X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=MdePkg%2FInclude%2FLibrary%2FBaseLib.h;h=2b98af4cd17e574e1d9e66c8e743790367617e41;hp=791849b80406299c1a840418fbdffa081dbd4e50;hb=364a54742f569b7221f0022594ef3d8384a8517c;hpb=fb4dd857c1bfa0c625c75e754e2386f6698e8a43

diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index 791849b804..2b98af4cd1 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -2868,6 +2868,33 @@ PathCleanUpDirectories(
 #define INITIALIZE_LIST_HEAD_VARIABLE(ListHead)  {&(ListHead), &(ListHead)}
 
 
+/**
+  Checks whether FirstEntry and SecondEntry are part of the same doubly-linked
+  list.
+
+  If FirstEntry is NULL, then ASSERT().
+  If FirstEntry->ForwardLink is NULL, then ASSERT().
+  If FirstEntry->BackLink is NULL, then ASSERT().
+  If SecondEntry is NULL, then ASSERT();
+  If PcdMaximumLinkedListLength is not zero, and List contains more than
+  PcdMaximumLinkedListLength nodes, then ASSERT().
+
+  @param  FirstEntry   A pointer to a node in a linked list.
+  @param  SecondEntry  A pointer to the node to locate.
+
+  @retval TRUE   SecondEntry is in the same doubly-linked list as FirstEntry.
+  @retval FALSE  SecondEntry isn't in the same doubly-linked list as FirstEntry,
+                 or FirstEntry is invalid.
+
+**/
+BOOLEAN
+EFIAPI
+IsNodeInList (
+  IN      CONST LIST_ENTRY      *FirstEntry,
+  IN      CONST LIST_ENTRY      *SecondEntry
+  );
+
+
 /**
   Initializes the head node of a doubly linked list, and returns the pointer to
   the head node of the doubly linked list.
@@ -4802,6 +4829,25 @@ CalculateCheckSum64 (
   IN      UINTN                     Length
   );
 
+/**
+  Computes and returns a 32-bit CRC for a data buffer.
+  CRC32 value bases on ITU-T V.42.
+
+  If Buffer is NULL, then ASSERT().
+  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
+
+  @param[in]  Buffer       A pointer to the buffer on which the 32-bit CRC is to be computed.
+  @param[in]  Length       The number of bytes in the buffer Data.
+
+  @retval Crc32            The 32-bit CRC was computed for the data buffer.
+
+**/
+UINT32
+EFIAPI
+CalculateCrc32(
+  IN  VOID                         *Buffer,
+  IN  UINTN                        Length
+  );
 
 //
 // Base Library CPU Functions
@@ -6601,6 +6647,8 @@ typedef struct {
 #define IA32_IDT_GATE_TYPE_INTERRUPT_32  0x8E
 #define IA32_IDT_GATE_TYPE_TRAP_32       0x8F
 
+#define IA32_GDT_TYPE_TSS               0x9
+#define IA32_GDT_ALIGNMENT              8
 
 #if defined (MDE_CPU_IA32)
 ///
@@ -6617,6 +6665,70 @@ typedef union {
   UINT64  Uint64;
 } IA32_IDT_GATE_DESCRIPTOR;
 
