Hi,
I wiped the dust out of my good-old uCsimm device and tried to
update it with a recent kernel. I built the toolchain (gcc 4.1.2,
binutils 2.16), downloaded the uClinux-dist-20070130 and upgraded
it with 2.6.22-uc0-big sources which seemed to be the most
promising ones (it compiled with some minor configuration tuning
and some patches).
First I needed a modification to uCsimm Makefile in order
avoid >200 MB images:
--- uClinux-dist.orig/vendors/Arcturus/uCsimm/Makefile 2006-06-28
+++ uClinux-dist/vendors/Arcturus/uCsimm/Makefile 2007-11-22
@@ -80,13 +80,11 @@
image:
[ -d $(IMAGEDIR) ] || mkdir -p $(IMAGEDIR)
genromfs -v -V "ROMdisk" -f $(ROMFSIMG) -d $(ROMFSDIR)
- $(CROSS_COMPILE)objcopy -O binary --remove-section=.romvec \
- --remove-section=.text --remove-section=.ramvec \
- --remove-section=.bss --remove-section=.eram \
+ $(CROSS_COMPILE)objcopy -O binary \
+ -j .data -j .init \
$(ROOTDIR)/$(LINUXDIR)/linux
$(IMAGEDIR)/linux.data
- $(CROSS_COMPILE)objcopy -O binary --remove-section=.ramvec \
- --remove-section=.bss --remove-section=.data \
- --remove-section=.eram \
+ $(CROSS_COMPILE)objcopy -O binary \
+ -j .romvec -j .text \
Then a small modification to head-rom.S so that also the .init section
gets copied to RAM:
--- uClinux-dist.orig/linux-2.6.x/arch/m68knommu/platform/68328/head-rom.S
2007-07-09 02:32:17.000000000 +0300
+++ uClinux-dist/linux-2.6.x/arch/m68knommu/platform/68328/head-rom.S
2007-11-22 14:44:16.000000000 +0200
@@ -57,7 +57,7 @@
/* Copy data segment from ROM to RAM */
moveal #_etext, %a0
moveal #_sdata, %a1
- moveal #_edata, %a2
+ moveal #__init_end, %a2
/* Copy %a0 to %a1 until %a1 == %a2 */
1: movel [EMAIL PROTECTED], [EMAIL PROTECTED]
After this I got a nice little kernel which starts booting, but fails
(303ae is in init_idle):
access fault
PC[000303ae] SSP[0002dfa6] USP[f9ffeffd] BootstrapSP[0001ffb6]
D0 D1 D2 D3 D4 D5 D6 D7
0098963a 269b4800 0000000a 007fffec 00000000 0000001b ffffefea 7f9bffff
A0 A1 A2 A3 A4 A5 A6
0097ff68 00039ea0 42b90002 00039a28 00000002 000008ee 0002dfb8
Before I dig into this problem, does anyone have an idea, how big task
would it be to bring 68EZ328 back into life? And/or which was the latest
kernel that worked?
The .config, patches and the compiled kernel image can be downloaded from:
http://www.willab.fi/~jko/ucsimm-kernel-2.6.22-uc0.tar.bz2
Cheers,
Jari
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