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author | jyao1 <jyao1> | 2014-07-24 06:52:43 +0000 |
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committer | jyao1 <jyao1@6f19259b-4bc3-4df7-8a09-765794883524> | 2014-07-24 06:52:43 +0000 |
commit | a33a2f62218e6e49a25d63474b7fe423d8ee4b71 (patch) | |
tree | ca8e4dd491a71f4a7e36fbc17c5e95276d555b43 /IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S | |
parent | 34717ef034ed275a15683dafd29cb518af50fff0 (diff) | |
download | edk2-a33a2f62218e6e49a25d63474b7fe423d8ee4b71.tar.gz edk2-a33a2f62218e6e49a25d63474b7fe423d8ee4b71.tar.bz2 edk2-a33a2f62218e6e49a25d63474b7fe423d8ee4b71.zip |
Add IntelFspWrapper to support boot EDKII on FSP bin.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed off by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed by: Ravi Rangarajan <ravi.p.rangarajan@intel.com>
Reviewed by: Maurice Ma <maurice.ma@intel.com>
Reviewed by: Giri Mudusuru <giri.p.mudusuru@intel.com>
Reviewed by: Liming Gao <liming.gao@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15676 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S')
-rw-r--r-- | IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S b/IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S new file mode 100644 index 0000000000..3145a484a3 --- /dev/null +++ b/IntelFspWrapperPkg/Library/SecPeiFspPlatformSecLibSample/Ia32/SecEntry.S @@ -0,0 +1,325 @@ +#------------------------------------------------------------------------------
+#
+# Copyright (c) 2014, Intel Corporation. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution. The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php.
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+# Module Name:
+#
+# SecEntry.S
+#
+# Abstract:
+#
+# This is the code that goes from real-mode to protected mode.
+# It consumes the reset vector, calls TempRamInit API from FSP binary.
+#
+#------------------------------------------------------------------------------
+
+#include "Fsp.h"
+
+ASM_GLOBAL ASM_PFX(_TEXT_REALMODE)
+ASM_PFX(_TEXT_REALMODE):
+#----------------------------------------------------------------------------
+#
+# Procedure: _ModuleEntryPoint
+#
+# Input: None
+#
+# Output: None
+#
+# Destroys: Assume all registers
+#
+# Description:
+#
+# Transition to non-paged flat-model protected mode from a
+# hard-coded GDT that provides exactly two descriptors.
+# This is a bare bones transition to protected mode only
+# used for a while in PEI and possibly DXE.
+#
+# After enabling protected mode, a far jump is executed to
+# transfer to PEI using the newly loaded GDT.
+#
+# Return: None
+#
+# MMX Usage:
+# MM0 = BIST State
+# MM5 = Save time-stamp counter value high32bit
+# MM6 = Save time-stamp counter value low32bit.
