mirror of https://github.com/acidanthera/audk.git
UefiCpuPkg: CpuIo2Smm: Abstract SMM specific functions into separate file
This change abstracts CpuIo2Smm driver entrypoint into separate file and moves functions/definitions that are not substantially specific to Traditional MM (SMM) into CpuIo2Mm.* in order to set ways for Standalone MM support in the future. Cc: Eric Dong <eric.dong@intel.com> Cc: Ray Ni <ray.ni@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Rahul Kumar <rahul1.kumar@intel.com> Signed-off-by: Kun Qin <kun.q@outlook.com> Reviewed-by: Ray Ni <ray.ni@intel.com>
This commit is contained in:
Kun Qin
parent
e414a3e936
commit
1ea21af13d
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@ -0,0 +1,402 @@
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/** @file
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Produces the SMM CPU I/O Protocol.
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include "CpuIo2Mm.h"
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//
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// Handle for the SMM CPU I/O Protocol
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//
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EFI_HANDLE mHandle = NULL;
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//
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// SMM CPU I/O Protocol instance
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//
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EFI_SMM_CPU_IO2_PROTOCOL mSmmCpuIo2 = {
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{
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CpuMemoryServiceRead,
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CpuMemoryServiceWrite
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},
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{
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CpuIoServiceRead,
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CpuIoServiceWrite
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}
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};
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//
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// Lookup table for increment values based on transfer widths
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//
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UINT8 mStride[] = {
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1, // SMM_IO_UINT8
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2, // SMM_IO_UINT16
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4, // SMM_IO_UINT32
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8 // SMM_IO_UINT64
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};
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/**
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Check parameters to a SMM CPU I/O Protocol service request.
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@param[in] MmioOperation TRUE for an MMIO operation, FALSE for I/O Port operation.
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@param[in] Width Signifies the width of the I/O operations.
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@param[in] Address The base address of the I/O operations. The caller is
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responsible for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform.
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@param[in] Buffer For read operations, the destination buffer to store
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the results. For write operations, the source buffer
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from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the device.
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@retval EFI_UNSUPPORTED The Address is not valid for this system.
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@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
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**/
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EFI_STATUS
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CpuIoCheckParameter (
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IN BOOLEAN MmioOperation,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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UINT64 MaxCount;
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UINT64 Limit;
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//
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// Check to see if Buffer is NULL
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//
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if (Buffer == NULL) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check to see if Width is in the valid range
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//
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if ((UINT32)Width > SMM_IO_UINT64) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check to see if Width is in the valid range for I/O Port operations
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//
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if (!MmioOperation && (Width == SMM_IO_UINT64)) {
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return EFI_INVALID_PARAMETER;
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}
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//
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// Check to see if any address associated with this transfer exceeds the maximum
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// allowed address. The maximum address implied by the parameters passed in is
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// Address + Size * Count. If the following condition is met, then the transfer
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// is not supported.
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//
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// Address + Size * Count > (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS) + 1
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//
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// Since MAX_ADDRESS can be the maximum integer value supported by the CPU and Count
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// can also be the maximum integer value supported by the CPU, this range
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// check must be adjusted to avoid all overflow conditions.
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//
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// The following form of the range check is equivalent but assumes that
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// MAX_ADDRESS and MAX_IO_PORT_ADDRESS are of the form (2^n - 1).
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//
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Limit = (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS);
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if (Count == 0) {
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if (Address > Limit) {
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return EFI_UNSUPPORTED;
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}
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} else {
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MaxCount = RShiftU64 (Limit, Width);
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if (MaxCount < (Count - 1)) {
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return EFI_UNSUPPORTED;
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}
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if (Address > LShiftU64 (MaxCount - Count + 1, Width)) {
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return EFI_UNSUPPORTED;
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}
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}
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//
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// Check to see if Address is aligned
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//
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if ((Address & ((UINT64)mStride[Width] - 1)) != 0) {
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return EFI_UNSUPPORTED;
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}
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return EFI_SUCCESS;
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}
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/**
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Reads memory-mapped registers.
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The I/O operations are carried out exactly as requested. The caller is
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responsible for any alignment and I/O width issues that the bus, device,
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platform, or type of I/O might require.
