[PATCH] common: limit CONFIG_TEXT_BASE to 32-bit

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

The linker scripts fail in an odd way if CONFIG_TEXT_BASE doesn't
fit in 32-bit, e.g. reporting that the PBL is greater than
0xffffffff, because CONFIG_TEXT_BASE is bigger than that.

As new platform should just select CONFIG_PBL_RELOCATABLE and
CONFIG_RELOCATABLE anyway, let's enforce the 32-bit maximum in
Kconfig to make errors easier to grok.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
---
 common/Kconfig | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/common/Kconfig b/common/Kconfig
index 5346ba5a623c..11aabbb509df 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -198,9 +198,13 @@ config TEXT_BASE
 	depends on HAVE_CONFIGURABLE_TEXT_BASE
 	prompt "TEXT_BASE"
 	hex
+	range 0 0xffffffff
 	default ARCH_TEXT_BASE
 	help
-	  The Address barebox gets linked at.
+	  The 32-bit address barebox gets linked at. This is forced
+	  to zero for relocatable barebox and fixed up at runtime,
+	  so barebox is executable on arbitrary addresses (given
+	  sufficient alignment).
 
 config BAREBOX_MAX_IMAGE_SIZE
 	prompt "Maximum size of barebox"
-- 
2.39.2