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| author | Paul Mundt <lethal@linux-sh.org> | 2010-07-02 08:44:09 +0200 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2010-07-02 08:44:09 +0200 |
| commit | 59615ecdb516cf218c3699b02d87d9827dc3e0c7 (patch) | |
| tree | 120c63e846caad2ba0f469cd608015e9a776193f /arch/sh/kernel | |
| parent | dmaengine: initialise DMA engine before MMC (diff) | |
| download | linux-59615ecdb516cf218c3699b02d87d9827dc3e0c7.tar.xz linux-59615ecdb516cf218c3699b02d87d9827dc3e0c7.zip | |
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>
Diffstat (limited to 'arch/sh/kernel')
| -rw-r--r-- | arch/sh/kernel/reboot.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sh/kernel/reboot.c b/arch/sh/kernel/reboot.c index b1fca66bb92e..ca6a5ca64015 100644 --- a/arch/sh/kernel/reboot.c +++ b/arch/sh/kernel/reboot.c @@ -9,6 +9,7 @@ #include <asm/addrspace.h> #include <asm/reboot.h> #include <asm/system.h> +#include <asm/tlbflush.h> 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(); |