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@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operations.
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@param[in] Address The base address of the I/O operations. The caller is
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responsible for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform.
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@param[out] Buffer For read operations, the destination buffer to store
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the results. For write operations, the source buffer
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from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the device.
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@retval EFI_UNSUPPORTED The Address is not valid for this system.
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@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
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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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**/
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EFI_STATUS
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EFIAPI
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CpuMemoryServiceRead (
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IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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OUT VOID *Buffer
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)
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{
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EFI_STATUS Status;
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UINT8 Stride;
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UINT8 *Uint8Buffer;
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Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
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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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// Select loop based on the width of the transfer
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//
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Stride = mStride[Width];
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for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
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if (Width == SMM_IO_UINT8) {
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*Uint8Buffer = MmioRead8 ((UINTN)Address);
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} else if (Width == SMM_IO_UINT16) {
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*((UINT16 *)Uint8Buffer) = MmioRead16 ((UINTN)Address);
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} else if (Width == SMM_IO_UINT32) {
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*((UINT32 *)Uint8Buffer) = MmioRead32 ((UINTN)Address);
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} else if (Width == SMM_IO_UINT64) {
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*((UINT64 *)Uint8Buffer) = MmioRead64 ((UINTN)Address);
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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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Writes memory-mapped registers.
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The I/O operations are carried out exactly as requested. The caller is
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responsible for any alignment and I/O width issues that the bus, device,
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platform, or type of I/O might require.
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@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operations.
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@param[in] Address The base address of the I/O operations. The caller is
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responsible for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform.
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@param[in] Buffer For read operations, the destination buffer to store
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the results. For write operations, the source buffer
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from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the device.
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@retval EFI_UNSUPPORTED The Address is not valid for this system.
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@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
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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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**/
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EFI_STATUS
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EFIAPI
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CpuMemoryServiceWrite (
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IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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EFI_STATUS Status;
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UINT8 Stride;
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UINT8 *Uint8Buffer;
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Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
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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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// Select loop based on the width of the transfer
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//
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Stride = mStride[Width];
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for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
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if (Width == SMM_IO_UINT8) {
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MmioWrite8 ((UINTN)Address, *Uint8Buffer);
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} else if (Width == SMM_IO_UINT16) {
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MmioWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
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} else if (Width == SMM_IO_UINT32) {
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MmioWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
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} else if (Width == SMM_IO_UINT64) {
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MmioWrite64 ((UINTN)Address, *((UINT64 *)Uint8Buffer));
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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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Reads I/O registers.
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The I/O operations are carried out exactly as requested. The caller is
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responsible for any alignment and I/O width issues that the bus, device,
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platform, or type of I/O might require.
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@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operations.
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@param[in] Address The base address of the I/O operations. The caller is
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responsible for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform.
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@param[out] Buffer For read operations, the destination buffer to store
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the results. For write operations, the source buffer
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from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the device.
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@retval EFI_UNSUPPORTED The Address is not valid for this system.
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@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
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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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**/
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EFI_STATUS
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EFIAPI
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CpuIoServiceRead (
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IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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OUT VOID *Buffer
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)
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{
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EFI_STATUS Status;
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UINT8 Stride;
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UINT8 *Uint8Buffer;
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Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
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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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// Select loop based on the width of the transfer
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//
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Stride = mStride[Width];
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for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
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if (Width == SMM_IO_UINT8) {
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*Uint8Buffer = IoRead8 ((UINTN)Address);
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} else if (Width == SMM_IO_UINT16) {
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*((UINT16 *)Uint8Buffer) = IoRead16 ((UINTN)Address);
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} else if (Width == SMM_IO_UINT32) {
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*((UINT32 *)Uint8Buffer) = IoRead32 ((UINTN)Address);
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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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Write I/O registers.
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The I/O operations are carried out exactly as requested. The caller is
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responsible for any alignment and I/O width issues that the bus, device,
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platform, or type of I/O might require.
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@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
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@param[in] Width Signifies the width of the I/O operations.
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@param[in] Address The base address of the I/O operations. The caller is
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responsible for aligning the Address if required.
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@param[in] Count The number of I/O operations to perform.
