[U-Boot] [PATCH 04/13] arm926ejs: add noop implementation for dcache ops

[Ilya Yanok]

Added noop implementation for dcache operations that will buzz
about missing real implementation and disable the dcache.
This fixes compilation of DaVinci EMAC driver on arm926ejs.

Signed-off-by: Ilya Yanok <yanok at emcraft.com>
---
 arch/arm/cpu/arm926ejs/Makefile |    2 +-
 arch/arm/cpu/arm926ejs/cache.c  |   75 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm/cpu/arm926ejs/cache.c

diff --git a/arch/arm/cpu/arm926ejs/Makefile b/arch/arm/cpu/arm926ejs/Makefile
index a56ff08..5923e65 100644
--- a/arch/arm/cpu/arm926ejs/Makefile
+++ b/arch/arm/cpu/arm926ejs/Makefile
@@ -26,7 +26,7 @@ include $(TOPDIR)/config.mk
 LIB	= $(obj)lib$(CPU).o
 
 START	= start.o
-COBJS	= cpu.o
+COBJS	= cpu.o cache.o
 
 ifdef	CONFIG_SPL_BUILD
 ifdef	CONFIG_SPL_NO_CPU_SUPPORT_CODE
diff --git a/arch/arm/cpu/arm926ejs/cache.c b/arch/arm/cpu/arm926ejs/cache.c
new file mode 100644
index 0000000..4415642
--- /dev/null
+++ b/arch/arm/cpu/arm926ejs/cache.c
@@ -0,0 +1,75 @@
+/*
+ * (C) Copyright 2011
+ * Ilya Yanok, EmCraft Systems
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc.
+ */
+#include <linux/types.h>
+#include <common.h>
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+static inline void dcache_noop(void)
+{
+	if (dcache_status()) {
+		puts("WARNING: cache operations are not implemented!\n"
+		     "WARNING: disabling D-Cache now, you can re-enable it"
+		     "later with 'dcache on' command\n");
+		dcache_disable();
+	}
+}
+
+void invalidate_dcache_all(void)
+{
+	dcache_noop();
+}
+
+void flush_dcache_all(void)
+{
+	dcache_noop();
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+	dcache_noop();
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+	dcache_noop();
+}
+#else /* #ifndef CONFIG_SYS_DCACHE_OFF */
+void invalidate_dcache_all(void)
+{
+}
+
+void flush_dcache_all(void)
+{
+}
+
+void invalidate_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void flush_dcache_range(unsigned long start, unsigned long stop)
+{
+}
+
+void  flush_cache(unsigned long start, unsigned long size)
+{
+}
+#endif /* #ifndef CONFIG_SYS_DCACHE_OFF */
-- 
1.7.6.4