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#else
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#else
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#   define KA2PA(x) ((x) - 0x80000000)
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#   define KA2PA(x) ((x) - 0x80000000)
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#   define PA2KA(x) ((x) + 0x80000000)
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#   define PA2KA(x) ((x) + 0x80000000)
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#endif
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#endif
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- 
 
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/*
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 * Implementation of generic 4-level page table interface,
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 * the hardware Page Hash Table is used as cache.
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 *
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 * Page table layout:
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 * - 32-bit virtual addressess
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 * - Offset is 12 bits => pages are 4K long
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 * - PTL0 has 1024 entries (10 bits)
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 * - PTL1 is not used
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 * - PTL2 is not used
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 * - PLT3 has 1024 entries (10 bits)
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 */
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#define PTL0_ENTRIES_ARCH       0
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#define PTL0_ENTRIES_ARCH   1024
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#define PTL1_ENTRIES_ARCH       0
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#define PTL1_ENTRIES_ARCH   0
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#define PTL2_ENTRIES_ARCH       0
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#define PTL2_ENTRIES_ARCH   0
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#define PTL3_ENTRIES_ARCH       0
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#define PTL3_ENTRIES_ARCH   1024
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#define PTL0_INDEX_ARCH(vaddr)      0
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#define PTL0_INDEX_ARCH(vaddr)  (((vaddr) >> 22) & 0x3ff)
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#define PTL1_INDEX_ARCH(vaddr)      0
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#define PTL1_INDEX_ARCH(vaddr)  0
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#define PTL2_INDEX_ARCH(vaddr)      0
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#define PTL2_INDEX_ARCH(vaddr)  0
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#define PTL3_INDEX_ARCH(vaddr)      0
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#define PTL3_INDEX_ARCH(vaddr)  (((vaddr) >> 12) & 0x3ff)
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) 0)
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#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      (((pte_t *) (ptl0))[(i)].pfn << 12)
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) 0)
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
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#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) 0)
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#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      (ptl2)
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#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((pte_t *) 0)
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#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     (((pte_t *) (ptl3))[(i)].pfn << 12)
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#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
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#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12)
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#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
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#define SET_PTL2_ADDRESS_ARCH(ptl1, i, a)
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#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
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#define SET_PTL3_ADDRESS_ARCH(ptl2, i, a)
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#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)
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#define SET_FRAME_ADDRESS_ARCH(ptl3, i, a)  (((pte_t *) (ptl3))[(i)].pfn = (a) >> 12)
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#define GET_PTL1_FLAGS_ARCH(ptl0, i)        0
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#define GET_PTL1_FLAGS_ARCH(ptl0, i)        get_pt_flags((pte_t *) (ptl0), (index_t) (i))
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#define GET_PTL2_FLAGS_ARCH(ptl1, i)        0
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#define GET_PTL2_FLAGS_ARCH(ptl1, i)        PAGE_PRESENT
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#define GET_PTL3_FLAGS_ARCH(ptl2, i)        0
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#define GET_PTL3_FLAGS_ARCH(ptl2, i)        PAGE_PRESENT
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#define GET_FRAME_FLAGS_ARCH(ptl3, i)       0
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#define GET_FRAME_FLAGS_ARCH(ptl3, i)       get_pt_flags((pte_t *) (ptl3), (index_t) (i))
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#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)
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#define SET_PTL1_FLAGS_ARCH(ptl0, i, x)     set_pt_flags((pte_t *) (ptl0), (index_t) (i), (x))
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#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
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#define SET_PTL2_FLAGS_ARCH(ptl1, i, x)
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#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
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#define SET_PTL3_FLAGS_ARCH(ptl2, i, x)
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#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)
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#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x))
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#define PTE_VALID_ARCH(p)       1
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#define PTE_VALID_ARCH(pte)         (*((__u32 *) (pte)) != 0)
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#define PTE_PRESENT_ARCH(p)     1
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#define PTE_PRESENT_ARCH(pte)       ((pte)->p != 0)
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#define PTE_GET_FRAME_ARCH(p)       0
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#define PTE_GET_FRAME_ARCH(pte)     ((pte)->pfn << 12)
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#ifndef __ASM__
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#ifndef __ASM__
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#include <mm/page.h>
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#include <mm/page.h>
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#include <arch/mm/frame.h>
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#include <arch/mm/frame.h>
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#include <arch/types.h>
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#include <arch/types.h>
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static inline int get_pt_flags(pte_t *pt, index_t i)
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{
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    pte_t *p = &pt[i];
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    return (
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        (1 << PAGE_CACHEABLE_SHIFT) |
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        ((!p->p) << PAGE_PRESENT_SHIFT) |
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        (1 << PAGE_USER_SHIFT) |
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        (1 << PAGE_READ_SHIFT) |
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        (1 << PAGE_WRITE_SHIFT) |
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        (1 << PAGE_EXEC_SHIFT)
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    );
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}
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static inline void set_pt_flags(pte_t *pt, index_t i, int flags)
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{
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    pte_t *p = &pt[i];
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    p->p = !(flags & PAGE_NOT_PRESENT);
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    p->valid = 1;
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 122 
}
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89 
extern void page_arch_init(void);
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extern void page_arch_init(void);
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 125 
 
91 
#endif /* __ASM__ */
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#endif /* __ASM__ */
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#endif /* KERNEL */
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#endif /* KERNEL */