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| author | Joseph Lo <josephl@nvidia.com> | 2013-01-03 07:42:59 +0100 |
|---|---|---|
| committer | Stephen Warren <swarren@nvidia.com> | 2013-01-28 18:21:44 +0100 |
| commit | 57886616ca7bff844a6427436d0c8faf74653f73 (patch) | |
| tree | 4c353be72a7f266727320189e8e91965b93fa0b0 /arch/arm/mach-tegra/hotplug.c | |
| parent | ARM: tegra30: fix power up sequence for boot_secondary (diff) | |
| download | linux-57886616ca7bff844a6427436d0c8faf74653f73.tar.xz linux-57886616ca7bff844a6427436d0c8faf74653f73.zip | |
ARM: tegra: update the cache maintenance order for CPU shutdown
Updating the cache maintenance order before CPU shutdown when doing CPU
hotplug.
The old order:
* clean L1 by flush_cache_all
* exit SMP
* CPU shutdown
Adapt to:
* disable L1 data cache by clear C bit
* clean L1 by v7_flush_dcache_louis
* exit SMP
* CPU shutdown
For CPU hotplug case, it's no need to do "flush_cache_all". And we should
disable L1 data cache before clean L1 data cache. Then leaving the SMP
coherency.
Signed-off-by: Joseph Lo <josephl@nvidia.com>
Acked-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/mach-tegra/hotplug.c')
| -rw-r--r-- | arch/arm/mach-tegra/hotplug.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-tegra/hotplug.c b/arch/arm/mach-tegra/hotplug.c index dca5141a2c31..d8c683b875d1 100644 --- a/arch/arm/mach-tegra/hotplug.c +++ b/arch/arm/mach-tegra/hotplug.c @@ -28,8 +28,8 @@ void __ref tegra_cpu_die(unsigned int cpu) { cpu = cpu_logical_map(cpu); - /* Flush the L1 data cache. */ - flush_cache_all(); + /* Clean L1 data cache */ + tegra_disable_clean_inv_dcache(); /* Shut down the current CPU. */ tegra_hotplug_shutdown(); |