[PATCH 2/3] arm: implement invalidate_icache_all on ARM11

[Heinrich Schuchardt]

In EFI sub-system we rely on invalidate_icache_all() to invalidate the
instruction cache after loading binaries. Add the missing implementation on
ARM1136, ARM1176.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
---
 arch/arm/cpu/arm11/cpu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/arch/arm/cpu/arm11/cpu.c b/arch/arm/cpu/arm11/cpu.c
index 01d2e1a125d..4bf0446b543 100644
--- a/arch/arm/cpu/arm11/cpu.c
+++ b/arch/arm/cpu/arm11/cpu.c
@@ -116,3 +116,15 @@ void enable_caches(void)
 #endif
 }
 #endif
+
+#if !CONFIG_IS_ENABLED(SYS_ICACHE_OFF)
+/* Invalidate entire I-cache */
+void invalidate_icache_all(void)
+{
+	unsigned long i = 0;
+
+	asm ("mcr p15, 0, %0, c7, c5, 0" : : "r" (i));
+}
+#else
+void invalidate_icache_all(void) {}
+#endif
-- 
2.43.0