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Diffstat (limited to 'src/vendorcode/amd/agesa/f14/Legacy/bridge32.inc')
| -rw-r--r-- | src/vendorcode/amd/agesa/f14/Legacy/bridge32.inc | 577 |
1 files changed, 577 insertions, 0 deletions
diff --git a/src/vendorcode/amd/agesa/f14/Legacy/bridge32.inc b/src/vendorcode/amd/agesa/f14/Legacy/bridge32.inc new file mode 100644 index 0000000000..8685c6c077 --- /dev/null +++ b/src/vendorcode/amd/agesa/f14/Legacy/bridge32.inc @@ -0,0 +1,577 @@ +; **************************************************************************** +; * +; * @file +; * +; * Agesa structures and definitions +; * +; * Contains AMD AGESA core interface +; * +; * @xrefitem bom "File Content Label" "Release Content" +; * @e project: AGESA +; * @e sub-project: Include +; * @e \$Revision: 23714 $ @e \$Date: 2009-12-10 07:28:37 +0800 (Thu, 10 Dec 2009) $ +; +;***************************************************************************** +; +; Copyright (c) 2011, Advanced Micro Devices, Inc. +; All rights reserved. +; +; Redistribution and use in source and binary forms, with or without +; modification, are permitted provided that the following conditions are met: +; * Redistributions of source code must retain the above copyright +; notice, this list of conditions and the following disclaimer. +; * Redistributions in binary form must reproduce the above copyright +; notice, this list of conditions and the following disclaimer in the +; documentation and/or other materials provided with the distribution. +; * Neither the name of Advanced Micro Devices, Inc. nor the names of +; its contributors may be used to endorse or promote products derived +; from this software without specific prior written permission. +; +; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +; ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +; DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY +; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES +; (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; +; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND +; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS +; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +; +;***************************************************************************** + +PARAM1 textequ <[bp+8]> +PARAM2 textequ <[bp+12]> +PARAM3 textequ <[bp+16]> +RETAddress textequ <[bp+4]> + +AMD_PRIVATE_PARAMS STRUCT + Gate16_CS DW ? ; Segment of AMD_BRIDGE_32 and AMD_CALLOUT_16 + Gate16_SS DW ? ; RM stack segment + Router_Seg DW ? ; Segment of oem router + Router_Off DW ? ; Offset of oem router +AMD_PRIVATE_PARAMS ENDS + +; OEM may pre-define the GDT and selector offsets. If they do not, use our defaults. +IFNDEF AGESA_SELECTOR_GDT + AGESA_SELECTOR_GDT EQU 00h +ENDIF +IFNDEF AGESA_SELECTOR_CODE16 + AGESA_SELECTOR_CODE16 EQU 08h +ENDIF +IFNDEF AGESA_SELECTOR_DATA16 + AGESA_SELECTOR_DATA16 EQU 10h +ENDIF +IFNDEF AGESA_SELECTOR_CODE32 + AGESA_SELECTOR_CODE32 EQU 18h +ENDIF +IFNDEF AGESA_SELECTOR_DATA32 + AGESA_SELECTOR_DATA32 EQU 20h +ENDIF + + +AMD_BRIDGE_32_GDT MACRO GDT_Name:REQ + + GDT_Name LABEL BYTE + DD 000000000h, 000000000h ; NULL descriptor + DD 00000ffffh, 000009b00h ; 16-bit code, fixed up + DD 00000ffffh, 000009300h ; 16-bit data, fixed up + DD 00000ffffh, 000CF9B00h ; 32-bit protected mode code + DD 00000ffffh, 000CF9300h ; 32-bit protected mode data + GDT_Length EQU ($-GDT_Name) + +ENDM + +;+------------------------------------------------------------------------- +; +; AMD_BRIDGE_32 - Execute Agesa through Pushhigh interface +; +; Processing: +; The following steps are taken: +; 1) Enter 32bit Protected Mode (PM32) +; 2) Run AGESA code +; 3) Restore Real Mode (RM) +; +; Entry: +; [big real mode] : ds, es set to base 0 limit 4G segment +; EDX - if not 0, provides a FAR PTR to oem router (Seg | Offset) +; ESI - configuration block pointer +; +; Exit: +; EAX - return value +; ESI - configuration block pointer +; ds, es, fs, gs - Set to 4GB segment limit for Big Real Mode +; +; Modified: +; None +; + +AMD_BRIDGE_32 MACRO GDT_Name + + local copyGDT + local flushTo16PM + local agesaReturnAddress + local leave32bitPM + local flush2RM + + push gs + push fs + push ebx + push ecx + push edi + mov eax, esp + push eax + movzx esp, sp +; +; Do not use any locals here, BP will be changed frequently during RM->PM32->RM +; + pushf + cli ; Disable interrupts during AGESA + cld ; Need known direction flag during AGESA + +; +; Save the FAR PTR input parameter +; + mov gs, dx ; Offset + shr edx, 16 + mov fs, dx ; Segment +; +; Determine where our binary file is and get entry point +; + mov edx, (AMD_CONFIG_PARAMS PTR [esi]).ImageBasePtr + add edx, (AMD_IMAGE_HEADER PTR [edx]).EntryPointAddress +; +; Figure out the return address we will use after calling AGESA +; and store it in ebx until we have our stack set up properly +; + mov ebx, cs + shl ebx, 4 + add ebx, OFFSET agesaReturnAddress +; +; Save our current RM stack AND entry EBP +; + push ebp +; push esp + push ss + +; +; BEGIN --- STACK MUST BE BALANCED AT THIS POINT --- BEGIN +; +; Copy the GDT onto the stack for modification +; + mov cx, GDT_Length + sub sp, cx + mov bp, sp + lea di, GDT_Name +copyGDT: + mov al, cs:[di] + mov [bp], al + inc di + inc bp + loop copyGDT +; +; Patch 16-bit code and data descriptors on stack. We will +; fix up CS and SS for PM16 during the callout if applicable. +; + mov bp, sp + + mov eax, cs + shl eax, 4 + mov [bp+AGESA_SELECTOR_CODE16+2], ax + shr eax, 16 + mov [bp+AGESA_SELECTOR_CODE16+4], al + + mov eax, ss + shl eax, 4 + mov [bp+AGESA_SELECTOR_DATA16+2], ax + shr eax, 16 + mov [bp+AGESA_SELECTOR_DATA16+4], al +; +; Need to place Length and Address on GDT +; + mov eax, ss + shl eax, 4 + add eax, esp + push eax + push WORD PTR (GDT_Length-1) +; +; Load the GDT +; + mov bp, sp + lgdt FWORD PTR [bp] +; +; TABLE 1 +; +; Place PRIVATE DATA on stack DIRECTLY following GDT +; During this routine, stack data is critical. If +; order is changed or additional added, bad things +; will happen! +; +; HIGHEST PHYSICAL ADDRESS +; +; | ... | +; ------------------------ +; | old RM SP | +; | old RM SS | +; ------------------------ sp + SIZEOF AMD_PRIVATE_PARAMS + (SIZEOF GDT_LENGTH + 6 {size, address}) +; | GDT_DATA32 | +; | ... | +; | GDT_NULL | +; | GDT Addr, Length | +; ------------------------ sp + SIZEOF AMD_PRIVATE_PARAMS +; | Priv.Gate16_SS | +; | Priv.Gate16_CS | +; ------------------------ sp +; ------ THEN PUSH ------- +; | Return to 16-bit CS | +; | Return to 16-bit Off | +; | ... | +; +; LOWEST PHYSICAL ADDRESS +; + mov edi, esp + sub edi, SIZEOF AMD_PRIVATE_PARAMS + mov ax, cs + mov (AMD_PRIVATE_PARAMS PTR ss:[edi]).Gate16_CS, ax + mov ax, ss + mov (AMD_PRIVATE_PARAMS PTR ss:[edi]).Gate16_SS, ax + mov (AMD_PRIVATE_PARAMS PTR ss:[edi]).Router_Off, gs + mov (AMD_PRIVATE_PARAMS PTR ss:[edi]).Router_Seg, fs + + mov esp, edi +; +; Save an address for returning to 16 bit real mode on stack, +; we'll use it in a far ret after turning off CR0.PE so that +; we