diff options
Diffstat (limited to 'Core/EM/S3/AcpiS3Wake.asm')
| -rw-r--r-- | Core/EM/S3/AcpiS3Wake.asm | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/Core/EM/S3/AcpiS3Wake.asm b/Core/EM/S3/AcpiS3Wake.asm new file mode 100644 index 0000000..642e5d5 --- /dev/null +++ b/Core/EM/S3/AcpiS3Wake.asm @@ -0,0 +1,339 @@ +;********************************************************************** +;********************************************************************** +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Pkwy, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;********************************************************************** +;********************************************************************** + +;********************************************************************** +; $Header: /Alaska/BIN/Modules/ACPI/Template/S3Support/S3Restore/AcpiS3Wake.asm 1 2/03/11 4:09p Oleksiyy $ +; +; $Revision: 1 $ +; +; $Date: 2/03/11 4:09p $ +;********************************************************************** +; Revision History +; ---------------- +; $Log: /Alaska/BIN/Modules/ACPI/Template/S3Support/S3Restore/AcpiS3Wake.asm $ +; +; 1 2/03/11 4:09p Oleksiyy +; [TAG] EIP53402 +; [Category] Improvement +; [Description] Create new label of ACPI with separate S3 Functionality +; [Files] S3Restore.cif +; S3Restore.sdl +; S3Restore.mak +; S3Resume.dxs +; AcpiS3Wake.asm +; S3Resume.c +; AcpiPeiS3Func.c +; AcpiPeiS3Func.h +; BootScriptExecuter.c +; +; 9 3/26/09 4:51p Oleksiyy +; New ACPI Core implementation - improves logic, execution time and +; memory usage of ACPI module. +; +; 8 4/29/08 5:36p Yakovlevs +; +; 7 4/15/08 12:28p Markw +; Add cs overrides. Option rom may change ds. +; +; 6 1/23/07 4:24p Markw +; Added thunk support for a call for S3 video repost. +; +; 5 5/27/05 4:18p Markw +; Added comment. +; +; 4 5/10/05 3:00p Markw +; Corrected wakeup vector address. Uses 16 bit data selector and adjusts +; base of data selector to pointer to wake up vector. +; +; 3 5/09/05 10:19a Markw +; Fixed cs and eip backwards. The OS is now given control. +; +; 2 5/07/05 11:54p Markw +; Goes to real mode. But when resuming to windows cs and ip switched. +; Will fix. +; +; 1 5/06/05 1:44p Markw +; +;********************************************************************** +;<AMI_FHDR_START> +; +; Name: AcpiS3Wake.asm +; +; Description: Provide the thunk S3 resume. +; +;<AMI_FHDR_END> +;********************************************************************** + +.586P +.model small +include token.equ + +ACPI_S3_SEG SEGMENT USE32 'CODE' +assume DS:ACPI_S3_SEG + +public _RealModeThunkStart +public _RealModeThunkSize + +align 16 +;This code may be exexuted + +REAL_MODE_BASE equ (MKF_ACPI_THUNK_REAL_MODE_SEGMENT * 16) + +;<AMI_PHDR_START> +;--------------------------------------------------------------------------- +; +; Procedure: RealModeThunk +; +; Description: Switch to 16-bit to jump/call to an address. +; This may be executed in place for a jump +; or copied to a location if a call. +; +; Input: +; GdtDesc:DWORD -- pointer descriptors with 16-bit. +; JmpAddress: DWORD -- Address to jump or call to. +; IsCall:BYTE -- TRUE - if call. FALSE - if jump. +; +; +; Output: None +;--------------------------------------------------------------------------- +;<AMI_PHDR_END> +REAL_MODE_THUNK_START equ $ +RealModeThunk proc C public, GdtDesc:DWORD, JmpAddress: DWORD, IsCall:BYTE + pushad + call get_base_addr ;push the eip. +get_base_addr: + pop ebx ;ebx = eip. + sub ebx, offset get_base_addr - REAL_MODE_THUNK_START ;ebx = Start address + + cmp IsCall, 0 + je @f + + ;If call, this function will return, so save original state. + ;Save 32 bit stack address of this module. + ;mov [ebx + offset StackSave - REAL_MODE_THUNK_START], esp + db 89h, 0a3h + dd offset StackSave - REAL_MODE_THUNK_START + ;sgdt fword ptr [ebx + offset GdtSave - REAL_MODE_THUNK_START] + db 0fh, 1, 83h + dd offset GdtSave - REAL_MODE_THUNK_START + ;sidt fword ptr [ebx + offset IdtSave - REAL_MODE_THUNK_START] + db 0fh, 1, 8bh + dd offset IdtSave - REAL_MODE_THUNK_START +@@: + +;--Switch to real mode-- + ;lidt fword ptr [ebx + offset LegacyLdtDescriptor - REAL_MODE_THUNK_START] + db 0fh, 1, 9bh + dd offset LegacyLdtDescriptor - REAL_MODE_THUNK_START + + mov edx, GdtDesc ;Get discriptor table with 16-bit descriptors. + mov ecx, [edx + 2] ;ecx = GDT Base + + ;---Set the code selector base address of the memory location + ; to jump to 16-bit protected mode above 1MB for execute in place. + mov eax, offset Next + mov ebx, eax + and eax, 00ffffffh ;eax = [23:00] of next + shr ebx, 24 ;ebx = [31:24] of next + + or [ecx + 8 + 2], eax ;GDT[1] (Code segment) base [23:00] of next + or [ecx + 8 + 7], bl ;GDT[1] base [24:31] of next + + ;---Set the data selector base address of the memory location + ; that contains