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@@ -0,0 +1,622 @@
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+/** @file
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+ The SioBusDxe driver is used to create child devices on the ISA bus and
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+ installs the Super I/O protocols on them.
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+
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+ Copyright (c) 2019, Intel Corporation. All rights reserved.<BR>
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+
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+ This program and the accompanying materials
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+ are licensed and made available under the terms and conditions
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+ of the BSD License which accompanies this distribution. The
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+ full text of the license may be found at
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+ http://opensource.org/licenses/bsd-license.php
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+
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+ THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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+ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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+
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+**/
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+
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+#include "SioBusDxe.h"
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+
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+//
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+// SioBus Driver Binding Protocol
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+//
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+EFI_DRIVER_BINDING_PROTOCOL gSioBusDriverBinding = {
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+ SioBusDriverBindingSupported,
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+ SioBusDriverBindingStart,
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+ SioBusDriverBindingStop,
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+ 0x10,
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+ NULL,
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+ NULL
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+};
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+
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+
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+/**
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+ Tests to see if this driver supports a given controller. If a child device is
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+ provided, it further tests to see if this driver supports creating a handle
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+ for the specified child device.
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+
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+ This function checks to see if the driver specified by This supports the
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+ device specified by ControllerHandle. Drivers will typically use the device
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+ path attached to ControllerHandle and/or the services from the bus I/O
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+ abstraction attached to ControllerHandle to determine if the driver supports
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+ ControllerHandle. This function may be called many times during platform
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+ initialization. In order to reduce boot times, the tests performed by this
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+ function must be very small, and take as little time as possible to execute.
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+ This function must not change the state of any hardware devices, and this
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+ function must be aware that the device specified by ControllerHandle may
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+ already be managed by the same driver or a different driver. This function
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+ must match its calls to AllocatePages() with FreePages(), AllocatePool() with
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+ FreePool(), and OpenProtocol() with CloseProtocol(). Since ControllerHandle
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+ may have been previously started by the same driver, if a protocol is already
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+ in the opened state, then it must not be closed with CloseProtocol(). This is
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+ required to guarantee the state of ControllerHandle is not modified by this
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+ function.
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+
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+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
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+ instance.
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+ @param[in] ControllerHandle The handle of the controller to test. This
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+ handle must support a protocol interface
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+ that supplies an I/O abstraction to the
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+ driver.
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+ @param[in] RemainingDevicePath A pointer to the remaining portion of a
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+ device path. This parameter is ignored by
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+ device drivers, and is optional for bus
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+ drivers. For bus drivers, if this parameter
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+ is not NULL, then the bus driver must
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+ determine if the bus controller specified by
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+ ControllerHandle and the child controller
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+ specified by RemainingDevicePath are both
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+ supported by this bus driver.
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+
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+ @retval EFI_SUCCESS The device specified by ControllerHandle and
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+ RemainingDevicePath is supported by the
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+ driver specified by This.
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+ @retval EFI_ALREADY_STARTED The device specified by ControllerHandle and
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+ RemainingDevicePath is already being managed
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+ by the driver specified by This.
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+ @retval EFI_ACCESS_DENIED The device specified by ControllerHandle and
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+ RemainingDevicePath is already being managed
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+ by a different driver or an application that
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+ requires exclusive access.
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+ @retval EFI_UNSUPPORTED The device specified by ControllerHandle and
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+ RemainingDevicePath is not supported by the
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+ driver specified by This.