+#pragma pack (1)
+//
+// IA32 Task-State Segment Definition
+//
+typedef struct {
+  UINT16    PreviousTaskLink;
+  UINT16    Reserved_2;
+  UINT32    ESP0;
+  UINT16    SS0;
+  UINT16    Reserved_10;
+  UINT32    ESP1;
+  UINT16    SS1;
+  UINT16    Reserved_18;
+  UINT32    ESP2;
+  UINT16    SS2;
+  UINT16    Reserved_26;
+  UINT32    CR3;
+  UINT32    EIP;
+  UINT32    EFLAGS;
+  UINT32    EAX;
+  UINT32    ECX;
+  UINT32    EDX;
+  UINT32    EBX;
+  UINT32    ESP;
+  UINT32    EBP;
+  UINT32    ESI;
+  UINT32    EDI;
+  UINT16    ES;
+  UINT16    Reserved_74;
+  UINT16    CS;
+  UINT16    Reserved_78;
+  UINT16    SS;
+  UINT16    Reserved_82;
+  UINT16    DS;
+  UINT16    Reserved_86;
+  UINT16    FS;
+  UINT16    Reserved_90;
+  UINT16    GS;
+  UINT16    Reserved_94;
+  UINT16    LDTSegmentSelector;
+  UINT16    Reserved_98;
+  UINT16    T;
+  UINT16    IOMapBaseAddress;
+} IA32_TASK_STATE_SEGMENT;
+
+typedef union {
+  struct {
+    UINT32  LimitLow:16;    ///< Segment Limit 15..00
+    UINT32  BaseLow:16;     ///< Base Address  15..00
+    UINT32  BaseMid:8;      ///< Base Address  23..16
+    UINT32  Type:4;         ///< Type (1 0 B 1)
+    UINT32  Reserved_43:1;  ///< 0
+    UINT32  DPL:2;          ///< Descriptor Privilege Level
+    UINT32  P:1;            ///< Segment Present
+    UINT32  LimitHigh:4;    ///< Segment Limit 19..16
+    UINT32  AVL:1;          ///< Available for use by system software
+    UINT32  Reserved_52:2;  ///< 0 0
+    UINT32  G:1;            ///< Granularity
+    UINT32  BaseHigh:8;     ///< Base Address 31..24
+  } Bits;
+  UINT64  Uint64;
+} IA32_TSS_DESCRIPTOR;
+#pragma pack ()
+
 #endif
 
 #if defined (MDE_CPU_X64)
@@ -6639,6 +6751,46 @@ typedef union {
   } Uint128;   
 } IA32_IDT_GATE_DESCRIPTOR;
 
+#pragma pack (1)
+//
+// IA32 Task-State Segment Definition
+//
+typedef struct {
+  UINT32    Reserved_0;
+  UINT64    RSP0;
+  UINT64    RSP1;
+  UINT64    RSP2;
+  UINT64    Reserved_28;
+  UINT64    IST[7];
+  UINT64    Reserved_92;
+  UINT16    Reserved_100;
+  UINT16    IOMapBaseAddress;
+} IA32_TASK_STATE_SEGMENT;
+
+typedef union {
+  struct {
+    UINT32  LimitLow:16;    ///< Segment Limit 15..00
+    UINT32  BaseLow:16;     ///< Base Address  15..00
+    UINT32  BaseMidl:8;     ///< Base Address  23..16
+    UINT32  Type:4;         ///< Type (1 0 B 1)
+    UINT32  Reserved_43:1;  ///< 0
+    UINT32  DPL:2;          ///< Descriptor Privilege Level
+    UINT32  P:1;            ///< Segment Present
+    UINT32  LimitHigh:4;    ///< Segment Limit 19..16
+    UINT32  AVL:1;          ///< Available for use by system software
+    UINT32  Reserved_52:2;  ///< 0 0
+    UINT32  G:1;            ///< Granularity
+    UINT32  BaseMidh:8;     ///< Base Address  31..24
+    UINT32  BaseHigh:32;    ///< Base Address  63..32
+    UINT32  Reserved_96:32; ///< Reserved
+  } Bits;
+  struct {
+    UINT64  Uint64;
+    UINT64  Uint64_1;
+  } Uint128;
+} IA32_TSS_DESCRIPTOR;
+#pragma pack ()
+
 #endif
 
 ///
@@ -8904,6 +9056,17 @@ AsmRdRand64  (
   OUT     UINT64                    *Rand
   );
 
+/**
+  Load given selector into TR register
+
+  @param[in] Selector     Task segment selector
+**/
+VOID
+EFIAPI
+AsmWriteTr (
+  IN UINT16 Selector
+  );
+
 #endif
 #endif