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UefiCpuPkg: Added segment descriptors' data structures.

This commit is contained in:
Mikhail Krichanov 2023-11-20 21:37:25 +03:00
parent 9b8affc22d
commit 25d3704cc6
2 changed files with 297 additions and 108 deletions
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250
UefiCpuPkg/Library/CpuArchLib/CpuGdt.c
View File

@ -14,104 +14,174 @@
// Global descriptor table (GDT) Template
//
STATIC GDT_ENTRIES mGdtTemplate = {
//
// NULL_SEL
//
{
0x0, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x0, // type
0x0, // limit 19:16, flags
0x0, // base 31:24
.Null = {
.SegmentLimit_15_0 = 0x0,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Type = 0x0,
.S = 0,
.DPL = 0,
.P = 0,
.SegmentLimit_19_16 = 0x0,
.AVL = 0,
.L = 0,
.D_B = 0,
.G = 0,
.BaseAddress_31_24 = 0x0
},
//
// LINEAR_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x092, // present, ring 0, data, read/write
0x0CF, // page-granular, 32-bit
0x0,
.Linear = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 0,
.Writable = 1,
.ExpansionDirection = 0,
.IsCode = 0,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.UpperBound = 1,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// LINEAR_CODE_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x09F, // present, ring 0, code, execute/read, conforming, accessed
0x0CF, // page-granular, 32-bit
0x0,
.LinearCode = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 1,
.Readable = 1,
.Conforming = 1,
.IsCode = 1,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.Is32Bit = 1,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// SYS_DATA_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x093, // present, ring 0, data, read/write, accessed
0x0CF, // page-granular, 32-bit
0x0,
.SysData = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 1,
.Writable = 1,
.ExpansionDirection = 0,
.IsCode = 0,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.UpperBound = 1,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// SYS_CODE_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x09A, // present, ring 0, code, execute/read
0x0CF, // page-granular, 32-bit
0x0,
.SysCode = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 0,
.Readable = 1,
.Conforming = 0,
.IsCode = 1,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.Is32Bit = 1,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// SYS_CODE16_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x09A, // present, ring 0, code, execute/read
0x08F, // page-granular, 16-bit
0x0, // base 31:24
.SysCode16 = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 0,
.Readable = 1,
.Conforming = 0,
.IsCode = 1,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.Is32Bit = 0,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// LINEAR_DATA64_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x092, // present, ring 0, data, read/write
0x0CF, // page-granular, 32-bit
0x0,
.LinearData64 = {
.SegmentLimit_15_0 = 0xFFFF,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Accessed = 0,
.Writable = 1,
.ExpansionDirection = 0,
.IsCode = 0,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.SegmentLimit_19_16 = 0xF,
.Available = 0,
.Reserved = 0,
.UpperBound = 1,
.Granularity = 1,
.BaseAddress_31_24 = 0x0
},
//
// LINEAR_CODE64_SEL
//
{
0x0FFFF, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x09A, // present, ring 0, code, execute/read
0x0AF, // page-granular, 64-bit code
0x0, // base (high)
.LinearCode64 = {
.Reserved1 = 0x0,
.Reserved2 = 0x0,
.Accessed = 0,
.Readable = 1,
.Conforming = 0,
.IsCode = 1,
.IsNotSystemSegment = 1,
.DescriptorPrivilegeLevel = 0,
.SegmentPresent = 1,
.Reserved3 = 0x0,
.Available = 0,
.LongMode = 1,
.Is32Bit = 0,
.Granularity = 1,
.Reserved4 = 0x0
},
//
// SPARE5_SEL
//
{
0x0, // limit 15:0
0x0, // base 15:0
0x0, // base 23:16
0x0, // type
0x0, // limit 19:16, flags
0x0, // base 31:24
.Spare5 = {
.SegmentLimit_15_0 = 0x0,
.BaseAddress_15_0 = 0x0,
.BaseAddress_23_16 = 0x0,
.Type = 0x0,
.S = 0,
.DPL = 0,
.P = 0,
.SegmentLimit_19_16 = 0x0,
.AVL = 0,
.L = 0,
.D_B = 0,
.G = 0,
.BaseAddress_31_24 = 0x0,
},
};

