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-rw-r--r--include/asm-generic/pgtable.h15
-rw-r--r--lib/ioremap.c16
2 files changed, 31 insertions, 0 deletions
diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 1f9f5da6828f..9fb7dc7ca7f4 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -6,6 +6,7 @@
#include <linux/mm_types.h>
#include <linux/bug.h>
+#include <linux/errno.h>
#if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \
CONFIG_PGTABLE_LEVELS
@@ -696,6 +697,20 @@ static inline int pmd_protnone(pmd_t pmd)
#endif /* CONFIG_MMU */
+#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
+int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot);
+int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot);
+#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */
+static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
+{
+ return 0;
+}
+static inline int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot)
+{
+ return 0;
+}
+#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
+
#endif /* !__ASSEMBLY__ */
#ifndef io_remap_pfn_range
diff --git a/lib/ioremap.c b/lib/ioremap.c
index 2008652c9a1f..be249062ba6e 100644
--- a/lib/ioremap.c
+++ b/lib/ioremap.c
@@ -80,6 +80,14 @@ static inline int ioremap_pmd_range(pud_t *pud, unsigned long addr,
return -ENOMEM;
do {
next = pmd_addr_end(addr, end);
+
+ if (ioremap_pmd_enabled() &&
+ ((next - addr) == PMD_SIZE) &&
+ IS_ALIGNED(phys_addr + addr, PMD_SIZE)) {
+ if (pmd_set_huge(pmd, phys_addr + addr, prot))
+ continue;
+ }
+
if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, prot))
return -ENOMEM;
} while (pmd++, addr = next, addr != end);
@@ -98,6 +106,14 @@ static inline int ioremap_pud_range(pgd_t *pgd, unsigned long addr,
return -ENOMEM;
do {
next = pud_addr_end(addr, end);
+
+ if (ioremap_pud_enabled() &&
+ ((next - addr) == PUD_SIZE) &&
+ IS_ALIGNED(phys_addr + addr, PUD_SIZE)) {
+ if (pud_set_huge(pud, phys_addr + addr, prot))
+ continue;
+ }
+
if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, prot))
return -ENOMEM;
} while (pud++, addr = next, addr != end);