mirror of
https://github.com/acidanthera/audk.git
synced 2025-11-04 05:25:45 +01:00
aa950314c7
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@8139 6f19259b-4bc3-4df7-8a09-765794883524
1533 lines
48 KiB
C
1533 lines
48 KiB
C
/**@file
|
|
The implementation for EFI_ISA_IO_PROTOCOL.
|
|
|
|
Copyright (c) 2006 - 2007, Intel Corporation.<BR>
|
|
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.
|
|
|
|
**/
|
|
|
|
#include "InternalIsaIo.h"
|
|
|
|
//
|
|
// Driver Support Global Variables
|
|
//
|
|
EFI_ISA_IO_PROTOCOL IsaIoInterface = {
|
|
{
|
|
IsaIoMemRead,
|
|
IsaIoMemWrite
|
|
},
|
|
{
|
|
IsaIoIoRead,
|
|
IsaIoIoWrite
|
|
},
|
|
IsaIoCopyMem,
|
|
IsaIoMap,
|
|
IsaIoUnmap,
|
|
IsaIoAllocateBuffer,
|
|
IsaIoFreeBuffer,
|
|
IsaIoFlush,
|
|
NULL,
|
|
0,
|
|
NULL
|
|
};
|
|
|
|
EFI_ISA_DMA_REGISTERS DmaRegisters[8] = {
|
|
{
|
|
0x00,
|
|
0x87,
|
|
0x01
|
|
},
|
|
{
|
|
0x02,
|
|
0x83,
|
|
0x03
|
|
},
|
|
{
|
|
0x04,
|
|
0x81,
|
|
0x05
|
|
},
|
|
{
|
|
0x06,
|
|
0x82,
|
|
0x07
|
|
},
|
|
{
|
|
0x00,
|
|
0x00,
|
|
0x00
|
|
}, // Channel 4 is invalid
|
|
{
|
|
0xC4,
|
|
0x8B,
|
|
0xC6
|
|
},
|
|
{
|
|
0xC8,
|
|
0x89,
|
|
0xCA
|
|
},
|
|
{
|
|
0xCC,
|
|
0x8A,
|
|
0xCE
|
|
},
|
|
};
|
|
|
|
/**
|
|
report a error Status code of PCI bus driver controller
|
|
|
|
@param Code - The error status code.
|
|
|
|
@return EFI_SUCCESS - Success to report status code.
|
|
**/
|
|
EFI_STATUS
|
|
ReportErrorStatusCode (
|
|
EFI_STATUS_CODE_VALUE Code
|
|
)
|
|
|
|
{
|
|
return REPORT_STATUS_CODE (
|
|
EFI_ERROR_CODE | EFI_ERROR_MINOR,
|
|
Code
|
|
);
|
|
}
|
|
|
|
//
|
|
// Driver Support Functions
|
|
//
|
|
/**
|
|
|
|
Initializes an ISA I/O Instance
|
|
|
|
@param IsaIoDevice - The iso device to be initialized.
|
|
@param IsaDeviceResourceList - The resource list.
|
|
|
|
@retval EFI_SUCCESS - Initial success.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
InitializeIsaIoInstance (
|
|
IN ISA_IO_DEVICE *IsaIoDevice,
|
|
IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList
|
|
)
|
|
{
|
|
//
|
|
// Initializes an ISA I/O Instance
|
|
//
|
|
CopyMem (
|
|
&IsaIoDevice->IsaIo,
|
|
&IsaIoInterface,
|
|
sizeof (EFI_ISA_IO_PROTOCOL)
|
|
);
|
|
|
|
IsaIoDevice->IsaIo.ResourceList = IsaDeviceResourceList;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Performs an ISA I/O Read Cycle
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Width - Signifies the width of the I/O operation.
|
|
@param Offset - The offset in ISA I/O space to start the I/O operation.
|
|
@param Count - The number of I/O operations to perform.
|
|
@param Buffer - The destination buffer to store the results
|
|
|
|
@retval EFI_SUCCESS - The data was read from the device sucessfully.
|
|
@retval EFI_UNSUPPORTED - The Offset is not valid for this device.
|
|
@retval EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoIoRead (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINT32 Offset,
|
|
IN UINTN Count,
|
|
IN OUT VOID *Buffer
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Verify Isa IO Access
|
|
//
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeIo,
|
|
Width,
|
|
Count,
|
|
&Offset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Call PciIo->Io.Read
|
|
//
|
|
Status = IsaIoDevice->PciIo->Io.Read (
|
|
IsaIoDevice->PciIo,
|
|
(EFI_PCI_IO_PROTOCOL_WIDTH) Width,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
Offset,
|
|
Count,
|
|
Buffer
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Performs an ISA I/O Write Cycle
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Width - Signifies the width of the I/O operation.
|
|
@param Offset - The offset in ISA I/O space to start the I/O operation.
