On Fri, Mar 15, 2024 at 06:19:12PM +0800, Chao Li wrote: > Hi Gerd, > > > Thanks, > Chao > On 2024/3/15 17:36, Gerd Hoffmann wrote: > > On Mon, Mar 11, 2024 at 05:39:08PM +0800, Chao Li wrote: > > > Add a early serial port output library into LoongArchVirt that named > > > EarlyFdtSerialPortLib16550, this library is referenced from > > > MdeModulePkg. > > Why create your own copy? What are the differences to > > MdeModulePkg/Library/BaseSerialPortLib16550? > This library is used in the PEI stage, same as the Hook Library, LoongArch > QEMU is runs on flash in PEI stage, MdeModule version does not support to > get the SerialRegisterBase via registers or HOB or FDT,
It uses PcdSerialRegisterBase. Having a quick look at the PCD code it looks like the PCD are stored in in a HOB (gPcdDataBaseHobGuid), so setting dynamic PCDs should work even when running directly from flash. take care, Gerd -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#116807): https://edk2.groups.io/g/devel/message/116807 Mute This Topic: https://groups.io/mt/104859894/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
