Hi All,
I am facing a problem that if a add a memory space using 'gDS->AddMemorySpace'
and then remove it using 'gDS->FreeMemorySpace' followed by
'gDS->RemoveMemorySpace'.
I can still see the entry of added memory space in the table shown by 'memmap'
command.
I enabled DEBUG_GCD and as per logs , the entry is removed from
GcdMemorySpaceMap , but when I run 'memmap' command which gets the memory map
using 'gBS->GetMemoryMap', I can see that entry for the added memory space is
still present. Steps and Logs are below for reference
Do I need to perform any other steps in order to cleanly remove the memory
space entry ?
Regards,
Wasim
Below are the steps and GCD debug logs.
Steps 1 : Add a memory space . We can see that an entry from system memory is
added.
Status = gDS->AddMemorySpace (
EfiGcdMemoryTypeSystemMemory,
FixedPcdGet64(PcdSystemMemoryExBase),
SystemMemoryExSize,
EFI_MEMORY_WC | EFI_MEMORY_WT |
EFI_MEMORY_WB
);
Logs:
GCD:AddMemorySpace(Base=0000008080000000,Length=0000000380000000)
GcdMemoryType = SystemMem
Capabilities = 000000000000000E
CoreConvertSpace 774
Status = Success
GCDMemType Range Capabilities Attributes
========== ================================= ================ ================
NonExist 0000000000000000-000000009FFFFFFF 0000000000000000 0000000000000000
SystemMem 00000000A0000000-00000000DFFFFFFF 800000000000000E 0000000000000008*
NonExist 00000000E0000000-00000000E01BFFFF 0000000000000000 0000000000000000
SystemMem 00000000E01C0000-00000000FFFFFFFF 800000000000000E 0000000000000008*
NonExist 0000000100000000-000000807FFFFFFF 0000000000000000 0000000000000000
SystemMem 0000008080000000-00000083FFFFFFFF 800000000000000E 0000000000000000
NonExist 0000008400000000-0000FFFFFFFFFFFF 0000000000000000 0000000000000000
GCD:AllocateMemorySpace(Base=0000008080000000,Length=0000000380000000)
GcdAllocateType = AtAddress
GcdMemoryType = SystemMem
Alignment = 0000000000001000
ImageHandle = FED1FF98
DeviceHandle = 0
Status = Success (BaseAddress = 0000008080000000)
GCDMemType Range Capabilities Attributes
========== ================================= ================ ================
NonExist 0000000000000000-000000009FFFFFFF 0000000000000000 0000000000000000
SystemMem 00000000A0000000-00000000DFFFFFFF 800000000000000E 0000000000000008*
NonExist 00000000E0000000-00000000E01BFFFF 0000000000000000 0000000000000000
SystemMem 00000000E01C0000-00000000FFFFFFFF 800000000000000E 0000000000000008*
NonExist 0000000100000000-000000807FFFFFFF 0000000000000000 0000000000000000
SystemMem 0000008080000000-00000083FFFFFFFF 800000000000000E 0000000000000000*
NonExist 0000008400000000-0000FFFFFFFFFFFF 0000000000000000 0000000000000000
Step2: Free the memory space
Status = gDS->FreeMemorySpace (
FixedPcdGet64(PcdSystemMemoryExBase),
SystemMemoryExSize
);
Logs:
GCD:FreeMemorySpace(Base=0000008080000000,Length=0000000380000000)
Status = Success
GCDMemType Range Capabilities Attributes
========== ================================= ================ ================
NonExist 0000000000000000-000000009FFFFFFF 0000000000000000 0000000000000000
SystemMem 00000000A0000000-00000000DFFFFFFF 800000000000000E 0000000000000008*
NonExist 00000000E0000000-00000000E01BFFFF 0000000000000000 0000000000000000
SystemMem 00000000E01C0000-00000000FFFFFFFF 800000000000000E 0000000000000008*
NonExist 0000000100000000-000000807FFFFFFF 0000000000000000 0000000000000000
SystemMem 0000008080000000-00000083FFFFFFFF 800000000000000E 0000000000000000
NonExist 0000008400000000-0000FFFFFFFFFFFF 0000000000000000 0000000000000000
Step3: Remove the memory space , As we can see that entry 'SystemMem
0000008080000000-00000083FFFFFFFF' is removed.
Status = gDS->RemoveMemorySpace (
FixedPcdGet64(PcdSystemMemoryExBase),
SystemMemoryExSize
);
Logs:
GCD:RemoveMemorySpace(Base=0000008080000000,Length=0000000380000000)
Status = Success
GCDMemType Range Capabilities Attributes
========== ================================= ================ ================
NonExist 0000000000000000-000000009FFFFFFF 0000000000000000 0000000000000000
SystemMem 00000000A0000000-00000000DFFFFFFF 800000000000000E 0000000000000008*
NonExist 00000000E0000000-00000000E01BFFFF 0000000000000000 0000000000000000
SystemMem 00000000E01C0000-00000000FFFFFFFF 800000000000000E 0000000000000008*
NonExist 0000000100000000-0000FFFFFFFFFFFF 0000000000000000 0000000000000000
Step4 : Run the 'memmap' command. As we can see that entry is still present.
Shell> memmap
Type Start End # Pages Attributes
Available 00000000A0000000-00000000DFFFFFFF 0000000000040000 000000000000000E
Available 00000000E01C0000-00000000E53C0FFF 0000000000005201 000000000000000E
BS_Data 00000000E53C1000-00000000E5D99FFF 00000000000009D9 000000000000000E
...
Available 0000008080000000-00000083FFFFFFFF 0000000000380000 000000000000000E
...
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