ixm1200_machdep.c revision 1.44
1 /* $NetBSD: ixm1200_machdep.c,v 1.44 2009/11/27 03:23:07 rmind 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 * 17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR 18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR 21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 /* 30 * Copyright (c) 1997,1998 Mark Brinicombe. 31 * Copyright (c) 1997,1998 Causality Limited. 32 * All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. All advertising materials mentioning features or use of this software 43 * must display the following acknowledgement: 44 * This product includes software developed by Mark Brinicombe 45 * for the NetBSD Project. 46 * 4. The name of the company nor the name of the author may be used to 47 * endorse or promote products derived from this software without specific 48 * prior written permission. 49 * 50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 51 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 52 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 53 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 54 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 55 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 60 * SUCH DAMAGE. 61 */ 62 63 #include <sys/cdefs.h> 64 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.44 2009/11/27 03:23:07 rmind Exp $"); 65 66 #include "opt_ddb.h" 67 #include "opt_modular.h" 68 #include "opt_pmap_debug.h" 69 70 #include <sys/param.h> 71 #include <sys/device.h> 72 #include <sys/systm.h> 73 #include <sys/kernel.h> 74 #include <sys/exec.h> 75 #include <sys/proc.h> 76 #include <sys/msgbuf.h> 77 #include <sys/reboot.h> 78 #include <sys/termios.h> 79 #include <sys/ksyms.h> 80 81 #include <uvm/uvm_extern.h> 82 83 #include <dev/cons.h> 84 85 #include "ksyms.h" 86 87 #if NKSYMS || defined(DDB) || defined(MODULAR) 88 #include <machine/db_machdep.h> 89 #include <ddb/db_sym.h> 90 #include <ddb/db_extern.h> 91 #ifndef DB_ELFSIZE 92 #error Must define DB_ELFSIZE! 93 #endif 94 #define ELFSIZE DB_ELFSIZE 95 #include <sys/exec_elf.h> 96 #endif 97 98 #include <machine/bootconfig.h> 99 #include <machine/bus.h> 100 #include <machine/cpu.h> 101 #include <machine/frame.h> 102 #include <arm/undefined.h> 103 104 #include <arm/arm32/machdep.h> 105 106 #include <arm/ixp12x0/ixp12x0reg.h> 107 #include <arm/ixp12x0/ixp12x0var.h> 108 #include <arm/ixp12x0/ixp12x0_comreg.h> 109 #include <arm/ixp12x0/ixp12x0_comvar.h> 110 #include <arm/ixp12x0/ixp12x0_pcireg.h> 111 112 #include <evbarm/ixm1200/ixm1200reg.h> 113 #include <evbarm/ixm1200/ixm1200var.h> 114 115 /* XXX for consinit related hacks */ 116 #include <sys/conf.h> 117 118 void ixp12x0_reset(void) __attribute__((noreturn)); 119 120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */ 121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000) 122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000) 123 124 /* 125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space 126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff 127 */ 128 #define KERNEL_VM_SIZE 0x0C000000 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 #define UND_STACK_SIZE 1 155 156 BootConfig bootconfig; /* Boot config storage */ 157 char *boot_args = NULL; 158 char *boot_file = NULL; 159 160 vm_offset_t physical_start; 161 vm_offset_t physical_freestart; 162 vm_offset_t physical_freeend; 163 vm_offset_t physical_end; 164 u_int free_pages; 165 vm_offset_t pagetables_start; 166 167 /*int debug_flags;*/ 168 #ifndef PMAP_STATIC_L1S 169 int max_processes = 64; /* Default number */ 170 #endif /* !PMAP_STATIC_L1S */ 171 172 /* Physical and virtual addresses for some global pages */ 173 pv_addr_t irqstack; 174 pv_addr_t undstack; 175 pv_addr_t abtstack; 176 pv_addr_t kernelstack; 177 178 vm_offset_t msgbufphys; 179 180 extern u_int data_abort_handler_address; 181 extern u_int prefetch_abort_handler_address; 182 extern u_int undefined_handler_address; 183 extern int end; 184 185 #ifdef PMAP_DEBUG 186 extern int pmap_debug_level; 187 #endif /* PMAP_DEBUG */ 188 189 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ 190 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ 191 #define KERNEL_PT_KERNEL_NUM 2 192 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 193 /* Page table for mapping IO */ 194 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1) 195 /* Page tables for mapping kernel VM */ 196 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 197 