96a388de5d
Move the headers to include/asm-x86 and fixup the header install make rules Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
#ifndef _X86_64_PGALLOC_H
|
|
#define _X86_64_PGALLOC_H
|
|
|
|
#include <asm/pda.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/mm.h>
|
|
|
|
#define pmd_populate_kernel(mm, pmd, pte) \
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE | __pa(pte)))
|
|
#define pud_populate(mm, pud, pmd) \
|
|
set_pud(pud, __pud(_PAGE_TABLE | __pa(pmd)))
|
|
#define pgd_populate(mm, pgd, pud) \
|
|
set_pgd(pgd, __pgd(_PAGE_TABLE | __pa(pud)))
|
|
|
|
static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, struct page *pte)
|
|
{
|
|
set_pmd(pmd, __pmd(_PAGE_TABLE | (page_to_pfn(pte) << PAGE_SHIFT)));
|
|
}
|
|
|
|
static inline void pmd_free(pmd_t *pmd)
|
|
{
|
|
BUG_ON((unsigned long)pmd & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pmd);
|
|
}
|
|
|
|
static inline pmd_t *pmd_alloc_one (struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return (pmd_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline pud_t *pud_alloc_one(struct mm_struct *mm, unsigned long addr)
|
|
{
|
|
return (pud_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline void pud_free (pud_t *pud)
|
|
{
|
|
BUG_ON((unsigned long)pud & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pud);
|
|
}
|
|
|
|
static inline void pgd_list_add(pgd_t *pgd)
|
|
{
|
|
struct page *page = virt_to_page(pgd);
|
|
|
|
spin_lock(&pgd_lock);
|
|
list_add(&page->lru, &pgd_list);
|
|
spin_unlock(&pgd_lock);
|
|
}
|
|
|
|
static inline void pgd_list_del(pgd_t *pgd)
|
|
{
|
|
struct page *page = virt_to_page(pgd);
|
|
|
|
spin_lock(&pgd_lock);
|
|
list_del(&page->lru);
|
|
spin_unlock(&pgd_lock);
|
|
}
|
|
|
|
static inline pgd_t *pgd_alloc(struct mm_struct *mm)
|
|
{
|
|
unsigned boundary;
|
|
pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL|__GFP_REPEAT);
|
|
if (!pgd)
|
|
return NULL;
|
|
pgd_list_add(pgd);
|
|
/*
|
|
* Copy kernel pointers in from init.
|
|
* Could keep a freelist or slab cache of those because the kernel
|
|
* part never changes.
|
|
*/
|
|
boundary = pgd_index(__PAGE_OFFSET);
|
|
memset(pgd, 0, boundary * sizeof(pgd_t));
|
|
memcpy(pgd + boundary,
|
|
init_level4_pgt + boundary,
|
|
(PTRS_PER_PGD - boundary) * sizeof(pgd_t));
|
|
return pgd;
|
|
}
|
|
|
|
static inline void pgd_free(pgd_t *pgd)
|
|
{
|
|
BUG_ON((unsigned long)pgd & (PAGE_SIZE-1));
|
|
pgd_list_del(pgd);
|
|
free_page((unsigned long)pgd);
|
|
}
|
|
|
|
static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
return (pte_t *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
}
|
|
|
|
static inline struct page *pte_alloc_one(struct mm_struct *mm, unsigned long address)
|
|
{
|
|
void *p = (void *)get_zeroed_page(GFP_KERNEL|__GFP_REPEAT);
|
|
if (!p)
|
|
return NULL;
|
|
return virt_to_page(p);
|
|
}
|
|
|
|
/* Should really implement gc for free page table pages. This could be
|
|
done with a reference count in struct page. */
|
|
|
|
static inline void pte_free_kernel(pte_t *pte)
|
|
{
|
|
BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
|
|
free_page((unsigned long)pte);
|
|
}
|
|
|
|
static inline void pte_free(struct page *pte)
|
|
{
|
|
__free_page(pte);
|
|
}
|
|
|
|
#define __pte_free_tlb(tlb,pte) tlb_remove_page((tlb),(pte))
|
|
|
|
#define __pmd_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
|
|
#define __pud_free_tlb(tlb,x) tlb_remove_page((tlb),virt_to_page(x))
|
|
|
|
#endif /* _X86_64_PGALLOC_H */
|