1 files changed, 172 insertions, 0 deletions

diff --git a/kernel/arch/sh/mm/tlbflush_64.c b/kernel/arch/sh/mm/tlbflush_64.c
new file mode 100644
index 000000000..f33fdd255
--- /dev/null
+++ b/kernel/arch/sh/mm/tlbflush_64.c
@@ -0,0 +1,172 @@
+/*
+ * arch/sh/mm/tlb-flush_64.c
+ *
+ * Copyright (C) 2000, 2001  Paolo Alberelli
+ * Copyright (C) 2003  Richard Curnow (/proc/tlb, bug fixes)
+ * Copyright (C) 2003 - 2012 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 <linux/signal.h>
+#include <linux/rwsem.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/mman.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/perf_event.h>
+#include <linux/interrupt.h>
+#include <asm/io.h>
+#include <asm/tlb.h>
+#include <asm/uaccess.h>
+#include <asm/pgalloc.h>
+#include <asm/mmu_context.h>
+
+void local_flush_tlb_one(unsigned long asid, unsigned long page)
+{
+	unsigned long long match, pteh=0, lpage;
+	unsigned long tlb;
+
+	/*
+	 * Sign-extend based on neff.
+	 */
+	lpage = neff_sign_extend(page);
+	match = (asid << PTEH_ASID_SHIFT) | PTEH_VALID;
+	match |= lpage;
+
+	for_each_itlb_entry(tlb) {
+		asm volatile ("getcfg	%1, 0, %0"
+			      : "=r" (pteh)
+			      : "r" (tlb) );
+
+		if (pteh == match) {
+			__flush_tlb_slot(tlb);
+			break;
+		}
+	}
+
+	for_each_dtlb_entry(tlb) {
+		asm volatile ("getcfg	%1, 0, %0"
+			      : "=r" (pteh)
+			      : "r" (tlb) );
+
+		if (pteh == match) {
+			__flush_tlb_slot(tlb);
+			break;
+		}
+
+	}
+}
+
+void local_flush_tlb_page(struct vm_area_struct *vma, unsigned long page)
+{
+	unsigned long flags;
+
+	if (vma->vm_mm) {
+		page &= PAGE_MASK;
+		local_irq_save(flags);
+		local_flush_tlb_one(get_asid(), page);
+		local_irq_restore(flags);
+	}
+}
+
+void local_flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
+			   unsigned long end)
+{
+	unsigned long flags;
+	unsigned long long match, pteh=0, pteh_epn, pteh_low;
+	unsigned long tlb;
+	unsigned int cpu = smp_processor_id();
+	struct mm_struct *mm;
+
+	mm = vma->vm_mm;
+	if (cpu_context(cpu, mm) == NO_CONTEXT)
+		return;
+
+	local_irq_save(flags);
+
+	start &= PAGE_MASK;
+	end &= PAGE_MASK;
+
+	match = (cpu_asid(cpu, mm) << PTEH_ASID_SHIFT) | PTEH_VALID;
+
+	/* Flush ITLB */
+	for_each_itlb_entry(tlb) {
+		asm volatile ("getcfg	%1, 0, %0"
+			      : "=r" (pteh)
+			      : "r" (tlb) );
+
+		pteh_epn = pteh & PAGE_MASK;
+		pteh_low = pteh & ~PAGE_MASK;
+
+		if (pteh_low == match && pteh_epn >= start && pteh_epn <= end)
+			__flush_tlb_slot(tlb);
+	}
+
+	/* Flush DTLB */
+	for_each_dtlb_entry(tlb) {
+		asm volatile ("getcfg	%1, 0, %0"
+			      : "=r" (pteh)
+			      : "r" (tlb) );
+
+		pteh_epn = pteh & PAGE_MASK;
+		pteh_low = pteh & ~PAGE_MASK;
+
+		if (pteh_low == match && pteh_epn >= start && pteh_epn <= end)
+			__flush_tlb_slot(tlb);
+	}
+
+	local_irq_restore(flags);
+}
+
+void local_flush_tlb_mm(struct mm_struct *mm)
+{
+	unsigned long flags;
+	unsigned int cpu = smp_processor_id();
+
+	if (cpu_context(cpu, mm) == NO_CONTEXT)
+		return;
+
+	local_irq_save(flags);
+
+	cpu_context(cpu, mm) = NO_CONTEXT;
+	if (mm == current->mm)
+		activate_context(mm, cpu);
+
+	local_irq_restore(flags);
+}
+
+void local_flush_tlb_all(void)
+{
+	/* Invalidate all, including shared pages, excluding fixed TLBs */
+	unsigned long flags, tlb;
+
+	local_irq_save(flags);
+
+	/* Flush each ITLB entry */
+	for_each_itlb_entry(tlb)
+		__flush_tlb_slot(tlb);
+
+	/* Flush each DTLB entry */
+	for_each_dtlb_entry(tlb)
+		__flush_tlb_slot(tlb);
+
+	local_irq_restore(flags);
+}
+
+void local_flush_tlb_kernel_range(unsigned long start, unsigned long end)
+{
+        /* FIXME: Optimize this later.. */
+        flush_tlb_all();
+}
+
+void __flush_tlb_global(void)
+{
+	flush_tlb_all();
+}