| 0,0 → 1,113 |
|---|
| # |
| # Copyright (C) 2005 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. |
| # |
| |
| #include <arch/boot/boot.h> |
| |
| .register %g2, #scratch |
| .register %g3, #scratch |
| .register %g6, #scratch |
| .register %g7, #scratch |
| |
| .section K_TEXT_START, "ax" |
| |
| /* |
| * Here is where the kernel is passed control. |
| * The code must be position independent until |
| * the kernel relocates itself to its VMA. |
| */ |
| |
| .global kernel_image_start |
| kernel_image_start: |
| 0: |
| b 1f |
| nop |
| |
| /* |
| * This header forces SILO to load the kernel at 0x4000. |
| * More precisely, SILO will think this is an old version of Linux. |
| */ |
| .ascii "HdrS" |
| .word 0 |
| .half 0 |
| |
| .align 8 |
| |
| 1: |
| flushw ! flush all but the active register window |
| |
| /* |
| * Prepare to copy the kernel image to 4M. |
| */ |
| |
| set LMA, %g1 ! source address |
| set VMA, %g2 ! destination address |
| set hardcoded_ktext_size, %g3 ! link address of hardcoded_ktext_size |
| set hardcoded_kdata_size, %g4 ! link address of hardcoded_kdata_size |
| |
| sub %g3, %g2, %g3 ! offset of hardcoded_ktext_size from the beginning of the load address |
| sub %g4, %g2, %g4 ! offset of hardcoded_kdata_size from the beginning of the load address |
| |
| ldx [%g3 + %g1], %g3 ! hardcoded_ktext_size -> %g3 |
| ldx [%g4 + %g1], %g4 ! hardcoded_kdata_size -> %g4 |
| |
| add %g3, %g4, %g3 ! size of kernel text and data |
| |
| /* |
| * Start copying the kernel from higher addresses towards lower addresses. |
| */ |
| |
| 2: dec %g3 |
| ldub [%g1 + %g3], %g4 |
| stb %g4, [%g2 + %g3] |
| cmp %g3, 0 |
| bnz 2b |
| nop |
| |
| set relocated, %g1 |
| jmp %g1 |
| nop |
| |
| relocated: |
| set ofw, %l0 |
| |
| call ofw_init |
| stx %o4, [%l0] |
| |
| call ofw_init_memmap |
| nop |
| |
| wrpr %r0, 0, %pil |
| |
| call main_bsp |
| nop |
| |
| /* Not reached. */ |
| |
| 2: |
| b 2b |
| nop |