/* $OpenBSD: srt0.S,v 1.9 1997/07/18 00:52:09 mickey Exp $ */ /* * Copyright (c) 1997 Michael Shalayeff * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Michael Shalayeff. * 4. 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 REGENTS OR CONTRIBUTORS 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 .globl _C_LABEL(end) .globl _C_LABEL(edata) .globl _C_LABEL(boot) .globl _C_LABEL(_rtt) .globl _ASM_LABEL(pmm_init) .text .globl start start: #ifdef DEBUG movl $0xb80a0, %ebx movl $0x07420742, (%ebx) #endif call _ASM_LABEL(pmm_init) #ifdef DEBUG movl $0xb80a4, %ebx movl $0x07520752, (%ebx) #endif popl %eax cmpl $BOOTMAGIC, %eax je 1f #ifdef DEBUG movl $0xb80a8, %ebx movl $0x4741474d, (%ebx) #endif 1: /* zero .bss */ xorl %eax, %eax movl $_C_LABEL(end), %ecx subl $_C_LABEL(edata),%ecx movl $_C_LABEL(edata), %edi cld rep; stosb call _C_LABEL(boot) jmp _C_LABEL(_rtt)