| 0,0 → 1,76 |
|---|
| # |
| # 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. |
| # |
| |
| # |
| # Init code for application processors. |
| # |
| |
| .section K_TEXT_START_2, "ax" |
| |
| #ifdef CONFIG_SMP |
| |
| .global 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 |
| ap_boot: |
| .code16 |
| cli |
| xorw %ax, %ax |
| movw %ax, %ds |
| |
| lgdt real_bootstrap_gdtr_boot # initialize Global Descriptor Table register |
| |
| movl %cr0, %eax |
| orl $1, %eax |
| movl %eax, %cr0 # switch to protected mode |
| 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) |
| |
| call map_kernel # map kernel and turn paging on |
| |
| addl $0x80000000, %esp # PA2KA(ctx.sp) |
| |
| jmpl $KTEXT, $main_ap |
| |
| #endif /* CONFIG_SMP */ |