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| author | Patrick Rudolph <siro@das-labor.org> | 2015-10-15 15:33:25 +0200 |
|---|---|---|
| committer | Nico Huber <nico.h@gmx.de> | 2015-11-18 15:09:36 +0100 |
| commit | 240766af027a6f1f7c854eeea799965e30686ce7 (patch) | |
| tree | e5e1e90580c3323b40c9784fbef5e6ed5e1d865e | |
| parent | 9f1fbb9a3002e8d74d53d7973bd1c7e3d4879238 (diff) | |
| download | coreboot-240766af027a6f1f7c854eeea799965e30686ce7.tar.xz | |
nb/intel/sandybridge/northbridge: Initialize uma_memory_base in all cases
Issue observed:
Coreboot stops at: "Not enough MTRRs available!"
Test system:
* Gigabyte GA-B75M-D3H
* Intel Pentium CPU G2130
* ATI Radeon HD4780
Problem description:
In case the IGD does not claim VGA decode, the code path taken results
in an integer overflow as uma_memory_base isn't initialized.
The MTRR assignment will fail, because of invalid memory regions.
Problem solution:
Properly initialize uma_memory_base to prevent possible integer overflow.
Final testing results:
The system boots again with IGD not claiming VGA decode.
Change-Id: I025be23b1defb6155469a3eee66569e49a695e7f
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: http://review.coreboot.org/11918
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
| -rw-r--r-- | src/northbridge/intel/sandybridge/northbridge.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/northbridge/intel/sandybridge/northbridge.c b/src/northbridge/intel/sandybridge/northbridge.c index bfc5de85a5..1ebb81ec91 100644 --- a/src/northbridge/intel/sandybridge/northbridge.c +++ b/src/northbridge/intel/sandybridge/northbridge.c @@ -194,6 +194,7 @@ static void pci_domain_set_resources(device_t dev) printk(BIOS_DEBUG, "MEBASE 0x%llx\n", me_base); + uma_memory_base = tolud; tomk = tolud >> 10; if (me_base == tolud) { /* ME is from MEBASE-TOM */ |