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// SPDX-License-Identifier: Apache-2.0 OR MIT
//
// Copyright (c) 2018-2022 by the author(s)
//
// Author(s):
// - Andre Richter <andre.o.richter@gmail.com>
macro_rules! __read_raw {
($width:ty, $asm_instr:tt, $asm_reg_name:tt, $asm_width:tt) => {
/// Reads the raw bits of the CPU register.
#[inline]
fn get(&self) -> $width {
match () {
#[cfg(target_arch = "aarch64")]
() => {
let reg;
unsafe {
core::arch::asm!(concat!($asm_instr, " {reg:", $asm_width, "}, ", $asm_reg_name), reg = out(reg) reg, options(nomem, nostack));
}
reg
}
#[cfg(not(target_arch = "aarch64"))]
() => unimplemented!(),
}
}
};
}
macro_rules! __write_raw {
($width:ty, $asm_instr:tt, $asm_reg_name:tt, $asm_width:tt) => {
/// Writes raw bits to the CPU register.
#[cfg_attr(not(target_arch = "aarch64"), allow(unused_variables))]
#[inline]
fn set(&self, value: $width) {
match () {
#[cfg(target_arch = "aarch64")]
() => {
unsafe {
core::arch::asm!(concat!($asm_instr, " ", $asm_reg_name, ", {reg:", $asm_width, "}"), reg = in(reg) value, options(nomem, nostack))
}
}
#[cfg(not(target_arch = "aarch64"))]
() => unimplemented!(),
}
}
};
}
/// Raw read from system coprocessor registers.
macro_rules! sys_coproc_read_raw {
($width:ty, $asm_reg_name:tt, $asm_width:tt) => {
__read_raw!($width, "mrs", $asm_reg_name, $asm_width);
};
}
/// Raw write to system coprocessor registers.
macro_rules! sys_coproc_write_raw {
($width:ty, $asm_reg_name:tt, $asm_width:tt) => {
__write_raw!($width, "msr", $asm_reg_name, $asm_width);
};
}
/// Raw read from (ordinary) registers.
macro_rules! read_raw {
($width:ty, $asm_reg_name:tt, $asm_width:tt) => {
__read_raw!($width, "mov", $asm_reg_name, $asm_width);
};
}
/// Raw write to (ordinary) registers.
macro_rules! write_raw {
($width:ty, $asm_reg_name:tt, $asm_width:tt) => {
__write_raw!($width, "mov", $asm_reg_name, $asm_width);
};
}
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