ixm1200_machdep.c revision 1.30
1 /* $NetBSD: ixm1200_machdep.c,v 1.30 2004/12/12 20:42:53 abs 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 1.30 2004/12/12 20:42:53 abs 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 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 133 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 134 */ 135 #define KERNEL_VM_SIZE 0x0C000000 136 137 /* 138 * Address to call from cpu_reset() to reset the machine. 139 * This is machine architecture dependant as it varies depending 140 * on where the ROM appears when you turn the MMU off. 141 */ 142 143 u_int cpu_reset_address = (u_int) ixp12x0_reset; 144 145 /* 146 * Define the default console speed for the board. 147 */ 148 #ifndef CONMODE 149 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */ 150 #endif 151 #ifndef CONSPEED 152 #define CONSPEED B38400 153 #endif 154 #ifndef CONADDR 155 #define CONADDR IXPCOM_UART_BASE 156 #endif 157 158 /* Define various stack sizes in pages */ 159 #define IRQ_STACK_SIZE 1 160 #define ABT_STACK_SIZE 1 161 #ifdef IPKDB 162 #define UND_STACK_SIZE 2 163 #else 164 #define UND_STACK_SIZE 1 165 #endif 166 167 BootConfig bootconfig; /* Boot config storage */ 168 char *boot_args = NULL; 169 char *boot_file = NULL; 170 171 vm_offset_t physical_start; 172 vm_offset_t physical_freestart; 173 vm_offset_t physical_freeend; 174 vm_offset_t physical_end; 175 u_int free_pages; 176 vm_offset_t pagetables_start; 177 int physmem = 0; 178 179 /*int debug_flags;*/ 180 #ifndef PMAP_STATIC_L1S 181 int max_processes = 64; /* Default number */ 182 #endif /* !PMAP_STATIC_L1S */ 183 184 /* Physical and virtual addresses for some global pages */ 185 pv_addr_t systempage; 186 pv_addr_t irqstack; 187 pv_addr_t undstack; 188 pv_addr_t abtstack; 189 pv_addr_t kernelstack; 190 191 vm_offset_t msgbufphys; 192 193 extern u_int data_abort_handler_address; 194 extern u_int prefetch_abort_handler_address; 195 extern u_int undefined_handler_address; 196 extern int end; 197 198 #ifdef PMAP_DEBUG 199 extern int pmap_debug_level; 200 #endif /* PMAP_DEBUG */ 201 202 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 203 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 204 #define KERNEL_PT_KERNEL_NUM 2 205 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 206 /* Page table for mapping IO */ 207 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 208 /* Page tables for mapping kernel VM */ 209 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 210 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 211 212 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 213 214 struct user *proc0paddr; 215 216 #ifdef CPU_IXP12X0 217 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 218 extern unsigned int ixp12x0_cache_clean_addr; 219 extern unsigned int ixp12x0_cache_clean_size; 220 static vaddr_t ixp12x0_cc_base; 221 #endif /* CPU_IXP12X0 */ 222 223 /* Prototypes */ 224 225 void consinit __P((void)); 226 u_int cpu_get_control __P((void)); 227 228 void ixdp_ixp12x0_cc_setup(void); 229 230 /* 231 * void cpu_reboot(int howto, char *bootstr) 232 * 233 * Reboots the system 234 * 235 * Deal with any syncing, unmounting, dumping and shutdown hooks, 236 * then reset the CPU. 237 */ 238 239 void 240 cpu_reboot(howto, bootstr) 241 int howto; 242 char *bootstr; 243 { 244 /* 245 * If we are still cold then hit the air brakes 246 * and crash to earth fast 247 */ 248 if (cold) { 249 doshutdownhooks(); 250 printf("Halted while still in the ICE age.\n"); 251 printf("The operating system has halted.\n"); 252 printf("Please press any key to reboot.\n\n"); 253 cngetc(); 254 printf("rebooting...\n"); 255 ixp12x0_reset(); 256 } 257 258 /* Disable console buffering */ 259 cnpollc(1); 260 261 /* 262 * If RB_NOSYNC was not specified sync the discs. 263 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 264 * It looks like syslogd is getting woken up only to find that it cannot 265 * page part of the binary in as the filesystem has been unmounted. 266 */ 267 if (!