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devices: legacy: Implement Arm PL011 UART

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This commit implements the Arm PrimeCell UART(PL011) device.

Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit is contained in:
Henry Wang
2021-03-07 19:31:07 +08:00
committed by Michael
parent c85fba0c43
commit fd95acc60f
4 changed files with 575 additions and 46 deletions
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devices/src/lib.rs
+60
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@@ -46,3 +46,63 @@ bitflags! {
const POWER_BUTTON_CHANGED = 0b1000;
}
}
#[allow(unused_macros)]
#[cfg(target_arch = "aarch64")]
macro_rules! generate_read_fn {
($fn_name: ident, $data_type: ty, $byte_type: ty, $type_size: expr, $endian_type: ident) => {
#[allow(dead_code)]
pub fn $fn_name(input: &[$byte_type]) -> $data_type {
assert!($type_size == std::mem::size_of::<$data_type>());
let mut array = [0u8; $type_size];
for (byte, read) in array.iter_mut().zip(input.iter().cloned()) {
*byte = read as u8;
}
<$data_type>::$endian_type(array)
}
};
}
#[allow(unused_macros)]
#[cfg(target_arch = "aarch64")]
macro_rules! generate_write_fn {
($fn_name: ident, $data_type: ty, $byte_type: ty, $endian_type: ident) => {
#[allow(dead_code)]
pub fn $fn_name(buf: &mut [$byte_type], n: $data_type) {
for (byte, read) in buf
.iter_mut()
.zip(<$data_type>::$endian_type(n).iter().cloned())
{
*byte = read as $byte_type;
}
}
};
}
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_le_u16, u16, u8, 2, from_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_le_u32, u32, u8, 4, from_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_le_u64, u64, u8, 8, from_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_le_i32, i32, i8, 4, from_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_be_u16, u16, u8, 2, from_be_bytes);
#[cfg(target_arch = "aarch64")]
generate_read_fn!(read_be_u32, u32, u8, 4, from_be_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_le_u16, u16, u8, to_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_le_u32, u32, u8, to_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_le_u64, u64, u8, to_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_le_i32, i32, i8, to_le_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_be_u16, u16, u8, to_be_bytes);
#[cfg(target_arch = "aarch64")]
generate_write_fn!(write_be_u32, u32, u8, to_be_bytes);