diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/lib.rs | 35 |
1 files changed, 35 insertions, 0 deletions
@@ -60,7 +60,10 @@ mod tests { #[test] fn memory_rw() { + use std::rc::Rc; + use std::cell::RefCell; use memory::*; + let size = 0xFF; let mut memory = Memory::new(size); @@ -77,5 +80,37 @@ mod tests { assert_eq!(memory.write_word(address, 0xF0), Ok(())); assert_eq!(memory.read_word(address), Ok(0xF0)); } + + assert_eq!(memory.write_word(0x10, 0x01234567), Ok(())); + assert_eq!(memory.write_word(0x14, 0xDEADBEEF), Ok(())); + assert_eq!(memory.read_byte(0x10), Ok(0x67)); + assert_eq!(memory.read_byte(0x11), Ok(0x45)); + assert_eq!(memory.read_byte(0x12), Ok(0x23)); + assert_eq!(memory.read_byte(0x13), Ok(0x01)); + + let stall = memory.latency(); + let memory_box = Box::new(memory) as Box<MemoryInterface>; + let memory_ref = Rc::new(RefCell::new(memory_box)); + let mut dm_cache = DirectMappedCache::new(4, 4, memory_ref.clone()); + + assert_eq!(dm_cache.read_word(0x10), Err(MemoryError::CacheMiss { + stall_cycles: stall, + })); + + for _ in 0..100 { + dm_cache.step(); + } + + assert_eq!(dm_cache.read_word(0x10), Ok(0x01234567)); + assert_eq!(dm_cache.read_word(0x14), Ok(0xDEADBEEF)); + assert_eq!(dm_cache.read_word(0x18), Ok(0xF0)); + assert_eq!(dm_cache.read_word(0x1C), Ok(0xF0)); + assert_eq!(dm_cache.read_byte(0x10), Ok(0x67)); + assert_eq!(dm_cache.read_byte(0x11), Ok(0x45)); + assert_eq!(dm_cache.read_byte(0x12), Ok(0x23)); + assert_eq!(dm_cache.read_byte(0x13), Ok(0x01)); + assert_eq!(dm_cache.write_word(0x18, 0xBEEFBEEF), Ok(())); + assert_eq!(dm_cache.read_word(0x18), Ok(0xBEEFBEEF)); + assert_eq!(memory_ref.borrow_mut().read_word(0x18), Ok(0xBEEFBEEF)); } } |