1 /** @file 2 This file is for functins related to assign and free Framework HII handle number. 3 4 Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR> 5 This program and the accompanying materials 6 are licensed and made available under the terms and conditions of the BSD License 7 which accompanies this distribution. The full text of the license may be found at 8 http://opensource.org/licenses/bsd-license.php 9 10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 12 13 **/ 14 15 16 #include "HiiHandle.h" 17 18 // 19 // FRAMEWORK_EFI_HII_HANDLE 20 // 21 UINT8 mHandle[1024 * 8] = {0}; 22 23 /** 24 25 Initialize the Framework Hii Handle database. 26 27 **/ 28 VOID 29 InitHiiHandleDatabase ( 30 VOID 31 ) 32 { 33 // 34 // FRAMEWORK_EFI_HII_HANDLE 0 is reserved. 35 // Set Bit 0 in mHandle[0] to 1. 36 // 37 mHandle[0] |= 1 << 0; 38 } 39 40 /** 41 Allocate a new Framework HII handle. 42 43 @param Handle Returns the new Framework HII Handle assigned. 44 45 @retval EFI_SUCCESS A new Framework HII Handle is assigned. 46 @retval EFI_OUT_OF_RESOURCE The Framework HII Handle database is depleted. 47 48 **/ 49 EFI_STATUS 50 AllocateHiiHandle ( 51 OUT FRAMEWORK_EFI_HII_HANDLE *Handle 52 ) 53 { 54 UINTN Index; 55 56 for (Index = 0; Index < sizeof (mHandle) * 8; Index++) { 57 if ((mHandle[Index / 8] & (1 << (Index % 8))) == 0) { 58 mHandle[Index / 8] = (UINT8) (mHandle[Index / 8] | (1 << (Index % 8))); 59 *Handle = (FRAMEWORK_EFI_HII_HANDLE) Index; 60 ASSERT (*Handle != 0); 61 return EFI_SUCCESS; 62 } 63 } 64 65 return EFI_OUT_OF_RESOURCES; 66 } 67 68 /** 69 Free Framework HII handle. 70 71 @param Handle The Framework HII Handle to be freed. 72 73 **/ 74 VOID 75 FreeHiiHandle ( 76 IN FRAMEWORK_EFI_HII_HANDLE Handle 77 ) 78 { 79 UINT16 Num; 80 81 Num = (UINT16) Handle; 82 83 ASSERT ((mHandle [Num / 8] & (1 << (Num % 8))) != 0); 84 mHandle [Num / 8] = (UINT8) (mHandle [Num / 8] & (~(1 << (Num % 8)))); 85 } 86
