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| author | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-01-04 16:18:09 +0000 |
|---|---|---|
| committer | jljusten <jljusten@6f19259b-4bc3-4df7-8a09-765794883524> | 2010-01-04 16:18:09 +0000 |
| commit | 141815f3c71f5a3d21a4e34aa1386d28fe63923c (patch) | |
| tree | cdceba75adaaa98775c1409cc6a2600546765387 /OvmfPkg/ResetVector | |
| parent | d22d1f535bd13dfa6c94d9ed61631813fe205c2f (diff) | |
| download | edk2-141815f3c71f5a3d21a4e34aa1386d28fe63923c.tar.gz edk2-141815f3c71f5a3d21a4e34aa1386d28fe63923c.tar.bz2 edk2-141815f3c71f5a3d21a4e34aa1386d28fe63923c.zip | |
OVMF VTF0 Reset Vector: Cleanup Global Descriptor Table (GDT)
git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9676 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/ResetVector')
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.ia32.port80.raw | bin | 548 -> 500 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.ia32.raw | bin | 532 -> 484 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.ia32.serial.raw | bin | 932 -> 884 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.x64.port80.raw | bin | 28676 -> 28676 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.x64.raw | bin | 28676 -> 28676 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Bin/ResetVector.x64.serial.raw | bin | 28676 -> 28676 bytes | |||
| -rw-r--r-- | OvmfPkg/ResetVector/Ia16/16RealTo32Flat.asm | 123 |
7 files changed, 58 insertions, 65 deletions
diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.port80.raw b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.port80.raw Binary files differindex ad5f156b97..c071f1afaf 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.port80.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.port80.raw diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.raw b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.raw Binary files differindex 5761a75af6..97e639ab70 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.raw diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.serial.raw b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.serial.raw Binary files differindex 779553e4ae..c775900fbf 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.ia32.serial.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.ia32.serial.raw diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.x64.port80.raw b/OvmfPkg/ResetVector/Bin/ResetVector.x64.port80.raw Binary files differindex 5c9a7a3d54..09c9117072 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.x64.port80.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.x64.port80.raw diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw b/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw Binary files differindex b93599e174..4b98137b1d 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.x64.raw diff --git a/OvmfPkg/ResetVector/Bin/ResetVector.x64.serial.raw b/OvmfPkg/ResetVector/Bin/ResetVector.x64.serial.raw Binary files differindex b7726e3a87..dfbb4f46d3 100644 --- a/OvmfPkg/ResetVector/Bin/ResetVector.x64.serial.raw +++ b/OvmfPkg/ResetVector/Bin/ResetVector.x64.serial.raw diff --git a/OvmfPkg/ResetVector/Ia16/16RealTo32Flat.asm b/OvmfPkg/ResetVector/Ia16/16RealTo32Flat.asm index d4416ce85e..adf049cf77 100644 --- a/OvmfPkg/ResetVector/Ia16/16RealTo32Flat.asm +++ b/OvmfPkg/ResetVector/Ia16/16RealTo32Flat.asm @@ -63,78 +63,71 @@ gdtr: ALIGN 16
