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audk/UefiPayloadPkg/Library/BaseSerialPortLibHob
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PaytonX Hsieh 23c71536ef UefiPayloadPkg: Fix issues when MULTIPLE_DEBUG_PORT_SUPPORT is true 
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4427

1. Since UART speed is slower than CPU, BIOS need to check the write
   buffer is empty, to avoid overwrite the buffer content.
2. LPSS UART might disable MMIO space for Windows debug usage during
   ExitBootServices event. BIOS need to avoid access the MMIO space
   after ExitBootServices.

Cc: Guo Dong <guo.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Sean Rhodes <sean@starlabs.systems>
Cc: James Lu <james.lu@intel.com>
Reviewed-by: Gua Guo <gua.guo@intel.com>
Signed-off-by: PaytonX Hsieh <paytonx.hsieh@intel.com>
 		2023-05-02 07:11:21 +00:00
..
BaseSerialPortLibHob.c UefiPayloadPkg: Fix issues when MULTIPLE_DEBUG_PORT_SUPPORT is true 2023-05-02 07:11:21 +00:00
BaseSerialPortLibHob.inf
…
DxeBaseSerialPortLibHob.c UefiPayloadPkg: Fix issues when MULTIPLE_DEBUG_PORT_SUPPORT is true 2023-05-02 07:11:21 +00:00
DxeBaseSerialPortLibHob.inf UefiPayloadPkg: Fix issues when MULTIPLE_DEBUG_PORT_SUPPORT is true 2023-05-02 07:11:21 +00:00