+#
+#----------------------------------------------------------------------------
+
+.align 4
+ASM_GLOBAL ASM_PFX(_ModuleEntryPoint)
+ASM_PFX(_ModuleEntryPoint):
+ fninit # clear any pending Floating point exceptions
+ #
+ # Store the BIST value in mm0
+ #
+ movd %eax, %mm0
+
+ #
+ # Save time-stamp counter value
+ # rdtsc load 64bit time-stamp counter to EDX:EAX
+ #
+ rdtsc
+ movd %edx, %mm5
+ movd %ecx, %mm6
+
+ #
+ # Load the GDT table in GdtDesc
+ #
+ movl $GdtDesc, %esi
+ .byte 0x66
+ lgdt %cs:(%si)
+
+ #
+ # Transition to 16 bit protected mode
+ #
+ movl %cr0, %eax # Get control register 0
+ orl $0x00000003, %eax # Set PE bit (bit #0) & MP bit (bit #1)
+ movl %eax, %cr0 # Activate protected mode
+
+ movl %cr4, %eax # Get control register 4
+ orl $0x00000600, %eax # Set OSFXSR bit (bit #9) & OSXMMEXCPT bit (bit #10)
+ movl %eax, %cr4
+
+ #
+ # Now we're in 16 bit protected mode
+ # Set up the selectors for 32 bit protected mode entry
+ #
+ movw SYS_DATA_SEL, %ax
+ movw %ax, %ds
+ movw %ax, %es
+ movw %ax, %fs
+ movw %ax, %gs
+ movw %ax, %ss
+
+ #
+ # Transition to Flat 32 bit protected mode
+ # The jump to a far pointer causes the transition to 32 bit mode
+ #
+ movl $ProtectedModeEntryLinearAddress, %esi
+ jmp *%cs:(%si)
+
+ASM_GLOBAL ASM_PFX(_TEXT_PROTECTED_MODE)
+ASM_PFX(_TEXT_PROTECTED_MODE):
+
+#----------------------------------------------------------------------------
+#
+# Procedure: ProtectedModeEntryPoint
+#
+# Input: None
+#
+# Output: None
+#
+# Destroys: Assume all registers
+#
+# Description:
+#
+# This function handles:
+# Call two basic APIs from FSP binary
+# Initializes stack with some early data (BIST, PEI entry, etc)
+#
+# Return: None
+#
+#----------------------------------------------------------------------------
+
+.align 4
+ASM_GLOBAL ASM_PFX(ProtectedModeEntryPoint)
+ASM_PFX(ProtectedModeEntryPoint):
+
+ # Find the fsp info header
+ movl PcdGet32 (PcdFlashFvFspBase), %edi
+ movl PcdGet32 (PcdFlashFvFspSize), %ecx
+
+ movl FVH_SIGINATURE_OFFSET(%edi), %eax
+ cmp $FVH_SIGINATURE_VALID_VALUE, %eax
+ jnz FspHeaderNotFound
+
+ xorl %eax, %eax
+ movw FVH_EXTHEADER_OFFSET_OFFSET(%edi), %ax
+ cmp %ax, 0
+ jnz FspFvExtHeaderExist
+
+ xorl %eax, %eax
+ movw FVH_HEADER_LENGTH_OFFSET(%edi), %ax # Bypass Fv Header
+ addl %eax, %edi
+ jmp FspCheckFfsHeader
+
+FspFvExtHeaderExist:
+ addl %eax, %edi
+ movl FVH_EXTHEADER_SIZE_OFFSET(%edi), %eax # Bypass Ext Fv Header
+ addl %eax, %edi
+
+ # Round up to 8 byte alignment
+ movl %edi, %eax
+ andb $0x07, %al
+ jz FspCheckFfsHeader
+
+ and $0xFFFFFFF8, %edi
+ add $0x08, %edi
+
+FspCheckFfsHeader:
+ # Check the ffs guid
+ movl (%edi), %eax
+ cmp $FSP_HEADER_GUID_DWORD1, %eax
+ jnz FspHeaderNotFound
+
+ movl 0x4(%edi), %eax
+ cmp $FSP_HEADER_GUID_DWORD2, %eax
+ jnz FspHeaderNotFound
+
+ movl 0x08(%edi), %eax
+ cmp $FSP_HEADER_GUID_DWORD3, %eax
+ jnz FspHeaderNotFound
+
+ movl 0x0c(%edi), %eax
+ cmp $FSP_HEADER_GUID_DWORD4, %eax
+ jnz FspHeaderNotFound
+
+ add $FFS_HEADER_SIZE_VALUE, %edi # Bypass the ffs header
+
+ # Check the section type as raw section
+ movb SECTION_HEADER_TYPE_OFFSET(%edi), %al
+ cmp $0x19, %al
+ jnz FspHeaderNotFound
+
+ addl $RAW_SECTION_HEADER_SIZE_VALUE, %edi # Bypass the section header
+ jmp FspHeaderFound
+
+FspHeaderNotFound:
+ jmp .
