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authorFabio Estevam <fabio.estevam@freescale.com>2015-02-23 09:09:09 -0300
committerStefano Babic <sbabic@denx.de>2015-03-02 09:57:05 +0100
commit26688b216d6c72e958e389174bc077e4a7cd96d2 (patch)
tree1a51ce0af16de4b25d25364b8fc303c323cc21c7
parentfe021777c7fd0171c00a73d2114c2e795519ad4e (diff)
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mx35: Fix boot hang by avoiding vector relocation
Since commit 3ff46cc42b9d73d0 ("arm: relocate the exception vectors") mx35 does not boot anymore. Add a specific relocate_vectors macro that skips the vector relocation, as the i.MX35 SoC does not provide RAM at the high vectors address (0xFFFF0000), and (0x00000000) maps to ROM. This allows mx35 to boot again. Cc: Sebastian Priebe <sebastian.priebe@cadcon.de> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Tested-by: Stefano Babic <sbabic@denx.de>
-rw-r--r--arch/arm/cpu/arm1136/mx35/Makefile4
-rw-r--r--arch/arm/cpu/arm1136/mx35/relocate.S23
2 files changed, 27 insertions, 0 deletions
diff --git a/arch/arm/cpu/arm1136/mx35/Makefile b/arch/arm/cpu/arm1136/mx35/Makefile
index c533215..796db9c 100644
--- a/arch/arm/cpu/arm1136/mx35/Makefile
+++ b/arch/arm/cpu/arm1136/mx35/Makefile
@@ -10,3 +10,7 @@
obj-y += generic.o
obj-y += timer.o
obj-y += mx35_sdram.o
+
+ifndef CONFIG_SPL_BUILD
+obj-y += relocate.o
+endif
diff --git a/arch/arm/cpu/arm1136/mx35/relocate.S b/arch/arm/cpu/arm1136/mx35/relocate.S
new file mode 100644
index 0000000..43003f8
--- /dev/null
+++ b/arch/arm/cpu/arm1136/mx35/relocate.S
@@ -0,0 +1,23 @@
+/*
+ * relocate - i.MX35-specific vector relocation
+ *
+ * Copyright (c) 2013 Albert ARIBAUD <albert.u.boot@aribaud.net>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <linux/linkage.h>
+
+/*
+ * The i.MX35 SoC is very specific with respect to exceptions: it
+ * does not provide RAM at the high vectors address (0xFFFF0000),
+ * thus only the low address (0x00000000) is useable; but that is
+ * in ROM, so let's avoid relocating the vectors.
+ */
+ .section .text.relocate_vectors,"ax",%progbits
+
+ENTRY(relocate_vectors)
+
+ bx lr
+
+ENDPROC(relocate_vectors)