diff options
Diffstat (limited to 'MdeModulePkg/Core/Dxe/Event/Tpl.c')
| -rw-r--r-- | MdeModulePkg/Core/Dxe/Event/Tpl.c | 298 |
1 files changed, 149 insertions, 149 deletions
diff --git a/MdeModulePkg/Core/Dxe/Event/Tpl.c b/MdeModulePkg/Core/Dxe/Event/Tpl.c index b33f80573c..d7ef8eb970 100644 --- a/MdeModulePkg/Core/Dxe/Event/Tpl.c +++ b/MdeModulePkg/Core/Dxe/Event/Tpl.c @@ -1,149 +1,149 @@ -/** @file
- Task priority (TPL) functions.
-
-Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
-SPDX-License-Identifier: BSD-2-Clause-Patent
-
-**/
-
-#include "DxeMain.h"
-#include "Event.h"
-
-/**
- Set Interrupt State.
-
- @param Enable The state of enable or disable interrupt
-
-**/
-VOID
-CoreSetInterruptState (
- IN BOOLEAN Enable
- )
-{
- EFI_STATUS Status;
- BOOLEAN InSmm;
-
- if (gCpu == NULL) {
- return;
- }
-
- if (!Enable) {
- gCpu->DisableInterrupt (gCpu);
- return;
- }
-
- if (gSmmBase2 == NULL) {
- gCpu->EnableInterrupt (gCpu);
- return;
- }
-
- Status = gSmmBase2->InSmm (gSmmBase2, &InSmm);
- if (!EFI_ERROR (Status) && !InSmm) {
- gCpu->EnableInterrupt (gCpu);
- }
-}
-
-/**
- Raise the task priority level to the new level.
- High level is implemented by disabling processor interrupts.
-
- @param NewTpl New task priority level
-
- @return The previous task priority level
-
-**/
-EFI_TPL
-EFIAPI
-CoreRaiseTpl (
- IN EFI_TPL NewTpl
- )
-{
- EFI_TPL OldTpl;
-
- OldTpl = gEfiCurrentTpl;
- if (OldTpl > NewTpl) {
- DEBUG ((DEBUG_ERROR, "FATAL ERROR - RaiseTpl with OldTpl(0x%x) > NewTpl(0x%x)\n", OldTpl, NewTpl));
- ASSERT (FALSE);
- }
-
- ASSERT (VALID_TPL (NewTpl));
-
- //
- // If raising to high level, disable interrupts
- //
- if ((NewTpl >= TPL_HIGH_LEVEL) && (OldTpl < TPL_HIGH_LEVEL)) {
- CoreSetInterruptState (FALSE);
- }
-
- //
- // Set the new value
- //
- gEfiCurrentTpl = NewTpl;
-
- return OldTpl;
-}
-
-/**
- Lowers the task priority to the previous value. If the new
- priority unmasks events at a higher priority, they are dispatched.
-
- @param NewTpl New, lower, task priority
-
-**/
-VOID
-EFIAPI
-CoreRestoreTpl (
- IN EFI_TPL NewTpl
- )
-{
- EFI_TPL OldTpl;
- EFI_TPL PendingTpl;
-
- OldTpl = gEfiCurrentTpl;
- if (NewTpl > OldTpl) {
- DEBUG ((DEBUG_ERROR, "FATAL ERROR - RestoreTpl with NewTpl(0x%x) > OldTpl(0x%x)\n", NewTpl, OldTpl));
- ASSERT (FALSE);
- }
-
- ASSERT (VALID_TPL (NewTpl));
-
- //
- // If lowering below HIGH_LEVEL, make sure
- // interrupts are enabled
- //
-
- if ((OldTpl >= TPL_HIGH_LEVEL) && (NewTpl < TPL_HIGH_LEVEL)) {
- gEfiCurrentTpl = TPL_HIGH_LEVEL;
- }
-
- //
- // Dispatch any pending events
- //
- while (gEventPending != 0) {
- PendingTpl = (UINTN)HighBitSet64 (gEventPending);
- if (PendingTpl <= NewTpl) {
- break;
- }
-
- gEfiCurrentTpl = PendingTpl;
- if (gEfiCurrentTpl < TPL_HIGH_LEVEL) {
- CoreSetInterruptState (TRUE);
- }
-
- CoreDispatchEventNotifies (gEfiCurrentTpl);
- }
-
- //
- // Set the new value
- //
