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use super::WORD_SIZE;
pub const MEM_BITS: usize = 28;
pub const MEM_SIZE: usize = 1 << MEM_BITS;
pub struct Region {
start: usize,
len_bytes: usize,
}
const fn kb(kb: usize) -> usize {
kb * 1024
}
const fn mb(mb: usize) -> usize {
kb(mb * 1024)
}
impl Region {
pub const fn new(start: usize, len_bytes: usize) -> Self {
Self { start, len_bytes }
}
pub const fn start(&self) -> usize {
self.start
}
pub const fn len_bytes(&self) -> usize {
self.len_bytes
}
pub const fn len_words(&self) -> usize {
assert!((self.len_bytes % WORD_SIZE) == 0);
self.len_bytes / WORD_SIZE
}
pub const fn end(&self) -> usize {
self.start + self.len_bytes
}
}
pub const INPUT: Region = Region::new(0x0000_0400, mb(32) - kb(1));
pub const STACK: Region = Region::new(0x0200_0000, mb(16));
pub const DATA: Region = Region::new(0x0300_0000, mb(16));
pub const HEAP: Region = Region::new(0x0400_0000, mb(64));
pub const TEXT: Region = Region::new(0x0800_0000, mb(64));
pub const SYSTEM: Region = Region::new(0x0C00_0000, mb(16));
pub const PAGE_TABLE: Region = Region::new(0x0D00_0000, mb(16));
pub const PRE_LOAD: Region = Region::new(0x0D70_0000, mb(9));
pub const FFPU: Region = Region::new(0x0F00_0000, mb(16));