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| author | Giacomo Gabrielli <Giacomo.Gabrielli@arm.com> | 2014-01-24 15:29:30 -0600 |
|---|---|---|
| committer | Giacomo Gabrielli <Giacomo.Gabrielli@arm.com> | 2014-01-24 15:29:30 -0600 |
| commit | aefe9cc624902fe26535028f86ba3a45f555bcf0 (patch) | |
| tree | 4d775f34b34eeafc0c596b95aa071cc52fb94283 /src/mem/cache/blk.hh | |
| parent | 7f835a59f1c342eb1c170973ad53c493cc38e978 (diff) | |
| download | gem5-aefe9cc624902fe26535028f86ba3a45f555bcf0.tar.xz | |
mem: Add support for a security bit in the memory system
This patch adds the basic building blocks required to support e.g. ARM
TrustZone by discerning secure and non-secure memory accesses.
Diffstat (limited to 'src/mem/cache/blk.hh')
| -rw-r--r-- | src/mem/cache/blk.hh | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/mem/cache/blk.hh b/src/mem/cache/blk.hh index 47cd305c0..c65498f07 100644 --- a/src/mem/cache/blk.hh +++ b/src/mem/cache/blk.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012 ARM Limited + * Copyright (c) 2012-2013 ARM Limited * All rights reserved. * * The license below extends only to copyright in the software and shall @@ -70,7 +70,9 @@ enum CacheBlkStatusBits { /** block was referenced */ BlkReferenced = 0x10, /** block was a hardware prefetch yet unaccessed*/ - BlkHWPrefetched = 0x20 + BlkHWPrefetched = 0x20, + /** block holds data from the secure memory space */ + BlkSecure = 0x40 }; /** @@ -263,6 +265,15 @@ class CacheBlk } /** + * Check if this block holds data from the secure memory space. + * @return True if the block holds data from the secure memory space. + */ + bool isSecure() const + { + return (status & BlkSecure) != 0; + } + + /** * Track the fact that a local locked was issued to the block. If * multiple LLs get issued from the same context we could have * redundant records on the list, but that's OK, as they'll all |