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linux-next/arch/arm/mach-tegra/headsmp.S
Joseph Lo b095ae2b9f ARM: tegra: don't unlock MMIO access to DBGLAR
There is no need to unlock MMIO access to the DBGLAR all the time. Doing
so may even cause problems if a SW bug causes writes to that MMIO region.

Cortex-A15 processors do not support the CP14 register write the code
currently uses to unlock the DBGLAR; the instruction throws an undefined
instruction exceptions. This prevents tegra_secondary_startup() from
executing on Tegra114, and hence prevents SMP.

Remove the code that unlocks this access.

Signed-off-by: Joseph Lo <josephl@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
2013-03-11 14:29:22 -06:00

12 lines
240 B
ArmAsm

#include <linux/linkage.h>
#include <linux/init.h>
#include "sleep.h"
.section ".text.head", "ax"
ENTRY(tegra_secondary_startup)
bl v7_invalidate_l1
b secondary_startup
ENDPROC(tegra_secondary_startup)