MdeModulePkg/Universal/SetupBrowserDxe/Setup.h

   1 /** @file
   2 Private MACRO, structure and function definitions for Setup Browser module.
   3
   4 Copyright (c) 2007 - 2015, 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 #ifndef _SETUP_H_
  17 #define _SETUP_H_
  18
  19
  20 #include <PiDxe.h>
  21
  22 #include <Protocol/SimpleTextOut.h>
  23 #include <Protocol/SimpleTextIn.h>
  24 #include <Protocol/FormBrowser2.h>
  25 #include <Protocol/FormBrowserEx2.h>
  26 #include <Protocol/DisplayProtocol.h>
  27 #include <Protocol/DevicePath.h>
  28 #include <Protocol/UnicodeCollation.h>
  29 #include <Protocol/HiiConfigAccess.h>
  30 #include <Protocol/HiiConfigRouting.h>
  31 #include <Protocol/HiiDatabase.h>
  32 #include <Protocol/HiiString.h>
  33 #include <Protocol/UserManager.h>
  34 #include <Protocol/DevicePathFromText.h>
  35 #include <Protocol/RegularExpressionProtocol.h>
  36
  37 #include <Guid/MdeModuleHii.h>
  38 #include <Guid/HiiPlatformSetupFormset.h>
  39 #include <Guid/HiiFormMapMethodGuid.h>
  40
  41 #include <Library/PrintLib.h>
  42 #include <Library/DebugLib.h>
  43 #include <Library/BaseMemoryLib.h>
  44 #include <Library/UefiRuntimeServicesTableLib.h>
  45 #include <Library/UefiDriverEntryPoint.h>
  46 #include <Library/UefiBootServicesTableLib.h>
  47 #include <Library/BaseLib.h>
  48 #include <Library/MemoryAllocationLib.h>
  49 #include <Library/HiiLib.h>
  50 #include <Library/PcdLib.h>
  51 #include <Library/DevicePathLib.h>
  52 #include <Library/UefiLib.h>
  53
  54
  55 //
  56 // This is the generated header file which includes whatever needs to be exported (strings + IFR)
  57 //
  58
  59 #define UI_ACTION_NONE               0
  60 #define UI_ACTION_REFRESH_FORM       1
  61 #define UI_ACTION_REFRESH_FORMSET    2
  62 #define UI_ACTION_EXIT               3
  63
  64 //
  65 //
  66 // Time definitions
  67 //
  68 #define ONE_SECOND  10000000
  69
  70 // Incremental string lenght of ConfigRequest
  71 //
  72 #define CONFIG_REQUEST_STRING_INCREMENTAL  1024
  73
  74 //
  75 // Incremental size of stack for expression
  76 //
  77 #define EXPRESSION_STACK_SIZE_INCREMENT    0x100
  78
  79 #define EFI_IFR_SPECIFICATION_VERSION  (UINT16) (((EFI_SYSTEM_TABLE_REVISION >> 16) << 8) | (((EFI_SYSTEM_TABLE_REVISION & 0xFFFF) / 10) << 4) | ((EFI_SYSTEM_TABLE_REVISION & 0xFFFF) % 10))
  80
  81
  82 #define SETUP_DRIVER_SIGNATURE SIGNATURE_32 ('F', 'B', 'D', 'V')
  83 typedef struct {
  84   UINT32                             Signature;
  85
  86   EFI_HANDLE                         Handle;
  87
  88   //
  89   // Produced protocol
  90   //
  91   EFI_FORM_BROWSER2_PROTOCOL            FormBrowser2;
  92   EFI_FORM_BROWSER_EXTENSION_PROTOCOL   FormBrowserEx;
  93
  94   EDKII_FORM_BROWSER_EXTENSION2_PROTOCOL FormBrowserEx2;
  95
  96 } SETUP_DRIVER_PRIVATE_DATA;
  97
  98 //
  99 // IFR relative definition
 100 //
 101 #define EFI_HII_EXPRESSION_INCONSISTENT_IF   0
 102 #define EFI_HII_EXPRESSION_NO_SUBMIT_IF      1
 103 #define EFI_HII_EXPRESSION_GRAY_OUT_IF       2
 104 #define EFI_HII_EXPRESSION_SUPPRESS_IF       3
 105 #define EFI_HII_EXPRESSION_DISABLE_IF        4
 106 #define EFI_HII_EXPRESSION_VALUE             5
 107 #define EFI_HII_EXPRESSION_RULE              6
 108 #define EFI_HII_EXPRESSION_READ              7
 109 #define EFI_HII_EXPRESSION_WRITE             8
 110 #define EFI_HII_EXPRESSION_WARNING_IF        9
 111
 112 #define EFI_HII_VARSTORE_BUFFER              0
 113 #define EFI_HII_VARSTORE_NAME_VALUE          1
 114 #define EFI_HII_VARSTORE_EFI_VARIABLE        2    // EFI Varstore type follow UEFI spec before 2.3.1.
 115 #define EFI_HII_VARSTORE_EFI_VARIABLE_BUFFER 3    // EFI varstore type follow UEFI spec 2.3.1 and later.
 116
 117 #define FORM_INCONSISTENT_VALIDATION         0
 118 #define FORM_NO_SUBMIT_VALIDATION            1
 119
 120 #define NAME_VALUE_NODE_SIGNATURE  SIGNATURE_32 ('N', 'V', 'S', 'T')
 121
 122 typedef struct {
 123   UINTN            Signature;
 124   LIST_ENTRY       Link;
 125   CHAR16           *Name;
 126   CHAR16           *Value;
 127   CHAR16           *EditValue;
 128 } NAME_VALUE_NODE;
 129
 130 #define NAME_VALUE_NODE_FROM_LINK(a)  CR (a, NAME_VALUE_NODE, Link, NAME_VALUE_NODE_SIGNATURE)
 131
 132 #define BROWSER_STORAGE_SIGNATURE  SIGNATURE_32 ('B', 'S', 'T', 'G')
 133
 134 typedef struct {
 135   UINTN            Signature;
 136   LIST_ENTRY       Link;
 137
 138   UINT8            Type;           // Storage type
 139
 140   BOOLEAN          Initialized;    // Whether this varstore is initialized, efi varstore not used.
 141
 142   EFI_HII_HANDLE   HiiHandle;      // HiiHandle for this varstore, efi varstore not used.
 143   EFI_GUID         Guid;
 144
 145   CHAR16           *Name;          // For EFI_IFR_VARSTORE
 146   UINT16           Size;
 147   UINT8            *Buffer;
 148   UINT8            *EditBuffer;    // Edit copy for Buffer Storage
 149
 150   LIST_ENTRY       NameValueListHead; // List of NAME_VALUE_NODE
 151
 152   UINT32           Attributes;     // For EFI_IFR_VARSTORE_EFI: EFI Variable attribute
 153
 154   CHAR16           *ConfigRequest; // <ConfigRequest> = <ConfigHdr> + <RequestElement>
 155                                    // <RequestElement> includes all fields which is used by current form sets.
 156   UINTN            SpareStrLen;    // Spare length of ConfigRequest string buffer
 157 } BROWSER_STORAGE;
 158
 159 #define BROWSER_STORAGE_FROM_LINK(a)  CR (a, BROWSER_STORAGE, Link, BROWSER_STORAGE_SIGNATURE)
 160
 161 #define FORMSET_STORAGE_SIGNATURE  SIGNATURE_32 ('F', 'S', 'T', 'G')
 162
 163 typedef struct {
 164   UINTN            Signature;
 165   LIST_ENTRY       Link;
 166
 167   LIST_ENTRY       SaveFailLink;
 168
 169   UINT16           VarStoreId;
 170
 171   BROWSER_STORAGE  *BrowserStorage;
 172
 173   CHAR16           *ConfigHdr;     // <ConfigHdr>
 174
 175   CHAR16           *ConfigRequest; // <ConfigRequest> = <ConfigHdr> + <RequestElement>
 176   CHAR16           *ConfigAltResp; // Alt config response string for this ConfigRequest.
 177   BOOLEAN          HasCallAltCfg;  // Flag to show whether browser has call ExtractConfig to get Altcfg string.
 178   UINTN            ElementCount;   // Number of <RequestElement> in the <ConfigRequest>
 179   UINTN            SpareStrLen;    // Spare length of ConfigRequest string buffer
 180 } FORMSET_STORAGE;
 181
 182 #define FORMSET_STORAGE_FROM_LINK(a)  CR (a, FORMSET_STORAGE, Link, FORMSET_STORAGE_SIGNATURE)
 183 #define FORMSET_STORAGE_FROM_SAVE_FAIL_LINK(a)  CR (a, FORMSET_STORAGE, SaveFailLink, FORMSET_STORAGE_SIGNATURE)
 184
 185 typedef union {
 186   EFI_STRING_ID         VarName;
 187   UINT16                VarOffset;
 188 } VAR_STORE_INFO;
 189
 190 #define EXPRESSION_OPCODE_SIGNATURE  SIGNATURE_32 ('E', 'X', 'O', 'P')
 191
 192 typedef struct {
 193   UINTN             Signature;
 194   LIST_ENTRY        Link;
 195
 196   UINT8             Operand;
 197
 198   UINT8             Format;      // For EFI_IFR_TO_STRING, EFI_IFR_FIND
 199   UINT8             Flags;       // For EFI_IFR_SPAN
 200   UINT8             RuleId;      // For EFI_IFR_RULE_REF
 201
 202   EFI_HII_VALUE     Value;       // For EFI_IFR_EQ_ID_VAL, EFI_IFR_UINT64, EFI_IFR_UINT32, EFI_IFR_UINT16, EFI_IFR_UINT8, EFI_IFR_STRING_REF1