|
|
@param Count - The number of I/O operations to perform.
|
|
@param Buffer - The source buffer to write data from
|
|
|
|
@retval EFI_SUCCESS - The data was writen to the device sucessfully.
|
|
@retval EFI_UNSUPPORTED - The Offset is not valid for this device.
|
|
@retval EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoIoWrite (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINT32 Offset,
|
|
IN UINTN Count,
|
|
IN OUT VOID *Buffer
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Verify Isa IO Access
|
|
//
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeIo,
|
|
Width,
|
|
Count,
|
|
&Offset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Call PciIo->Io.Write
|
|
//
|
|
Status = IsaIoDevice->PciIo->Io.Write (
|
|
IsaIoDevice->PciIo,
|
|
(EFI_PCI_IO_PROTOCOL_WIDTH) Width,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
Offset,
|
|
Count,
|
|
Buffer
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Writes an 8 bit I/O Port
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Offset - The offset in ISA IO space to start the IO operation.
|
|
@param Value - The data to write port.
|
|
|
|
@retval EFI_SUCCESS - Success.
|
|
@retval EFI_INVALID_PARAMETER - Parameter is invalid.
|
|
@retval EFI_UNSUPPORTED - The address range specified by Offset is not valid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
WritePort (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN UINT32 Offset,
|
|
IN UINT8 Value
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Call PciIo->Io.Write
|
|
//
|
|
Status = IsaIoDevice->PciIo->Io.Write (
|
|
IsaIoDevice->PciIo,
|
|
EfiPciIoWidthUint8,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
Offset,
|
|
1,
|
|
&Value
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
return Status;
|
|
}
|
|
|
|
gBS->Stall (50);
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Writes I/O operation base address and count number to a 8 bit I/O Port.
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param AddrOffset - The address' offset.
|
|
@param PageOffset - The page's offest.
|
|
@param CountOffset - The count's offset.
|
|
@param BaseAddress - The base address.
|
|
@param Count - The number of I/O operations to perform.
|
|
|
|
@retval EFI_SUCCESS - Success.
|
|
@retval EFI_INVALID_PARAMETER - Parameter is invalid.
|
|
@retval EFI_UNSUPPORTED - The address range specified by these Offsets and Count is not valid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
WriteDmaPort (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN UINT32 AddrOffset,
|
|
IN UINT32 PageOffset,
|
|
IN UINT32 CountOffset,
|
|
IN UINT32 BaseAddress,
|
|
IN UINT16 Count
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
|
|
Status = WritePort (This, AddrOffset, (UINT8) (BaseAddress & 0xff));
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, AddrOffset, (UINT8) ((BaseAddress >> 8) & 0xff));
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, PageOffset, (UINT8) ((BaseAddress >> 16) & 0xff));
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, CountOffset, (UINT8) (Count & 0xff));
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, CountOffset, (UINT8) ((Count >> 8) & 0xff));
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Unmaps a memory region for DMA
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Mapping - The mapping value returned from EFI_ISA_IO.Map().
|
|
|
|
@retval EFI_SUCCESS - The range was unmapped.
|
|
@retval EFI_DEVICE_ERROR - The data was not committed to the target system memory.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoUnmap (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN VOID *Mapping
|
|
)
|
|
{
|
|
ISA_MAP_INFO *IsaMapInfo;
|
|
|
|
//
|
|
// Unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportDma)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
//
|
|
// See if the Map() operation associated with this Unmap() required a mapping
|
|
// buffer.If a mapping buffer was not required, then this function simply
|
|
// returns EFI_SUCCESS.
|
|
//
|
|
if (Mapping != NULL) {
|
|
//
|
|
// Get the MAP_INFO structure from Mapping
|
|
//
|
|
IsaMapInfo = (ISA_MAP_INFO *) Mapping;
|
|
|
|
//
|
|
// If this is a write operation from the Agent's point of view,
|
|
// then copy the contents of the mapped buffer into the real buffer
|
|
// so the processor can read the contents of the real buffer.
|
|
//
|
|
if (IsaMapInfo->Operation == EfiIsaIoOperationBusMasterWrite) {
|
|
CopyMem (
|
|
(VOID *) (UINTN) IsaMapInfo->HostAddress,
|
|
(VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
|
|
IsaMapInfo->NumberOfBytes
|
|
);
|
|
}
|
|
//
|
|
// Free the mapped buffer and the MAP_INFO structure.
|
|
//
|
|
gBS->FreePages (IsaMapInfo->MappedHostAddress, IsaMapInfo->NumberOfPages);
|
|
gBS->FreePool (IsaMapInfo);
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Flushes a DMA buffer
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
|
|
@retval EFI_SUCCESS - The buffers were flushed.
