1 /* $NetBSD: sa11x0_hpc_machdep.c,v 1.23 2023/08/03 08:16:31 mrg Exp $ */ 2 3 /* 4 * Copyright (c) 1994-1998 Mark Brinicombe. 5 * Copyright (c) 1994 Brini. 6 * All rights reserved. 7 * 8 * This code is derived from software written for Brini by Mark Brinicombe 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by Brini. 21 * 4. The name of the company nor the name of the author may be used to 22 * endorse or promote products derived from this software without specific 23 * prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 /* 39 * Machine dependent functions for kernel setup. 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: sa11x0_hpc_machdep.c,v 1.23 2023/08/03 08:16:31 mrg Exp $"); 44 45 #include "opt_ddb.h" 46 #include "opt_dram_pages.h" 47 #include "opt_modular.h" 48 #include "ksyms.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/kernel.h> 53 #include <sys/reboot.h> 54 #include <sys/proc.h> 55 #include <sys/msgbuf.h> 56 #include <sys/exec.h> 57 #include <sys/ksyms.h> 58 #include <sys/conf.h> /* XXX for consinit related hacks */ 59 #include <sys/device.h> 60 #include <sys/termios.h> 61 #include <sys/bus.h> 62 #include <sys/cpu.h> 63 #include <sys/intr.h> 64 65 #if NKSYMS || defined(DDB) || defined(MODULAR) 66 #include <machine/db_machdep.h> 67 #include <ddb/db_sym.h> 68 #include <ddb/db_extern.h> 69 #include <sys/exec_elf.h> 70 #endif 71 72 #include <uvm/uvm.h> 73 74 #include <arm/arm32/machdep.h> 75 #include <arm/sa11x0/sa11x0_reg.h> 76 #include <arm/locore.h> 77 #include <arm/undefined.h> 78 79 #include <machine/bootconfig.h> 80 #include <machine/bootinfo.h> 81 #include <machine/io.h> 82 #include <machine/platid.h> 83 #include <machine/platid_mask.h> 84 #include <machine/rtc.h> 85 #include <machine/signal.h> 86 87 #include <dev/cons.h> 88 #include <dev/hpc/apm/apmvar.h> 89 #include <dev/hpc/bicons.h> 90 91 /* Kernel text starts 256K in from the bottom of the kernel address space. */ 92 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00040000) 93 #define KERNEL_VM_BASE (KERNEL_BASE + 0x00C00000) 94 #define KERNEL_VM_SIZE 0x05000000 95 96 extern BootConfig bootconfig; /* Boot config storage */ 97 98 extern paddr_t physical_start; 99 extern paddr_t physical_freestart; 100 extern paddr_t physical_freeend; 101 extern paddr_t physical_end; 102 103 extern paddr_t msgbufphys; 104 105 extern int end; 106 107 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */ 108 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */ 109 #define KERNEL_PT_IO 2 /* Page table for mapping IO */ 110 #define KERNEL_PT_KERNEL 3 /* Page table for mapping kernel */ 111 #define KERNEL_PT_KERNEL_NUM 4 112 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM) 113 /* Page tables for mapping kernel VM */ 114 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ 115 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) 116 117 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; 118 119 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2) 120 extern unsigned int sa1_cache_clean_addr; 121 extern unsigned int sa1_cache_clean_size; 122 static vaddr_t sa1_cc_base; 123 124 /* Non-buffered non-cacheable memory needed to enter idle mode */ 125 extern vaddr_t sa11x0_idle_mem; 126 127 /* Prototypes */ 128 void data_abort_handler(trapframe_t *); 129 void prefetch_abort_handler(trapframe_t *); 130 void undefinedinstruction_bounce(trapframe_t *); 131 u_int cpu_get_control(void); 132 133 vaddr_t init_sa11x0(int, char **, struct bootinfo *); 134 135 #ifdef BOOT_DUMP 136 void dumppages(char *, int); 137 #endif 138 139 #ifdef DEBUG_BEFOREMMU 140 static void fakecninit(void); 141 #endif 142 143 /* Mode dependent sleep function holder */ 144 extern void (*__sleep_func)(void *); 145 extern void *__sleep_ctx; 146 147 /* Number of DRAM pages which are installed */ 148 /* Units are 4K pages, so 