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@param[in] Buffer For read operations, the destination buffer to store
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the results. For write operations, the source buffer
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from which to write data.
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@retval EFI_SUCCESS The data was read from or written to the device.
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@retval EFI_UNSUPPORTED The Address is not valid for this system.
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@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
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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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**/
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EFI_STATUS
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EFIAPI
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CpuIoServiceWrite (
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IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
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IN EFI_SMM_IO_WIDTH Width,
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IN UINT64 Address,
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IN UINTN Count,
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IN VOID *Buffer
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)
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{
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EFI_STATUS Status;
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UINT8 Stride;
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UINT8 *Uint8Buffer;
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//
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// Make sure the parameters are valid
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//
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Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
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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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// Select loop based on the width of the transfer
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//
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Stride = mStride[Width];
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for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
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if (Width == SMM_IO_UINT8) {
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IoWrite8 ((UINTN)Address, *Uint8Buffer);
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} else if (Width == SMM_IO_UINT16) {
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IoWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
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} else if (Width == SMM_IO_UINT32) {
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IoWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
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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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The module Entry Point SmmCpuIoProtocol driver
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval Other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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CommonCpuIo2Initialize (
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VOID
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)
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{
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EFI_STATUS Status;
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//
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// Copy the SMM CPU I/O Protocol instance into the System Management System Table
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//
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CopyMem (&gMmst->MmIo, &mSmmCpuIo2, sizeof (mSmmCpuIo2));
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//
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// Install the SMM CPU I/O Protocol into the MM protocol database
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//
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Status = gMmst->MmInstallProtocolInterface (
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&mHandle,
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&gEfiSmmCpuIo2ProtocolGuid,
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EFI_NATIVE_INTERFACE,
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&mSmmCpuIo2
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);
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ASSERT_EFI_ERROR (Status);
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return Status;
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}
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@ -153,4 +153,16 @@ CpuIoServiceWrite (
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IN VOID *Buffer
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);
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/**
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The module Entry Point SmmCpuIoProtocol driver
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@retval EFI_SUCCESS The entry point is executed successfully.
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@retval Other Some error occurs when executing this entry point.
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**/
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EFI_STATUS
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CommonCpuIo2Initialize (
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VOID
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);
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#endif
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@ -2,374 +2,17 @@
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Produces the SMM CPU I/O Protocol.
|
||||
|
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Copyright (c) 2009 - 2018, Intel Corporation. All rights reserved.<BR>
|
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Copyright (c) Microsoft Corporation.
|
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SPDX-License-Identifier: BSD-2-Clause-Patent
|
||||
|
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**/
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#include "CpuIo2Smm.h"
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#include <PiSmm.h>
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//
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// Handle for the SMM CPU I/O Protocol
|
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//
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EFI_HANDLE mHandle = NULL;
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|
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//
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// SMM CPU I/O Protocol instance
|
||||
//
|
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EFI_SMM_CPU_IO2_PROTOCOL mSmmCpuIo2 = {
|
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{
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CpuMemoryServiceRead,
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CpuMemoryServiceWrite
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},
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{
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CpuIoServiceRead,
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CpuIoServiceWrite
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}
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};
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|
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//
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// Lookup table for increment values based on transfer widths
|
||||
//
|
||||
UINT8 mStride[] = {
|
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1, // SMM_IO_UINT8
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2, // SMM_IO_UINT16
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4, // SMM_IO_UINT32
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8 // SMM_IO_UINT64
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};
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#include "CpuIo2Mm.h"
|
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|
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/**
|
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Check parameters to a SMM CPU I/O Protocol service request.
|
||||
|
||||
@param[in] MmioOperation TRUE for an MMIO operation, FALSE for I/O Port operation.
|
||||
@param[in] Width Signifies the width of the I/O operations.
|
||||
@param[in] Address The base address of the I/O operations. The caller is
|
||||
responsible for aligning the Address if required.
|
||||
@param[in] Count The number of I/O operations to perform.
|
||||
@param[in] Buffer For read operations, the destination buffer to store
|
||||
the results. For write operations, the source buffer
|
||||
from which to write data.
|
||||
|
||||
@retval EFI_SUCCESS The data was read from or written to the device.