can take our address off and force a far jump. Be sure +; no unexpected data is on the stack after this! +; + mov ax, cs + push cs + lea ax, flush2RM + push ax +; +; Convert ss:esp to "flat" +; + + mov ax, sp + push ax + mov eax, ss + shl eax, 4 + add eax, esp + mov esp, eax ; Load the zero based ESP + +; +; Set CR0.PE +; + mov eax, CR0 ; Get CPU control word 0 + or al, 01 ; Enable CPU protected mode + mov CR0, eax ; Write back to CPU control word 0 + jmp flushTo16PM + +flushTo16PM: +; +; 16-bit protected mode +; + mov ax, AGESA_SELECTOR_DATA32 + mov ds, ax + mov es, ax + mov fs, ax + mov gs, ax + mov ss, ax +; +; Push our parameters RIGHT TO LEFT, and then return address +; + push esi ; AGESA configuration block pointer (data) + push ebx ; after AGESA return offset (32PM flat) - consumed by dispatcher ret + pushd AGESA_SELECTOR_CODE32 ; AGESA entry selector (32PM flat) + push edx ; AGESA entry point (32PM flat) + + DB 066h + retf ; <><><> Enter AGESA 32-bit code!!! <><><> + +agesaReturnAddress: +; +; Returns from the Agesa 32-bit code still PM32 +; + DB 0EAh + DD OFFSET leave32bitPM + DW AGESA_SELECTOR_CODE16 + +leave32bitPM: +; +; Now in 16-bit PM +; + add esp, 4 ; +4 to remove our config block pointer +; +; Eax reserve AGESA_STATUS return code, save it +; + mov ebx, eax +; +; Turn off CR0.PE, restore 64K stack limit +; + pop ax + mov sp, ax + mov ax, AGESA_SELECTOR_DATA16 + mov ss, ax + + mov eax, CR0 + and al, NOT 1 ; Disable protected mode + mov CR0, eax ; Write back CR0.PE +; +; Jump far to enter RM, we saved this address on the stack +; already. Hopefully stack is balanced through AGESA +; nor were any params added by pushing them on the stack and +; not removing them between BEGIN-END comments. +; + retf + +flush2RM: +; +; Set segments registers for big real mode before returning +; + xor ax, ax + mov ds, ax + mov es, ax + mov fs, ax + mov gs, ax +; +; Discard GDT, +6 for GDT pointer/size, privates +; + add esp, GDT_Length + 6 + SIZEOF AMD_PRIVATE_PARAMS +; +; Restore real mode stack and entry EBP +; + pop cx +; mov esp, [esp] + mov ss, cx + pop ebp +; +; Restore AGESA_STATUS return code to eax +; + mov eax, ebx +; +; END --- STACK MUST BE BALANCED TO THIS POINT --- END +; + + popf + pop ebx + mov esp, ebx + pop edi + pop ecx + pop ebx + pop fs + pop gs + ; EXIT AMD_BRIDGE_32 +ENDM +;+------------------------------------------------------------------------- +; +; AMD_CALLOUT_16 - Execute Callback from Pushhigh interface +; +; Processing: +; The following steps are taken: +; 1) Enter PM16 +; 2) Setup stack, get private params +; 3) Enter RM +; 4) Get 3 params +; 5) Call oemCallout OR oem router +; 6) Enter PM32 +; 7) Return to Agesa PH +; +; Entry: +; [32-bit protected mode] +; [esp+8] Func +; [esp+12] Data +; [esp+16] Configuration Block +; [esp+4] return address to Agesa +; +; Exit: +; [32-bit protected mode] +; +; Modified: +; None +; +AMD_CALLOUT_16 MACRO LocalOemCalloutRouter +; +; Note that we are still PM32, so MASM may work strangely +; + + push bp ; Save our original SP to access params + mov bp, sp + push bx + push si + push di + push cx + push dx + push di + + DB 066h, 0EAh + DW OFFSET PM16Entry + DW AGESA_SELECTOR_CODE16 + +PM16Entry: +; +; PM16 CS, but still PM32 SS, as we need to access our private params +; before we enter RM. +; +; Note: we are working below the stack temporarily, and and it will +; not affect our ability to get entry params +; + xor ecx, ecx + xor edx, edx +; +; SGDT will give us the original location of the