Subversion Repositories Kolibri OS

Rev

Rev 5270 | Go to most recent revision | Show entire file | Regard whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 5270 Rev 6082
Line 60... Line 60...
60 
				      unsigned long mask, unsigned int leftshift)
 60 
				      unsigned long mask, unsigned int leftshift)
61 
{
 61 
{
62 
	return ((value >> rightshift) & mask) << leftshift;
 62 
	return ((value >> rightshift) & mask) << leftshift;
63 
}
 63 
}
Line 64... Line -...
64 
 
 - 
 
65 
/*
 - 
 
66 
 * Bits _PAGE_BIT_PRESENT, _PAGE_BIT_FILE and _PAGE_BIT_PROTNONE are taken,
 - 
 
67 
 * split up the 29 bits of offset into this range.
 - 
 
68 
 */
 - 
 
69 
#define PTE_FILE_MAX_BITS	29
 - 
 
70 
#define PTE_FILE_SHIFT1		(_PAGE_BIT_PRESENT + 1)
 - 
 
71 
#define PTE_FILE_SHIFT2		(_PAGE_BIT_FILE + 1)
 - 
 
72 
#define PTE_FILE_SHIFT3		(_PAGE_BIT_PROTNONE + 1)
 - 
 
73 
#define PTE_FILE_BITS1		(PTE_FILE_SHIFT2 - PTE_FILE_SHIFT1 - 1)
 - 
 
74 
#define PTE_FILE_BITS2		(PTE_FILE_SHIFT3 - PTE_FILE_SHIFT2 - 1)
 - 
 
75 
 
 - 
 
76 
#define PTE_FILE_MASK1		((1U << PTE_FILE_BITS1) - 1)
 - 
 
77 
#define PTE_FILE_MASK2		((1U << PTE_FILE_BITS2) - 1)
 - 
 
78 
 
 - 
 
79 
#define PTE_FILE_LSHIFT2	(PTE_FILE_BITS1)
 - 
 
80 
#define PTE_FILE_LSHIFT3	(PTE_FILE_BITS1 + PTE_FILE_BITS2)
 - 
 
81 
 
 - 
 
82 
static __always_inline pgoff_t pte_to_pgoff(pte_t pte)
 - 
 
83 
{
 - 
 
84 
	return (pgoff_t)
 - 
 
85 
		(pte_bitop(pte.pte_low, PTE_FILE_SHIFT1, PTE_FILE_MASK1,  0)		    +
 - 
 
86 
		 pte_bitop(pte.pte_low, PTE_FILE_SHIFT2, PTE_FILE_MASK2,  PTE_FILE_LSHIFT2) +
 - 
 
87 
		 pte_bitop(pte.pte_low, PTE_FILE_SHIFT3,           -1UL,  PTE_FILE_LSHIFT3));
 - 
 
88 
}
 - 
 
89 
 
 - 
 
90 
static __always_inline pte_t pgoff_to_pte(pgoff_t off)
 - 
 
91 
{
 - 
 
92 
	return (pte_t){
 - 
 
93 
		.pte_low =
 - 
 
94 
			pte_bitop(off,                0, PTE_FILE_MASK1,  PTE_FILE_SHIFT1) +
 - 
 
95 
			pte_bitop(off, PTE_FILE_LSHIFT2, PTE_FILE_MASK2,  PTE_FILE_SHIFT2) +
 - 
 
96 
			pte_bitop(off, PTE_FILE_LSHIFT3,           -1UL,  PTE_FILE_SHIFT3) +
 - 
 
97 
			_PAGE_FILE,
 - 
 
98 
	};
 - 
 
99 
}
 - 
 
100 
 
 64 
 
101 
/* Encode and de-code a swap entry */
 65 
/* Encode and de-code a swap entry */
102 
#define SWP_TYPE_BITS (_PAGE_BIT_FILE - _PAGE_BIT_PRESENT - 1)
 66 
#define SWP_TYPE_BITS 5
Line 103... Line 67...
103 
#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
 67 
#define SWP_OFFSET_SHIFT (_PAGE_BIT_PROTNONE + 1)
Line 104... Line 68...
104 
 
 68