ixm1200_machdep.c revision 1.34
1 /* $NetBSD: ixm1200_machdep.c,v 1.34 2008/04/27 18:58:46 matt 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 1.34 2008/04/27 18:58:46 matt 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 /* XXX for consinit related hacks */ 121 #include <sys/conf.h> 122 123 void ixp12x0_reset(void) __attribute__((noreturn)); 124 125 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 126 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 127 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 128 129 /* 130 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 131 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 132 */ 133 #define KERNEL_VM_SIZE 0x0C000000 134 135 /* 136 * Address to call from cpu_reset() to reset the machine. 137 * This is machine architecture dependant as it varies depending 138 * on where the ROM appears when you turn the MMU off. 139 */ 140 141 u_int cpu_reset_address = (u_int) ixp12x0_reset; 142 143 /* 144 * Define the default console speed for the board. 145 */ 146 #ifndef CONMODE 147 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 148 #endif 149 #ifndef CONSPEED 150 #define CONSPEED B38400 151 #endif 152 #ifndef CONADDR 153 #define CONADDR IXPCOM_UART_BASE 154 #endif 155 156 /* Define various stack sizes in pages */ 157 #define IRQ_STACK_SIZE 1 158 #define ABT_STACK_SIZE 1 159 #define UND_STACK_SIZE 1 160 161 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 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 /* 224 * void cpu_reboot(int howto, char *bootstr) 225 * 226 * Reboots the system 227 * 228 * Deal with any syncing, unmounting, dumping and shutdown hooks, 229 * then reset the CPU. 230 */ 231 232 void 233 cpu_reboot(howto, bootstr) 234 int howto; 235 char *bootstr; 236 { 237 /* 238 * If we are still cold then hit the air brakes 239 * and crash to earth fast 240 */ 241 if (cold) { 242 doshutdownhooks(); 243 printf("Halted while still in the ICE age.\n"); 244 printf("The operating system has halted.\n"); 245 printf("Please press any key to reboot.\n\n"); 246 cngetc(); 247 printf("rebooting...\n"); 248 ixp12x0_reset(); 249 } 250 251 /* Disable console buffering */ 252 cnpollc(1); 253 254 /* 255 * If RB_NOSYNC was not specified sync the discs. 256 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 257 * It looks like syslogd is getting woken up only to find that it cannot 258 * page part of the binary in as the filesystem has been unmounted. 259 */ 260 if (!(howto & RB_NOSYNC)) 261 bootsync(); 262 263 /* Say NO to interrupts */ 264 splhigh(); 265 266 /* Do a dump if requested. */ 267 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 268 dumpsys(); 269 270 /* Run any shutdown hooks */ 271 doshutdownhooks(); 272 273 /* Make sure IRQ's are disabled */ 274 IRQdisable; 275 276 if (howto & RB_HALT) { 277 printf("The operating system has halted.\n"); 278 printf("Please press any key to reboot.\n\n"); 279 cngetc(); 280 } 281 282 printf("rebooting...\n"); 283 284 /* all interrupts are disabled */ 285 disable_interrupts(I32_bit); 286 287 ixp12x0_reset(); 288 289 /* ...and if that didn't work, just croak. */ 290 printf("RESET FAILED!\n"); 291 for (;;); 292 } 293 294 /* Static device mappings. */ 295 static const struct pmap_devmap ixm1200_devmap[] = { 296 /* StrongARM System and Peripheral Registers */ 297 { 298 IXP12X0_SYS_VBASE, 299 IXP12X0_SYS_HWBASE, 300 IXP12X0_SYS_SIZE, 301 VM_PROT_READ|VM_PROT_WRITE, 302 PTE_NOCACHE, 303 }, 304 /* PCI Registers Accessible Through StrongARM Core */ 305 { 306 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 307 IXP12X0_PCI_SIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 /* PCI Registers Accessible Through I/O Cycle Access */ 312 { 313 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 314 IXP12X0_PCI_IO_SIZE, 315 VM_PROT_READ|VM_PROT_WRITE, 316 PTE_NOCACHE, 317 }, 318 /* PCI Type0 Configuration Space */ 319 { 320 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 321 IXP12X0_PCI_TYPE0_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 /* PCI Type1 Configuration Space */ 326 { 327 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 328 IXP12X0_PCI_TYPE1_SIZE, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE, 331 }, 332 { 333 0, 334 0, 335 0, 336 0, 337 0 338 }, 339 }; 340 341 /* 342 * Initial entry point on startup. This gets called before main() is 343 * entered. 344 * It should be responsible for setting up everything that must be 345 * in place when main is called. 346 * This includes 347 * Taking a copy of the boot configuration structure. 348 * Initialising the physical console so characters can be printed. 