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[PATCH] ARM: Add inline functions to find the pmd from virtual address 

Add pmd_off() and pmd_off_k() to obtain the pmd pointer for a
virtual address, and use them throughout the mm initialisation.

Signed-off-by: Russell King <rmk@arm.linux.org.uk>
This commit is contained in:
Russell King 2005-05-09 20:52:51 +01:00
parent 88d7bd8cb9
commit 155bb14482
1 changed files with 15 additions and 8 deletions
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23
arch/arm/mm/mm-armv.c
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@ -142,6 +142,16 @@ __setup("noalign", noalign_setup);
#define FIRST_KERNEL_PGD_NR (FIRST_USER_PGD_NR + USER_PTRS_PER_PGD)
static inline pmd_t *pmd_off(pgd_t *pgd, unsigned long virt)
{
return pmd_offset(pgd, virt);
}
static inline pmd_t *pmd_off_k(unsigned long virt)
{
return pmd_off(pgd_offset_k(virt), virt);
}
/*
* need to get a 16k page for level 1
*/
@ -220,7 +230,7 @@ void free_pgd_slow(pgd_t *pgd)
return;
/* pgd is always present and good */
pmd = (pmd_t *)pgd;
pmd = pmd_off(pgd, 0);
if (pmd_none(*pmd))
goto free;
if (pmd_bad(*pmd)) {
@ -246,9 +256,8 @@ free:
static inline void
alloc_init_section(unsigned long virt, unsigned long phys, int prot)
{
pmd_t *pmdp;
pmd_t *pmdp = pmd_off_k(virt);
pmdp = pmd_offset(pgd_offset_k(virt), virt);
if (virt & (1 << 20))
pmdp++;
@ -283,11 +292,9 @@ alloc_init_supersection(unsigned long virt, unsigned long phys, int prot)
static inline void
alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pgprot_t prot)
{
pmd_t *pmdp;
pmd_t *pmdp = pmd_off_k(virt);
pte_t *ptep;
pmdp = pmd_offset(pgd_offset_k(virt), virt);
if (pmd_none(*pmdp)) {
unsigned long pmdval;
ptep = alloc_bootmem_low_pages(2 * PTRS_PER_PTE *
@ -310,7 +317,7 @@ alloc_init_page(unsigned long virt, unsigned long phys, unsigned int prot_l1, pg
*/
static inline void clear_mapping(unsigned long virt)
{
pmd_clear(pmd_offset(pgd_offset_k(virt), virt));
pmd_clear(pmd_off_k(virt));
}
struct mem_types {
@ -578,7 +585,7 @@ void setup_mm_for_reboot(char mode)
PMD_TYPE_SECT;
if (cpu_arch <= CPU_ARCH_ARMv5)
pmdval |= PMD_BIT4;
pmd = pmd_offset(pgd + i, i << PGDIR_SHIFT);
pmd = pmd_off(pgd, i << PGDIR_SHIFT);
pmd[0] = __pmd(pmdval);
pmd[1] = __pmd(pmdval + (1 << (PGDIR_SHIFT - 1)));
flush_pmd_entry(pmd);