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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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 46 
 
- 
 
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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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 50 
 *
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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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 59 
 
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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 GET_PTL1_ADDRESS_ARCH(ptl0, i)      (((pte_t *) (ptl0))[(i)].pfn << 12)
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      (ptl1)
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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 *) (ptl3))[(i)].pfn << 12)
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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#define SET_PTL0_ADDRESS_ARCH(ptl0)
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 - 
 
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#define GET_PTL1_ADDRESS_ARCH(ptl0, i)      ((pte_t *) 0)
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#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)   (((pte_t *) (ptl0))[(i)].pfn = (a) >> 12)
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#define GET_PTL2_ADDRESS_ARCH(ptl1, i)      ((pte_t *) 0)
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#define GET_PTL3_ADDRESS_ARCH(ptl2, i)      ((pte_t *) 0)
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#define GET_FRAME_ADDRESS_ARCH(ptl3, i)     ((pte_t *) 0)
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#define SET_PTL1_ADDRESS_ARCH(ptl0, i, a)
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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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 85 
 
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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)
 87 
#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)
 89 
#define SET_FRAME_FLAGS_ARCH(ptl3, i, x)    set_pt_flags((pte_t *) (ptl3), (index_t) (i), (x))
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 90 
 
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#define PTE_VALID_ARCH(p)       1
 91 
#define PTE_VALID_ARCH(pte)         (*((__u32 *) (pte)) != 0)
80 
#define PTE_PRESENT_ARCH(p)     1
 92 
#define PTE_PRESENT_ARCH(pte)       ((pte)->p != 0)
81 
#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>
86 
#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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        (p->g << PAGE_GLOBAL_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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 117 
{
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 118 
    pte_t *p = &pt[i];
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 119 
   
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    p->p = !(flags & PAGE_NOT_PRESENT);
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    p->g = (flags & PAGE_GLOBAL) != 0;
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 122 
    p->valid = 1;
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 123 
}
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 124 
 
89 
extern void page_arch_init(void);
 125 
extern void page_arch_init(void);
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 126 
 
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#define PHT_BITS    16
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#define PHT_ORDER   4
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typedef struct {
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    unsigned v : 1;          /**< Valid */
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 132 
    unsigned vsid : 24;      /**< Virtual Segment ID */
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 133 
    unsigned h : 1;          /**< Primary/secondary hash */
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 134 
    unsigned api : 6;        /**< Abbreviated Page Index */
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 135 
    unsigned rpn : 20;       /**< Real Page Number */
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 136 
    unsigned reserved0 : 3;
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 137 
    unsigned r : 1;          /**< Reference */
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 138 
    unsigned c : 1;          /**< Change */
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    unsigned wimg : 4;       /**< Access control */
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 140 
    unsigned reserved1 : 1;
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 141 
    unsigned pp : 2;         /**< Page protection */
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 142 
} phte_t;
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 143 
 
- 
 
 144 
extern void pht_refill(bool data, istate_t *istate);
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 145 
extern void pht_init(void);
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 146 
 
91 
#endif /* __ASM__ */
 147 
#endif /* __ASM__ */
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 148 
 
93 
#endif /* KERNEL */
 149 
#endif /* KERNEL */
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 150 
 
95 
#endif
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#endif