GDT on our CAS stack. +; We need this value because our private parameters are located just +; below the GDT. +; + mov edi, esp + sub edi, GDT_Length + 6 + sgdt FWORD PTR [edi] ; [edi] = word size, dword address + mov edi, DWORD PTR [edi+2] ; Get the PM32 address only + sub edi, SIZEOF AMD_PRIVATE_PARAMS + 6 +; +; cx = code segment of this code in RM +; dx = stack segment of CAS in RM +; fs = code segment of oem router (save for later) +; gs = offset of oem router (save for later) +; fs and gs are loaded after switch to real mode because we can't +; use them as scratch pad registers in protected mode +; + mov cx, (AMD_PRIVATE_PARAMS PTR ss:[edi]).Gate16_CS + mov dx, (AMD_PRIVATE_PARAMS PTR ss:[edi]).Gate16_SS + + mov eax, edi ; Save edi in eax for after RM switch + mov edi, esp ; Save our current ESP for RM + + movzx ebx, dx + shl ebx, 4 + sub esp, ebx + +; +; We had been accessing the stack in PM32, we will now change to PM16 so we +; will make the stack segment 64KB limit so SP needs to be fixed made PM16 +; compatible. +; + mov bx, AGESA_SELECTOR_DATA16 + mov ss, bx + +; +; Save the RM segment and RM offset of the jump we will need to make in +; order to enter RM so that code in this segment is relocatable. +; +; BEGIN --- Don't unbalance the stack --- BEGIN +; + push cx + pushw OFFSET RMEntry + + mov ebx, CR0 + and bl, NOT 1 + mov CR0, ebx ; CR0.PE cleared +; +; Far jump to clear segment descriptor cache and enter RM +; + retf + +RMEntry: +; +; We are in RM, setup RM stack +; + movzx ebx, dx ; Get RM SS in ebx + shl ebx, 4 ; Get our stack top on entry in EBP to + sub ebp, ebx ; access our entry parameters + sub eax, ebx ; save copy of parameters address + mov ss, dx ; Set stack segment +; +; We are going to figure out the address to use when we return +; and have to go back into PM32 while we have access to it +; + movzx ebx, cx ; Get original CS in ebx + shl ebx, 4 + add ebx, OFFSET PM32Entry +; +; Now we put our data, func, block params into calling convention +; for our hook +; +; ECX = Func +; EDX = Data +; ESI = config pointer +; + mov ecx, PARAM1 ; Func + mov edx, PARAM2 ; Data + mov esi, PARAM3 ; pointer + + push ebx ; Save PM32 mode switch address + push edi ; Save PM32 stack pointer + pushf +; +; Get Router Function Address +; + mov edi, eax + mov ax, (AMD_PRIVATE_PARAMS PTR ss:[edi]).Router_Seg + mov fs, ax + mov ax, (AMD_PRIVATE_PARAMS PTR ss:[edi]).Router_Off + mov gs, ax + + mov eax, AGESA_UNSUPPORTED ; Default return value +; +; If AMD_BRIDGE_32 EDX == 0 call oemCallout +; otherwise call FAR PTR EDX +; +; Critical: +; sp+2 - EDI aka PM32 stack address +; sp+4 - address of PM32Entry in PM32 +; + mov bx, fs + shl ebx, 16 + mov bx, gs + + .if (ebx == 0) + call LocalOemCalloutRouter + .else +; +; Make far call to Router function +; + push cs + push offset CalloutReturn + push ebx + retf +CalloutReturn: + .endif +; +; Restore PM32 esp from RM stack +; + popf + pop edi ; Our PM32 stack pointer + pop edx ; Our PM32 mode switch address + + mov ebx, CR0 + or bl, 1 ; CR0.PE set + mov CR0, ebx + + mov ebx, AGESA_SELECTOR_DATA32 + pushd AGESA_SELECTOR_CODE32 ; PM32 selector + push edx ; PM32 entry point + + DB 066h + retf ; Far jump to enter PM32 + +PM32Entry: +; +; END --- Don't unbalance the stack --- END +; We are now PM32, so remember MASM is assembling in 16-bit again +; + mov ss, bx + mov ds, bx + mov es, bx + mov fs, bx + mov gs, bx + + mov sp, di + pop di + pop dx + pop cx + pop di + pop si + pop bx + pop bp + ; EXIT AMD_CALLOUT_16 +ENDM |