From: Fabio Estevam fabio.estevam@freescale.com
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.
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com --- Changes since v1: - Skip the vector relocation on mx25
arch/arm/cpu/arm926ejs/mx25/Makefile | 4 ++++ arch/arm/cpu/arm926ejs/mx25/relocate.S | 23 +++++++++++++++++++++++ 2 files changed, 27 insertions(+) create mode 100644 arch/arm/cpu/arm926ejs/mx25/relocate.S
diff --git a/arch/arm/cpu/arm926ejs/mx25/Makefile b/arch/arm/cpu/arm926ejs/mx25/Makefile index 134c69d..ebc0407 100644 --- a/arch/arm/cpu/arm926ejs/mx25/Makefile +++ b/arch/arm/cpu/arm926ejs/mx25/Makefile @@ -5,3 +5,7 @@ # SPDX-License-Identifier: GPL-2.0+
obj-y = generic.o timer.o reset.o + +ifndef CONFIG_SPL_BUILD +obj-y += relocate.o +endif diff --git a/arch/arm/cpu/arm926ejs/mx25/relocate.S b/arch/arm/cpu/arm926ejs/mx25/relocate.S new file mode 100644 index 0000000..8ebb81f --- /dev/null +++ b/arch/arm/cpu/arm926ejs/mx25/relocate.S @@ -0,0 +1,23 @@ +/* + * 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)