 203
 204   EFI_QUESTION_ID   QuestionId;  // For EFI_IFR_EQ_ID_ID, EFI_IFR_EQ_ID_VAL_LIST, EFI_IFR_QUESTION_REF1
 205   EFI_QUESTION_ID   QuestionId2;
 206
 207   UINT16            ListLength;  // For EFI_IFR_EQ_ID_VAL_LIST
 208   UINT16            *ValueList;
 209
 210   EFI_STRING_ID     DevicePath;  // For EFI_IFR_QUESTION_REF3_2, EFI_IFR_QUESTION_REF3_3
 211   EFI_GUID          Guid;
 212
 213   BROWSER_STORAGE   *VarStorage; // For EFI_IFR_SET, EFI_IFR_GET
 214   VAR_STORE_INFO    VarStoreInfo;// For EFI_IFR_SET, EFI_IFR_GET
 215   UINT8             ValueType;   // For EFI_IFR_SET, EFI_IFR_GET
 216   UINT8             ValueWidth;  // For EFI_IFR_SET, EFI_IFR_GET
 217   CHAR16            *ValueName;  // For EFI_IFR_SET, EFI_IFR_GET
 218   LIST_ENTRY        MapExpressionList;   // nested expressions inside of Map opcode.
 219 } EXPRESSION_OPCODE;
 220
 221 #define EXPRESSION_OPCODE_FROM_LINK(a)  CR (a, EXPRESSION_OPCODE, Link, EXPRESSION_OPCODE_SIGNATURE)
 222
 223 #define FORM_EXPRESSION_SIGNATURE  SIGNATURE_32 ('F', 'E', 'X', 'P')
 224
 225 typedef struct {
 226   UINTN             Signature;
 227   LIST_ENTRY        Link;
 228
 229   UINT8             Type;            // Type for this expression
 230
 231   UINT8             RuleId;          // For EFI_IFR_RULE only
 232   EFI_STRING_ID     Error;           // For EFI_IFR_NO_SUBMIT_IF, EFI_IFR_INCONSISTENT_IF only
 233
 234   EFI_HII_VALUE     Result;          // Expression evaluation result
 235
 236   UINT8             TimeOut;         // For EFI_IFR_WARNING_IF
 237   EFI_IFR_OP_HEADER *OpCode;         // Save the opcode buffer.
 238
 239   LIST_ENTRY        OpCodeListHead;  // OpCodes consist of this expression (EXPRESSION_OPCODE)
 240 } FORM_EXPRESSION;
 241
 242 #define FORM_EXPRESSION_FROM_LINK(a)  CR (a, FORM_EXPRESSION, Link, FORM_EXPRESSION_SIGNATURE)
 243
 244 #define FORM_EXPRESSION_LIST_SIGNATURE  SIGNATURE_32 ('F', 'E', 'X', 'R')
 245
 246 typedef struct {
 247     UINTN               Signature;
 248     UINTN               Count;
 249     FORM_EXPRESSION    *Expression[1];   // Array[Count] of expressions
 250 } FORM_EXPRESSION_LIST;
 251
 252 #define QUESTION_DEFAULT_SIGNATURE  SIGNATURE_32 ('Q', 'D', 'F', 'T')
 253
 254 typedef struct {
 255   UINTN               Signature;
 256   LIST_ENTRY          Link;
 257
 258   UINT16              DefaultId;
 259   EFI_HII_VALUE       Value;              // Default value
 260
 261   FORM_EXPRESSION     *ValueExpression;   // Not-NULL indicates default value is provided by EFI_IFR_VALUE
 262 } QUESTION_DEFAULT;
 263
 264 #define QUESTION_DEFAULT_FROM_LINK(a)  CR (a, QUESTION_DEFAULT, Link, QUESTION_DEFAULT_SIGNATURE)
 265
 266 #define QUESTION_OPTION_SIGNATURE  SIGNATURE_32 ('Q', 'O', 'P', 'T')
 267
 268 typedef struct {
 269   UINTN                Signature;
 270   LIST_ENTRY           Link;
 271
 272   EFI_IFR_ONE_OF_OPTION  *OpCode;   // OneOfOption Data
 273
 274   EFI_STRING_ID        Text;
 275   UINT8                Flags;
 276   EFI_HII_VALUE        Value;
 277   EFI_IMAGE_ID         ImageId;
 278
 279   FORM_EXPRESSION_LIST *SuppressExpression; // Non-NULL indicates nested inside of SuppressIf
 280 } QUESTION_OPTION;
 281
 282 #define QUESTION_OPTION_FROM_LINK(a)  CR (a, QUESTION_OPTION, Link, QUESTION_OPTION_SIGNATURE)
 283
 284 typedef enum {
 285   ExpressFalse = 0,
 286   ExpressGrayOut,
 287   ExpressSuppress,
 288   ExpressDisable
 289 } EXPRESS_RESULT;
 290
 291 typedef enum {
 292   ExpressNone = 0,
 293   ExpressForm,
 294   ExpressStatement,
 295   ExpressOption
 296 } EXPRESS_LEVEL;
 297
 298 typedef struct _FORM_BROWSER_STATEMENT FORM_BROWSER_STATEMENT;
 299
 300 #define FORM_BROWSER_STATEMENT_SIGNATURE  SIGNATURE_32 ('F', 'S', 'T', 'A')
 301
 302 struct _FORM_BROWSER_STATEMENT{
 303   UINTN                 Signature;
 304   LIST_ENTRY            Link;
 305
 306   UINT8                 Operand;          // The operand (first byte) of this Statement or Question
 307   EFI_IFR_OP_HEADER     *OpCode;
 308
 309   //
 310   // Statement Header
 311   //
 312   EFI_STRING_ID         Prompt;
 313   EFI_STRING_ID         Help;
 314   EFI_STRING_ID         TextTwo;          // For EFI_IFR_TEXT
 315
 316   //
 317   // Fake Question Id, used for statement not has true QuestionId.
 318   //
 319   EFI_QUESTION_ID       FakeQuestionId;
 320
 321   //
 322   // Question Header
 323   //
 324   EFI_QUESTION_ID       QuestionId;       // The value of zero is reserved
 325   EFI_VARSTORE_ID       VarStoreId;       // A value of zero indicates no variable storage
 326   BROWSER_STORAGE       *Storage;
 327   VAR_STORE_INFO        VarStoreInfo;
 328   UINT16                StorageWidth;
 329   UINT8                 QuestionFlags;
 330   CHAR16                *VariableName;    // Name/Value or EFI Variable name
 331   CHAR16                *BlockName;       // Buffer storage block name: "OFFSET=...WIDTH=..."
 332
 333   EFI_HII_VALUE         HiiValue;         // Edit copy for checkbox, numberic, oneof
 334   UINT8                 *BufferValue;     // Edit copy for string, password, orderedlist
 335   UINT8                 ValueType;        // Data type for orderedlist value array
 336
 337   //
 338   // OpCode specific members
 339   //
 340   UINT8                 Flags;            // for EFI_IFR_CHECKBOX, EFI_IFR_DATE, EFI_IFR_NUMERIC, EFI_IFR_ONE_OF,
 341                                           // EFI_IFR_ORDERED_LIST, EFI_IFR_STRING,EFI_IFR_SUBTITLE,EFI_IFR_TIME, EFI_IFR_BANNER
 342   UINT8                 MaxContainers;    // for EFI_IFR_ORDERED_LIST
 343
 344   UINT16                BannerLineNumber; // for EFI_IFR_BANNER, 1-based line number
 345   EFI_STRING_ID         QuestionConfig;   // for EFI_IFR_ACTION, if 0 then no configuration string will be processed
 346
 347   UINT64                Minimum;          // for EFI_IFR_ONE_OF/EFI_IFR_NUMERIC, it's Min/Max value
 348   UINT64                Maximum;          // for EFI_IFR_STRING/EFI_IFR_PASSWORD, it's Min/Max length
 349   UINT64                Step;
 350
 351   EFI_DEFAULT_ID        DefaultId;        // for EFI_IFR_RESET_BUTTON
 352   EFI_GUID              RefreshGuid;      // for EFI_IFR_REFRESH_ID
 353   BOOLEAN               Locked;           // Whether this statement is locked.
 354   BOOLEAN               ValueChanged;     // Whether this statement's value is changed.
 355   //
 356   // Get from IFR parsing
 357   //
 358   FORM_EXPRESSION       *ValueExpression;    // nested EFI_IFR_VALUE, provide Question value and indicate Question is ReadOnly
 359   LIST_ENTRY            DefaultListHead;     // nested EFI_IFR_DEFAULT list (QUESTION_DEFAULT), provide default values
 360   LIST_ENTRY            OptionListHead;      // nested EFI_IFR_ONE_OF_OPTION list (QUESTION_OPTION)
 361
 362   EFI_IMAGE_ID          ImageId;             // nested EFI_IFR_IMAGE
 363   UINT8                 RefreshInterval;     // nested EFI_IFR_REFRESH, refresh interval(in seconds) for Question value, 0 means no refresh
 364
 365   FORM_BROWSER_STATEMENT *ParentStatement;
 366
 367   LIST_ENTRY            InconsistentListHead;// nested inconsistent expression list (FORM_EXPRESSION)
 368   LIST_ENTRY            NoSubmitListHead;    // nested nosubmit expression list (FORM_EXPRESSION)
 369   LIST_ENTRY            WarningListHead;     // nested warning expression list (FORM_EXPRESSION)
 370   FORM_EXPRESSION_LIST  *Expression;         // nesting inside of GrayOutIf/DisableIf/SuppressIf
 371
 372   FORM_EXPRESSION       *ReadExpression;     // nested EFI_IFR_READ, provide this question value by read expression.
 373   FORM_EXPRESSION       *WriteExpression;    // nested EFI_IFR_WRITE, evaluate write expression after this question value is set.
