diff options
| author | Duncan Laurie <dlaurie@chromium.org> | 2013-11-03 19:38:12 -0800 |
|---|---|---|
| committer | Aaron Durbin <adurbin@google.com> | 2014-03-11 19:56:17 +0100 |
| commit | e7e78d61a96072ba619f95eba9762a0ca50abe15 (patch) | |
| tree | 6d0d8330ba0bfd4ed6e28c55507cc4a2b301bc59 /src/soc | |
| parent | 714b1e8b6ca00f43f920e7a3f3db8f039356ce50 (diff) | |
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>
Reviewed-on: http://review.coreboot.org/4932
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Diffstat (limited to 'src/soc')
| -rw-r--r-- | src/soc/intel/baytrail/northcluster.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/soc/intel/baytrail/northcluster.c b/src/soc/intel/baytrail/northcluster.c index 714d532eef..eca122c056 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 = { |