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From: Lin-Bao Zhang <2004.zhang@gmail.com>
To: Keir Fraser <keir.xen@gmail.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: xen-kernel and EDD
Date: Thu, 18 Aug 2011 18:52:15 +0800	[thread overview]
Message-ID: <CANuKeP=uAUoRP2T4w6MOEz6AMAeT7jRMqhcNj5UqZq4-V3wm4A@mail.gmail.com> (raw)
In-Reply-To: <CANuKePmurLWCEEJVzbQv2hSzccUiE-NHDkuVddgyRyXapb9Znw@mail.gmail.com>

in xen/arch/x86/boot/head.S:
there is a code ,it will copy bootstrap trampoline to low memory below 1MB.

I am not very familar with assembler code, who can explain its target :
I guess maybe 0x98000 has overlapped my EBDA area(95400 ~a0000) .
-----------------------
 /* Copy bootstrap trampoline to low memory, below 1MB. */
        mov     $sym_phys(trampoline_start),%esi
        mov     $bootsym_phys(trampoline_start),%edi
        mov     $trampoline_end - trampoline_start,%ecx
        rep     movsb

        mov     $0x98000,%esp
        call    cmdline_parse_early

        /* Jump into the relocated trampoline. */
        jmp     $BOOT_CS32,$bootsym_phys(trampoline_boot_cpu_entry)

#include "cmdline.S"

        .globl trampoline_start, trampoline_end
trampoline_start:
#include "trampoline.S"
trampoline_end:

        .text
__high_start:
#ifdef __x86_64__
#include "x86_64.S"
#else
#include "x86_32.S"
#endif

  reply	other threads:[~2011-08-18 10:52 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-08-17  5:11 xen-kernel and EDD Bob Zhang
2011-08-17  5:11 ` Bob Zhang
2011-08-18  5:08 ` Lin-Bao Zhang
2011-08-18  6:40   ` Keir Fraser
2011-08-18 10:43     ` Lin-Bao Zhang
2011-08-18 10:52       ` Lin-Bao Zhang [this message]
2011-08-18 11:05         ` Keir Fraser
2011-08-18 11:04       ` Keir Fraser
2011-08-18 15:55         ` Lin-Bao Zhang
2011-08-19  8:27           ` Lin-Bao Zhang
2011-08-19  8:49             ` Keir Fraser
2011-08-19  9:15               ` Lin-Bao Zhang
2011-08-19  9:23                 ` Keir Fraser
2011-08-19  9:51               ` Lin-Bao Zhang
2011-08-22  3:45                 ` Lin-Bao Zhang
2011-08-23  8:48         ` Paolo Bonzini
2011-08-23 10:24           ` Lin-Bao Zhang
2011-08-24  7:50             ` Lin-Bao Zhang
2011-08-24  8:03               ` Keir Fraser
2011-08-24  9:36                 ` BobZhang
2011-08-24  9:49                   ` Keir Fraser
2011-08-25  9:37                     ` Lin-Bao Zhang
2011-08-25  9:50                     ` Lin-Bao Zhang
2011-08-25 10:24                       ` Keir Fraser
2011-08-25 14:33                         ` Lin-Bao Zhang
2011-08-31  7:50                           ` Lin-Bao Zhang
2011-08-31  7:56                             ` Keir Fraser

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