diff options
| author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-01-28 16:54:55 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2013-01-28 16:54:55 +0000 |
| commit | 29874a8c6015deff95e90e64fb9321bdc7b32a99 (patch) | |
| tree | e7737171b36cc18f2f82851727630d6135ffba19 /OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c | |
| parent | b5e243b75f22cf87d887bc41ffcddc9b7a5f8d5c (diff) | |
| download | edk2-platforms-29874a8c6015deff95e90e64fb9321bdc7b32a99.tar.xz | |
QemuFwCfgLib: Add QemuFwCfgWriteBytes() function
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14109 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c')
| -rw-r--r-- | OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c | 51 |
1 files changed, 50 insertions, 1 deletions
diff --git a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c index 8caab42e8b..7e5ea00bf9 100644 --- a/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c +++ b/OvmfPkg/Library/QemuFwCfgLib/QemuFwCfgLib.c @@ -1,6 +1,6 @@ /** @file
- Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
+ Copyright (c) 2011 - 2013, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -50,6 +50,32 @@ IoReadFifo8 ( OUT VOID *Buffer
);
+/**
+ Writes an 8-bit I/O port fifo from a block of memory.
+
+ Writes the 8-bit I/O fifo port specified by Port.
+
+ The port is written Count times, and the data are obtained
+ from the provided Buffer.
+
+ This function must guarantee that all I/O read and write operations are
+ serialized.
+
+ If 8-bit I/O port operations are not supported, then ASSERT().
+
+ @param Port The I/O port to read.
+ @param Count The number of times to read I/O port.
+ @param Buffer The buffer to store the read data into.
+
+**/
+VOID
+EFIAPI
+IoWriteFifo8 (
+ IN UINTN Port,
+ IN UINTN Count,
+ OUT VOID *Buffer
+ );
+
/**
Returns a boolean indicating if the firmware configuration interface
@@ -132,6 +158,29 @@ QemuFwCfgReadBytes ( }
}
+/**
+ Write firmware configuration bytes from a buffer
+
+ If called multiple times, then the data written will
+ continue at the offset of the firmware configuration
+ item where the previous write ended.
+
+ @param[in] Size - Size in bytes to write
+ @param[in] Buffer - Buffer to read data from
+
+**/
+VOID
+EFIAPI
+QemuFwCfgWriteBytes (
+ IN UINTN Size,
+ IN VOID *Buffer
+ )
+{
+ if (mQemuFwCfgSupported) {
+ IoWriteFifo8 (0x511, Size, Buffer);
+ }
+}
+
/**
Reads a UINT8 firmware configuration value
|