Changeset db3341e in mainline for arch/amd64/include/mm/page.h

Timestamp:

2005-09-01T14:28:00Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

623ba26c

Parents:

1dde3b61

Message:

Fixed typo in 'outb' instruction.
Paging basically working.

File:

• arch/amd64/include/mm/page.h (modified) (1 diff)

arch/amd64/include/mm/page.h

@@ -39 +39 @@
 
 #ifndef __ASM__
-# define KA2PA(x)       (((__address) (x)) + 0x80000000)
-# define PA2KA(x)       (((__address) (x)) - 0x80000000)
+# define KA2PA(x)      (((__address) (x)) + 0x80000000)
+# define PA2KA(x)      (((__address) (x)) - 0x80000000)
 #else
-# define KA2PA(x)       ((x) + 0x80000000)
-# define PA2KA(x)       ((x)) - 0x80000000)
+# define KA2PA(x)      ((x) + 0x80000000)
+//# define PA2KA(x)      ((x)) - 0x80000000)
 #endif
 
-#define PTL0_INDEX_ARCH(vaddr)          0
-#define PTL1_INDEX_ARCH(vaddr)          0
-#define PTL2_INDEX_ARCH(vaddr)          0
-#define PTL3_INDEX_ARCH(vaddr)          0
+#define PTL0_INDEX_ARCH(vaddr)  (((vaddr)>>39)&0x1ff)
+#define PTL1_INDEX_ARCH(vaddr)  (((vaddr)>>30)&0x1ff)
+#define PTL2_INDEX_ARCH(vaddr)  (((vaddr)>>21)&0x1ff)
+#define PTL3_INDEX_ARCH(vaddr)  (((vaddr)>>12)&0x1ff)
 
-#define GET_PTL0_ADDRESS_ARCH()         0
-#define SET_PTL0_ADDRESS_ARCH(ptl0)
+#define GET_PTL0_ADDRESS_ARCH()                 ((pte_t *) read_cr3())
+#define GET_PTL1_ADDRESS_ARCH(ptl0, i)          ((pte_t *) ((((__u64) ((pte_t *)(ptl0))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl0))[(i)].addr_32_51)<<32 )))
+#define GET_PTL2_ADDRESS_ARCH(ptl1, i)          ((pte_t *) ((((__u64) ((pte_t *)(ptl1))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl1))[(i)].addr_32_51)<<32 )))
+#define GET_PTL3_ADDRESS_ARCH(ptl2, i)          ((pte_t *) ((((__u64) ((pte_t *)(ptl2))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl2))[(i)].addr_32_51)<<32 )))
+#define GET_FRAME_ADDRESS_ARCH(ptl3, i)         ((__address *) ((((__u64) ((pte_t *)(ptl3))[(i)].addr_12_31)<<12) | (((__u64) ((pte_t *)(ptl3))[(i)].addr_32_51)<<32 )))
 
-#define GET_PTL1_ADDRESS_ARCH(ptl0, i)          ((pte_t *) 0)
-#define GET_PTL2_ADDRESS_ARCH(ptl1, i)          ((pte_t *) 0)
-#define GET_PTL3_ADDRESS_ARCH(ptl2, i)          ((pte_t *) 0)
-#define GET_FRAME_ADDRESS_ARCH(ptl3, i)         ((pte_t *) 0)
+#define SET_PTL0_ADDRESS_ARCH(ptl0)             (write_cr3((__address) (ptl0)))
+#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)       set_pt_addr((pte_t *)(ptl0), (index_t)(i), a)
+#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)       set_pt_addr((pte_t *)(ptl1), (index_t)(i), a)
+#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)       set_pt_addr((pte_t *)(ptl2), (index_t)(i), a)
+#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)      set_pt_addr((pte_t *)(ptl3), (index_t)(i), a)
 
-#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
-#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
-#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
-#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)
+#define GET_PTL1_FLAGS_ARCH(ptl0, i)            get_pt_flags((pte_t *)(ptl0), (index_t)(i))
+#define GET_PTL2_FLAGS_ARCH(ptl1, i)            get_pt_flags((pte_t *)(ptl1), (index_t)(i))
+#define GET_PTL3_FLAGS_ARCH(ptl2, i)            get_pt_flags((pte_t *)(ptl2), (index_t)(i))
+#define GET_FRAME_FLAGS_ARCH(ptl3, i)           get_pt_flags((pte_t *)(ptl3), (index_t)(i))
 
-#define GET_PTL1_FLAGS_ARCH(ptl0, i)            0
-#define GET_PTL2_FLAGS_ARCH(ptl1, i)            0
-#define GET_PTL3_FLAGS_ARCH(ptl2, i)            0
-#define GET_FRAME_FLAGS_ARCH(ptl3, i)           0
-
-#define SET_PTL1_FLAGS_ARCH(ptl0, 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)
+#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)         set_pt_flags((pte_t *)(ptl1), (index_t)(i), (x))
+#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)         set_pt_flags((pte_t *)(ptl2), (index_t)(i), (x))
+#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)        set_pt_flags((pte_t *)(ptl3), (index_t)(i), (x))
 
 #ifndef __ASM__
+
+typedef struct page_specifier pte_t;
+
+struct page_specifier {
+        unsigned present : 1;
+        unsigned writeable : 1;
+        unsigned uaccessible : 1;
+        unsigned page_write_through : 1;
+        unsigned page_cache_disable : 1;
+        unsigned accessed : 1;
+        unsigned dirty : 1;
+        unsigned unused: 1;
+        unsigned global : 1;
+        unsigned avl : 3;
+        unsigned addr_12_31 : 30;
+        unsigned addr_32_51 : 21;
+        unsigned no_execute : 1;
+} __attribute__ ((packed));
+
+static inline int get_pt_flags(pte_t *pt, index_t i)
+{
+        pte_t *p = &pt[i];
+        
+        return (
+                (!p->page_cache_disable)<<PAGE_CACHEABLE_SHIFT |
+                (!p->present)<<PAGE_PRESENT_SHIFT |
+                p->uaccessible<<PAGE_USER_SHIFT |
+                1<<PAGE_READ_SHIFT |
+                p->writeable<<PAGE_WRITE_SHIFT |
+                (!p->no_execute)<<PAGE_EXEC_SHIFT
+        );
+}
+
+static inline void set_pt_addr(pte_t *pt, index_t i, __address a)
+{
+        pte_t *p = &pt[i];
+
+        p->addr_12_31 = (a >> 12) & 0xfffff;
+        p->addr_32_51 = a >> 32;
+}
+
+static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
+{
+        pte_t *p = &pt[i];
+        
+        p->page_cache_disable = !(flags & PAGE_CACHEABLE);
+        p->present = !(flags & PAGE_NOT_PRESENT);
+        p->uaccessible = (flags & PAGE_USER) != 0;
+        p->writeable = (flags & PAGE_WRITE) != 0;
+        p->no_execute = (flags & PAGE_EXEC) == 0;
+}
+
 extern void page_arch_init(void);
 
-typedef __u64 pte_t;
 #endif