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-rw-r--r--kernel/arch/sh/mm/tlbflush_64.c172
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();
+}