TX6 Release 2013-04-22

[karo-tx-uboot.git] / arch / arm / include / asm / system.h

diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
index ad524c5ef00a306828a4b4b5123a2fba648c88c0..1f92d27e0614248f5e1c3189e287fbea099dcc44 100644 (file)
--- a/arch/arm/include/asm/system.h
+++ b/arch/arm/include/asm/system.h
@@ -75,6 +75,37 @@ static inline void set_cr(unsigned int val)
        isb();
 }
 
+/* options available for data cache on each page */
+enum dcache_option {
+       DCACHE_OFF = 0x12,
+       DCACHE_WRITETHROUGH = 0x1a,
+       DCACHE_WRITEBACK = 0x1e,
+};
+
+/* Size of an MMU section */
+enum {
+       MMU_SECTION_SHIFT       = 20,
+       MMU_SECTION_SIZE        = 1 << MMU_SECTION_SHIFT,
+};
+
+/**
+ * Change the cache settings for a region.
+ *
+ * \param start                start address of memory region to change
+ * \param size         size of memory region to change
+ * \param option       dcache option to select
+ */
+void mmu_set_region_dcache_behaviour(u32 start, int size,
+                                    enum dcache_option option);
+
+/**
+ * Register an update to the page tables, and flush the TLB
+ *
+ * \param start                start address of update in page table
+ * \param stop         stop address of update in page table
+ */
+void mmu_page_table_flush(unsigned long start, unsigned long stop);
+
 #endif /* __ASSEMBLY__ */
 
 #define arch_align_stack(x) (x)