您好,登录后才能下订单哦!
这篇文章主要介绍“UEFI开发基础HII代码实例分析”,在日常操作中,相信很多人在UEFI开发基础HII代码实例分析问题上存在疑惑,小编查阅了各式资料,整理出简单好用的操作方法,希望对大家解答”UEFI开发基础HII代码实例分析”的疑惑有所帮助!接下来,请跟着小编一起来学习吧!
BeniPkg\DynamicCommand\SetupDynamicCommand\SetupDynamicCommand.inf。
这里通过一个命令setup来打开图形界面。图形界面的form在Page.vfr中,还有若干的uni文件存放字符串,并通过如下的代码来初始化:
EFI_HII_HANDLE InitializeHiiPackage ( IN EFI_HANDLE ImageHandle ) { EFI_STATUS Status; EFI_HII_PACKAGE_LIST_HEADER *PackageList; EFI_HII_HANDLE HiiHandle; // // Retrieve HII package list from ImageHandle. // Status = gBS->OpenProtocol ( ImageHandle, &gEfiHiiPackageListProtocolGuid, (VOID **)&PackageList, ImageHandle, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL ); if (EFI_ERROR (Status)) { return NULL; } // // Publish HII package list to HII Database. // Status = gHiiDatabase->NewPackageList ( gHiiDatabase, PackageList, NULL, &HiiHandle ); if (EFI_ERROR (Status)) { return NULL; } return HiiHandle; }
这里使用了将资源放到二进制中的方式。然后通过如下的代码来显示图形:
VOID DisplayPage ( VOID ) { EFI_STATUS Status; EFI_BROWSER_ACTION_REQUEST ActionRequest; Status = EFI_UNSUPPORTED; ActionRequest = EFI_BROWSER_ACTION_REQUEST_NONE; Status = gFormBrowser2->SendForm ( gFormBrowser2, &mSetupHiiHandle, 1, &mFrontPageGuid, 0, NULL, &ActionRequest ); if (EFI_ERROR (Status)) { DEBUG ((EFI_D_ERROR, "[BENI]SendForm failed. - %r\n", Status)); } }
一开始使用的Page.vfr文件内容:
// {76B732B8-B777-4ECF-A84E-7A8CA2484555} #define FORMSET_GUID { 0x76b732b8, 0xb777, 0x4ecf, 0xa8, 0x4e, 0x7a, 0x8c, 0xa2, 0x48, 0x45, 0x55 } formset guid = BENI_FORMSET_GUID, title = STRING_TOKEN(STR_PAGE_TITLE), help = STRING_TOKEN(STR_EMPTY_STRING), classguid = BENI_FORMSET_GUID, endformset;
只有一个formset,此时什么也不会显示出来,还需要在里面加内容,首先是一个form:
// {76B732B8-B777-4ECF-A84E-7A8CA2484555} #define BENI_FORMSET_GUID { 0x76b732b8, 0xb777, 0x4ecf, 0xa8, 0x4e, 0x7a, 0x8c, 0xa2, 0x48, 0x45, 0x55 } #define FRONT_PAGE_FORM_ID 0x1000 formset guid = BENI_FORMSET_GUID, title = STRING_TOKEN(STR_PAGE_TITLE_FORMSET), help = STRING_TOKEN(STR_EMPTY_STRING), classguid = BENI_FORMSET_GUID, form formid = FRONT_PAGE_FORM_ID, title = STRING_TOKEN(STR_PAGE_TITLE_FORM); endform; endformset;
此时得到的结果:
标题来自STR_PAGE_TITLE_FORM
,而Esc=Exit
是SendForm()
自己生成的。
之后就可以往form中添加内容。首先增加一个静态的字符串:
form formid = FRONT_PAGE_FORM_ID, title = STRING_TOKEN(STR_PAGE_TITLE_FORM); subtitle text = STRING_TOKEN(STR_PAGE_STATIC_TEXT); endform;
