ARM: l2c: write auxctrl register before unlocking

We should write the auxillary control register before unlocking: the
write may be necessary to enable non-secure access to the lock
registers.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/arch/arm/mm/cache-l2x0.c b/arch/arm/mm/cache-l2x0.c
index 2adb82e..fc60955 100644 (file)
--- a/arch/arm/mm/cache-l2x0.c
+++ b/arch/arm/mm/cache-l2x0.c
@@ -92,10 +92,10 @@ static void l2c_enable(void __iomem *base, u32 aux, unsigned num_lock)
 {
        unsigned long flags;
 
-       l2c_unlock(base, num_lock);
-
        writel_relaxed(aux, base + L2X0_AUX_CTRL);
 
+       l2c_unlock(base, num_lock);
+
        local_irq_save(flags);
        __l2c_op_way(base + L2X0_INV_WAY);
        writel_relaxed(0, base + sync_reg_offset);
@@ -368,12 +368,12 @@ static void l2x0_unlock(u32 cache_id)
 
 static void l2x0_enable(void __iomem *base, u32 aux, unsigned num_lock)
 {
-       /* Make sure that I&D is not locked down when starting */
-       l2x0_unlock(readl_relaxed(base + L2X0_CACHE_ID));
-
        /* l2x0 controller is disabled */
        writel_relaxed(aux, base + L2X0_AUX_CTRL);
 
+       /* Make sure that I&D is not locked down when starting */
+       l2x0_unlock(readl_relaxed(base + L2X0_CACHE_ID));
+
        l2x0_inv_all();
 
        /* enable L2X0 */