aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorDavid Li <li.davidm96@gmail.com>2016-01-10 10:13:40 -0700
committerDavid Li <li.davidm96@gmail.com>2016-01-10 10:13:40 -0700
commit70ef4cc988e7daa240d331082e566add286089ab (patch)
tree0a5d49986a010d643418f6ad7d4819b83747c4ac
parentc8e241211445db065745c0e171c3b00e1aff5431 (diff)
Give individual cores secondary cache access
-rw-r--r--TODO.md1
-rw-r--r--src/main.rs13
-rw-r--r--src/shareable_cache.rs26
3 files changed, 25 insertions, 15 deletions
diff --git a/TODO.md b/TODO.md
index 1ffd873..2aca194 100644
--- a/TODO.md
+++ b/TODO.md
@@ -19,6 +19,7 @@ https://git.lidavidm.me/cacheracer/.
- [ ] Make sure `ReverseMmu` maps addresses correctly (i.e. 0x0 should
map to an actual array element)
+- [ ] Sneak attack/retreat needs to be per-core
- [ ] Implement global data structures
- [ ] Player status
- [ ] Core status
diff --git a/src/main.rs b/src/main.rs
index c7ee66f..2f607a6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -87,17 +87,25 @@ fn main() {
let cache2_ref = Rc::new(RefCell::new(cache2));
let (cache1, cache2) = ShareableCache::new(cache_ref.clone(), cache2_ref.clone());
+ let mut core_caches = vec![];
let mut cores = vec![];
for i in 0..4 {
+ let c1 = Rc::new(RefCell::new(cache1.clone()));
+ core_caches.push(c1.clone());
let mut core = simulator::Core::new(
- i, start1, (0x100000 * (i + 1)) as u32, cache1.clone(),
+ i, start1, (0x100000 * (i + 1)) as u32, c1,
Box::new(memory::IdentityMmu::new())
);
core.registers().write_word(isa::Register::X10, i as isa::Word);
cores.push(core);
+ }
+
+ for i in 4..8 {
+ let c2 = Rc::new(RefCell::new(cache2.clone()));
+ core_caches.push(c2.clone());
let mut core = simulator::Core::new(
- i, start2, (0x100000 * (i + 1)) as u32, cache2.clone(),
+ i, start2, (0x100000 * (i + 1)) as u32, c2,
Box::new(memory::ReverseMmu::new(0x4000000))
);
core.registers().write_word(isa::Register::X10, i as isa::Word);
@@ -105,7 +113,6 @@ fn main() {
}
let steppable_caches = vec![cache_ref.clone() as memory::SharedMemory, cache2_ref];
- let core_caches = vec![cache1, cache2];
let system = SyscallHandler::new(memory_ref.clone(), core_caches);
let mut simulator = simulator::Simulator::new(
cores, memory_ref.clone(), steppable_caches, system);
diff --git a/src/shareable_cache.rs b/src/shareable_cache.rs
index a8fee51..09d514f 100644
--- a/src/shareable_cache.rs
+++ b/src/shareable_cache.rs
@@ -1,6 +1,3 @@
-use std::cell::RefCell;
-use std::rc::Rc;
-
use rustv::isa;
use rustv::memory::{MemoryInterface, Result, SharedMemory};
@@ -8,8 +5,6 @@ use rustv::memory::{MemoryInterface, Result, SharedMemory};
/// set-associative cache.
#[derive(Clone)]
pub struct ShareableCache<'a> {
- // The idea is to create two separate ShareableCaches, one for
- // each player.
primary: SharedMemory<'a>,
secondary: SharedMemory<'a>,
secondary_enabled: bool,
@@ -18,19 +13,19 @@ pub struct ShareableCache<'a> {
impl<'a> ShareableCache<'a> {
pub fn new(cache1: SharedMemory<'a>, cache2: SharedMemory<'a>)
- -> (Rc<RefCell<ShareableCache<'a>>>,
- Rc<RefCell<ShareableCache<'a>>>) {
- (Rc::new(RefCell::new(ShareableCache {
+ -> (ShareableCache<'a>,
+ ShareableCache<'a>) {
+ (ShareableCache {
primary: cache1.clone(),
secondary: cache2.clone(),
secondary_enabled: false,
use_secondary: false,
- })), Rc::new(RefCell::new(ShareableCache {
+ }, ShareableCache {
primary: cache2.clone(),
secondary: cache1.clone(),
secondary_enabled: false,
use_secondary: false,
- })))
+ })
}
pub fn enable_secondary(&mut self) {
@@ -86,10 +81,17 @@ impl<'a> MemoryInterface for ShareableCache<'a> {
fn write_word(&mut self, address: isa::Address, value: isa::Word) -> Result<()> {
if self.secondary_enabled {
- if self.primary.borrow().is_address_accessible(address) {
+ let primary_accessible = {
+ self.primary.borrow().is_address_accessible(address)
+ };
+ let secondary_accessible = {
+ self.secondary.borrow().is_address_accessible(address)
+ };
+
+ if primary_accessible {
self.primary.borrow_mut().write_word(address, value)
}
- else if self.secondary.borrow().is_address_accessible(address) {
+ else if secondary_accessible {
self.secondary.borrow_mut().write_word(address, value)
}
else {