得到的结果:
可以看到SendForm()
自己还生成了一个↑↓=Move Highlight
。
然后增加选择框(checkbox)并伴有变量,如下所示:
efivarstore BENI_SETUP_DATA, attribute = 0x2, // EFI_VARIABLE_BOOTSERVICE_ACCESS name = BeniSetupData, guid = BENI_FORMSET_GUID; form formid = FRONT_PAGE_FORM_ID, title = STRING_TOKEN(STR_PAGE_TITLE_FORM); subtitle text = STRING_TOKEN(STR_PAGE_STATIC_TEXT); oneof varid = BeniSetupData.Data1, prompt = STRING_TOKEN(STR_SELECT_DATA_1_PROMPT), help = STRING_TOKEN(STR_SELECT_DATA_1_HELP), flags = NUMERIC_SIZE_1 | INTERACTIVE | RESET_REQUIRED, option text = STRING_TOKEN(STR_SELECT_DATA_0), value = 0, flags = DEFAULT; option text = STRING_TOKEN(STR_SELECT_DATA_1), value = 1, flags = 0; endoneof; oneof varid = BeniSetupData.Data2, prompt = STRING_TOKEN(STR_SELECT_DATA_2_PROMPT), help = STRING_TOKEN(STR_SELECT_DATA_2_HELP), flags = NUMERIC_SIZE_1 | INTERACTIVE | RESET_REQUIRED, option text = STRING_TOKEN(STR_SELECT_DATA_0), value = 0, flags = DEFAULT; option text = STRING_TOKEN(STR_SELECT_DATA_1), value = 1, flags = 0; endoneof; endform;
对应的变量结构体:
// // This is used in name of efivarstore. // #define BENI_SETUP_DATA_VAR_NAME L"BeniSetupData" typedef struct { UINT8 Data1; UINT8 Data2; UINT8 Rsvd1[2]; } BENI_SETUP_DATA;
显示结果如下:
这里可以修改值,并且保存,但是因为后端没有代码实现,所以会报错:
因此还需要增加后端的代码,这主要包含几个部分:变量的初始化,EFI_HII_CONFIG_ACCESS_PROTOCOL的实现和安装。
这里首先初始化vfr中对应的变量:
EFI_STATUS PrepareData ( VOID ) { EFI_STATUS Status; BENI_SETUP_DATA *Data; UINTN DataSize; Status = EFI_UNSUPPORTED; Data = NULL; DataSize = sizeof (BENI_SETUP_DATA); Data = AllocateZeroPool (DataSize); if (NULL == Data) { DEBUG ((EFI_D_ERROR, "[BENI]%a %d Out of memory\n", __FUNCTION__, __LINE__)); return EFI_OUT_OF_RESOURCES; } Status = gRT->GetVariable ( BENI_SETUP_DATA_VAR_NAME, &gBeniSetupFormSetGuid, NULL, &DataSize, Data ); if (EFI_ERROR (Status)) { if (EFI_NOT_FOUND == Status) { DEBUG ((EFI_D_ERROR, "[BENI]Initialize Setup data\n")); Data->Data1 = 1; Data->Data2 = 1; DataSize = sizeof (BENI_SETUP_DATA); Status = gRT->SetVariable ( BENI_SETUP_DATA_VAR_NAME, &gBeniSetupFormSetGuid, EFI_VARIABLE_BOOTSERVICE_ACCESS, DataSize, Data ); DEBUG ((EFI_D_ERROR, "[BENI]Status: - %r\n", Status)); } } return Status; }
这个本身意义不大,就是初始化和设置了一个变量而已,变量的值是1(所以显示的不再是Zero,而是One),这在界面中也会体现出来。然后就是安装EFI_HII_CONFIG_ACCESS_PROTOCOL:
