[coreboot-gerrit] Patch merged into coreboot/master: 8e4a355 coreboot: introduce CONFIG_RELOCATABLE_RAMSTAGE

gerrit at coreboot.org gerrit at coreboot.org
Thu Mar 21 22:28:29 CET 2013

the following patch was just integrated into master:
commit 8e4a355773cc64a89b3fc4d79981cfb02bda7e66
Author: Aaron Durbin <adurbin at chromium.org>
Date:   Fri Feb 8 17:28:04 2013 -0600

    coreboot: introduce CONFIG_RELOCATABLE_RAMSTAGE
    This patch adds an option to build the ramstage as a reloctable binary.
    It uses the rmodule library for the relocation. The main changes
    consist of the following:
    1. The ramstage is loaded just under the cmbem space.
    2. Payloads cannot be loaded over where ramstage is loaded. If a payload
       is attempted to load where the relocatable ramstage resides the load
       is aborted.
    3. The memory occupied by the ramstage is reserved from the OS's usage
       using the romstage_handoff structure stored in cbmem. This region is
       communicated to ramstage by an CBMEM_ID_ROMSTAGE_INFO entry in cbmem.
    4. There is no need to reserve cbmem space for the OS controlled memory for
       the resume path because the ramsage region has been reserved in #3.
    5. Since no memory needs to be preserved in the wake path, the loading
       and begin of execution of a elf payload is straight forward.
    Change-Id: Ia66cf1be65c29fa25ca7bd9ea6c8f11d7eee05f5
    Signed-off-by: Aaron Durbin <adurbin at chromium.org>
    Reviewed-on: http://review.coreboot.org/2792
    Reviewed-by: Ronald G. Minnich <rminnich at gmail.com>
    Tested-by: build bot (Jenkins)
    Reviewed-by: Aaron Durbin <adurbin at google.com>

Build-Tested: build bot (Jenkins) at Thu Mar 21 22:13:27 2013, giving +1
See http://review.coreboot.org/2792 for details.


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