 374 };
 375
 376 #define FORM_BROWSER_STATEMENT_FROM_LINK(a)  CR (a, FORM_BROWSER_STATEMENT, Link, FORM_BROWSER_STATEMENT_SIGNATURE)
 377
 378 #define FORM_BROWSER_CONFIG_REQUEST_SIGNATURE  SIGNATURE_32 ('F', 'C', 'R', 'S')
 379 typedef struct {
 380   UINTN                 Signature;
 381   LIST_ENTRY            Link;
 382
 383   LIST_ENTRY            SaveFailLink;
 384
 385   CHAR16                *ConfigRequest; // <ConfigRequest> = <ConfigHdr> + <RequestElement>
 386   CHAR16                *ConfigAltResp; // Alt config response string for this ConfigRequest.
 387   UINTN                 ElementCount;   // Number of <RequestElement> in the <ConfigRequest>
 388   UINTN                 SpareStrLen;
 389
 390   BROWSER_STORAGE       *Storage;
 391 } FORM_BROWSER_CONFIG_REQUEST;
 392 #define FORM_BROWSER_CONFIG_REQUEST_FROM_LINK(a)  CR (a, FORM_BROWSER_CONFIG_REQUEST, Link, FORM_BROWSER_CONFIG_REQUEST_SIGNATURE)
 393 #define FORM_BROWSER_CONFIG_REQUEST_FROM_SAVE_FAIL_LINK(a)  CR (a, FORM_BROWSER_CONFIG_REQUEST, SaveFailLink, FORM_BROWSER_CONFIG_REQUEST_SIGNATURE)
 394
 395 #define FORM_BROWSER_FORM_SIGNATURE  SIGNATURE_32 ('F', 'F', 'R', 'M')
 396 #define STANDARD_MAP_FORM_TYPE 0x01
 397
 398 typedef struct {
 399   UINTN                Signature;
 400   LIST_ENTRY           Link;
 401
 402   UINT16               FormId;               // FormId of normal form or formmap form.
 403   EFI_STRING_ID        FormTitle;            // FormTile of normal form, or FormMapMethod title of formmap form.
 404   UINT16               FormType;             // Specific form type for the different form.
 405
 406   EFI_IMAGE_ID         ImageId;
 407
 408   BOOLEAN              ModalForm;            // Whether this is a modal form.
 409   BOOLEAN              Locked;               // Whether this form is locked.
 410   EFI_GUID             RefreshGuid;          // Form refresh event guid.
 411
 412   LIST_ENTRY           FormViewListHead;     // List of type FORMID_INFO is Browser View Form History List.
 413   LIST_ENTRY           ExpressionListHead;   // List of Expressions (FORM_EXPRESSION)
 414   LIST_ENTRY           StatementListHead;    // List of Statements and Questions (FORM_BROWSER_STATEMENT)
 415   LIST_ENTRY           ConfigRequestHead;    // List of configreques for all storage.
 416   FORM_EXPRESSION_LIST *SuppressExpression;  // nesting inside of SuppressIf
 417 } FORM_BROWSER_FORM;
 418
 419 #define FORM_BROWSER_FORM_FROM_LINK(a)  CR (a, FORM_BROWSER_FORM, Link, FORM_BROWSER_FORM_SIGNATURE)
 420
 421 #define FORMSET_DEFAULTSTORE_SIGNATURE  SIGNATURE_32 ('F', 'D', 'F', 'S')
 422
 423 typedef struct {
 424   UINTN            Signature;
 425   LIST_ENTRY       Link;
 426
 427   UINT16           DefaultId;
 428   EFI_STRING_ID    DefaultName;
 429 } FORMSET_DEFAULTSTORE;
 430
 431 #define FORMSET_DEFAULTSTORE_FROM_LINK(a)  CR (a, FORMSET_DEFAULTSTORE, Link, FORMSET_DEFAULTSTORE_SIGNATURE)
 432
 433 #define FORM_BROWSER_FORMSET_SIGNATURE  SIGNATURE_32 ('F', 'B', 'F', 'S')
 434
 435 typedef struct {
 436   UINTN                           Signature;
 437   LIST_ENTRY                      Link;
 438   LIST_ENTRY                      SaveFailLink;
 439
 440   EFI_HII_HANDLE                  HiiHandle;      // unique id for formset.
 441   EFI_HANDLE                      DriverHandle;
 442   EFI_HII_CONFIG_ACCESS_PROTOCOL  *ConfigAccess;
 443   EFI_DEVICE_PATH_PROTOCOL        *DevicePath;
 444
 445   UINTN                           IfrBinaryLength;
 446   UINT8                           *IfrBinaryData;
 447
 448   BOOLEAN                         QuestionInited;   // Have finished question initilization?
 449   EFI_GUID                        Guid;
 450   EFI_STRING_ID                   FormSetTitle;
 451   EFI_STRING_ID                   Help;
 452   UINT8                           NumberOfClassGuid;
 453   EFI_GUID                        ClassGuid[3];         // Up to three ClassGuid
 454   UINT16                          Class;                // Tiano extended Class code
 455   UINT16                          SubClass;             // Tiano extended Subclass code
 456   EFI_IMAGE_ID                    ImageId;
 457
 458   FORM_BROWSER_STATEMENT          *StatementBuffer;     // Buffer for all Statements and Questions
 459   EXPRESSION_OPCODE               *ExpressionBuffer;    // Buffer for all Expression OpCode
 460   FORM_BROWSER_FORM               *SaveFailForm;        // The form which failed to save.
 461   FORM_BROWSER_STATEMENT          *SaveFailStatement;   // The Statement which failed to save.
 462
 463   LIST_ENTRY                      StatementListOSF;     // Statement list out side of the form.
 464   LIST_ENTRY                      StorageListHead;      // Storage list (FORMSET_STORAGE)
 465   LIST_ENTRY                      SaveFailStorageListHead; // Storage list for the save fail storage.
 466   LIST_ENTRY                      DefaultStoreListHead; // DefaultStore list (FORMSET_DEFAULTSTORE)
 467   LIST_ENTRY                      FormListHead;         // Form list (FORM_BROWSER_FORM)
 468   LIST_ENTRY                      ExpressionListHead;   // List of Expressions (FORM_EXPRESSION)
 469 } FORM_BROWSER_FORMSET;
 470 #define FORM_BROWSER_FORMSET_FROM_LINK(a)  CR (a, FORM_BROWSER_FORMSET, Link, FORM_BROWSER_FORMSET_SIGNATURE)
 471
 472 #define FORM_BROWSER_FORMSET_FROM_SAVE_FAIL_LINK(a)  CR (a, FORM_BROWSER_FORMSET, SaveFailLink, FORM_BROWSER_FORMSET_SIGNATURE)
 473
 474 typedef struct {
 475   LIST_ENTRY   Link;
 476   EFI_EVENT    RefreshEvent;
 477 } FORM_BROWSER_REFRESH_EVENT_NODE;
 478
 479 #define FORM_BROWSER_REFRESH_EVENT_FROM_LINK(a) BASE_CR (a, FORM_BROWSER_REFRESH_EVENT_NODE, Link)
 480
 481
 482 typedef struct {
 483   EFI_HII_HANDLE  Handle;
 484
 485   //
 486   // Target formset/form/Question information
 487   //
 488   EFI_GUID        FormSetGuid;
 489   UINT16          FormId;
 490   UINT16          QuestionId;
 491   UINTN           Sequence;  // used for time/date only.
 492
 493   UINTN           TopRow;
 494   UINTN           BottomRow;
 495   UINTN           PromptCol;
 496   UINTN           OptionCol;
 497   UINTN           CurrentRow;
 498
 499   //
 500   // Ation for Browser to taken:
 501   //   UI_ACTION_NONE            - navigation inside a form
 502   //   UI_ACTION_REFRESH_FORM    - re-evaluate expressions and repaint form
 503   //   UI_ACTION_REFRESH_FORMSET - re-parse formset IFR binary
 504   //
 505   UINTN           Action;
 506
 507   //
 508   // Current selected fomset/form/Question
 509   //
 510   FORM_BROWSER_FORMSET    *FormSet;
 511   FORM_BROWSER_FORM       *Form;
 512   FORM_BROWSER_STATEMENT  *Statement;
 513
 514   //
 515   // Whether the Form is editable
 516   //
 517   BOOLEAN                 FormEditable;
 518
 519   FORM_ENTRY_INFO            *CurrentMenu;
 520 } UI_MENU_SELECTION;
 521
 522 #define BROWSER_CONTEXT_SIGNATURE  SIGNATURE_32 ('B', 'C', 'T', 'X')
 523
 524 typedef struct {
 525   UINTN                 Signature;
 526   LIST_ENTRY            Link;
 527
 528   //
 529   // Globals defined in Setup.c
 530   //
 531   BOOLEAN                  FlagReconnect;
 532   BOOLEAN                  CallbackReconnect;
 533   BOOLEAN                  ResetRequired;
 534   BOOLEAN                  ExitRequired;
 535   EFI_HII_HANDLE           HiiHandle;
 536   EFI_GUID                 FormSetGuid;
 537   EFI_FORM_ID              FormId;
 538   UI_MENU_SELECTION        *Selection;
 539
 540   LIST_ENTRY           FormHistoryList;
 541 } BROWSER_CONTEXT;
 542
 543 #define BROWSER_CONTEXT_FROM_LINK(a)  CR (a, BROWSER_CONTEXT, Link, BROWSER_CONTEXT_SIGNATURE)
 544
 545 //
 546 // Scope for get defaut value. It may be GetDefaultForNoStorage, GetDefaultForStorage or GetDefaultForAll.