(howto & RB_NOSYNC)) 268 bootsync(); 269 270 /* Say NO to interrupts */ 271 splhigh(); 272 273 /* Do a dump if requested. */ 274 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 275 dumpsys(); 276 277 /* Run any shutdown hooks */ 278 doshutdownhooks(); 279 280 /* Make sure IRQ's are disabled */ 281 IRQdisable; 282 283 if (howto & RB_HALT) { 284 printf("The operating system has halted.\n"); 285 printf("Please press any key to reboot.\n\n"); 286 cngetc(); 287 } 288 289 printf("rebooting...\n"); 290 291 /* all interrupts are disabled */ 292 disable_interrupts(I32_bit); 293 294 ixp12x0_reset(); 295 296 /* ...and if that didn't work, just croak. */ 297 printf("RESET FAILED!\n"); 298 for (;;); 299 } 300 301 /* Static device mappings. */ 302 static const struct pmap_devmap ixm1200_devmap[] = { 303 /* StrongARM System and Peripheral Registers */ 304 { 305 IXP12X0_SYS_VBASE, 306 IXP12X0_SYS_HWBASE, 307 IXP12X0_SYS_SIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 /* PCI Registers Accessible Through StrongARM Core */ 312 { 313 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 314 IXP12X0_PCI_SIZE, 315 VM_PROT_READ|VM_PROT_WRITE, 316 PTE_NOCACHE, 317 }, 318 /* PCI Registers Accessible Through I/O Cycle Access */ 319 { 320 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 321 IXP12X0_PCI_IO_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 /* PCI Type0 Configuration Space */ 326 { 327 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 328 IXP12X0_PCI_TYPE0_SIZE, 329 VM_PROT_READ|VM_PROT_WRITE, 330 PTE_NOCACHE, 331 }, 332 /* PCI Type1 Configuration Space */ 333 { 334 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 335 IXP12X0_PCI_TYPE1_SIZE, 336 VM_PROT_READ|VM_PROT_WRITE, 337 PTE_NOCACHE, 338 }, 339 { 340 0, 341 0, 342 0, 343 0, 344 0 345 }, 346 }; 347 348 /* 349 * Initial entry point on startup. This gets called before main() is 350 * entered. 351 * It should be responsible for setting up everything that must be 352 * in place when main is called. 353 * This includes 354 * Taking a copy of the boot configuration structure. 355 * Initialising the physical console so characters can be printed. 356 * Setting up page tables for the kernel 357 * Relocating the kernel to the bottom of physical memory 358 */ 359 u_int 360 initarm(void *arg) 361 { 362 int loop; 363 int loop1; 364 u_int kerneldatasize, symbolsize; 365 vaddr_t l1pagetable; 366 vaddr_t freemempos; 367 pv_addr_t kernel_l1pt; 368 #if NKSYMS || defined(DDB) || defined(LKM) 369 Elf_Shdr *sh; 370 #endif 371 372 /* 373 * Since we map v0xf0000000 == p0x90000000, it's possible for 374 * us to initialize the console now. 375 */ 376 consinit(); 377 378 #ifdef VERBOSE_INIT_ARM 379 /* Talk to the user */ 380 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 381 #endif 382 383 /* 384 * Heads up ... Setup the CPU / MMU / TLB functions 385 */ 386 if (set_cpufuncs()) 387 panic("CPU not recognized!"); 388 389 /* XXX overwrite bootconfig to hardcoded values */ 390 bootconfig.dram[0].address = 0xc0000000; 391 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 392 bootconfig.dramblocks = 1; 393 394 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 395 396 symbolsize = 0; 397 398 #ifdef PMAP_DEBUG 399 pmap_debug(-1); 400 #endif 401 402 #if NKSYMS || defined(DDB) || defined(LKM) 403 if (! memcmp(&end, "\177ELF", 4)) { 404 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 405 loop = ((Elf_Ehdr *)&end)->e_shnum; 406 for(; loop; loop--, sh++) 407 if (sh->sh_offset > 0 && 408 (sh->sh_offset + sh->sh_size) > symbolsize) 409 symbolsize = sh->sh_offset + sh->sh_size; 410 } 411 #endif 412 #ifdef VERBOSE_INIT_ARM 413 printf("kernsize=0x%x\n", kerneldatasize); 414 #endif 415 kerneldatasize += symbolsize; 416 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 417 418 /* 419 * Set up the variables that define the availablilty of physcial 420 * memory 421 */ 422 physical_start = bootconfig.dram[0].address; 423 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 424 425 physical_freestart = physical_start 426 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 427 physical_freeend = physical_end; 428 429 physmem = (physical_end - physical_start) / PAGE_SIZE; 430 431 freemempos = 0xc0000000; 432 433 #ifdef VERBOSE_INIT_ARM 434 printf("Allocating page tables\n"); 435 #endif 436 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 437 438 #ifdef VERBOSE_INIT_ARM 439 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 440 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 441 physical_freestart, free_pages, free_pages); 442 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 443 physical_start, physical_end); 444 #endif 445 446 /* Define a macro to simplify memory allocation */ 447 #define valloc_pages(var, np) \ 448 alloc_pages((var).pv_pa, (np)); \ 449 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 450 #define alloc_pages(var, np) \ 451 (var) = freemempos; \ 452 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 453 freemempos += (np) * PAGE_SIZE; 454 455 loop1 = 0; 456 kernel_l1pt.pv_pa = 0; 457 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 458 /* Are we 16KB aligned for an L1 ? */ 459 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 460 && kernel_l1pt.pv_pa == 0) { 461 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 462 } else { 463 valloc_pages(kernel_pt_table[loop1], 464 L2_TABLE_SIZE / PAGE_SIZE); 465 ++loop1; 466 } 467 } 468 469 #ifdef DIAGNOSTIC 470 /* This should never be able to happen but better confirm that. */ 471 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 472 panic("initarm: Failed to align the kernel page directory"); 473 #endif 474 475 /* 476 * Allocate a page for the system page mapped to V0x00000000 477 * This page will just contain the system vectors and can be 478 * shared by all processes. 479 */ 480 alloc_pages(systempage.pv_pa, 1); 481 482 /* Allocate stacks for all modes */ 483 valloc_pages(irqstack, IRQ_STACK_SIZE); 484 valloc_pages(abtstack, ABT_STACK_SIZE); 485 valloc_pages(undstack, UND_STACK_SIZE); 486 valloc_pages(kernelstack, UPAGES); 487 488 #ifdef VERBOSE_INIT_ARM 489 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 490 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 491 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 492 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 493 #endif 494 495 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 496 497 #ifdef CPU_IXP12X0 498 /* 499 * XXX totally stuffed hack to work round problems introduced 500 * in recent versions of the pmap code. Due to the calls used there 501 * we cannot allocate virtual memory during bootstrap. 502 */ 503 for(;;) { 504 alloc_pages(ixp12x0_cc_base, 1); 505 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 506 break; 507 } 508 { 509 vaddr_t dummy; 510 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 511 } 512 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 513 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 514 #endif /* CPU_IXP12X0 */ 515 516 #ifdef VERBOSE_INIT_ARM 517 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 518 #endif 519 520 /* 521 * Now we start construction of the L1 page table 522 * We start by mapping the L2 page tables into the L1. 523 * This means that we can replace L1 mappings later on if necessary 524 */ 525 l1pagetable = kernel_l1pt.pv_pa; 526 527 /* Map the L2 pages tables in the L1 page table */ 528 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 529 &kernel_pt_table[KERNEL_PT_SYS]); 530 531 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 532 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 533 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 534 535 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 536 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 537 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 538 539 /* update the top of the kernel VM */ 540 pmap_curmaxkvaddr = 541 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 542 543 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 544 &kernel_pt_table[KERNEL_PT_IO]); 545 546 #ifdef VERBOSE_INIT_ARM 547 printf("Mapping kernel\n"); 548 #endif 549 550 #if XXX 551 /* Now we fill in the L2 pagetable for the kernel code/data */ 552 { 553 extern char etext[], _end[]; 554 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 555 