diff options
| author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-03-21 00:33:59 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-03-21 00:33:59 +0000 |
| commit | b0f5144676fa47f89ccff6db63173d5d456a4f0e (patch) | |
| tree | 2d676c1138030f0f9bce0c95ac642e2d294b299d /OvmfPkg/Include | |
| parent | fa4aade06e54edcb7f2973413c538680ccf70f19 (diff) | |
| download | edk2-platforms-b0f5144676fa47f89ccff6db63173d5d456a4f0e.tar.xz | |
OVMF: Add Block MMIO protocol definition
This protocol is similar to the standard UEFI BlockIo protocol,
except it has no function calls and simply defines a base address
in memory where reads & writes for the block device should occur.
One planned usage is to fill a memory region with a small disk
image, and allow it to be used as a normal disk by the
standard drivers.
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@10295 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Include')
| -rw-r--r-- | OvmfPkg/Include/Protocol/BlockMmio.h | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/OvmfPkg/Include/Protocol/BlockMmio.h b/OvmfPkg/Include/Protocol/BlockMmio.h new file mode 100644 index 0000000000..3616464200 --- /dev/null +++ b/OvmfPkg/Include/Protocol/BlockMmio.h @@ -0,0 +1,50 @@ +/** @file
+ Block IO (memory mapped)
+
+ Copyright (c) 2006 - 2010, Intel Corporation
+ All rights reserved. This program and the accompanying materials
+ are licensed and made available under the terms and conditions of the BSD License
+ which accompanies this distribution. The full text of the license may be found at
+ http://opensource.org/licenses/bsd-license.php
+
+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __BLOCK_MMIO_H__
+#define __BLOCK_MMIO_H__
+
+#include <Protocol/BlockIo.h>
+
+#define BLOCK_MMIO_PROTOCOL_GUID \
+ { \
+ 0x6b558ce3, 0x69e5, 0x4c67, {0xa6, 0x34, 0xf7, 0xfe, 0x72, 0xad, 0xbe, 0x84 } \
+ }
+
+typedef struct _BLOCK_MMIO_PROTOCOL BLOCK_MMIO_PROTOCOL;
+
+
+///
+/// This protocol provides control over block devices.
+///
+struct _BLOCK_MMIO_PROTOCOL {
+ ///
+ /// The revision to which the block IO interface adheres. All future
+ /// revisions must be backwards compatible. If a future version is not
+ /// back wards compatible, it is not the same GUID.
+ ///
+ UINT64 Revision;
+ ///
+ /// Pointer to the EFI_BLOCK_IO_MEDIA data for this device.
+ ///
+ EFI_BLOCK_IO_MEDIA *Media;
+
+ EFI_PHYSICAL_ADDRESS BaseAddress;
+
+};
+
+extern EFI_GUID gBlockMmioProtocolGuid;
+
+#endif
+
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