x86: Add a dummy implementation for timer_get_us

The microsecond timer is not currently implemented, but add a dummy
implementation for now.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/x86/cpu/Makefile b/arch/x86/cpu/Makefile
index be27dd9e2b56332300495a5763a40d96c9d98eb1..57324b61749edbeb3fadfe045252d3fd7a8560a5 100644 (file)
--- a/arch/x86/cpu/Makefile
+++ b/arch/x86/cpu/Makefile
@@ -30,7 +30,7 @@ LIB   = $(obj)lib$(CPU).o
 
 START-y        = start.o
 RESET_OBJS-$(CONFIG_X86_NO_RESET_VECTOR) += resetvec.o start16.o
-COBJS  = interrupts.o cpu.o
+COBJS  = interrupts.o cpu.o timer.o
 
 SRCS   := $(START:.o=.S) $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS   := $(addprefix $(obj),$(SOBJS) $(COBJS))

diff --git a/arch/x86/cpu/timer.c b/arch/x86/cpu/timer.c
new file mode 100644 (file)
index 0000000..149109d
--- /dev/null
+++ b/arch/x86/cpu/timer.c
@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ */
+
+#include <common.h>
+
+unsigned long timer_get_us(void)
+{
+       printf("timer_get_us used but not implemented.\n");
+       return 0;
+}