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 556 u_int logical; 557 558 textsize = (textsize + PGOFSET) & ~PGOFSET; 559 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 560 561 logical = 0x00200000; /* offset of kernel in RAM */ 562 563 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 564 physical_start + logical, textsize, 565 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 566 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 567 physical_start + logical, totalsize - textsize, 568 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 } 570 #else 571 { 572 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 573 KERNEL_TEXT_BASE, kerneldatasize, 574 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 } 576 #endif 577 578 #ifdef VERBOSE_INIT_ARM 579 printf("Constructing L2 page tables\n"); 580 #endif 581 582 /* Map the stack pages */ 583 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 584 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 586 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 587 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 588 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 589 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 590 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 591 592 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 593 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 594 595 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 596 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 597 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 598 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 599 } 600 601 /* Map the vector page. */ 602 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 603 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 604 605 #ifdef VERBOSE_INIT_ARM 606 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 607 systempage.pv_pa, vector_page); 608 #endif 609 610 /* Map the statically mapped devices. */ 611 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 612 613 #ifdef VERBOSE_INIT_ARM 614 printf("done.\n"); 615 #endif 616 617 /* 618 * Map the Dcache Flush page. 619 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 620 */ 621 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 622 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 623 624 /* 625 * Now we have the real page tables in place so we can switch to them. 626 * Once this is done we will be running with the REAL kernel page 627 * tables. 628 */ 629 630 /* Switch tables */ 631 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 632 setttb(kernel_l1pt.pv_pa); 633 cpu_tlb_flushID(); 634 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 635 636 /* 637 * Moved here from cpu_startup() as data_abort_handler() references 638 * this during init 639 */ 640 proc0paddr = (struct user *)kernelstack.pv_va; 641 lwp0.l_addr = proc0paddr; 642 643 /* 644 * We must now clean the cache again.... 645 * Cleaning may be done by reading new data to displace any 646 * dirty data in the cache. This will have happened in setttb() 647 * but since we are boot strapping the addresses used for the read 648 * may have just been remapped and thus the cache could be out 649 * of sync. A re-clean after the switch will cure this. 650 * After booting there are no gross reloations of the kernel thus 651 * this problem will not occur after initarm(). 652 */ 653 cpu_idcache_wbinv_all(); 654 655 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 656 657 /* 658 * Pages were allocated during the secondary bootstrap for the 659 * stacks for different CPU modes. 660 * We must now set the r13 registers in the different CPU modes to 661 * point to these stacks. 662 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 663 * of the stack memory. 664 */ 665 #ifdef VERBOSE_INIT_ARM 666 printf("init subsystems: stacks "); 667 #endif 668 669 set_stackptr(PSR_IRQ32_MODE, 670 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 671 set_stackptr(PSR_ABT32_MODE, 672 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 673 set_stackptr(PSR_UND32_MODE, 674 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 675 #ifdef PMAP_DEBUG 676 if (pmap_debug_level >= 0) 677 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 678 kernelstack.pv_pa); 679 #endif /* PMAP_DEBUG */ 680 681 /* 682 * Well we should set a data abort handler. 