sh: Move in the SH-5 mmu_context headers.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/mmu_context_64.h b/include/asm-sh/mmu_context_64.h
new file mode 100644
index 0000000..020be74
--- /dev/null
+++ b/include/asm-sh/mmu_context_64.h
@@ -0,0 +1,75 @@
+#ifndef __ASM_SH_MMU_CONTEXT_64_H
+#define __ASM_SH_MMU_CONTEXT_64_H
+
+/*
+ * sh64-specific mmu_context interface.
+ *
+ * Copyright (C) 2000, 2001 Paolo Alberelli
+ * Copyright (C) 2003 - 2007 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+#include <asm/cpu/registers.h>
+#include <asm/cacheflush.h>
+
+#define SR_ASID_MASK 0xffffffffff00ffffULL
+#define SR_ASID_SHIFT 16
+
+/*
+ * Destroy context related info for an mm_struct that is about
+ * to be put to rest.
+ */
+static inline void destroy_context(struct mm_struct *mm)
+{
+ /* Well, at least free TLB entries */
+ flush_tlb_mm(mm);
+}
+
+static inline unsigned long get_asid(void)
+{
+ unsigned long long sr;
+
+ asm volatile ("getcon " __SR ", %0\n\t"
+ : "=r" (sr));
+
+ sr = (sr >> SR_ASID_SHIFT) & MMU_CONTEXT_ASID_MASK;
+ return (unsigned long) sr;
+}
+
+/* Set ASID into SR */
+static inline void set_asid(unsigned long asid)
+{
+ unsigned long long sr, pc;
+
+ asm volatile ("getcon " __SR ", %0" : "=r" (sr));
+
+ sr = (sr & SR_ASID_MASK) | (asid << SR_ASID_SHIFT);
+
+ /*
+ * It is possible that this function may be inlined and so to avoid
+ * the assembler reporting duplicate symbols we make use of the
+ * gas trick of generating symbols using numerics and forward
+ * reference.
+ */
+ asm volatile ("movi 1, %1\n\t"
+ "shlli %1, 28, %1\n\t"
+ "or %0, %1, %1\n\t"
+ "putcon %1, " __SR "\n\t"
+ "putcon %0, " __SSR "\n\t"
+ "movi 1f, %1\n\t"
+ "ori %1, 1 , %1\n\t"
+ "putcon %1, " __SPC "\n\t"
+ "rte\n"
+ "1:\n\t"
+ : "=r" (sr), "=r" (pc) : "0" (sr));
+}
+
+/* No spare register to twiddle, so use a software cache */
+extern pgd_t *mmu_pdtp_cache;
+
+#define set_TTB(pgd) (mmu_pdtp_cache = (pgd))
+#define get_TTB() (mmu_pdtp_cache)
+
+#endif /* __ASM_SH_MMU_CONTEXT_64_H */