57 lines
2.1 KiB
ArmAsm
57 lines
2.1 KiB
ArmAsm
/*
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Copyright (C) 2012, Aaron Lindsay <aaron@aclindsay.com>
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This file is part of Aedrix.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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.global start /* making entry point visible to linker */
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/* setting up the Multiboot header - see GRUB docs for details */
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.set ALIGN, 1<<0 /* align loaded modules on page boundaries */
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.set MEMINFO, 1<<1 /* provide memory map */
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.set FLAGS, ALIGN | MEMINFO /* this is the Multiboot 'flag' field */
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.set MAGIC, 0x1BADB002 /* 'magic number' lets bootloader find the header */
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.set CHECKSUM, -(MAGIC + FLAGS) /* checksum required */
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.align 4
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.long MAGIC
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.long FLAGS
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.long CHECKSUM
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/* reserve initial kernel stack space */
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.set STACKSIZE, 0x4000 /* that is, 16k. */
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.align 32
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.lcomm stack, STACKSIZE /* reserve 16k stack on a doubleword boundary */
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.comm mbd, 4 /* we will use this in i386_main */
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.comm magic, 4 /* we will use this in i386_main */
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start:
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movl $(stack + STACKSIZE), %esp /* set up the stack */
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movl %eax, magic /* Multiboot magic number */
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movl %ebx, mbd /* Multiboot data structure */
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call i386_main /* call kernel proper */
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cli
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hang:
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hlt /* halt machine should kernel return */
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jmp hang
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.globl atags_ptr
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atags_ptr:
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.word 0
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