commit 3121dbd8c8c5aecb8f909921e081e1c0b524e6ce
author Simon Glass <sjg@chromium.org> Mon Nov 24 21:18:15 2014 -0700
committer Simon Glass <sjg@chromium.org> Tue Nov 25 06:34:11 2014 -0700
tree 6a5dfa7abd5ac5747acbc34f659371116e2d8ef2
parent 2096c8f05acb1be25689a01464b87cfd0a7ba84e

x86: Add LAPIC setup code

Add code to set up the Local Advanced Peripheral Interrupt Controller.

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

arch/x86/cpu/Makefile

diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 3839262..7f09db5 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -15,5 +15,6 @@
 obj-$(CONFIG_SYS_COREBOOT) += coreboot/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ivybridge/
 obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/
+obj-y += lapic.o
 obj-$(CONFIG_PCI) += pci.o
 obj-y += turbo.o

arch/x86/cpu/lapic.c

diff --git a/arch/x86/cpu/lapic.c b/arch/x86/cpu/lapic.c
new file mode 100644
index 0000000..4690603
--- /dev/null
+++ b/arch/x86/cpu/lapic.c
@@ -0,0 +1,57 @@
+/*
+ * From coreboot file of same name
+ *
+ * Copyright (C) 2008-2009 coresystems GmbH
+ * Copyright (C) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0
+ */
+
+#include <common.h>
+#include <asm/msr.h>
+#include <asm/io.h>
+#include <asm/lapic.h>
+#include <asm/post.h>
+
+void lapic_setup(void)
+{
+#if NEED_LAPIC == 1
+	/* Only Pentium Pro and later have those MSR stuff */
+	debug("Setting up local apic: ");
+
+	/* Enable the local apic */
+	enable_lapic();
+
+	/*
+	 * Set Task Priority to 'accept all'.
+	 */
+	lapic_write_around(LAPIC_TASKPRI,
+			   lapic_read_around(LAPIC_TASKPRI) & ~LAPIC_TPRI_MASK);
+
+	/* Put the local apic in virtual wire mode */
+	lapic_write_around(LAPIC_SPIV, (lapic_read_around(LAPIC_SPIV) &
+				~(LAPIC_VECTOR_MASK)) | LAPIC_SPIV_ENABLE);
+	lapic_write_around(LAPIC_LVT0, (lapic_read_around(LAPIC_LVT0) &
+			~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
+			  LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
+			  LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
+			  LAPIC_DELIVERY_MODE_MASK)) |
+			(LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
+			 LAPIC_DELIVERY_MODE_EXTINT));
+	lapic_write_around(LAPIC_LVT1, (lapic_read_around(LAPIC_LVT1) &
+			~(LAPIC_LVT_MASKED | LAPIC_LVT_LEVEL_TRIGGER |
+			  LAPIC_LVT_REMOTE_IRR | LAPIC_INPUT_POLARITY |
+			  LAPIC_SEND_PENDING | LAPIC_LVT_RESERVED_1 |
+			  LAPIC_DELIVERY_MODE_MASK)) |
+		(LAPIC_LVT_REMOTE_IRR | LAPIC_SEND_PENDING |
+			LAPIC_DELIVERY_MODE_NMI));
+
+	debug("apic_id: 0x%02lx, ", lapicid());
+#else /* !NEED_LLAPIC */
+	/* Only Pentium Pro and later have those MSR stuff */
+	debug("Disabling local apic: ");
+	disable_lapic();
+#endif /* !NEED_LAPIC */
+	debug("done.\n");
+	post_code(POST_LAPIC);
+}