[3/7] arm64: Macros to check/set/unset the contiguous bit

Commit Message

Jeremy Linton Oct. 7, 2015, 5 p.m. UTC

Add the supporting macros to check if the contiguous bit
is set, set the bit, or clear it in a PTE entry.

Signed-off-by: Jeremy Linton <[e-mail]>
---
 arch/arm64/include/asm/pgtable.h | 11 +++++++++++
 1 file changed, 11 insertions(+)

Patch

diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h
index 26b0666..cc19ec1 100644
--- a/arch/arm64/include/asm/pgtable.h
+++ b/arch/arm64/include/asm/pgtable.h
@@ -140,6 +140,7 @@  extern struct page *empty_zero_page;
 #define pte_special(pte)	(!!(pte_val(pte) & PTE_SPECIAL))
 #define pte_write(pte)		(!!(pte_val(pte) & PTE_WRITE))
 #define pte_exec(pte)		(!(pte_val(pte) & PTE_UXN))
+#define pte_cont(pte)		(!!(pte_val(pte) & PTE_CONT))
 
 #ifdef CONFIG_ARM64_HW_AFDBM
 #define pte_hw_dirty(pte)	(pte_write(pte) && !(pte_val(pte) & PTE_RDONLY))
@@ -202,6 +203,16 @@  static inline pte_t pte_mkspecial(pte_t pte)
 	return set_pte_bit(pte, __pgprot(PTE_SPECIAL));
 }
 
+static inline pte_t pte_mkcont(pte_t pte)
+{
+	return set_pte_bit(pte, __pgprot(PTE_CONT));
+}
+
+static inline pte_t pte_mknoncont(pte_t pte)
+{
+	return clear_pte_bit(pte, __pgprot(PTE_CONT));
+}
+
 static inline void set_pte(pte_t *ptep, pte_t pte)
 {
 	*ptep = pte;