8192 is 32 MB of memory */ 149 #ifndef DRAM_PAGES 150 #define DRAM_PAGES 8192 151 #endif 152 153 /* 154 * Static device mappings. These peripheral registers are mapped at 155 * fixed virtual addresses very early in initarm() so that we can use 156 * them while booting the kernel and stay at the same address 157 * throughout whole kernel's life time. 158 */ 159 static const struct pmap_devmap sa11x0_devmap[] = { 160 /* Physical/virtual address for UART #3. */ 161 DEVMAP_ENTRY( 162 SACOM3_VBASE, 163 SACOM3_BASE, 164 0x24 165 ), 166 DEVMAP_ENTRY_END 167 }; 168 169 /* 170 * It should be responsible for setting up everything that must be 171 * in place when main is called. 172 * This includes: 173 * Initializing the physical console so characters can be printed. 174 * Setting up page tables for the kernel. 175 */ 176 vaddr_t 177 init_sa11x0(int argc, char **argv, struct bootinfo *bi) 178 { 179 u_int kerneldatasize, symbolsize; 180 u_int l1pagetable; 181 vaddr_t freemempos; 182 vsize_t pt_size; 183 int loop; 184 #if NKSYMS || defined(DDB) || defined(MODULAR) 185 Elf_Shdr *sh; 186 #endif 187 188 #ifdef DEBUG_BEFOREMMU 189 /* 190 * At this point, we cannot call real consinit(). 191 * Just call a faked up version of consinit(), which does the thing 192 * with MMU disabled. 193 */ 194 fakecninit(); 195 #endif 196 197 /* 198 * XXX for now, overwrite bootconfig to hardcoded values. 199 * XXX kill bootconfig and directly call uvm_physload 200 */ 201 bootconfig.dram[0].address = 0xc0000000; 202 bootconfig.dram[0].pages = DRAM_PAGES; 203 bootconfig.dramblocks = 1; 204 205 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE; 206 symbolsize = 0; 207 #if NKSYMS || defined(DDB) || defined(MODULAR) 208 if (!memcmp(&end, "\177ELF", 4)) { 209 /* 210 * XXXGCC12. 211 * This accesses beyond what "int end" technically supplies. 212 */ 213 #pragma GCC push_options 214 #pragma GCC diagnostic ignored "-Warray-bounds" 215 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff); 216 #pragma GCC pop_options 217 loop = ((Elf_Ehdr *)&end)->e_shnum; 218 for (; loop; loop--, sh++) 219 if (sh->sh_offset > 0 && 220 (sh->sh_offset + sh->sh_size) > symbolsize) 221 symbolsize = sh->sh_offset + sh->sh_size; 222 } 223 #endif 224 225 printf("kernsize=0x%x\n", kerneldatasize); 226 kerneldatasize += symbolsize; 227 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + 228 PAGE_SIZE * 8; 229 230 /* 231 * hpcboot has loaded me with MMU disabled. 232 * So create kernel page tables and enable MMU. 233 */ 234 235 /* 236 * Set up the variables that define the availability of physical 237 * memory. 238 */ 239 physical_start = bootconfig.dram[0].address; 240 physical_freestart = physical_start 241 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize; 242 physical_end = bootconfig.dram[bootconfig.dramblocks - 1].address 243 + bootconfig.dram[bootconfig.dramblocks - 1].pages * PAGE_SIZE; 244 physical_freeend = physical_end; 245 246 for (loop = 0; loop < bootconfig.dramblocks; ++loop) 247 physmem += bootconfig.dram[loop].pages; 248 249 /* XXX handle UMA framebuffer memory */ 250 251 /* Use the first 256kB to allocate things */ 252 freemempos = KERNEL_BASE; 253 memset((void *)KERNEL_BASE, 0, KERNEL_TEXT_BASE - KERNEL_BASE); 254 255 /* 256 * Right. We have the bottom meg of memory mapped to 0x00000000 257 * so was can get at it. The kernel will occupy the start of it. 258 * After the kernel/args we allocate some of the fixed page tables 259 * we need to get the system going. 260 * We allocate one page directory and NUM_KERNEL_PTS page tables 261 * and store the physical addresses in the kernel_pt_table array. 262 * Must remember that neither the page L1 or L2 page tables are the 263 * same size as a page ! 