|
|
@retval EFI_DEVICE_ERROR - The buffers were not flushed due to a hardware error.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoFlush (
|
|
IN EFI_ISA_IO_PROTOCOL *This
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Call PciIo->Flush
|
|
//
|
|
Status = IsaIoDevice->PciIo->Flush (IsaIoDevice->PciIo);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Verifies access to an ISA device
|
|
|
|
@param IsaIoDevice - The ISA device to be verified.
|
|
@param Type - The Access type. The input must be either IsaAccessTypeMem or IsaAccessTypeIo.
|
|
@param Width - Signifies the width of the memory operation.
|
|
@param Count - The number of memory operations to perform.
|
|
@param Offset - The offset in ISA memory space to start the memory operation.
|
|
|
|
@retval EFI_SUCCESS - Verify success.
|
|
@retval EFI_INVALID_PARAMETER - One of the parameters has an invalid value.
|
|
@retval EFI_UNSUPPORTED - The device ont support the access type.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
IsaIoVerifyAccess (
|
|
IN ISA_IO_DEVICE *IsaIoDevice,
|
|
IN ISA_ACCESS_TYPE Type,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINTN Count,
|
|
IN OUT UINT32 *Offset
|
|
)
|
|
|
|
{
|
|
EFI_ISA_ACPI_RESOURCE *Item;
|
|
EFI_STATUS Status;
|
|
|
|
if (Width < EfiIsaIoWidthUint8 ||
|
|
Width >= EfiIsaIoWidthMaximum ||
|
|
Width == EfiIsaIoWidthReserved ||
|
|
Width == EfiIsaIoWidthFifoReserved ||
|
|
Width == EfiIsaIoWidthFillReserved
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// If Width is EfiIsaIoWidthFifoUintX then convert to EfiIsaIoWidthUintX
|
|
// If Width is EfiIsaIoWidthFillUintX then convert to EfiIsaIoWidthUintX
|
|
//
|
|
if (Width >= EfiIsaIoWidthFifoUint8 && Width <= EfiIsaIoWidthFifoReserved) {
|
|
Count = 1;
|
|
}
|
|
|
|
Width = (EFI_ISA_IO_PROTOCOL_WIDTH) (Width & 0x03);
|
|
|
|
Status = EFI_UNSUPPORTED;
|
|
Item = IsaIoDevice->IsaIo.ResourceList->ResourceItem;
|
|
while (Item->Type != EfiIsaAcpiResourceEndOfList) {
|
|
if ((Type == IsaAccessTypeMem && Item->Type == EfiIsaAcpiResourceMemory) ||
|
|
(Type == IsaAccessTypeIo && Item->Type == EfiIsaAcpiResourceIo)
|
|
) {
|
|
if (*Offset >= Item->StartRange && (*Offset + Count * (UINT32)(1 << Width)) - 1 <= Item->EndRange) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
if (*Offset >= Item->StartRange && *Offset <= Item->EndRange) {
|
|
Status = EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
|
|
Item++;
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
|
|
Performs an ISA Memory Read Cycle
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Width - Signifies the width of the memory operation.
|
|
@param Offset - The offset in ISA memory space to start the memory operation.
|
|
@param Count - The number of memory operations to perform.
|
|
@param Buffer - The destination buffer to store the results
|
|
|
|
@retval EFI_SUCCESS - The data was read from the device successfully.
|
|
@retval EFI_UNSUPPORTED - The Offset is not valid for this device.
|
|
@retval EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoMemRead (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINT32 Offset,
|
|
IN UINTN Count,
|
|
IN OUT VOID *Buffer
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
//
|
|
// Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
//
|
|
// So we just return EFI_UNSUPPORTED for these functions.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Verify the Isa Io Access
|
|
//
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeMem,
|
|
Width,
|
|
Count,
|
|
&Offset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Call PciIo->Mem.Read
|
|
//
|
|
Status = IsaIoDevice->PciIo->Mem.Read (
|
|
IsaIoDevice->PciIo,
|
|
(EFI_PCI_IO_PROTOCOL_WIDTH) Width,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
Offset,
|
|
Count,
|
|
Buffer
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Performs an ISA Memory Write Cycle
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Width - Signifies the width of the memory operation.
|
|
@param Offset - The offset in ISA memory space to start the memory operation.
|
|
@param Count - The number of memory operations to perform.
|
|
@param Buffer - The source buffer to write data from
|
|
|
|
@retval EFI_SUCCESS - The data was written to the device sucessfully.
|
|
@retval EFI_UNSUPPORTED - The Offset is not valid for this device.
|
|
@retval EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoMemWrite (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINT32 Offset,
|
|
IN UINTN Count,
|
|
IN OUT VOID *Buffer
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
//
|
|
// Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
//
|
|
// So we just return EFI_UNSUPPORTED for these functions.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Verify Isa IO Access
|
|
//
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeMem,
|
|
Width,
|
|
Count,
|
|
&Offset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Call PciIo->Mem.Write
|
|
//
|
|
Status = IsaIoDevice->PciIo->Mem.Write (
|
|
IsaIoDevice->PciIo,
|
|
(EFI_PCI_IO_PROTOCOL_WIDTH) Width,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
Offset,
|
|
Count,
|
|
Buffer
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Performs an ISA I/O Copy Memory
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Width - Signifies the width of the memory copy operation.
