0,0 → 1,95 |
# |
# Copyright (C) 2001-2004 Jakub Jermar |
# Copyright (C) 2005-2006 Martin Decky |
# 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. |
# |
|
# |
# Init code for application processors. |
# |
|
#include <arch/boot/boot.h> |
#include <arch/boot/memmap.h> |
#include <arch/mm/page.h> |
#include <arch/pm.h> |
|
.section K_TEXT_START, "ax" |
|
#ifdef CONFIG_SMP |
|
.global unmapped_ap_boot |
|
KTEXT=8 |
KDATA=16 |
|
# 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. |
|
.align 4096 |
unmapped_ap_boot: |
.code16 |
cli |
xorw %ax, %ax |
movw %ax, %ds |
|
lgdtl ap_gdtr # initialize Global Descriptor Table register |
|
movl %cr0, %eax |
orl $1, %eax |
movl %eax, %cr0 # switch to protected mode |
jmpl $KTEXT, $jump_to_kernel - BOOT_OFFSET + AP_BOOT_OFFSET |
|
jump_to_kernel: |
.code32 |
movw $KDATA, %ax |
movw %ax, %ds |
movw %ax, %es |
movw %ax, %ss |
movl $KA2PA(ctx), %eax # KA2PA((uintptr_t) &ctx) |
movl (%eax), %esp |
subl $0x80000000, %esp # KA2PA(ctx.sp) |
|
call map_kernel # map kernel and turn paging on |
|
addl $0x80000000, %esp # PA2KA(ctx.sp) |
|
jmpl $KTEXT, $main_ap |
|
#endif /* CONFIG_SMP */ |
|
|
.section K_DATA_START, "aw", @progbits |
|
#ifdef CONFIG_SMP |
|
.global unmapped_ap_gdtr |
|
unmapped_ap_gdtr: |
.word 0 |
.long 0 |
|
#endif /* CONFIG_SMP */ |