0,0 → 1,74 |
# |
# Copyright (C) 2001-2004 Jakub Jermar |
# 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. |
# - The name of the author may not be used to endorse or promote products |
# derived from this software without specific prior written permission. |
# |
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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. |
# |
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# |
# Init code for application processors. |
# |
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.section K_TEXT_START_2 |
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#ifdef __SMP__ |
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.global ap_boot |
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KTEXT=8 |
KDATA=16 |
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# This piece of code is real-mode and is meant to be alligned at 4K boundary. |
# The requirement for such an alignment comes from MP Specification's STARTUP IPI |
# requirements. |
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.align 4096 |
ap_boot: |
.code16 |
cli |
xorw %ax,%ax |
movw %ax,%ds |
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lgdt gdtr |
movl %cr0,%eax |
orl $1,%eax |
movl %eax,%cr0 |
jmpl $KTEXT,$jump_to_kernel |
jump_to_kernel: |
.code32 |
movw $KDATA,%ax |
movw %ax,%ds |
movw %ax,%es |
movw %ax,%ss |
movl $(ctx-0x80000000),%eax # KA2PA((__address) &ctx) |
movl (%eax),%esp |
subl $0x80000000,%esp # KA2PA(ctx.sp) |
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lidt idtr |
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call map_kernel |
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jmpl $KTEXT,$main_ap |
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#endif /* __SMP__ */ |