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!
模块
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));
}
}
formset
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;
form
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。
subtitle
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
。
oneof
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
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:
numeric
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。
text
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。
checkbox
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:
goto
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
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,请继续关注天达云网站,小编会继续努力为大家带来更多实用的文章!