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 198 199 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 200 201 #ifdef CPU_IXP12X0 202 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2) 203 extern unsigned int ixp12x0_cache_clean_addr; 204 extern unsigned int ixp12x0_cache_clean_size; 205 static vaddr_t ixp12x0_cc_base; 206 #endif /* CPU_IXP12X0 */ 207 208 /* Prototypes */ 209 210 void consinit(void); 211 u_int cpu_get_control(void); 212 213 void ixdp_ixp12x0_cc_setup(void); 214 215 /* 216 * void cpu_reboot(int howto, char *bootstr) 217 * 218 * Reboots the system 219 * 220 * Deal with any syncing, unmounting, dumping and shutdown hooks, 221 * then reset the CPU. 222 */ 223 224 void 225 cpu_reboot(int howto, char *bootstr) 226 { 227 /* 228 * If we are still cold then hit the air brakes 229 * and crash to earth fast 230 */ 231 if (cold) { 232 doshutdownhooks(); 233 pmf_system_shutdown(boothowto); 234 printf("Halted while still in the ICE age.\n"); 235 printf("The operating system has halted.\n"); 236 printf("Please press any key to reboot.\n\n"); 237 cngetc(); 238 printf("rebooting...\n"); 239 ixp12x0_reset(); 240 } 241 242 /* Disable console buffering */ 243 cnpollc(1); 244 245 /* 246 * If RB_NOSYNC was not specified sync the discs. 247 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 248 * It looks like syslogd is getting woken up only to find that it cannot 249 * page part of the binary in as the filesystem has been unmounted. 250 */ 251 if (!(howto & RB_NOSYNC)) 252 bootsync(); 253 254 /* Say NO to interrupts */ 255 splhigh(); 256 257 /* Do a dump if requested. */ 258 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 259 dumpsys(); 260 261 /* Run any shutdown hooks */ 262 doshutdownhooks(); 263 264 pmf_system_shutdown(boothowto); 265 266 /* Make sure IRQ's are disabled */ 267 IRQdisable; 268 269 if (howto & RB_HALT) { 270 printf("The operating system has halted.\n"); 271 printf("Please press any key to reboot.\n\n"); 272 cngetc(); 273 } 274 275 printf("rebooting...\n"); 276 277 /* all interrupts are disabled */ 278 disable_interrupts(I32_bit); 279 280 ixp12x0_reset(); 281 282 /* ...and if that didn't work, just croak. */ 283 printf("RESET FAILED!\n"); 284 for (;;); 285 } 286 287 /* Static device mappings. */ 288 static const struct pmap_devmap ixm1200_devmap[] = { 289 /* StrongARM System and Peripheral Registers */ 290 { 291 IXP12X0_SYS_VBASE, 292 IXP12X0_SYS_HWBASE, 293 IXP12X0_SYS_SIZE, 294 VM_PROT_READ|VM_PROT_WRITE, 295 PTE_NOCACHE, 296 }, 297 /* PCI Registers Accessible Through StrongARM Core */ 298 { 299 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 300 IXP12X0_PCI_SIZE, 301 VM_PROT_READ|VM_PROT_WRITE, 302 PTE_NOCACHE, 303 }, 304 /* PCI Registers Accessible Through I/O Cycle Access */ 305 { 306 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 307 IXP12X0_PCI_IO_SIZE, 308 VM_PROT_READ|VM_PROT_WRITE, 309 PTE_NOCACHE, 310 }, 311 /* PCI Type0 Configuration Space */ 312 { 313 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 314 IXP12X0_PCI_TYPE0_SIZE, 315 VM_PROT_READ|VM_PROT_WRITE, 316 PTE_NOCACHE, 317 }, 318 /* PCI Type1 Configuration Space */ 319 { 320 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 321 IXP12X0_PCI_TYPE1_SIZE, 322 VM_PROT_READ|VM_PROT_WRITE, 323 PTE_NOCACHE, 324 }, 325 { 326 0, 327 0, 328 0, 329 0, 330 0 331 }, 332 }; 333 334 /* 335 * Initial entry point on startup. This gets called before main() is 336 * entered. 337 * It should be responsible for setting up everything that must be 338 * in place when main is called. 339 * This includes 340 * Taking a copy of the boot configuration structure. 341 * Initialising the physical console so characters can be printed. 342 * Setting up page tables for the kernel 343 * Relocating the kernel to the bottom of physical memory 344 */ 345 u_int 346 initarm(void *arg) 347 { 348 int loop; 349 int loop1; 350 u_int kerneldatasize, symbolsize; 351 vaddr_t l1pagetable; 352 vaddr_t freemempos; 353 #if NKSYMS || defined(DDB) || defined(MODULAR) 354 Elf_Shdr *sh; 355 #endif 356 357 /* 358 * Since we map v0xf0000000 == p0x90000000, it's possible for 359 * us to initialize the console now. 360 */ 361 consinit(); 362 363 #ifdef VERBOSE_INIT_ARM 364 /* Talk to the user */ 365 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 366 #endif 367 368 /* 369 * Heads up ... Setup the CPU / MMU / TLB functions 370 */ 371 if (set_cpufuncs()) 372 panic("CPU not recognized!"); 373 374 /* XXX overwrite bootconfig to