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+
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+**/
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+EFI_STATUS
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+EFIAPI
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+SioBusDriverBindingSupported (
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+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
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+ IN EFI_HANDLE Controller,
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+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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+ )
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+{
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+ EFI_STATUS Status;
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+ EFI_PCI_IO_PROTOCOL *PciIo;
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+ PCI_TYPE00 Pci;
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+ UINTN SegmentNumber;
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+ UINTN BusNumber;
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+ UINTN DeviceNumber;
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+ UINTN FunctionNumber;
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+
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+ //
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+ // Get PciIo protocol instance
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+ //
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+ Status = gBS->OpenProtocol (
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+ Controller,
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+ &gEfiPciIoProtocolGuid,
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+ (VOID**)&PciIo,
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+ This->DriverBindingHandle,
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+ Controller,
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+ EFI_OPEN_PROTOCOL_BY_DRIVER
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+ );
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+ if (EFI_ERROR(Status)) {
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+ return Status;
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+ }
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+
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+ Status = PciIo->Pci.Read (
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+ PciIo,
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+ EfiPciIoWidthUint32,
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+ 0,
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+ sizeof(Pci) / sizeof(UINT32),
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+ &Pci);
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+
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+ if (!EFI_ERROR (Status)) {
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+ Status = EFI_UNSUPPORTED;
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+ if ((Pci.Hdr.Command & 0x03) == 0x03) {
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+ if (Pci.Hdr.ClassCode[2] == PCI_CLASS_BRIDGE) {
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+ //
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+ // See if this is a standard PCI to ISA Bridge from the Base Code and
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+ // Class Code
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+ //
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+ if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA) {
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+ Status = EFI_SUCCESS;
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+ }
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+
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+ //
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+ // See if this is an Intel PCI to ISA bridge in Positive Decode Mode
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+ //
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+ if (Pci.Hdr.ClassCode[1] == PCI_CLASS_BRIDGE_ISA_PDECODE &&
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+ Pci.Hdr.VendorId == 0x8086) {
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+ //
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+ // See if this is on Function #0 to avoid false positives on
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+ // PCI_CLASS_BRIDGE_OTHER that has the same value as
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+ // PCI_CLASS_BRIDGE_ISA_PDECODE
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+ //
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+ Status = PciIo->GetLocation (
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+ PciIo,
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+ &SegmentNumber,
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+ &BusNumber,
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+ &DeviceNumber,
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+ &FunctionNumber
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+ );
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+ if (!EFI_ERROR (Status) && FunctionNumber == 0) {
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+ Status = EFI_SUCCESS;
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+ } else {
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+ Status = EFI_UNSUPPORTED;
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+ }
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+ }
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+ }
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+ }
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+ }
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+
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+ gBS->CloseProtocol (
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+ Controller,
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+ &gEfiPciIoProtocolGuid,
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+ This->DriverBindingHandle,
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+ Controller
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+ );
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+
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+ return Status;
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+}
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+
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+/**
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+ Starts a device controller or a bus controller.
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+
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+ The Start() function is designed to be invoked from the EFI boot service
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+ ConnectController(). As a result, much of the error checking on the
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+ parameters to Start() has been moved into this common boot service. It is
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+ legal to call Start() from other locations, but the following calling
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+ restrictions must be followed or the system behavior will not be
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+ deterministic.
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+ 1. ControllerHandle must be a valid EFI_HANDLE.
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+ 2. If RemainingDevicePath is not NULL, then it must be a pointer to a
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+ naturally aligned EFI_DEVICE_PATH_PROTOCOL.
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+ 3. Prior to calling Start(), the Supported() function for the driver
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+ specified by This must have been called with the same calling parameters,
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+ and Supported() must have returned EFI_SUCCESS.
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+
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+ @param[in] This A pointer to the EFI_DRIVER_BINDING_PROTOCOL
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+ instance.
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+ @param[in] ControllerHandle The handle of the controller to start. This
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+ handle must support a protocol interface
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+ that supplies an I/O abstraction to the
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+ driver.
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+ @param[in] RemainingDevicePath A pointer to the remaining portion of a
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+ device path. This parameter is ignored by
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+ device drivers, and is optional for bus
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+ drivers. For a bus driver, if this parameter
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+ is NULL, then handles for all the children
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+ of Controller are created by this driver. If
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+ this parameter is not NULL and the first
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+ Device Path Node is not the End of Device
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+ Path Node, then only the handle for the
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+ child device specified by the first Device
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+ Path Node of RemainingDevicePath is created
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+ by this driver. If the first Device Path
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+ Node of RemainingDevicePath is the End of
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+ Device Path Node, no child handle is created
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+ by this driver.
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+
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+ @retval EFI_SUCCESS The device was started.
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+ @retval EFI_DEVICE_ERROR The device could not be started due to a
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+ device error.
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+ @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a
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+ lack of resources.
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+ @retval Others The driver failded to start the device.
