ixm1200_machdep.c revision 1.22
1 /* $NetBSD: ixm1200_machdep.c,v 1.22 2003/05/05 04:34:48 igy 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 1.22 2003/05/05 04:34:48 igy 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) 129 130 /* 131 * Address to call from cpu_reset() to reset the machine. 132 * This is machine architecture dependant as it varies depending 133 * on where the ROM appears when you turn the MMU off. 134 */ 135 136 u_int cpu_reset_address = (u_int) ixp12x0_reset; 137 138 /* 139 * Define the default console speed for the board. 140 */ 141 #ifndef CONMODE 142 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 143 #endif 144 #ifndef CONSPEED 145 #define CONSPEED B38400 146 #endif 147 #ifndef CONADDR 148 #define CONADDR IXPCOM_UART_BASE 149 #endif 150 151 /* Define various stack sizes in pages */ 152 #define IRQ_STACK_SIZE 1 153 #define ABT_STACK_SIZE 1 154 #ifdef IPKDB 155 #define UND_STACK_SIZE 2 156 #else 157 #define UND_STACK_SIZE 1 158 #endif 159 160 BootConfig bootconfig; /* Boot config storage */ 161 char *boot_args = NULL; 162 char *boot_file = NULL; 163 164 vm_offset_t physical_start; 165 vm_offset_t physical_freestart; 166 vm_offset_t physical_freeend; 167 vm_offset_t physical_end; 168 u_int free_pages; 169 vm_offset_t pagetables_start; 170 int physmem = 0; 171 172 /*int debug_flags;*/ 173 #ifndef PMAP_STATIC_L1S 174 int max_processes = 64; /* Default number */ 175 #endif /* !PMAP_STATIC_L1S */ 176 177 /* Physical and virtual addresses for some global pages */ 178 pv_addr_t systempage; 179 pv_addr_t irqstack; 180 pv_addr_t undstack; 181 pv_addr_t abtstack; 182 pv_addr_t kernelstack; 183 184 vm_offset_t msgbufphys; 185 186 extern u_int data_abort_handler_address; 187 extern u_int prefetch_abort_handler_address; 188 extern u_int undefined_handler_address; 189 extern int end; 190 191 #ifdef PMAP_DEBUG 192 extern int pmap_debug_level; 193 #endif /* PMAP_DEBUG */ 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 2 198 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 199 /* Page table for mapping IO */ 200 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 201 /* Page tables for mapping kernel VM */ 202 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 203 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 204 205 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 206 207 struct user *proc0paddr; 208 209 #ifdef CPU_IXP12X0 210 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 211 extern unsigned int ixp12x0_cache_clean_addr; 212 extern unsigned int ixp12x0_cache_clean_size; 213 static vaddr_t ixp12x0_cc_base; 214 #endif /* CPU_IXP12X0 */ 215 216 /* Prototypes */ 217 218 void consinit __P((void)); 219 u_int cpu_get_control __P((void)); 220 221 void ixdp_ixp12x0_cc_setup(void); 222 223 extern int db_trapper(u_int, u_int, trapframe_t *, int); 224 225 /* 226 * void cpu_reboot(int howto, char *bootstr) 227 * 228 * Reboots the system 229 * 230 * Deal with any syncing, unmounting, dumping and shutdown hooks, 231 * then reset the CPU. 232 */ 233 234 void 235 cpu_reboot(howto, bootstr) 236 int howto; 237 char *bootstr; 238 { 239 /* 240 * If we are still cold then hit the air brakes 241 * and crash to earth fast 242 */ 243 if (cold) { 244 doshutdownhooks(); 245 printf("Halted while still in the ICE age.\n"); 246 printf("The operating system has halted.\n"); 247 printf("Please press any key to reboot.\n\n"); 248 cngetc(); 249 printf("rebooting...\n"); 250 ixp12x0_reset(); 251 } 252 253 /* Disable console buffering */ 254 cnpollc(1); 255 256 /* 257 * If RB_NOSYNC was not specified sync the discs. 258 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 259 * It looks like syslogd is getting woken up only to find that it cannot 260 * page part of the binary in as the filesystem has been unmounted. 261 */ 262 if (!(howto & RB_NOSYNC)) 263 bootsync(); 264 265 /* Say NO to interrupts */ 266 splhigh(); 267 268 /* Do a dump if requested. */ 269 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 270 dumpsys(); 271 272 /* Run any shutdown hooks */ 273 doshutdownhooks(); 274 275 /* Make sure IRQ's are disabled */ 276 IRQdisable; 277 278 if (howto & RB_HALT) { 279 printf("The operating system has halted.\n"); 280 printf("Please press any key to reboot.\n\n"); 281 cngetc(); 282 } 283 284 printf("rebooting...\n"); 285 286 /* all interrupts are disabled */ 287 disable_interrupts(I32_bit); 288 289 ixp12x0_reset(); 290 291 /* ...and if that didn't work, just croak. */ 292 printf("RESET FAILED!\n"); 293 for (;;); 294 } 295 296 /* 297 * Initial entry point on startup. This gets called before main() is 298 * entered. 299 * It should be responsible for setting up everything that must be 300 * in place when main is called. 