| /** @file |
| This file declares Stall PPI. |
| |
| This ppi abstracts the blocking stall service to other agents. |
| |
| Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR> |
| SPDX-License-Identifier: BSD-2-Clause-Patent |
| |
| @par Revision Reference: |
| This PPI is introduced in PI Version 1.0. |
| |
| **/ |
| |
| #ifndef __STALL_PPI_H__ |
| #define __STALL_PPI_H__ |
| |
| #define EFI_PEI_STALL_PPI_GUID \ |
| { 0x1f4c6f90, 0xb06b, 0x48d8, {0xa2, 0x01, 0xba, 0xe5, 0xf1, 0xcd, 0x7d, 0x56 } } |
| |
| typedef struct _EFI_PEI_STALL_PPI EFI_PEI_STALL_PPI; |
| |
| /** |
| The Stall() function provides a blocking stall for at least the number |
| of microseconds stipulated in the final argument of the API. |
| |
| @param PeiServices An indirect pointer to the PEI Services Table |
| published by the PEI Foundation. |
| @param This Pointer to the local data for the interface. |
| @param Microseconds Number of microseconds for which to stall. |
| |
| @retval EFI_SUCCESS The service provided at least the required delay. |
| |
| **/ |
| typedef |
| EFI_STATUS |
| (EFIAPI *EFI_PEI_STALL)( |
| IN CONST EFI_PEI_SERVICES **PeiServices, |
| IN CONST EFI_PEI_STALL_PPI *This, |
| IN UINTN Microseconds |
| ); |
| |
| /// |
| /// This service provides a simple, blocking stall with platform-specific resolution. |
| /// |
| struct _EFI_PEI_STALL_PPI { |
| /// |
| /// The resolution in microseconds of the stall services. |
| /// |
| UINTN Resolution; |
| |
| EFI_PEI_STALL Stall; |
| }; |
| |
| extern EFI_GUID gEfiPeiStallPpiGuid; |
| |
| #endif |