sh: Provide a global TLB flush for U/I-TLB clear.

This provides a sledgehammer approach for clearing the TLBs, only to be
used in cases where we know we will never want to use the mappings again
and have no interest in preserving state. This also destroys wired
entries.

The primary use for this is when we are either entering or exiting the
kernel completely, in the latter case as a precursor for CPU reset by
MMU.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/arch/sh/include/asm/tlbflush.h b/arch/sh/include/asm/tlbflush.h
index e0ac97221ae6..0df66f0c7284 100644
--- a/arch/sh/include/asm/tlbflush.h
+++ b/arch/sh/include/asm/tlbflush.h
@@ -21,6 +21,8 @@ extern void local_flush_tlb_kernel_range(unsigned long start,
                                          unsigned long end);
 extern void local_flush_tlb_one(unsigned long asid, unsigned long page);
 
+extern void __flush_tlb_global(void);
+
 #ifdef CONFIG_SMP
 
 extern void flush_tlb_all(void);