301 * This includes 302 * Taking a copy of the boot configuration structure. 303 * Initialising the physical console so characters can be printed. 304 * Setting up page tables for the kernel 305 * Relocating the kernel to the bottom of physical memory 306 */ 307 u_int 308 initarm(void *arg) 309 { 310 int loop; 311 int loop1; 312 u_int kerneldatasize, symbolsize; 313 vaddr_t l1pagetable; 314 vaddr_t freemempos; 315 pv_addr_t kernel_l1pt; 316 #if NKSYMS || defined(DDB) || defined(LKM) 317 Elf_Shdr *sh; 318 #endif 319 320 /* 321 * Since we map v0xf0000000 == p0x90000000, it's possible for 322 * us to initialize the console now. 323 */ 324 consinit(); 325 326 /* Talk to the user */ 327 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 328 329 /* 330 * Heads up ... Setup the CPU / MMU / TLB functions 331 */ 332 if (set_cpufuncs()) 333 panic("cpu not recognized!"); 334 335 /* XXX overwrite bootconfig to hardcoded values */ 336 bootconfig.dram[0].address = 0xc0000000; 337 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 338 bootconfig.dramblocks = 1; 339 340 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 341 342 symbolsize = 0; 343 344 #ifdef PMAP_DEBUG 345 pmap_debug(-1); 346 #endif 347 348 #if NKSYMS || defined(DDB) || defined(LKM) 349 if (! memcmp(&end, "\177ELF", 4)) { 350 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 351 loop = ((Elf_Ehdr *)&end)->e_shnum; 352 for(; loop; loop--, sh++) 353 if (sh->sh_offset > 0 && 354 (sh->sh_offset + sh->sh_size) > symbolsize) 355 symbolsize = sh->sh_offset + sh->sh_size; 356 } 357 #endif 358 printf("kernsize=0x%x\n", kerneldatasize); 359 kerneldatasize += symbolsize; 360 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 361 362 /* 363 * Set up the variables that define the availablilty of physcial 364 * memory 365 */ 366 physical_start = bootconfig.dram[0].address; 367 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 368 369 physical_freestart = physical_start 370 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 371 physical_freeend = physical_end; 372 373 physmem = (physical_end - physical_start) / PAGE_SIZE; 374 375 freemempos = 0xc0000000; 376 377 #ifdef VERBOSE_INIT_ARM 378 printf("Allocating page tables\n"); 379 #endif 380 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 381 382 #ifdef VERBOSE_INIT_ARM 383 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 384 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 385 physical_freestart, free_pages, free_pages); 386 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 387 physical_start, physical_end); 388 #endif 389 390 /* Define a macro to simplify memory allocation */ 391 #define valloc_pages(var, np) \ 392 alloc_pages((var).pv_pa, (np)); \ 393 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 394 #define alloc_pages(var, np) \ 395 (var) = freemempos; \ 396 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 397 freemempos += (np) * PAGE_SIZE; 398 399 loop1 = 0; 400 kernel_l1pt.pv_pa = 0; 401 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 402 /* Are we 16KB aligned for an L1 ? */ 403 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 404 && kernel_l1pt.pv_pa == 0) { 405 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 406 } else { 407 valloc_pages(kernel_pt_table[loop1], 408 L2_TABLE_SIZE / PAGE_SIZE); 409 ++loop1; 410 } 411 } 412 413 #ifdef DIAGNOSTIC 414 /* This should never be able to happen but better confirm that. */ 415 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 416 panic("initarm: Failed to align the kernel page directory"); 417 #endif 418 419 /* 420 * Allocate a page for the system page mapped to V0x00000000 421 * This page will just contain the system vectors and can be 422 * shared by all processes. 423 */ 424 alloc_pages(systempage.pv_pa, 1); 425 426 /* Allocate stacks for all modes */ 427 valloc_pages(irqstack, IRQ_STACK_SIZE); 428 valloc_pages(abtstack, ABT_STACK_SIZE); 429 valloc_pages(undstack, UND_STACK_SIZE); 430 valloc_pages(kernelstack, UPAGES); 431 432 #ifdef VERBOSE_INIT_ARM 433 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 434 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 435 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 436 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 437 #endif 438 439 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 440 441 #ifdef CPU_IXP12X0 442 /* 443 * XXX totally stuffed hack to work round problems introduced 444 * in recent versions of the pmap code. Due to the calls used there 445 * we cannot allocate virtual memory during bootstrap. 