264 * 265 * Ok, the next bit of physical allocate may look complex but it is 266 * simple really. I have done it like this so that no memory gets 267 * wasted during the allocate of various pages and tables that are 268 * all different sizes. 269 * The start address will be page aligned. 270 * We allocate the kernel page directory on the first free 16KB 271 * boundary we find. 272 * We allocate the kernel page tables on the first 1KB boundary we 273 * find. We allocate at least 9 PT's (12 currently). This means 274 * that in the process we KNOW that we will encounter at least one 275 * 16KB boundary. 276 * 277 * Eventually if the top end of the memory gets used for process L1 278 * page tables the kernel L1 page table may be moved up there. 279 */ 280 281 #ifdef VERBOSE_INIT_ARM 282 printf("Allocating page tables\n"); 283 #endif 284 285 /* Define a macro to simplify memory allocation */ 286 #define valloc_pages(var, np) \ 287 do { \ 288 alloc_pages((var).pv_pa, (np)); \ 289 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start; \ 290 } while (0) 291 #define alloc_pages(var, np) \ 292 do { \ 293 (var) = freemempos; \ 294 freemempos += (np) * PAGE_SIZE; \ 295 if (freemempos > KERNEL_TEXT_BASE) \ 296 panic("%s: out of memory", __func__); \ 297 } while (0) 298 299 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); 300 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { 301 alloc_pages(kernel_pt_table[loop].pv_pa, 302 L2_TABLE_SIZE / PAGE_SIZE); 303 kernel_pt_table[loop].pv_va = kernel_pt_table[loop].pv_pa; 304 } 305 306 /* This should never be able to happen but better confirm that. */ 307 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) 308 panic("initarm: Failed to align the kernel page directory"); 309 310 /* 311 * Allocate a page for the system page mapped to V0x00000000 312 * This page will just contain the system vectors and can be 313 * shared by all processes. 314 */ 315 valloc_pages(systempage, 1); 316 317 pt_size = round_page(freemempos) - physical_start; 318 319 /* Allocate stacks for all modes */ 320 valloc_pages(irqstack, IRQ_STACK_SIZE); 321 valloc_pages(abtstack, ABT_STACK_SIZE); 322 valloc_pages(undstack, UND_STACK_SIZE); 323 valloc_pages(kernelstack, UPAGES); 324 325 #ifdef VERBOSE_INIT_ARM 326 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, 327 irqstack.pv_va); 328 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, 329 abtstack.pv_va); 330 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, 331 undstack.pv_va); 332 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, 333 kernelstack.pv_va); 334 #endif 335 336 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE); 337 338 /* 339 * XXX Actually, we only need virtual space and don't need 340 * XXX physical memory for sa110_cc_base and sa11x0_idle_mem. 341 */ 342 /* 343 * XXX totally stuffed hack to work round problems introduced 344 * in recent versions of the pmap code. Due to the calls used there 345 * we cannot allocate virtual memory during bootstrap. 346 */ 347 for (;;) { 348 alloc_pages(sa1_cc_base, 1); 349 if (!(sa1_cc_base & (CPU_SA110_CACHE_CLEAN_SIZE - 1))) 350 break; 351 } 352 alloc_pages(sa1_cache_clean_addr, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE - 1); 353 354 sa1_cache_clean_addr = sa1_cc_base; 355 sa1_cache_clean_size = CPU_SA110_CACHE_CLEAN_SIZE / 2; 356 357 alloc_pages(sa11x0_idle_mem, 1); 358 359 /* 360 * Ok, we have allocated physical pages for the primary kernel 361 * page tables. 362 */ 363 364 #ifdef VERBOSE_INIT_ARM 365 printf("Creating L1 page table\n"); 366 #endif 367 368 /* 369 * Now we start construction of the L1 page table. 370 * We start by mapping the L2 page tables into the L1. 371 * This means that we can replace L1 mappings later on if necessary. 