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dea6002d6e
REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4494 Current reset vector uses 0xffffffe0 as AP waking vector, and expects GenFv generates code aligned on a 4k boundary which will jump to this location. However, some issues are listed below 1. GenFV doesn't generate code as the comment expects, because GenFv assumes no modifications are required to the VTF-0 'Volume Top File'. 2. Even if removing VFT0 signature and let GenFv to modify, Genfv is hard-code using another flash address 0xffffffd0. 3. In the same patch series, AP waking vector code is removed from GenFv, because no such usage anymore. The existing of first two issues also approve the usage is not available for a long time. Therefore, remove AP waking vector related code. Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Anthony Perard <anthony.perard@citrix.com> Cc: Julien Grall <julien@xen.org> Reviewed-by: Ray Ni <ray.ni@intel.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
70 lines
1.6 KiB
NASM
70 lines
1.6 KiB
NASM
;------------------------------------------------------------------------------
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; @file
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; First code executed by processor after resetting.
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;
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; Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR>
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; Copyright (c) 2019, Citrix Systems, Inc.
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;
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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;------------------------------------------------------------------------------
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BITS 16
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ALIGN 16
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;
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; Pad the image size to 4k when page tables are in VTF0
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;
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; If the VTF0 image has page tables built in, then we need to make
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; sure the end of VTF0 is 4k above where the page tables end.
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;
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; This is required so the page tables will be 4k aligned when VTF0 is
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; located just below 0x100000000 (4GB) in the firmware device.
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;
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%ifdef ALIGN_TOP_TO_4K_FOR_PAGING
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TIMES (0x1000 - ($ - EndOfPageTables) - (fourGigabytes - xenPVHEntryPoint)) DB 0
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%endif
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BITS 32
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xenPVHEntryPoint:
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;
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; Entry point to use when running as a Xen PVH guest. (0xffffffd0)
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;
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; Description of the expected state of the machine when this entry point is
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; used can be found at:
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; https://xenbits.xenproject.org/docs/unstable/misc/pvh.html
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;
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jmp xenPVHMain
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BITS 16
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ALIGN 16
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;
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; 0xffffffe0
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;
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DD 0, 0, 0
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;
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; The VTF signature (0xffffffec)
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;
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; VTF-0 means that the VTF (Volume Top File) code does not require
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; any fixups.
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;
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vtfSignature:
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DB 'V', 'T', 'F', 0
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ALIGN 16
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resetVector:
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;
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; Reset Vector
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;
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; This is where the processor will begin execution
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;
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jmp EarlyBspInitReal16
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ALIGN 16
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fourGigabytes:
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