[U-Boot] [PATCH] arm: bugfix: Move vector table before jumping relocated code

Tetsuyuki Kobayashi
2012-06-25T12:40:57Z

Interrupts and exceptions doesn't work in relocated code.
It badly use IRQ_STACK_START_IN in rom area as interrupt stack.
It is because the vecotr table is not moved to ram area.
This patch moves vector table before jumping relocated code.

Signed-off-by: Tetsuyuki Kobayashi <koba@kmckk.co.jp>
---
arch/arm/cpu/armv7/start.S | 12 ++++++++++++
1 file changed, 12 insertions(+)

diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S
index 52f7f6e..5098f7b 100644
--- a/arch/arm/cpu/armv7/start.S
+++ b/arch/arm/cpu/armv7/start.S
@@ -277,6 +277,18 @@ jump_2_ram:
mcr p15, 0, r0, c7, c10, 4 @ DSB
mcr p15, 0, r0, c7, c5, 4 @ ISB
#endif
+/*
+ * Move vector table
+ */
+#if !defined(CONFIG_TEGRA2)
+#if !(defined(CONFIG_OMAP44XX) && defined(CONFIG_SPL_BUILD))
+ /* Set vector address in CP15 VBAR register */
+ ldr r0, =_start
+ add r0, r0, r9
+ mcr p15, 0, r0, c12, c0, 0 @Set VBAR
+#endif
+#endif /* !Tegra2 */
+
ldr r0, _board_init_r_ofs
adr r1, _start
add lr, r0, r1
--
1.7.9.5