sravan/system76-edk2
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Update 8254 Timer driver to use IoLib instead of CPU I/O Protocol

Browse Source 
Also change the default tick rate from 54 ms to 10 ms.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6243 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney
2008-10-27 02:12:53 +00:00
parent 0f25cc149a
commit 2952f72d6d
3 changed files with 12 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
DuetPkg/8254TimerDxe/Timer.c
View File

@@ -42,11 +42,6 @@ EFI_TIMER_ARCH_PROTOCOL mTimer = {
//
EFI_CPU_ARCH_PROTOCOL *mCpu;
//
// Pointer to the CPU I/O Protocol instance
//
EFI_CPU_IO_PROTOCOL *mCpuIo;
//
// Pointer to the Legacy 8259 Protocol instance
//
@@ -86,11 +81,9 @@ Returns:
--*/
{
UINT8 Data;
Data = 0x36;
mCpuIo->Io.Write (mCpuIo, EfiCpuIoWidthUint8, TIMER_CONTROL_PORT, 1, &Data);
mCpuIo->Io.Write (mCpuIo, EfiCpuIoWidthFifoUint8, TIMER0_COUNT_PORT, 2, &Count);
IoWrite8 (TIMER_CONTROL_PORT, 0x36);
IoWrite8 (TIMER0_COUNT_PORT, (UINT8)(Count & 0xff));
IoWrite8 (TIMER0_COUNT_PORT, (UINT8)((Count >> 8) & 0xff));
}
VOID
@@ -262,6 +255,7 @@ Returns:
//
mLegacy8259->DisableIrq (mLegacy8259, Efi8259Irq0);
} else {
//
// Convert TimerPeriod into 8254 counts
//
@@ -433,12 +427,6 @@ Returns:
//
ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiTimerArchProtocolGuid);
//
// Find the CPU I/O Protocol.
//
Status = gBS->LocateProtocol (&gEfiCpuIoProtocolGuid, NULL, (VOID **) &mCpuIo);
ASSERT_EFI_ERROR (Status);
//
// Find the CPU architectural protocol.
//
@@ -481,11 +469,11 @@ Returns:
//
Status = gBS->InstallMultipleProtocolInterfaces (
&mTimerHandle,
&gEfiTimerArchProtocolGuid,
&mTimer,
&gEfiTimerArchProtocolGuid, &mTimer,
NULL
);
ASSERT_EFI_ERROR (Status);
return Status;
}