 547 //
 548 typedef enum {
 549   GetDefaultForNoStorage,       // Get default value for question which not has storage.
 550   GetDefaultForStorage,         // Get default value for question which has storage.
 551   GetDefaultForAll,             // Get default value for all questions.
 552   GetDefaultForMax              // Invalid value.
 553 } BROWSER_GET_DEFAULT_VALUE;
 554
 555 //
 556 // Get/set question value from/to.
 557 //
 558 typedef enum {
 559   GetSetValueWithEditBuffer = 0,   // Get/Set question value from/to editbuffer in the storage.
 560   GetSetValueWithBuffer,           // Get/Set question value from/to buffer in the storage.
 561   GetSetValueWithHiiDriver,        // Get/Set question value from/to hii driver.
 562   GetSetValueWithBothBuffer,       // Compare the editbuffer with buffer for this question, not use the question value.
 563   GetSetValueWithMax               // Invalid value.
 564 } GET_SET_QUESTION_VALUE_WITH;
 565
 566 extern EFI_HII_DATABASE_PROTOCOL         *mHiiDatabase;
 567 extern EFI_HII_CONFIG_ROUTING_PROTOCOL   *mHiiConfigRouting;
 568 extern EFI_DEVICE_PATH_FROM_TEXT_PROTOCOL *mPathFromText;
 569 extern EDKII_FORM_DISPLAY_ENGINE_PROTOCOL *mFormDisplay;
 570
 571 extern BOOLEAN               gCallbackReconnect;
 572 extern BOOLEAN               gFlagReconnect;
 573 extern BOOLEAN               gResetRequired;
 574 extern BOOLEAN               gExitRequired;
 575 extern LIST_ENTRY            gBrowserFormSetList;
 576 extern LIST_ENTRY            gBrowserHotKeyList;
 577 extern BROWSER_SETTING_SCOPE gBrowserSettingScope;
 578 extern EXIT_HANDLER          ExitHandlerFunction;
 579 extern EFI_HII_HANDLE        mCurrentHiiHandle;
 580 extern SETUP_DRIVER_PRIVATE_DATA mPrivateData;
 581 //
 582 // Browser Global Strings
 583 //
 584 extern CHAR16            *gEmptyString;
 585
 586 extern EFI_GUID          gZeroGuid;
 587
 588 extern UI_MENU_SELECTION  *gCurrentSelection;
 589
 590 //
 591 // Global Procedure Defines
 592 //
 593 #include "Expression.h"
 594
 595 /**
 596   Initialize the HII String Token to the correct values.
 597
 598 **/
 599 VOID
 600 InitializeBrowserStrings (
 601   VOID
 602   );
 603
 604 /**
 605   Parse opcodes in the formset IFR binary.
 606
 607   @param  FormSet                Pointer of the FormSet data structure.
 608
 609   @retval EFI_SUCCESS            Opcode parse success.
 610   @retval Other                  Opcode parse fail.
 611
 612 **/
 613 EFI_STATUS
 614 ParseOpCodes (
 615   IN FORM_BROWSER_FORMSET              *FormSet
 616   );
 617
 618 /**
 619   Free resources allocated for a FormSet.
 620
 621   @param  FormSet                Pointer of the FormSet
 622
 623 **/
 624 VOID
 625 DestroyFormSet (
 626   IN OUT FORM_BROWSER_FORMSET  *FormSet
 627   );
 628
 629
 630 /**
 631   Create a new string in HII Package List.
 632
 633   @param  String                 The String to be added
 634   @param  HiiHandle              The package list in the HII database to insert the
 635                                  specified string.
 636
 637   @return The output string.
 638
 639 **/
 640 EFI_STRING_ID
 641 NewString (
 642   IN  CHAR16                   *String,
 643   IN  EFI_HII_HANDLE           HiiHandle
 644   );
 645
 646 /**
 647   Delete a string from HII Package List.
 648
 649   @param  StringId               Id of the string in HII database.
 650   @param  HiiHandle              The HII package list handle.
 651
 652   @retval EFI_SUCCESS            The string was deleted successfully.
 653
 654 **/
 655 EFI_STATUS
 656 DeleteString (
 657   IN  EFI_STRING_ID            StringId,
 658   IN  EFI_HII_HANDLE           HiiHandle
 659   );
 660
 661 /**
 662   Get the string based on the StringId and HII Package List Handle.
 663
 664   @param  Token                  The String's ID.
 665   @param  HiiHandle              The package list in the HII database to search for
 666                                  the specified string.
 667
 668   @return The output string.
 669
 670 **/
 671 CHAR16 *
 672 GetToken (
 673   IN  EFI_STRING_ID                Token,
 674   IN  EFI_HII_HANDLE               HiiHandle
 675   );
 676
 677 /**
 678   Get Value for given Name from a NameValue Storage.
 679
 680   @param  Storage                The NameValue Storage.
 681   @param  Name                   The Name.
 682   @param  Value                  The retured Value.
 683   @param  GetValueFrom           Where to get source value, from EditValue or Value.
 684
 685   @retval EFI_SUCCESS            Value found for given Name.
 686   @retval EFI_NOT_FOUND          No such Name found in NameValue storage.
 687
 688 **/
 689 EFI_STATUS
 690 GetValueByName (
 691   IN BROWSER_STORAGE             *Storage,
 692   IN CHAR16                      *Name,
 693   IN OUT CHAR16                  **Value,
 694   IN GET_SET_QUESTION_VALUE_WITH GetValueFrom
 695   );
 696
 697 /**
 698   Set Value of given Name in a NameValue Storage.
 699
 700   @param  Storage                The NameValue Storage.
 701   @param  Name                   The Name.
 702   @param  Value                  The Value to set.
 703   @param  SetValueTo             Whether update editValue or Value.
 704   @param  ReturnNode             The node use the input name.
 705
 706   @retval EFI_SUCCESS            Value found for given Name.
 707   @retval EFI_NOT_FOUND          No such Name found in NameValue storage.
 708
 709 **/
 710 EFI_STATUS
 711 SetValueByName (
 712   IN  BROWSER_STORAGE             *Storage,
 713   IN  CHAR16                      *Name,
 714   IN  CHAR16                      *Value,
 715   IN  GET_SET_QUESTION_VALUE_WITH SetValueTo,
 716   OUT NAME_VALUE_NODE             **ReturnNode
 717   );
 718
 719 /**
 720   Validate whether this question's value has changed.
 721
 722   @param  FormSet                FormSet data structure.
 723   @param  Form                   Form data structure.
 724   @param  Question               Question to be initialized.
 725   @param  GetValueFrom           Where to get value, may from editbuffer, buffer or hii driver.
 726
 727   @retval TRUE                   Question's value has changed.
 728   @retval FALSE                  Question's value has not changed
 729
 730 **/
 731 BOOLEAN
 732 IsQuestionValueChanged (
 733   IN FORM_BROWSER_FORMSET             *FormSet,
 734   IN FORM_BROWSER_FORM                *Form,
 735   IN OUT FORM_BROWSER_STATEMENT       *Question,
 736   IN GET_SET_QUESTION_VALUE_WITH      GetValueFrom
 737   );
 738
 739 /**
 740   Validate the FormSet. If the formset is not validate, remove it from the list.
 741
 742   @param  FormSet                The input FormSet which need to validate.
 743
 744   @retval TRUE                   The handle is validate.
 745   @retval FALSE                  The handle is invalidate.
 746
 747 **/
 748 BOOLEAN
 749 ValidateFormSet (
 750   FORM_BROWSER_FORMSET    *FormSet
 751   );
 752
 753 /**
 754   Update the ValueChanged status for questions.
 755
 756   @param  FormSet                FormSet data structure.
 757   @param  Form                   Form data structure.
 758   @param  SettingScope           Setting Scope for Default action.
 759
 760 **/
 761 VOID
 762 UpdateStatementStatus (
 763   IN FORM_BROWSER_FORMSET             *FormSet,
 764   IN FORM_BROWSER_FORM                *Form,
 765   IN BROWSER_SETTING_SCOPE            SettingScope
 766   );
 767
 768 /**
 769   Get Question's current Value.
 770
 771   @param  FormSet                FormSet data structure.
 772   @param  Form                   Form data structure.
 773   @param  Question               Question to be initialized.
 774   @param  GetValueFrom           Where to get value, may from editbuffer, buffer or hii driver.
 775
 776   @retval EFI_SUCCESS            The function completed successfully.
 777
 778 **/
 779 EFI_STATUS
 780 GetQuestionValue (
 781   IN FORM_BROWSER_FORMSET             *FormSet,
 782   IN FORM_BROWSER_FORM                *Form,
 783   IN OUT FORM_BROWSER_STATEMENT       *Question,
 784   IN GET_SET_QUESTION_VALUE_WITH      GetValueFrom
 785   );
 786
 787 /**
 788   Save Question Value to edit copy(cached) or Storage(uncached).
 789
 790   @param  FormSet                FormSet data structure.
 791   @param  Form                   Form data structure.
 792   @param  Question               Pointer to the Question.
 793   @param  SetValueTo             Update the question value to editbuffer , buffer or hii driver.
 794
 795   @retval EFI_SUCCESS            The function completed successfully.
