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1 | /** @file\r | |
2 | Generic ARM implementation of DmaLib.h\r | |
3 | \r | |
4 | Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r | |
5 | \r | |
6 | This program and the accompanying materials\r | |
7 | are licensed and made available under the terms and conditions of the BSD License\r | |
8 | which accompanies this distribution. The full text of the license may be found at\r | |
9 | http://opensource.org/licenses/bsd-license.php\r | |
10 | \r | |
11 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
12 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
13 | \r | |
14 | **/\r | |
15 | \r | |
16 | #include <Uefi.h>\r | |
17 | #include <Library/DebugLib.h>\r | |
18 | #include <Library/DmaLib.h>\r | |
19 | #include <Library/MemoryAllocationLib.h>\r | |
20 | \r | |
21 | \r | |
22 | STATIC\r | |
23 | PHYSICAL_ADDRESS\r | |
24 | HostToDeviceAddress (\r | |
25 | IN VOID *Address\r | |
26 | )\r | |
27 | {\r | |
28 | return (PHYSICAL_ADDRESS)(UINTN)Address + PcdGet64 (PcdDmaDeviceOffset);\r | |
29 | }\r | |
30 | \r | |
31 | /**\r | |
32 | Provides the DMA controller-specific addresses needed to access system memory.\r | |
33 | \r | |
34 | Operation is relative to the DMA bus master.\r | |
35 | \r | |
36 | @param Operation Indicates if the bus master is going to read or write to system memory.\r | |
37 | @param HostAddress The system memory address to map to the DMA controller.\r | |
38 | @param NumberOfBytes On input the number of bytes to map. On output the number of bytes\r | |
39 | that were mapped.\r | |
40 | @param DeviceAddress The resulting map address for the bus master controller to use to\r | |
41 | access the hosts HostAddress.\r | |
42 | @param Mapping A resulting value to pass to Unmap().\r | |
43 | \r | |
44 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r | |
45 | @retval EFI_UNSUPPORTED The HostAddress cannot be mapped as a common buffer.\r | |
46 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
47 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r | |
48 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r | |
49 | \r | |
50 | **/\r | |
51 | EFI_STATUS\r | |
52 | EFIAPI\r | |
53 | DmaMap (\r | |
54 | IN DMA_MAP_OPERATION Operation,\r | |
55 | IN VOID *HostAddress,\r | |
56 | IN OUT UINTN *NumberOfBytes,\r | |
57 | OUT PHYSICAL_ADDRESS *DeviceAddress,\r | |
58 | OUT VOID **Mapping\r | |
59 | )\r | |
60 | {\r | |
61 | if (HostAddress == NULL ||\r | |
62 | NumberOfBytes == NULL ||\r | |
63 | DeviceAddress == NULL ||\r | |
64 | Mapping == NULL ) {\r | |
65 | return EFI_INVALID_PARAMETER;\r | |
66 | }\r | |
67 | *DeviceAddress = HostToDeviceAddress (HostAddress);\r | |
68 | *Mapping = NULL;\r | |
69 | return EFI_SUCCESS;\r | |
70 | }\r | |
71 | \r | |
72 | \r | |
73 | /**\r | |
74 | Completes the DmaMapBusMasterRead(), DmaMapBusMasterWrite(), or DmaMapBusMasterCommonBuffer()\r | |
75 | operation and releases any corresponding resources.\r | |
76 | \r | |
77 | @param Mapping The mapping value returned from DmaMap*().\r | |
78 | \r | |
79 | @retval EFI_SUCCESS The range was unmapped.\r | |
80 | @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r | |
81 | \r | |
82 | **/\r | |
83 | EFI_STATUS\r | |
84 | EFIAPI\r | |
85 | DmaUnmap (\r | |
86 | IN VOID *Mapping\r | |
87 | )\r | |
88 | {\r | |
89 | return EFI_SUCCESS;\r | |
90 | }\r | |
91 | \r | |
92 | /**\r | |
93 | Allocates pages that are suitable for an DmaMap() of type MapOperationBusMasterCommonBuffer.\r | |
94 | mapping.\r | |
95 | \r | |
96 | @param MemoryType The type of memory to allocate, EfiBootServicesData or\r | |
97 | EfiRuntimeServicesData.\r | |
98 | @param Pages The number of pages to allocate.\r | |
