[U-Boot] [PATCH 52/82] x86: Add cpu code for x86_64
Simon Glass
sjg at chromium.org
Mon Sep 26 05:33:55 CEST 2016
There is not much needed at present, but set up a separate directory to put
this code as it grows.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
arch/x86/cpu/Makefile | 4 +++-
arch/x86/cpu/x86_64/Makefile | 6 ++++++
arch/x86/cpu/x86_64/cpu.c | 35 +++++++++++++++++++++++++++++++++++
arch/x86/cpu/x86_64/interrupts.c | 30 ++++++++++++++++++++++++++++++
4 files changed, 74 insertions(+), 1 deletion(-)
create mode 100644 arch/x86/cpu/x86_64/Makefile
create mode 100644 arch/x86/cpu/x86_64/cpu.c
create mode 100644 arch/x86/cpu/x86_64/interrupts.c
diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index 41ad481..7f89ff0 100644
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -38,6 +38,8 @@ obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_SMP) += sipi_vector.o
obj-y += turbo.o
-ifeq ($(CONFIG_$(SPL_)X86_64),)
+ifeq ($(CONFIG_$(SPL_)X86_64),y)
+obj-y += x86_64/
+else
obj-y += i386/
endif
diff --git a/arch/x86/cpu/x86_64/Makefile b/arch/x86/cpu/x86_64/Makefile
new file mode 100644
index 0000000..4b06386
--- /dev/null
+++ b/arch/x86/cpu/x86_64/Makefile
@@ -0,0 +1,6 @@
+#
+# (C) Copyright 2016 Google, Inc
+# Written by Simon Glass <sjg at chromium.org>
+#
+
+obj-y += cpu.o interrupts.o
diff --git a/arch/x86/cpu/x86_64/cpu.c b/arch/x86/cpu/x86_64/cpu.c
new file mode 100644
index 0000000..c1d3788
--- /dev/null
+++ b/arch/x86/cpu/x86_64/cpu.c
@@ -0,0 +1,35 @@
+/*
+ * (C) Copyright 2016 Google, Inc
+ * Written by Simon Glass <sjg at chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <debug_uart.h>
+
+int cpu_has_64bit(void)
+{
+ return true;
+}
+
+void enable_caches(void)
+{
+ /* Not implemented */
+}
+
+void disable_caches(void)
+{
+ /* Not implemented */
+}
+
+int dcache_status(void)
+{
+ return true;
+}
+
+int x86_mp_init(void)
+{
+ /* Not implemented */
+ return 0;
+}
diff --git a/arch/x86/cpu/x86_64/interrupts.c b/arch/x86/cpu/x86_64/interrupts.c
new file mode 100644
index 0000000..d814b6a
--- /dev/null
+++ b/arch/x86/cpu/x86_64/interrupts.c
@@ -0,0 +1,30 @@
+/*
+ * (C) Copyright 2016 Google, Inc
+ * Written by Simon Glass <sjg at chromium.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor-flags.h>
+
+void enable_interrupts(void)
+{
+ asm("sti\n");
+}
+
+int disable_interrupts(void)
+{
+ long flags;
+
+ asm volatile ("pushfq ; popq %0 ; cli\n" : "=g" (flags) : );
+
+ return flags & X86_EFLAGS_IF;
+}
+
+int interrupt_init(void)
+{
+ /* Nothing to do - this was already done in SPL */
+ return 0;
+}
+
--
2.8.0.rc3.226.g39d4020
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