ixm1200_machdep.c revision 1.36
1 /* $NetBSD: ixm1200_machdep.c,v 1.36 2008/11/12 12:35:59 ad 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 1.36 2008/11/12 12:35:59 ad 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(MODULAR) 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 pmf_system_shutdown(boothowto); 244 printf("Halted while still in the ICE age.\n"); 245 printf("The operating system has halted.\n"); 246 printf("Please press any key to reboot.\n\n"); 247 cngetc(); 248 printf("rebooting...\n"); 249 ixp12x0_reset(); 250 } 251 252 /* Disable console buffering */ 253 cnpollc(1); 254 255 /* 256 * If RB_NOSYNC was not specified sync the discs. 257 * Note: Unless cold is set to 1 here, syslogd will die during the unmount. 258 * It looks like syslogd is getting woken up only to find that it cannot 259 * page part of the binary in as the filesystem has been unmounted. 260 */ 261 if (!(howto & RB_NOSYNC)) 262 bootsync(); 263 264 /* Say NO to interrupts */ 265 splhigh(); 266 267 /* Do a dump if requested. */ 268 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) 269 dumpsys(); 270 271 /* Run any shutdown hooks */ 272 doshutdownhooks(); 273 274 pmf_system_shutdown(boothowto); 275 276 /* Make sure IRQ's are disabled */ 277 IRQdisable; 278 279 if (howto & RB_HALT) { 280 printf("The operating system has halted.\n"); 281 printf("Please press any key to reboot.\n\n"); 282 cngetc(); 283 } 284 285 printf("rebooting...\n"); 286 287 /* all interrupts are disabled */ 288 disable_interrupts(I32_bit); 289 290 ixp12x0_reset(); 291 292 /* ...and if that didn't work, just croak. */ 293 printf("RESET FAILED!\n"); 294 for (;;); 295 } 296 297 /* Static device mappings. */ 298 static const struct pmap_devmap ixm1200_devmap[] = { 299 /* StrongARM System and Peripheral Registers */ 300 { 301 IXP12X0_SYS_VBASE, 302 IXP12X0_SYS_HWBASE, 303 IXP12X0_SYS_SIZE, 304 VM_PROT_READ|VM_PROT_WRITE, 305 PTE_NOCACHE, 306 }, 307 /* PCI Registers Accessible Through StrongARM Core */ 308 { 309 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE, 310 IXP12X0_PCI_SIZE, 311 VM_PROT_READ|VM_PROT_WRITE, 312 PTE_NOCACHE, 313 }, 314 /* PCI Registers Accessible Through I/O Cycle Access */ 315 { 316 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE, 317 IXP12X0_PCI_IO_SIZE, 318 VM_PROT_READ|VM_PROT_WRITE, 319 PTE_NOCACHE, 320 }, 321 /* PCI Type0 Configuration Space */ 322 { 323 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE, 324 IXP12X0_PCI_TYPE0_SIZE, 325 VM_PROT_READ|VM_PROT_WRITE, 326 PTE_NOCACHE, 327 }, 328 /* PCI Type1 Configuration Space */ 329 { 330 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE, 331 IXP12X0_PCI_TYPE1_SIZE, 332 VM_PROT_READ|VM_PROT_WRITE, 333 PTE_NOCACHE, 334 }, 335 { 336 0, 337 0, 338 0, 339 0, 340 0 341 }, 342 }; 343 344 /* 345 * Initial entry point on startup. This gets called before main() is 346 * entered. 347 * It should be responsible for setting up everything that must be 348 * in place when main is called. 349 * This includes 350 * Taking a copy of the boot configuration structure. 351 * Initialising the physical console so characters can be printed. 352 * Setting up page tables for the kernel 353 * Relocating the kernel to the bottom of physical memory 354 */ 355 u_int 356 initarm(void *arg) 357 { 358 int loop; 359 int loop1; 360 u_int kerneldatasize, symbolsize; 361 vaddr_t l1pagetable; 362 vaddr_t freemempos; 363 #if NKSYMS || defined(DDB) || defined(MODULAR) 364 Elf_Shdr *sh; 365 #endif 366 367 /* 368 * Since we map v0xf0000000 == p0x90000000, it's possible for 369 * us to initialize the console now. 370 */ 371 consinit(); 372 373 #ifdef VERBOSE_INIT_ARM 374 /* Talk to the user */ 375 printf("\nNetBSD/evbarm (IXM1200) booting ...\n"); 376 #endif 377 378 /* 379 * Heads up ... Setup the CPU / MMU / TLB functions 380 */ 381 if (set_cpufuncs()) 382 panic("CPU not recognized!"); 383 384 /* XXX overwrite bootconfig to hardcoded values */ 385 bootconfig.dram[0].address = 0xc0000000; 386 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */ 387 bootconfig.dramblocks = 1; 388 389 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE; 390 391 symbolsize = 0; 392 393 #ifdef PMAP_DEBUG 394 pmap_debug(-1); 395 #endif 396 397 #if NKSYMS || defined(DDB) || defined(MODULAR) 398 if (! memcmp(&end, "\177ELF", 4)) { 399 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 400 loop = ((Elf_Ehdr *)&end)->e_shnum; 401 for(; loop; loop--, sh++) 402 if (sh->sh_offset > 0 && 403 (sh->sh_offset + sh->sh_size) > symbolsize) 404 symbolsize = sh->sh_offset + sh->sh_size; 405 } 406 #endif 407 #ifdef VERBOSE_INIT_ARM 408 printf("kernsize=0x%x\n", kerneldatasize); 409 #endif 410 kerneldatasize += symbolsize; 411 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8; 412 413 /* 414 * Set up the variables that define the availablilty of physcial 415 * memory 416 */ 417 physical_start = bootconfig.dram[0].address; 418 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE); 419 420 physical_freestart = physical_start 421 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 422 physical_freeend = physical_end; 423 424 physmem = (physical_end - physical_start) / PAGE_SIZE; 425 426 freemempos = 0xc0000000; 427 428 #ifdef VERBOSE_INIT_ARM 429 printf("Allocating page tables\n"); 430 #endif 431 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; 432 433 #ifdef VERBOSE_INIT_ARM 434 printf("CP15 Register1 = 0x%08x\n", cpu_get_control()); 435 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n", 436 physical_freestart, free_pages, free_pages); 437 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n", 438 physical_start, physical_end); 439 #endif 440 441 /* Define a macro to simplify memory allocation */ 442 #define valloc_pages(var, np) \ 443 alloc_pages((var).pv_pa, (np)); \ 444 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; 445 #define alloc_pages(var, np) \ 446 (var) = freemempos; \ 447 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \ 448 freemempos += (np) * PAGE_SIZE; 449 450 loop1 = 0; 451 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { 452 /* Are we 16KB aligned for an L1 ? */ 453 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0 454 && kernel_l1pt.pv_pa == 0) { 455 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 456 } else { 457 valloc_pages(kernel_pt_table[loop1], 458 L2_TABLE_SIZE / PAGE_SIZE); 459 ++loop1; 460 } 461 } 462 463 #ifdef DIAGNOSTIC 464 /* This should never be able to happen but better confirm that. */ 465 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 466 panic("initarm: Failed to align the kernel page directory"); 467 #endif 468 469 /* 470 * Allocate a page for the system page mapped to V0x00000000 471 * This page will just contain the system vectors and can be 472 * shared by all processes. 473 */ 474 alloc_pages(systempage.pv_pa, 1); 475 476 /* Allocate stacks for all modes */ 477 valloc_pages(irqstack, IRQ_STACK_SIZE); 478 valloc_pages(abtstack, ABT_STACK_SIZE); 479 valloc_pages(undstack, UND_STACK_SIZE); 480 valloc_pages(kernelstack, UPAGES); 481 482 #ifdef VERBOSE_INIT_ARM 483 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va); 484 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va); 485 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va); 486 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va); 487 #endif 488 489 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 490 491 #ifdef CPU_IXP12X0 492 /* 493 * XXX totally stuffed hack to work round problems introduced 494 * in recent versions of the pmap code. Due to the calls used there 495 * we cannot allocate virtual memory during bootstrap. 496 */ 497 for(;;) { 498 alloc_pages(ixp12x0_cc_base, 1); 499 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1))) 500 break; 501 } 502 { 503 vaddr_t dummy; 504 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 505 } 506 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 507 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 508 #endif /* CPU_IXP12X0 */ 509 510 #ifdef VERBOSE_INIT_ARM 511 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); 512 #endif 513 514 /* 515 * Now we start construction of the L1 page table 516 * We start by mapping the L2 page tables into the L1. 