|
||||
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||||
@retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.
|
||||
|
||||
**/
|
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EFI_STATUS
|
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CpuIoCheckParameter (
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IN BOOLEAN MmioOperation,
|
||||
IN EFI_SMM_IO_WIDTH Width,
|
||||
IN UINT64 Address,
|
||||
IN UINTN Count,
|
||||
IN VOID *Buffer
|
||||
)
|
||||
{
|
||||
UINT64 MaxCount;
|
||||
UINT64 Limit;
|
||||
|
||||
//
|
||||
// Check to see if Buffer is NULL
|
||||
//
|
||||
if (Buffer == NULL) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//
|
||||
// Check to see if Width is in the valid range
|
||||
//
|
||||
if ((UINT32)Width > SMM_IO_UINT64) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//
|
||||
// Check to see if Width is in the valid range for I/O Port operations
|
||||
//
|
||||
if (!MmioOperation && (Width == SMM_IO_UINT64)) {
|
||||
return EFI_INVALID_PARAMETER;
|
||||
}
|
||||
|
||||
//
|
||||
// Check to see if any address associated with this transfer exceeds the maximum
|
||||
// allowed address. The maximum address implied by the parameters passed in is
|
||||
// Address + Size * Count. If the following condition is met, then the transfer
|
||||
// is not supported.
|
||||
//
|
||||
// Address + Size * Count > (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS) + 1
|
||||
//
|
||||
// Since MAX_ADDRESS can be the maximum integer value supported by the CPU and Count
|
||||
// can also be the maximum integer value supported by the CPU, this range
|
||||
// check must be adjusted to avoid all overflow conditions.
|
||||
//
|
||||
// The following form of the range check is equivalent but assumes that
|
||||
// MAX_ADDRESS and MAX_IO_PORT_ADDRESS are of the form (2^n - 1).
|
||||
//
|
||||
Limit = (MmioOperation ? MAX_ADDRESS : MAX_IO_PORT_ADDRESS);
|
||||
if (Count == 0) {
|
||||
if (Address > Limit) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
} else {
|
||||
MaxCount = RShiftU64 (Limit, Width);
|
||||
if (MaxCount < (Count - 1)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
if (Address > LShiftU64 (MaxCount - Count + 1, Width)) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
}
|
||||
|
||||
//
|
||||
// Check to see if Address is aligned
|
||||
//
|
||||
if ((Address & ((UINT64)mStride[Width] - 1)) != 0) {
|
||||
return EFI_UNSUPPORTED;
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Reads memory-mapped registers.
|
||||
|
||||
The I/O operations are carried out exactly as requested. The caller is
|
||||
responsible for any alignment and I/O width issues that the bus, device,
|
||||
platform, or type of I/O might require.
|
||||
|
||||
@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
|
||||
@param[in] Width Signifies the width of the I/O operations.
|
||||
@param[in] Address The base address of the I/O operations. The caller is
|
||||
responsible for aligning the Address if required.
|
||||
@param[in] Count The number of I/O operations to perform.
|
||||
@param[out] Buffer For read operations, the destination buffer to store
|
||||
the results. For write operations, the source buffer
|
||||
from which to write data.
|
||||
|
||||
@retval EFI_SUCCESS The data was read from or written to the device.
|
||||
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||||
@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
|
||||
CpuMemoryServiceRead (
|
||||
IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
|
||||
IN EFI_SMM_IO_WIDTH Width,
|
||||
IN UINT64 Address,
|
||||
IN UINTN Count,
|
||||
OUT VOID *Buffer
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINT8 Stride;
|
||||
UINT8 *Uint8Buffer;
|
||||
|
||||
Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// Select loop based on the width of the transfer
|
||||
//
|
||||
Stride = mStride[Width];
|
||||
for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
|
||||
if (Width == SMM_IO_UINT8) {
|
||||
*Uint8Buffer = MmioRead8 ((UINTN)Address);
|
||||
} else if (Width == SMM_IO_UINT16) {
|
||||
*((UINT16 *)Uint8Buffer) = MmioRead16 ((UINTN)Address);
|
||||
} else if (Width == SMM_IO_UINT32) {
|
||||
*((UINT32 *)Uint8Buffer) = MmioRead32 ((UINTN)Address);
|
||||
} else if (Width == SMM_IO_UINT64) {
|
||||
*((UINT64 *)Uint8Buffer) = MmioRead64 ((UINTN)Address);
|
||||
}
|
||||
}
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Writes memory-mapped registers.
