| 1 | /** @file
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| 2 | I/O Library MMIO Buffer Functions.
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| 3 |
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| 4 | Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
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| 5 | SPDX-License-Identifier: BSD-2-Clause-Patent
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| 6 |
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| 7 | **/
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| 8 |
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| 9 | #include "DxeCpuIo2LibInternal.h"
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| 10 |
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| 11 | /**
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| 12 | Copy data from MMIO region to system memory by using 8-bit access.
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| 13 |
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| 14 | Copy data from MMIO region specified by starting address StartAddress
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| 15 | to system memory specified by Buffer by using 8-bit access. The total
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| 16 | number of byte to be copied is specified by Length. Buffer is returned.
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| 17 |
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| 18 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 19 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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| 20 |
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| 21 |
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| 22 | @param StartAddress The starting address for the MMIO region to be copied from.
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| 23 | @param Length The size in bytes of the copy.
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| 24 | @param Buffer The pointer to a system memory buffer receiving the data read.
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| 25 |
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| 26 | @return Buffer
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| 27 |
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| 28 | **/
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| 29 | UINT8 *
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| 30 | EFIAPI
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| 31 | MmioReadBuffer8 (
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| 32 | IN UINTN StartAddress,
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| 33 | IN UINTN Length,
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| 34 | OUT UINT8 *Buffer
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| 35 | )
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| 36 | {
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| 37 | UINT8 *ReturnBuffer;
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| 38 |
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| 39 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 40 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 41 |
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| 42 | ReturnBuffer = Buffer;
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| 43 |
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| 44 | while (Length-- > 0) {
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| 45 | *(Buffer++) = MmioRead8 (StartAddress++);
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| 46 | }
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| 47 |
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| 48 | return ReturnBuffer;
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| 49 | }
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| 50 |
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| 51 | /**
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| 52 | Copy data from MMIO region to system memory by using 16-bit access.
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| 53 |
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| 54 | Copy data from MMIO region specified by starting address StartAddress
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| 55 | to system memory specified by Buffer by using 16-bit access. The total
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| 56 | number of byte to be copied is specified by Length. Buffer is returned.
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| 57 |
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| 58 | If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
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| 59 |
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| 60 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 61 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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| 62 |
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| 63 | If Length is not aligned on a 16-bit boundary, then ASSERT().
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| 64 |
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| 65 | If Buffer is not aligned on a 16-bit boundary, then ASSERT().
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| 66 |
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| 67 | @param StartAddress The starting address for the MMIO region to be copied from.
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| 68 | @param Length The size in bytes of the copy.
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| 69 | @param Buffer The pointer to a system memory buffer receiving the data read.
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| 70 |
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| 71 | @return Buffer.
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| 72 |
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| 73 | **/
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| 74 | UINT16 *
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| 75 | EFIAPI
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| 76 | MmioReadBuffer16 (
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| 77 | IN UINTN StartAddress,
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| 78 | IN UINTN Length,
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| 79 | OUT UINT16 *Buffer
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| 80 | )
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| 81 | {
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| 82 | UINT16 *ReturnBuffer;
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| 83 |
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| 84 | ASSERT ((StartAddress & (sizeof (UINT16) - 1)) == 0);
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| 85 |
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| 86 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 87 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 88 |
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| 89 | ASSERT ((Length & (sizeof (UINT16) - 1)) == 0);
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| 90 | ASSERT (((UINTN)Buffer & (sizeof (UINT16) - 1)) == 0);
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| 91 |
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| 92 | ReturnBuffer = Buffer;
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| 93 |
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| 94 | while (Length > 0) {
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| 95 | *(Buffer++) = MmioRead16 (StartAddress);
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| 96 | StartAddress += sizeof (UINT16);
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| 97 | Length -= sizeof (UINT16);
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| 98 | }
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| 99 |
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| 100 | return ReturnBuffer;
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| 101 | }
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| 102 |
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| 103 | /**
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| 104 | Copy data from MMIO region to system memory by using 32-bit access.