-
- gEfiCurrentTpl = NewTpl;
-
- //
- // If lowering below HIGH_LEVEL, make sure
- // interrupts are enabled
- //
- if (gEfiCurrentTpl < TPL_HIGH_LEVEL) {
- CoreSetInterruptState (TRUE);
- }
-}
+/** @file + Task priority (TPL) functions. + +Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> +SPDX-License-Identifier: BSD-2-Clause-Patent + +**/ + +#include "DxeMain.h" +#include "Event.h" + +/** + Set Interrupt State. + + @param Enable The state of enable or disable interrupt + +**/ +VOID +CoreSetInterruptState ( + IN BOOLEAN Enable + ) +{ + EFI_STATUS Status; + BOOLEAN InSmm; + + if (gCpu == NULL) { + return; + } + + if (!Enable) { + gCpu->DisableInterrupt (gCpu); + return; + } + + if (gSmmBase2 == NULL) { + gCpu->EnableInterrupt (gCpu); + return; + } + + Status = gSmmBase2->InSmm (gSmmBase2, &InSmm); + if (!EFI_ERROR (Status) && !InSmm) { + gCpu->EnableInterrupt (gCpu); + } +} + +/** + Raise the task priority level to the new level. + High level is implemented by disabling processor interrupts. + + @param NewTpl New task priority level + + @return The previous task priority level + +**/ +EFI_TPL +EFIAPI +CoreRaiseTpl ( + IN EFI_TPL NewTpl + ) +{ + EFI_TPL OldTpl; + + OldTpl = gEfiCurrentTpl; + if (OldTpl > NewTpl) { + DEBUG ((DEBUG_ERROR, "FATAL ERROR - RaiseTpl with OldTpl(0x%x) > NewTpl(0x%x)\n", OldTpl, NewTpl)); + ASSERT (FALSE); + } + + ASSERT (VALID_TPL (NewTpl)); + + // + // If raising to high level, disable interrupts + // + if ((NewTpl >= TPL_HIGH_LEVEL) && (OldTpl < TPL_HIGH_LEVEL)) { + CoreSetInterruptState (FALSE); + } + + // + // Set the new value + // + gEfiCurrentTpl = NewTpl; + + return OldTpl; +} + +/** + Lowers the task priority to the previous value. If the new + priority unmasks events at a higher priority, they are dispatched. + + @param NewTpl New, lower, task priority + +**/ +VOID +EFIAPI +CoreRestoreTpl ( + IN EFI_TPL NewTpl + ) +{ + EFI_TPL OldTpl; + EFI_TPL PendingTpl; + + OldTpl = gEfiCurrentTpl; + if (NewTpl > OldTpl) { + DEBUG ((DEBUG_ERROR, "FATAL ERROR - RestoreTpl with NewTpl(0x%x) > OldTpl(0x%x)\n", NewTpl, OldTpl)); + ASSERT (FALSE); + } + + ASSERT (VALID_TPL (NewTpl)); + + // + // If lowering below HIGH_LEVEL, make sure + // interrupts are enabled + // + + if ((OldTpl >= TPL_HIGH_LEVEL) && (NewTpl < TPL_HIGH_LEVEL)) { + gEfiCurrentTpl = TPL_HIGH_LEVEL; + } + + // + // Dispatch any pending events + // + while (gEventPending != 0) { + PendingTpl = (UINTN)HighBitSet64 (gEventPending); + if (PendingTpl <= NewTpl) { + break; + } + + gEfiCurrentTpl = PendingTpl; + if (gEfiCurrentTpl < TPL_HIGH_LEVEL) { + CoreSetInterruptState (TRUE); + } + + CoreDispatchEventNotifies (gEfiCurrentTpl); + } + + // + // Set the new value + // + + gEfiCurrentTpl = NewTpl; + + // + // If lowering below HIGH_LEVEL, make sure + // interrupts are enabled + // + if (gEfiCurrentTpl < TPL_HIGH_LEVEL) { + CoreSetInterruptState (TRUE); + } +} |