diff options
Diffstat (limited to 'inc/dram.h')
| -rw-r--r-- | inc/dram.h | 48 |
1 files changed, 20 insertions, 28 deletions
@@ -5,6 +5,15 @@ #include <functional> #include <ostream> +// clang-format off +/** + * Ensures address is within the current memory size using a clean wrap. + * @param an address + */ +#define WRAP_ADDRESS(a) \ + ((a < 0) ? ((a % MEM_WORDS) + MEM_WORDS) % MEM_WORDS : a % MEM_WORDS) +// clang-format on + class Dram : public Storage { public: @@ -16,42 +25,25 @@ class Dram : public Storage Dram(int delay); ~Dram(); - int - write_word(void *, signed int, int) override; - int - write_line(void *, std::array<signed int, LINE_SIZE>, int) override; - int - read_word(void *, int, signed int &) override; - int - read_line(void *, int, std::array<signed int, LINE_SIZE> &) override; + int write_word(void *, signed int, int) override; + int write_line(void *, std::array<signed int, LINE_SIZE>, int) override; + int read_word(void *, int, signed int &) override; + int read_line(void *, int, std::array<signed int, LINE_SIZE> &) override; /** * TODO This will accept a file at a later date. */ - void - load(std::vector<signed int> program); + void load(std::vector<signed int> program); private: + int process(void *id, int address, std::function<void(int line, int word)> request_handler) override; /** - * Helper for all access methods. - * Calls `request_handler` when `id` is allowed to complete its - * request cycle. - * @param the source making the request - * @param the address to write to - * @param the function to call when an access should be completed - * @return 1 if the access completed successfully, 0 otherwise - */ - int - process(void *id, int address, std::function<void(int line, int word)> request_handler); - /** - * Returns OK if `id` is allowed to complete its request this cycle. - * Handles wait times, side door, and setting the current id this - * storage is serving. - * @param the source making the request - * @return 1 if the access can be completed this function call, 0 otherwise + * Given `address`, returns the line and word it is in. + * @param an address + * @param the line (row) `address` is in + * @param the word (column) `address` corresponds to */ - int - is_access_cleared(void *id); + void get_memory_index(int address, int &line, int &word); }; #endif /* DRAM_H_INCLUDED */ |