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| 105 |
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| 106 | Copy data from MMIO region specified by starting address StartAddress
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| 107 | to system memory specified by Buffer by using 32-bit access. The total
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| 108 | number of byte to be copied is specified by Length. Buffer is returned.
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| 109 |
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| 110 | If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
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| 111 |
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| 112 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 113 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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| 114 |
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| 115 | If Length is not aligned on a 32-bit boundary, then ASSERT().
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| 116 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().
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| 117 |
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| 118 | @param StartAddress The starting address for the MMIO region to be copied from.
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| 119 | @param Length The size in bytes of the copy.
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| 120 | @param Buffer The pointer to a system memory buffer receiving the data read.
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| 121 |
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| 122 | @return Buffer.
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| 123 |
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| 124 | **/
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| 125 | UINT32 *
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| 126 | EFIAPI
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| 127 | MmioReadBuffer32 (
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| 128 | IN UINTN StartAddress,
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| 129 | IN UINTN Length,
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| 130 | OUT UINT32 *Buffer
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| 131 | )
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| 132 | {
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| 133 | UINT32 *ReturnBuffer;
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| 134 |
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| 135 | ASSERT ((StartAddress & (sizeof (UINT32) - 1)) == 0);
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| 136 |
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| 137 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 138 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 139 |
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| 140 | ASSERT ((Length & (sizeof (UINT32) - 1)) == 0);
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| 141 | ASSERT (((UINTN)Buffer & (sizeof (UINT32) - 1)) == 0);
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| 142 |
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| 143 | ReturnBuffer = Buffer;
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| 144 |
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| 145 | while (Length > 0) {
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| 146 | *(Buffer++) = MmioRead32 (StartAddress);
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| 147 | StartAddress += sizeof (UINT32);
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| 148 | Length -= sizeof (UINT32);
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| 149 | }
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| 150 |
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| 151 | return ReturnBuffer;
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| 152 | }
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| 153 |
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| 154 | /**
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| 155 | Copy data from MMIO region to system memory by using 64-bit access.
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| 156 |
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| 157 | Copy data from MMIO region specified by starting address StartAddress
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| 158 | to system memory specified by Buffer by using 64-bit access. The total
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| 159 | number of byte to be copied is specified by Length. Buffer is returned.
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| 160 |
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| 161 | If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
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| 162 |
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| 163 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 164 | If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
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| 165 |
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| 166 | If Length is not aligned on a 64-bit boundary, then ASSERT().
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| 167 |
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| 168 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().
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| 169 |
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| 170 | @param StartAddress The starting address for the MMIO region to be copied from.
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| 171 | @param Length The size in bytes of the copy.
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| 172 | @param Buffer The pointer to a system memory buffer receiving the data read.
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| 173 |
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| 174 | @return Buffer.
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| 175 |
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| 176 | **/
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| 177 | UINT64 *
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| 178 | EFIAPI
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| 179 | MmioReadBuffer64 (
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| 180 | IN UINTN StartAddress,
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| 181 | IN UINTN Length,
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| 182 | OUT UINT64 *Buffer
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| 183 | )
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| 184 | {
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| 185 | UINT64 *ReturnBuffer;
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| 186 |
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| 187 | ASSERT ((StartAddress & (sizeof (UINT64) - 1)) == 0);
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| 188 |
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| 189 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 190 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 191 |
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| 192 | ASSERT ((Length & (sizeof (UINT64) - 1)) == 0);
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| 193 | ASSERT (((UINTN)Buffer & (sizeof (UINT64) - 1)) == 0);
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| 194 |
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| 195 | ReturnBuffer = Buffer;
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| 196 |
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| 197 | while (Length > 0) {
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| 198 | *(Buffer++) = MmioRead64 (StartAddress);
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| 199 | StartAddress += sizeof (UINT64);
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| 200 | Length -= sizeof (UINT64);
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| 201 | }
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| 202 |
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| 203 | return ReturnBuffer;
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| 204 | }
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| 205 |
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| 206 | /**
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| 207 | Copy data from system memory to MMIO region by using 8-bit access.
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| 208 |
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| 209 | Copy data from system memory specified by Buffer to MMIO region specified
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| 210 | by starting address StartAddress by using 8-bit access. The total number
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| 211 | of byte to be copied is specified by Length. Buffer is returned.