|
|
@param DestOffset - The offset of the destination
|
|
@param SrcOffset - The offset of the source
|
|
@param Count - The number of memory copy operations to perform
|
|
|
|
@retval EFI_SUCCESS - The data was copied sucessfully.
|
|
@retval EFI_UNSUPPORTED - The DestOffset or SrcOffset is not valid for this device.
|
|
@retval EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.
|
|
@retval EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoCopyMem (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_WIDTH Width,
|
|
IN UINT32 DestOffset,
|
|
IN UINT32 SrcOffset,
|
|
IN UINTN Count
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
ISA_IO_DEVICE *IsaIoDevice;
|
|
|
|
//
|
|
// Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
//
|
|
// So we just return EFI_UNSUPPORTED for these functions.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);
|
|
|
|
//
|
|
// Verify Isa IO Access for destination and source
|
|
//
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeMem,
|
|
Width,
|
|
Count,
|
|
&DestOffset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = IsaIoVerifyAccess (
|
|
IsaIoDevice,
|
|
IsaAccessTypeMem,
|
|
Width,
|
|
Count,
|
|
&SrcOffset
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
//
|
|
// Call PciIo->CopyMem
|
|
//
|
|
Status = IsaIoDevice->PciIo->CopyMem (
|
|
IsaIoDevice->PciIo,
|
|
(EFI_PCI_IO_PROTOCOL_WIDTH) Width,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
DestOffset,
|
|
EFI_PCI_IO_PASS_THROUGH_BAR,
|
|
SrcOffset,
|
|
Count
|
|
);
|
|
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
Maps a memory region for DMA, note this implementation
|
|
only supports slave read/write operation to save code size.
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Operation - Indicates the type of DMA (slave or bus master), and if
|
|
the DMA operation is going to read or write to system memory.
|
|
@param ChannelNumber - The slave channel number to use for this DMA operation.
|
|
If Operation and ChannelAttributes shows that this device
|
|
performs bus mastering DMA, then this field is ignored.
|
|
The legal range for this field is 0..7.
|
|
@param ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
|
|
@param HostAddress - The system memory address to map to the device.
|
|
@param NumberOfBytes - On input the number of bytes to map. On output the number
|
|
of bytes that were mapped.
|
|
@param DeviceAddress - The resulting map address for the bus master device to use
|
|
to access the hosts HostAddress.
|
|
@param Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
|
|
|
|
@retval EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
|
|
@retval EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
|
|
@retval EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
|
|
@retval EFI_DEVICE_ERROR - The system hardware could not map the requested address.
|
|
@retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
IsaIoMap_OnlySupportSlaveReadWrite (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
|
|
IN UINT8 ChannelNumber OPTIONAL,
|
|
IN UINT32 ChannelAttributes,
|
|
IN VOID *HostAddress,
|
|
IN OUT UINTN *NumberOfBytes,
|
|
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
|
|
OUT VOID **Mapping
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_PHYSICAL_ADDRESS PhysicalAddress;
|
|
ISA_MAP_INFO *IsaMapInfo;
|
|
UINT8 DmaMode;
|
|
UINTN MaxNumberOfBytes;
|
|
UINT32 BaseAddress;
|
|
UINT16 Count;
|
|
|
|
UINT8 DmaMask;
|
|
UINT8 DmaClear;
|
|
UINT8 DmaChannelMode;
|
|
|
|
if ((NULL == This) ||
|
|
(NULL == HostAddress) ||
|
|
(NULL == NumberOfBytes) ||
|
|
(NULL == DeviceAddress) ||
|
|
(NULL == Mapping)
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
|
|
//
|
|
// Initialize the return values to their defaults
|
|
//
|
|
*Mapping = NULL;
|
|
|
|
//
|
|
// Make sure the Operation parameter is valid.
|
|
// Light IsaIo only supports two operations.
|
|
//
|
|
if (!(Operation == EfiIsaIoOperationSlaveRead ||
|
|
Operation == EfiIsaIoOperationSlaveWrite)) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (ChannelNumber >= 4) {
|
|
//
|
|
// The Light IsaIo doesn't support channelNumber larger than 4.
|
|
//
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// Map the HostAddress to a DeviceAddress.
|
|
//
|
|
PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
|
|
if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {
|
|
//
|
|
// Common Buffer operations can not be remapped. If the common buffer
|
|
// is above 16MB, then it is not possible to generate a mapping, so return
|
|
// an error.
|
|
//
|
|
if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
//
|
|
// Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()
|
|
// is called later.
