IsaDriver.h revision 4fd606d1f5abe38e1f42c38de1d2e895166bd0f4
2N/A The header file for ISA driver 2N/ACopyright (c) 2010, Intel Corporation. All rights reserved.<BR> 2N/AThis program and the accompanying materials 2N/Aare licensed and made available under the terms and conditions of the BSD License 2N/Awhich accompanies this distribution. The full text of the license may be found at 2N/ATHE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 2N/AWITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 2N/A// 8237 DMA registers // ISA I/O Device Structure // Mapping structure for performing ISA DMA to a buffer above 16 MB // EFI Driver Binding Protocol Interface Functions Tests to see if a controller can be managed by the ISA Driver. How the Start() function of a driver is implemented can affect how the Supported() function is implemented. @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. @param[in] Controller The handle of the controller to test. @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. @retval EFI_SUCCESS The device is supported by this driver. @retval EFI_ALREADY_STARTED The device is already being managed by this driver. @retval EFI_ACCESS_DENIED The device is already being managed by a different driver or an application that requires exclusive access. @retval EFI_UNSUPPORTED The device is is not supported by this driver. Start this driver on ControllerHandle. The Start() function is designed to be invoked from the EFI boot service ConnectController(). As a result, much of the error checking on the parameters to Start() has been moved into this common boot service. It is legal to call Start() from other locations, but the following calling restrictions must be followed or the system behavior will not be deterministic. 1. ControllerHandle must be a valid EFI_HANDLE. 2. If RemainingDevicePath is not NULL, then it must be a pointer to a naturally aligned EFI_DEVICE_PATH_PROTOCOL. 3. Prior to calling Start(), the Supported() function for the driver specified by This must have been called with the same calling parameters, and Supported() must have returned EFI_SUCCESS. @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. @param[in] ControllerHandle The handle of the controller to start. This handle must support a protocol interface that supplies an I/O abstraction to the driver. @param[in] RemainingDevicePath A pointer to the remaining portion of a device path. This parameter is ignored by device drivers, and is optional for bus drivers. @retval EFI_SUCCESS The device was started. @retval EFI_DEVICE_ERROR The device could not be started due to a device error. Currently not implemented. @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources. @retval Others The driver failded to start the device. Stop this driver on ControllerHandle. The Stop() function is designed to be invoked from the EFI boot service DisconnectController(). As a result, much of the error checking on the parameters to Stop() has been moved into this common boot service. It is legal to call Stop() from other locations, but the following calling restrictions must be followed or the system behavior will not be deterministic. 1. ControllerHandle must be a valid EFI_HANDLE that was used on a previous call to this same driver's Start() function. 2. The first NumberOfChildren handles of ChildHandleBuffer must all be a valid EFI_HANDLE. In addition, all of these handles must have been created in this driver's Start() function, and the Start() function must have called OpenProtocol() on ControllerHandle with an Attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER. @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL instance. @param[in] ControllerHandle A handle to the device being stopped. The handle must support a bus specific I/O protocol for the driver to use to stop the device. @param[in] NumberOfChildren The number of child device handles in ChildHandleBuffer. @param[in] ChildHandleBuffer An array of child handles to be freed. May be NULL if NumberOfChildren is 0. @retval EFI_SUCCESS The device was stopped. @retval EFI_DEVICE_ERROR The device could not be stopped due to a device error. Initializes an ISA I/O Instance @param[in] IsaIoDevice The isa device to be initialized. @param[in] DevicePath The device path of the isa device. @param[in] Resources The ACPI resource list.