[jira] [Commented] (MYNEWT-133) Need support for running from RAM

["Marko Kiiskila (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MYNEWT-133?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16078512#comment-16078512 ] 

Marko Kiiskila commented on MYNEWT-133:
---------------------------------------

The bug as described is already supported; linker scripts allow this to be done.

What is not possible is to have the whole program copied to SRAM, and directly jump there. System startup code still has to be in flash. To support copying the whole image straight to flash requires changes to image header, and therefore we'd be diverging our code from mcuboot effort. We can do this, of course, but I'd rather wait for a really good reason to do that :) Or re-file the ticket against mcuboot.

> Need support for running from RAM
> ---------------------------------
>
>                 Key: MYNEWT-133
>                 URL: https://issues.apache.org/jira/browse/MYNEWT-133
>             Project: Mynewt
>          Issue Type: New Feature
>      Security Level: Public(Viewable by anyone) 
>          Components: Bootloader, Flash, Image Mgmt, OS
>            Reporter: Sterling Hughes
>            Assignee: Marko Kiiskila
>             Fix For: v1_2_0_rel
>
>
> Right now we program internal flash to run from, must provide support for running from RAM, and a combination of different RAMs (e.g. internal ram for critical code sections, external ram for non-critical sections.) 



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