517 * This means that we can replace L1 mappings later on if necessary 518 */ 519 l1pagetable = kernel_l1pt.pv_pa; 520 521 /* Map the L2 pages tables in the L1 page table */ 522 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1), 523 &kernel_pt_table[KERNEL_PT_SYS]); 524 525 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) 526 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 527 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 528 529 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) 530 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 531 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 532 533 /* update the top of the kernel VM */ 534 pmap_curmaxkvaddr = 535 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 536 537 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE, 538 &kernel_pt_table[KERNEL_PT_IO]); 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("Mapping kernel\n"); 542 #endif 543 544 #if XXX 545 /* Now we fill in the L2 pagetable for the kernel code/data */ 546 { 547 extern char etext[], _end[]; 548 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE; 549 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE; 550 u_int logical; 551 552 textsize = (textsize + PGOFSET) & ~PGOFSET; 553 totalsize = (totalsize + PGOFSET) & ~PGOFSET; 554 555 logical = 0x00200000; /* offset of kernel in RAM */ 556 557 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 558 physical_start + logical, textsize, 559 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 560 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical, 561 physical_start + logical, totalsize - textsize, 562 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 563 } 564 #else 565 { 566 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 567 KERNEL_TEXT_BASE, kerneldatasize, 568 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 569 } 570 #endif 571 572 #ifdef VERBOSE_INIT_ARM 573 printf("Constructing L2 page tables\n"); 574 #endif 575 576 /* Map the stack pages */ 577 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 578 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 579 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 580 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 581 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 582 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 583 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 584 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 585 586 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 587 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 588 589 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 590 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va, 591 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, 592 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 593 } 594 595 /* Map the vector page. */ 596 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa, 597 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 598 599 #ifdef VERBOSE_INIT_ARM 600 printf("systempage (vector page): p0x%08lx v0x%08lx\n", 601 systempage.pv_pa, vector_page); 602 #endif 603 604 /* Map the statically mapped devices. */ 605 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap); 606 607 #ifdef VERBOSE_INIT_ARM 608 printf("done.\n"); 609 #endif 610 611 /* 612 * Map the Dcache Flush page. 613 * Hw Ref Manual 3.2.4.5 Software Dcache Flush 614 */ 615 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000, 616 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE); 617 618 /* 619 * Now we have the real page tables in place so we can switch to them. 620 * Once this is done we will be running with the REAL kernel page 621 * tables. 622 */ 623 624 /* Switch tables */ 625 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 626 setttb(kernel_l1pt.pv_pa); 627 cpu_tlb_flushID(); 628 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 629 630 /* 631 * Moved here from cpu_startup() as data_abort_handler() references 632 * this during init 633 */ 634 proc0paddr = (struct user *)kernelstack.pv_va; 635 lwp0.l_addr = proc0paddr; 636 637 /* 638 * We must now clean the cache again.... 639 * Cleaning may be done by reading new data to displace any 640 * dirty data in the cache. This will have happened in setttb() 641 * but since we are boot strapping the addresses used for the read 642 * may have just been remapped and thus the cache could be out 643 * of sync. A re-clean after the switch will cure this. 644 * After booting there are no gross reloations of the kernel thus 645 * this problem will not occur after initarm(). 646 */ 647 cpu_idcache_wbinv_all(); 648 649 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); 650 651 /* 652 * Pages were allocated during the secondary bootstrap for the 653 * stacks for different CPU modes. 654 * We must now set the r13 registers in the different CPU modes to 655 * point to these stacks. 