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| author | Uri Wiener <uri.wiener@arm.com> | 2013-04-22 13:20:33 -0400 |
|---|---|---|
| committer | Uri Wiener <uri.wiener@arm.com> | 2013-04-22 13:20:33 -0400 |
| commit | a8fbfefb5e0fd3b45d6961b07a172018c87c0251 (patch) | |
| tree | dbc13a043ab0c0daa0da3913ee349c933fc94ac6 /src/mem/cache/blk.hh | |
| parent | 9929e884b6fe6567c3bd2fe2dd3bba85d4e9bbd1 (diff) | |
| download | gem5-a8fbfefb5e0fd3b45d6961b07a172018c87c0251.tar.xz | |
mem: Adding verbose debug output in the memory system
This patch provides useful printouts throughut the memory system. This
includes pretty-printed cache tags and function call messages
(call-stack like).
Diffstat (limited to 'src/mem/cache/blk.hh')
| -rw-r--r-- | src/mem/cache/blk.hh | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/src/mem/cache/blk.hh b/src/mem/cache/blk.hh index 80216ff89..4a89f3892 100644 --- a/src/mem/cache/blk.hh +++ b/src/mem/cache/blk.hh @@ -289,6 +289,42 @@ class CacheBlk } /** + * Pretty-print a tag, and interpret state bits to readable form + * including mapping to a MOESI stat. + * + * @return string with basic state information + */ + std::string print() const + { + /** + * state M O E S I + * writable 1 0 1 0 0 + * dirty 1 1 0 0 0 + * valid 1 1 1 1 0 + * + * state writable dirty valid + * M 1 1 1 + * O 0 1 1 + * E 1 0 1 + * S 0 0 1 + * I 0 0 0 + **/ + unsigned state = isWritable() << 2 | isDirty() << 1 | isValid(); + char s = '?'; + switch (state) { + case 0b111: s = 'M'; break; + case 0b011: s = 'O'; break; + case 0b101: s = 'E'; break; + case 0b001: s = 'S'; break; + case 0b000: s = 'I'; break; + default: s = 'T'; break; // @TODO add other types + } + return csprintf("state: %x (%c) valid: %d writable: %d readable: %d " + "dirty: %d tag: %x data: %x", status, s, isValid(), + isWritable(), isReadable(), isDirty(), tag, *data); + } + + /** * Handle interaction of load-locked operations and stores. * @return True if write should proceed, false otherwise. Returns * false only in the case of a failed store conditional. |