additional support routines for boot code
This commit is contained in:
dsl
parent
8e37d38a09
commit
4cf0478777
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@ -0,0 +1,71 @@
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/* $NetBSD: biosgetsystime.S,v 1.1 2003/04/16 13:24:09 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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/* Return system time (~18.2Hz ticks since midnight) */
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ENTRY(biosgetsystime)
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pushl %ebp
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movl %esp, %ebp
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pushl %ebx
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pushl %ecx
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pushl %edx
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push %esi
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push %edi
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call _C_LABEL(prot_to_real) # enter real mode
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.code16
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movb $0, %ah
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int $0x1a
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calll _C_LABEL(real_to_prot) # back to protected mode
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.code32
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mov %ecx, %eax
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shl $16, %eax
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movw %dx, %ax
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pop %edi
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pop %esi
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popl %edx
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popl %ecx
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popl %ebx
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popl %ebp
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ret
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@ -0,0 +1,70 @@
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/* $NetBSD: dump_eax.S,v 1.1 2003/04/16 13:24:09 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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/* This is useful for debugging - although you may need to
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* delete some code to fit it in.
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* %ds:dump_eax_buff must be somewhere it is safe to write 10 bytes.
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*/
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ENTRY(dump_eax)
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.code16
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pusha /* saves bottom 16 bits only! */
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push %es /* allow for %es != %ds */
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push %ds
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pop %es
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movw $dump_eax_buff, %si
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mov %si, %di
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movw $8, %cx
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1: roll $4, %eax
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push %ax
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andb $0x0f, %al
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addb $0x30, %al /* 30..3f - clear AF */
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#if 1 /* 5 bytes to generate real hex... */
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daa /* 30..39, 40..45 */
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addb $0xc0, %al /* f0..f9, 00..05 */
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adcb $0x40, %al /* 30..39, 41..45 */
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#endif
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stosb
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pop %ax
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loop 1b
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movw $0x20, %ax /* space + null */
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stosw
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pop %es
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jmp message_1
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@ -0,0 +1,75 @@
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/* $NetBSD: message.S,v 1.1 2003/04/16 13:24:09 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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/*
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* message: write the error message in %ds:%esi to the console
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*/
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ENTRY(message)
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/*
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* BIOS call "INT 10H Function 0Eh" to write character to console
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* Call with %ah = 0x0e
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* %al = character
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* %bh = page
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* %bl = foreground color
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*/
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.code16
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pusha
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ENTRY(message_1) /* for dump_eax */
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1:
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cld
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lodsb
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testb %al, %al
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jz 2f
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movb $0x0e, %ah
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movw $0x0001, %bx
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int $0x10
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jmp 1b
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2:
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#ifdef MESSAGE_PAUSE
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/* Delay for about 1 second to allow message to be read */
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movb $0x86, %ah
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mov $16, %cx /* about a second */
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int $0x15 /* delay cx:dx usecs */
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#endif
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popa
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ret
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@ -0,0 +1,91 @@
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/* $NetBSD: putstr.S,v 1.1 2003/04/16 13:24:10 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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/*
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* Diagnostic print routines callable from 32bit C code during early
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* parts of the boot process.
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*/
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/*
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* void putstr(const char *)
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*
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* display message on console
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* bugs: message address must be less than 64k
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*/
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.globl _C_LABEL(putstr)
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_C_LABEL(putstr):
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.code32
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movl 4(%esp), %eax
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pusha
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movl %eax, %esi
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call _C_LABEL(prot_to_real)
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.code16
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movl %esi, %eax
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call message
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calll _C_LABEL(real_to_prot)
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.code32
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popa
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ret
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/*
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* void putint(int)
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*
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* display value on console as 8 hex digits followed by a space
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*/
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.globl _C_LABEL(putint)
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_C_LABEL(putint):
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.code32
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movl 4(%esp), %eax
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pusha
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call _C_LABEL(prot_to_real)
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.code16
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call dump_eax
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calll _C_LABEL(real_to_prot)
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.code32
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popa
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ret
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@ -0,0 +1,122 @@
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/* $NetBSD: pvcopy.S,v 1.1 2003/04/16 13:24:10 dsl Exp $ */
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/*-
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* Copyright (c) 2003 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by David Laight.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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||||
* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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||||
* 2. Redistributions in binary form must reproduce the above copyright
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||||
* notice, this list of conditions and the following disclaimer in the
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||||
* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <machine/asm.h>
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/*
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* Routines to copy to/from absolute virtual addresses.
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* Needed because the boot code runs with %ds having a 64k offset
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* whereas Unix runs with a zero offset.
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*
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* These routines are optimised for code space, not execution speed.
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*/
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/*
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* pbzero(void *dst, int cnt)
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* zero absolute virtual memory
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*/
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ENTRY(pbzero)
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.code32
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push %edi
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push %es
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mov 12(%esp),%edi
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mov 16(%esp),%ecx
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mov $flatdataseg, %ax /* selector with offset == 0 */
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mov %ax, %es
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xor %eax,%eax
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cld
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rep
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stosb
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pop %es
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pop %edi
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ret
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/*
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* vpbcopy(const void *src, void *dst, int cnt)
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* Copy to absolute virtual address
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*/
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ENTRY(vpbcopy)
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.code32
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push %esi
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push %edi
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push %es
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mov 16(%esp),%esi
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mov 20(%esp),%edi
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mov 24(%esp),%ecx
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mov $flatdataseg, %ax /* selector with offset == 0 */
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mov %ax, %es
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xor %eax,%eax
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cld
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rep
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movsb
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popl %es
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popl %edi
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popl %esi
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ret
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/*
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* pvbcopy(const void *src, void *dst, int cnt)
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* Copy from absolute virtual address
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*/
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ENTRY(pvbcopy)
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.code32
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push %esi
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push %edi
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push %ds
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mov 16(%esp),%esi
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mov 20(%esp),%edi
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mov 24(%esp),%ecx
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mov $flatdataseg, %ax /* selector with offset == 0 */
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mov %ax, %ds
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xor %eax,%eax
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cld
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rep
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movsb
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popl %ds
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popl %edi
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popl %esi
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ret
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