|
|
//
|
|
IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));
|
|
if (IsaMapInfo == NULL) {
|
|
*NumberOfBytes = 0;
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
//
|
|
// Return a pointer to the MAP_INFO structure in Mapping
|
|
//
|
|
*Mapping = IsaMapInfo;
|
|
|
|
//
|
|
// Initialize the MAP_INFO structure
|
|
//
|
|
IsaMapInfo->Operation = Operation;
|
|
IsaMapInfo->NumberOfBytes = *NumberOfBytes;
|
|
IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);
|
|
IsaMapInfo->HostAddress = PhysicalAddress;
|
|
IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;
|
|
|
|
//
|
|
// Allocate a buffer below 16MB to map the transfer to.
|
|
//
|
|
Status = gBS->AllocatePages (
|
|
AllocateMaxAddress,
|
|
EfiBootServicesData,
|
|
IsaMapInfo->NumberOfPages,
|
|
&IsaMapInfo->MappedHostAddress
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->FreePool (IsaMapInfo);
|
|
*NumberOfBytes = 0;
|
|
*Mapping = NULL;
|
|
return Status;
|
|
}
|
|
//
|
|
// If this is a read operation from the DMA agents's point of view,
|
|
// then copy the contents of the real buffer into the mapped buffer
|
|
// so the DMA agent can read the contents of the real buffer.
|
|
//
|
|
if (Operation == EfiIsaIoOperationSlaveRead) {
|
|
CopyMem (
|
|
(VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
|
|
(VOID *) (UINTN) IsaMapInfo->HostAddress,
|
|
IsaMapInfo->NumberOfBytes
|
|
);
|
|
}
|
|
//
|
|
// The DeviceAddress is the address of the maped buffer below 16 MB
|
|
//
|
|
*DeviceAddress = IsaMapInfo->MappedHostAddress;
|
|
} else {
|
|
//
|
|
// The transfer is below 16 MB, so the DeviceAddress is simply the
|
|
// HostAddress
|
|
//
|
|
*DeviceAddress = PhysicalAddress;
|
|
}
|
|
|
|
//
|
|
// Figure out what to program into the DMA Channel Mode Register
|
|
//
|
|
DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));
|
|
if (Operation == EfiIsaIoOperationSlaveRead) {
|
|
DmaMode |= V_8237_DMA_CHMODE_MEM2IO;
|
|
} else {
|
|
DmaMode |= V_8237_DMA_CHMODE_IO2MEM;
|
|
}
|
|
//
|
|
// We only support EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE in simplified IsaIo
|
|
//
|
|
DmaMode |= V_8237_DMA_CHMODE_SINGLE;
|
|
|
|
//
|
|
// A Slave DMA transfer can not cross a 64K boundary.
|
|
// Compute *NumberOfBytes based on this restriction.
|
|
//
|
|
MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);
|
|
if (*NumberOfBytes > MaxNumberOfBytes) {
|
|
*NumberOfBytes = MaxNumberOfBytes;
|
|
}
|
|
//
|
|
// Compute the values to program into the BaseAddress and Count registers
|
|
// of the Slave DMA controller
|
|
//
|
|
BaseAddress = (UINT32) (*DeviceAddress);
|
|
Count = (UINT16) (*NumberOfBytes - 1);
|
|
//
|
|
// Program the DMA Write Single Mask Register for ChannelNumber
|
|
// Clear the DMA Byte Pointer Register
|
|
//
|
|
DmaMask = R_8237_DMA_WRSMSK_CH0_3;
|
|
DmaClear = R_8237_DMA_CBPR_CH0_3;
|
|
DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaMask,
|
|
(UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaClear,
|
|
(UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, DmaChannelMode, DmaMode);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WriteDmaPort (
|
|
This,
|
|
DmaRegisters[ChannelNumber].Address,
|
|
DmaRegisters[ChannelNumber].Page,
|
|
DmaRegisters[ChannelNumber].Count,
|
|
BaseAddress,
|
|
Count
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaMask,
|
|
(UINT8) (ChannelNumber & 0x03)
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Maps a memory region for DMA. This implementation implement the
|
|
the full mapping support.
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Operation - Indicates the type of DMA (slave or bus master), and if
|
|
the DMA operation is going to read or write to system memory.
|
|
@param ChannelNumber - The slave channel number to use for this DMA operation.
|
|
If Operation and ChannelAttributes shows that this device
|
|
performs bus mastering DMA, then this field is ignored.
|
|
The legal range for this field is 0..7.
|
|
@param ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
|
|
@param HostAddress - The system memory address to map to the device.
|
|
@param NumberOfBytes - On input the number of bytes to map. On output the number
|
|
of bytes that were mapped.
|
|
@param DeviceAddress - The resulting map address for the bus master device to use
|
|
- to access the hosts HostAddress.
|
|
@param Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
|
|
|
|
@retval EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
|
|
@retval EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
|
|
@retval EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
|
|
@retval EFI_DEVICE_ERROR - The system hardware could not map the requested address.
