spl: Add a comment to spl_set_bd()
There is a strange feature to set global_data to a data-section variable
early in SPL. This only works if SPL actually has access to SRAM which is
not the case on x86, for eaxmple. Add a comment to this effect.
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 5a026b8..4313710 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -378,6 +378,10 @@
void spl_set_bd(void)
{
+ /*
+ * NOTE: On some platforms (e.g. x86) bdata may be in flash and not
+ * writeable.
+ */
if (!gd->bd)
gd->bd = &bdata;
}