# gpax4.rs - source
Source of the Rust file `/home/runner/.cargo/git/checkouts/riscv-ab2abd16c438337b/11d43cf/src/addr/gpax4.rs`.
Keywords: rust, rustlang, rust-lang

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    use super::*;
    use bit_field::BitField;
    use core::convert::TryInto;

    #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
    pub struct GPAddrSv32X4(u64);

    impl Address for GPAddrSv32X4 {
        fn new(addr: usize) -> Self {
            Self::new_u64(addr as u64)
        }
        fn as_usize(&self) -> usize {
            self.0 as usize
        }
        fn page_number(&self) -> usize {
            self.0.get_bits(12..34) as usize
        }
        fn page_offset(&self) -> usize {
            self.0.get_bits(0..12) as usize
        }
        fn to_4k_aligned(&self) -> Self {
            GPAddrSv32X4((self.0 >> 12) << 12)
        }
    }

    impl VirtualAddress for GPAddrSv32X4 {
        unsafe fn as_mut<'a, 'b, T>(&'a self) -> &'b mut T {
            &mut *(self.0 as *mut T)
        }
    }

    impl AddressL2 for GPAddrSv32X4 {
        fn p2_index(&self) -> usize {
            self.0.get_bits(22..34) as usize
        }
        fn p1_index(&self) -> usize {
            self.0.get_bits(12..22) as usize
        }
        fn from_page_table_indices(p2_index: usize, p1_index: usize, offset: usize) -> Self {
            let p2_index = p2_index as u64;
            let p1_index = p1_index as u64;
            let offset = offset as u64;
            assert!(p2_index.get_bits(12..) == 0, "p2_index exceeding 12 bits");
            assert!(p1_index.get_bits(10..) == 0, "p1_index exceeding 10 bits");
            assert!(offset.get_bits(12..) == 0, "offset exceeding 12 bits");
            GPAddrSv32X4::new_u64((p2_index << 22) | (p1_index << 12) | offset)
        }
    }

    impl AddressX64 for GPAddrSv32X4 {
        fn new_u64(addr: u64) -> Self {
            assert!(
                addr.get_bits(34..64) == 0,
                "Sv32x4 does not allow pa 34..64!=0"
            );
            GPAddrSv32X4(addr)
        }
        fn as_u64(&self) -> u64 {
            self.0
        }
    }

    #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
    pub struct GPAddrSv39X4(u64);

    impl Address for GPAddrSv39X4 {
        fn new(addr: usize) -> Self {
            GPAddrSv39X4(addr.try_into().unwrap())
        }
        fn as_usize(&self) -> usize {
            self.0 as usize
        }
        fn page_number(&self) -> usize {
            self.0.get_bits(12..41) as usize
        }
        fn page_offset(&self) -> usize {
            self.0.get_bits(0..12) as usize
        }
        fn to_4k_aligned(&self) -> Self {
            GPAddrSv39X4((self.0 >> 12) << 12)
        }
    }

    impl VirtualAddress for GPAddrSv39X4 {
        unsafe fn as_mut<'a, 'b, T>(&'a self) -> &'b mut T {
            &mut *(self.0 as *mut T)
        }
    }

    impl AddressL3 for GPAddrSv39X4 {
        fn p3_index(&self) -> usize {
            self.0.get_bits(30..41) as usize
        }
        fn p2_index(&self) -> usize {
            self.0.get_bits(21..30) as usize
        }
        fn p1_index(&self) -> usize {
            self.0.get_bits(12..21) as usize
        }
        fn from_page_table_indices(
            p3_index: usize,
            p2_index: usize,
            p1_index: usize,
            offset: usize,
        ) -> Self {
            let p3_index = p3_index as u64;
            let p2_index = p2_index as u64;
            let p1_index = p1_index as u64;
            let offset = offset as u64;
            assert!(p3_index.get_bits(11..) == 0, "p3_index exceeding 11 bits");
            assert!(p2_index.get_bits(9..) == 0, "p2_index exceeding 9 bits");
            assert!(p1_index.get_bits(9..) == 0, "p1_index exceeding 9 bits");
            assert!(offset.get_bits(12..) == 0, "offset exceeding 12 bits");
            GPAddrSv39X4::new_u64(
                (p3_index << 12 << 9 << 9) | (p2_index << 12 << 9) | (p1_index << 12) | offset,
            )
        }
    }

    impl AddressX64 for GPAddrSv39X4 {
        fn new_u64(addr: u64) -> Self {
            assert!(
                addr.get_bits(41..64) == 0,
                "Sv39x4 does not allow pa 41..64!=0"
            );
            GPAddrSv39X4(addr)
        }
        fn as_u64(&self) -> u64 {
            self.0
        }
    }

    #[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)]
    pub struct GPAddrSv48X4(u64);

    impl Address for GPAddrSv48X4 {
        fn new(addr: usize) -> Self {
            GPAddrSv48X4(addr.try_into().unwrap())
        }
        fn as_usize(&self) -> usize {
            self.0 as usize
        }
        fn page_number(&self) -> usize {
            self.0.get_bits(12..50) as usize
        }
        fn page_offset(&self) -> usize {
            self.0.get_bits(0..12) as usize
        }
        fn to_4k_aligned(&self) -> Self {
            GPAddrSv48X4((self.0 >> 12) << 12)
        }
    }

    impl VirtualAddress for GPAddrSv48X4 {
        unsafe fn as_mut<'a, 'b, T>(&'a self) -> &'b mut T {
            &mut *(self.0 as *mut T)
        }
    }

    impl AddressL4 for GPAddrSv48X4 {
        fn p4_index(&self) -> usize {
            self.0.get_bits(39..50) as usize
        }
        fn p3_index(&self) -> usize {
            self.0.get_bits(30..39) as usize
        }
        fn p2_index(&self) -> usize {
            self.0.get_bits(21..30) as usize
        }
        fn p1_index(&self) -> usize {
            self.0.get_bits(12..21) as usize
        }
        fn from_page_table_indices(
            p4_index: usize,
            p3_index: usize,
            p2_index: usize,
            p1_index: usize,
            offset: usize,
        ) -> Self {
            let p4_index = p4_index as u64;
            let p3_index = p3_index as u64;
            let p2_index = p2_index as u64;
            let p1_index = p1_index as u64;
            let offset = offset as u64;
            assert!(p4_index.get_bits(11..) == 0, "p4_index exceeding 11 bits");
            assert!(p3_index.get_bits(9..) == 0, "p3_index exceeding 9 bits");
            assert!(p2_index.get_bits(9..) == 0, "p2_index exceeding 9 bits");
            assert!(p1_index.get_bits(9..) == 0, "p1_index exceeding 9 bits");
            assert!(offset.get_bits(12..) == 0, "offset exceeding 12 bits");
            GPAddrSv48X4::new_u64(
                (p4_index << 12 << 9 << 9 << 9)
                    | (p3_index << 12 << 9 << 9)
                    | (p2_index << 12 << 9)
                    | (p1_index << 12)
                    | offset,
            )
        }
    }

    impl AddressX64 for GPAddrSv48X4 {
        fn new_u64(addr: u64) -> Self {
            assert!(
                addr.get_bits(50..64) == 0,
                "Sv48x4 does not allow pa 50..64!=0"
            );
            GPAddrSv48X4(addr)
        }
        fn as_u64(&self) -> u64 {
            self.0
        }
    }