hardcoded values */ 375 bootconfig.dram[0].address = 0xc0000000; 376 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 377 bootconfig.dramblocks = 1; 378 379 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 380 381 symbolsize = 0; 382 383 #ifdef PMAP_DEBUG 384 pmap_debug(-1); 385 #endif 386 387 #if NKSYMS || defined(DDB) || defined(MODULAR) 388 if (! memcmp(&end, "\177ELF", 4)) { 389 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 390 loop = ((Elf_Ehdr *)&end)->e_shnum; 391 for(; loop; loop--, sh++) 392 if (sh->sh_offset > 0 && 393 (sh->sh_offset + sh->sh_size) > symbolsize) 394 symbolsize = sh->sh_offset + sh->sh_size; 395 } 396 #endif 397 #ifdef VERBOSE_INIT_ARM 398 printf("kernsize=0x%x\n", kerneldatasize); 399 #endif 400 kerneldatasize += symbolsize; 401 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 402 403 /* 404 * Set up the variables that define the availablilty of physcial 405 * memory 406 */ 407 physical_start = bootconfig.dram[0].address; 408 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 409 410 physical_freestart = physical_start 411 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 412 physical_freeend = physical_end; 413 414 physmem = (physical_end - physical_start) / PAGE_SIZE; 415 416 freemempos = 0xc0000000; 417 418 #ifdef VERBOSE_INIT_ARM 419 printf("Allocating page tables\n"); 420 #endif 421 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 422 423 #ifdef VERBOSE_INIT_ARM 424 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 425 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 426 physical_freestart, free_pages, free_pages); 427 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 428 physical_start, physical_end); 429 #endif 430 431 /* Define a macro to simplify memory allocation */ 432 #define valloc_pages(var, np) \ 433 alloc_pages((var).pv_pa, (np)); \ 434 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 435 #define alloc_pages(var, np) \ 436 (var) = freemempos; \ 437 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 438 freemempos += (np) * PAGE_SIZE; 439 440 loop1 = 0; 441 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 442 /* Are we 16KB aligned for an L1 ? */ 443 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 444 && kernel_l1pt.pv_pa == 0) { 445 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 446 } else { 447 valloc_pages(kernel_pt_table[loop1], 448 L2_TABLE_SIZE / PAGE_SIZE); 449 ++loop1; 450 } 451 } 452 453 #ifdef DIAGNOSTIC 454 /* This should never be able to happen but better confirm that. */ 455 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 456 panic("initarm: Failed to align the kernel page directory"); 457 #endif 458 459 /* 460 * Allocate a page for the system page mapped to V0x00000000 461 * This page will just contain the system vectors and can be 462 * shared by all processes. 463 */ 464 alloc_pages(systempage.pv_pa, 1); 465 466 /* Allocate stacks for all modes */ 467 valloc_pages(irqstack, IRQ_STACK_SIZE); 468 valloc_pages(abtstack, ABT_STACK_SIZE); 469 valloc_pages(undstack, UND_STACK_SIZE); 470 valloc_pages(kernelstack, UPAGES); 471 472 #ifdef VERBOSE_INIT_ARM 473 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 474 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 475 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 476 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 477 #endif 478 479 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 480 481 #ifdef CPU_IXP12X0 482 /* 483 * XXX totally stuffed hack to work round problems introduced 484 * in recent versions of the pmap code. Due to the calls used there 485 * we cannot allocate virtual memory during bootstrap. 486 */ 487 for(;;) { 488 alloc_pages(ixp12x0_cc_base, 1); 489 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 490 break; 491 } 492 { 493 vaddr_t dummy; 494 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 495 } 496 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 497 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 498 #endif /* CPU_IXP12X0 */ 499 500 #ifdef VERBOSE_INIT_ARM 501 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 502 #endif 503 504 /* 505 * Now we start construction of the L1 page table 506 * We start by mapping the L2 page tables into the L1. 