From 59615ecdb516cf218c3699b02d87d9827dc3e0c7 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Fri, 2 Jul 2010 15:44:09 +0900 Subject: 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 --- arch/sh/kernel/reboot.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'arch/sh/kernel/reboot.c') diff --git a/arch/sh/kernel/reboot.c b/arch/sh/kernel/reboot.c index b1fca66bb92..ca6a5ca6401 100644 --- a/arch/sh/kernel/reboot.c +++ b/arch/sh/kernel/reboot.c @@ -9,6 +9,7 @@ #include #include #include +#include void (*pm_power_off)(void); EXPORT_SYMBOL(pm_power_off); @@ -25,6 +26,9 @@ static void native_machine_restart(char * __unused) { local_irq_disable(); + /* Destroy all of the TLBs in preparation for reset by MMU */ + __flush_tlb_global(); + /* Address error with SR.BL=1 first. */ trigger_address_error(); -- cgit v1.2.3-70-g09d2