From c21f407bf01cf497fd03fe404c1f06bdb36c88f9 Mon Sep 17 00:00:00 2001 From: Simon Glass Date: Thu, 15 Nov 2018 18:43:58 -0700 Subject: [PATCH] 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 Signed-off-by: Simon Glass --- common/spl/spl.c | 4 ++++ 1 file changed, 4 insertions(+) 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 @@ 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; } -- 2.7.4