preploader (re:Linux-2.1.129 boot on MCP750)

[Matt Porter]

On Tue, 15 Dec 1998, Gabriel Paubert wrote:

> usual site: 
> 
> 	ftp://vcorr1.iram.es/pub/preploader.tgz
> 
> ands the corresponding 2.1.130 zImage with builtin de4x5 and ncr53c8xx
> drivers (ext2 and nfs filesystems but no root on NFS). This kernel also
> includes support for OpenPIC on Raven machines.
> 
> I would like to have as many reports as possible, both from failures and
> successes. 

Ok, here is my success report:

Tested on MVME230x,2300SC,2400,260x,2700, and 3600 as well as MTX.
Everything appears to be detected properly as with my hacked version of
the arch/ppc/boot/ code. I didn't bother trying to root to something since
that should work as before.

I'm including two patches which provide for some general cleanup, cross
compilation support, and inclusion into the arch/ppc/ tree.  The first
patch to arch/ppc/Makefile enables building in the arch/ppc/prepboot
directory.  The second patch is to be applied to the current
preploader.tgz and then the resultant directory should be placed in
arch/ppc/ and name 'prepboot'.  Doing the usual build routine will then
also build a zImage with the alternative prep loader.

This should not break anything to put the alternative prep loader into CVS
so if Cort is happy with this then I can provide one diff versus current
CVS to make inclusion easy.

Oh, and I've made a local copy of preploader.tgz available at
http://members.home.net/mmporter/linux.html for anyone else in the
states that might have the same kind of bandwidth problems I had going to
Gabriel's ftp server (took me 30+ minutes to get the 90k file).

...patches follow...

--- linux.orig/arch/ppc/Makefile	Tue Dec 15 11:02:20 1998
+++ linux/arch/ppc/Makefile	Tue Dec 15 11:08:09 1998
@@ -45,6 +45,7 @@
 MAKEBOOT = $(MAKE) -C arch/$(ARCH)/boot
 MAKECOFFBOOT = $(MAKE) -C arch/$(ARCH)/coffboot
 MAKECHRPBOOT = $(MAKE) -C arch/$(ARCH)/chrpboot
+MAKEPREPBOOT = $(MAKE) -C arch/$(ARCH)/prepboot
 
 ifdef CONFIG_8xx
 SUBDIRS += arch/ppc/8xx_io
@@ -67,6 +68,7 @@
 	@$(MAKECOFFBOOT) $@
 	@$(MAKEBOOT) $@
 	@$(MAKECHRPBOOT) $@
+	@$(MAKEPREPBOOT) $@
 
 pmac_config:
 	rm -f .config arch/ppc/defconfig
@@ -100,6 +102,7 @@
 	@$(MAKECOFFBOOT) clean
 	@$(MAKEBOOT) clean
 	@$(MAKECHRPBOOT) clean
+	@$(MAKEPREPBOOT) clean
 
 archmrproper:

....preploader patch....

diff -urN preploader/Makefile prepboot/Makefile
--- preploader/Makefile	Mon Dec 14 09:06:15 1998
+++ prepboot/Makefile	Tue Dec 15 12:56:10 1998
@@ -1,5 +1,5 @@
 #
-# arch/ppc/boot/Makefile
+# arch/ppc/prepboot/Makefile
 #
 # This file is subject to the terms and conditions of the GNU General Public
 # License.  See the file "COPYING" in the main directory of this archive
@@ -10,12 +10,10 @@
 # modified by Cort (cort at cs.nmt.edu)
 # revised for PreP boot by Gabriel Paubert (paubert at iram.es)
 
-
 # I tried to use r2 for the basic structure but it seems to be incompatible
 # with the -m relocatable option.
-INCPATH		= /usr/src/linux/arch/ppc/boot
+
 ASFLAGS		= -mrelocatable
-CFLAGSINC	= -D__KERNEL__ -I/usr/src/linux/include -D__powerpc__
 CFLAGS		:= $(CFLAGS) -D__powerpc__ -msoft-float -pipe \
 		-fno-builtin -Wall -mmultiple -mstring -I$(INCPATH)\
 		-D__KERNEL__ -O2 -fomit-frame-pointer \
@@ -60,20 +58,23 @@
 #OBJECTS += vreset.o kbd.o
 
 zImage: $(OBJECTS) $(IMAGES) $(SIZES) ppcboot.lds
-	ld -o zImage $(OBJECTS) -b binary $(IMAGES) -T ppcboot.lds \
-	--defsym _vmlinux_size=`cut -f 1 <.vmlinux.size` -Map zImage.map
+	$(CROSS_COMPILE)ld -o zImage $(OBJECTS) -b binary $(IMAGES) \
+	-T ppcboot.lds --defsym _vmlinux_size=`cut -f 1 <.vmlinux.size` \
+	-Map zImage.map
 
 # The 2 objcopy are quite ugly, but for now it was the simplest solution
 # since the flags to expand the bss do not work on a binary output format.
 # It would be better to know where the bss is and clear it in the bootloader,
 # but the resulting vmlinux.gz expansion is  257 bytes, so it's not so bad.
-vmlinux.gz .vmlinux.size: /usr/src/linux/vmlinux
-	objcopy /usr/src/linux/vmlinux -S vmlinux -R .comment \
-		--set-section-flags=.bss=alloc,load,data
-	objcopy vmlinux vmlinux -O binary
+vmlinux.gz .vmlinux.size: /usr/local/src/ppc/linux/vmlinux
+	$(CROSS_COMPILE)objcopy /usr/local/src/ppc/linux/vmlinux -S vmlinux \
+	-R .comment --set-section-flags=.bss=alloc,load,data
+	$(CROSS_COMPILE)objcopy vmlinux vmlinux -O binary
 	du --bytes vmlinux >.vmlinux.size
 	gzip -vf9 vmlinux
 
 .depend dep:
 	$(CPP) -M *.S *.c -I$(INCPATH) > .depend
 
+clean:
+	rm -f *.o vmlinux* zImage*
diff -urN preploader/zlib.c prepboot/zlib.c
--- preploader/zlib.c	Tue Sep  1 04:49:30 1998
+++ prepboot/zlib.c	Tue Dec 15 12:56:10 1998
@@ -80,7 +80,7 @@
 
          /* functions */
 
-#include <string.h>
+#include <linux/string.h>
 #define zmemcpy memcpy
 #define zmemzero(dest, len)	memset(dest, 0, len)

--
Matt Porter
mmporter at home.com
Unix is a Linux-like operating system.


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