_ARM 362 printf("kernsize=0x%x\n", kerneldatasize); 363 #endif 364 kerneldatasize += symbolsize; 365 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 366 367 /* 368 * Set up the variables that define the availablilty of physcial 369 * memory 370 */ 371 physical_start = bootconfig.dram[0].address; 372 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 373 374 physical_freestart = physical_start 375 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 376 physical_freeend = physical_end; 377 378 physmem = (physical_end - physical_start) / PAGE_SIZE; 379 380 freemempos = 0xc0000000; 381 382 #ifdef VERBOSE_INIT_ARM 383 printf("Allocating page tables\n"); 384 #endif 385 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 386 387 #ifdef VERBOSE_INIT_ARM 388 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 389 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 390 physical_freestart, free_pages, free_pages); 391 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 392 physical_start, physical_end); 393 #endif 394 395 /* Define a macro to simplify memory allocation */ 396 #define valloc_pages(var, np) \ 397 alloc_pages((var).pv_pa, (np)); \ 398 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 399 #define alloc_pages(var, np) \ 400 (var) = freemempos; \ 401 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 402 freemempos += (np) * PAGE_SIZE; 403 404 loop1 = 0; 405 kernel_l1pt.pv_pa = 0; 406 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 407 /* Are we 16KB aligned for an L1 ? */ 408 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 409 && kernel_l1pt.pv_pa == 0) { 410 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 411 } else { 412 valloc_pages(kernel_pt_table[loop1], 413 L2_TABLE_SIZE / PAGE_SIZE); 414 ++loop1; 415 } 416 } 417 418 #ifdef DIAGNOSTIC 419 /* This should never be able to happen but better confirm that. */ 420 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 421 panic("initarm: Failed to align the kernel page directory"); 422 #endif 423 424 /* 425 * Allocate a page for the system page mapped to V0x00000000 426 * This page will just contain the system vectors and can be 427 * shared by all processes. 428 */ 429 alloc_pages(systempage.pv_pa, 1); 430 431 /* Allocate stacks for all modes */ 432 valloc_pages(irqstack, IRQ_STACK_SIZE); 433 valloc_pages(abtstack, ABT_STACK_SIZE); 434 valloc_pages(undstack, UND_STACK_SIZE); 435 valloc_pages(kernelstack, UPAGES); 436 437 #ifdef VERBOSE_INIT_ARM 438 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 439 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 440 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 441 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 442 #endif 443 444 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 445 446 #ifdef CPU_IXP12X0 447 /* 448 * XXX totally stuffed hack to work round problems introduced 449 * in recent versions of the pmap code. Due to the calls used there 450 * we cannot allocate virtual memory during bootstrap. 451 */ 452 for(;;) { 453 alloc_pages(ixp12x0_cc_base, 1); 454 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 455 break; 456 } 457 { 458 vaddr_t dummy; 459 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 460 } 461 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 462 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 463 #endif /* CPU_IXP12X0 */ 464 465 #ifdef VERBOSE_INIT_ARM 466 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 467 #endif 468 469 /* 470 * Now we start construction of the L1 page table 471 * We start by mapping the L2 page tables into the L1. 472 * This means that we can replace L1 mappings later on if necessary 473 */ 474 l1pagetable = kernel_l1pt.pv_pa; 475 476 /* Map the L2 pages tables in the L1 page table */ 477 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 478 &kernel_pt_table[KERNEL_PT_SYS]); 479 480 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 481 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 482 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 483 484 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 485 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 486 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 487 488 /* update the top of the kernel VM */ 489 pmap_curmaxkvaddr = 490 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 491 492 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 493 &kernel_pt_table[KERNEL_PT_IO]); 494 495 #ifdef VERBOSE_INIT_ARM 496 printf("Mapping kernel\n"); 497 #endif 498 499 #if XXX 500 /* Now we fill in the L2 pagetable for the kernel code/data */ 501 { 502 extern char etext[], _end[]; 503 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 504 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 505 u_int logical; 506 507 textsize = (textsize + PGOFSET) & ~PGOFSET; 508 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 509 510 logical = 0x00200000; /* offset of kernel in RAM */ 511 512 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 513 physical_start + logical, textsize, 514 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 515 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 516 physical_start + logical, totalsize - textsize, 517 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 518 } 519 #else 520 { 521 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 522 KERNEL_TEXT_BASE, kerneldatasize, 523 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 524 } 525 #endif 526 527 #ifdef VERBOSE_INIT_ARM 528 printf("Constructing L2 page tables\n"); 529 #endif 530 531 /* Map the stack pages */ 532 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 533 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 534 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 535 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 536 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 537 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 538 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 539 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 540 541 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 542 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 543 544 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 545 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 546 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 547 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 548 } 549 550 /* Map the vector page. */ 551 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 554 #ifdef VERBOSE_INIT_ARM 555 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 556 systempage.pv_pa, vector_page); 557 #endif 558 559 /* 560 * Map the PCI I/O spaces and IXP12x0 registers 561 */ 562 563 ixp12x0_pmap_io_reg(l1pagetable); 564 565 #ifdef VERBOSE_INIT_ARM 566 printf("done.