99 | @param HostAddress A pointer to store the base system memory address of the\r | |
100 | allocated range.\r | |
101 | \r | |
102 | @retval EFI_SUCCESS The requested memory pages were allocated.\r | |
103 | @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r | |
104 | MEMORY_WRITE_COMBINE and MEMORY_CACHED.\r | |
105 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
106 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r | |
107 | \r | |
108 | **/\r | |
109 | EFI_STATUS\r | |
110 | EFIAPI\r | |
111 | DmaAllocateBuffer (\r | |
112 | IN EFI_MEMORY_TYPE MemoryType,\r | |
113 | IN UINTN Pages,\r | |
114 | OUT VOID **HostAddress\r | |
115 | )\r | |
116 | {\r | |
117 | return DmaAllocateAlignedBuffer (MemoryType, Pages, 0, HostAddress);\r | |
118 | }\r | |
119 | \r | |
120 | \r | |
121 | /**\r | |
122 | Allocates pages that are suitable for an DmaMap() of type\r | |
123 | MapOperationBusMasterCommonBuffer mapping, at the requested alignment.\r | |
124 | \r | |
125 | @param MemoryType The type of memory to allocate, EfiBootServicesData or\r | |
126 | EfiRuntimeServicesData.\r | |
127 | @param Pages The number of pages to allocate.\r | |
128 | @param Alignment Alignment in bytes of the base of the returned\r | |
129 | buffer (must be a power of 2)\r | |
130 | @param HostAddress A pointer to store the base system memory address of the\r | |
131 | allocated range.\r | |
132 | \r | |
133 | @retval EFI_SUCCESS The requested memory pages were allocated.\r | |
134 | @retval EFI_UNSUPPORTED Attributes is unsupported. The only legal attribute bits are\r | |
135 | MEMORY_WRITE_COMBINE and MEMORY_CACHED.\r | |
136 | @retval EFI_INVALID_PARAMETER One or more parameters are invalid.\r | |
137 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r | |
138 | \r | |
139 | **/\r | |
140 | EFI_STATUS\r | |
141 | EFIAPI\r | |
142 | DmaAllocateAlignedBuffer (\r | |
143 | IN EFI_MEMORY_TYPE MemoryType,\r | |
144 | IN UINTN Pages,\r | |
145 | IN UINTN Alignment,\r | |
146 | OUT VOID **HostAddress\r | |
147 | )\r | |
148 | {\r | |
149 | if (Alignment == 0) {\r | |
150 | Alignment = EFI_PAGE_SIZE;\r | |
151 | }\r | |
152 | \r | |
153 | if (HostAddress == NULL ||\r | |
154 | (Alignment & (Alignment - 1)) != 0) {\r | |
155 | return EFI_INVALID_PARAMETER;\r | |
156 | }\r | |
157 | \r | |
158 | //\r | |
159 | // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r | |
160 | //\r | |
161 | if (MemoryType == EfiBootServicesData) {\r | |
162 | *HostAddress = AllocateAlignedPages (Pages, Alignment);\r | |
163 | } else if (MemoryType == EfiRuntimeServicesData) {\r | |
164 | *HostAddress = AllocateAlignedRuntimePages (Pages, Alignment);\r | |
165 | } else {\r | |
166 | return EFI_INVALID_PARAMETER;\r | |
167 | }\r | |
168 | \r | |
169 | if (*HostAddress == NULL) {\r | |
170 | return EFI_OUT_OF_RESOURCES;\r | |
171 | }\r | |
172 | return EFI_SUCCESS;\r | |
173 | }\r | |
174 | \r | |
175 | \r | |
176 | /**\r | |
177 | Frees memory that was allocated with DmaAllocateBuffer().\r | |
178 | \r | |
179 | @param Pages The number of pages to free.\r | |
180 | @param HostAddress The base system memory address of the allocated range.\r | |
181 | \r | |
182 | @retval EFI_SUCCESS The requested memory pages were freed.\r | |
183 | @retval EFI_INVALID_PARAMETER The memory range specified by HostAddress and Pages\r | |
184 | was not allocated with DmaAllocateBuffer().\r | |
185 | \r | |
186 | **/\r | |
187 | EFI_STATUS\r | |
188 | EFIAPI\r | |
189 | DmaFreeBuffer (\r | |
190 | IN UINTN Pages,\r | |
191 | IN VOID *HostAddress\r | |
192 | )\r | |
193 | {\r | |
194 | if (HostAddress == NULL) {\r | |
195 | return EFI_INVALID_PARAMETER;\r | |
196 | }\r | |
197 | \r | |
198 | FreePages (HostAddress, Pages);\r | |
199 | return EFI_SUCCESS;\r | |
200 | }\r | |
201 | \r |