683 * Once things get going this will change as we will need a proper 684 * handler. Until then we will use a handler that just panics but 685 * tells us why. 686 * Initialisation of the vetcors will just panic on a data abort. 687 * This just fills in a slightly better one. 688 */ 689 #ifdef VERBOSE_INIT_ARM 690 printf("vectors "); 691 #endif 692 data_abort_handler_address = (u_int)data_abort_handler; 693 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 694 undefined_handler_address = (u_int)undefinedinstruction_bounce; 695 #ifdef VERBOSE_INIT_ARM 696 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 697 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 698 printf("undefined_handler_address = %08x\n", undefined_handler_address); 699 #endif 700 701 /* Initialise the undefined instruction handlers */ 702 #ifdef VERBOSE_INIT_ARM 703 printf("undefined "); 704 #endif 705 undefined_init(); 706 707 /* Load memory into UVM. */ 708 #ifdef VERBOSE_INIT_ARM 709 printf("page "); 710 #endif 711 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 712 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 713 atop(physical_freestart), atop(physical_freeend), 714 VM_FREELIST_DEFAULT); 715 716 /* Boot strap pmap telling it where the kernel page table is */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("pmap "); 719 #endif 720 pmap_bootstrap((pd_entry_t *)kernel_l1pt.pv_va, KERNEL_VM_BASE, 721 KERNEL_VM_BASE + KERNEL_VM_SIZE); 722 723 /* Setup the IRQ system */ 724 #ifdef VERBOSE_INIT_ARM 725 printf("irq "); 726 #endif 727 ixp12x0_intr_init(); 728 729 #ifdef VERBOSE_INIT_ARM 730 printf("done.\n"); 731 #endif 732 733 #ifdef VERBOSE_INIT_ARM 734 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 735 physical_freestart, free_pages, free_pages); 736 printf("freemempos=%08lx\n", freemempos); 737 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 738 #endif 739 740 consinit(); 741 #ifdef VERBOSE_INIT_ARM 742 printf("consinit \n"); 743 #endif 744 745 ixdp_ixp12x0_cc_setup(); 746 747 #ifdef VERBOSE_INIT_ARM 748 printf("bootstrap done.\n"); 749 #endif 750 751 #ifdef IPKDB 752 /* Initialise ipkdb */ 753 ipkdb_init(); 754 if (boothowto & RB_KDB) 755 ipkdb_connect(0); 756 #endif /* NIPKDB */ 757 758 #if NKSYMS || defined(DDB) || defined(LKM) 759 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 760 #endif 761 762 #ifdef DDB 763 db_machine_init(); 764 if (boothowto & RB_KDB) 765 Debugger(); 766 #endif 767 768 /* We return the new stack pointer address */ 769 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 770 } 771 772 void 773 consinit(void) 774 { 775 static int consinit_called = 0; 776 777 if (consinit_called != 0) 778 return; 779 780 consinit_called = 1; 781 782 pmap_devmap_register(ixm1200_devmap); 783 784 if (ixpcomcnattach(&ixp12x0_bs_tag, 785 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 786 CONSPEED, CONMODE)) 787 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 788 } 789 790 /* 791 * For optimal cache cleaning we need two 16K banks of 792 * virtual address space that NOTHING else will access 793 * and then we alternate the cache cleaning between the 794 * two banks. 795 * The cache cleaning code requires requires 2 banks aligned 796 * on total size boundry so the banks can be alternated by 797 * eorring the size bit (assumes the bank size is a power of 2) 798 */ 799 void 800 ixdp_ixp12x0_cc_setup(void) 801 { 802 int loop; 803 paddr_t kaddr; 804 pt_entry_t *pte; 805 806 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 807 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 808 pte = vtopte(ixp12x0_cc_base + loop); 809 *pte = L2_S_PROTO | kaddr | 810 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 811 PTE_SYNC(pte); 812 } 813 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 814 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 815 } 816
Indexes created Thu Oct 02 14:10:14 GMT 2025