446 */ 447 for(;;) { 448 alloc_pages(ixp12x0_cc_base, 1); 449 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 450 break; 451 } 452 { 453 vaddr_t dummy; 454 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 455 } 456 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 457 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 458 #endif /* CPU_IXP12X0 */ 459 460 #ifdef VERBOSE_INIT_ARM 461 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 462 #endif 463 464 /* 465 * Now we start construction of the L1 page table 466 * We start by mapping the L2 page tables into the L1. 467 * This means that we can replace L1 mappings later on if necessary 468 */ 469 l1pagetable = kernel_l1pt.pv_pa; 470 471 /* Map the L2 pages tables in the L1 page table */ 472 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 473 &kernel_pt_table[KERNEL_PT_SYS]); 474 475 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 476 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 477 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 478 479 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 480 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 481 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 482 483 /* update the top of the kernel VM */ 484 pmap_curmaxkvaddr = 485 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 486 487 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 488 &kernel_pt_table[KERNEL_PT_IO]); 489 490 #ifdef VERBOSE_INIT_ARM 491 printf("Mapping kernel\n"); 492 #endif 493 494 #if XXX 495 /* Now we fill in the L2 pagetable for the kernel code/data */ 496 { 497 extern char etext[], _end[]; 498 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 499 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 500 u_int logical; 501 502 textsize = (textsize + PGOFSET) & ~PGOFSET; 503 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 504 505 logical = 0x00200000; /* offset of kernel in RAM */ 506 507 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 508 physical_start + logical, textsize, 509 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 510 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 511 physical_start + logical, totalsize - textsize, 512 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 513 } 514 #else 515 { 516 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 517 KERNEL_TEXT_BASE, kerneldatasize, 518 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 519 } 520 #endif 521 522 #ifdef VERBOSE_INIT_ARM 523 printf("Constructing L2 page tables\n"); 524 #endif 525 526 /* Map the stack pages */ 527 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 528 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 529 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 530 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 531 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 532 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 533 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 534 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 535 536 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 537 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 538 539 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 540 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 541 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 542 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 543 } 544 545 /* Map the vector page. */ 546 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 547 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 548 549 #ifdef VERBOSE_INIT_ARM 550 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 551 systempage.pv_pa, vector_page); 552 #endif 553 554 /* 555 * Map the PCI I/O spaces and IXP12x0 registers 556 */ 557 558 ixp12x0_pmap_io_reg(l1pagetable); 559 560 printf("done.\n"); 561 562 /* 563 * Map the Dcache Flush page. 564 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 565 */ 566 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 567 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 568 569 /* 570 * Now we have the real page tables in place so we can switch to them. 571 * Once this is done we will be running with the REAL kernel page 572 * tables. 573 */ 574 575 /* Switch tables */ 576 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 577 setttb(kernel_l1pt.pv_pa); 578 cpu_tlb_flushID(); 579 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 580 581 /* 582 * Moved here from cpu_startup() as data_abort_handler() references 583 * this during init 584 */ 585 proc0paddr = (struct user *)kernelstack.pv_va; 586 lwp0.l_addr = proc0paddr; 587 588 /* 589 * We must now clean the cache again.... 590 * Cleaning may be done by reading new data to displace any 591 * dirty data in the cache. This will have happened in setttb() 592 * but since we are boot strapping the addresses used for the read 593 * may have just been remapped and thus the cache could be out 594 * of sync. A re-clean after the switch will cure this. 595 * After booting there are no gross reloations of the kernel thus 596 * this problem will not occur after initarm(). 