mx25: Fix boot hang by avoiding vector relocation

Since commit 3ff46cc42b9d73d0 ("arm: relocate the exception vectors") mx25pdk hangs like this: CPU: Freescale i.MX25 rev1.2 at 399 MHz Reset cause: WDOG Board: MX25PDK I2C: ready DRAM: 64 MiB (hangs) Add a specific relocate_vectors macro that skips the vector relocation, as the i.MX25 SoC does not provide RAM at the high vectors address (0xFFFF0000), and (0x00000000) maps to ROM. This allows mx25 to boot again. Acked-By: Bill Pringlemeir <bpringlemeir@nbsps.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>

mx25: Fix boot hang by avoiding vector relocation
Since commit 3ff46cc42b9d73d0 ("arm: relocate the exception vectors") mx25pdk hangs like this: CPU: Freescale i.MX25 rev1.2 at 399 MHz Reset cause: WDOG Board: MX25PDK I2C: ready DRAM: 64 MiB (hangs) Add a specific relocate_vectors macro that skips the vector relocation, as the i.MX25 SoC does not provide RAM at the high vectors address (0xFFFF0000), and (0x00000000) maps to ROM. This allows mx25 to boot again. Acked-By: Bill Pringlemeir <bpringlemeir@nbsps.com> Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Fabio Estevam · Tom Rini
1 parent fa840b0921
Showing 2 changed files with 27 additions and 0 deletions Side-by-side Diff
arch/arm/cpu/arm926ejs/mx25/Makefile
arch/arm/cpu/arm926ejs/mx25/relocate.S
@@ -5,4 +5,8 @@
 # SPDX-License-Identifier:	GPL-2.0+
  
 obj-y	= generic.o timer.o reset.o
+
+ifndef CONFIG_SPL_BUILD
+obj-y	+= relocate.o
+endif
+/*
+ *  relocate - i.MX25-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.MX25 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)
...	...	@@ -5,4 +5,8 @@
5	5	# SPDX-License-Identifier: GPL-2.0+
6	6
7	7	obj-y = generic.o timer.o reset.o
	8	+
	9	+ifndef CONFIG_SPL_BUILD
	10	+obj-y += relocate.o
	11	+endif
	1	+/*
	2	+ * relocate - i.MX25-specific vector relocation
	3	+ *
	4	+ * Copyright (c) 2013 Albert ARIBAUD <albert.u.boot@aribaud.net>
	5	+ *
	6	+ * SPDX-License-Identifier: GPL-2.0+
	7	+ */
	8	+
	9	+#include <linux/linkage.h>
	10	+
	11	+/*
	12	+ * The i.MX25 SoC is very specific with respect to exceptions: it
	13	+ * does not provide RAM at the high vectors address (0xFFFF0000),
	14	+ * thus only the low address (0x00000000) is useable; but that is
	15	+ * in ROM, so let's avoid relocating the vectors.
	16	+ */
	17	+ .section .text.relocate_vectors,"ax",%progbits
	18	+
	19	+ENTRY(relocate_vectors)
	20	+
	21	+ bx lr
	22	+
	23	+ENDPROC(relocate_vectors)