|
||||
|
||||
The I/O operations are carried out exactly as requested. The caller is
|
||||
responsible for any alignment and I/O width issues that the bus, device,
|
||||
platform, or type of I/O might require.
|
||||
|
||||
@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
|
||||
@param[in] Width Signifies the width of the I/O operations.
|
||||
@param[in] Address The base address of the I/O operations. The caller is
|
||||
responsible for aligning the Address if required.
|
||||
@param[in] Count The number of I/O operations to perform.
|
||||
@param[in] Buffer For read operations, the destination buffer to store
|
||||
the results. For write operations, the source buffer
|
||||
from which to write data.
|
||||
|
||||
@retval EFI_SUCCESS The data was read from or written to the device.
|
||||
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||||
@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
|
||||
CpuMemoryServiceWrite (
|
||||
IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
|
||||
IN EFI_SMM_IO_WIDTH Width,
|
||||
IN UINT64 Address,
|
||||
IN UINTN Count,
|
||||
IN VOID *Buffer
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINT8 Stride;
|
||||
UINT8 *Uint8Buffer;
|
||||
|
||||
Status = CpuIoCheckParameter (TRUE, Width, Address, Count, Buffer);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// Select loop based on the width of the transfer
|
||||
//
|
||||
Stride = mStride[Width];
|
||||
for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
|
||||
if (Width == SMM_IO_UINT8) {
|
||||
MmioWrite8 ((UINTN)Address, *Uint8Buffer);
|
||||
} else if (Width == SMM_IO_UINT16) {
|
||||
MmioWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
|
||||
} else if (Width == SMM_IO_UINT32) {
|
||||
MmioWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
|
||||
} else if (Width == SMM_IO_UINT64) {
|
||||
MmioWrite64 ((UINTN)Address, *((UINT64 *)Uint8Buffer));
|
||||
}
|
||||
}
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Reads I/O registers.
|
||||
|
||||
The I/O operations are carried out exactly as requested. The caller is
|
||||
responsible for any alignment and I/O width issues that the bus, device,
|
||||
platform, or type of I/O might require.
|
||||
|
||||
@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
|
||||
@param[in] Width Signifies the width of the I/O operations.
|
||||
@param[in] Address The base address of the I/O operations. The caller is
|
||||
responsible for aligning the Address if required.
|
||||
@param[in] Count The number of I/O operations to perform.
|
||||
@param[out] Buffer For read operations, the destination buffer to store
|
||||
the results. For write operations, the source buffer
|
||||
from which to write data.
|
||||
|
||||
@retval EFI_SUCCESS The data was read from or written to the device.
|
||||
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||||
@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
|
||||
CpuIoServiceRead (
|
||||
IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
|
||||
IN EFI_SMM_IO_WIDTH Width,
|
||||
IN UINT64 Address,
|
||||
IN UINTN Count,
|
||||
OUT VOID *Buffer
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINT8 Stride;
|
||||
UINT8 *Uint8Buffer;
|
||||
|
||||
Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// Select loop based on the width of the transfer
|
||||
//
|
||||
Stride = mStride[Width];
|
||||
for (Uint8Buffer = Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
|
||||
if (Width == SMM_IO_UINT8) {
|
||||
*Uint8Buffer = IoRead8 ((UINTN)Address);
|
||||
} else if (Width == SMM_IO_UINT16) {
|
||||
*((UINT16 *)Uint8Buffer) = IoRead16 ((UINTN)Address);
|
||||
} else if (Width == SMM_IO_UINT32) {
|
||||
*((UINT32 *)Uint8Buffer) = IoRead32 ((UINTN)Address);
|
||||
}
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
Write I/O registers.
|
||||
|
||||
The I/O operations are carried out exactly as requested. The caller is
|
||||
responsible for any alignment and I/O width issues that the bus, device,
|
||||
platform, or type of I/O might require.
