Re: [Qemu-devel] [RFC] extensions to the -m memory option

[Peter Maydell]

On 2 June 2015 at 11:32, Peter Crosthwaite <address@hidden> wrote:
> On Tue, Jun 2, 2015 at 3:15 AM, Liviu Ionescu <address@hidden> wrote:
>> similar content is also present in Table B3-1 "ARMv7-M address map", in ARM 
>> DDI 0403D, "ARMv7-M Architecture Reference Manual".
>>
>> 0x00000000-0x1FFFFFFF | Code | Typically ROM or flash memory. Memory 
>> required from address 0x0 to support the vector table for system boot code 
>> on reset.
>> 0x20000000-0x3FFFFFFF | SRAM | SRAM region typically used for on-chip RAM.
>>
>
> The Devil is in the "typically" which means it's not actually specced
> on the processor layer. I think the case is reasonable for your
> intermediate layer though with a critical mass of vendors opting into
> this "typical" case.

Yep. The CPU itself (and the M profile architecture) are opinionated
about the memory map layout (much more so than A/R profile), but don't
actually insist on it, and the flash/ROM are outside the core proper.

-- PMM