Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4932
-gerrit
commit 4c586228147811c9c7a8ff3c0a7a96a5e37ae51c Author: Duncan Laurie dlaurie@chromium.org Date: Sun Nov 3 19:38:12 2013 -0800
baytrail: Reserve memory between ASEG and 1MB and for ramoops
Low system tables are in this region, and it is probably safer to keep ASEG reserved.
Also keep the region used by ramoops from being used by the OS and from being cleared by developer mode boots.
Lots more work needed to make the ACPI tables fully functional.
BUG=chrome-os-partner:23505 BRANCH=rambi TEST=boot on rambi and see that the kernel finds RSDP and uses ACPI
Change-Id: I4f7064d3cff14a3ecf15b194a1f20c1fa9d5e134 Signed-off-by: Duncan Laurie dlaurie@chromium.org Reviewed-on: https://chromium-review.googlesource.com/175554 Reviewed-by: Aaron Durbin adurbin@chromium.org Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/soc/intel/baytrail/northcluster.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/src/soc/intel/baytrail/northcluster.c b/src/soc/intel/baytrail/northcluster.c index 714d532..eca122c 100644 --- a/src/soc/intel/baytrail/northcluster.c +++ b/src/soc/intel/baytrail/northcluster.c @@ -117,6 +117,20 @@ static void nc_read_resources(device_t dev) if (bmbound_hi > four_gig_kib) ram_resource(dev, index++, four_gig_kib, bmbound_hi - four_gig_kib); + + /* Reserve everything between A segment and 1MB: + * + * 0xa0000 - 0xbffff: legacy VGA + * 0xc0000 - 0xfffff: RAM + */ + mmio_resource(dev, index++, (0xa0000 >> 10), (0xc0000 - 0xa0000) >> 10); + reserved_ram_resource(dev, index++, (0xc0000 >> 10), + (0x100000 - 0xc0000) >> 10); +#if CONFIG_CHROMEOS_RAMOOPS + reserved_ram_resource(dev, index++, + CONFIG_CHROMEOS_RAMOOPS_RAM_START >> 10, + CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE >> 10); +#endif }
static struct device_operations nc_ops = {