mPrivateData->ConfigAccess.ExtractConfig = ExtractConfig; mPrivateData->ConfigAccess.RouteConfig = RouteConfig; mPrivateData->ConfigAccess.Callback = DriverCallback; // // Publish sample formset. // Status = gBS->InstallMultipleProtocolInterfaces ( &mPrivateData->DriverHandle, &gEfiDevicePathProtocolGuid, &mHiiVendorDevicePath, &gEfiHiiConfigAccessProtocolGuid, &mPrivateData->ConfigAccess, NULL );
这里的DriverCallback()
等函数可以根据实际情况来实现,目前只是增加了打印信息而已,在操作上述的选择框时会被调用并输出信息。
string是一个可编辑的字符串,编辑之后可以保存到变量,下面是一个示例:
string varid = BeniSetupData.DriverDescriptionData, questionid = PAGE_DESCRIPTION_ID, prompt = STRING_TOKEN(STR_STRING_DESC_PROMPT), help = STRING_TOKEN(STR_STRING_HELPER), flags = INTERACTIVE, minsize = 6, maxsize = 30, endstring;
DriverDescriptionData
是变量BeniSetupData
的成员,它也可以预先初始化(本例中初始化成“Hello World”),PAGE_DESCRIPTION_ID
可以在EFI_HII_CONFIG_ACCESS_PROTOCOL
的Callback()
中定位,此外还有一些帮助信息、大小和操作限制等等配置。
下面是显示结果:
没什么好说的,就是数字:
numeric varid = BeniSetupData.Id, prompt = STRING_TOKEN(STR_NUMERIC_ID_PROMPT), help = STRING_TOKEN(STR_NUMERIC_ID_HELPER), minimum = 0, maximum = 1024, endnumeric;
下面是显示的结果:
跟string类似,只不过只能输入数字,通过flag
的配置,可以选择使用十进制还是十六进制。
跟subtitle不同的是,text可以被选中,下面是一个例子:
text help = STRING_TOKEN(STR_TEXT_PROMPT), text = STRING_TOKEN(STR_TEXT_HELPER), flags = INTERACTIVE, key = PAGE_TEXT_ID;
PAGE_TEXT_ID
在EFI_HII_CONFIG_ACCESS_PROTOCOL
的Callback()
中使用:
EFI_STATUS EFIAPI DriverCallback ( IN CONST EFI_HII_CONFIG_ACCESS_PROTOCOL *This, IN EFI_BROWSER_ACTION Action, IN EFI_QUESTION_ID QuestionId, IN UINT8 Type, IN EFI_IFR_TYPE_VALUE *Value, OUT EFI_BROWSER_ACTION_REQUEST *ActionRequest ) { BENI_MODULE_START if (Action == EFI_BROWSER_ACTION_CHANGING) { switch (QuestionId) { case PAGE_TEXT_ID: DEBUG ((DEBUG_ERROR, "%a %d PAGE_TEXT_ID\n", __FUNCTION__, __LINE__)); break; default: break; } } else if (Action == EFI_BROWSER_ACTION_CHANGED) { switch (QuestionId) { case PAGE_TEXT_ID: DEBUG ((DEBUG_ERROR, "%a %d PAGE_TEXT_ID\n", __FUNCTION__, __LINE__)); break; default: break; } } BENI_MODULE_END return EFI_SUCCESS; }
显示如下:
可以看到text
那一行可以被选中,点击之后可以看到打印信息:
[BENI]DriverCallback start... DriverCallback 138 PAGE_TEXT_ID [BENI]DriverCallback end... [BENI]DriverCallback start... DriverCallback 146 PAGE_TEXT_ID [BENI]DriverCallback end...
