| 0,0 → 1,78 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <arch/types.h> |
| #include <config.h> |
| #include <func.h> |
| #include <mm/frame.h> |
| #include <mm/page.h> |
| #include <arch/mm/page.h> |
| #include <arch/interrupt.h> |
| #include <arch/asm.h> |
| #include <synch/spinlock.h> |
| #include <debug.h> |
| #include <memstr.h> |
| #include <print.h> |
| |
| __address bootstrap_dba; |
| |
| void page_arch_init(void) |
| { |
| __address dba; |
| __u32 i; |
| |
| if (config.cpu_active == 1) { |
| dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
| memsetb(dba, PAGE_SIZE, 0); |
| |
| bootstrap_dba = dba; |
| |
| /* |
| * PA2KA(identity) mapping for all frames. |
| */ |
| for (i = 0; i < config.memory_size/PAGE_SIZE; i++) |
| page_mapping_insert(PA2KA(i * PAGE_SIZE), i * PAGE_SIZE, PAGE_CACHEABLE, KA2PA(dba)); |
| |
| trap_register(14, page_fault); |
| write_cr3(KA2PA(dba)); |
| } |
| else { |
| /* |
| * Application processors need to create their own view of the |
| * virtual address space. Because of that, each AP copies |
| * already-initialized paging information from the bootstrap |
| * processor and adjusts it to fulfill its needs. |
| */ |
| |
| dba = frame_alloc(FRAME_KA | FRAME_PANIC, 0); |
| memcpy((void *)dba, (void *)bootstrap_dba , PAGE_SIZE); |
| write_cr3(KA2PA(dba)); |
| } |
| |
| paging_on(); |
| } |