disabling MMU of ARMv7-A

[Marc C]

Hi Chanho,

> However, ARMv7-A/R doesn't have such register. They can only control whether
> use _HIGH_ vector or no

Not entirely accurate. ARMv7-A, and the Cortex-A9, specify the Vector
Base Address
Register, or VBAR [1].

-Marc

[1]http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.ddi0388f/CIHGDDEI.html

On Fri, Mar 28, 2014 at 12:15 AM, Chanho Park <chanho61.park at samsung.com> wrote:
> Hi all,
>
> I want to know is there anyone who tried disabling MMU of ARMv7-A likes
> cortex-a9.
> Yes. I know this is a silly question :)
> I turned off CONFIG_MMU option of my exynos4 board and specified
> CONFIG_DRAM_BASE/SIZE and REMAP_VECTORS_TO_RAM.
> The problem is occurred in here there is no way to specify the vector table
> address.
> As I know the cortex-M3/4 has VTOR(Vector table offset register) to specify
> the vector table address.
> However, ARMv7-A/R doesn't have such register. They can only control whether
> use _HIGH_ vector or not.
> In this situation, can I find a way to boot successfully with
> nommu+cortex-a9?
>
> Thanks.
>
> Best Regards,
> Chanho Park
>
>
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