349 * Setting up page tables for the kernel 350 * Relocating the kernel to the bottom of physical memory 351 */ 352 u_int 353 initarm(void *arg) 354 { 355 int loop; 356 int loop1; 357 u_int kerneldatasize, symbolsize; 358 vaddr_t l1pagetable; 359 vaddr_t freemempos; 360 #if NKSYMS || defined(DDB) || defined(LKM) 361 Elf_Shdr *sh; 362 #endif 363 364 /* 365 * Since we map v0xf0000000 == p0x90000000, it's possible for 366 * us to initialize the console now. 367 */ 368 consinit(); 369 370 #ifdef VERBOSE_INIT_ARM 371 /* Talk to the user */ 372 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 373 #endif 374 375 /* 376 * Heads up ... Setup the CPU / MMU / TLB functions 377 */ 378 if (set_cpufuncs()) 379 panic("CPU not recognized!"); 380 381 /* XXX overwrite bootconfig to hardcoded values */ 382 bootconfig.dram[0].address = 0xc0000000; 383 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 384 bootconfig.dramblocks = 1; 385 386 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 387 388 symbolsize = 0; 389 390 #ifdef PMAP_DEBUG 391 pmap_debug(-1); 392 #endif 393 394 #if NKSYMS || defined(DDB) || defined(LKM) 395 if (! memcmp(&end, "\177ELF", 4)) { 396 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 397 loop = ((Elf_Ehdr *)&end)->e_shnum; 398 for(; loop; loop--, sh++) 399 if (sh->sh_offset > 0 && 400 (sh->sh_offset + sh->sh_size) > symbolsize) 401 symbolsize = sh->sh_offset + sh->sh_size; 402 } 403 #endif 404 #ifdef VERBOSE_INIT_ARM 405 printf("kernsize=0x%x\n", kerneldatasize); 406 #endif 407 kerneldatasize += symbolsize; 408 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 409 410 /* 411 * Set up the variables that define the availablilty of physcial 412 * memory 413 */ 414 physical_start = bootconfig.dram[0].address; 415 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 416 417 physical_freestart = physical_start 418 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 419 physical_freeend = physical_end; 420 421 physmem = (physical_end - physical_start) / PAGE_SIZE; 422 423 freemempos = 0xc0000000; 424 425 #ifdef VERBOSE_INIT_ARM 426 printf("Allocating page tables\n"); 427 #endif 428 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 429 430 #ifdef VERBOSE_INIT_ARM 431 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 432 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 433 physical_freestart, free_pages, free_pages); 434 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 435 physical_start, physical_end); 436 #endif 437 438 /* Define a macro to simplify memory allocation */ 439 #define valloc_pages(var, np) \ 440 alloc_pages((var).pv_pa, (np)); \ 441 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 442 #define alloc_pages(var, np) \ 443 (var) = freemempos; \ 444 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 445 freemempos += (np) * PAGE_SIZE; 446 447 loop1 = 0; 448 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 449 /* Are we 16KB aligned for an L1 ? */ 450 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 451 && kernel_l1pt.pv_pa == 0) { 452 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 453 } else { 454 valloc_pages(kernel_pt_table[loop1], 455 L2_TABLE_SIZE / PAGE_SIZE); 456 ++loop1; 457 } 458 } 459 460 #ifdef DIAGNOSTIC 461 /* This should never be able to happen but better confirm that. */ 462 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 463 panic("initarm: Failed to align the kernel page directory"); 464 #endif 465 466 /* 467 * Allocate a page for the system page mapped to V0x00000000 468 * This page will just contain the system vectors and can be 469 * shared by all processes. 470 */ 471 alloc_pages(systempage.pv_pa, 1); 472 473 /* Allocate stacks for all modes */ 474 valloc_pages(irqstack, IRQ_STACK_SIZE); 475 valloc_pages(abtstack, ABT_STACK_SIZE); 476 valloc_pages(undstack, UND_STACK_SIZE); 477 valloc_pages(kernelstack, UPAGES); 478 479 #ifdef VERBOSE_INIT_ARM 480 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 481 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 482 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 483 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 484 #endif 485 486 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 487 488 #ifdef CPU_IXP12X0 489 /* 490 * XXX totally stuffed hack to work round problems introduced 491 * in recent versions of the pmap code. Due to the calls used there 492 * we cannot allocate virtual memory during bootstrap. 493 */ 494 for(;;) { 495 alloc_pages(ixp12x0_cc_base, 1); 496 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 497 break; 498 } 499 { 500 vaddr_t dummy; 501 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 502 } 503 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 504 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 505 #endif /* CPU_IXP12X0 */ 506 507 #ifdef VERBOSE_INIT_ARM 508 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 509 #endif 510 511 /* 512 * Now we start construction of the L1 page table 513 * We start by mapping the L2 page tables into the L1. 