diff options
| author | bd <bdunahu@operationnull.com> | 2025-03-11 20:26:59 -0400 |
|---|---|---|
| committer | bd <bdunahu@operationnull.com> | 2025-03-11 20:26:59 -0400 |
| commit | c55104f8e99ea6ccb0c66a5e0d3cfc81dbbc19ab (patch) | |
| tree | 30947c7018653ca18d4a69de20936b3615768f9e | |
| parent | 1400c65a1d19f96fff8b4a0e98fcd9ed792f4883 (diff) | |
Fix small issue in fetch_resource wih off by one cycle count
| -rw-r--r-- | inc/definitions.h | 2 | ||||
| -rw-r--r-- | src/storage/cache.cc | 11 |
2 files changed, 7 insertions, 6 deletions
diff --git a/inc/definitions.h b/inc/definitions.h index 80fccbe..eced554 100644 --- a/inc/definitions.h +++ b/inc/definitions.h @@ -39,7 +39,7 @@ /** * The total number of cycles a level one cache access takes */ -#define L1_CACHE_DELAY 1 +#define L1_CACHE_DELAY 0 /** * Return the N least-significant bits from integer K using a bit mask diff --git a/src/storage/cache.cc b/src/storage/cache.cc index 4842ed5..3e2a5e0 100644 --- a/src/storage/cache.cc +++ b/src/storage/cache.cc @@ -119,6 +119,7 @@ Response Cache::read_word(Accessor accessor, int address, signed int &data) void Cache::fetch_resource(int expected) { Response r = OK; + Response q; int tag, index, offset; std::array<signed int, LINE_SIZE> *actual; std::array<int, 2> *meta; @@ -128,21 +129,21 @@ void Cache::fetch_resource(int expected) actual = &this->data->at(index); if (meta->at(0) != tag) { + r = WAIT; // address not in cache if (meta->at(1) >= 0) { // occupant is dirty // writing line to DRam in case of dirty cache eviction - r = this->lower->write_line( + q = this->lower->write_line( L1CACHE, *actual, ((index << LINE_SPEC) + (meta->at(0) << (L1_CACHE_LINE_SPEC + LINE_SPEC)))); - if (r == OK) { + if (q == OK) { meta->at(1) = -1; - r = WAIT; } } else { - r = this->lower->read_line(L1CACHE, expected, *actual); - if (r == OK) { + q = this->lower->read_line(L1CACHE, expected, *actual); + if (q == OK) { meta->at(0) = tag; } } |