00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019
00020
00021
00022
00023
00024
00025
00026
00027
00028
00035 #ifndef __ia32_PAGE_H__
00036 #define __ia32_PAGE_H__
00037
00038 #include <arch/mm/frame.h>
00039
00040 #define PAGE_WIDTH FRAME_WIDTH
00041 #define PAGE_SIZE FRAME_SIZE
00042
00043 #ifdef KERNEL
00044
00045 #ifndef __ASM__
00046 # define KA2PA(x) (((__address) (x)) - 0x80000000)
00047 # define PA2KA(x) (((__address) (x)) + 0x80000000)
00048 #else
00049 # define KA2PA(x) ((x) - 0x80000000)
00050 # define PA2KA(x) ((x) + 0x80000000)
00051 #endif
00052
00053
00054
00055
00056
00057 #define PTL0_ENTRIES_ARCH 1024
00058 #define PTL1_ENTRIES_ARCH 0
00059 #define PTL2_ENTRIES_ARCH 0
00060 #define PTL3_ENTRIES_ARCH 1024
00061
00062 #define PTL0_INDEX_ARCH(vaddr) (((vaddr)>>22)&0x3ff)
00063 #define PTL1_INDEX_ARCH(vaddr) 0
00064 #define PTL2_INDEX_ARCH(vaddr) 0
00065 #define PTL3_INDEX_ARCH(vaddr) (((vaddr)>>12)&0x3ff)
00066
00067 #define GET_PTL1_ADDRESS_ARCH(ptl0, i) ((pte_t *)((((pte_t *)(ptl0))[(i)].frame_address)<<12))
00068 #define GET_PTL2_ADDRESS_ARCH(ptl1, i) (ptl1)
00069 #define GET_PTL3_ADDRESS_ARCH(ptl2, i) (ptl2)
00070 #define GET_FRAME_ADDRESS_ARCH(ptl3, i) ((__address)((((pte_t *)(ptl3))[(i)].frame_address)<<12))
00071
00072 #define SET_PTL0_ADDRESS_ARCH(ptl0) (write_cr3((__address) (ptl0)))
00073 #define SET_PTL1_ADDRESS_ARCH(ptl0, i, a) (((pte_t *)(ptl0))[(i)].frame_address = (a)>>12)
00074 #define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
00075 #define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
00076 #define SET_FRAME_ADDRESS_ARCH(ptl3, i, a) (((pte_t *)(ptl3))[(i)].frame_address = (a)>>12)
00077
00078 #define GET_PTL1_FLAGS_ARCH(ptl0, i) get_pt_flags((pte_t *)(ptl0), (index_t)(i))
00079 #define GET_PTL2_FLAGS_ARCH(ptl1, i) PAGE_PRESENT
00080 #define GET_PTL3_FLAGS_ARCH(ptl2, i) PAGE_PRESENT
00081 #define GET_FRAME_FLAGS_ARCH(ptl3, i) get_pt_flags((pte_t *)(ptl3), (index_t)(i))
00082
00083 #define SET_PTL1_FLAGS_ARCH(ptl0, i, x) set_pt_flags((pte_t *)(ptl0), (index_t)(i), (x))
00084 #define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
00085 #define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
00086 #define SET_FRAME_FLAGS_ARCH(ptl3, i, x) set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
00087
00088 #define PTE_VALID_ARCH(p) (*((__u32 *) (p)) != 0)
00089 #define PTE_PRESENT_ARCH(p) ((p)->present != 0)
00090 #define PTE_GET_FRAME_ARCH(p) ((p)->frame_address<<FRAME_WIDTH)
00091 #define PTE_WRITABLE_ARCH(p) ((p)->writeable != 0)
00092 #define PTE_EXECUTABLE_ARCH(p) 1
00093
00094 #ifndef __ASM__
00095
00096 #include <mm/page.h>
00097 #include <arch/types.h>
00098 #include <arch/mm/frame.h>
00099 #include <typedefs.h>
00100
00101
00102
00104 #define PFERR_CODE_P (1<<0)
00105
00107 #define PFERR_CODE_RW (1<<1)
00108
00110 #define PFERR_CODE_US (1<<2)
00111
00113 #define PFERR_CODE_RSVD (1<<3)
00114
00116 struct page_specifier {
00117 unsigned present : 1;
00118 unsigned writeable : 1;
00119 unsigned uaccessible : 1;
00120 unsigned page_write_through : 1;
00121 unsigned page_cache_disable : 1;
00122 unsigned accessed : 1;
00123 unsigned dirty : 1;
00124 unsigned pat : 1;
00125 unsigned global : 1;
00126 unsigned soft_valid : 1;
00127 unsigned avl : 2;
00128 unsigned frame_address : 20;
00129 } __attribute__ ((packed));
00130
00131 static inline int get_pt_flags(pte_t *pt, index_t i)
00132 {
00133 pte_t *p = &pt[i];
00134
00135 return (
00136 (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT |
00137 (!p->present)<<PAGE_PRESENT_SHIFT |
00138 p->uaccessible<<PAGE_USER_SHIFT |
00139 1<<PAGE_READ_SHIFT |
00140 p->writeable<<PAGE_WRITE_SHIFT |
00141 1<<PAGE_EXEC_SHIFT |
00142 p->global<<PAGE_GLOBAL_SHIFT
00143 );
00144 }
00145
00146 static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
00147 {
00148 pte_t *p = &pt[i];
00149
00150 p->page_cache_disable = !(flags & PAGE_CACHEABLE);
00151 p->present = !(flags & PAGE_NOT_PRESENT);
00152 p->uaccessible = (flags & PAGE_USER) != 0;
00153 p->writeable = (flags & PAGE_WRITE) != 0;
00154 p->global = (flags & PAGE_GLOBAL) != 0;
00155
00156
00157
00158
00159 p->soft_valid = true;
00160 }
00161
00162 extern void page_arch_init(void);
00163 extern void page_fault(int n, istate_t *istate);
00164
00165 #endif
00166
00167 #endif
00168
00169 #endif
00170