powerpc/mm: Introduce MMU features

[deliverable/linux.git] / arch / powerpc / include / asm / mmu.h

diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h
index 4c0e1b4f975c369e2655b29c8bf660d9b05ac8a6..dc8c0aef5e6c525b40370017e9bad74be6917186 100644 (file)
--- a/arch/powerpc/include/asm/mmu.h
+++ b/arch/powerpc/include/asm/mmu.h
@@ -2,6 +2,47 @@
 #define _ASM_POWERPC_MMU_H_
 #ifdef __KERNEL__
 
+#include <asm/asm-compat.h>
+#include <asm/feature-fixups.h>
+
+/*
+ * MMU features bit definitions
+ */
+
+/*
+ * First half is MMU families
+ */
+#define MMU_FTR_HPTE_TABLE             ASM_CONST(0x00000001)
+#define MMU_FTR_TYPE_8xx               ASM_CONST(0x00000002)
+#define MMU_FTR_TYPE_40x               ASM_CONST(0x00000004)
+#define MMU_FTR_TYPE_44x               ASM_CONST(0x00000008)
+#define MMU_FTR_TYPE_FSL_E             ASM_CONST(0x00000010)
+
+/*
+ * This is individual features
+ */
+
+/* Enable use of high BAT registers */
+#define MMU_FTR_USE_HIGH_BATS          ASM_CONST(0x00010000)
+
+/* Enable >32-bit physical addresses on 32-bit processor, only used
+ * by CONFIG_6xx currently as BookE supports that from day 1
+ */
+#define MMU_FTR_BIG_PHYS               ASM_CONST(0x00020000)
+
+#ifndef __ASSEMBLY__
+#include <asm/cputable.h>
+
+static inline int mmu_has_feature(unsigned long feature)
+{
+       return (cur_cpu_spec->mmu_features & feature);
+}
+
+extern unsigned int __start___mmu_ftr_fixup, __stop___mmu_ftr_fixup;
+
+#endif /* !__ASSEMBLY__ */
+
+
 #ifdef CONFIG_PPC64
 /* 64-bit classic hash table MMU */
 #  include <asm/mmu-hash64.h>