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>

diff --git a/arch/arm64/include/asm/pgtable-4level-hwdef.h b/arch/arm64/include/asm/pgtable-4level-hwdef.h
new file mode 100644 (file)
index 0000000..0ec84e2
--- /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 (file)
index 0000000..7ad8dd2
--- /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 */