]>
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 | 6 | \r |
b26f0cf9 | 7 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
5297c0bf LE |
8 | \r |
9 | **/\r | |
10 | \r | |
11 | #ifndef __QEMU_FW_CFG_LIB_INTERNAL_H__\r | |
12 | #define __QEMU_FW_CFG_LIB_INTERNAL_H__\r | |
13 | \r | |
14 | /**\r | |
15 | Returns a boolean indicating if the firmware configuration interface is\r | |
16 | available for library-internal purposes.\r | |
17 | \r | |
18 | This function never changes fw_cfg state.\r | |
19 | \r | |
20 | @retval TRUE The interface is available internally.\r | |
21 | @retval FALSE The interface is not available internally.\r | |
22 | **/\r | |
23 | BOOLEAN\r | |
24 | InternalQemuFwCfgIsAvailable (\r | |
25 | VOID\r | |
26 | );\r | |
27 | \r | |
2c8dcbc6 LE |
28 | \r |
29 | /**\r | |
30 | Returns a boolean indicating whether QEMU provides the DMA-like access method\r | |
31 | for fw_cfg.\r | |
32 | \r | |
33 | @retval TRUE The DMA-like access method is available.\r | |
34 | @retval FALSE The DMA-like access method is unavailable.\r | |
35 | **/\r | |
36 | BOOLEAN\r | |
37 | InternalQemuFwCfgDmaIsAvailable (\r | |
38 | VOID\r | |
39 | );\r | |
40 | \r | |
b049655d | 41 | /**\r |
f6c909ae BS |
42 | Transfer an array of bytes, or skip a number of bytes, using the DMA\r |
43 | interface.\r | |
b049655d | 44 | \r |
f6c909ae | 45 | @param[in] Size Size in bytes to transfer or skip.\r |
b049655d | 46 | \r |
f6c909ae BS |
47 | @param[in,out] Buffer Buffer to read data into or write data from. Ignored,\r |
48 | and may be NULL, if Size is zero, or Control is\r | |
49 | FW_CFG_DMA_CTL_SKIP.\r | |
b049655d | 50 | \r |
f6c909ae BS |
51 | @param[in] Control One of the following:\r |
52 | FW_CFG_DMA_CTL_WRITE - write to fw_cfg from Buffer.\r | |
53 | FW_CFG_DMA_CTL_READ - read from fw_cfg into Buffer.\r | |
54 | FW_CFG_DMA_CTL_SKIP - skip bytes in fw_cfg.\r | |
b049655d BS |
55 | **/\r |
56 | VOID\r | |
f6c909ae BS |
57 | InternalQemuFwCfgDmaBytes (\r |
58 | IN UINT32 Size,\r | |
59 | IN OUT VOID *Buffer OPTIONAL,\r | |
60 | IN UINT32 Control\r | |
b049655d BS |
61 | );\r |
62 | \r | |
5297c0bf | 63 | #endif\r |