amd/stoneyridge: Convert BiosRam access to MMIO

Change the BiosRam read/write functions to use the fixed MMIO range at
0xfed80500.  This is faster than two accesses per byte when using I/O

Note that BiosRam may only be accessed byte-by-byte.  It does not decode

Change-Id: I9d8baf2bd5d9d48a87bddfb6a0b86e292a8fdf7d
Signed-off-by: Marshall Dawson <>
Reviewed-by: Aaron Durbin <>
Tested-by: build bot (Jenkins) <>
Reviewed-by: Kyösti Mälkki <>
2 files changed