diff options
| author | Angel Pons <th3fanbus@gmail.com> | 2020-10-23 11:00:14 +0200 |
|---|---|---|
| committer | Angel Pons <th3fanbus@gmail.com> | 2020-10-24 20:47:17 +0000 |
| commit | 8cc39a5fae28c02d344b2401bb489898f369929f (patch) | |
| tree | 4ebe9106062e999270e8631f3ed1147118c4c5e9 /src/northbridge/intel/haswell | |
| parent | 97f0d81503be2053a544e80b61732ff5d5479ef0 (diff) | |
nb/intel/haswell/finalize.c: Lock down MC ARB register
The Haswell System Agent BIOS Spec revision 0.6.0 indicates this
register needs to be locked, and Broadwell already locks it.
Tested on Asrock B85M Pro4, still boots and register is locked.
Change-Id: Icdeb39e2fdde1403b6ab83faed214addca863f4b
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46680
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/northbridge/intel/haswell')
| -rw-r--r-- | src/northbridge/intel/haswell/finalize.c | 1 | ||||
| -rw-r--r-- | src/northbridge/intel/haswell/registers/mchbar.h | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/src/northbridge/intel/haswell/finalize.c b/src/northbridge/intel/haswell/finalize.c index efbaf68074..1c83110a60 100644 --- a/src/northbridge/intel/haswell/finalize.c +++ b/src/northbridge/intel/haswell/finalize.c @@ -24,6 +24,7 @@ void intel_northbridge_haswell_finalize_smm(void) MCHBAR32_OR(REQLIM, 1UL << 31); MCHBAR32_OR(DMIVCLIM, 1UL << 31); MCHBAR32_OR(CRDTLCK, 1 << 0); + MCHBAR32_OR(MCARBLCK, 1 << 0); /* Memory Controller Lockdown */ MCHBAR8(MC_LOCK) = 0x8f; diff --git a/src/northbridge/intel/haswell/registers/mchbar.h b/src/northbridge/intel/haswell/registers/mchbar.h index bd99cee585..97ae433412 100644 --- a/src/northbridge/intel/haswell/registers/mchbar.h +++ b/src/northbridge/intel/haswell/registers/mchbar.h @@ -47,5 +47,6 @@ #define REQLIM 0x6800 #define DMIVCLIM 0x7000 #define CRDTLCK 0x77fc +#define MCARBLCK 0x7ffc #endif /* __HASWELL_REGISTERS_MCHBAR_H__ */ |