 796
 797 **/
 798 EFI_STATUS
 799 SetQuestionValue (
 800   IN FORM_BROWSER_FORMSET             *FormSet,
 801   IN FORM_BROWSER_FORM                *Form,
 802   IN OUT FORM_BROWSER_STATEMENT       *Question,
 803   IN GET_SET_QUESTION_VALUE_WITH      SetValueTo
 804   );
 805
 806 /**
 807   Perform inconsistent check for a Form.
 808
 809   @param  FormSet                FormSet data structure.
 810   @param  Form                   Form data structure.
 811   @param  Question               The Question to be validated.
 812   @param  Type                   Validation type: InConsistent or NoSubmit
 813
 814   @retval EFI_SUCCESS            Form validation pass.
 815   @retval other                  Form validation failed.
 816
 817 **/
 818 EFI_STATUS
 819 ValidateQuestion (
 820   IN  FORM_BROWSER_FORMSET            *FormSet,
 821   IN  FORM_BROWSER_FORM               *Form,
 822   IN  FORM_BROWSER_STATEMENT          *Question,
 823   IN  UINTN                           Type
 824   );
 825
 826
 827 /**
 828   Discard data based on the input setting scope (Form, FormSet or System).
 829
 830   @param  FormSet                FormSet data structure.
 831   @param  Form                   Form data structure.
 832   @param  SettingScope           Setting Scope for Discard action.
 833
 834   @retval EFI_SUCCESS            The function completed successfully.
 835   @retval EFI_UNSUPPORTED        Unsupport SettingScope.
 836
 837 **/
 838 EFI_STATUS
 839 DiscardForm (
 840   IN FORM_BROWSER_FORMSET             *FormSet,
 841   IN FORM_BROWSER_FORM                *Form,
 842   IN BROWSER_SETTING_SCOPE            SettingScope
 843   );
 844
 845 /**
 846   Submit data based on the input Setting level (Form, FormSet or System).
 847
 848   @param  FormSet                FormSet data structure.
 849   @param  Form                   Form data structure.
 850   @param  SettingScope           Setting Scope for Submit action.
 851
 852   @retval EFI_SUCCESS            The function completed successfully.
 853   @retval EFI_UNSUPPORTED        Unsupport SettingScope.
 854
 855 **/
 856 EFI_STATUS
 857 SubmitForm (
 858   IN FORM_BROWSER_FORMSET             *FormSet,
 859   IN FORM_BROWSER_FORM                *Form,
 860   IN BROWSER_SETTING_SCOPE            SettingScope
 861   );
 862
 863 /**
 864   Reset Question to its default value.
 865
 866   @param  FormSet                The form set.
 867   @param  Form                   The form.
 868   @param  Question               The question.
 869   @param  DefaultId              The Class of the default.
 870
 871   @retval EFI_SUCCESS            Question is reset to default value.
 872
 873 **/
 874 EFI_STATUS
 875 GetQuestionDefault (
 876   IN FORM_BROWSER_FORMSET             *FormSet,
 877   IN FORM_BROWSER_FORM                *Form,
 878   IN FORM_BROWSER_STATEMENT           *Question,
 879   IN UINT16                           DefaultId
 880   );
 881
 882 /**
 883   Get current setting of Questions.
 884
 885   @param  FormSet                FormSet data structure.
 886
 887 **/
 888 VOID
 889 InitializeCurrentSetting (
 890   IN OUT FORM_BROWSER_FORMSET             *FormSet
 891   );
 892
 893 /**
 894   Initialize the internal data structure of a FormSet.
 895
 896   @param  Handle                 PackageList Handle
 897   @param  FormSetGuid            GUID of a formset. If not specified (NULL or zero
 898                                  GUID), take the first FormSet found in package
 899                                  list.
 900   @param  FormSet                FormSet data structure.
 901
 902   @retval EFI_SUCCESS            The function completed successfully.
 903   @retval EFI_NOT_FOUND          The specified FormSet could not be found.
 904
 905 **/
 906 EFI_STATUS
 907 InitializeFormSet (
 908   IN  EFI_HII_HANDLE                   Handle,
 909   IN OUT EFI_GUID                      *FormSetGuid,
 910   OUT FORM_BROWSER_FORMSET             *FormSet
 911   );
 912
 913 /**
 914   Reset Questions to their initial value or default value in a Form, Formset or System.
 915
 916   GetDefaultValueScope parameter decides which questions will reset
 917   to its default value.
 918
 919   @param  FormSet                FormSet data structure.
 920   @param  Form                   Form data structure.
 921   @param  DefaultId              The Class of the default.
 922   @param  SettingScope           Setting Scope for Default action.
 923   @param  GetDefaultValueScope   Get default value scope.
 924   @param  Storage                Get default value only for this storage.
 925   @param  RetrieveValueFirst     Whether call the retrieve call back to
 926                                  get the initial value before get default
 927                                  value.
 928   @param  SkipGetAltCfg          Whether skip the get altcfg string process.
 929
 930   @retval EFI_SUCCESS            The function completed successfully.
 931   @retval EFI_UNSUPPORTED        Unsupport SettingScope.
 932
 933 **/
 934 EFI_STATUS
 935 ExtractDefault (
 936   IN FORM_BROWSER_FORMSET             *FormSet,
 937   IN FORM_BROWSER_FORM                *Form,
 938   IN UINT16                           DefaultId,
 939   IN BROWSER_SETTING_SCOPE            SettingScope,
 940   IN BROWSER_GET_DEFAULT_VALUE        GetDefaultValueScope,
 941   IN BROWSER_STORAGE                  *Storage,
 942   IN BOOLEAN                          RetrieveValueFirst,
 943   IN BOOLEAN                          SkipGetAltCfg
 944   );
 945
 946 /**
 947   Initialize Question's Edit copy from Storage.
 948
 949   @param  Selection              Selection contains the information about
 950                                  the Selection, form and formset to be displayed.
 951                                  Selection action may be updated in retrieve callback.
 952                                  If Selection is NULL, only initialize Question value.
 953   @param  FormSet                FormSet data structure.
 954   @param  Form                   Form data structure.
 955
 956   @retval EFI_SUCCESS            The function completed successfully.
 957
 958 **/
 959 EFI_STATUS
 960 LoadFormConfig (
 961   IN OUT UI_MENU_SELECTION    *Selection,
 962   IN FORM_BROWSER_FORMSET     *FormSet,
 963   IN FORM_BROWSER_FORM        *Form
 964   );
 965
 966 /**
 967   Initialize Question's Edit copy from Storage for the whole Formset.
 968
 969   @param  Selection              Selection contains the information about
 970                                  the Selection, form and formset to be displayed.
 971                                  Selection action may be updated in retrieve callback.
 972                                  If Selection is NULL, only initialize Question value.
 973   @param  FormSet                FormSet data structure.
 974
 975   @retval EFI_SUCCESS            The function completed successfully.
 976
 977 **/
 978 EFI_STATUS
 979 LoadFormSetConfig (
 980   IN OUT UI_MENU_SELECTION    *Selection,
 981   IN     FORM_BROWSER_FORMSET *FormSet
 982   );
 983
 984 /**
 985   Convert setting of Buffer Storage or NameValue Storage to <ConfigResp>.
 986
 987   @param  Storage                The Storage to be conveted.
 988   @param  ConfigResp             The returned <ConfigResp>.
 989   @param  ConfigRequest          The ConfigRequest string.
 990   @param  GetEditBuf             Get the data from editbuffer or buffer.
 991
 992   @retval EFI_SUCCESS            Convert success.
 993   @retval EFI_INVALID_PARAMETER  Incorrect storage type.
 994
 995 **/
 996 EFI_STATUS
 997 StorageToConfigResp (
 998   IN BROWSER_STORAGE         *Storage,
 999   IN CHAR16                  **ConfigResp,
1000   IN CHAR16                  *ConfigRequest,
1001   IN BOOLEAN                 GetEditBuf
1002   );
1003
1004 /**
1005   Convert <ConfigResp> to settings in Buffer Storage or NameValue Storage.
1006
1007   @param  Storage                The Storage to receive the settings.
1008   @param  ConfigResp             The <ConfigResp> to be converted.
1009
1010   @retval EFI_SUCCESS            Convert success.
1011   @retval EFI_INVALID_PARAMETER  Incorrect storage type.
1012
1013 **/
1014 EFI_STATUS
1015 ConfigRespToStorage (
1016   IN BROWSER_STORAGE         *Storage,
1017   IN CHAR16                  *ConfigResp
1018   );
1019
1020 /**
1021   Fill storage's edit copy with settings requested from Configuration Driver.
1022
1023   @param  FormSet                FormSet data structure.
1024   @param  Storage                Buffer Storage.
1025
1026 **/
1027 VOID
1028 LoadStorage (
1029   IN FORM_BROWSER_FORMSET    *FormSet,
1030   IN FORMSET_STORAGE         *Storage
1031   );
1032
1033 /**
1034   Fetch the Ifr binary data of a FormSet.
1035
1036   @param  Handle                 PackageList Handle
1037   @param  FormSetGuid            GUID of a formset. If not specified (NULL or zero
1038                                  GUID), take the first FormSet found in package
1039                                  list.
1040   @param  BinaryLength           The length of the FormSet IFR binary.
1041   @param  BinaryData             The buffer designed to receive the FormSet.
1042
1043   @retval EFI_SUCCESS            Buffer filled with the requested FormSet.
1044                                  BufferLength was updated.
1045   @retval EFI_INVALID_PARAMETER  The handle is unknown.
1046   @retval EFI_NOT_FOUND          A form or FormSet on the requested handle cannot
1047                                  be found with the requested FormId.