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| 212 |
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| 213 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 214 | If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
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| 215 |
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| 216 |
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| 217 | @param StartAddress The starting address for the MMIO region to be copied to.
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| 218 | @param Length The size in bytes of the copy.
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| 219 | @param Buffer The pointer to a system memory buffer containing the data to write.
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| 220 |
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| 221 | @return Buffer.
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| 222 |
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| 223 | **/
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| 224 | UINT8 *
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| 225 | EFIAPI
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| 226 | MmioWriteBuffer8 (
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| 227 | IN UINTN StartAddress,
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| 228 | IN UINTN Length,
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| 229 | IN CONST UINT8 *Buffer
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| 230 | )
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| 231 | {
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| 232 | VOID *ReturnBuffer;
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| 233 |
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| 234 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 235 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 236 |
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| 237 | ReturnBuffer = (UINT8 *)Buffer;
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| 238 |
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| 239 | while (Length-- > 0) {
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| 240 | MmioWrite8 (StartAddress++, *(Buffer++));
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| 241 | }
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| 242 |
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| 243 | return ReturnBuffer;
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| 244 | }
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| 245 |
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| 246 | /**
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| 247 | Copy data from system memory to MMIO region by using 16-bit access.
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| 248 |
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| 249 | Copy data from system memory specified by Buffer to MMIO region specified
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| 250 | by starting address StartAddress by using 16-bit access. The total number
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| 251 | of byte to be copied is specified by Length. Buffer is returned.
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| 252 |
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| 253 | If StartAddress is not aligned on a 16-bit boundary, then ASSERT().
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| 254 |
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| 255 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 256 | If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
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| 257 |
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| 258 | If Length is not aligned on a 16-bit boundary, then ASSERT().
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| 259 |
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| 260 | If Buffer is not aligned on a 16-bit boundary, then ASSERT().
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| 261 |
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| 262 | @param StartAddress The starting address for the MMIO region to be copied to.
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| 263 | @param Length The size in bytes of the copy.
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| 264 | @param Buffer The pointer to a system memory buffer containing the data to write.
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| 265 |
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| 266 | @return Buffer.
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| 267 |
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| 268 | **/
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| 269 | UINT16 *
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| 270 | EFIAPI
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| 271 | MmioWriteBuffer16 (
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| 272 | IN UINTN StartAddress,
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| 273 | IN UINTN Length,
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| 274 | IN CONST UINT16 *Buffer
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| 275 | )
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| 276 | {
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| 277 | UINT16 *ReturnBuffer;
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| 278 |
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| 279 | ASSERT ((StartAddress & (sizeof (UINT16) - 1)) == 0);
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| 280 |
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| 281 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 282 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 283 |
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| 284 | ASSERT ((Length & (sizeof (UINT16) - 1)) == 0);
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| 285 | ASSERT (((UINTN)Buffer & (sizeof (UINT16) - 1)) == 0);
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| 286 |
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| 287 | ReturnBuffer = (UINT16 *)Buffer;
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| 288 |
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| 289 | while (Length > 0) {
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| 290 | MmioWrite16 (StartAddress, *(Buffer++));
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| 291 |
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| 292 | StartAddress += sizeof (UINT16);
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| 293 | Length -= sizeof (UINT16);
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| 294 | }
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| 295 |
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| 296 | return ReturnBuffer;
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| 297 | }
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| 298 |
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| 299 | /**
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| 300 | Copy data from system memory to MMIO region by using 32-bit access.
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| 301 |
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| 302 | Copy data from system memory specified by Buffer to MMIO region specified
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| 303 | by starting address StartAddress by using 32-bit access. The total number
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| 304 | of byte to be copied is specified by Length. Buffer is returned.
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| 305 |
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| 306 | If StartAddress is not aligned on a 32-bit boundary, then ASSERT().
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| 307 |
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| 308 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 309 | If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
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| 310 |
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| 311 | If Length is not aligned on a 32-bit boundary, then ASSERT().