|
|
@retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
IsaIoMap_FullSupport (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
|
|
IN UINT8 ChannelNumber OPTIONAL,
|
|
IN UINT32 ChannelAttributes,
|
|
IN VOID *HostAddress,
|
|
IN OUT UINTN *NumberOfBytes,
|
|
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
|
|
OUT VOID **Mapping
|
|
)
|
|
|
|
{
|
|
EFI_STATUS Status;
|
|
BOOLEAN Master;
|
|
BOOLEAN Read;
|
|
EFI_PHYSICAL_ADDRESS PhysicalAddress;
|
|
ISA_MAP_INFO *IsaMapInfo;
|
|
UINT8 DmaMode;
|
|
UINTN MaxNumberOfBytes;
|
|
UINT32 BaseAddress;
|
|
UINT16 Count;
|
|
|
|
UINT8 DmaMask;
|
|
UINT8 DmaClear;
|
|
UINT8 DmaChannelMode;
|
|
|
|
if ((NULL == This) ||
|
|
(NULL == HostAddress) ||
|
|
(NULL == NumberOfBytes) ||
|
|
(NULL == DeviceAddress) ||
|
|
(NULL == Mapping)
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
|
|
//
|
|
// Initialize the return values to their defaults
|
|
//
|
|
*Mapping = NULL;
|
|
|
|
//
|
|
// Make sure the Operation parameter is valid
|
|
//
|
|
if (Operation < 0 || Operation >= EfiIsaIoOperationMaximum) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (ChannelNumber >= 8) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
//
|
|
// See if this is a Slave DMA Operation
|
|
//
|
|
Master = TRUE;
|
|
Read = FALSE;
|
|
if (Operation == EfiIsaIoOperationSlaveRead) {
|
|
Operation = EfiIsaIoOperationBusMasterRead;
|
|
Master = FALSE;
|
|
Read = TRUE;
|
|
}
|
|
|
|
if (Operation == EfiIsaIoOperationSlaveWrite) {
|
|
Operation = EfiIsaIoOperationBusMasterWrite;
|
|
Master = FALSE;
|
|
Read = FALSE;
|
|
}
|
|
|
|
if (!Master) {
|
|
//
|
|
// Make sure that ChannelNumber is a valid channel number
|
|
// Channel 4 is used to cascade, so it is illegal.
|
|
//
|
|
if (ChannelNumber == 4 || ChannelNumber > 7) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// This implementation only support COMPATIBLE DMA Transfers
|
|
//
|
|
if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE)) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (ChannelAttributes &
|
|
(
|
|
EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A |
|
|
EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B |
|
|
EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C
|
|
)
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (ChannelNumber < 4) {
|
|
//
|
|
// If this is Channel 0..3, then the width must be 8 bit
|
|
//
|
|
if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||
|
|
(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16)
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
} else {
|
|
//
|
|
// If this is Channel 4..7, then the width must be 16 bit
|
|
//
|
|
if ((ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||
|
|
(!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16))
|
|
) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
//
|
|
// Either Demand Mode or Single Mode must be selected, but not both
|
|
//
|
|
if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {
|
|
if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
} else {
|
|
if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE)) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
}
|
|
}
|
|
//
|
|
// Map the HostAddress to a DeviceAddress.
|
|
//
|
|
PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
|
|
if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {
|
|
//
|
|
// Common Buffer operations can not be remapped. If the common buffer
|
|
// is above 16MB, then it is not possible to generate a mapping, so return
|
|
// an error.
|
|
//
|
|
if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
//
|
|
// Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()
|
|
// is called later.
|
|
//
|
|
IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));
|
|
if (IsaMapInfo == NULL) {
|
|
*NumberOfBytes = 0;
|
|
return EFI_OUT_OF_RESOURCES;
|
|
}
|
|
//
|
|
// Return a pointer to the MAP_INFO structure in Mapping
|
|
//
|
|
*Mapping = IsaMapInfo;
|
|
|
|
//
|
|
// Initialize the MAP_INFO structure
|
|
//
|
|
IsaMapInfo->Operation = Operation;
|
|
IsaMapInfo->NumberOfBytes = *NumberOfBytes;
|
|
IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);
|
|
IsaMapInfo->HostAddress = PhysicalAddress;
|
|
IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;
|
|
|
|
//
|
|
// Allocate a buffer below 16MB to map the transfer to.
|
|
//
|
|
Status = gBS->AllocatePages (
|
|
AllocateMaxAddress,
|
|
EfiBootServicesData,
|
|
IsaMapInfo->NumberOfPages,
|
|
&IsaMapInfo->MappedHostAddress
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
gBS->FreePool (IsaMapInfo);
|
|
*NumberOfBytes = 0;
|
|
*Mapping = NULL;
|
|
return Status;
|
|
}
|
|
//
|
|
// If this is a read operation from the DMA agents's point of view,
|
|
// then copy the contents of the real buffer into the mapped buffer
|
|
// so the DMA agent can read the contents of the real buffer.
