projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| 5297c0bf LE |
1 | /** @file\r |
| 2 | Internal interfaces specific to the QemuFwCfgLib instances in OvmfPkg.\r | |
| 3 | \r | |
| 4 | Copyright (C) 2016, Red Hat, Inc.\r | |
| b049655d | 5 | Copyright (C) 2017, Advanced Micro Devices. All rights reserved\r |
| 5297c0bf LE |
6 | \r |
| 7 | This program and the accompanying materials are licensed and made available\r | |
| 8 | under the terms and conditions of the BSD License which accompanies this\r | |
| 9 | distribution. The full text of the license may be found at\r | |
| 10 | http://opensource.org/licenses/bsd-license.php\r | |
| 11 | \r | |
| 12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, WITHOUT\r | |
| 13 | WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
| 14 | \r | |
| 15 | **/\r | |
| 16 | \r | |
| 17 | #ifndef __QEMU_FW_CFG_LIB_INTERNAL_H__\r | |
| 18 | #define __QEMU_FW_CFG_LIB_INTERNAL_H__\r | |
| 19 | \r | |
| 20 | /**\r | |
| 21 | Returns a boolean indicating if the firmware configuration interface is\r | |
| 22 | available for library-internal purposes.\r | |
| 23 | \r | |
| 24 | This function never changes fw_cfg state.\r | |
| 25 | \r | |
| 26 | @retval TRUE The interface is available internally.\r | |
| 27 | @retval FALSE The interface is not available internally.\r | |
| 28 | **/\r | |
| 29 | BOOLEAN\r | |
| 30 | InternalQemuFwCfgIsAvailable (\r | |
| 31 | VOID\r | |
| 32 | );\r | |
| 33 | \r | |
| 2c8dcbc6 LE |
34 | \r |
| 35 | /**\r | |
| 36 | Returns a boolean indicating whether QEMU provides the DMA-like access method\r | |
| 37 | for fw_cfg.\r | |
| 38 | \r | |
| 39 | @retval TRUE The DMA-like access method is available.\r | |
| 40 | @retval FALSE The DMA-like access method is unavailable.\r | |
| 41 | **/\r | |
| 42 | BOOLEAN\r | |
| 43 | InternalQemuFwCfgDmaIsAvailable (\r | |
| 44 | VOID\r | |
| 45 | );\r | |
| 46 | \r | |
| b049655d BS |
47 | /**\r |
| 48 | Returns a boolean indicating whether SEV support is enabled\r | |
| 49 | \r | |
| 50 | @retval TRUE SEV is enabled\r | |
| 51 | @retval FALSE SEV is disabled\r | |
| 52 | **/\r | |
| 53 | BOOLEAN\r | |
| 54 | InternalQemuFwCfgSevIsEnabled (\r | |
| 55 | VOID\r | |
| 56 | );\r | |
| 57 | \r | |
| 58 | /**\r | |
| 59 | Allocate a bounce buffer for SEV DMA.\r | |
| 60 | \r | |
| 61 | @param[out] Buffer Allocated DMA Buffer pointer\r | |
| 62 | @param[in] NumPage Number of pages.\r | |
| 63 | \r | |
| 64 | **/\r | |
| 65 | VOID\r | |
| 66 | InternalQemuFwCfgSevDmaAllocateBuffer (\r | |
| 67 | OUT VOID **Buffer,\r | |
| 68 | IN UINT32 NumPages\r | |
| 69 | );\r | |
| 70 | \r | |
| 71 | /**\r | |
| 72 | Free the DMA buffer allocated using InternalQemuFwCfgSevDmaAllocateBuffer\r | |
| 73 | \r | |
| 74 | @param[in] NumPage Number of pages.\r | |
| 75 | @param[in] Buffer DMA Buffer pointer\r | |
| 76 | \r | |
| 77 | **/\r | |
| 78 | VOID\r | |
| 79 | InternalQemuFwCfgSevDmaFreeBuffer (\r | |
| 80 | IN VOID *Buffer,\r | |
| 81 | IN UINT32 NumPages\r | |
| 82 | );\r | |
| 5297c0bf | 83 | #endif\r |