]>
Commit | Line | Data |
---|---|---|
9095d37b LG |
1 | ;\r |
2 | ; Copyright (c) 2014-2018, Linaro Limited. All rights reserved.\r | |
3 | ;\r | |
9344f092 | 4 | ; SPDX-License-Identifier: BSD-2-Clause-Patent\r |
9095d37b LG |
5 | ;\r |
6 | \r | |
7 | \r | |
8 | AREA IoLibMmio, CODE, READONLY\r | |
9 | \r | |
10 | EXPORT MmioRead8Internal\r | |
11 | EXPORT MmioWrite8Internal\r | |
12 | EXPORT MmioRead16Internal\r | |
13 | EXPORT MmioWrite16Internal\r | |
14 | EXPORT MmioRead32Internal\r | |
15 | EXPORT MmioWrite32Internal\r | |
16 | EXPORT MmioRead64Internal\r | |
17 | EXPORT MmioWrite64Internal\r | |
18 | \r | |
19 | ;\r | |
20 | ; Reads an 8-bit MMIO register.\r | |
21 | ;\r | |
22 | ; Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
23 | ; returned. This function must guarantee that all MMIO read and write\r | |
24 | ; operations are serialized.\r | |
25 | ;\r | |
26 | ; @param Address The MMIO register to read.\r | |
27 | ;\r | |
28 | ; @return The value read.\r | |
29 | ;\r | |
30 | MmioRead8Internal\r | |
31 | ldrb w0, [x0]\r | |
32 | dmb ld\r | |
33 | ret\r | |
34 | \r | |
35 | ;\r | |
36 | ; Writes an 8-bit MMIO register.\r | |
37 | ;\r | |
38 | ; Writes the 8-bit MMIO register specified by Address with the value specified\r | |
39 | ; by Value and returns Value. This function must guarantee that all MMIO read\r | |
40 | ; and write operations are serialized.\r | |
41 | ;\r | |
42 | ; @param Address The MMIO register to write.\r | |
43 | ; @param Value The value to write to the MMIO register.\r | |
44 | ;\r | |
45 | MmioWrite8Internal\r | |
46 | dmb st\r | |
47 | strb w1, [x0]\r | |
48 | ret\r | |
49 | \r | |
50 | ;\r | |
51 | ; Reads a 16-bit MMIO register.\r | |
52 | ;\r | |
53 | ; Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
54 | ; returned. This function must guarantee that all MMIO read and write\r | |
55 | ; operations are serialized.\r | |
56 | ;\r | |
57 | ; @param Address The MMIO register to read.\r | |
58 | ;\r | |
59 | ; @return The value read.\r | |
60 | ;\r | |
61 | MmioRead16Internal\r | |
62 | ldrh w0, [x0]\r | |
63 | dmb ld\r | |
64 | ret\r | |
65 | \r | |
66 | ;\r | |
67 | ; Writes a 16-bit MMIO register.\r | |
68 | ;\r | |
69 | ; Writes the 16-bit MMIO register specified by Address with the value specified\r | |
70 | ; by Value and returns Value. This function must guarantee that all MMIO read\r | |
71 | ; and write operations are serialized.\r | |
72 | ;\r | |
73 | ; @param Address The MMIO register to write.\r | |
74 | ; @param Value The value to write to the MMIO register.\r | |
75 | ;\r | |
76 | MmioWrite16Internal\r | |
77 | dmb st\r | |
78 | strh w1, [x0]\r | |
79 | ret\r | |
80 | \r | |
81 | ;\r | |
82 | ; Reads a 32-bit MMIO register.\r | |
83 | ;\r | |
84 | ; Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
85 | ; returned. This function must guarantee that all MMIO read and write\r | |
86 | ; operations are serialized.\r | |
87 | ;\r | |
88 | ; @param Address The MMIO register to read.\r | |
89 | ;\r | |
90 | ; @return The value read.\r | |
91 | ;\r | |
92 | MmioRead32Internal\r | |
93 | ldr w0, [x0]\r | |
94 | dmb ld\r | |
95 | ret\r | |
96 | \r | |
97 | ;\r | |
98 | ; Writes a 32-bit MMIO register.\r | |
99 | ;\r | |
100 | ; Writes the 32-bit MMIO register specified by Address with the value specified\r | |
101 | ; by Value and returns Value. This function must guarantee that all MMIO read\r | |
102 | ; and write operations are serialized.\r | |
103 | ;\r | |
104 | ; @param Address The MMIO register to write.\r | |
105 | ; @param Value The value to write to the MMIO register.\r | |
106 | ;\r | |
107 | MmioWrite32Internal\r | |
108 | dmb st\r | |
109 | str w1, [x0]\r | |
110 | ret\r | |
111 | \r | |
112 | ;\r | |
113 | ; Reads a 64-bit MMIO register.\r | |
114 | ;\r | |
115 | ; Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
116 | ; returned. This function must guarantee that all MMIO read and write\r | |
117 | ; operations are serialized.\r | |
118 | ;\r | |
119 | ; @param Address The MMIO register to read.\r | |
120 | ;\r | |
121 | ; @return The value read.\r | |
122 | ;\r | |
123 | MmioRead64Internal\r | |
124 | ldr x0, [x0]\r | |
125 | dmb ld\r | |
126 | ret\r | |
127 | \r | |
128 | ;\r | |
129 | ; Writes a 64-bit MMIO register.\r | |
130 | ;\r | |
131 | ; Writes the 64-bit MMIO register specified by Address with the value specified\r | |
132 | ; by Value and returns Value. This function must guarantee that all MMIO read\r | |
133 | ; and write operations are serialized.\r | |
134 | ;\r | |
135 | ; @param Address The MMIO register to write.\r | |
136 | ; @param Value The value to write to the MMIO register.\r | |
137 | ;\r | |
138 | MmioWrite64Internal\r | |
139 | dmb st\r | |
140 | str x1, [x0]\r | |
141 | ret\r | |
142 | \r | |
143 | END\r |