597 */ 598 cpu_idcache_wbinv_all(); 599 600 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 601 602 /* 603 * Pages were allocated during the secondary bootstrap for the 604 * stacks for different CPU modes. 605 * We must now set the r13 registers in the different CPU modes to 606 * point to these stacks. 607 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 608 * of the stack memory. 609 */ 610 printf("init subsystems: stacks "); 611 612 set_stackptr(PSR_IRQ32_MODE, 613 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 614 set_stackptr(PSR_ABT32_MODE, 615 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 616 set_stackptr(PSR_UND32_MODE, 617 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 618 #ifdef PMAP_DEBUG 619 if (pmap_debug_level >= 0) 620 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 621 kernelstack.pv_pa); 622 #endif /* PMAP_DEBUG */ 623 624 /* 625 * Well we should set a data abort handler. 626 * Once things get going this will change as we will need a proper 627 * handler. Until then we will use a handler that just panics but 628 * tells us why. 629 * Initialisation of the vetcors will just panic on a data abort. 630 * This just fills in a slighly better one. 631 */ 632 printf("vectors "); 633 data_abort_handler_address = (u_int)data_abort_handler; 634 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 635 undefined_handler_address = (u_int)undefinedinstruction_bounce; 636 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 637 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 638 printf("undefined_handler_address = %08x\n", undefined_handler_address); 639 640 /* Initialise the undefined instruction handlers */ 641 printf("undefined "); 642 undefined_init(); 643 644 /* Load memory into UVM. */ 645 printf("page "); 646 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 647 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 648 atop(physical_freestart), atop(physical_freeend), 649 VM_FREELIST_DEFAULT); 650 651 /* Boot strap pmap telling it where the kernel page table is */ 652 printf("pmap "); 653 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 654 KERNEL_VM_BASE + KERNEL_VM_SIZE); 655 656 /* Setup the IRQ system */ 657 printf("irq "); 658 ixp12x0_intr_init(); 659 printf("done.\n"); 660 661 #ifdef VERBOSE_INIT_ARM 662 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 663 physical_freestart, free_pages, free_pages); 664 printf("freemempos=%08lx\n", freemempos); 665 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 666 #endif 667 668 consinit(); 669 printf("consinit \n"); 670 671 ixdp_ixp12x0_cc_setup(); 672 673 printf("bootstrap done.\n"); 674 675 #ifdef IPKDB 676 /* Initialise ipkdb */ 677 ipkdb_init(); 678 if (boothowto & RB_KDB) 679 ipkdb_connect(0); 680 #endif /* NIPKDB */ 681 682 #if NKSYMS || defined(DDB) || defined(LKM) 683 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 684 #endif 685 686 #ifdef DDB 687 { 688 static struct undefined_handler uh; 689 690 uh.uh_handler = db_trapper; 691 install_coproc_handler_static(0, &uh); 692 } 693 694 if (boothowto & RB_KDB) 695 Debugger(); 696 #endif 697 698 /* We return the new stack pointer address */ 699 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 700 } 701 702 void 703 consinit(void) 704 { 705 extern struct bus_space ixpsip_bs_tag; 706 static int consinit_called = 0; 707 708 if (consinit_called != 0) 709 return; 710 711 consinit_called = 1; 712 713 if (ixpcomcnattach(&ixpsip_bs_tag, 714 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 715 CONSPEED, CONMODE)) 716 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 717 } 718 719 /* 720 * For optimal cache cleaning we need two 16K banks of 721 * virtual address space that NOTHING else will access 722 * and then we alternate the cache cleaning between the 723 * two banks. 724 * The cache cleaning code requires requires 2 banks aligned 725 * on total size boundry so the banks can be alternated by 726 * eorring the size bit (assumes the bank size is a power of 2) 727 */ 728 void 729 ixdp_ixp12x0_cc_setup(void) 730 { 731 int loop; 732 paddr_t kaddr; 733 pt_entry_t *pte; 734 735 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 736 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 737 pte = vtopte(ixp12x0_cc_base + loop); 738 *pte = L2_S_PROTO | kaddr | 739 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 740 PTE_SYNC(pte); 741 } 742 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 743 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 744 } 745
Indexes created Thu Oct 02 14:10:14 GMT 2025