| 0,0 → 1,110 |
|---|
| /* |
| * Copyright (C) 2001-2006 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. |
| */ |
| |
| /* |
| * Virtual Address Translation subsystem. |
| */ |
| |
| #include <mm/page.h> |
| #include <arch/mm/page.h> |
| #include <arch/mm/asid.h> |
| #include <mm/as.h> |
| #include <mm/frame.h> |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <arch/asm.h> |
| #include <memstr.h> |
| #include <debug.h> |
| #include <arch.h> |
| |
| /** Virtual operations for page subsystem. */ |
| page_operations_t *page_operations = NULL; |
| |
| void page_init(void) |
| { |
| page_arch_init(); |
| page_mapping_insert(AS_KERNEL, 0x0, 0x0, PAGE_NOT_PRESENT, 0); |
| } |
| |
| /** Map memory structure |
| * |
| * Identity-map memory structure |
| * considering possible crossings |
| * of page boundaries. |
| * |
| * @param s Address of the structure. |
| * @param size Size of the structure. |
| */ |
| void map_structure(__address s, size_t size) |
| { |
| int i, cnt, length; |
| |
| length = size + (s - (s & ~(PAGE_SIZE-1))); |
| cnt = length/PAGE_SIZE + (length%PAGE_SIZE>0); |
| |
| for (i = 0; i < cnt; i++) |
| page_mapping_insert(AS_KERNEL, s + i*PAGE_SIZE, s + i*PAGE_SIZE, PAGE_NOT_CACHEABLE, 0); |
| |
| } |
| |
| /** Map page to frame |
| * |
| * Map virtual address 'page' to physical address 'frame' |
| * using 'flags'. Allocate and setup any missing page tables. |
| * |
| * @param as Address space to wich page belongs. Must be locked prior the call. |
| * @param page Virtual address of the page to be mapped. |
| * @param frame Physical address of memory frame to which the mapping is done. |
| * @param flags Flags to be used for mapping. |
| * @param root Explicit PTL0 address. |
| */ |
| void page_mapping_insert(as_t *as, __address page, __address frame, int flags, __address root) |
| { |
| ASSERT(page_operations); |
| ASSERT(page_operations->mapping_insert); |
| |
| page_operations->mapping_insert(as, page, frame, flags, root); |
| } |
| |
| /** Find mapping for virtual page |
| * |
| * Find mapping for virtual page. |
| * |
| * @param as Address space to wich page belongs must be locked prior the call. |
| * @param page Virtual page. |
| * @param root PTL0 address if non-zero. |
| * |
| * @return NULL if there is no such mapping; requested mapping otherwise. |
| */ |
| pte_t *page_mapping_find(as_t *as, __address page, __address root) |
| { |
| ASSERT(page_operations); |
| ASSERT(page_operations->mapping_find); |
| |
| return page_operations->mapping_find(as, page, root); |
| } |