[U-Boot] [PATCH 11/22] spl: Add a comment to spl_set_bd()
Simon Glass
sjg at chromium.org
Wed Sep 26 21:55:09 UTC 2018
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.
Signed-off-by: Simon Glass <sjg at chromium.org>
---
common/spl/spl.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/common/spl/spl.c b/common/spl/spl.c
index 0f64902b9b0..69e4aca8a58 100644
--- a/common/spl/spl.c
+++ b/common/spl/spl.c
@@ -375,6 +375,10 @@ static int spl_common_init(bool setup_malloc)
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;
}
--
2.19.0.605.g01d371f741-goog
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