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-rw-r--r--arch/sh/mm/init.c52
1 files changed, 38 insertions, 14 deletions
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 46f84de62469..82d46096e531 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -47,7 +47,6 @@ static pte_t *__get_pte_phys(unsigned long addr)
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
pgd = pgd_offset_k(addr);
if (pgd_none(*pgd)) {
@@ -67,8 +66,7 @@ static pte_t *__get_pte_phys(unsigned long addr)
return NULL;
}
- pte = pte_offset_kernel(pmd, addr);
- return pte;
+ return pte_offset_kernel(pmd, addr);
}
static void set_pte_phys(unsigned long addr, unsigned long phys, pgprot_t prot)
@@ -125,13 +123,45 @@ void __clear_fixmap(enum fixed_addresses idx, pgprot_t prot)
clear_pte_phys(address, prot);
}
+static pmd_t * __init one_md_table_init(pud_t *pud)
+{
+ if (pud_none(*pud)) {
+ pmd_t *pmd;
+
+ pmd = alloc_bootmem_pages(PAGE_SIZE);
+ pud_populate(&init_mm, pud, pmd);
+ BUG_ON(pmd != pmd_offset(pud, 0));
+ }
+
+ return pmd_offset(pud, 0);
+}
+
+static pte_t * __init one_page_table_init(pmd_t *pmd)
+{
+ if (pmd_none(*pmd)) {
+ pte_t *pte;
+
+ pte = alloc_bootmem_pages(PAGE_SIZE);
+ pmd_populate_kernel(&init_mm, pmd, pte);
+ BUG_ON(pte != pte_offset_kernel(pmd, 0));
+ }
+
+ return pte_offset_kernel(pmd, 0);
+}
+
+static pte_t * __init page_table_kmap_check(pte_t *pte, pmd_t *pmd,
+ unsigned long vaddr, pte_t *lastpte)
+{
+ return pte;
+}
+
void __init page_table_range_init(unsigned long start, unsigned long end,
pgd_t *pgd_base)
{
pgd_t *pgd;
pud_t *pud;
pmd_t *pmd;
- pte_t *pte;
+ pte_t *pte = NULL;
int i, j, k;
unsigned long vaddr;
@@ -144,19 +174,13 @@ void __init page_table_range_init(unsigned long start, unsigned long end,
for ( ; (i < PTRS_PER_PGD) && (vaddr != end); pgd++, i++) {
pud = (pud_t *)pgd;
for ( ; (j < PTRS_PER_PUD) && (vaddr != end); pud++, j++) {
-#ifdef __PAGETABLE_PMD_FOLDED
- pmd = (pmd_t *)pud;
-#else
- pmd = (pmd_t *)alloc_bootmem_low_pages(PAGE_SIZE);
- pud_populate(&init_mm, pud, pmd);
+ pmd = one_md_table_init(pud);
+#ifndef __PAGETABLE_PMD_FOLDED
pmd += k;
#endif
for (; (k < PTRS_PER_PMD) && (vaddr != end); pmd++, k++) {
- if (pmd_none(*pmd)) {
- pte = (pte_t *) alloc_bootmem_low_pages(PAGE_SIZE);
- pmd_populate_kernel(&init_mm, pmd, pte);
- BUG_ON(pte != pte_offset_kernel(pmd, 0));
- }
+ pte = page_table_kmap_check(one_page_table_init(pmd),
+ pmd, vaddr, pte);
vaddr += PMD_SIZE;
}
k = 0;