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OpenCloudOS-Kernel
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x86: implement set_pte_vaddr 

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge 2008-06-17 11:41:59 -07:00 committed by Ingo Molnar
parent 7c7e6e07e2
commit d494a96125
4 changed files with 11 additions and 9 deletions
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9
arch/x86/mm/init_64.c
View File

@ -135,15 +135,15 @@ static __init void *spp_getpage(void)
return ptr;
}
static void
set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
void
set_pte_vaddr(unsigned long vaddr, pte_t new_pte)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
pte_t *pte, new_pte;
pte_t *pte;
pr_debug("set_pte_phys %lx to %lx\n", vaddr, phys);
pr_debug("set_pte_vaddr %lx to %lx\n", vaddr, native_pte_val(new_pte));
pgd = pgd_offset_k(vaddr);
if (pgd_none(*pgd)) {
@ -170,7 +170,6 @@ set_pte_phys(unsigned long vaddr, unsigned long phys, pgprot_t prot)
return;
}
}
new_pte = pfn_pte(phys >> PAGE_SHIFT, prot);
pte = pte_offset_kernel(pmd, vaddr);
if (!pte_none(*pte) && pte_val(new_pte) &&

2
arch/x86/mm/pgtable.c
View File

@ -285,6 +285,6 @@ void __set_fixmap (enum fixed_addresses idx, unsigned long phys, pgprot_t flags)
BUG();
return;
}
set_pte_pfn(address, phys >> PAGE_SHIFT, flags);
set_pte_vaddr(address, pfn_pte(phys >> PAGE_SHIFT, flags));
fixmaps_set++;
}

6
arch/x86/mm/pgtable_32.c
View File

@ -71,7 +71,7 @@ void show_mem(void)
* Associate a virtual page frame with a given physical page frame
* and protection flags for that frame.
*/
static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
void set_pte_vaddr(unsigned long vaddr, pte_t pteval)
{
pgd_t *pgd;
pud_t *pud;
@ -94,8 +94,8 @@ static void set_pte_pfn(unsigned long vaddr, unsigned long pfn, pgprot_t flags)
return;
}
pte = pte_offset_kernel(pmd, vaddr);
if (pgprot_val(flags))
set_pte_present(&init_mm, vaddr, pte, pfn_pte(pfn, flags));
if (pte_val(pteval))
set_pte_present(&init_mm, vaddr, pte, pteval);
else
pte_clear(&init_mm, vaddr, pte);

3
include/asm-x86/pgtable.h
View File

@ -318,6 +318,9 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn,
unsigned long size, pgprot_t *vma_prot);
#endif
/* Install a pte for a particular vaddr in kernel space. */
void set_pte_vaddr(unsigned long vaddr, pte_t pte);
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else /* !CONFIG_PARAVIRT */