mips 0.2.1

Low-level abstraction of MIPS processors
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152

//! Traits for MIPS CP0 registers

macro_rules! register_r {
    ($reg_id: expr, $reg_sel: expr) => {
        #[inline]
        unsafe fn __read() -> u32 {
            let reg: u32;
            asm!("mfc0 $0, $$$1, $2"
                 : "=r"(reg)
                 : "i"($reg_id), "i"($reg_sel)
            );
            reg
        }

        #[inline]
        pub fn read_u32() -> u32 {
            unsafe { __read() }
        }
    };
}

macro_rules! register_w {
    ($reg_id: expr, $reg_sel: expr) => {
        #[inline]
        unsafe fn __write(reg: u32) {
            asm!("mtc0 $0, $$$1, $2"
                 :
                 : "r"(reg), "i"($reg_id), "i"($reg_sel)
                 :
                 : "volatile"
            );
        }

        #[inline]
        pub fn write_u32(reg: u32) {
            unsafe { __write(reg); }
        }
    };
}

macro_rules! register_rw {
    ($reg_id: expr, $reg_sel: expr) => {
        register_r!($reg_id, $reg_sel);
        register_w!($reg_id, $reg_sel);
    };
}

macro_rules! register_struct_rw {
    ($ident: ident) => {
        #[inline]
        pub fn read() -> $ident {
            $ident { bits: read_u32() }
        }

        #[inline]
        pub fn write(reg: $ident) {
            write_u32(reg.bits);
        }
    };
}

macro_rules! register_set_bit {
    ($setter: ident, $bit: expr) => {
        #[inline]
        pub fn $setter() {
            write_u32(read_u32() | (1u32 << $bit));
        }
    };
}

macro_rules! register_reset_bit {
    ($resetter: ident, $bit: expr) => {
        #[inline]
        pub fn $resetter() {
            write_u32(read_u32() & !(1u32 << $bit));
        }
    };
}

macro_rules! register_set_reset_bit {
    ($setter: ident, $resetter: ident, $bit: expr) => {
        register_set_bit!($setter, $bit);
        register_reset_bit!($resetter, $bit);
    };
}

macro_rules! register_field {
    ($getter: ident, $setter: ident, $offset: expr, $size: expr) => {
        pub fn $getter(&self) -> u32 {
            (self.bits >> $offset) & ((1 << $size) - 1)
        }

        pub fn $setter(&mut self, val: u32) {
            let mask: u32 = ((1 << $size) - 1) << $offset;
            self.bits = (self.bits & !mask) | ((val << $offset) & mask);
        }
    };
}


macro_rules! register_flags {
    () => {
        #[inline]
        pub fn set_flags(&mut self, flags: Flags) {
            self.bits = (self.bits & !Flags::FLAG_MASK.bits()) | (flags & Flags::FLAG_MASK).bits();
        }

        #[inline]
        pub fn get_flags(&self) -> Flags {
            Flags { bits: self.bits & Flags::FLAG_MASK.bits() }
        }
    };
}

macro_rules! register_struct_block_setter {
    ($setter: ident, $val: expr, $mask: expr) => {
        #[inline]
        pub fn $setter(&mut self) {
            self.bits = (self.bits & !$mask) | $val;
        }
    };
}

macro_rules! register_struct_bit_getter {
    ($getter: ident, $bit: expr) => {
        #[inline]
        pub fn $getter(&self) -> bool {
            ((self.bits >> $bit) & 1) != 0
        }
    };
}

macro_rules! register_struct_bit_setter {
    ($setter: ident, $resetter: ident, $bit: expr) => {
        #[inline]
        pub fn $setter(&mut self) {
            self.bits = self.bits | (1 << $bit);
        }
        
        #[inline]
        pub fn $resetter(&mut self) {
            self.bits = self.bits & !(1 << $bit);
        }
    };
}

macro_rules! register_struct_bit_accessor {
    ($getter: ident, $setter: ident, $resetter: ident, $bit: expr) => {
        register_struct_bit_getter!($getter, $bit);
        register_struct_bit_setter!($setter, $resetter, $bit);
    };
}