+
+FspHeaderFound:
+ # Get the fsp TempRamInit Api address
+ movl FSP_HEADER_IMAGEBASE_OFFSET(%edi), %eax
+ addl FSP_HEADER_TEMPRAMINIT_OFFSET(%edi), %eax
+
+ # Setup the hardcode stack
+ movl $TempRamInitStack, %esp
+
+ # Call the fsp TempRamInit Api
+ jmp *%eax
+
+TempRamInitDone:
+ cmp $0x0, %eax
+ jnz FspApiFailed
+
+ # ECX: start of range
+ # EDX: end of range
+ movl %edx, %esp
+ pushl %edx
+ pushl %ecx
+ pushl %eax # zero - no hob list yet
+ call ASM_PFX(CallPeiCoreEntryPoint)
+
+FspApiFailed:
+ jmp .
+
+.align 0x10
+TempRamInitStack:
+ .long TempRamInitDone
+ .long TempRamInitParams
+
+#
+# ROM-based Global-Descriptor Table for the Tiano PEI Phase
+#
+.align 16
+
+#
+# GDT[0]: 0x00: Null entry, never used.
+#
+.equ NULL_SEL, . - GDT_BASE # Selector [0]
+GDT_BASE:
+BootGdtTable: .long 0
+ .long 0
+#
+# Linear data segment descriptor
+#
+.equ LINEAR_SEL, . - GDT_BASE # Selector [0x8]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x92 # present, ring 0, data, expand-up, writable
+ .byte 0xCF # page-granular, 32-bit
+ .byte 0
+#
+# Linear code segment descriptor
+#
+.equ LINEAR_CODE_SEL, . - GDT_BASE # Selector [0x10]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x9B # present, ring 0, data, expand-up, not-writable
+ .byte 0xCF # page-granular, 32-bit
+ .byte 0
+#
+# System data segment descriptor
+#
+.equ SYS_DATA_SEL, . - GDT_BASE # Selector [0x18]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x93 # present, ring 0, data, expand-up, not-writable
+ .byte 0xCF # page-granular, 32-bit
+ .byte 0
+
+#
+# System code segment descriptor
+#
+.equ SYS_CODE_SEL, . - GDT_BASE # Selector [0x20]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x9A # present, ring 0, data, expand-up, writable
+ .byte 0xCF # page-granular, 32-bit
+ .byte 0
+#
+# Spare segment descriptor
+#
+.equ SYS16_CODE_SEL, . - GDT_BASE # Selector [0x28]
+ .word 0xFFFF # limit 0xFFFFF
+ .word 0 # base 0
+ .byte 0x0E # Changed from F000 to E000.
+ .byte 0x9B # present, ring 0, code, expand-up, writable
+ .byte 0x00 # byte-granular, 16-bit
+ .byte 0
+#
+# Spare segment descriptor
+#
+.equ SYS16_DATA_SEL, . - GDT_BASE # Selector [0x30]
+ .word 0xFFFF # limit 0xFFFF
+ .word 0 # base 0
+ .byte 0
+ .byte 0x93 # present, ring 0, data, expand-up, not-writable
+ .byte 0x00 # byte-granular, 16-bit
+ .byte 0
+
+#
+# Spare segment descriptor
+#
+.equ SPARE5_SEL, . - GDT_BASE # Selector [0x38]
+ .word 0 # limit 0
+ .word 0 # base 0
+ .byte 0
+ .byte 0 # present, ring 0, data, expand-up, writable
+ .byte 0 # page-granular, 32-bit
+ .byte 0
+.equ GDT_SIZE, . - BootGdtTable # Size, in bytes
+
+#
+# GDT Descriptor
+#
+GdtDesc: # GDT descriptor
+ .word GDT_SIZE - 1 # GDT limit
+ .long BootGdtTable # GDT base address
+
+ASM_PFX(ProtectedModeEntryLinearAddress):
+ProtectedModeEntryLinearOffset:
+ .long ProtectedModeEntryPoint # Offset of our 32 bit code
+ .word LINEAR_CODE_SEL
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