507 * This means that we can replace L1 mappings later on if necessary 508 */ 509 l1pagetable = kernel_l1pt.pv_pa; 510 511 /* Map the L2 pages tables in the L1 page table */ 512 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 513 &kernel_pt_table[KERNEL_PT_SYS]); 514 515 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 516 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 517 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 518 519 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 520 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 521 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 522 523 /* update the top of the kernel VM */ 524 pmap_curmaxkvaddr = 525 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 526 527 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 528 &kernel_pt_table[KERNEL_PT_IO]); 529 530 #ifdef VERBOSE_INIT_ARM 531 printf("Mapping kernel\n"); 532 #endif 533 534 #if XXX 535 /* Now we fill in the L2 pagetable for the kernel code/data */ 536 { 537 extern char etext[], _end[]; 538 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 539 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 540 u_int logical; 541 542 textsize = (textsize + PGOFSET) & ~PGOFSET; 543 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 544 545 logical = 0x00200000; /* offset of kernel in RAM */ 546 547 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 548 physical_start + logical, textsize, 549 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 550 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 551 physical_start + logical, totalsize - textsize, 552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 553 } 554 #else 555 { 556 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 557 KERNEL_TEXT_BASE, kerneldatasize, 558 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 559 } 560 #endif 561 562 #ifdef VERBOSE_INIT_ARM 563 printf("Constructing L2 page tables\n"); 564 #endif 565 566 /* Map the stack pages */ 567 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 568 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 570 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 571 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 572 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 573 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 574 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 575 576 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 577 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 578 579 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 580 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 581 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 582 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 583 } 584 585 /* Map the vector page. */ 586 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 587 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 588 589 #ifdef VERBOSE_INIT_ARM 590 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 591 systempage.pv_pa, vector_page); 592 #endif 593 594 /* Map the statically mapped devices. */ 595 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 596 597 #ifdef VERBOSE_INIT_ARM 598 printf("done.\n"); 599 #endif 600 601 /* 602 * Map the Dcache Flush page. 603 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 604 */ 605 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 606 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 607 608 /* 609 * Now we have the real page tables in place so we can switch to them. 610 * Once this is done we will be running with the REAL kernel page 611 * tables. 612 */ 613 614 /* Switch tables */ 615 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 616 setttb(kernel_l1pt.pv_pa); 617 cpu_tlb_flushID(); 618 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 619 620 /* 621 * Moved here from cpu_startup() as data_abort_handler() references 622 * this during init 623 */ 624 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 625 626 /* 627 * We must now clean the cache again.... 628 * Cleaning may be done by reading new data to displace any 629 * dirty data in the cache. This will have happened in setttb() 630 * but since we are boot strapping the addresses used for the read 631 * may have just been remapped and thus the cache could be out 632 * of sync. A re-clean after the switch will cure this. 633 * After booting there are no gross reloations of the kernel thus 634 * this problem will not occur after initarm(). 635 */ 636 cpu_idcache_wbinv_all(); 637 638 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 639 640 /* 641 * Pages were allocated during the secondary bootstrap for the 642 * stacks for different CPU modes. 