sandbox: Allow reading/writing of RAM buffer
It is useful to be able to save and restore the RAM contents of sandbox
U-Boot either for setting up tests, for later analysys, or for chaining
together multiple tests which need to keep the same memory contents.
Add a function to provide a memory file for U-Boot. This is read on
start-up and written when shutting down. If the file does not exist
on start-up, it will be created when shutting down.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/sandbox/cpu/state.c b/arch/sandbox/cpu/state.c
index 56d5041..0380fe2 100644
--- a/arch/sandbox/cpu/state.c
+++ b/arch/sandbox/cpu/state.c
@@ -4,6 +4,7 @@
*/
#include <common.h>
+#include <os.h>
#include <asm/state.h>
/* Main state record for the sandbox */
@@ -25,6 +26,10 @@
{
state = &main_state;
+ state->ram_size = CONFIG_SYS_SDRAM_SIZE;
+ state->ram_buf = os_malloc(state->ram_size);
+ assert(state->ram_buf);
+
/*
* Example of how to use GPIOs:
*
@@ -33,3 +38,20 @@
*/
return 0;
}
+
+int state_uninit(void)
+{
+ int err;
+
+ state = &main_state;
+
+ if (state->write_ram_buf) {
+ err = os_write_ram_buf(state->ram_buf_fname);
+ if (err) {
+ printf("Failed to write RAM buffer\n");
+ return err;
+ }
+ }
+
+ return 0;
+}