1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mm/mm.h b/arch/arm/mm/mm.h
new file mode 100644
index 00000000..27f4a619
--- /dev/null
+++ b/arch/arm/mm/mm.h
@@ -0,0 +1,71 @@
+#ifdef CONFIG_MMU
+
+/* the upper-most page table pointer */
+extern pmd_t *top_pmd;
+
+/*
+ * 0xffff8000 to 0xffffffff is reserved for any ARM architecture
+ * specific hacks for copying pages efficiently, while 0xffff4000
+ * is reserved for VIPT aliasing flushing by generic code.
+ *
+ * Note that we don't allow VIPT aliasing caches with SMP.
+ */
+#define COPYPAGE_MINICACHE	0xffff8000
+#define COPYPAGE_V6_FROM	0xffff8000
+#define COPYPAGE_V6_TO		0xffffc000
+/* PFN alias flushing, for VIPT caches */
+#define FLUSH_ALIAS_START	0xffff4000
+
+static inline void set_top_pte(unsigned long va, pte_t pte)
+{
+	pte_t *ptep = pte_offset_kernel(top_pmd, va);
+	set_pte_ext(ptep, pte, 0);
+	local_flush_tlb_kernel_page(va);
+}
+
+static inline pte_t get_top_pte(unsigned long va)
+{
+	pte_t *ptep = pte_offset_kernel(top_pmd, va);
+	return *ptep;
+}
+
+static inline pmd_t *pmd_off_k(unsigned long virt)
+{
+	return pmd_offset(pud_offset(pgd_offset_k(virt), virt), virt);
+}
+
+struct mem_type {
+	pteval_t prot_pte;
+	pmdval_t prot_l1;
+	pmdval_t prot_sect;
+	unsigned int domain;
+};
+
+const struct mem_type *get_mem_type(unsigned int type);
+
+extern void __flush_dcache_page(struct address_space *mapping, struct page *page);
+
+/*
+ * ARM specific vm_struct->flags bits.
+ */
+
+/* (super)section-mapped I/O regions used by ioremap()/iounmap() */
+#define VM_ARM_SECTION_MAPPING	0x80000000
+
+/* permanent static mappings from iotable_init() */
+#define VM_ARM_STATIC_MAPPING	0x40000000
+
+/* mapping type (attributes) for permanent static mappings */
+#define VM_ARM_MTYPE(mt)		((mt) << 20)
+#define VM_ARM_MTYPE_MASK	(0x1f << 20)
+
+#endif
+
+#ifdef CONFIG_ZONE_DMA
+extern u32 arm_dma_limit;
+#else
+#define arm_dma_limit ((u32)~0)
+#endif
+
+void __init bootmem_init(void);
+void arm_mm_memblock_reserve(void);