Hello, Joel
(2012/12/22 0:17), Joel A Fernandes wrote:
Hi Tesuyuki and friends,
I had a question with this patch.
On Wed, Jun 27, 2012 at 8:27 PM, Tetsuyuki Kobayashi <k...@kmckk.co.jp> wrote:
This patch moves vector table before jumping relocated code.
Signed-off-by: Tetsuyuki Kobayashi<k...@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
Why is c12 (VBAR) setup only for SPL builds? Because main u-boot does
relocation too, shouldn't we setup c12 to point to new table addr
after relocation?
You may mis-understand. ! means NOT.
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