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MdeModulePkg: BaseSerialPortLib16550: Add Mmio32 support

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Some buses doesn't allow 8 bit MMIO read/write, this adds support for
32 bits read/write

Signed-off-by: "Tien Hock, Loh" <tien.hock.loh@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>
This commit is contained in:
Tien Hock, Loh
2019-04-26 14:26:44 +08:00
committed by Hao Wu
parent 679906d9bd
commit 8a472b1915
3 changed files with 20 additions and 4 deletions
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7
MdeModulePkg/MdeModulePkg.dec
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@@ -1170,6 +1170,13 @@
# @Prompt Serial port registers use MMIO.
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialUseMmio|FALSE|BOOLEAN|0x00020000
## Indicates the access width for 16550 serial port registers.
# Default is 8-bit access mode.<BR><BR>
# 8 - 16550 serial port registers are accessed in 8-bit width.<BR>
# 32 - 16550 serial port registers are accessed in 32-bit width.<BR>
# @Prompt Serial port register access width.
gEfiMdeModulePkgTokenSpaceGuid.PcdSerialRegisterAccessWidth|8|UINT8|0x00020007
## Indicates if the 16550 serial port hardware flow control will be enabled. Default is FALSE.<BR><BR>
# TRUE - 16550 serial port hardware flow control will be enabled.<BR>
# FALSE - 16550 serial port hardware flow control will be disabled.<BR>