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-rw-r--r--arch/arm/mach-ux500/Kconfig1
-rw-r--r--arch/arm/mach-ux500/cache-l2x0.c25
2 files changed, 25 insertions, 1 deletions
diff --git a/arch/arm/mach-ux500/Kconfig b/arch/arm/mach-ux500/Kconfig
index 4210cb434dbc..a3e0c8692f0d 100644
--- a/arch/arm/mach-ux500/Kconfig
+++ b/arch/arm/mach-ux500/Kconfig
@@ -6,6 +6,7 @@ config UX500_SOC_COMMON
select ARM_GIC
select HAS_MTU
select ARM_ERRATA_753970
+ select ARM_ERRATA_754322
menu "Ux500 SoC"
diff --git a/arch/arm/mach-ux500/cache-l2x0.c b/arch/arm/mach-ux500/cache-l2x0.c
index 9d09e4d013b9..122ddde00ba7 100644
--- a/arch/arm/mach-ux500/cache-l2x0.c
+++ b/arch/arm/mach-ux500/cache-l2x0.c
@@ -50,7 +50,27 @@ static void ux500_l2x0_inv_all(void)
ux500_cache_sync();
}
-static int ux500_l2x0_init(void)
+static int __init ux500_l2x0_unlock(void)
+{
+ int i;
+
+ /*
+ * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
+ * apparently locks both caches before jumping to the kernel. The
+ * l2x0 core will not touch the unlock registers if the l2x0 is
+ * already enabled, so we do it right here instead. The PL310 has
+ * 8 sets of registers, one per possible CPU.
+ */
+ for (i = 0; i < 8; i++) {
+ writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_D_BASE +
+ i * L2X0_LOCKDOWN_STRIDE);
+ writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
+ i * L2X0_LOCKDOWN_STRIDE);
+ }
+ return 0;
+}
+
+static int __init ux500_l2x0_init(void)
{
if (cpu_is_u5500())
l2x0_base = __io_address(U5500_L2CC_BASE);
@@ -59,6 +79,9 @@ static int ux500_l2x0_init(void)
else
ux500_unknown_soc();
+ /* Unlock before init */
+ ux500_l2x0_unlock();
+
/* 64KB way size, 8 way associativity, force WA */
l2x0_init(l2x0_base, 0x3e060000, 0xc0000fff);