|
|
//
|
|
if (Operation == EfiIsaIoOperationBusMasterRead) {
|
|
CopyMem (
|
|
(VOID *) (UINTN) IsaMapInfo->MappedHostAddress,
|
|
(VOID *) (UINTN) IsaMapInfo->HostAddress,
|
|
IsaMapInfo->NumberOfBytes
|
|
);
|
|
}
|
|
//
|
|
// The DeviceAddress is the address of the maped buffer below 16 MB
|
|
//
|
|
*DeviceAddress = IsaMapInfo->MappedHostAddress;
|
|
} else {
|
|
//
|
|
// The transfer is below 16 MB, so the DeviceAddress is simply the
|
|
// HostAddress
|
|
//
|
|
*DeviceAddress = PhysicalAddress;
|
|
}
|
|
//
|
|
// If this is a Bus Master operation then return
|
|
//
|
|
if (Master) {
|
|
return EFI_SUCCESS;
|
|
}
|
|
//
|
|
// Figure out what to program into the DMA Channel Mode Register
|
|
//
|
|
DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));
|
|
if (Read) {
|
|
DmaMode |= V_8237_DMA_CHMODE_MEM2IO;
|
|
} else {
|
|
DmaMode |= V_8237_DMA_CHMODE_IO2MEM;
|
|
}
|
|
|
|
if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE) {
|
|
DmaMode |= B_8237_DMA_CHMODE_AE;
|
|
}
|
|
|
|
if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {
|
|
DmaMode |= V_8237_DMA_CHMODE_DEMAND;
|
|
}
|
|
|
|
if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {
|
|
DmaMode |= V_8237_DMA_CHMODE_SINGLE;
|
|
}
|
|
//
|
|
// A Slave DMA transfer can not cross a 64K boundary.
|
|
// Compute *NumberOfBytes based on this restriction.
|
|
//
|
|
MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);
|
|
if (*NumberOfBytes > MaxNumberOfBytes) {
|
|
*NumberOfBytes = MaxNumberOfBytes;
|
|
}
|
|
//
|
|
// Compute the values to program into the BaseAddress and Count registers
|
|
// of the Slave DMA controller
|
|
//
|
|
if (ChannelNumber < 4) {
|
|
BaseAddress = (UINT32) (*DeviceAddress);
|
|
Count = (UINT16) (*NumberOfBytes - 1);
|
|
} else {
|
|
BaseAddress = (UINT32) (((UINT32) (*DeviceAddress) & 0xff0000) | (((UINT32) (*DeviceAddress) & 0xffff) >> 1));
|
|
Count = (UINT16) ((*NumberOfBytes - 1) >> 1);
|
|
}
|
|
//
|
|
// Program the DMA Write Single Mask Register for ChannelNumber
|
|
// Clear the DMA Byte Pointer Register
|
|
//
|
|
if (ChannelNumber < 4) {
|
|
DmaMask = R_8237_DMA_WRSMSK_CH0_3;
|
|
DmaClear = R_8237_DMA_CBPR_CH0_3;
|
|
DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;
|
|
} else {
|
|
DmaMask = R_8237_DMA_WRSMSK_CH4_7;
|
|
DmaClear = R_8237_DMA_CBPR_CH4_7;
|
|
DmaChannelMode = R_8237_DMA_CHMODE_CH4_7;
|
|
}
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaMask,
|
|
(UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaClear,
|
|
(UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (This, DmaChannelMode, DmaMode);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WriteDmaPort (
|
|
This,
|
|
DmaRegisters[ChannelNumber].Address,
|
|
DmaRegisters[ChannelNumber].Page,
|
|
DmaRegisters[ChannelNumber].Count,
|
|
BaseAddress,
|
|
Count
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
Status = WritePort (
|
|
This,
|
|
DmaMask,
|
|
(UINT8) (ChannelNumber & 0x03)
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
return Status;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
/**
|
|
Maps a memory region for DMA
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Operation - Indicates the type of DMA (slave or bus master), and if
|
|
the DMA operation is going to read or write to system memory.
|
|
@param ChannelNumber - The slave channel number to use for this DMA operation.
|
|
If Operation and ChannelAttributes shows that this device
|
|
performs bus mastering DMA, then this field is ignored.
|
|
The legal range for this field is 0..7.
|
|
@param ChannelAttributes - The attributes of the DMA channel to use for this DMA operation
|
|
@param HostAddress - The system memory address to map to the device.
|
|
@param NumberOfBytes - On input the number of bytes to map. On output the number
|
|
of bytes that were mapped.
|
|
@param DeviceAddress - The resulting map address for the bus master device to use
|
|
- to access the hosts HostAddress.
|
|
@param Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().
|
|
|
|
|
|
@retval EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.
|
|
@retval EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.
