armv7: Adding cpu specific cache managmenent

Some CPU (i.e u8500) need more cache management before launching
the Linux kernel.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: John Rigby <john.rigby@linaro.org>

arch/arm/cpu/armv7/cpu.c

@@ -36,6 +36,7 @@
 #include <asm/system.h>
 #include <asm/cache.h>
 #include <asm/armv7.h>
+#include <linux/compiler.h>
 
 void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3)
 {
@@ -44,6 +45,8 @@ void save_boot_params_default(u32 r0, u32 r1, u32 r2, u32 r3)
 void save_boot_params(u32 r0, u32 r1, u32 r2, u32 r3)
 	__attribute__((weak, alias("save_boot_params_default")));
 
+void __weak cpu_cache_initialization(void){}
+
 int cleanup_before_linux(void)
 {
 	/*
@@ -81,5 +84,10 @@ int cleanup_before_linux(void)
 	 */
 	invalidate_dcache_all();
 
+	/*
+	 * Some CPU need more cache attention before starting the kernel.
+	 */
+	cpu_cache_initialization();
+
 	return 0;
 }