643 * We must now set the r13 registers in the different CPU modes to 644 * point to these stacks. 645 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 646 * of the stack memory. 647 */ 648 #ifdef VERBOSE_INIT_ARM 649 printf("init subsystems: stacks "); 650 #endif 651 652 set_stackptr(PSR_IRQ32_MODE, 653 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 654 set_stackptr(PSR_ABT32_MODE, 655 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 656 set_stackptr(PSR_UND32_MODE, 657 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 658 #ifdef PMAP_DEBUG 659 if (pmap_debug_level >= 0) 660 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 661 kernelstack.pv_pa); 662 #endif /* PMAP_DEBUG */ 663 664 /* 665 * Well we should set a data abort handler. 666 * Once things get going this will change as we will need a proper 667 * handler. Until then we will use a handler that just panics but 668 * tells us why. 669 * Initialisation of the vetcors will just panic on a data abort. 670 * This just fills in a slightly better one. 671 */ 672 #ifdef VERBOSE_INIT_ARM 673 printf("vectors "); 674 #endif 675 data_abort_handler_address = (u_int)data_abort_handler; 676 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 677 undefined_handler_address = (u_int)undefinedinstruction_bounce; 678 #ifdef VERBOSE_INIT_ARM 679 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 680 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 681 printf("undefined_handler_address = %08x\n", undefined_handler_address); 682 #endif 683 684 /* Initialise the undefined instruction handlers */ 685 #ifdef VERBOSE_INIT_ARM 686 printf("undefined "); 687 #endif 688 undefined_init(); 689 690 /* Load memory into UVM. */ 691 #ifdef VERBOSE_INIT_ARM 692 printf("page "); 693 #endif 694 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 695 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 696 atop(physical_freestart), atop(physical_freeend), 697 VM_FREELIST_DEFAULT); 698 699 /* Boot strap pmap telling it where the kernel page table is */ 700 #ifdef VERBOSE_INIT_ARM 701 printf("pmap "); 702 #endif 703 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 704 705 /* Setup the IRQ system */ 706 #ifdef VERBOSE_INIT_ARM 707 printf("irq "); 708 #endif 709 ixp12x0_intr_init(); 710 711 #ifdef VERBOSE_INIT_ARM 712 printf("done.\n"); 713 #endif 714 715 #ifdef VERBOSE_INIT_ARM 716 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 717 physical_freestart, free_pages, free_pages); 718 printf("freemempos=%08lx\n", freemempos); 719 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 720 #endif 721 722 consinit(); 723 #ifdef VERBOSE_INIT_ARM 724 printf("consinit \n"); 725 #endif 726 727 ixdp_ixp12x0_cc_setup(); 728 729 #ifdef VERBOSE_INIT_ARM 730 printf("bootstrap done.\n"); 731 #endif 732 733 #if NKSYMS || defined(DDB) || defined(MODULAR) 734 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 735 #endif 736 737 #ifdef DDB 738 db_machine_init(); 739 if (boothowto & RB_KDB) 740 Debugger(); 741 #endif 742 743 /* We return the new stack pointer address */ 744 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 745 } 746 747 void 748 consinit(void) 749 { 750 static int consinit_called = 0; 751 752 if (consinit_called != 0) 753 return; 754 755 consinit_called = 1; 756 757 pmap_devmap_register(ixm1200_devmap); 758 759 if (ixpcomcnattach(&ixp12x0_bs_tag, 760 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 761 CONSPEED, CONMODE)) 762 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 763 } 764 765 /* 766 * For optimal cache cleaning we need two 16K banks of 767 * virtual address space that NOTHING else will access 768 * and then we alternate the cache cleaning between the 769 * two banks. 770 * The cache cleaning code requires requires 2 banks aligned 771 * on total size boundry so the banks can be alternated by 772 * eorring the size bit (assumes the bank size is a power of 2) 773 */ 774 void 775 ixdp_ixp12x0_cc_setup(void) 776 { 777 int loop; 778 paddr_t kaddr; 779 pt_entry_t *pte; 780 781 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 782 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 783 pte = vtopte(ixp12x0_cc_base + loop); 784 *pte = L2_S_PROTO | kaddr | 785 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 786 PTE_SYNC(pte); 787 } 788 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 789 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 790 } 791
Indexes created Thu Oct 02 14:10:14 GMT 2025