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| 312 |
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| 313 | If Buffer is not aligned on a 32-bit boundary, then ASSERT().
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| 314 |
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| 315 | @param StartAddress The starting address for the MMIO region to be copied to.
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| 316 | @param Length The size in bytes of the copy.
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| 317 | @param Buffer The pointer to a system memory buffer containing the data to write.
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| 318 |
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| 319 | @return Buffer.
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| 320 |
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| 321 | **/
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| 322 | UINT32 *
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| 323 | EFIAPI
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| 324 | MmioWriteBuffer32 (
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| 325 | IN UINTN StartAddress,
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| 326 | IN UINTN Length,
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| 327 | IN CONST UINT32 *Buffer
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| 328 | )
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| 329 | {
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| 330 | UINT32 *ReturnBuffer;
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| 331 |
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| 332 | ASSERT ((StartAddress & (sizeof (UINT32) - 1)) == 0);
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| 333 |
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| 334 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 335 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 336 |
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| 337 | ASSERT ((Length & (sizeof (UINT32) - 1)) == 0);
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| 338 | ASSERT (((UINTN)Buffer & (sizeof (UINT32) - 1)) == 0);
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| 339 |
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| 340 | ReturnBuffer = (UINT32 *)Buffer;
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| 341 |
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| 342 | while (Length > 0) {
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| 343 | MmioWrite32 (StartAddress, *(Buffer++));
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| 344 |
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| 345 | StartAddress += sizeof (UINT32);
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| 346 | Length -= sizeof (UINT32);
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| 347 | }
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| 348 |
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| 349 | return ReturnBuffer;
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| 350 | }
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| 351 |
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| 352 | /**
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| 353 | Copy data from system memory to MMIO region by using 64-bit access.
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| 354 |
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| 355 | Copy data from system memory specified by Buffer to MMIO region specified
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| 356 | by starting address StartAddress by using 64-bit access. The total number
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| 357 | of byte to be copied is specified by Length. Buffer is returned.
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| 358 |
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| 359 | If StartAddress is not aligned on a 64-bit boundary, then ASSERT().
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| 360 |
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| 361 | If Length is greater than (MAX_ADDRESS - StartAddress + 1), then ASSERT().
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| 362 | If Length is greater than (MAX_ADDRESS -Buffer + 1), then ASSERT().
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| 363 |
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| 364 | If Length is not aligned on a 64-bit boundary, then ASSERT().
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| 365 |
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| 366 | If Buffer is not aligned on a 64-bit boundary, then ASSERT().
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| 367 |
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| 368 | @param StartAddress The starting address for the MMIO region to be copied to.
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| 369 | @param Length The size in bytes of the copy.
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| 370 | @param Buffer The pointer to a system memory buffer containing the data to write.
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| 371 |
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| 372 | @return Buffer.
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| 373 |
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| 374 | **/
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| 375 | UINT64 *
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| 376 | EFIAPI
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| 377 | MmioWriteBuffer64 (
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| 378 | IN UINTN StartAddress,
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| 379 | IN UINTN Length,
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| 380 | IN CONST UINT64 *Buffer
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| 381 | )
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| 382 | {
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| 383 | UINT64 *ReturnBuffer;
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| 384 |
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| 385 | ASSERT ((StartAddress & (sizeof (UINT64) - 1)) == 0);
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| 386 |
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| 387 | ASSERT ((Length - 1) <= (MAX_ADDRESS - StartAddress));
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| 388 | ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)Buffer));
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| 389 |
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| 390 | ASSERT ((Length & (sizeof (UINT64) - 1)) == 0);
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| 391 | ASSERT (((UINTN)Buffer & (sizeof (UINT64) - 1)) == 0);
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| 392 |
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| 393 | ReturnBuffer = (UINT64 *)Buffer;
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| 394 |
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| 395 | while (Length > 0) {
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| 396 | MmioWrite64 (StartAddress, *(Buffer++));
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| 397 |
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| 398 | StartAddress += sizeof (UINT64);
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| 399 | Length -= sizeof (UINT64);
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| 400 | }
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| 401 |
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| 402 | return ReturnBuffer;
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| 403 | }
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