diff options
Diffstat (limited to 'ArmPlatformPkg')
| -rw-r--r-- | ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c | 10 | ||||
| -rw-r--r-- | ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf | 1 |
2 files changed, 8 insertions, 3 deletions
diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c index 801990d955..f1015b1fce 100644 --- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c +++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.c @@ -78,10 +78,14 @@ PL011UartInitializePort ( UINT32 Integer;
UINT32 Fractional;
UINT32 HardwareFifoDepth;
+ UINT32 UartPid2;
+
+ HardwareFifoDepth = FixedPcdGet16 (PcdUartDefaultReceiveFifoDepth);
+ if (HardwareFifoDepth == 0) {
+ UartPid2 = MmioRead32 (UartBase + UARTPID2);
+ HardwareFifoDepth = (PL011_UARTPID2_VER (UartPid2) > PL011_VER_R1P4) ? 32 : 16;
+ }
- HardwareFifoDepth = (PL011_UARTPID2_VER (MmioRead32 (UartBase + UARTPID2)) \
- > PL011_VER_R1P4) \
- ? 32 : 16 ;
// The PL011 supports a buffer of 1, 16 or 32 chars. Therefore we can accept
// 1 char buffer as the minimum FIFO size. Because everything can be rounded
// down, there is no maximum FIFO size.
diff --git a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf index d99e89fe00..e3da507988 100644 --- a/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf +++ b/ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf @@ -30,6 +30,7 @@ ArmPlatformPkg/ArmPlatformPkg.dec
[FixedPcd]
+ gEfiMdePkgTokenSpaceGuid.PcdUartDefaultReceiveFifoDepth
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialBaudRate
gArmPlatformTokenSpaceGuid.PL011UartInteger
|