之所以能够操作这一行,原始主要在于flags = INTERACTIVE,
,这样就会创建一个EFI_IFR_ACTION
的操作码,相当于植入了一个可操作的动作。
勾选框,只有TRUE和FALSE,或者0和1两个值。下面是一个示例:
grayoutif ideqval BeniSetupData.Disabled == 1; text help = STRING_TOKEN(STR_TEXT_PROMPT), text = STRING_TOKEN(STR_TEXT_HELPER), flags = INTERACTIVE, key = PAGE_TEXT_ID; endif; checkbox varid = BeniSetupData.Disabled, prompt = STRING_TOKEN(STR_CHECKBOXK_PROMPT), help = STRING_TOKEN(STR_CHECKBOXK_HELPER), flags = CHECKBOX_DEFAULT, endcheckbox;
这里还使用了grayoutif
,选中之后之前测试用的text
会变灰,如下所示:
用于跳转到另外的界面:
goto PAGE_FORM_ID_2, prompt = STRING_TOKEN(STR_GOTO_PROMPT), help = STRING_TOKEN(STR_GOTO_HELPER); endform; form formid = PAGE_FORM_ID_2, title = STRING_TOKEN(STR_PAGE_TITLE_FORM_2); subtitle text = STRING_TOKEN(STR_PAGE_NETX_PAGE); endform;
显示的结果:
label相当于一个VFR中的一个占位符,本身不会产生可显示的内容,而是需要通过代码动态的增加显示内容,具体如何增加,就是使用之前介绍的HiiCreateXXX()
函数在增加form组件。下面是label的示例:
#define LABEL_START 0x1004#define LABEL_END 0x1005 form formid = PAGE_FORM_ID_2, title = STRING_TOKEN(STR_PAGE_TITLE_FORM_2); subtitle text = STRING_TOKEN(STR_PAGE_NETX_PAGE); subtitle text = STRING_TOKEN(STR_EMPTY_STRING); label LABEL_START; label LABEL_END; endform;
可以看到这里只是增加了两个label
而已,真正的操作还是在代码中:
/** Customize menus in the page. @param[in] HiiHandle The HII Handle of the form to update. @param[in] StartOpCodeHandle The context used to insert opcode. @retval NA **/ VOID CustomizePage ( IN EFI_HII_HANDLE HiiHandle, IN VOID *StartOpCodeHandle ) { // // Add OpCode here. // HiiCreateSubTitleOpCode (StartOpCodeHandle, STRING_TOKEN (STR_TEXT_IN_CODE), 0, 0, 0); } /** Update components. @param NA @retval NA **/ VOID UpdatePageForm ( VOID ) { VOID *StartOpCodeHandle; VOID *EndOpCodeHandle; EFI_IFR_GUID_LABEL *StartGuidLabel; EFI_IFR_GUID_LABEL *EndGuidLabel; // // Allocate space for creation of UpdateData Buffer // StartOpCodeHandle = HiiAllocateOpCodeHandle (); ASSERT (StartOpCodeHandle != NULL); EndOpCodeHandle = HiiAllocateOpCodeHandle (); ASSERT (EndOpCodeHandle != NULL); // // Create Hii Extend Label OpCode as the start opcode // StartGuidLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (StartOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL)); StartGuidLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL; StartGuidLabel->Number = LABEL_START; // // Create Hii Extend Label OpCode as the end opcode // EndGuidLabel = (EFI_IFR_GUID_LABEL *) HiiCreateGuidOpCode (EndOpCodeHandle, &gEfiIfrTianoGuid, NULL, sizeof (EFI_IFR_GUID_LABEL)); EndGuidLabel->ExtendOpCode = EFI_IFR_EXTEND_OP_LABEL; EndGuidLabel->Number = LABEL_END; CustomizePage ( mPrivateData->SetupHiiHandle, StartOpCodeHandle ); HiiUpdateForm ( mPrivateData->SetupHiiHandle, &gBeniSetupFormSetGuid, PAGE_FORM_ID_2, StartOpCodeHandle, EndOpCodeHandle ); return; }
得到的结果如下,红色部分就是通过代码生成的:
到此,关于“UEFI开发基础HII代码实例分析”的学习就结束了,希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习,快去试试吧!若想继续学习更多相关知识,请继续关注亿速云网站,小编会继续努力为大家带来更多实用的文章!
免责声明:本站发布的内容(图片、视频和文字)以原创、转载和分享为主,文章观点不代表本网站立场,如果涉及侵权请联系站长邮箱:is@yisu.com进行举报,并提供相关证据,一经查实,将立刻删除涉嫌侵权内容。