diff options
Diffstat (limited to 'Vlv2TbltDevicePkg/PlatformPei/Stall.c')
-rw-r--r-- | Vlv2TbltDevicePkg/PlatformPei/Stall.c | 90 |
1 files changed, 0 insertions, 90 deletions
diff --git a/Vlv2TbltDevicePkg/PlatformPei/Stall.c b/Vlv2TbltDevicePkg/PlatformPei/Stall.c deleted file mode 100644 index 5e68f80..0000000 --- a/Vlv2TbltDevicePkg/PlatformPei/Stall.c +++ /dev/null @@ -1,90 +0,0 @@ -/** @file
-
- Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
-
- SPDX-License-Identifier: BSD-2-Clause-Patent
-
-
-
-
-Module Name:
-
- Stall.c
-
-Abstract:
-
- Produce Stall Ppi.
-
---*/
-
-
-#include "CommonHeader.h"
-#include "PlatformBaseAddresses.h"
-#include "PchRegs.h"
-
-/**
- Waits for at least the given number of microseconds.
-
- @param PeiServices General purpose services available to every PEIM.
- @param This PPI instance structure.
- @param Microseconds Desired length of time to wait.
-
- @retval EFI_SUCCESS If the desired amount of time was passed.
-
-**/
-EFI_STATUS
-EFIAPI
-Stall (
- IN CONST EFI_PEI_SERVICES **PeiServices,
- IN CONST EFI_PEI_STALL_PPI *This,
- IN UINTN Microseconds
- )
-{
- UINTN Ticks;
- UINTN Counts;
- UINT32 CurrentTick;
- UINT32 OriginalTick;
- UINT32 RemainingTick;
-
- if (Microseconds == 0) {
- return EFI_SUCCESS;
- }
-
- OriginalTick = IoRead32 (ACPI_BASE_ADDRESS + R_PCH_ACPI_PM1_TMR);
- OriginalTick &= (V_PCH_ACPI_PM1_TMR_MAX_VAL - 1);
- CurrentTick = OriginalTick;
-
- //
- // The timer frequency is 3.579545MHz, so 1 ms corresponds to 3.58 clocks
- //
- Ticks = Microseconds * 358 / 100 + OriginalTick + 1;
-
- //
- // The loops needed for timer overflow
- //
- Counts = (UINTN)RShiftU64((UINT64)Ticks, 24);
-
- //
- // Remaining clocks within one loop
- //
- RemainingTick = Ticks & 0xFFFFFF;
-
- //
- // Do not intend to use TMROF_STS bit of register PM1_STS, because this add extra
- // one I/O operation, and may generate SMI
- //
- while (Counts != 0) {
- CurrentTick = IoRead32 (ACPI_BASE_ADDRESS + R_PCH_ACPI_PM1_TMR) & B_PCH_ACPI_PM1_TMR_VAL;
- if (CurrentTick <= OriginalTick) {
- Counts--;
- }
- OriginalTick = CurrentTick;
- }
-
- while ((RemainingTick > CurrentTick) && (OriginalTick <= CurrentTick)) {
- OriginalTick = CurrentTick;
- CurrentTick = IoRead32 (ACPI_BASE_ADDRESS + R_PCH_ACPI_PM1_TMR) & B_PCH_ACPI_PM1_TMR_VAL;
- }
-
- return EFI_SUCCESS;
-}
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