add comments for protocol/print.h and retire ReadOnlyVariableThunkPresent
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8107 6f19259b-4bc3-4df7-8a09-765794883524
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@@ -22,7 +22,23 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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typedef struct _ECP_PEI_PCI_CFG_PPI ECP_PEI_PCI_CFG_PPI;
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/**
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PCI read and write operation.
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Write to/read from a given location in the PCI configuration space.
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@param PeiServices An indirect pointer to the PEI Services Table published by the PEI Foundation.
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@param This Pointer to local data for the interface.
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@param Width The width of the access. Enumerated in bytes.
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See EFI_PEI_PCI_CFG_PPI_WIDTH above.
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@param Address The physical address of the access. The format of
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the address is described by EFI_PEI_PCI_CFG_PPI_PCI_ADDRESS.
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@param Buffer A pointer to the buffer of data..
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@retval EFI_SUCCESS The function completed successfully.
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@retval EFI_DEVICE_ERROR There was a problem with the transaction.
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@retval EFI_DEVICE_NOT_READY The device is not capable of supporting the operation at this
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time.
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**/
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typedef
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EFI_STATUS
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(EFIAPI *ECP_PEI_PCI_CFG_PPI_IO) (
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@@ -33,6 +49,16 @@ EFI_STATUS
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IN OUT VOID *Buffer
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);
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/**
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The ECP_PEI_PCI_CFG_PPI interfaces are used to abstract accesses to PCI
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controllers behind a PCI root bridge controller.
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@param Read
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PCI read services. See the Read() function description.
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@param Write
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PCI write services. See the Write() function description.
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**/
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struct _ECP_PEI_PCI_CFG_PPI {
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ECP_PEI_PCI_CFG_PPI_IO Read;
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ECP_PEI_PCI_CFG_PPI_IO Write;
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