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+
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+**/
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+EFI_STATUS
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+EFIAPI
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+SioBusDriverBindingStart (
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+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
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+ IN EFI_HANDLE Controller,
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+ IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath
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+ )
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+{
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+ EFI_STATUS Status;
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+ EFI_PCI_IO_PROTOCOL *PciIo;
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+ EFI_DEVICE_PATH_PROTOCOL *ParentDevicePath;
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+ UINT64 Supports;
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+ UINT64 OriginalAttributes;
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+ UINT64 Attributes;
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+ BOOLEAN Enabled;
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+ SIO_BUS_DRIVER_PRIVATE_DATA *Private;
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+ UINT32 ChildDeviceNumber;
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+
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+ Enabled = FALSE;
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+ Supports = 0;
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+ OriginalAttributes = 0;
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+ Private = NULL;
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+
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+ //
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+ // Open the PCI I/O Protocol Interface
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+ //
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+ PciIo = NULL;
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+ Status = gBS->OpenProtocol (
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+ Controller,
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+ &gEfiPciIoProtocolGuid,
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+ (VOID**) &PciIo,
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+ This->DriverBindingHandle,
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+ Controller,
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+ EFI_OPEN_PROTOCOL_BY_DRIVER
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+ );
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+ if (EFI_ERROR (Status)) {
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+ return Status;
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+ }
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+
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+ //
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+ // Open Device Path Protocol
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+ //
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+ Status = gBS->OpenProtocol (
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+ Controller,
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+ &gEfiDevicePathProtocolGuid,
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+ (VOID **) &ParentDevicePath,
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+ This->DriverBindingHandle,
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+ Controller,
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+ EFI_OPEN_PROTOCOL_BY_DRIVER
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+ );
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+ if (EFI_ERROR (Status)) {
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+ gBS->CloseProtocol (
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+ Controller,
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+ &gEfiPciIoProtocolGuid,
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+ This->DriverBindingHandle,
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+ Controller
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+ );
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+ return Status;
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+ }
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+
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+ //
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+ // Get supported PCI attributes
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+ //
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+ Status = PciIo->Attributes (
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+ PciIo,
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+ EfiPciIoAttributeOperationSupported,
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+ 0,
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+ &Supports
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+ );
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+ if (EFI_ERROR (Status)) {
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+ goto Done;
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+ }
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+
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+ Supports &= (UINT64) (EFI_PCI_IO_ATTRIBUTE_ISA_IO |
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+ EFI_PCI_IO_ATTRIBUTE_ISA_IO_16);
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+ if (Supports == 0 ||
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+ Supports == (EFI_PCI_IO_ATTRIBUTE_ISA_IO |
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+ EFI_PCI_IO_ATTRIBUTE_ISA_IO_16)) {
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+ Status = EFI_UNSUPPORTED;
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+ goto Done;
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+ }
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+
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+ Status = PciIo->Attributes (
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+ PciIo,
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+ EfiPciIoAttributeOperationGet,
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+ 0,
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+ &OriginalAttributes
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+ );
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+ if (EFI_ERROR (Status)) {
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+ goto Done;