514 * This means that we can replace L1 mappings later on if necessary 515 */ 516 l1pagetable = kernel_l1pt.pv_pa; 517 518 /* Map the L2 pages tables in the L1 page table */ 519 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 520 &kernel_pt_table[KERNEL_PT_SYS]); 521 522 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 523 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 524 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 525 526 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 527 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 528 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 529 530 /* update the top of the kernel VM */ 531 pmap_curmaxkvaddr = 532 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 533 534 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 535 &kernel_pt_table[KERNEL_PT_IO]); 536 537 #ifdef VERBOSE_INIT_ARM 538 printf("Mapping kernel\n"); 539 #endif 540 541 #if XXX 542 /* Now we fill in the L2 pagetable for the kernel code/data */ 543 { 544 extern char etext[], _end[]; 545 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 546 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 547 u_int logical; 548 549 textsize = (textsize + PGOFSET) & ~PGOFSET; 550 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 551 552 logical = 0x00200000; /* offset of kernel in RAM */ 553 554 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 555 physical_start + logical, textsize, 556 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 557 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 558 physical_start + logical, totalsize - textsize, 559 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 560 } 561 #else 562 { 563 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 564 KERNEL_TEXT_BASE, kerneldatasize, 565 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 } 567 #endif 568 569 #ifdef VERBOSE_INIT_ARM 570 printf("Constructing L2 page tables\n"); 571 #endif 572 573 /* Map the stack pages */ 574 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 575 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 576 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 577 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 578 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 579 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 580 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 581 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 582 583 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 584 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 585 586 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 587 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 588 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 589 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 590 } 591 592 /* Map the vector page. */ 593 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 594 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 595 596 #ifdef VERBOSE_INIT_ARM 597 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 598 systempage.pv_pa, vector_page); 599 #endif 600 601 /* Map the statically mapped devices. */ 602 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 603 604 #ifdef VERBOSE_INIT_ARM 605 printf("done.\n"); 606 #endif 607 608 /* 609 * Map the Dcache Flush page. 610 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 611 */ 612 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 613 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 614 615 /* 616 * Now we have the real page tables in place so we can switch to them. 617 * Once this is done we will be running with the REAL kernel page 618 * tables. 619 */ 620 621 /* Switch tables */ 622 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 623 setttb(kernel_l1pt.pv_pa); 624 cpu_tlb_flushID(); 625 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 626 627 /* 628 * Moved here from cpu_startup() as data_abort_handler() references 629 * this during init 630 */ 631 proc0paddr = (struct user *)kernelstack.pv_va; 632 lwp0.l_addr = proc0paddr; 633 634 /* 635 * We must now clean the cache again.... 636 * Cleaning may be done by reading new data to displace any 637 * dirty data in the cache. This will have happened in setttb() 638 * but since we are boot strapping the addresses used for the read 639 * may have just been remapped and thus the cache could be out 640 * of sync. A re-clean after the switch will cure this. 641 * After booting there are no gross reloations of the kernel thus 642 * this problem will not occur after initarm(). 