155
UefiCpuPkg/Library/CpuArchLib/CpuGdt.h
View File

@ -20,26 +20,145 @@
// Global Descriptor Entry structures
//
typedef struct _GDT_ENTRY {
UINT16 Limit15_0;
UINT16 Base15_0;
UINT8 Base23_16;
UINT8 Type;
UINT8 Limit19_16_and_flags;
UINT8 Base31_24;
typedef struct {
UINT16 SegmentLimit_15_0;
UINT16 BaseAddress_15_0;
UINT8 BaseAddress_23_16;
UINT8 Type : 4;
UINT8 S : 1;
UINT8 DPL : 2;
UINT8 P : 1;
UINT8 SegmentLimit_19_16 : 4;
UINT8 AVL : 1;
UINT8 L : 1;
UINT8 D_B : 1;
UINT8 G : 1;
UINT8 BaseAddress_31_24;
} SEGMENT_DESCRIPTOR;
typedef struct {
UINT16 SegmentLimit_15_0;
UINT16 BaseAddress_15_0;
UINT8 BaseAddress_23_16;
//
// Type
//
UINT8 Accessed : 1;
UINT8 Writable : 1;
UINT8 ExpansionDirection : 1;
UINT8 IsCode : 1;
UINT8 IsNotSystemSegment : 1;
UINT8 DescriptorPrivilegeLevel : 2;
UINT8 SegmentPresent : 1;
UINT8 SegmentLimit_19_16 : 4;
UINT8 Available : 1;
UINT8 Reserved : 1;
UINT8 UpperBound : 1;
UINT8 Granularity : 1;
UINT8 BaseAddress_31_24;
} DATA_SEGMENT_32;
typedef struct {
UINT16 SegmentLimit_15_0;
UINT16 BaseAddress_15_0;
UINT8 BaseAddress_23_16;
//
// Type
//
UINT8 Accessed : 1;
UINT8 Readable : 1;
UINT8 Conforming : 1;
UINT8 IsCode : 1;
UINT8 IsNotSystemSegment : 1;
UINT8 DescriptorPrivilegeLevel : 2;
UINT8 SegmentPresent : 1;
UINT8 SegmentLimit_19_16 : 4;
UINT8 Available : 1;
UINT8 Reserved : 1;
UINT8 Is32Bit : 1;
UINT8 Granularity : 1;
UINT8 BaseAddress_31_24;
} CODE_SEGMENT_32;
typedef struct {
UINT32 Reserved1;
UINT8 Reserved2;
//
// Type
//
UINT8 Accessed : 1;
UINT8 Readable : 1;
UINT8 Conforming : 1;
UINT8 IsCode : 1;
UINT8 IsNotSystemSegment : 1;
UINT8 DescriptorPrivilegeLevel : 2;
UINT8 SegmentPresent : 1;
UINT8 Reserved3 : 4;
UINT8 Available : 1;
UINT8 LongMode : 1;
UINT8 Is32Bit : 1;
UINT8 Granularity : 1;
UINT8 Reserved4;
} CODE_SEGMENT_64;
typedef struct {
UINT16 SegmentLimit_15_0;
UINT16 BaseAddress_15_0;
UINT8 BaseAddress_23_16;
UINT8 Type : 4;
UINT8 IsNotSystemSegment : 1;
UINT8 DescriptorPrivilegeLevel : 2;
UINT8 SegmentPresent : 1;
UINT8 SegmentLimit_19_16 : 4;
UINT8 Reserved : 3;
UINT8 Granularity : 1;
UINT8 BaseAddress_31_24;
} SYSTEM_SEGMENT;
typedef struct {
UINT16 OffsetInSegment_15_0;
UINT16 SegmentSelector;
UINT8 ParameterCount : 5;
UINT8 Reserved : 3;
UINT8 Type : 4;
UINT8 IsNotSystemSegment : 1;
UINT8 DescriptorPrivilegeLevel : 2;
UINT8 SegmentPresent : 1;
UINT16 OffsetInSegment_31_16;
} CALL_GATE_32;
typedef struct {
CALL_GATE_32 Common;
UINT32 OffsetInSegment_63_31;
UINT32 Reserved;
} CALL_GATE_64;
typedef union {
DATA_SEGMENT_32 DataSegment32;
CODE_SEGMENT_32 CodeSegment32;
CODE_SEGMENT_64 CodeSegment64;
CALL_GATE_32 CallGate32;
SYSTEM_SEGMENT SystemSegment;
SEGMENT_DESCRIPTOR SegmentDescriptor;
} GDT_ENTRY;
typedef
struct _GDT_ENTRIES {
GDT_ENTRY Null;
GDT_ENTRY Linear;
GDT_ENTRY LinearCode;
GDT_ENTRY SysData;
GDT_ENTRY SysCode;
GDT_ENTRY SysCode16;
GDT_ENTRY LinearData64;
GDT_ENTRY LinearCode64;
GDT_ENTRY Spare5;
typedef struct {
SEGMENT_DESCRIPTOR Null;
DATA_SEGMENT_32 Linear;
CODE_SEGMENT_32 LinearCode;
DATA_SEGMENT_32 SysData;
CODE_SEGMENT_32 SysCode;
CODE_SEGMENT_32 SysCode16;
DATA_SEGMENT_32 LinearData64;
CODE_SEGMENT_64 LinearCode64;
SEGMENT_DESCRIPTOR Spare5;
} GDT_ENTRIES;
#pragma pack ()