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+ }
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+
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+ Attributes = EFI_PCI_DEVICE_ENABLE |
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+ Supports |
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+ EFI_PCI_IO_ATTRIBUTE_ISA_MOTHERBOARD_IO;
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+ Status = PciIo->Attributes (
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+ PciIo,
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+ EfiPciIoAttributeOperationEnable,
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+ Attributes,
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+ NULL
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+ );
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+ if (EFI_ERROR (Status)) {
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+ goto Done;
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+ }
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+
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+ Enabled = TRUE;
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+
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+ //
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+ // Store the OriginalAttributes for the restore in BindingStop()
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+ //
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+ Private = AllocateZeroPool (sizeof (SIO_BUS_DRIVER_PRIVATE_DATA));
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+ if (Private == NULL) {
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+ Status = EFI_OUT_OF_RESOURCES;
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+ goto Done;
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+ }
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+ Private->PciIo = PciIo;
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+ Private->OriginalAttributes = OriginalAttributes;
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+
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+ Status = gBS->InstallProtocolInterface (
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+ &Controller,
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+ &gEfiCallerIdGuid,
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+ EFI_NATIVE_INTERFACE,
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+ Private
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+ );
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+ if (EFI_ERROR (Status)) {
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+ goto Done;
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+ }
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+
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+ //
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+ // Report status code for the start of general controller initialization
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+ //
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+ REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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+ EFI_PROGRESS_CODE,
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+ (EFI_IO_BUS_LPC | EFI_IOB_PC_INIT),
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+ ParentDevicePath
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+ );
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+
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+ //
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+ // Report status code for the start of enabling devices on the bus
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+ //
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+ REPORT_STATUS_CODE_WITH_DEVICE_PATH (
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+ EFI_PROGRESS_CODE,
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+ (EFI_IO_BUS_LPC | EFI_IOB_PC_ENABLE),
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+ ParentDevicePath
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+ );
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+
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+ //
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+ // Create all the children upon the first entrance
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+ //
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+ ChildDeviceNumber = SioCreateAllChildDevices (
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+ This,
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+ Controller,
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+ PciIo,
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+ ParentDevicePath
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+ );
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+ if (ChildDeviceNumber == 0) {
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+ Status = EFI_DEVICE_ERROR;
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+ }
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+
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+Done:
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+ if (EFI_ERROR (Status)) {
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+ if (PciIo != NULL && Enabled) {
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+ PciIo->Attributes (
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+ PciIo,
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+ EfiPciIoAttributeOperationSet,
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+ OriginalAttributes,
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+ NULL
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+ );
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+ }
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+
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+ gBS->CloseProtocol (
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+ Controller,
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+ &gEfiDevicePathProtocolGuid,
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+ This->DriverBindingHandle,
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+ Controller
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+ );
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+
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+ gBS->CloseProtocol (
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+ Controller,
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+ &gEfiPciIoProtocolGuid,
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+ This->DriverBindingHandle,
