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mmu_(read/write)_mem impl

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This commit is contained in:
Moysan Gabriel 2023-03-15 12:17:37 +01:00
parent 9c3501eb40
commit 539b3f6802
1 changed files with 51 additions and 4 deletions
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53
src/simulator/mmu.rs
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@ -18,23 +18,70 @@ impl <'a>MMU <'_>{
}
}
pub fn mmu_read_mem(mmu : &mut MMU, machine : &Machine, virt_addr : u64, value : &mut u64) -> bool {
pub fn mmu_read_mem(mmu : &mut MMU, machine : &mut Machine, virt_addr : u64, value : &mut u64, size : i32) -> bool {
//Pour plus tard eventuellement considerer le boutisme de notre mémoire
//Peut etre pas si on fixe cela en BIG ENDIAN (octects poids fort au debut)
let mut phy_addr : u64 = 0;
let mut phy_addr_double_check : u64 = 0;
let exc = MMU::translate(mmu, virt_addr, &mut phy_addr, false);
MMU::translate(mmu, virt_addr, &mut phy_addr_double_check, false);
//PB ICI car double appel a translate et on doit a chaque appel passer mmu en param
match exc {
ExceptionType::NO_EXCEPTION => {
if phy_addr != phy_addr_double_check {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_read_mem :: phy_addr != phy_addr_double_check");
return false;
}
else {
*value = Machine::read_memory(machine, size, phy_addr as usize);
return true;
}
}
_ => {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_read_mem :: Exception different from NO_EXCEPTION");
return false;
}
}
true
}
pub fn mmu_write_mem(&mut self, machine : &mut Machine, virt_addr : u64, value : &mut u64) -> bool {
pub fn mmu_write_mem(mmu : &mut MMU, machine : &mut Machine, virt_addr : u64, value : u64, size : i32) -> bool {
//Pour plus tard eventuellement considerer le boutisme de notre mémoire
//Peut etre pas si on fixe cela en BIG ENDIAN (octects poids fort au debut)
let mut phy_addr : u64 = 0;
let mut phy_addr_double_check : u64 = 0;
let exc = MMU::translate(mmu, virt_addr, &mut phy_addr, true);
MMU::translate(mmu, virt_addr, &mut phy_addr_double_check, true);
match exc {
ExceptionType::NO_EXCEPTION => {
if phy_addr != phy_addr_double_check {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_write_mem :: phy_addr != phy_addr_double_check");
return false;
}
else {
Machine::write_memory(machine, size, phy_addr as usize, value);
return true;
}
}
_ => {
//Besoin ici d'une impl pour gestion d'exeption
//dans nachos : g-machine->RaiseException(exc, virt_addr);
println!("Error from mmu_write_mem :: Exception different from NO_EXCEPTION");
return false;
}
}
true
}