|
||||
|
||||
@param[in] This The EFI_SMM_CPU_IO2_PROTOCOL instance.
|
||||
@param[in] Width Signifies the width of the I/O operations.
|
||||
@param[in] Address The base address of the I/O operations. The caller is
|
||||
responsible for aligning the Address if required.
|
||||
@param[in] Count The number of I/O operations to perform.
|
||||
@param[in] Buffer For read operations, the destination buffer to store
|
||||
the results. For write operations, the source buffer
|
||||
from which to write data.
|
||||
|
||||
@retval EFI_SUCCESS The data was read from or written to the device.
|
||||
@retval EFI_UNSUPPORTED The Address is not valid for this system.
|
||||
@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
|
||||
CpuIoServiceWrite (
|
||||
IN CONST EFI_SMM_CPU_IO2_PROTOCOL *This,
|
||||
IN EFI_SMM_IO_WIDTH Width,
|
||||
IN UINT64 Address,
|
||||
IN UINTN Count,
|
||||
IN VOID *Buffer
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
UINT8 Stride;
|
||||
UINT8 *Uint8Buffer;
|
||||
|
||||
//
|
||||
// Make sure the parameters are valid
|
||||
//
|
||||
Status = CpuIoCheckParameter (FALSE, Width, Address, Count, Buffer);
|
||||
if (EFI_ERROR (Status)) {
|
||||
return Status;
|
||||
}
|
||||
|
||||
//
|
||||
// Select loop based on the width of the transfer
|
||||
//
|
||||
Stride = mStride[Width];
|
||||
for (Uint8Buffer = (UINT8 *)Buffer; Count > 0; Address += Stride, Uint8Buffer += Stride, Count--) {
|
||||
if (Width == SMM_IO_UINT8) {
|
||||
IoWrite8 ((UINTN)Address, *Uint8Buffer);
|
||||
} else if (Width == SMM_IO_UINT16) {
|
||||
IoWrite16 ((UINTN)Address, *((UINT16 *)Uint8Buffer));
|
||||
} else if (Width == SMM_IO_UINT32) {
|
||||
IoWrite32 ((UINTN)Address, *((UINT32 *)Uint8Buffer));
|
||||
}
|
||||
}
|
||||
|
||||
return EFI_SUCCESS;
|
||||
}
|
||||
|
||||
/**
|
||||
The module Entry Point SmmCpuIoProtocol driver
|
||||
The module Entry Point for Traditional MM CpuIoProtocol driver
|
||||
|
||||
@param[in] ImageHandle The firmware allocated handle for the EFI image.
|
||||
@param[in] SystemTable A pointer to the EFI System Table.
|
||||
|
|
@ -385,23 +28,5 @@ SmmCpuIo2Initialize (
|
|||
IN EFI_SYSTEM_TABLE *SystemTable
|
||||
)
|
||||
{
|
||||
EFI_STATUS Status;
|
||||
|
||||
//
|
||||
// Copy the SMM CPU I/O Protocol instance into the System Management System Table
|
||||
//
|
||||
CopyMem (&gMmst->MmIo, &mSmmCpuIo2, sizeof (mSmmCpuIo2));
|
||||
|
||||
//
|
||||
// Install the SMM CPU I/O Protocol into the MM protocol database
|
||||
//
|
||||
Status = gMmst->MmInstallProtocolInterface (
|
||||
&mHandle,
|
||||
&gEfiSmmCpuIo2ProtocolGuid,
|
||||
EFI_NATIVE_INTERFACE,
|
||||
&mSmmCpuIo2
|
||||
);
|
||||
ASSERT_EFI_ERROR (Status);
|
||||
|
||||
return Status;
|
||||
return CommonCpuIo2Initialize ();
|
||||
}
|
||||
|
|
|
|||
|
|
@ -24,7 +24,8 @@
|
|||
|
||||
[Sources]
|
||||
CpuIo2Smm.c
|
||||
CpuIo2Smm.h
|
||||
CpuIo2Mm.c
|
||||
CpuIo2Mm.h
|
||||
|
||||
[Packages]
|
||||
MdePkg/MdePkg.dec
|
||||
|
|
|
|||
Loading…
Reference in New Issue