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 koba@kmckk.co.jp wrote:
This patch moves vector table before jumping relocated code.
Signed-off-by: Tetsuyuki Kobayashikoba@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, =_startadd r0, r0, r9mcr 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.