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git.proxmox.com Git - mirror_edk2.git/blob - MdePkg/Library/SmmIoLibSmmCpuIo2/IoLibMmioBuffer.c
2 I/O Library MMIO Buffer Functions.
4 Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
5 SPDX-License-Identifier: BSD-2-Clause-Patent
9 #include "SmmCpuIoLibInternal.h"
12 Copy data from MMIO region to system memory by using 8-bit access.
14 Copy data from MMIO region specified by starting address StartAddress
15 to system memory specified by Buffer by using 8-bit access. The total
16 number of byte to be copied is specified by Length. Buffer is returned.
18 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
19 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
22 @param StartAddress The starting address for the MMIO region to be copied from.
23 @param Length The size in bytes of the copy.
24 @param Buffer The pointer to a system memory buffer receiving the data read.
32 IN UINTN StartAddress
,
39 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
40 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
42 ReturnBuffer
= Buffer
;
44 while (Length
-- > 0) {
45 *(Buffer
++) = MmioRead8 (StartAddress
++);
52 Copy data from MMIO region to system memory by using 16-bit access.
54 Copy data from MMIO region specified by starting address StartAddress
55 to system memory specified by Buffer by using 16-bit access. The total
56 number of byte to be copied is specified by Length. Buffer is returned.
58 If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
60 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
61 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
63 If Length is not aligned on a 16-bit boundary, then ASSERT().
65 If Buffer is not aligned on a 16-bit boundary, then ASSERT().
67 @param StartAddress The starting address for the MMIO region to be copied from.
68 @param Length The size in bytes of the copy.
69 @param Buffer The pointer to a system memory buffer receiving the data read.
77 IN UINTN StartAddress
,
84 ASSERT ((StartAddress
& (sizeof (UINT16
) - 1)) == 0);
86 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
87 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
89 ASSERT ((Length
& (sizeof (UINT16
) - 1)) == 0);
90 ASSERT (((UINTN
) Buffer
& (sizeof (UINT16
) - 1)) == 0);
92 ReturnBuffer
= Buffer
;
95 *(Buffer
++) = MmioRead16 (StartAddress
);
96 StartAddress
+= sizeof (UINT16
);
97 Length
-= sizeof (UINT16
);
104 Copy data from MMIO region to system memory by using 32-bit access.
106 Copy data from MMIO region specified by starting address StartAddress
107 to system memory specified by Buffer by using 32-bit access. The total
108 number of byte to be copied is specified by Length. Buffer is returned.
110 If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
112 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
113 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
115 If Length is not aligned on a 32-bit boundary, then ASSERT().
116 If Buffer is not aligned on a 32-bit boundary, then ASSERT().
118 @param StartAddress The starting address for the MMIO region to be copied from.
119 @param Length The size in bytes of the copy.
120 @param Buffer The pointer to a system memory buffer receiving the data read.
128 IN UINTN StartAddress
,
133 UINT32
*ReturnBuffer
;
135 ASSERT ((StartAddress
& (sizeof (UINT32
) - 1)) == 0);
137 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
138 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
140 ASSERT ((Length
& (sizeof (UINT32
) - 1)) == 0);
141 ASSERT (((UINTN
) Buffer
& (sizeof (UINT32
) - 1)) == 0);
143 ReturnBuffer
= Buffer
;
146 *(Buffer
++) = MmioRead32 (StartAddress
);
147 StartAddress
+= sizeof (UINT32
);
148 Length
-= sizeof (UINT32
);
155 Copy data from MMIO region to system memory by using 64-bit access.
157 Copy data from MMIO region specified by starting address StartAddress
158 to system memory specified by Buffer by using 64-bit access. The total
159 number of byte to be copied is specified by Length. Buffer is returned.
161 If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
163 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
164 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
166 If Length is not aligned on a 64-bit boundary, then ASSERT().
168 If Buffer is not aligned on a 64-bit boundary, then ASSERT().
170 @param StartAddress The starting address for the MMIO region to be copied from.
171 @param Length The size in bytes of the copy.
172 @param Buffer The pointer to a system memory buffer receiving the data read.
180 IN UINTN StartAddress
,
185 UINT64
*ReturnBuffer
;
187 ASSERT ((StartAddress
& (sizeof (UINT64
) - 1)) == 0);
189 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
190 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
192 ASSERT ((Length
& (sizeof (UINT64
) - 1)) == 0);
193 ASSERT (((UINTN
) Buffer
& (sizeof (UINT64
) - 1)) == 0);
195 ReturnBuffer
= Buffer
;
198 *(Buffer
++) = MmioRead64 (StartAddress
);
199 StartAddress
+= sizeof (UINT64
);
200 Length
-= sizeof (UINT64
);
208 Copy data from system memory to MMIO region by using 8-bit access.
210 Copy data from system memory specified by Buffer to MMIO region specified
211 by starting address StartAddress by using 8-bit access. The total number
212 of byte to be copied is specified by Length. Buffer is returned.
