sandbox: implement invalidate_icache_all()

Before executing code that we have loaded from a file we need to flush the
data cache and invalidate the instruction flash.

Implement functions flush_cache() and invalidate_icache_all().

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/Makefile b/arch/sandbox/cpu/Makefile
index bac9644..de7fe7f 100644 (file)
--- a/arch/sandbox/cpu/Makefile
+++ b/arch/sandbox/cpu/Makefile
@@ -5,7 +5,7 @@
 # (C) Copyright 2000-2003
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 
-obj-y  := cpu.o state.o
+obj-y  := cache.o cpu.o state.o
 extra-y        := start.o os.o
 extra-$(CONFIG_SANDBOX_SDL)    += sdl.o
 obj-$(CONFIG_SPL_BUILD)        += spl.o

diff --git a/arch/sandbox/cpu/cache.c b/arch/sandbox/cpu/cache.c
new file mode 100644 (file)
index 0000000..46c62c0
--- /dev/null
+++ b/arch/sandbox/cpu/cache.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2020, Heinrich Schuchardt <xypron.glpk@gmx.de>
+ */
+
+#include <common.h>
+#include <cpu_func.h>
+#include <asm/state.h>
+
+void flush_cache(unsigned long addr, unsigned long size)
+{
+       /* Clang uses (char *) parameters, GCC (void *) */
+       __builtin___clear_cache((void *)addr, (void *)(addr + size));
+}
+
+void invalidate_icache_all(void)
+{
+       struct sandbox_state *state = state_get_current();
+
+       /* Clang uses (char *) parameters, GCC (void *) */
+       __builtin___clear_cache((void *)state->ram_buf,
+                               (void *)(state->ram_buf + state->ram_size));
+}

diff --git a/board/sandbox/sandbox.c b/board/sandbox/sandbox.c
index 18a605d..3235541 100644 (file)
--- a/board/sandbox/sandbox.c
+++ b/board/sandbox/sandbox.c
@@ -28,10 +28,6 @@ U_BOOT_DEVICE(gpio_sandbox) = {
 };
 #endif
 
-void flush_cache(unsigned long start, unsigned long size)
-{
-}
-
 #ifndef CONFIG_TIMER
 /* system timer offset in ms */
 static unsigned long sandbox_timer_offset;