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authorJungseok Lee <jays.lee@samsung.com>2014-05-12 10:40:47 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2014-07-23 15:27:34 +0100
commit57e0139041a978c0cfa4d2366c96ea3418e7d553 (patch)
tree6fcfa86718f90916711df2ea837af99fed06b71e
parent4edae01e89100821d167076dec6ecdd40318b7c1 (diff)
downloadlinux-57e0139041a978c0cfa4d2366c96ea3418e7d553.tar.gz
arm64: Add 4 levels of page tables definition with 4KB pages
This patch adds hardware definition and types for 4 levels of translation tables with 4KB pages. Signed-off-by: Jungseok Lee <jays.lee@samsung.com> Reviewed-by: Sungjinn Chung <sungjinn.chung@samsung.com> Acked-by: Kukjin Kim <kgene.kim@samsung.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Tested-by: Jungseok Lee <jungseoklee85@gmail.com>
-rw-r--r--arch/arm64/include/asm/pgtable-4level-hwdef.h50
-rw-r--r--arch/arm64/include/asm/pgtable-4level-types.h71
2 files changed, 121 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable-4level-hwdef.h b/arch/arm64/include/asm/pgtable-4level-hwdef.h
new file mode 100644
index 000000000000..0ec84e2274a3
--- /dev/null
+++ b/arch/arm64/include/asm/pgtable-4level-hwdef.h
@@ -0,0 +1,50 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_PGTABLE_4LEVEL_HWDEF_H
+#define __ASM_PGTABLE_4LEVEL_HWDEF_H
+
+#define PTRS_PER_PTE 512
+#define PTRS_PER_PMD 512
+#define PTRS_PER_PUD 512
+#define PTRS_PER_PGD 512
+
+/*
+ * PGDIR_SHIFT determines the size a top-level page table entry can map.
+ */
+#define PGDIR_SHIFT 39
+#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
+#define PGDIR_MASK (~(PGDIR_SIZE-1))
+
+/*
+ * PUD_SHIFT determines the size the second level page table entry can map.
+ */
+#define PUD_SHIFT 30
+#define PUD_SIZE (_AC(1, UL) << PUD_SHIFT)
+#define PUD_MASK (~(PUD_SIZE-1))
+
+/*
+ * PMD_SHIFT determines the size the third level page table entry can map.
+ */
+#define PMD_SHIFT 21
+#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
+#define PMD_MASK (~(PMD_SIZE-1))
+
+/*
+ * section address mask and size definitions.
+ */
+#define SECTION_SHIFT 21
+#define SECTION_SIZE (_AC(1, UL) << SECTION_SHIFT)
+#define SECTION_MASK (~(SECTION_SIZE-1))
+
+#endif
diff --git a/arch/arm64/include/asm/pgtable-4level-types.h b/arch/arm64/include/asm/pgtable-4level-types.h
new file mode 100644
index 000000000000..7ad8dd257ea1
--- /dev/null
+++ b/arch/arm64/include/asm/pgtable-4level-types.h
@@ -0,0 +1,71 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef __ASM_PGTABLE_4LEVEL_TYPES_H
+#define __ASM_PGTABLE_4LEVEL_TYPES_H
+
+#include <asm/types.h>
+
+typedef u64 pteval_t;
+typedef u64 pmdval_t;
+typedef u64 pudval_t;
+typedef u64 pgdval_t;
+
+#undef STRICT_MM_TYPECHECKS
+
+#ifdef STRICT_MM_TYPECHECKS
+
+/*
+ * These are used to make use of C type-checking..
+ */
+typedef struct { pteval_t pte; } pte_t;
+typedef struct { pmdval_t pmd; } pmd_t;
+typedef struct { pudval_t pud; } pud_t;
+typedef struct { pgdval_t pgd; } pgd_t;
+typedef struct { pteval_t pgprot; } pgprot_t;
+
+#define pte_val(x) ((x).pte)
+#define pmd_val(x) ((x).pmd)
+#define pud_val(x) ((x).pud)
+#define pgd_val(x) ((x).pgd)
+#define pgprot_val(x) ((x).pgprot)
+
+#define __pte(x) ((pte_t) { (x) } )
+#define __pmd(x) ((pmd_t) { (x) } )
+#define __pud(x) ((pud_t) { (x) } )
+#define __pgd(x) ((pgd_t) { (x) } )
+#define __pgprot(x) ((pgprot_t) { (x) } )
+
+#else /* !STRICT_MM_TYPECHECKS */
+
+typedef pteval_t pte_t;
+typedef pmdval_t pmd_t;
+typedef pudval_t pud_t;
+typedef pgdval_t pgd_t;
+typedef pteval_t pgprot_t;
+
+#define pte_val(x) (x)
+#define pmd_val(x) (x)
+#define pud_val(x) (x)
+#define pgd_val(x) (x)
+#define pgprot_val(x) (x)
+
+#define __pte(x) (x)
+#define __pmd(x) (x)
+#define __pud(x) (x)
+#define __pgd(x) (x)
+#define __pgprot(x) (x)
+
+#endif /* STRICT_MM_TYPECHECKS */
+
+#endif /* __ASM_PGTABLE_4LEVEL_TYPES_H */