Commit 95a41bc4 authored by Ivan Kokshaysky's avatar Ivan Kokshaysky Committed by Richard Henderson

[PATCH] alpha: file offset in pte

It's possible to squeeze more bits out of lower half of pte,
but 32 seem to be a plenty...

Ivan.
parent f2b5f0fd
......@@ -68,6 +68,7 @@
/* .. and these are ours ... */
#define _PAGE_DIRTY 0x20000
#define _PAGE_ACCESSED 0x40000
#define _PAGE_FILE 0x80000 /* pagecache or swap? */
/*
* NOTE! The "accessed" bit isn't necessarily exact: it can be kept exactly
......@@ -254,6 +255,7 @@ extern inline int pte_write(pte_t pte) { return !(pte_val(pte) & _PAGE_FOW); }
extern inline int pte_exec(pte_t pte) { return !(pte_val(pte) & _PAGE_FOE); }
extern inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
extern inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
extern inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
extern inline pte_t pte_wrprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOW; return pte; }
extern inline pte_t pte_rdprotect(pte_t pte) { pte_val(pte) |= _PAGE_FOR; return pte; }
......@@ -311,11 +313,16 @@ extern inline void update_mmu_cache(struct vm_area_struct * vma,
extern inline pte_t mk_swap_pte(unsigned long type, unsigned long offset)
{ pte_t pte; pte_val(pte) = (type << 32) | (offset << 40); return pte; }
#define __swp_type(x) (((x).val >> 32) & 0xff)
#define __swp_offset(x) ((x).val >> 40)
#define __swp_entry(type, offset) ((swp_entry_t) { pte_val(mk_swap_pte((type),(offset))) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define __swp_type(x) (((x).val >> 32) & 0xff)
#define __swp_offset(x) ((x).val >> 40)
#define __swp_entry(type, off) ((swp_entry_t) { pte_val(mk_swap_pte((type), (off))) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define pte_to_pgoff(pte) (pte_val(pte) >> 32)
#define pgoff_to_pte(off) ((pte_t) { ((off) << 32) | _PAGE_FILE })
#define PTE_FILE_MAX_BITS 32
#ifndef CONFIG_DISCONTIGMEM
#define kern_addr_valid(addr) (1)
......
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