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>
diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile
index 1fde400..37e4209 100644
--- a/arch/x86/cpu/apollolake/Makefile
+++ b/arch/x86/cpu/apollolake/Makefile
@@ -4,8 +4,10 @@
obj-$(CONFIG_SPL_BUILD) += spl.o
obj-$(CONFIG_SPL_BUILD) += systemagent.o
+obj-y += cpu_common.o
ifndef CONFIG_TPL_BUILD
+obj-y += cpu.o
obj-y += punit.o
endif
diff --git a/arch/x86/cpu/apollolake/cpu.c b/arch/x86/cpu/apollolake/cpu.c
new file mode 100644
index 0000000..3d05c82
--- /dev/null
+++ b/arch/x86/cpu/apollolake/cpu.c
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#include <common.h>
+#include <cpu.h>
+#include <dm.h>
+#include <asm/cpu_common.h>
+#include <asm/cpu_x86.h>
+
+static int apl_get_info(struct udevice *dev, struct cpu_info *info)
+{
+ return cpu_intel_get_info(info, INTEL_BCLK_MHZ);
+}
+
+static int apl_get_count(struct udevice *dev)
+{
+ return 4;
+}
+
+static const struct cpu_ops cpu_x86_apl_ops = {
+ .get_desc = cpu_x86_get_desc,
+ .get_info = apl_get_info,
+ .get_count = apl_get_count,
+ .get_vendor = cpu_x86_get_vendor,
+};
+
+static const struct udevice_id cpu_x86_apl_ids[] = {
+ { .compatible = "intel,apl-cpu" },
+ { }
+};
+
+U_BOOT_DRIVER(cpu_x86_apl_drv) = {
+ .name = "cpu_x86_apl",
+ .id = UCLASS_CPU,
+ .of_match = cpu_x86_apl_ids,
+ .bind = cpu_x86_bind,
+ .ops = &cpu_x86_apl_ops,
+ .flags = DM_FLAG_PRE_RELOC,
+};
diff --git a/arch/x86/cpu/apollolake/cpu_common.c b/arch/x86/cpu/apollolake/cpu_common.c
new file mode 100644
index 0000000..ba6bda3
--- /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);
+}