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| author | joe <37425738+JoeLopez333@users.noreply.github.com> | 2023-07-24 10:19:22 -0700 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-08-04 09:21:06 +0000 |
| commit | 5ff99e0dabefea14b04e190c1659f4817fcb7bc0 (patch) | |
| tree | e547729b949c8c4e9aceb6d7b5b0cc4c867fac14 /ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.inf | |
| parent | 159f1aee56d270d2575e50eb2af077abe182fc9b (diff) | |
| download | edk2-master.zip edk2-master.tar.gz edk2-master.tar.bz2 | |
The flag for HTTU override in an SMMUv3 node in the IORT table is
defined in MdePkg/Include/IndustryStandard/IoRemappingTable.h as
a single bit. BIT0 or BIT1. The implementation of this field is
actually two bits, with the following mapings:
0b0000: Hardware update of the Access flag and dirty state are not
supported.
0b0001: Support for hardware update of the Access flag for Block and
Page descriptors.
0b0010: As 0b0001, and adds support for hardware update of the Access
flag for Block and Page descriptors. Hardware update of dirty state is
supported.
Referenced in Arm® System Memory Management Unit Architecture Specification
SMMU architecture version 3:
https://documentation-service.arm.com/static/63d7a2d5e4378a55c5e045b9
Signed-off-by: Aaron Pop <aaronpop@microsoft.com>
Diffstat (limited to 'ArmPlatformPkg/Library/SP804TimerLib/SP804TimerLib.inf')
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