diff options
Diffstat (limited to 'inc')
| -rw-r--r-- | inc/cache.h | 7 | ||||
| -rw-r--r-- | inc/dram.h | 8 | ||||
| -rw-r--r-- | inc/storage.h | 14 |
3 files changed, 24 insertions, 5 deletions
diff --git a/inc/cache.h b/inc/cache.h index 4e4b48d..a317f5d 100644 --- a/inc/cache.h +++ b/inc/cache.h @@ -28,6 +28,13 @@ class Cache : public Storage private: /** + * Fetches `address` from a lower level of storage if it is not already + * present. If it is not, temporarily sets the is_blocked attribute of this + * cache level to true. + * @param the address that must be present in cache. + */ + void fetch_resource(int address); + /** * An array of paired bits. * If the least significant bit of an element is set, the corresponding * element in `data` is invalid. If the most significant bit of an element @@ -19,7 +19,15 @@ class Dram : public Storage Response read(Accessor accessor, int address, std::array<signed int, LINE_SIZE>& data) override; private: + /** + * Helper for `write`. + */ + void do_write(signed int, int); + /** + * Helper for `read`. + */ void do_read(std::array<signed int, LINE_SIZE>& data_line, int address); }; #endif /* DRAM_H_INCLUDED */ + diff --git a/inc/storage.h b/inc/storage.h index 1fb41b0..9707041 100644 --- a/inc/storage.h +++ b/inc/storage.h @@ -32,7 +32,10 @@ class Storage * @return a status code reflecting the state of the request, and the * data being returned. */ - virtual Response read(Accessor accessor, int address, std::array<signed int, LINE_SIZE>& data) = 0; + virtual Response read( + Accessor accessor, + int address, + std::array<signed int, LINE_SIZE> &data) = 0; /** * Sidedoor view of `lines` of memory starting at `base`. * @param The base line to start getting memory from. @@ -48,10 +51,6 @@ class Storage protected: /** - * Helper for `write`. - */ - void do_write(signed int, int); - /** * The data currently stored in this level of storage. */ std::vector<std::array<signed int, LINE_SIZE>> *data; @@ -73,6 +72,11 @@ class Storage * The number of cycles until the current request is completed. */ int wait_time; + /** + * A flag indicating whether this level of storage is currently blocked by a + * lower level. + */ + int is_blocked; }; #endif /* STORAGE_H_INCLUDED */ |