372 */ 373 l1pagetable = kernel_l1pt.pv_pa; 374 375 /* Map the L2 pages tables in the L1 page table */ 376 pmap_link_l2pt(l1pagetable, 0x00000000, 377 &kernel_pt_table[KERNEL_PT_SYS]); 378 #define SAIPIO_BASE 0xd0000000 /* XXX XXX */ 379 pmap_link_l2pt(l1pagetable, SAIPIO_BASE, 380 &kernel_pt_table[KERNEL_PT_IO]); 381 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; ++loop) 382 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000, 383 &kernel_pt_table[KERNEL_PT_KERNEL + loop]); 384 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop) 385 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000, 386 &kernel_pt_table[KERNEL_PT_VMDATA + loop]); 387 388 /* update the top of the kernel VM */ 389 pmap_curmaxkvaddr = 390 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); 391 392 #ifdef VERBOSE_INIT_ARM 393 printf("Mapping kernel\n"); 394 #endif 395 396 /* Now we fill in the L2 pagetable for the kernel code/data */ 397 398 /* 399 * XXX there is no ELF header to find RO region. 400 * XXX What should we do? 401 */ 402 #if 0 403 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) { 404 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 405 physical_start, kernexec->a_text, 406 VM_PROT_READ, PTE_CACHE); 407 logical += pmap_map_chunk(l1pagetable, 408 KERNEL_TEXT_BASE + logical, physical_start + logical, 409 kerneldatasize - kernexec->a_text, 410 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 411 } else 412 #endif 413 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE, 414 KERNEL_TEXT_BASE - KERNEL_BASE + physical_start, 415 kerneldatasize, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 416 417 #ifdef VERBOSE_INIT_ARM 418 printf("Constructing L2 page tables\n"); 419 #endif 420 421 /* Map the stack pages */ 422 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa, 423 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 424 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa, 425 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 426 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa, 427 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 428 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa, 429 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 430 431 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, 432 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 433 434 /* Map page tables */ 435 pmap_map_chunk(l1pagetable, KERNEL_BASE, physical_start, pt_size, 436 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); 437 438 /* Map a page for entering idle mode */ 439 pmap_map_entry(l1pagetable, sa11x0_idle_mem, sa11x0_idle_mem, 440 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE); 441 442 /* Map the vector page. */ 443 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa, 444 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 445 446 /* Map the statically mapped devices. */ 447 pmap_devmap_bootstrap(l1pagetable, sa11x0_devmap); 448 449 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xe0000000, 450 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); 451 452 /* 453 * Now we have the real page tables in place so we can switch to them. 454 * Once this is done we will be running with the REAL kernel page 455 * tables. 456 */ 457 458 #ifdef VERBOSE_INIT_ARM 459 printf("done.\n"); 460 #endif 461 462 /* 463 * Pages were allocated during the secondary bootstrap for the 464 * stacks for different CPU modes. 465 * We must now set the r13 registers in the different CPU modes to 466 * point to these stacks. 467 * Since the ARM stacks use STMFD etc. we must set r13 to the top end 468 * of the stack memory. 469 */ 470 #ifdef VERBOSE_INIT_ARM 471 printf("init subsystems: stacks "); 472 #endif 473 474 set_stackptr(PSR_IRQ32_MODE, 475 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); 476 set_stackptr(PSR_ABT32_MODE, 477 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); 478 set_stackptr(PSR_UND32_MODE, 479 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); 480 #ifdef VERBOSE_INIT_ARM 481 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va, 482 kernelstack.pv_pa); 483 #endif /* VERBOSE_INIT_ARM */ 484 485 /* 486 * Well we should set a data abort handler. 