arm.zig

pub inline fn mrs(comptime reg: []const u8) u64 {
    var result: u64 = undefined;
    asm volatile ("mrs %[r], " ++ reg
        : [r] "=r" (result),
        :
        : "memory"
    );
    return result;
}

pub inline fn msr(comptime reg: []const u8, value: u64) void {
    asm volatile ("msr " ++ reg ++ ", %[r]"
        :
        : [r] "r" (value),
        : "memory"
    );
}

pub inline fn currentEL() u2 {
    return @truncate(u2, mrs("currentEL") >> 2);
}