+;
+; Macros for GDT entries
+;
+
+%define PRESENT_FLAG(p) (p << 7)
+%define DPL(dpl) (dpl << 5)
+%define SYSTEM_FLAG(s) (s << 4)
+%define DESC_TYPE(t) (t)
+
+; Type: data, expand-up, writable, accessed
+%define DATA32_TYPE 3
+
+; Type: execute, readable, expand-up, accessed
+%define CODE32_TYPE 0xb
+
+; Type: execute, readable, expand-up, accessed
+%define CODE64_TYPE 0xb
+
+%define GRANULARITY_FLAG(g) (g << 7)
+%define DEFAULT_SIZE32(d) (d << 6)
+%define CODE64_FLAG(l) (l << 5)
+%define UPPER_LIMIT(l) (l)
+
+;
+; The Global Descriptor Table (GDT)
+;
+
GDT_BASE:
; null descriptor
NULL_SEL equ $-GDT_BASE
- dw 0 ; limit 15:0
- dw 0 ; base 15:0
- db 0 ; base 23:16
- db 0 ; type
- db 0 ; limit 19:16, flags
- db 0 ; base 31:24
+ DW 0 ; limit 15:0
+ DW 0 ; base 15:0
+ DB 0 ; base 23:16
+ DB 0 ; sys flag, dpl, type
+ DB 0 ; limit 19:16, flags
+ DB 0 ; base 31:24
; linear data segment descriptor
-LINEAR_SEL equ $-GDT_BASE
- dw 0FFFFh ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 093h ; present, ring 0, data, expand-up, writable, accessed
- db 0CFh ; page-granular, 32-bit
- db 0
+LINEAR_SEL equ $-GDT_BASE
+ DW 0xffff ; limit 15:0
+ DW 0 ; base 15:0
+ DB 0 ; base 23:16
+ DB PRESENT_FLAG(1)|DPL(0)|SYSTEM_FLAG(1)|DESC_TYPE(DATA32_TYPE)
+ DB GRANULARITY_FLAG(1)|DEFAULT_SIZE32(1)|CODE64_FLAG(0)|UPPER_LIMIT(0xf)
+ DB 0 ; base 31:24
; linear code segment descriptor
-LINEAR_CODE_SEL equ $-GDT_BASE
- dw 0FFFFh ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 09Bh ; present, ring 0, data, expand-up, writable, accessed
- db 0CFh ; page-granular, 32-bit
- db 0
-
-; system data segment descriptor
-SYS_DATA_SEL equ $-GDT_BASE
- dw 0FFFFh ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 093h ; present, ring 0, data, expand-up, writable, accessed
- db 0CFh ; page-granular, 32-bit
- db 0
-
-; system code segment descriptor
-SYS_CODE_SEL equ $-GDT_BASE
- dw 0FFFFh ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 09Bh ; present, ring 0, data, expand-up, writable, accessed
- db 0CFh ; page-granular, 32-bit
- db 0
-
-; spare segment descriptor
-LINEAR_CODE64_SEL equ $-GDT_BASE
- DW -1 ; LimitLow
- DW 0 ; BaseLow
- DB 0 ; BaseMid
- DB 9bh
- DB 0afh ; LimitHigh (CS.L=1, CS.D=0)
- DB 0 ; BaseHigh
-
-; spare segment descriptor
-SPARE4_SEL equ $-GDT_BASE
- dw 0 ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 0 ; present, ring 0, data, expand-up, writable
- db 0 ; page-granular, 32-bit
- db 0
-
-; spare segment descriptor
-SPARE5_SEL equ $-GDT_BASE
- dw 0 ; limit 0xFFFFF
- dw 0 ; base 0
- db 0
- db 0 ; present, ring 0, data, expand-up, writable
- db 0 ; page-granular, 32-bit
- db 0
+LINEAR_CODE_SEL equ $-GDT_BASE
+ DW 0xffff ; limit 15:0
+ DW 0 ; base 15:0
+ DB 0 ; base 23:16
+ DB PRESENT_FLAG(1)|DPL(0)|SYSTEM_FLAG(1)|DESC_TYPE(CODE32_TYPE)
+ DB GRANULARITY_FLAG(1)|DEFAULT_SIZE32(1)|CODE64_FLAG(0)|UPPER_LIMIT(0xf)
+ DB 0 ; base 31:24
+
+%ifdef ARCH_X64
+; linear code (64-bit) segment descriptor
+LINEAR_CODE64_SEL equ $-GDT_BASE
+ DW 0xffff ; limit 15:0
+ DW 0 ; base 15:0
+ DB 0 ; base 23:16
+ DB PRESENT_FLAG(1)|DPL(0)|SYSTEM_FLAG(1)|DESC_TYPE(CODE64_TYPE)
+ DB GRANULARITY_FLAG(1)|DEFAULT_SIZE32(0)|CODE64_FLAG(1)|UPPER_LIMIT(0xf)
+ DB 0 ; base 31:24
+%endif
GDT_END:
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