diff options
| author | klu2 <klu2@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-04-17 05:48:13 +0000 |
|---|---|---|
| committer | klu2 <klu2@6f19259b-4bc3-4df7-8a09-765794883524> | 2008-04-17 05:48:13 +0000 |
| commit | c69dd9dfad3eb97d5e21f520f3ba35d102ec4cfa (patch) | |
| tree | e6065a748931519b3cf11d9811c0beef9c80d58e /DuetPkg/LegacyMetronome/Metronome.c | |
| parent | fcf03596d10de53e45292bd9eb4767a8ddc344ed (diff) | |
| download | edk2-platforms-c69dd9dfad3eb97d5e21f520f3ba35d102ec4cfa.tar.xz | |
Porting Duet module from EDKI to EDKII
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5076 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'DuetPkg/LegacyMetronome/Metronome.c')
| -rw-r--r-- | DuetPkg/LegacyMetronome/Metronome.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/DuetPkg/LegacyMetronome/Metronome.c b/DuetPkg/LegacyMetronome/Metronome.c new file mode 100644 index 0000000000..acc0dad45c --- /dev/null +++ b/DuetPkg/LegacyMetronome/Metronome.c @@ -0,0 +1,201 @@ +/*++
+
+Copyright (c) 2005, Intel Corporation
+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.
+
+Module Name:
+ LegacyMetronome.c
+
+Abstract:
+
+ This contains the installation function for the driver.
+
+--*/
+
+#include "Metronome.h"
+
+//
+// Handle for the Metronome Architectural Protocol instance produced by this driver
+//
+EFI_HANDLE mMetronomeHandle = NULL;
+
+//
+// The Metronome Architectural Protocol instance produced by this driver
+//
+EFI_METRONOME_ARCH_PROTOCOL mMetronome = {
+ WaitForTick,
+ TICK_PERIOD
+};
+
+//
+// The CPU I/O Protocol used to access system hardware
+//
+EFI_CPU_IO_PROTOCOL *mCpuIo = NULL;
+
+//
+// Worker Functions
+//
+VOID
+IoWrite8 (
+ UINT16 Port,
+ UINT8 Data
+ )
+/*++
+
+Routine Description:
+
+ Write an 8 bit value to an I/O port and save it to the S3 script
+
+Arguments:
+
+Returns:
+
+ None.
+
+--*/
+// TODO: Port - add argument and description to function comment
+// TODO: Data - add argument and description to function comment
+{
+ mCpuIo->Io.Write (
+ mCpuIo,
+ EfiCpuIoWidthUint8,
+ Port,
+ 1,
+ &Data
+ );
+
+}
+
+UINT8
+ReadRefresh (
+ VOID
+ )
+/*++
+
+Routine Description:
+
+ Read the refresh bit from the REFRESH_PORT
+
+Arguments:
+
+Returns:
+
+ None.
+
+--*/
+{
+ UINT8 Data;
+
+ mCpuIo->Io.Read (
+ mCpuIo,
+ EfiCpuIoWidthUint8,
+ REFRESH_PORT,
+ 1,
+ &Data
+ );
+ return (UINT8) (Data & REFRESH_ON);
+}
+
+EFI_STATUS
+EFIAPI
+WaitForTick (
+ IN EFI_METRONOME_ARCH_PROTOCOL *This,
+ IN UINT32 TickNumber
+ )
+/*++
+
+Routine Description:
+
+ Waits for the TickNumber of ticks from a known platform time source.
+
+Arguments:
+
+ This Pointer to the protocol instance.
+
+Returns:
+
+ EFI_SUCCESS If number of ticks occurred.
+ EFI_NOT_FOUND Could not locate CPU IO protocol
+
+--*/
+// TODO: TickNumber - add argument and description to function comment
+{
+ //
+ // Wait for TickNumber toggles of the Refresh bit
+ //
+ for (; TickNumber != 0x00; TickNumber--) {
+ while (ReadRefresh () == REFRESH_ON)
+ ;
+ while (ReadRefresh () == REFRESH_OFF)
+ ;
+ }
+
+ return EFI_SUCCESS;
+}
+
+EFI_STATUS
+EFIAPI
+InstallMetronome (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+/*++
+
+Routine Description:
+
+ Install the LegacyMetronome driver. Loads a Metronome Arch Protocol based
+ on the Port 61 timer.
+
+Arguments:
+
+ (Standard EFI Image entry - EFI_IMAGE_ENTRY_POINT)
+
+Returns:
+
+ EFI_SUCCESS - Metronome Architectural Protocol Installed
+
+--*/
+// TODO: ImageHandle - add argument and description to function comment
+// TODO: SystemTable - add argument and description to function comment
+{
+ EFI_STATUS Status;
+
+ //
+ // Make sure the Metronome Architectural Protocol is not already installed in the system
+ //
+ ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiMetronomeArchProtocolGuid);
+
+ //
+ // Get the CPU I/O Protocol that this driver requires
+ // If the CPU I/O Protocol is not found, then ASSERT because the dependency expression
+ // should guarantee that it is present in the handle database.
+ //
+ Status = gBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, &mCpuIo);
+ ASSERT_EFI_ERROR (Status);
+
+ //
+ // Program port 61 timer 1 as refresh timer. We could use ACPI timer in the
+ // future.
+ //
+ IoWrite8 (TIMER1_CONTROL_PORT, LOAD_COUNTER1_LSB);
+ IoWrite8 (TIMER1_COUNT_PORT, COUNTER1_COUNT);
+
+ //
+ // Install on a new handle
+ //
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &mMetronomeHandle,
+ &gEfiMetronomeArchProtocolGuid,
+ &mMetronome,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return Status;
+}
|