| 0,0 → 1,121 |
|---|
| /* |
| * Copyright (C) 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. |
| */ |
| |
| /** @addtogroup genarchmm |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| /* |
| * This is the generic 4-level page table interface. |
| * Architectures that use hierarchical page tables |
| * are supposed to implement *_ARCH macros. |
| */ |
| |
| #ifdef CONFIG_PAGE_PT |
| |
| #ifndef __PAGE_PT_H__ |
| #define __PAGE_PT_H__ |
| |
| #include <arch/types.h> |
| #include <typedefs.h> |
| #include <mm/page.h> |
| |
| /* |
| * Number of entries in each level. |
| */ |
| #define PTL0_ENTRIES PTL0_ENTRIES_ARCH |
| #define PTL1_ENTRIES PTL1_ENTRIES_ARCH |
| #define PTL2_ENTRIES PTL2_ENTRIES_ARCH |
| #define PTL3_ENTRIES PTL3_ENTRIES_ARCH |
| |
| /* |
| * These macros process vaddr and extract those portions |
| * of it that function as indices to respective page tables. |
| */ |
| #define PTL0_INDEX(vaddr) PTL0_INDEX_ARCH(vaddr) |
| #define PTL1_INDEX(vaddr) PTL1_INDEX_ARCH(vaddr) |
| #define PTL2_INDEX(vaddr) PTL2_INDEX_ARCH(vaddr) |
| #define PTL3_INDEX(vaddr) PTL3_INDEX_ARCH(vaddr) |
| |
| #define SET_PTL0_ADDRESS(ptl0) SET_PTL0_ADDRESS_ARCH(ptl0) |
| |
| /* |
| * These macros traverse the 4-level tree of page tables, |
| * each descending by one level. |
| */ |
| #define GET_PTL1_ADDRESS(ptl0, i) GET_PTL1_ADDRESS_ARCH(ptl0, i) |
| #define GET_PTL2_ADDRESS(ptl1, i) GET_PTL2_ADDRESS_ARCH(ptl1, i) |
| #define GET_PTL3_ADDRESS(ptl2, i) GET_PTL3_ADDRESS_ARCH(ptl2, i) |
| #define GET_FRAME_ADDRESS(ptl3, i) GET_FRAME_ADDRESS_ARCH(ptl3, i) |
| |
| /* |
| * These macros are provided to change shape of the 4-level |
| * tree of page tables on respective level. |
| */ |
| #define SET_PTL1_ADDRESS(ptl0, i, a) SET_PTL1_ADDRESS_ARCH(ptl0, i, a) |
| #define SET_PTL2_ADDRESS(ptl1, i, a) SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
| #define SET_PTL3_ADDRESS(ptl2, i, a) SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
| #define SET_FRAME_ADDRESS(ptl3, i, a) SET_FRAME_ADDRESS_ARCH(ptl3, i, a) |
| |
| /* |
| * These macros are provided to query various flags within the page tables. |
| */ |
| #define GET_PTL1_FLAGS(ptl0, i) GET_PTL1_FLAGS_ARCH(ptl0, i) |
| #define GET_PTL2_FLAGS(ptl1, i) GET_PTL2_FLAGS_ARCH(ptl1, i) |
| #define GET_PTL3_FLAGS(ptl2, i) GET_PTL3_FLAGS_ARCH(ptl2, i) |
| #define GET_FRAME_FLAGS(ptl3, i) GET_FRAME_FLAGS_ARCH(ptl3, i) |
| |
| /* |
| * These macros are provided to set/clear various flags within the page tables. |
| */ |
| #define SET_PTL1_FLAGS(ptl0, i, x) SET_PTL1_FLAGS_ARCH(ptl0, i, x) |
| #define SET_PTL2_FLAGS(ptl1, i, x) SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
| #define SET_PTL3_FLAGS(ptl2, i, x) SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
| #define SET_FRAME_FLAGS(ptl3, i, x) SET_FRAME_FLAGS_ARCH(ptl3, i, x) |
| |
| #define PTE_VALID(p) PTE_VALID_ARCH((p)) |
| #define PTE_PRESENT(p) PTE_PRESENT_ARCH((p)) |
| #define PTE_GET_FRAME(p) PTE_GET_FRAME_ARCH((p)) |
| #define PTE_READABLE(p) 1 |
| #define PTE_WRITABLE(p) PTE_WRITABLE_ARCH((p)) |
| #define PTE_EXECUTABLE(p) PTE_EXECUTABLE_ARCH((p)) |
| |
| extern page_mapping_operations_t pt_mapping_operations; |
| |
| extern void page_mapping_insert_pt(as_t *as, uintptr_t page, uintptr_t frame, int flags); |
| extern pte_t *page_mapping_find_pt(as_t *as, uintptr_t page); |
| |
| #endif |
| |
| #endif |
| |
| /** @} |
| */ |
| |