656 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 657 * of the stack memory. 658 */ 659 #ifdef VERBOSE_INIT_ARM 660 printf("init subsystems: stacks "); 661 #endif 662 663 set_stackptr(PSR_IRQ32_MODE, 664 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 665 set_stackptr(PSR_ABT32_MODE, 666 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 667 set_stackptr(PSR_UND32_MODE, 668 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 669 #ifdef PMAP_DEBUG 670 if (pmap_debug_level >= 0) 671 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 672 kernelstack.pv_pa); 673 #endif /* PMAP_DEBUG */ 674 675 /* 676 * Well we should set a data abort handler. 677 * Once things get going this will change as we will need a proper 678 * handler. Until then we will use a handler that just panics but 679 * tells us why. 680 * Initialisation of the vetcors will just panic on a data abort. 681 * This just fills in a slightly better one. 682 */ 683 #ifdef VERBOSE_INIT_ARM 684 printf("vectors "); 685 #endif 686 data_abort_handler_address = (u_int)data_abort_handler; 687 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 688 undefined_handler_address = (u_int)undefinedinstruction_bounce; 689 #ifdef VERBOSE_INIT_ARM 690 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address); 691 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address); 692 printf("undefined_handler_address = %08x\n", undefined_handler_address); 693 #endif 694 695 /* Initialise the undefined instruction handlers */ 696 #ifdef VERBOSE_INIT_ARM 697 printf("undefined "); 698 #endif 699 undefined_init(); 700 701 /* Load memory into UVM. */ 702 #ifdef VERBOSE_INIT_ARM 703 printf("page "); 704 #endif 705 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 706 uvm_page_physload(atop(physical_freestart), atop(physical_freeend), 707 atop(physical_freestart), atop(physical_freeend), 708 VM_FREELIST_DEFAULT); 709 710 /* Boot strap pmap telling it where the kernel page table is */ 711 #ifdef VERBOSE_INIT_ARM 712 printf("pmap "); 713 #endif 714 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 715 716 /* Setup the IRQ system */ 717 #ifdef VERBOSE_INIT_ARM 718 printf("irq "); 719 #endif 720 ixp12x0_intr_init(); 721 722 #ifdef VERBOSE_INIT_ARM 723 printf("done.\n"); 724 #endif 725 726 #ifdef VERBOSE_INIT_ARM 727 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n", 728 physical_freestart, free_pages, free_pages); 729 printf("freemempos=%08lx\n", freemempos); 730 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa); 731 #endif 732 733 consinit(); 734 #ifdef VERBOSE_INIT_ARM 735 printf("consinit \n"); 736 #endif 737 738 ixdp_ixp12x0_cc_setup(); 739 740 #ifdef VERBOSE_INIT_ARM 741 printf("bootstrap done.\n"); 742 #endif 743 744 #if NKSYMS || defined(DDB) || defined(MODULAR) 745 ksyms_init(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 746 #endif 747 748 #ifdef DDB 749 db_machine_init(); 750 if (boothowto & RB_KDB) 751 Debugger(); 752 #endif 753 754 /* We return the new stack pointer address */ 755 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); 756 } 757 758 void 759 consinit(void) 760 { 761 static int consinit_called = 0; 762 763 if (consinit_called != 0) 764 return; 765 766 consinit_called = 1; 767 768 pmap_devmap_register(ixm1200_devmap); 769 770 if (ixpcomcnattach(&ixp12x0_bs_tag, 771 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE, 772 CONSPEED, CONMODE)) 773 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE); 774 } 775 776 /* 777 * For optimal cache cleaning we need two 16K banks of 778 * virtual address space that NOTHING else will access 779 * and then we alternate the cache cleaning between the 780 * two banks. 781 * The cache cleaning code requires requires 2 banks aligned 782 * on total size boundry so the banks can be alternated by 783 * eorring the size bit (assumes the bank size is a power of 2) 784 */ 785 void 786 ixdp_ixp12x0_cc_setup(void) 787 { 788 int loop; 789 paddr_t kaddr; 790 pt_entry_t *pte; 791 792 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr); 793 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) { 794 pte = vtopte(ixp12x0_cc_base + loop); 795 *pte = L2_S_PROTO | kaddr | 796 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode; 797 PTE_SYNC(pte); 798 } 799 ixp12x0_cache_clean_addr = ixp12x0_cc_base; 800 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2; 801 } 802
Indexes created Thu Oct 02 14:10:14 GMT 2025