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redone page size thing

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Erin 2023-06-22 11:55:33 +02:00 committed by ondra05
parent a08e0172c9
commit 965a6a2c19
1 changed files with 12 additions and 5 deletions
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17
hbvm/src/vm/mem/mod.rs
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@ -206,9 +206,9 @@ impl Iterator for PageSplitter {
ptr as *mut u8, ptr as *mut u8,
perm, perm,
match lvl { match lvl {
0 => 4096, 0 => PageSize::Size4K,
1 => 1024_usize.pow(2) * 2, 1 => PageSize::Size2M,
2 => 1024_usize.pow(3), 2 => PageSize::Size1G,
_ => return None, _ => return None,
}, },
self.addr as usize & ((1 << (lvl * 9 + 12)) - 1), self.addr as usize & ((1 << (lvl * 9 + 12)) - 1),
@ -220,9 +220,9 @@ impl Iterator for PageSplitter {
return None; return None;
}; };
let avail = (size - offset).clamp(0, self.size); let avail = (size as usize - offset).clamp(0, self.size);
self.addr += size as u64; self.addr += size as u64;
self.size = self.size.saturating_sub(size); self.size = self.size.saturating_sub(size as _);
Some(PageSplitResult { Some(PageSplitResult {
ptr: unsafe { base.add(offset) }, ptr: unsafe { base.add(offset) },
size: avail, size: avail,
@ -230,3 +230,10 @@ impl Iterator for PageSplitter {
}) })
} }
} }
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum PageSize {
Size4K = 4096,
Size2M = 1024 * 1024 * 2,
Size1G = 1024 * 1024 * 1024,
}