projects / mirror_edk2.git / blame
| 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 | GCC_ASM_EXPORT(MmioRead8Internal)\r | |
| 9 | GCC_ASM_EXPORT(MmioWrite8Internal)\r | |
| 10 | GCC_ASM_EXPORT(MmioRead16Internal)\r | |
| 11 | GCC_ASM_EXPORT(MmioWrite16Internal)\r | |
| 12 | GCC_ASM_EXPORT(MmioRead32Internal)\r | |
| 13 | GCC_ASM_EXPORT(MmioWrite32Internal)\r | |
| 14 | GCC_ASM_EXPORT(MmioRead64Internal)\r | |
| 15 | GCC_ASM_EXPORT(MmioWrite64Internal)\r | |
| 16 | \r | |
| 17 | //\r | |
| 18 | // Reads an 8-bit MMIO register.\r | |
| 19 | //\r | |
| 20 | // Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
| 21 | // returned. This function must guarantee that all MMIO read and write\r | |
| 22 | // operations are serialized.\r | |
| 23 | //\r | |
| 24 | // @param Address The MMIO register to read.\r | |
| 25 | //\r | |
| 26 | // @return The value read.\r | |
| 27 | //\r | |
| 28 | ASM_PFX(MmioRead8Internal):\r | |
| 29 | ldrb r0, [r0]\r | |
| 30 | dmb\r | |
| 31 | bx lr\r | |
| 32 | \r | |
| 33 | //\r | |
| 34 | // Writes an 8-bit MMIO register.\r | |
| 35 | //\r | |
| 36 | // Writes the 8-bit MMIO register specified by Address with the value specified\r | |
| 37 | // by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 38 | // and write operations are serialized.\r | |
| 39 | //\r | |
| 40 | // @param Address The MMIO register to write.\r | |
| 41 | // @param Value The value to write to the MMIO register.\r | |
| 42 | //\r | |
| 43 | ASM_PFX(MmioWrite8Internal):\r | |
| 44 | dmb st\r | |
| 45 | strb r1, [r0]\r | |
| 46 | bx lr\r | |
| 47 | \r | |
| 48 | //\r | |
| 49 | // Reads a 16-bit MMIO register.\r | |
| 50 | //\r | |
| 51 | // Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
| 52 | // returned. This function must guarantee that all MMIO read and write\r | |
| 53 | // operations are serialized.\r | |
| 54 | //\r | |
| 55 | // @param Address The MMIO register to read.\r | |
| 56 | //\r | |
| 57 | // @return The value read.\r | |
| 58 | //\r | |
| 59 | ASM_PFX(MmioRead16Internal):\r | |
| 60 | ldrh r0, [r0]\r | |
| 61 | dmb\r | |
| 62 | bx lr\r | |
| 63 | \r | |
| 64 | //\r | |
| 65 | // Writes a 16-bit MMIO register.\r | |
| 66 | //\r | |
| 67 | // Writes the 16-bit MMIO register specified by Address with the value specified\r | |
| 68 | // by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 69 | // and write operations are serialized.\r | |
| 70 | //\r | |
| 71 | // @param Address The MMIO register to write.\r | |
| 72 | // @param Value The value to write to the MMIO register.\r | |
| 73 | //\r | |
| 74 | ASM_PFX(MmioWrite16Internal):\r | |
| 75 | dmb st\r | |
| 76 | strh r1, [r0]\r | |
| 77 | bx lr\r | |
| 78 | \r | |
| 79 | //\r | |
| 80 | // Reads a 32-bit MMIO register.\r | |
| 81 | //\r | |
| 82 | // Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
| 83 | // returned. This function must guarantee that all MMIO read and write\r | |
| 84 | // operations are serialized.\r | |
| 85 | //\r | |
| 86 | // @param Address The MMIO register to read.\r | |
| 87 | //\r | |
| 88 | // @return The value read.\r | |
| 89 | //\r | |
| 90 | ASM_PFX(MmioRead32Internal):\r | |
| 91 | ldr r0, [r0]\r | |
| 92 | dmb\r | |
| 93 | bx lr\r | |
| 94 | \r | |
| 95 | //\r | |
| 96 | // Writes a 32-bit MMIO register.\r | |
| 97 | //\r | |
| 98 | // Writes the 32-bit MMIO register specified by Address with the value specified\r | |
| 99 | // by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 100 | // and write operations are serialized.\r | |
| 101 | //\r | |
| 102 | // @param Address The MMIO register to write.\r | |
| 103 | // @param Value The value to write to the MMIO register.\r | |
| 104 | //\r | |
| 105 | ASM_PFX(MmioWrite32Internal):\r | |
| 106 | dmb st\r | |
| 107 | str r1, [r0]\r | |
| 108 | bx lr\r | |
| 109 | \r | |
| 110 | //\r | |
| 111 | // Reads a 64-bit MMIO register.\r | |
| 112 | //\r | |
| 113 | // Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
| 114 | // returned. This function must guarantee that all MMIO read and write\r | |
| 115 | // operations are serialized.\r | |
| 116 | //\r | |
| 117 | // @param Address The MMIO register to read.\r | |
| 118 | //\r | |
| 119 | // @return The value read.\r | |
| 120 | //\r | |
| 121 | ASM_PFX(MmioRead64Internal):\r | |
| 9cabe9d4 AB |
122 | ldr r1, [r0, #4]\r |
| 123 | ldr r0, [r0]\r | |
| 9095d37b LG |
124 | dmb\r |
| 125 | bx lr\r | |
| 126 | \r | |
| 127 | //\r | |
| 128 | // Writes a 64-bit MMIO register.\r | |
| 129 | //\r | |
| 130 | // Writes the 64-bit MMIO register specified by Address with the value specified\r | |
| 131 | // by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 132 | // and write operations are serialized.\r | |
| 133 | //\r | |
| 134 | // @param Address The MMIO register to write.\r | |
| 135 | // @param Value The value to write to the MMIO register.\r | |
| 136 | //\r | |
| 137 | ASM_PFX(MmioWrite64Internal):\r | |
| 138 | dmb st\r | |
| 9cabe9d4 AB |
139 | str r2, [r0]\r |
| 140 | str r3, [r0, #4]\r | |
| 9095d37b | 141 | bx lr\r |