643 */ 644 cpu_idcache_wbinv_all(); 645 646 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 647 648 /* 649 * Pages were allocated during the secondary bootstrap for the 650 * stacks for different CPU modes. 651 * We must now set the r13 registers in the different CPU modes to 652 * point to these stacks. 653 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 654 * of the stack memory. 655 */ 656 #ifdef VERBOSE_INIT_ARM 657 printf("init subsystems: stacks "); 658 #endif 659 660 set_stackptr(PSR_IRQ32_MODE, 661 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 662 set_stackptr(PSR_ABT32_MODE, 663 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 664 set_stackptr(PSR_UND32_MODE, 665 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 666 #ifdef PMAP_DEBUG 667 if (pmap_debug_level >= 0) 668 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 669 kernelstack.pv_pa); 670 #endif /* PMAP_DEBUG */ 671 672 /* 673 * Well we should set a data abort handler. 674 * Once things get going this will change as we will need a proper 675 * handler. Until then we will use a handler that just panics but 676 * tells us why. 677 * Initialisation of the vetcors will just panic on a data abort. 678 * This just fills in a slightly better one. 679 */ 680 #ifdef VERBOSE_INIT_ARM 681 printf("vectors "); 682 #endif 683 data_abort_handler_address = (u_int)data_abort_handler; 684 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 685 undefined_handler_address = (u_int)undefinedinstruction_bounce; 686 #ifdef VERBOSE_INIT_ARM 687 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 688 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 689 printf("undefined_handler_address = %08x\n", undefined_handler_address); 690 #endif 691 692 /* Initialise the undefined instruction handlers */ 693 #ifdef VERBOSE_INIT_ARM 694 printf("undefined "); 695 #endif 696 undefined_init(); 697 698 /* Load memory into UVM. */ 699 #ifdef VERBOSE_INIT_ARM 700 printf("page "); 701 #endif 702 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 703 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 704 atop(physical_freestart), atop(physical_freeend), 705 VM_FREELIST_DEFAULT); 706 707 /* Boot strap pmap telling it where the kernel page table is */ 708 #ifdef VERBOSE_INIT_ARM 709 printf("pmap "); 710 #endif 711 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 712 713 /* Setup the IRQ system */ 714 #ifdef VERBOSE_INIT_ARM 715 printf("irq "); 716 #endif 717 ixp12x0_intr_init(); 718 719 #ifdef VERBOSE_INIT_ARM 720 printf("done.\n"); 721 #endif 722 723 #ifdef VERBOSE_INIT_ARM 724 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 725 physical_freestart, free_pages, free_pages); 726 printf("freemempos=%08lx\n", freemempos); 727 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 728 #endif 729 730 consinit(); 731 #ifdef VERBOSE_INIT_ARM 732 printf("consinit \n"); 733 #endif 734 735 ixdp_ixp12x0_cc_setup(); 736 737 #ifdef VERBOSE_INIT_ARM 738 printf("bootstrap done.\n"); 739 #endif 740 741 #if NKSYMS || defined(DDB) || defined(LKM) 742 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 743 #endif 744 745 #ifdef DDB 746 db_machine_init(); 747 if (boothowto & RB_KDB) 748 Debugger(); 749 #endif 750 751 /* We return the new stack pointer address */ 752 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 753 } 754 755 void 756 consinit(void) 757 { 758 static int consinit_called = 0; 759 760 if (consinit_called != 0) 761 return; 762 763 consinit_called = 1; 764 765 pmap_devmap_register(ixm1200_devmap); 766 767 if (ixpcomcnattach(&ixp12x0_bs_tag, 768 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 769 CONSPEED, CONMODE)) 770 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 771 } 772 773 /* 774 * For optimal cache cleaning we need two 16K banks of 775 * virtual address space that NOTHING else will access 776 * and then we alternate the cache cleaning between the 777 * two banks. 778 * The cache cleaning code requires requires 2 banks aligned 779 * on total size boundry so the banks can be alternated by 780 * eorring the size bit (assumes the bank size is a power of 2) 781 */ 782 void 783 ixdp_ixp12x0_cc_setup(void) 784 { 785 int loop; 786 paddr_t kaddr; 787 pt_entry_t *pte; 788 789 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 790 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 791 pte = vtopte(ixp12x0_cc_base + loop); 792 *pte = L2_S_PROTO | kaddr | 793 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 794 PTE_SYNC(pte); 795 } 796 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 797 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 798 } 799
Indexes created Thu Oct 02 14:10:14 GMT 2025