Preventing the Kernel from changing real-base and load-base
Hi,
a few month ago I posted about not being able to netboot a RS/6000 Model 7025-F50. It turned out to be a problem with the arpd of my server, so I changed the configuration on my server according to a FAQ mentioned in one of the replies. Due to some private issues I haven't been able to work on the machine any further, but I'm still not able to boot into Debian/Linux...
When I look at the output of the boot process, I notice one reboot because the Linux Kernel changes two FW-Settings, real-base and load-base. But the 2nd boot process dies with a DEFAULT CATCH (please see the attached logfile). Obviously the new settings are not useable on my machine, because every OS dies upon startup, this includes a currently installed AIX 4.3.3. Changing the values back to their original values made the system bootable again.
Is there any chance to prevent the Linux-Kernel from changing these variables, or to set two values that won't render the system useless?
Oh, I nearly forgot: I tried several initrds from http://people.debian.org/~luther/d-i, the last one was the daily build 2005-03-25. (Well, this one got stuck in a reboot-loop, with "CLAIM failed").
Bye,
Christian Walther
The output of the boot process is:
0 > boot net
R = 1 BOOTP S = 1
Packet counts = 6484
INIT-PROGRAM: ELF-LOADER
Endian mode : Load Address = 500000
signature 0x7f454c46 : 7f454c46
class 0x01 : 1
ei_data 0x01 : 2
ei_version 0x01 : 1
type 0x0002 : 2
machine 0x0014 : 14
version 0x00000001 : 1
entry 0x02001b40 : 400060
phoff 0x00000034 : 34
shoff 0x000180f4 : 32903c
flags 0x00000000 : 0
ehsize 0x00000034 : 34
phentsize 0x00000020 : 20
phnum 0x00000002 : 3
shentsize 0x00000028 : 28
shnum 0x0000000a : 8
shstrndx 0x00000008 : 5
elf-real-mode:ffffffff
elf-real-base:c00000
elf-real-size:ffffffff
elf-virt-base:ffffffff
elf-virt-size:ffffffff
elf-load-base:4000
RESETing to change Configuration!
boot netR = 1 BOOTP S = 1
Packet counts = 6484 INIT-PROGRAM: ELF-LOADER
Endian mode : Load Address = 4000
signature 0x7f454c46 : 7f454c46
class 0x01 : 1
ei_data 0x01 : 2
ei_version 0x01 : 1
type 0x0002 : 2
machine 0x0014 : 14
version 0x00000001 : 1
entry 0x02001b40 : 400060
phoff 0x00000034 : 34
shoff 0x000180f4 : 32903c
flags 0x00000000 : 0
ehsize 0x00000034 : 34
phentsize 0x00000020 : 20
phnum 0x00000002 : 3
shentsize 0x00000028 : 28
shnum 0x0000000a : 8
shstrndx 0x00000008 : 5
elf-real-mode:ffffffff
elf-real-base:c00000
elf-real-size:ffffffff
elf-virt-base:ffffffff
elf-virt-size:ffffffff
elf-load-base:4000
Number of program headers : 3
pheader # 1 -------------------------------------
type = PT_LOAD
offset = 10000
vaddr = 400000
paddr = 14000
filesz = 319000
memsz = 33a5e8
flags = 7
align = 10000
about to $sync-cache ... ... done with $sync-cache
pheader # 2 -------------------------------------
type = unknown type of Program Header in ELF file
offset = 0
vaddr = 0
paddr = 0
filesz = 0
memsz = 0
flags = 7
align = 4
pheader # 3 -------------------------------------
type = PT_NOTE
offset = 94
vaddr = 0
paddr = 0
filesz = 2c
memsz = 0
flags = 0
align = 0
exiting ELF section
exit INIT-PROGRAM: ELF-LOADER
chrpboot starting: loaded at 0x00400000
initial ramdisk moving 0x3e89000 <- 0x005a2000 (176836 bytes)
gunzipping (0x00010000 <- 0x00406c64:0x005a14fe)...
DEFAULT CATCH!, code=fff00200 at %SRR0: 00400948 %SRR1: 0004b000
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