the location to jump to for thunking. + ; This is so 16-bit protected mode can read the jump address + ; on the caller stack above 1MB. This is needed because the + ; jump code will be executed in place. + ; For call code, this will not do anything useful. + lea edx, JmpAddress + mov ebx, edx + and edx, 00ffffffh ;edx = [23:00] address of wakeup vector + shr ebx, 24 ;ebx = [31:24] address of wakeup vector + + or [ecx + 16 + 2], edx ;GDT[2] (Data segment) base [23:00] of next + or [ecx + 16 + 7], bl ;GDT[2] base [24:31] of next + ;--- + + + xor esp, esp ;esp will be set to a non-zero if a call. + ;This will also to be used to determine + ; if call or not call. This is because + ; IsCall is not available in 16-bit mode. + cmp IsCall, 0 + je @f + + ;Set real mode stack except the linear stack address. + mov esp, REAL_MODE_BASE + MKF_ACPI_THUNK_STACK_TOP + + ;------------------------------------------------- + ;Setup the stack to simulate a int xx or call. + ;------------------------------------------------- + + mov eax, offset ReturnFromPtr + sub eax, REAL_MODE_THUNK_START ;ax = return address. + + ;push the flags and return address to simulate the + ; return address on the stack for int xx or call. + pushf ;push flags in case intxx + push word ptr MKF_ACPI_THUNK_REAL_MODE_SEGMENT + push ax ;ax = return ip + + ;push to stack the cs:ip of the address to call to + push JmpAddress ;push cs:eip to jump to. + + ;------------------------------------------------- + ;Now the stack is setup, so that a retf will jump + ;to the address on stack. + ;------------------------------------------------- + + ;Adjust the stack address, so it will be relative to ss. + sub esp, REAL_MODE_BASE +@@: + + ;---Switch to 16-bit protected mode--- + mov edx, GdtDesc + lgdt fword ptr [edx] + + ;ITP doesn't display disassembly correctly until jump to 16 bit code. + mov ax, 10h ;16 bit data segment + mov ds, ax + mov es, ax + mov ss, ax + mov fs, ax + mov gs, ax + + ;jmp 08:next + db 0eah + dd 0 ;offset of next with new selector + dw 08 ;16 bit code selector +next: + ;---16 bit mode. Must use 16 bit instructions from here on.--- + ;------------------------------------------------------------- + + ;---Switch to real mode--- + mov eax, cr0 + and al, 0feh + mov cr0, eax ;switch to real mode + ;---In real mode--- + + db 66h + or esp, esp ;IsCall? + jnz @f + + ;jmp far ptr [0] ;Jump to the address stored in ds:0. + db 0ffh, 2eh ;The descriptor's base is in stack. + dw 0 + ;Does not return. +@@: + + ; jmp REAL_MODE_SEGMENT:real_mode_adr + db 0eah + dw offset real_mode_adr - REAL_MODE_THUNK_START + dw MKF_ACPI_THUNK_REAL_MODE_SEGMENT + +real_mode_adr: + db 8ch, 0c8h ;mov ax, cs + db 8eh, 0d8h ;mov ds, ax + db 8eh, 0c0h ;mov es, ax + db 8eh, 0d0h ;mov ss, ax + db 8eh, 0e0h ;mov fs, ax + db 8eh, 0e8h ;mov gs, ax + + retf ;call JmpAddress on stack. + +ReturnFromPtr: +;--------------End Real Mode operations--------- + + ;--Switch to protected mode-- + + ;mov esp, cs:[offset StackSave - REAL_MODE_THUNK_START] ;Get original stack back. + db 2eh, 66h, 8bh, 26h + dw offset StackSave - REAL_MODE_THUNK_START + + ;lgdt fword ptr cs:[offset GdtSave - REAL_MODE_THUNK_START] + db 2eh, 66h, 0fh, 1, 16h + dw offset GdtSave - REAL_MODE_THUNK_START + + mov eax, cr0 + or al, 1 ;Set PE bit + mov cr0, eax ;Turn on Protected Mode + + ;jmp 10:P32MODE + db 66h, 0eah + dd REAL_MODE_BASE + offset P32Mode - REAL_MODE_THUNK_START + dw 10h +P32Mode:: + mov ax, 08 + mov ds, ax + mov es, ax + mov ss, ax + mov fs, ax + mov gs, ax + + ;lidt fword ptr [REAL_MODE_BASE + offset IdtSave - REAL_MODE_THUNK_START] + db 0fh, 1, 1dh + dd REAL_MODE_BASE + offset IdtSave - REAL_MODE_THUNK_START + popad + ret +RealModeThunk endp + +align 8 + public LegacyLdtDescriptor +LegacyLdtDescriptor label fword + dw 3ffh + dd 0 + +;Note: The following below is only used in a call when this is copied to below 1MB. +;The data below can not be changed when this is executed from ROM. + + public StackSave +StackSave label dword + dd 0 + +align 8 + public GdtSave +GdtSave label fword + dw 0 + dd 0 + +align 8 + public IdtSave +IdtSave label fword + dw 0 + dd 0 + +REAL_MODE_THUNK_END EQU $ + +_RealModeThunkStart label dword + dd REAL_MODE_THUNK_START + +_RealModeThunkSize label dword + dd REAL_MODE_THUNK_END - REAL_MODE_THUNK_START + +ACPI_S3_SEG ENDS +end + +;********************************************************************** +;********************************************************************** +;** ** +;** (C)Copyright 1985-2009, American Megatrends, Inc. ** +;** ** +;** All Rights Reserved. ** +;** ** +;** 5555 Oakbrook Pkwy, Norcross, GA 30093 ** +;** ** +;** Phone: (770)-246-8600 ** +;** ** +;********************************************************************** +;********************************************************************** |