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/** @file
I/O Library MMIO Buffer Functions.
The implementations are based on EFI_PEI_SERVICE->CpuIo interface.
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <PiPei.h>
#include <Library/IoLib.h>
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/PeiServicesTablePointerLib.h>
/**
Copy data from MMIO region to system memory by using 8-bit access.
Copy data from MMIO region specified by starting address StartAddress
to system memory specified by Buffer by using 8-bit access. The total
number of byte to be copied is specified by Length. Buffer is returned.
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied from.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer receiving the data read.
@return Buffer
**/
UINT8 *
EFIAPI
MmioReadBuffer8 (
IN UINTN StartAddress,
IN UINTN Length,
OUT UINT8 *Buffer
)
{
UINT8 *ReturnBuffer;
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ReturnBuffer = Buffer;
while (Length-- != 0) {
*(Buffer++) = MmioRead8 (StartAddress++);
}
return ReturnBuffer;
}
/**
Copy data from MMIO region to system memory by using 16-bit access.
Copy data from MMIO region specified by starting address StartAddress
to system memory specified by Buffer by using 16-bit access. The total
number of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
If Length is not aligned on a 16-bit boundary, then ASSERT().
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied from.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer receiving the data read.
@return Buffer
**/
UINT16 *
EFIAPI
MmioReadBuffer16 (
IN UINTN StartAddress,
IN UINTN Length,
OUT UINT16 *Buffer
)
{
UINT16 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT16) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT16) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT16) - 1)) == 0);
ReturnBuffer = Buffer;
while (Length != 0) {
*(Buffer++) = MmioRead16 (StartAddress);
StartAddress += sizeof (UINT16);
Length -= sizeof (UINT16);
}
return ReturnBuffer;
}
/**
Copy data from MMIO region to system memory by using 32-bit access.
Copy data from MMIO region specified by starting address StartAddress
to system memory specified by Buffer by using 32-bit access. The total
number of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
If Length is not aligned on a 32-bit boundary, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied from.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer receiving the data read.
@return Buffer
**/
UINT32 *
EFIAPI
MmioReadBuffer32 (
IN UINTN StartAddress,
IN UINTN Length,
OUT UINT32 *Buffer
)
{
UINT32 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT32) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT32) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT32) - 1)) == 0);
ReturnBuffer = Buffer;
while (Length != 0) {
*(Buffer++) = MmioRead32 (StartAddress);
StartAddress += sizeof (UINT32);
Length -= sizeof (UINT32);
}
return ReturnBuffer;
}
/**
Copy data from MMIO region to system memory by using 64-bit access.
Copy data from MMIO region specified by starting address StartAddress
to system memory specified by Buffer by using 64-bit access. The total
number of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
If Length is not aligned on a 64-bit boundary, then ASSERT().
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied from.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer receiving the data read.
@return Buffer
**/
UINT64 *
EFIAPI
MmioReadBuffer64 (
IN UINTN StartAddress,
IN UINTN Length,
OUT UINT64 *Buffer
)
{
UINT64 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT64) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT64) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT64) - 1)) == 0);
ReturnBuffer = Buffer;
while (Length != 0) {
*(Buffer++) = MmioRead64 (StartAddress);
StartAddress += sizeof (UINT64);
Length -= sizeof (UINT64);
}
return ReturnBuffer;
}
/**
Copy data from system memory to MMIO region by using 8-bit access.
Copy data from system memory specified by Buffer to MMIO region specified
by starting address StartAddress by using 8-bit access. The total number
of byte to be copied is specified by Length. Buffer is returned.
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied to.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer containing the data to write.
@return Buffer
**/
UINT8 *
EFIAPI
MmioWriteBuffer8 (
IN UINTN StartAddress,
IN UINTN Length,
IN CONST UINT8 *Buffer
)
{
VOID *ReturnBuffer;
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ReturnBuffer = (UINT8 *)Buffer;
while (Length-- != 0) {
MmioWrite8 (StartAddress++, *(Buffer++));
}
return ReturnBuffer;
}
/**
Copy data from system memory to MMIO region by using 16-bit access.
Copy data from system memory specified by Buffer to MMIO region specified
by starting address StartAddress by using 16-bit access. The total number
of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
If Length is not aligned on a 16-bit boundary, then ASSERT().
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied to.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer containing the data to write.
@return Buffer
**/
UINT16 *
EFIAPI
MmioWriteBuffer16 (
IN UINTN StartAddress,
IN UINTN Length,
IN CONST UINT16 *Buffer
)
{
UINT16 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT16) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT16) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT16) - 1)) == 0);
ReturnBuffer = (UINT16 *)Buffer;
while (Length != 0) {
MmioWrite16 (StartAddress, *(Buffer++));
StartAddress += sizeof (UINT16);
Length -= sizeof (UINT16);
}
return ReturnBuffer;
}
/**
Copy data from system memory to MMIO region by using 32-bit access.
Copy data from system memory specified by Buffer to MMIO region specified
by starting address StartAddress by using 32-bit access. The total number
of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
If Length is not aligned on a 32-bit boundary, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied to.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer containing the data to write.
@return Buffer
**/
UINT32 *
EFIAPI
MmioWriteBuffer32 (
IN UINTN StartAddress,
IN UINTN Length,
IN CONST UINT32 *Buffer
)
{
UINT32 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT32) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT32) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT32) - 1)) == 0);
ReturnBuffer = (UINT32 *)Buffer;
while (Length != 0) {
MmioWrite32 (StartAddress, *(Buffer++));
StartAddress += sizeof (UINT32);
Length -= sizeof (UINT32);
}
return ReturnBuffer;
}
/**
Copy data from system memory to MMIO region by using 64-bit access.
Copy data from system memory specified by Buffer to MMIO region specified
by starting address StartAddress by using 64-bit access. The total number
of byte to be copied is specified by Length. Buffer is returned.
If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
If Length is not aligned on a 64-bit boundary, then ASSERT().
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
@param StartAddress The starting address for the MMIO region to be copied to.
@param Length The size, in bytes, of Buffer.
@param Buffer The pointer to a system memory buffer containing the data to write.
@return Buffer
**/
UINT64 *
EFIAPI
MmioWriteBuffer64 (
IN UINTN StartAddress,
IN UINTN Length,
IN CONST UINT64 *Buffer
)
{
UINT64 *ReturnBuffer;
ASSERT ((StartAddress & (sizeof (UINT64) - 1)) == 0);
ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
ASSERT ((Length & (sizeof (UINT64) - 1)) == 0);
ASSERT (((UINTN)Buffer & (sizeof (UINT64) - 1)) == 0);
ReturnBuffer = (UINT64 *)Buffer;
while (Length != 0) {
MmioWrite64 (StartAddress, *(Buffer++));
StartAddress += sizeof (UINT64);
Length -= sizeof (UINT64);
}
return ReturnBuffer;
}
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