1048
1049 **/
1050 EFI_STATUS
1051 GetIfrBinaryData (
1052   IN  EFI_HII_HANDLE   Handle,
1053   IN OUT EFI_GUID      *FormSetGuid,
1054   OUT UINTN            *BinaryLength,
1055   OUT UINT8            **BinaryData
1056   );
1057
1058 /**
1059   Save globals used by previous call to SendForm(). SendForm() may be called from
1060   HiiConfigAccess.Callback(), this will cause SendForm() be reentried.
1061   So, save globals of previous call to SendForm() and restore them upon exit.
1062
1063 **/
1064 VOID
1065 SaveBrowserContext (
1066   VOID
1067   );
1068
1069 /**
1070   Restore globals used by previous call to SendForm().
1071
1072 **/
1073 VOID
1074 RestoreBrowserContext (
1075   VOID
1076   );
1077
1078 /**
1079   This is the routine which an external caller uses to direct the browser
1080   where to obtain it's information.
1081
1082
1083   @param This            The Form Browser protocol instanse.
1084   @param Handles         A pointer to an array of Handles.  If HandleCount > 1 we
1085                          display a list of the formsets for the handles specified.
1086   @param HandleCount     The number of Handles specified in Handle.
1087   @param FormSetGuid     This field points to the EFI_GUID which must match the Guid
1088                          field in the EFI_IFR_FORM_SET op-code for the specified
1089                          forms-based package. If FormSetGuid is NULL, then this
1090                          function will display the first found forms package.
1091   @param FormId          This field specifies which EFI_IFR_FORM to render as the first
1092                          displayable page. If this field has a value of 0x0000, then
1093                          the forms browser will render the specified forms in their encoded order.
1094                          ScreenDimenions - This allows the browser to be called so that it occupies a
1095                          portion of the physical screen instead of dynamically determining the screen dimensions.
1096                          ActionRequest   - Points to the action recommended by the form.
1097   @param ScreenDimensions Points to recommended form dimensions, including any non-content area, in
1098                           characters.
1099   @param ActionRequest       Points to the action recommended by the form.
1100
1101   @retval  EFI_SUCCESS            The function completed successfully.
1102   @retval  EFI_INVALID_PARAMETER  One of the parameters has an invalid value.
1103   @retval  EFI_NOT_FOUND          No valid forms could be found to display.
1104
1105 **/
1106 EFI_STATUS
1107 EFIAPI
1108 SendForm (
1109   IN  CONST EFI_FORM_BROWSER2_PROTOCOL *This,
1110   IN  EFI_HII_HANDLE                   *Handles,
1111   IN  UINTN                            HandleCount,
1112   IN  EFI_GUID                         *FormSetGuid, OPTIONAL
1113   IN  UINT16                           FormId, OPTIONAL
1114   IN  CONST EFI_SCREEN_DESCRIPTOR      *ScreenDimensions, OPTIONAL
1115   OUT EFI_BROWSER_ACTION_REQUEST       *ActionRequest  OPTIONAL
1116   );
1117
1118 /**
1119   This function is called by a callback handler to retrieve uncommitted state
1120   data from the browser.
1121
1122   @param  This                   A pointer to the EFI_FORM_BROWSER2_PROTOCOL
1123                                  instance.
1124   @param  ResultsDataSize        A pointer to the size of the buffer associated
1125                                  with ResultsData.
1126   @param  ResultsData            A string returned from an IFR browser or
1127                                  equivalent. The results string will have no
1128                                  routing information in them.
1129   @param  RetrieveData           A BOOLEAN field which allows an agent to retrieve
1130                                  (if RetrieveData = TRUE) data from the uncommitted
1131                                  browser state information or set (if RetrieveData
1132                                  = FALSE) data in the uncommitted browser state
1133                                  information.
1134   @param  VariableGuid           An optional field to indicate the target variable
1135                                  GUID name to use.
1136   @param  VariableName           An optional field to indicate the target
1137                                  human-readable variable name.
1138
1139   @retval EFI_SUCCESS            The results have been distributed or are awaiting
1140                                  distribution.
1141   @retval EFI_BUFFER_TOO_SMALL   The ResultsDataSize specified was too small to
1142                                  contain the results data.
1143
1144 **/
1145 EFI_STATUS
1146 EFIAPI
1147 BrowserCallback (
1148   IN CONST EFI_FORM_BROWSER2_PROTOCOL  *This,
1149   IN OUT UINTN                         *ResultsDataSize,
1150   IN OUT EFI_STRING                    ResultsData,
1151   IN BOOLEAN                           RetrieveData,
1152   IN CONST EFI_GUID                    *VariableGuid, OPTIONAL
1153   IN CONST CHAR16                      *VariableName  OPTIONAL
1154   );
1155
1156 /**
1157   Find menu which will show next time.
1158
1159   @param Selection       On input, Selection tell setup browser the information
1160                          about the Selection, form and formset to be displayed.
1161                          On output, Selection return the screen item that is selected
1162                          by user.
1163   @param SettingLevel    Input Settting level, if it is FormLevel, just exit current form.
1164                          else, we need to exit current formset.
1165
1166   @retval TRUE           Exit current form.
1167   @retval FALSE          User press ESC and keep in current form.
1168 **/
1169 BOOLEAN
1170 FindNextMenu (
1171   IN OUT UI_MENU_SELECTION        *Selection,
1172   IN       BROWSER_SETTING_SCOPE  SettingLevel
1173   );
1174
1175 /**
1176   check whether the form need to update the NV.
1177
1178   @param  Form                Form data structure.
1179
1180   @retval TRUE                   Need to update the NV.
1181   @retval FALSE                  No need to update the NV.
1182 **/
1183 BOOLEAN
1184 IsNvUpdateRequiredForForm (
1185   IN FORM_BROWSER_FORM    *Form
1186   );
1187
1188 /**
1189   check whether the formset need to update the NV.
1190
1191   @param  FormSet                FormSet data structure.
1192
1193   @retval TRUE                   Need to update the NV.
1194   @retval FALSE                  No need to update the NV.
1195 **/
1196 BOOLEAN
1197 IsNvUpdateRequiredForFormSet (
1198   IN FORM_BROWSER_FORMSET  *FormSet
1199   );
1200
1201 /**
1202   Call the call back function for the question and process the return action.
1203
1204   @param Selection             On input, Selection tell setup browser the information
1205                                about the Selection, form and formset to be displayed.
1206                                On output, Selection return the screen item that is selected
1207                                by user.
1208   @param FormSet               The formset this question belong to.
1209   @param Form                  The form this question belong to.
1210   @param Question              The Question which need to call.
1211   @param Action                The action request.
1212   @param SkipSaveOrDiscard     Whether skip save or discard action.
1213
1214   @retval EFI_SUCCESS          The call back function excutes successfully.
1215   @return Other value if the call back function failed to excute.
1216 **/
1217 EFI_STATUS
1218 ProcessCallBackFunction (
1219   IN OUT UI_MENU_SELECTION               *Selection,
1220   IN     FORM_BROWSER_FORMSET            *FormSet,
1221   IN     FORM_BROWSER_FORM               *Form,
1222   IN     FORM_BROWSER_STATEMENT          *Question,
1223   IN     EFI_BROWSER_ACTION              Action,
1224   IN     BOOLEAN                         SkipSaveOrDiscard
1225   );
1226
1227 /**
1228   Call the retrieve type call back function for one question to get the initialize data.
1229
1230   This function only used when in the initialize stage, because in this stage, the
1231   Selection->Form is not ready. For other case, use the ProcessCallBackFunction instead.
1232
1233   @param ConfigAccess          The config access protocol produced by the hii driver.
1234   @param Statement             The Question which need to call.
1235   @param FormSet               The formset this question belong to.
1236
1237   @retval EFI_SUCCESS          The call back function excutes successfully.
1238   @return Other value if the call back function failed to excute.
1239 **/
1240 EFI_STATUS
1241 ProcessRetrieveForQuestion (
1242   IN     EFI_HII_CONFIG_ACCESS_PROTOCOL  *ConfigAccess,
1243   IN     FORM_BROWSER_STATEMENT          *Statement,
1244   IN     FORM_BROWSER_FORMSET            *FormSet
1245   );
1246
1247 /**
1248   Find the matched FormSet context in the backup maintain list based on HiiHandle.
1249
1250   @param Handle  The Hii Handle.
1251
1252   @return the found FormSet context. If no found, NULL will return.
1253
1254 **/
1255 FORM_BROWSER_FORMSET *
1256 GetFormSetFromHiiHandle (
1257   EFI_HII_HANDLE Handle
1258   );
1259
1260 /**
1261   Check whether the input HII handle is the FormSet that is being used.
1262
1263   @param Handle  The Hii Handle.
1264
1265   @retval TRUE   HII handle is being used.
1266   @retval FALSE  HII handle is not being used.
1267
1268 **/
1269 BOOLEAN
1270 IsHiiHandleInBrowserContext (
1271   EFI_HII_HANDLE Handle
1272   );
1273
1274 /**
1275   Configure what scope the hot key will impact.
1276   All hot keys have the same scope. The mixed hot keys with the different level are not supported.
1277   If no scope is set, the default scope will be FormSet level.
1278   After all registered hot keys are removed, previous Scope can reset to another level.
1279
1280   @param[in] Scope               Scope level to be set.
1281
1282   @retval EFI_SUCCESS            Scope is set correctly.
1283   @retval EFI_INVALID_PARAMETER  Scope is not the valid value specified in BROWSER_SETTING_SCOPE.
1284   @retval EFI_UNSPPORTED         Scope level is different from current one that the registered hot keys have.
