x86: apl: Add a CPU driver

Add a bare-bones CPU driver so that CPUs can be probed.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/x86/cpu/apollolake/cpu_common.c b/arch/x86/cpu/apollolake/cpu_common.c
new file mode 100644
index 0000000000..ba6bda37bc
--- /dev/null
+++ b/arch/x86/cpu/apollolake/cpu_common.c
@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <asm/cpu_common.h>
+#include <asm/msr.h>
+
+void cpu_flush_l1d_to_l2(void)
+{
+	struct msr_t msr;
+
+	msr = msr_read(MSR_POWER_MISC);
+	msr.lo |= FLUSH_DL1_L2;
+	msr_write(MSR_POWER_MISC, msr);
+}