diff options
| author | Olivier Martin <olivier.martin@arm.com> | 2013-09-02 13:13:29 +0000 |
|---|---|---|
| committer | oliviermartin <oliviermartin@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-09-02 13:13:29 +0000 |
| commit | db06c2d723ac981e4e54b5d6dd410cb23621517c (patch) | |
| tree | e76d6e770a933d2b59b59ddc9e4e72cda119dc3e /ArmPkg/Library | |
| parent | b75d7605b4c09d5d431c2d57f70341c2f43de3c3 (diff) | |
| download | edk2-platforms-db06c2d723ac981e4e54b5d6dd410cb23621517c.tar.xz | |
ArmPkg/ArmDmaLib: Fixed the calculation of the Base Address of the Buffer
The former calculation 'ALIGN_VALUE(*DeviceAddress - BASE_4KB - 1,BASE_4KB)' did
not return the lowest aligned address.
Example:
*DeviceAddress = 0xB000C001;
*DeviceAddress - BASE_4KB - 1 = 0xB000B000;
Aligned value = 0xB000B000 + ((0x1000 - 0xB000B000)) & 0xFFF) = 0xB000B000
... while we where expected 0xB000C000.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14618 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg/Library')
| -rwxr-xr-x | ArmPkg/Library/ArmDmaLib/ArmDmaLib.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ArmPkg/Library/ArmDmaLib/ArmDmaLib.c b/ArmPkg/Library/ArmDmaLib/ArmDmaLib.c index 074e3c1255..e803304295 100755 --- a/ArmPkg/Library/ArmDmaLib/ArmDmaLib.c +++ b/ArmPkg/Library/ArmDmaLib/ArmDmaLib.c @@ -131,7 +131,7 @@ DmaMap ( if ((Operation == MapOperationBusMasterRead) || (Operation == MapOperationBusMasterCommonBuffer)) {
// In case the buffer is used for instance to send command to a PCI controller, we must ensure the memory is uncached
- Status = gDS->SetMemorySpaceAttributes (ALIGN_VALUE(*DeviceAddress - BASE_4KB - 1,BASE_4KB), ALIGN_VALUE(*NumberOfBytes,BASE_4KB), EFI_MEMORY_WC);
+ Status = gDS->SetMemorySpaceAttributes (*DeviceAddress & ~(BASE_4KB - 1), ALIGN_VALUE (*NumberOfBytes, BASE_4KB), EFI_MEMORY_WC);
ASSERT_EFI_ERROR (Status);
}
}
|