1285
1286 **/
1287 EFI_STATUS
1288 EFIAPI
1289 SetScope (
1290   IN BROWSER_SETTING_SCOPE Scope
1291   );
1292
1293 /**
1294   Register the hot key with its browser action, or unregistered the hot key.
1295   Only support hot key that is not printable character (control key, function key, etc.).
1296   If the action value is zero, the hot key will be unregistered if it has been registered.
1297   If the same hot key has been registered, the new action and help string will override the previous ones.
1298
1299   @param[in] KeyData     A pointer to a buffer that describes the keystroke
1300                          information for the hot key. Its type is EFI_INPUT_KEY to
1301                          be supported by all ConsoleIn devices.
1302   @param[in] Action      Action value that describes what action will be trigged when the hot key is pressed.
1303   @param[in] DefaultId   Specifies the type of defaults to retrieve, which is only for DEFAULT action.
1304   @param[in] HelpString  Help string that describes the hot key information.
1305                          Its value may be NULL for the unregistered hot key.
1306
1307   @retval EFI_SUCCESS            Hot key is registered or unregistered.
1308   @retval EFI_INVALID_PARAMETER  KeyData is NULL.
1309   @retval EFI_NOT_FOUND          KeyData is not found to be unregistered.
1310   @retval EFI_UNSUPPORTED        Key represents a printable character. It is conflicted with Browser.
1311 **/
1312 EFI_STATUS
1313 EFIAPI
1314 RegisterHotKey (
1315   IN EFI_INPUT_KEY *KeyData,
1316   IN UINT32        Action,
1317   IN UINT16        DefaultId,
1318   IN EFI_STRING    HelpString OPTIONAL
1319   );
1320
1321 /**
1322   Register Exit handler function.
1323   When more than one handler function is registered, the latter one will override the previous one.
1324   When NULL handler is specified, the previous Exit handler will be unregistered.
1325
1326   @param[in] Handler      Pointer to handler function.
1327
1328 **/
1329 VOID
1330 EFIAPI
1331 RegiserExitHandler (
1332   IN EXIT_HANDLER Handler
1333   );
1334
1335 /**
1336
1337   Check whether the browser data has been modified.
1338
1339   @retval TRUE        Browser data is changed.
1340   @retval FALSE       No browser data is changed.
1341
1342 **/
1343 BOOLEAN
1344 EFIAPI
1345 IsBrowserDataModified (
1346   VOID
1347   );
1348
1349 /**
1350
1351   Execute the action requested by the Action parameter.
1352
1353   @param[in] Action     Execute the request action.
1354   @param[in] DefaultId  The default Id info when need to load default value.
1355
1356   @retval EFI_SUCCESS              Execute the request action succss.
1357   @retval EFI_INVALID_PARAMETER    The input action value is invalid.
1358
1359 **/
1360 EFI_STATUS
1361 EFIAPI
1362 ExecuteAction (
1363   IN UINT32        Action,
1364   IN UINT16        DefaultId
1365   );
1366
1367 /**
1368   Create reminder to let user to choose save or discard the changed browser data.
1369   Caller can use it to actively check the changed browser data.
1370
1371   @retval BROWSER_NO_CHANGES       No browser data is changed.
1372   @retval BROWSER_SAVE_CHANGES     The changed browser data is saved.
1373   @retval BROWSER_DISCARD_CHANGES  The changed browser data is discard.
1374   @retval BROWSER_KEEP_CURRENT     Browser keep current changes.
1375
1376 **/
1377 UINT32
1378 EFIAPI
1379 SaveReminder (
1380   VOID
1381   );
1382
1383 /**
1384   Check whether the Reset Required for the browser
1385
1386   @retval TRUE      Browser required to reset after exit.
1387   @retval FALSE     Browser not need to reset after exit.
1388
1389 **/
1390 BOOLEAN
1391 EFIAPI
1392 IsResetRequired (
1393   VOID
1394   );
1395
1396 /**
1397   Find the registered HotKey based on KeyData.
1398
1399   @param[in] KeyData     A pointer to a buffer that describes the keystroke
1400                          information for the hot key.
1401
1402   @return The registered HotKey context. If no found, NULL will return.
1403 **/
1404 BROWSER_HOT_KEY *
1405 GetHotKeyFromRegisterList (
1406   IN EFI_INPUT_KEY *KeyData
1407   );
1408
1409 /**
1410
1411   Get FORM_BROWSER_STATEMENT from FORM_DISPLAY_ENGINE_STATEMENT based on the OpCode info.
1412
1413   @param DisplayStatement        The input FORM_DISPLAY_ENGINE_STATEMENT.
1414
1415   @retval FORM_BROWSER_STATEMENT  The return FORM_BROWSER_STATEMENT info.
1416
1417 **/
1418 FORM_BROWSER_STATEMENT *
1419 GetBrowserStatement (
1420   IN FORM_DISPLAY_ENGINE_STATEMENT *DisplayStatement
1421   );
1422
1423 /**
1424   Password may be stored as encrypted by Configuration Driver. When change a
1425   password, user will be challenged with old password. To validate user input old
1426   password, we will send the clear text to Configuration Driver via Callback().
1427   Configuration driver is responsible to check the passed in password and return
1428   the validation result. If validation pass, state machine in password Callback()
1429   will transit from BROWSER_STATE_VALIDATE_PASSWORD to BROWSER_STATE_SET_PASSWORD.
1430   After user type in new password twice, Callback() will be invoked to send the
1431   new password to Configuration Driver.
1432
1433   @param  Selection              Pointer to UI_MENU_SELECTION.
1434   @param  MenuOption             The MenuOption for this password Question.
1435   @param  String                 The clear text of password.
1436
1437   @retval EFI_NOT_AVAILABLE_YET  Callback() request to terminate password input.
1438   @return In state of BROWSER_STATE_VALIDATE_PASSWORD:
1439   @retval EFI_SUCCESS            Password correct, Browser will prompt for new
1440                                  password.
1441   @retval EFI_NOT_READY          Password incorrect, Browser will show error
1442                                  message.
1443   @retval Other                  Browser will do nothing.
1444   @return In state of BROWSER_STATE_SET_PASSWORD:
1445   @retval EFI_SUCCESS            Set password success.
1446   @retval Other                  Set password failed.
1447
1448 **/
1449 EFI_STATUS
1450 PasswordCallback (
1451   IN  UI_MENU_SELECTION           *Selection,
1452   IN  FORM_BROWSER_STATEMENT      *Question,
1453   IN  CHAR16                      *String
1454   );
1455
1456 /**
1457   Display error message for invalid password.
1458
1459 **/
1460 VOID
1461 PasswordInvalid (
1462   VOID
1463   );
1464
1465 /**
1466   The worker function that send the displays to the screen. On output,
1467   the selection made by user is returned.
1468
1469   @param Selection       On input, Selection tell setup browser the information
1470                          about the Selection, form and formset to be displayed.
1471                          On output, Selection return the screen item that is selected
1472                          by user.
1473
1474   @retval EFI_SUCCESS    The page is displayed successfully.
1475   @return Other value if the page failed to be diplayed.
1476
1477 **/
1478 EFI_STATUS
1479 SetupBrowser (
1480   IN OUT UI_MENU_SELECTION    *Selection
1481   );
1482
1483 /**
1484   Free up the resource allocated for all strings required
1485   by Setup Browser.
1486
1487 **/
1488 VOID
1489 FreeBrowserStrings (
1490   VOID
1491   );
1492
1493 /**
1494   Create a menu with specified formset GUID and form ID, and add it as a child
1495   of the given parent menu.
1496
1497   @param  HiiHandle              Hii handle related to this formset.
1498   @param  FormSetGuid            The Formset Guid of menu to be added.
1499   @param  FormId                 The Form ID of menu to be added.
1500   @param  QuestionId             The question id of this menu to be added.
1501
1502   @return A pointer to the newly added menu or NULL if memory is insufficient.
1503
1504 **/
1505 FORM_ENTRY_INFO *
1506 UiAddMenuList (
1507   IN EFI_HII_HANDLE       HiiHandle,
1508   IN EFI_GUID             *FormSetGuid,
1509   IN UINT16               FormId,
1510   IN UINT16               QuestionId
1511   );
1512
1513 /**
1514   Search Menu with given FormSetGuid and FormId in all cached menu list.
1515
1516   @param  HiiHandle              HiiHandle for FormSet.
1517   @param  FormSetGuid            The Formset GUID of the menu to search.
1518   @param  FormId                 The Form ID of menu to search.
1519
1520   @return A pointer to menu found or NULL if not found.
1521
1522 **/
1523 FORM_ENTRY_INFO *
1524 UiFindMenuList (
1525   IN EFI_HII_HANDLE       HiiHandle,
1526   IN EFI_GUID             *FormSetGuid,
1527   IN UINT16               FormId
1528   );
1529
1530 /**
1531   Free Menu list linked list.
1532
1533   @param  MenuListHead    One Menu list point in the menu list.
1534
1535 **/
1536 VOID
1537 UiFreeMenuList (
1538   LIST_ENTRY   *MenuListHead
1539   );
1540
1541 /**
1542   Find parent menu for current menu.
1543
1544   @param  CurrentMenu    Current Menu
1545   @param  SettingLevel   Whether find parent menu in Form Level or Formset level.
1546                          In form level, just find the parent menu;
1547                          In formset level, find the parent menu which has different
1548                          formset guid value.
1549
1550   @retval   The parent menu for current menu.
1551 **/
1552 FORM_ENTRY_INFO *
1553 UiFindParentMenu (
1554   IN FORM_ENTRY_INFO          *CurrentMenu,
1555   IN BROWSER_SETTING_SCOPE    SettingLevel
1556   );
1557
1558 /**
1559   Validate the HiiHandle.
1560
1561   @param  HiiHandle              The input HiiHandle which need to validate.