|
|
@retval EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.
|
|
@retval EFI_DEVICE_ERROR - The system hardware could not map the requested address.
|
|
@retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoMap (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,
|
|
IN UINT8 ChannelNumber OPTIONAL,
|
|
IN UINT32 ChannelAttributes,
|
|
IN VOID *HostAddress,
|
|
IN OUT UINTN *NumberOfBytes,
|
|
OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,
|
|
OUT VOID **Mapping
|
|
)
|
|
|
|
{
|
|
//
|
|
// Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportDma)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
//
|
|
// Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
//
|
|
// So we just return EFI_UNSUPPORTED for these functions.
|
|
//
|
|
if (FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
|
|
return IsaIoMap_OnlySupportSlaveReadWrite (
|
|
This,
|
|
Operation,
|
|
ChannelNumber,
|
|
ChannelAttributes,
|
|
HostAddress,
|
|
NumberOfBytes,
|
|
DeviceAddress,
|
|
Mapping
|
|
);
|
|
|
|
} else {
|
|
return IsaIoMap_FullSupport (
|
|
This,
|
|
Operation,
|
|
ChannelNumber,
|
|
ChannelAttributes,
|
|
HostAddress,
|
|
NumberOfBytes,
|
|
DeviceAddress,
|
|
Mapping
|
|
);
|
|
}
|
|
}
|
|
|
|
/**
|
|
Allocates a common buffer for DMA
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Type - The type allocation to perform.
|
|
@param MemoryType - The type of memory to allocate.
|
|
@param Pages - The number of pages to allocate.
|
|
@param HostAddress - A pointer to store the base address of the allocated range.
|
|
@param Attributes - The requested bit mask of attributes for the allocated range.
|
|
|
|
@retval EFI_SUCCESS - The requested memory pages were allocated.
|
|
@retval EFI_INVALID_PARAMETER - Type is invalid or MemoryType is invalid or HostAddress is NULL
|
|
@retval EFI_UNSUPPORTED - Attributes is unsupported or the memory range specified
|
|
by HostAddress, Pages, and Type is not available for common buffer use.
|
|
@retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoAllocateBuffer (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN EFI_ALLOCATE_TYPE Type,
|
|
IN EFI_MEMORY_TYPE MemoryType,
|
|
IN UINTN Pages,
|
|
OUT VOID **HostAddress,
|
|
IN UINT64 Attributes
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_PHYSICAL_ADDRESS PhysicalAddress;
|
|
|
|
//
|
|
// Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
// Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
if (HostAddress == NULL) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (Type < AllocateAnyPages || Type >= MaxAllocateType) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
//
|
|
// The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData
|
|
//
|
|
if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {
|
|
return EFI_INVALID_PARAMETER;
|
|
}
|
|
|
|
if (Attributes &~(EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE | EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) (ISA_MAX_MEMORY_ADDRESS - 1);
|
|
if (Type == AllocateAddress) {
|
|
if ((UINTN) (*HostAddress) >= ISA_MAX_MEMORY_ADDRESS) {
|
|
return EFI_UNSUPPORTED;
|
|
} else {
|
|
PhysicalAddress = (UINTN) (*HostAddress);
|
|
}
|
|
}
|
|
|
|
if (Type == AllocateAnyPages) {
|
|
Type = AllocateMaxAddress;
|
|
}
|
|
|
|
Status = gBS->AllocatePages (Type, MemoryType, Pages, &PhysicalAddress);
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
return Status;
|
|
}
|
|
|
|
*HostAddress = (VOID *) (UINTN) PhysicalAddress;
|
|
return Status;
|
|
}
|
|
|
|
/**
|
|
|
|
Frees a common buffer
|
|
|
|
@param This - A pointer to the EFI_ISA_IO_PROTOCOL instance.
|
|
@param Pages - The number of pages to free.
|
|
@param HostAddress - The base address of the allocated range.
|
|
|
|
|
|
@retval EFI_SUCCESS - The requested memory pages were freed.
|
|
@retval EFI_INVALID_PARAMETER - The memory was not allocated with EFI_ISA_IO.AllocateBufer().
|
|
|
|
**/
|
|
|
|
EFI_STATUS
|
|
EFIAPI
|
|
IsaIoFreeBuffer (
|
|
IN EFI_ISA_IO_PROTOCOL *This,
|
|
IN UINTN Pages,
|
|
IN VOID *HostAddress
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
EFI_PHYSICAL_ADDRESS PhysicalAddress;
|
|
|
|
//
|
|
// Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for
|
|
// ISA Bus Master.
|
|
// Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.
|
|
//
|
|
if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {
|
|
return EFI_UNSUPPORTED;
|
|
}
|
|
|
|
PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;
|
|
Status = gBS->FreePages (
|
|
PhysicalAddress,
|
|
Pages
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);
|
|
}
|
|
|
|
return Status;
|
|
}
|
|
|