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pub const CLOCK_FREQ: usize = 12500000;
pub const MEMORY_END: usize = 0x88000000;
pub const MMIO: &[(usize, usize)] = &[
(0x0010_0000, 0x00_2000), // VIRT_TEST/RTC in virt machine
(0x1000_1000, 0x00_1000), // Virtio Block in virt machine
];
pub type BlockDeviceImpl = crate::drivers::block::VirtIOBlock;