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+ Controller
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+ );
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+
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+ if (Private != NULL) {
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+ gBS->UninstallMultipleProtocolInterfaces (
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+ Controller,
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+ &gEfiCallerIdGuid,
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+ Private,
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+ NULL
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+ );
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+ FreePool (Private);
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+ }
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+
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+ return Status;
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+ }
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+
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+ return EFI_SUCCESS;
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+}
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+
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|
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+/**
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|
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+ Stops a device controller or a bus controller.
|
|
|
+
|
|
|
+ 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
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|
+ in this driver's Start() function, and the Start() function must have
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+ called OpenProtocol() on ControllerHandle with an Attribute of
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+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER.
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+
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|
+ @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.
|
|
|
+
|
|
|
+**/
|
|
|
+EFI_STATUS
|
|
|
+EFIAPI
|
|
|
+SioBusDriverBindingStop (
|
|
|
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
|
|
+ IN EFI_HANDLE Controller,
|
|
|
+ IN UINTN NumberOfChildren,
|
|
|
+ IN EFI_HANDLE *ChildHandleBuffer
|
|
|
+ )
|
|
|
+{
|
|
|
+ EFI_STATUS Status;
|
|
|
+ SIO_BUS_DRIVER_PRIVATE_DATA *Private;
|
|
|
+ UINTN Index;
|
|
|
+ BOOLEAN AllChildrenStopped;
|
|
|
+ EFI_SIO_PROTOCOL *Sio;
|
|
|
+ SIO_DEV *SioDevice;
|
|
|
+ EFI_PCI_IO_PROTOCOL *PciIo;
|
|
|
+
|
|
|
+ if (NumberOfChildren == 0) {
|
|
|
+ //
|
|
|
+ // Restore PCI attributes
|
|
|
+ //
|
|
|
+ Status = gBS->OpenProtocol (
|
|
|
+ Controller,
|
|
|
+ &gEfiCallerIdGuid,
|
|
|
+ (VOID **) &Private,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ Controller,
|
|
|
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
|
+ );
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ return Status;
|
|
|
+ }
|
|
|
+
|
|
|
+ Status = Private->PciIo->Attributes (
|
|
|
+ Private->PciIo,
|
|
|
+ EfiPciIoAttributeOperationSet,
|
|
|
+ Private->OriginalAttributes,
|
|
|
+ NULL
|
|
|
+ );
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ return Status;
|
|
|
+ }
|
|
|
+
|
|
|
+ gBS->UninstallProtocolInterface (
|
|
|
+ Controller,
|
|
|
+ &gEfiCallerIdGuid,
|
|
|
+ Private
|
|
|
+ );
|
|
|
+ FreePool (Private);
|
|
|
+
|
|
|
+ //
|
|
|
+ // Close the bus driver
|
|
|
+ //
|
|
|
+ Status = gBS->CloseProtocol (
|
|
|
+ Controller,
|
|
|
+ &gEfiDevicePathProtocolGuid,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ Controller
|
|
|
+ );
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ return Status;
|
|
|
+ }
|
|
|
+
|
|
|
+ Status = gBS->CloseProtocol (
|
|
|
+ Controller,
|
|
|
+ &gEfiPciIoProtocolGuid,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ Controller
|
|
|
+ );
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ return Status;
|
|
|
+ }
|
|
|
+
|
|
|
+ return EFI_SUCCESS;
|
|
|
+ }
|
|
|
+
|
|
|
+ //
|
|
|
+ // Stop all the children
|
|
|
+ //
|
|
|
+ AllChildrenStopped = TRUE;
|
|
|
+
|
|
|
+ for (Index = 0; Index < NumberOfChildren; Index++) {
|
|
|
+ Status = gBS->OpenProtocol (
|
|
|
+ ChildHandleBuffer[Index],
|
|
|
+ &gEfiSioProtocolGuid,
|
|
|
+ (VOID **) &Sio,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ Controller,
|
|
|
+ EFI_OPEN_PROTOCOL_GET_PROTOCOL
|
|
|
+ );
|
|
|
+ if (!EFI_ERROR (Status)) {
|
|
|
+ SioDevice = SIO_DEV_FROM_SIO (Sio);
|
|
|
+
|
|
|
+ //
|
|
|
+ // Close the child handle
|
|
|
+ //
|
|
|
+ Status = gBS->CloseProtocol (
|
|
|
+ Controller,
|
|
|
+ &gEfiPciIoProtocolGuid,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ ChildHandleBuffer[Index]
|
|
|
+ );
|
|
|
+ Status = gBS->UninstallMultipleProtocolInterfaces (
|
|
|
+ ChildHandleBuffer[Index],
|
|
|
+ &gEfiDevicePathProtocolGuid,
|
|
|
+ SioDevice->DevicePath,
|
|
|
+ &gEfiSioProtocolGuid,
|
|
|
+ &SioDevice->Sio,
|
|
|
+ NULL
|
|
|
+ );
|
|
|
+
|
|
|
+ if (!EFI_ERROR (Status)) {
|
|
|
+ FreePool (SioDevice->DevicePath);
|
|
|
+ FreePool (SioDevice);
|
|
|
+ } else {
|
|
|
+ //
|
|
|
+ // Re-open PCI IO Protocol on behalf of the child device
|
|
|
+ // because of failure of destroying the child device handle
|
|
|
+ //
|
|
|
+ gBS->OpenProtocol (
|
|
|
+ Controller,
|
|
|
+ &gEfiPciIoProtocolGuid,
|
|
|
+ (VOID **) &PciIo,
|
|
|
+ This->DriverBindingHandle,
|
|
|
+ ChildHandleBuffer[Index],
|
|
|
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER
|
|
|
+ );
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (EFI_ERROR (Status)) {
|
|
|
+ AllChildrenStopped = FALSE;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ if (!AllChildrenStopped) {
|
|
|
+ return EFI_DEVICE_ERROR;
|
|
|
+ }
|
|
|
+
|
|
|
+ return EFI_SUCCESS;
|
|
|
+}
|
|
|
+
|
|
|
+/**
|
|
|
+ The entry point for the SioBusDxe driver.
|
|
|
+
|
|
|
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
|
|
|
+ @param[in] SystemTable A pointer to the EFI System Table.
|
|
|
+
|
|
|
+ @retval EFI_SUCCESS The entry point is executed successfully.
|
|
|
+ @retval other Some error occurs when executing this entry point.
|
|
|
+
|
|
|
+**/
|
|
|
+EFI_STATUS
|
|
|
+EFIAPI
|
|
|
+SioBusDxeDriverEntryPoint (
|
|
|
+ IN EFI_HANDLE ImageHandle,
|
|
|
+ IN EFI_SYSTEM_TABLE *SystemTable
|
|
|
+ )
|
|
|
+{
|
|
|
+ //
|
|
|
+ // Install driver model protocol(s).
|
|
|
+ //
|
|
|
+ return EfiLibInstallDriverBindingComponentName2 (
|
|
|
+ ImageHandle,
|
|
|
+ SystemTable,
|
|
|
+ &gSioBusDriverBinding,
|
|
|
+ ImageHandle,
|
|
|
+ &gSioBusComponentName,
|
|
|
+ &gSioBusComponentName2
|
|
|
+ );
|
|
|
+}
|