| ;------------------------------------------------------------------------------ | |
| ; @file | |
| ; First code executed by processor after resetting. | |
| ; | |
| ; Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR> | |
| ; SPDX-License-Identifier: BSD-2-Clause-Patent | |
| ; | |
| ;------------------------------------------------------------------------------ | |
| BITS 16 | |
| ALIGN 16 | |
| ; | |
| ; Pad the image size to 4k when page tables are in VTF0 | |
| ; | |
| ; If the VTF0 image has page tables built in, then we need to make | |
| ; sure the end of VTF0 is 4k above where the page tables end. | |
| ; | |
| ; This is required so the page tables will be 4k aligned when VTF0 is | |
| ; located just below 0x100000000 (4GB) in the firmware device. | |
| ; | |
| %ifdef ALIGN_TOP_TO_4K_FOR_PAGING | |
| TIMES (0x1000 - ($ - EndOfPageTables)) DB 0 | |
| ; | |
| ; Pad the VTF0 Reset code for Bsp & Ap to 4k aligned block. | |
| ; Some implementations may need to keep the initial Reset code | |
| ; to be separated out from rest of the code. | |
| ; This padding will make sure lower 4K region below 4 GB may | |
| ; only contains few jmp instructions and data. | |
| ; | |
| TIMES (0x1000 - 0x20) DB 0 | |
| %endif | |
| ; | |
| ; 0xffffffe0 | |
| ; | |
| DD 0, 0, 0 | |
| ; | |
| ; The VTF signature (0xffffffec) | |
| ; | |
| ; VTF-0 means that the VTF (Volume Top File) code does not require | |
| ; any fixups. | |
| ; | |
| vtfSignature: | |
| DB 'V', 'T', 'F', 0 | |
| ALIGN 16 | |
| resetVector: | |
| ; | |
| ; Reset Vector | |
| ; | |
| ; This is where the processor will begin execution | |
| ; | |
| nop | |
| nop | |
| jmp EarlyBspInitReal16 | |
| ALIGN 16 | |
| fourGigabytes: | |