diff options
Diffstat (limited to 'StdLib/LibC/Uefi/Devices/Utility/DevGenisis.c')
| -rw-r--r-- | StdLib/LibC/Uefi/Devices/Utility/DevGenisis.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/StdLib/LibC/Uefi/Devices/Utility/DevGenisis.c b/StdLib/LibC/Uefi/Devices/Utility/DevGenisis.c new file mode 100644 index 0000000000..2bdb33ac53 --- /dev/null +++ b/StdLib/LibC/Uefi/Devices/Utility/DevGenisis.c @@ -0,0 +1,139 @@ +/** @file
+ Device Abstraction: device creation utility functions.
+
+ Copyright (c) 2011, 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 that 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.
+**/
+#include <Uefi.h>
+#include <Library/BaseLib.h>
+#include <Library/MemoryAllocationLib.h>
+
+#include <LibConfig.h>
+
+#include <errno.h>
+#include <sys/poll.h>
+#include <kfile.h>
+#include <Device/Device.h>
+#include <MainData.h>
+
+LIST_ENTRY daDeviceList = INITIALIZE_LIST_HEAD_VARIABLE(daDeviceList);
+DeviceNode *daDefaultDevice = NULL; ///< Device to use if nothing else found
+DeviceNode *daRootDevice = NULL; ///< Device containing the root file system
+DeviceNode *daCurrentDevice = NULL; ///< Device currently being accessed
+
+/* Commonly used fileops
+ fnullop_* Does nothing and returns success.
+ fbadop_* Does nothing and returns EPERM
+*/
+int fnullop_fcntl (struct __filedes *filp, UINT32 Cmd, void *p3, void *p4)
+{ return 0; }
+
+short fnullop_poll (struct __filedes *filp, short Events)
+{
+ return ((POLLIN | POLLRDNORM | POLLOUT) & Events);
+}
+
+int fnullop_flush (struct __filedes *filp)
+{ return 0; }
+
+int fbadop_stat (struct __filedes *filp, struct stat *StatBuf, void *Buf)
+{ return -EPERM; }
+
+int fbadop_ioctl (struct __filedes *filp, ULONGN Cmd, void *argp)
+{ return -EPERM; }
+
+int fbadop_delete (struct __filedes *filp)
+{ return -EPERM; }
+
+int fbadop_mkdir (const char *path, __mode_t perms)
+{ return -EPERM; }
+
+int fbadop_rename (const char *from, const char *to)
+{ return -EPERM; }
+
+int fbadop_rmdir (struct __filedes *filp)
+{ return -EPERM; }
+
+/** Add a new device to the device list.
+ If both DevName and DevProto are NULL, register this as the Default device.
+
+ @param DevName Name of the device to add.
+ @param DevProto Pointer to the GUID identifying the protocol associated with this device.
+ If DevProto is NULL, startup code will not try to find instances
+ of this device.
+ @param OpenFunc Pointer to the device's Open function.
+ @param InstanceList Optional pointer to the device's initialized instance list.
+ If InstanceList is NULL, the application startup code will
+ scan for instances of the protocol identified by DevProto and
+ populate the InstanceList in the order those protocols are found.
+ @param NumInstance Number of instances in InstanceList.
+ @param Modes Bit-mapped flags indicating operations (R, W, RW, ...) permitted to this device.
+
+**/
+DeviceNode *
+EFIAPI
+__DevRegister(
+ IN const CHAR16 *DevName,
+ IN GUID *DevProto,
+ IN FO_OPEN OpenFunc,
+ IN void *InstanceList,
+ IN int NumInstance,
+ IN UINT32 InstanceSize,
+ IN UINT32 Modes
+ )
+{
+ DeviceNode *Node;
+ GenericInstance *GIp;
+ char *GenPtr;
+ int i;
+
+ /* Validate parameters */
+ if(((DevName == NULL) && (DevProto != NULL)) ||
+ (OpenFunc == NULL)) {
+ EFIerrno = RETURN_INVALID_PARAMETER;
+ return NULL;
+ }
+ Node = (DeviceNode *)AllocateZeroPool(sizeof(DeviceNode));
+ if(Node == NULL) {
+ EFIerrno = RETURN_OUT_OF_RESOURCES;
+ return NULL;
+ }
+
+ Node->DevName = DevName;
+ Node->DevProto = DevProto;
+ Node->InstanceList = InstanceList;
+ Node->OpenFunc = OpenFunc;
+ Node->InstanceSize = InstanceSize;
+ Node->NumInstances = NumInstance;
+ Node->OpModes = Modes;
+
+ /* Update the Parent member of each element of the InstanceList */
+ if(InstanceList != NULL) {
+ GenPtr = InstanceList;
+
+ for(i = 0; i < NumInstance; ++i) { // Iterate through each element of InstanceList
+ GIp = (GenericInstance *)GenPtr;
+ GIp->Parent = Node; // Initializing the Parent member & InstanceNum
+ //GIp->InstanceNum = i;
+ GenPtr += InstanceSize;
+ }
+ }
+ if(DevName == NULL) {
+ if(daDefaultDevice != NULL) {
+ EFIerrno = RETURN_INVALID_PARAMETER;
+ return NULL;
+ }
+ daDefaultDevice = Node;
+ }
+ else {
+ (void) InsertTailList(&daDeviceList, &Node->DevList);
+ }
+ EFIerrno = RETURN_SUCCESS;
+ return Node;
+}
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