| 0,0 → 1,121 |
|---|
| /* |
| * Copyright (C) 2003-2004 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. |
| */ |
| |
| #ifndef __mips32_PAGE_H__ |
| #define __mips32_PAGE_H__ |
| |
| #define PAGE_SIZE FRAME_SIZE |
| |
| #ifndef __ASM__ |
| # define KA2PA(x) (((__address) (x)) - 0x80000000) |
| # define PA2KA(x) (((__address) (x)) + 0x80000000) |
| #else |
| # define KA2PA(x) ((x) - 0x80000000) |
| # define PA2KA(x) ((x) + 0x80000000) |
| #endif |
| |
| /* |
| * Implementation of generic 4-level page table interface. |
| * NOTE: this implementation is under construction |
| * |
| * Page table layout: |
| * - 32-bit virtual addresses |
| * - Offset is 14 bits => pages are 16K long |
| * - PTE's use the same format as CP0 EntryLo[01] registers => PTE is therefore 4 bytes long |
| * - PTL0 has 64 entries (6 bits) |
| * - PTL1 is not used |
| * - PTL2 is not used |
| * - PTL3 has 4096 entries (12 bits) |
| */ |
| |
| #define PTL0_INDEX_ARCH(vaddr) ((vaddr)>>26) |
| #define PTL1_INDEX_ARCH(vaddr) 0 |
| #define PTL2_INDEX_ARCH(vaddr) 0 |
| #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>14)&0xfff) |
| |
| #define GET_PTL0_ADDRESS_ARCH() (PTL0) |
| #define SET_PTL0_ADDRESS_ARCH(ptl0) (PTL0 = (pte_t *)(ptl0)) |
| |
| #define GET_PTL1_ADDRESS_ARCH(ptl0, i) (((pte_t *)(ptl0))[(i)].pfn<<14) |
| #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1) |
| #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2) |
| #define GET_FRAME_ADDRESS_ARCH(ptl3, i) (((pte_t *)(ptl3))[(i)].pfn<<14) |
| |
| #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].pfn = (a)>>14) |
| #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a) |
| #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a) |
| #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].pfn = (a)>>14) |
| |
| #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i)) |
| #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT |
| #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT |
| #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i)) |
| |
| #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x)) |
| #define SET_PTL2_FLAGS_ARCH(ptl1, i, x) |
| #define SET_PTL3_FLAGS_ARCH(ptl2, i, x) |
| #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x)) |
| |
| #ifndef __ASM__ |
| |
| #include <arch/mm/tlb.h> |
| #include <mm/page.h> |
| #include <arch/mm/frame.h> |
| #include <arch/types.h> |
| |
| static inline int get_pt_flags(pte_t *pt, index_t i) |
| { |
| pte_t *p = &pt[i]; |
| |
| return ( |
| ((p->c>PAGE_UNCACHED)<<PAGE_CACHEABLE_SHIFT) | |
| ((!p->v)<<PAGE_PRESENT_SHIFT) | |
| (1<<PAGE_USER_SHIFT) | |
| (1<<PAGE_READ_SHIFT) | |
| ((p->d)<<PAGE_WRITE_SHIFT) | |
| (1<<PAGE_EXEC_SHIFT) |
| ); |
| |
| } |
| |
| static inline void set_pt_flags(pte_t *pt, index_t i, int flags) |
| { |
| pte_t *p = &pt[i]; |
| |
| p->c = (flags & PAGE_CACHEABLE) != 0 ? PAGE_CACHEABLE_EXC_WRITE : PAGE_UNCACHED; |
| p->v = !(flags & PAGE_NOT_PRESENT); |
| p->d = (flags & PAGE_WRITE) != 0; |
| } |
| |
| extern void page_arch_init(void); |
| |
| extern pte_t *PTL0; |
| |
| #endif /* __ASM__ */ |
| |
| #endif |