File diff 5fc7f2080582 → 95e39e5412bd
BLD/build/HEADERS/92-vmkdrivers-asm-x64/vmkernel64/release/asm/pgalloc.h
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new file 100644
 
#ifndef _X86_64_PGALLOC_H
 
#define _X86_64_PGALLOC_H
 

	
 
#include <asm/fixmap.h>
 
#include <asm/pda.h>
 
#include <linux/threads.h>
 
#include <linux/mm.h>
 

	
 
#define arch_add_exec_range(mm, limit) \
 
		do { (void)(mm), (void)(limit); } while (0)
 
#define arch_flush_exec_range(mm) \
 
		do { (void)(mm); } while (0)
 
#define arch_remove_exec_range(mm, limit) \
 
		do { (void)(mm), (void)(limit); } while (0)
 

	
 
#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 pmd_t *get_pmd(void)
 
{
 
	return (pmd_t *)get_zeroed_page(GFP_KERNEL);
 
}
 

	
 
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);
 
	page->index = (pgoff_t)pgd_list;
 
	if (pgd_list)
 
		pgd_list->private = (unsigned long)&page->index;
 
	pgd_list = page;
 
	page->private = (unsigned long)&pgd_list;
 
	spin_unlock(&pgd_lock);
 
}
 

	
 
static inline void pgd_list_del(pgd_t *pgd)
 
{
 
	struct page *next, **pprev, *page = virt_to_page(pgd);
 

	
 
	spin_lock(&pgd_lock);
 
	next = (struct page *)page->index;
 
	pprev = (struct page **)page->private;
 
	*pprev = next;
 
	if (next)
 
		next->private = (unsigned long)pprev;
 
	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 */