[PATCH v7] RISC-V: enable XIP

David Hildenbrand david at redhat.com
Fri Apr 9 15:16:50 BST 2021

On 09.04.21 16:10, Mike Rapoport wrote:
> On Fri, Apr 09, 2021 at 02:07:24PM +0200, David Hildenbrand wrote:
>> On 09.04.21 13:39, Alex Ghiti wrote:
>>> Hi David,
>> I assume you still somehow create the direct mapping for the kernel, right?
>> So it's really some memory region with a direct mapping but without a memmap
>> (and right now, without a resource), correct?
> XIP kernel text is not a region in memory to begin with ;-)

I think that's the part that confused me. I thought it would be mapped 
somehow into physical address space and would be addressed like other 
memory -- just that reads would be rewired to go to flash.

> It resides in a flash and it is executed directly from there without being
> relocated to RAM.
> That's why it does not need neither direct mapping, nor struct pages.

Thanks for clarifying! :)


David / dhildenb

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