diff mbox

[5/6] arm: import some Linux page table API

Message ID 1414684625-9445-6-git-send-email-drjones@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Andrew Jones Oct. 30, 2014, 3:57 p.m. UTC 
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 lib/arm/asm/page.h          | 22 +++++++++++++++
 lib/arm/asm/pgtable-hwdef.h | 65 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+)
 create mode 100644 lib/arm/asm/pgtable-hwdef.h
diff mbox

Patch

diff --git a/lib/arm/asm/page.h b/lib/arm/asm/page.h
index 4602d735b7886..6ff849a0c0e3b 100644
--- a/lib/arm/asm/page.h
+++ b/lib/arm/asm/page.h
@@ -18,6 +18,28 @@ 
 
 #include <asm/setup.h>
 
+typedef u64 pteval_t;
+typedef u64 pmdval_t;
+typedef u64 pgdval_t;
+typedef struct { pteval_t pte; } pte_t;
+typedef struct { pmdval_t pmd; } pmd_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 pgd_val(x)		((x).pgd)
+#define pgprot_val(x)		((x).pgprot)
+
+#define __pte(x)		((pte_t) { (x) } )
+#define __pmd(x)		((pmd_t) { (x) } )
+#define __pgd(x)		((pgd_t) { (x) } )
+#define __pgprot(x)		((pgprot_t) { (x) } )
+
+typedef struct { pgd_t pgd; } pud_t;
+#define pud_val(x)		(pgd_val((x).pgd))
+#define __pud(x)		((pud_t) { __pgd(x) } )
+
 #ifndef __virt_to_phys
 #define __phys_to_virt(x)	((unsigned long) (x))
 #define __virt_to_phys(x)	(x)
diff --git a/lib/arm/asm/pgtable-hwdef.h b/lib/arm/asm/pgtable-hwdef.h
new file mode 100644
index 0000000000000..a2564aaca05a3
--- /dev/null
+++ b/lib/arm/asm/pgtable-hwdef.h
@@ -0,0 +1,65 @@ 
+#ifndef _ASMARM_PGTABLE_HWDEF_H_
+#define _ASMARM_PGTABLE_HWDEF_H_
+/*
+ * From arch/arm/include/asm/pgtable-3level-hwdef.h
+ */
+
+/*
+ * Hardware page table definitions.
+ *
+ * + Level 1/2 descriptor
+ *   - common
+ */
+#define PMD_TYPE_MASK		(_AT(pmdval_t, 3) << 0)
+#define PMD_TYPE_FAULT		(_AT(pmdval_t, 0) << 0)
+#define PMD_TYPE_TABLE		(_AT(pmdval_t, 3) << 0)
+#define PMD_TYPE_SECT		(_AT(pmdval_t, 1) << 0)
+#define PMD_TABLE_BIT		(_AT(pmdval_t, 1) << 1)
+#define PMD_BIT4		(_AT(pmdval_t, 0))
+#define PMD_DOMAIN(x)		(_AT(pmdval_t, 0))
+#define PMD_APTABLE_SHIFT	(61)
+#define PMD_APTABLE		(_AT(pgdval_t, 3) << PGD_APTABLE_SHIFT)
+#define PMD_PXNTABLE		(_AT(pgdval_t, 1) << 59)
+
+/*
+ *   - section
+ */
+#define PMD_SECT_BUFFERABLE	(_AT(pmdval_t, 1) << 2)
+#define PMD_SECT_CACHEABLE	(_AT(pmdval_t, 1) << 3)
+#define PMD_SECT_USER		(_AT(pmdval_t, 1) << 6)		/* AP[1] */
+#define PMD_SECT_AP2		(_AT(pmdval_t, 1) << 7)		/* read only */
+#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_PXN		(_AT(pmdval_t, 1) << 53)
+#define PMD_SECT_XN		(_AT(pmdval_t, 1) << 54)
+#define PMD_SECT_AP_WRITE	(_AT(pmdval_t, 0))
+#define PMD_SECT_AP_READ	(_AT(pmdval_t, 0))
+#define PMD_SECT_AP1		(_AT(pmdval_t, 1) << 6)
+#define PMD_SECT_TEX(x)		(_AT(pmdval_t, 0))
+
+/*
+ * AttrIndx[2:0] encoding (mapping attributes defined in the MAIR* registers).
+ */
+#define PMD_SECT_UNCACHED	(_AT(pmdval_t, 0) << 2)	/* strongly ordered */
+#define PMD_SECT_BUFFERED	(_AT(pmdval_t, 1) << 2)	/* normal non-cacheable */
+#define PMD_SECT_WT		(_AT(pmdval_t, 2) << 2)	/* normal inner write-through */
+#define PMD_SECT_WB		(_AT(pmdval_t, 3) << 2)	/* normal inner write-back */
+#define PMD_SECT_WBWA		(_AT(pmdval_t, 7) << 2)	/* normal inner write-alloc */
+
+/*
+ * + Level 3 descriptor (PTE)
+ */
+#define PTE_TYPE_MASK		(_AT(pteval_t, 3) << 0)
+#define PTE_TYPE_FAULT		(_AT(pteval_t, 0) << 0)
+#define PTE_TYPE_PAGE		(_AT(pteval_t, 3) << 0)
+#define PTE_TABLE_BIT		(_AT(pteval_t, 1) << 1)
+#define PTE_BUFFERABLE		(_AT(pteval_t, 1) << 2)		/* AttrIndx[0] */
+#define PTE_CACHEABLE		(_AT(pteval_t, 1) << 3)		/* AttrIndx[1] */
+#define PTE_AP2			(_AT(pteval_t, 1) << 7)		/* AP[2] */
+#define PTE_EXT_SHARED		(_AT(pteval_t, 3) << 8)		/* SH[1:0], inner shareable */
+#define PTE_EXT_AF		(_AT(pteval_t, 1) << 10)	/* Access Flag */
+#define PTE_EXT_NG		(_AT(pteval_t, 1) << 11)	/* nG */
+#define PTE_EXT_XN		(_AT(pteval_t, 1) << 54)	/* XN */
+
+#endif /* _ASMARM_PGTABLE_HWDEF_H_ */