Add a bare-bones CPU driver so that CPUs can be probed.
Signed-off-by: Simon Glass <[email protected]>
---
Changes in v4:
- Change apollolake to apl
- Tidy up header guards
Changes in v3:
- Add two more defines for the CPU driver
- Expand comments for BOOT_FROM_FAST_SPI_FLASH
Changes in v2: None
arch/x86/cpu/apollolake/Makefile | 1 +
arch/x86/cpu/apollolake/cpu.c | 51 ++++++++++++++++++++++
arch/x86/include/asm/arch-apollolake/cpu.h | 27 ++++++++++++
3 files changed, 79 insertions(+)
create mode 100644 arch/x86/cpu/apollolake/cpu.c
create mode 100644 arch/x86/include/asm/arch-apollolake/cpu.h
diff --git a/arch/x86/cpu/apollolake/Makefile b/arch/x86/cpu/apollolake/Makefile
index 1fde400d77..274d44e859 100644
--- a/arch/x86/cpu/apollolake/Makefile
+++ b/arch/x86/cpu/apollolake/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_SPL_BUILD) += spl.o
obj-$(CONFIG_SPL_BUILD) += systemagent.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 0000000000..089923e85a
--- /dev/null
+++ b/arch/x86/cpu/apollolake/cpu.c
@@ -0,0 +1,51 @@
+// 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>
+
+struct cpu_apl_priv {
+};
+
+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 int cpu_x86_apl_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+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,
+ .probe = cpu_x86_apl_probe,
+ .ops = &cpu_x86_apl_ops,
+ .priv_auto_alloc_size = sizeof(struct cpu_apl_priv),
+ .flags = DM_FLAG_PRE_RELOC,
+};
diff --git a/arch/x86/include/asm/arch-apollolake/cpu.h
b/arch/x86/include/asm/arch-apollolake/cpu.h
new file mode 100644
index 0000000000..ab712b0810
--- /dev/null
+++ b/arch/x86/include/asm/arch-apollolake/cpu.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2019 Google LLC
+ */
+
+#ifndef _ASM_ARCH_CPU_H
+#define _ASM_ARCH_CPU_H
+
+/* Common Timer Copy (CTC) frequency - 19.2MHz */
+#define CTC_FREQ 19200000
+
+/*
+ * Set to true to use the fast SPI driver to boot, instead of mapped SPI.
+ * You also need to enable CONFIG_APL_SPI_FLASH_BOOT.
+ */
+#define BOOT_FROM_FAST_SPI_FLASH false
+
+/*
+ * We need to read well past the end of the region in order for execution from
+ * the loaded data to work. It is not clear why.
+ */
+#define SAFETY_MARGIN 0x4000
+
+#define MAX_PCIE_PORTS 6
+#define CLKREQ_DISABLED 0xf
+
+#endif /* _ASM_ARCH_CPU_H */
--
2.24.0.432.g9d3f5f5b63-goog
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