214 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
215 If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
218 @param StartAddress The starting address for the MMIO region to be copied to.
219 @param Length The size in bytes of the copy.
220 @param Buffer The pointer to a system memory buffer containing the
229 IN UINTN StartAddress
,
231 IN CONST UINT8
*Buffer
236 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
237 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
239 ReturnBuffer
= (UINT8
*) Buffer
;
241 while (Length
-- > 0) {
242 MmioWrite8 (StartAddress
++, *(Buffer
++));
250 Copy data from system memory to MMIO region by using 16-bit access.
252 Copy data from system memory specified by Buffer to MMIO region specified
253 by starting address StartAddress by using 16-bit access. The total number
254 of byte to be copied is specified by Length. Buffer is returned.
256 If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
258 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
259 If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
261 If Length is not aligned on a 16-bit boundary, then ASSERT().
263 If Buffer is not aligned on a 16-bit boundary, then ASSERT().
265 @param StartAddress The starting address for the MMIO region to be copied to.
266 @param Length The size in bytes of the copy.
267 @param Buffer The pointer to a system memory buffer containing the
276 IN UINTN StartAddress
,
278 IN CONST UINT16
*Buffer
281 UINT16
*ReturnBuffer
;
283 ASSERT ((StartAddress
& (sizeof (UINT16
) - 1)) == 0);
285 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
286 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
288 ASSERT ((Length
& (sizeof (UINT16
) - 1)) == 0);
289 ASSERT (((UINTN
) Buffer
& (sizeof (UINT16
) - 1)) == 0);
291 ReturnBuffer
= (UINT16
*) Buffer
;
294 MmioWrite16 (StartAddress
, *(Buffer
++));
296 StartAddress
+= sizeof (UINT16
);
297 Length
-= sizeof (UINT16
);
305 Copy data from system memory to MMIO region by using 32-bit access.
307 Copy data from system memory specified by Buffer to MMIO region specified
308 by starting address StartAddress by using 32-bit access. The total number
309 of byte to be copied is specified by Length. Buffer is returned.
311 If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
313 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
314 If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
316 If Length is not aligned on a 32-bit boundary, then ASSERT().
318 If Buffer is not aligned on a 32-bit boundary, then ASSERT().
320 @param StartAddress The starting address for the MMIO region to be copied to.
321 @param Length The size in bytes of the copy.
322 @param Buffer The pointer to a system memory buffer containing the
331 IN UINTN StartAddress
,
333 IN CONST UINT32
*Buffer
336 UINT32
*ReturnBuffer
;
338 ASSERT ((StartAddress
& (sizeof (UINT32
) - 1)) == 0);
340 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
341 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
343 ASSERT ((Length
& (sizeof (UINT32
) - 1)) == 0);
344 ASSERT (((UINTN
) Buffer
& (sizeof (UINT32
) - 1)) == 0);
346 ReturnBuffer
= (UINT32
*) Buffer
;
349 MmioWrite32 (StartAddress
, *(Buffer
++));
351 StartAddress
+= sizeof (UINT32
);
352 Length
-= sizeof (UINT32
);
359 Copy data from system memory to MMIO region by using 64-bit access.
361 Copy data from system memory specified by Buffer to MMIO region specified
362 by starting address StartAddress by using 64-bit access. The total number
363 of byte to be copied is specified by Length. Buffer is returned.
365 If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
367 If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
368 If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
370 If Length is not aligned on a 64-bit boundary, then ASSERT().
372 If Buffer is not aligned on a 64-bit boundary, then ASSERT().
374 @param StartAddress The starting address for the MMIO region to be copied to.
375 @param Length The size in bytes of the copy.
376 @param Buffer The pointer to a system memory buffer containing the
385 IN UINTN StartAddress
,
387 IN CONST UINT64
*Buffer
390 UINT64
*ReturnBuffer
;
392 ASSERT ((StartAddress
& (sizeof (UINT64
) - 1)) == 0);
394 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- StartAddress
));
395 ASSERT ((Length
- 1) <= (MAX_ADDRESS
- (UINTN
) Buffer
));
397 ASSERT ((Length
& (sizeof (UINT64
) - 1)) == 0);
398 ASSERT (((UINTN
) Buffer
& (sizeof (UINT64
) - 1)) == 0);
400 ReturnBuffer
= (UINT64
*) Buffer
;
403 MmioWrite64 (StartAddress
, *(Buffer
++));
405 StartAddress
+= sizeof (UINT64
);
406 Length
-= sizeof (UINT64
);