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-rw-r--r--src/mainboard/amd/persimmon/agesawrapper.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/mainboard/amd/persimmon/agesawrapper.c b/src/mainboard/amd/persimmon/agesawrapper.c
index e946a3bd0a..4e3819a6c6 100644
--- a/src/mainboard/amd/persimmon/agesawrapper.c
+++ b/src/mainboard/amd/persimmon/agesawrapper.c
@@ -138,7 +138,8 @@ agesawrapper_amdinitmmio (
Set the MMIO Configuration Base Address and Bus Range onto MMIO configuration base
Address MSR register.
*/
- MsrReg = CONFIG_MMCONF_BASE_ADDRESS | (8 << 2) | 1;
+
+ MsrReg = CONFIG_MMCONF_BASE_ADDRESS | (LibAmdBitScanReverse (CONFIG_MMCONF_BUS_NUMBER) << 2) | 1;
LibAmdMsrWrite (0xC0010058, &MsrReg, &StdHeader);
/*