1562
1563   @retval TRUE                   The handle is validate.
1564   @retval FALSE                  The handle is invalidate.
1565
1566 **/
1567 BOOLEAN
1568 ValidateHiiHandle (
1569   EFI_HII_HANDLE          HiiHandle
1570   );
1571
1572 /**
1573   Copy current Menu list to the new menu list.
1574
1575   @param  NewMenuListHead        New create Menu list.
1576   @param  CurrentMenuListHead    Current Menu list.
1577
1578 **/
1579 VOID
1580 UiCopyMenuList (
1581   OUT LIST_ENTRY   *NewMenuListHead,
1582   IN  LIST_ENTRY   *CurrentMenuListHead
1583   );
1584
1585 /**
1586   Search an Option of a Question by its value.
1587
1588   @param  Question               The Question
1589   @param  OptionValue            Value for Option to be searched.
1590
1591   @retval Pointer                Pointer to the found Option.
1592   @retval NULL                   Option not found.
1593
1594 **/
1595 QUESTION_OPTION *
1596 ValueToOption (
1597   IN FORM_BROWSER_STATEMENT   *Question,
1598   IN EFI_HII_VALUE            *OptionValue
1599   );
1600 /**
1601   Return data element in an Array by its Index.
1602
1603   @param  Array                  The data array.
1604   @param  Type                   Type of the data in this array.
1605   @param  Index                  Zero based index for data in this array.
1606
1607   @retval Value                  The data to be returned
1608
1609 **/
1610 UINT64
1611 GetArrayData (
1612   IN VOID                     *Array,
1613   IN UINT8                    Type,
1614   IN UINTN                    Index
1615   );
1616
1617 /**
1618   Set value of a data element in an Array by its Index.
1619
1620   @param  Array                  The data array.
1621   @param  Type                   Type of the data in this array.
1622   @param  Index                  Zero based index for data in this array.
1623   @param  Value                  The value to be set.
1624
1625 **/
1626 VOID
1627 SetArrayData (
1628   IN VOID                     *Array,
1629   IN UINT8                    Type,
1630   IN UINTN                    Index,
1631   IN UINT64                   Value
1632   );
1633
1634 /**
1635    Compare two Hii value.
1636
1637    @param  Value1                 Expression value to compare on left-hand.
1638    @param  Value2                 Expression value to compare on right-hand.
1639    @param  Result                 Return value after compare.
1640                                   retval 0                      Two operators equal.
1641                                   return Positive value if Value1 is greater than Value2.
1642                                   retval Negative value if Value1 is less than Value2.
1643    @param  HiiHandle              Only required for string compare.
1644
1645    @retval other                  Could not perform compare on two values.
1646    @retval EFI_SUCCESS            Compare the value success.
1647
1648 **/
1649 EFI_STATUS
1650 CompareHiiValue (
1651   IN  EFI_HII_VALUE   *Value1,
1652   IN  EFI_HII_VALUE   *Value2,
1653   OUT INTN            *Result,
1654   IN  EFI_HII_HANDLE  HiiHandle OPTIONAL
1655   );
1656
1657 /**
1658   Perform Password check.
1659   Passwork may be encrypted by driver that requires the specific check.
1660
1661   @param  Form             Form where Password Statement is in.
1662   @param  Statement        Password statement
1663   @param  PasswordString   Password string to be checked. It may be NULL.
1664                            NULL means to restore password.
1665                            "" string can be used to checked whether old password does exist.
1666
1667   @return Status     Status of Password check.
1668 **/
1669 EFI_STATUS
1670 EFIAPI
1671 PasswordCheck (
1672   IN FORM_DISPLAY_ENGINE_FORM      *Form,
1673   IN FORM_DISPLAY_ENGINE_STATEMENT *Statement,
1674   IN EFI_STRING                    PasswordString  OPTIONAL
1675   );
1676
1677 /**
1678
1679   Get FORM_BROWSER_STATEMENT from FORM_DISPLAY_ENGINE_STATEMENT based on the OpCode info.
1680
1681   @param DisplayStatement        The input FORM_DISPLAY_ENGINE_STATEMENT.
1682
1683   @retval FORM_BROWSER_STATEMENT  The return FORM_BROWSER_STATEMENT info.
1684
1685 **/
1686 FORM_BROWSER_STATEMENT *
1687 GetBrowserStatement (
1688   IN FORM_DISPLAY_ENGINE_STATEMENT *DisplayStatement
1689   );
1690
1691 /**
1692
1693   Initialize the Display form structure data.
1694
1695 **/
1696 VOID
1697 InitializeDisplayFormData (
1698   VOID
1699   );
1700
1701
1702 /**
1703   Base on the current formset info, clean the ConfigRequest string in browser storage.
1704
1705   @param  FormSet                Pointer of the FormSet
1706
1707 **/
1708 VOID
1709 CleanBrowserStorage (
1710   IN OUT FORM_BROWSER_FORMSET  *FormSet
1711   );
1712
1713 /**
1714   Find HII Handle in the HII database associated with given Device Path.
1715
1716   If DevicePath is NULL, then ASSERT.
1717
1718   @param  DevicePath             Device Path associated with the HII package list
1719                                  handle.
1720   @param  FormsetGuid            The formset guid for this formset.
1721
1722   @retval Handle                 HII package list Handle associated with the Device
1723                                         Path.
1724   @retval NULL                   Hii Package list handle is not found.
1725
1726 **/
1727 EFI_HII_HANDLE
1728 DevicePathToHiiHandle (
1729   IN EFI_DEVICE_PATH_PROTOCOL   *DevicePath,
1730   IN EFI_GUID                   *FormsetGuid
1731   );
1732
1733 /**
1734   Adjust the config request info, remove the request elements which already in AllConfigRequest string.
1735
1736   @param  Storage                Form set Storage.
1737   @param  Request                The input request string.
1738   @param  RespString             Whether the input is ConfigRequest or ConfigResp format.
1739
1740   @retval TRUE                   Has element not covered by current used elements, need to continue to call ExtractConfig
1741   @retval FALSE                  All elements covered by current used elements.
1742
1743 **/
1744 BOOLEAN
1745 ConfigRequestAdjust (
1746   IN  BROWSER_STORAGE         *Storage,
1747   IN  CHAR16                  *Request,
1748   IN  BOOLEAN                 RespString
1749   );
1750
1751 /**
1752   Perform question check.
1753
1754   If one question has more than one check, process form high priority to low.
1755
1756   @param  FormSet                FormSet data structure.
1757   @param  Form                   Form data structure.
1758   @param  Question               The Question to be validated.
1759
1760   @retval EFI_SUCCESS            Form validation pass.
1761   @retval other                  Form validation failed.
1762
1763 **/
1764 EFI_STATUS
1765 ValueChangedValidation (
1766   IN  FORM_BROWSER_FORMSET            *FormSet,
1767   IN  FORM_BROWSER_FORM               *Form,
1768   IN  FORM_BROWSER_STATEMENT          *Question
1769   );
1770
1771 /**
1772   Pop up the error info.
1773
1774   @param      BrowserStatus    The input browser status.
1775   @param      HiiHandle        The HiiHandle for this error opcode.
1776   @param      OpCode           The opcode use to get the erro info and timeout value.
1777   @param      ErrorString      Error string used by BROWSER_NO_SUBMIT_IF.
1778
1779 **/
1780 UINT32
1781 PopupErrorMessage (
1782   IN UINT32                BrowserStatus,
1783   IN EFI_HII_HANDLE        HiiHandle,
1784   IN EFI_IFR_OP_HEADER     *OpCode, OPTIONAL
1785   IN CHAR16                *ErrorString
1786   );
1787
1788 /**
1789   Check whether the result is TRUE or FALSE.
1790
1791   For the EFI_HII_VALUE value type is numeric, return TRUE if the
1792   value is not 0.
1793
1794   @param  Result             Input the result data.
1795
1796   @retval TRUE               The result is TRUE.
1797   @retval FALSE              The result is FALSE.
1798
1799 **/
1800 BOOLEAN
1801 IsTrue (
1802   IN EFI_HII_VALUE     *Result
1803   );
1804
1805 /**
1806   Get Formset_storage base on the input varstoreid info.
1807
1808   @param  FormSet                Pointer of the current FormSet.
1809   @param  VarStoreId             Varstore ID info.
1810
1811   @return Pointer to a FORMSET_STORAGE data structure.
1812
1813 **/
1814 FORMSET_STORAGE *
1815 GetFstStgFromVarId (
1816   IN FORM_BROWSER_FORMSET  *FormSet,
1817   IN EFI_VARSTORE_ID       VarStoreId
1818   );
1819
1820 /**
1821   Get Formset_storage base on the input browser storage.
1822
1823   More than one formsets may share the same browser storage,
1824   this function just get the first formset storage which
1825   share the browser storage.
1826
1827   @param  Storage              browser storage info.
1828
1829   @return Pointer to a FORMSET_STORAGE data structure.
1830
1831
1832 **/
1833 FORMSET_STORAGE *
1834 GetFstStgFromBrsStg (
1835   IN BROWSER_STORAGE       *Storage
1836   );
1837
1838 /**
1839   Reconnect the controller.
1840
1841   @param DriverHandle          The controller handle which need to be reconnect.
1842
1843   @retval   TRUE     do the reconnect behavior success.
1844   @retval   FALSE    do the reconnect behavior failed.
1845
1846 **/
1847 BOOLEAN
1848 ReconnectController (
1849   IN EFI_HANDLE   DriverHandle
1850   );
1851
1852 #endif