487 * Once things get going this will change as we will need a proper 488 * handler. Until then we will use a handler that just panics but 489 * tells us why. 490 * Initialization of the vectors will just panic on a data abort. 491 * This just fills in a slightly better one. 492 */ 493 #ifdef VERBOSE_INIT_ARM 494 printf("vectors "); 495 #endif 496 data_abort_handler_address = (u_int)data_abort_handler; 497 prefetch_abort_handler_address = (u_int)prefetch_abort_handler; 498 undefined_handler_address = (u_int)undefinedinstruction_bounce; 499 #ifdef DEBUG 500 printf("%08x %08x %08x\n", data_abort_handler_address, 501 prefetch_abort_handler_address, undefined_handler_address); 502 #endif 503 504 /* Initialize the undefined instruction handlers */ 505 #ifdef VERBOSE_INIT_ARM 506 printf("undefined\n"); 507 #endif 508 undefined_init(); 509 510 /* Set the page table address. */ 511 #ifdef VERBOSE_INIT_ARM 512 printf("switching to new L1 page table @%#lx...\n", kernel_l1pt.pv_pa); 513 #endif 514 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); 515 cpu_setttb(kernel_l1pt.pv_pa, true); 516 cpu_tlb_flushID(); 517 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); 518 519 /* 520 * Moved from cpu_startup() as data_abort_handler() references 521 * this during uvm init. 522 */ 523 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); 524 525 #ifdef BOOT_DUMP 526 dumppages((char *)0xc0000000, 16 * PAGE_SIZE); 527 dumppages((char *)0xb0100000, 64); /* XXX */ 528 #endif 529 /* Enable MMU, I-cache, D-cache, write buffer. */ 530 cpufunc_control(0x337f, 0x107d); 531 532 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL); 533 534 consinit(); 535 536 #ifdef VERBOSE_INIT_ARM 537 printf("bootstrap done.\n"); 538 #endif 539 540 #ifdef VERBOSE_INIT_ARM 541 printf("freemempos=%08lx\n", freemempos); 542 printf("MMU enabled. control=%08x\n", cpu_get_control()); 543 #endif 544 545 /* Load memory into UVM. */ 546 uvm_md_init(); 547 for (loop = 0; loop < bootconfig.dramblocks; loop++) { 548 paddr_t dblk_start = (paddr_t)bootconfig.dram[loop].address; 549 paddr_t dblk_end = dblk_start 550 + (bootconfig.dram[loop].pages * PAGE_SIZE); 551 552 if (dblk_start < physical_freestart) 553 dblk_start = physical_freestart; 554 if (dblk_end > physical_freeend) 555 dblk_end = physical_freeend; 556 557 uvm_page_physload(atop(dblk_start), atop(dblk_end), 558 atop(dblk_start), atop(dblk_end), VM_FREELIST_DEFAULT); 559 } 560 561 /* Boot strap pmap telling it where managed kernel virtual memory is */ 562 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); 563 564 #ifdef BOOT_DUMP 565 dumppages((char *)kernel_l1pt.pv_va, 16); 566 #endif 567 568 #ifdef DDB 569 db_machine_init(); 570 #endif 571 #if NKSYMS || defined(DDB) || defined(MODULAR) 572 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize); 573 #endif 574 575 printf("kernsize=0x%x", kerneldatasize); 576 printf(" (including 0x%x symbols)\n", symbolsize); 577 578 #ifdef DDB 579 if (boothowto & RB_KDB) 580 Debugger(); 581 #endif /* DDB */ 582 583 /* We return the new stack pointer address */ 584 return kernelstack.pv_va + USPACE_SVC_STACK_TOP; 585 } 586 587 void 588 consinit(void) 589 { 590 static int consinit_called = 0; 591 592 if (consinit_called != 0) 593 return; 594 595 consinit_called = 1; 596 if (bootinfo->bi_cnuse == BI_CNUSE_SERIAL) { 597 cninit(); 598 } 599 } 600 601 #ifdef DEBUG_BEFOREMMU 602 cons_decl(sacom); 603 604 static void 605 fakecninit(void) 606 { 607 static struct consdev fakecntab = cons_init(sacom); 608 cn_tab = &fakecntab; 609 610 (*cn_tab->cn_init)(0); 611 cn_tab->cn_pri = CN_REMOTE; 612 } 613 #endif 614
Indexes created Tue Oct 07 21:09:53 GMT 2025