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

[Tetsuyuki Kobayashi]

Hello,

(06/26/2012 12:10 AM), Stephen Warren wrote:
> On 06/25/2012 06:40 AM, Tetsuyuki Kobayashi wrote:
>> 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 at kmckk.co.jp>
> 
> CC'ing in some Tegra people.
> 
> Tetsuyuki, you probably want to CC some OMAP people too.

Thank you. 
I don't know proper person to CC because I am very new in this ML.
I need some help ..

'#if condition' in my patch is the same as the code setting VBAR right after reset.
(in file arch/arm/cpu/armv7/start.S)

> 
>> ---
>>  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
> 	
>