\n"); 567 #endif 568 569 /* 570 * Map the Dcache Flush page. 571 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 572 */ 573 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 574 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 575 576 /* 577 * Now we have the real page tables in place so we can switch to them. 578 * Once this is done we will be running with the REAL kernel page 579 * tables. 580 */ 581 582 /* Switch tables */ 583 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 584 setttb(kernel_l1pt.pv_pa); 585 cpu_tlb_flushID(); 586 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 587 588 /* 589 * Moved here from cpu_startup() as data_abort_handler() references 590 * this during init 591 */ 592 proc0paddr = (struct user *)kernelstack.pv_va; 593 lwp0.l_addr = proc0paddr; 594 595 /* 596 * We must now clean the cache again.... 597 * Cleaning may be done by reading new data to displace any 598 * dirty data in the cache. This will have happened in setttb() 599 * but since we are boot strapping the addresses used for the read 600 * may have just been remapped and thus the cache could be out 601 * of sync. A re-clean after the switch will cure this. 602 * After booting there are no gross reloations of the kernel thus 603 * this problem will not occur after initarm(). 604 */ 605 cpu_idcache_wbinv_all(); 606 607 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 608 609 /* 610 * Pages were allocated during the secondary bootstrap for the 611 * stacks for different CPU modes. 612 * We must now set the r13 registers in the different CPU modes to 613 * point to these stacks. 614 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 615 * of the stack memory. 616 */ 617 #ifdef VERBOSE_INIT_ARM 618 printf("init subsystems: stacks "); 619 #endif 620 621 set_stackptr(PSR_IRQ32_MODE, 622 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 623 set_stackptr(PSR_ABT32_MODE, 624 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 625 set_stackptr(PSR_UND32_MODE, 626 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 627 #ifdef PMAP_DEBUG 628 if (pmap_debug_level >= 0) 629 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 630 kernelstack.pv_pa); 631 #endif /* PMAP_DEBUG */ 632 633 /* 634 * Well we should set a data abort handler. 635 * Once things get going this will change as we will need a proper 636 * handler. Until then we will use a handler that just panics but 637 * tells us why. 638 * Initialisation of the vetcors will just panic on a data abort. 639 * This just fills in a slighly better one. 640 */ 641 #ifdef VERBOSE_INIT_ARM 642 printf("vectors "); 643 #endif 644 data_abort_handler_address = (u_int)data_abort_handler; 645 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 646 undefined_handler_address = (u_int)undefinedinstruction_bounce; 647 #ifdef VERBOSE_INIT_ARM 648 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 649 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 650 printf("undefined_handler_address = %08x\n", undefined_handler_address); 651 #endif 652 653 /* Initialise the undefined instruction handlers */ 654 #ifdef VERBOSE_INIT_ARM 655 printf("undefined "); 656 #endif 657 undefined_init(); 658 659 /* Load memory into UVM. */ 660 #ifdef VERBOSE_INIT_ARM 661 printf("page "); 662 #endif 663 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 664 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 665 atop(physical_freestart), atop(physical_freeend), 666 VM_FREELIST_DEFAULT); 667 668 /* Boot strap pmap telling it where the kernel page table is */ 669 #ifdef VERBOSE_INIT_ARM 670 printf("pmap "); 671 #endif 672 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 673 KERNEL_VM_BASE + KERNEL_VM_SIZE); 674 675 /* Setup the IRQ system */ 676 #ifdef VERBOSE_INIT_ARM 677 printf("irq "); 678 #endif 679 ixp12x0_intr_init(); 680 681 #ifdef VERBOSE_INIT_ARM 682 printf("done.\n"); 683 #endif 684 685 #ifdef VERBOSE_INIT_ARM 686 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 687 physical_freestart, free_pages, free_pages); 688 printf("freemempos=%08lx\n", freemempos); 689 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 690 #endif 691 692 consinit(); 693 #ifdef VERBOSE_INIT_ARM 694 printf("consinit \n"); 695 #endif 696 697 ixdp_ixp12x0_cc_setup(); 698 699 #ifdef VERBOSE_INIT_ARM 700 printf("bootstrap done.\n"); 701 #endif 702 703 #ifdef IPKDB 704 /* Initialise ipkdb */ 705 ipkdb_init(); 706 if (boothowto & RB_KDB) 707 ipkdb_connect(0); 708 #endif /* NIPKDB */ 709 710 #if NKSYMS || defined(DDB) || defined(LKM) 711 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 712 #endif 713 714 #ifdef DDB 715 { 716 static struct undefined_handler uh; 717 718 uh.uh_handler = db_trapper; 719 install_coproc_handler_static(0, &uh); 720 } 721 722 if (boothowto & RB_KDB) 723 Debugger(); 724 #endif 725 726 /* We return the new stack pointer address */ 727 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 728 } 729 730 void 731 consinit(void) 732 { 733 extern struct bus_space ixpsip_bs_tag; 734 static int consinit_called = 0; 735 736 if (consinit_called != 0) 737 return; 738 739 consinit_called = 1; 740 741 if (ixpcomcnattach(&ixpsip_bs_tag, 742 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 743 CONSPEED, CONMODE)) 744 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 745 } 746 747 /* 748 * For optimal cache cleaning we need two 16K banks of 749 * virtual address space that NOTHING else will access 750 * and then we alternate the cache cleaning between the 751 * two banks. 752 * The cache cleaning code requires requires 2 banks aligned 753 * on total size boundry so the banks can be alternated by 754 * eorring the size bit (assumes the bank size is a power of 2) 755 */ 756 void 757 ixdp_ixp12x0_cc_setup(void) 758 { 759 int loop; 760 paddr_t kaddr; 761 pt_entry_t *pte; 762 763 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 764 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 765 pte = vtopte(ixp12x0_cc_base + loop); 766 *pte = L2_S_PROTO | kaddr | 767 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 768 PTE_SYNC(pte); 769 } 770 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 771 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 772 } 773
Indexes created Thu Oct 02 14:10:14 GMT 2025