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Subject[PATCH 3/7] arm64: PTE/PMD contiguous bit definition
Date
Define the bit positions in the PTE and PMD for the
contiguous bit.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
arch/arm64/include/asm/pgtable-hwdef.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 4489cf6..80eeebf 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -55,6 +55,13 @@
#define SECTION_MASK (~(SECTION_SIZE-1))

/*
+ * Contiguous page definitions.
+ */
+#define CONT_RANGE (_AC(1, UL) << CONT_SHIFT)
+#define CONT_RANGE_MASK ((CONT_RANGE-1) << PAGE_SHIFT)
+#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_RANGE-1))
+
+/*
* Hardware page table definitions.
*
* Level 1 descriptor (PUD).
@@ -83,6 +90,7 @@
#define PMD_SECT_S (_AT(pmdval_t, 3) << 8)
#define PMD_SECT_AF (_AT(pmdval_t, 1) << 10)
#define PMD_SECT_NG (_AT(pmdval_t, 1) << 11)
+#define PMD_SECT_CONT (_AT(pmdval_t, 1) << 52)
#define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53)
#define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54)

@@ -105,6 +113,7 @@
#define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */
#define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */
#define PTE_DBM (_AT(pteval_t, 1) << 51) /* Dirty Bit Mgmt */
+#define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */
#define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */
#define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */

--
2.4.3



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