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Added kgzldr for pc98.
crt.s is based on btx.s.
This commit is contained in:
Yoshihiro Takahashi
parent
57aace23d5
commit
8df8626ebd
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=89495
@ -1,5 +1,5 @@
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# $FreeBSD$
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SUBDIR= btx boot0 boot0.5 boot2 libpc98 loader
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SUBDIR= btx boot0 boot0.5 boot2 kgzldr libpc98 loader
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.include <bsd.subdir.mk>
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37
sys/boot/pc98/kgzldr/Makefile
Normal file
37
sys/boot/pc98/kgzldr/Makefile
Normal file
@ -0,0 +1,37 @@
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# $FreeBSD$
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PROG= kgzldr.o
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SRCS= start.s boot.c inflate.c lib.c crt.s sio.s
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CFLAGS= -fno-builtin
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.if ${OBJFORMAT} == aout
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CFLAGS+=-O2
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.else
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CFLAGS+=-Os
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.endif
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CFLAGS+=-DKZIP
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LDFLAGS=-nostdlib -static -r
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NOMAN=
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BINDIR= /usr/lib
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BINMODE=444
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STRIP=
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.PATH: ${.CURDIR}/../../../kern
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.PATH: ${.CURDIR}/../../i386/kgzldr
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AFLAGS+=--defsym PC98=1
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M4?= m4
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M4FLAGS=-DOBJFORMAT=${OBJFORMAT}
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BOOT_COMCONSOLE_PORT?= 0x238
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M4FLAGS+=-DSIOPRT=${BOOT_COMCONSOLE_PORT}
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all: kgzldr.o
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kgzldr.o: ${OBJS}
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${CC} ${LDFLAGS} -o ${.TARGET} ${OBJS}
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.s.o:
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(cd ${.CURDIR}; ${M4} ${M4FLAGS} ../../i386/kgzldr/kgzldr.m4 ${.IMPSRC}) |\
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${AS} ${AFLAGS} -o ${.TARGET}
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.include <bsd.prog.mk>
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118
sys/boot/pc98/kgzldr/crt.s
Normal file
118
sys/boot/pc98/kgzldr/crt.s
Normal file
@ -0,0 +1,118 @@
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#
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# Copyright (c) 1999 Global Technology Associates, Inc.
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# All rights reserved.
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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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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
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# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# From: btx.s 1.10 1999/02/25 16:27:41 rnordier
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# $FreeBSD$
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#
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# Screen defaults and assumptions.
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.`ifdef' PC98
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.set SCR_MAT,0xe1 # Mode/attribute
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.else
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.set SCR_MAT,0x7 # Mode/attribute
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.endif
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.set SCR_COL,0x50 # Columns per row
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.set SCR_ROW,0x19 # Rows per screen
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# BIOS Data Area locations.
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.`ifdef' PC98
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.set BDA_POS,0x53e # Cursor position
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.else
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.set BDA_SCR,0x449 # Video mode
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.set BDA_POS,0x450 # Cursor position
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.endif
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.globl _(crt_putchr)
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# void crt_putchr(int c)
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_(crt_putchr): movb 0x4(%esp,1),%al # Get character
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pusha # Save
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xorl %ecx,%ecx # Zero for loops
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movb $SCR_MAT,%ah # Mode/attribute
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movl $BDA_POS,%ebx # BDA pointer
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movw (%ebx),%dx # Cursor position
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.`ifdef' PC98
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movl $0xa0000,%edi
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.else
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movl $0xb8000,%edi # Regen buffer (color)
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cmpb %ah,BDA_SCR-BDA_POS(%ebx) # Mono mode?
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jne crt_putchr.1 # No
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xorw %di,%di # Regen buffer (mono)
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.endif
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crt_putchr.1: cmpb $0xa,%al # New line?
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je crt_putchr.2 # Yes
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.`ifdef' PC98
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movw %dx,%cx
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movb %al,(%edi,%ecx,1) # Write char
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addl $0x2000,%ecx
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movb %ah,(%edi,%ecx,1) # Write attr
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addw $0x02,%dx
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jmp putchr.3
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putchr.2: movw %dx,%ax
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movb $SCR_COL*2,%dl
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div %dl
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incb %al
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mul %dl
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movw %ax,%dx
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putchr.3: cmpw $SCR_ROW*SCR_COL*2,%dx
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.else
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xchgl %eax,%ecx # Save char
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movb $SCR_COL,%al # Columns per row
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mulb %dh # * row position
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addb %dl,%al # + column
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adcb $0x0,%ah # position
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shll %eax # * 2
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xchgl %eax,%ecx # Swap char, offset
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movw %ax,(%edi,%ecx,1) # Write attr:char
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incl %edx # Bump cursor
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cmpb $SCR_COL,%dl # Beyond row?
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jb crt_putchr.3 # No
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crt_putchr.2: xorb %dl,%dl # Zero column
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incb %dh # Bump row
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crt_putchr.3: cmpb $SCR_ROW,%dh # Beyond screen?
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.endif
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jb crt_putchr.4 # No
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leal 2*SCR_COL(%edi),%esi # New top line
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movw $(SCR_ROW-1)*SCR_COL/2,%cx # Words to move
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rep # Scroll
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movsl # screen
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movb $' ',%al # Space
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.`ifdef' PC98
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xorb %ah,%ah
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.endif
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movb $SCR_COL,%cl # Columns to clear
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rep # Clear
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stosw # line
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.`ifdef' PC98
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movw $(SCR_ROW-1)*SCR_COL*2,%dx
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.else
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movb $SCR_ROW-1,%dh # Bottom line
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.endif
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crt_putchr.4: movw %dx,(%ebx) # Update position
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popa # Restore
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ret # To caller
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