unstable-nios2mmu boot error

Hi,

I found the issue. In fact the device-tree generator (sopc2dts : from .sopcinfo to .dts) does not support the version 10.1 of the timer. So I manually modify the timer description in the .dts. But I forgot to add the clock-frequency value, so I got a "NULL pointer error".

The timer description should be :

--- Quote Start ---

//Port data_master of cpu_0

timer_0: timer@0x4842000 {

compatible = "altr,timer-8.0";

reg = < 0x4842000 0x20>;

interrupt-parent = < &cpu_0 >;

clock-frequency = <50000000>;

interrupts = < 0 >;

}; //end unknown (timer_0)

--- Quote End ---

Now I get another issue in the boot process :

--- Quote Start ---

fault during kernel misaligned fixup @ 0xd02157b0; addr 0x00000003; isn=0x20800017

Linux version 2.6.39-rc3-01078-gaf7b9ea-dirty (ben@debian) (gcc version 4.1.2)# 64 Fri May 13 10:56:50 CEST 2011

bootconsole [early0] enabled

early_console initialized at 0xe4842020

On node 0 totalpages: 4096

free_area_init_node: node 0, pgdat d04b2814, node_mem_map d04cd800

DMA zone: 36 pages used for memmap

DMA zone: 0 pages reserved

DMA zone: 4060 pages, LIFO batch:0

pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768

pcpu-alloc: [0] 0

Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4060

Kernel command line:

PID hash table entries: 64 (order: -4, 256 bytes)

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 11272k/4895k RAM (2119k kernel code, 2776k data)

NR_IRQS:32

late time init = d0215b28

Calibrating delay loop... 22.88 BogoMIPS (lpj=45760)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

fault during kernel misaligned fixup @ 0xd02157b0; addr 0x00000003; isn=0x20800017

Linux version 2.6.39-rc3-01078-gaf7b9ea-dirty (ben@debian) (gcc version 4.1.2)# 64 Fri May 13 10:56:50 CEST 2011

bootconsole [early0] enabled

early_console initialized at 0xe4842020

On node 0 totalpages: 4096

free_area_init_node: node 0, pgdat d04b2814, node_mem_map d04cd800

DMA zone: 36 pages used for memmap

DMA zone: 0 pages reserved

DMA zone: 4060 pages, LIFO batch:0

pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768

pcpu-alloc: [0] 0

Built 1 zonelists in Zone order, mobility grouping off. Total pages: 4060

Kernel command line:

PID hash table entries: 64 (order: -4, 256 bytes)

Dentry cache hash table entries: 2048 (order: 1, 8192 bytes)

Inode-cache hash table entries: 1024 (order: 0, 4096 bytes)

Memory available: 11272k/4895k RAM (2119k kernel code, 2776k data)

NR_IRQS:32

late time init = d0215b28

Calibrating delay loop... 22.97 BogoMIPS (lpj=45952)

pid_max: default: 32768 minimum: 301

Mount-cache hash table entries: 512

NET: Registered protocol family 16

bio: create slab <bio-0> at 0

Switching to clocksource timer

NET: Registered protocol family 2

IP route cache hash table entries: 1024 (order: 0, 4096 bytes)

IPv4 FIB: Using LC-trie version 0.409

TCP established hash table entries: 512 (order: 0, 4096 bytes)

TCP bind hash table entries: 512 (order: -1, 2048 bytes)

TCP: Hash tables configured (established 512 bind 512)

TCP reno registered

UDP hash table entries: 256 (order: 0, 4096 bytes)

UDP-Lite hash table entries: 256 (order: 0, 4096 bytes)

NET: Registered protocol family 1

RPC: Registered udp transport module.

RPC: Registered tcp transport module.

RPC: Registered tcp NFSv4.1 backchannel transport module.

[few second to wait here]

JFFS2 version 2.2. (NAND) &#65533;© 2001-2006 Red Hat, Inc.

msgmni has been set to 22

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

[few second to wait here]

ttyAL0 at MMIO 0x4842020 (irq = 2) is a Altera UART

console [ttyAL0] enabled, bootconsole disabled

console [ttyAL0] enabled, bootconsole disabled

dm9000 Ethernet Driver, V1.31

TCP cubic registered

NET: Registered protocol family 17

Oops: Exception in kernel mode, sig: 4

r1: d0c1c000 r2: 00000b0e r3: d0221000 r4: 00000000

r5: 00000000 r6: 00000000 r7: ffffff80 r8: d04d2240

r9: 00000218 r10: d04b28e4 r11: d04d2360 r12: d04d2248

r13: 00000003 r14: ffffffff r15: 00000001

ra: d021647c fp: fffffbff sp: d0c1ded4 gp: 00000000

ea: d0216484 estatus: 00000001

Kernel panic - not syncing: Attempted to kill init!

--- Quote End ---

I will give you feed back if I found this issue

Best regards

Hi zben,

Did you succed to boot the kernel since you posted your message?

I try to use the unstable-nios2mmu branch to use the device tree, but I have a problem. I can't find any linux-2.6/arch/nios2/boards/generic-dts/include/asm/nios.h path to modify the nios.h file....

Did you add this file or it was included in the unstable-nios2mmu branch ?

With the support of device tree, did you tape only "make" in uClinuxDistr or "make path_to_device_tree.dts" in order to compile the kernel?

Thank you for your help.

Best regards.

Pierre

Hi,

Yes I succeed to make it boot, the issues :

- I update the kernel to a too new version

- Same problem to the uClinux-dist directory

so get the latest nios2-linux, then checkout but don't update

For the nios.h I'm not sure to remember (I delete my project) but I think it was in arch/nios2/include/nios.h

I compile using only make, the .dts to use is set in the .config of the kernel

Best regards

PS: If I remember well I have other errors after boot (like no network on the board or something like that, so I decide to wait for this branch be more mature and I return back to the trunk). I explain it in a post but Altera moderator block it...

It's a bit late, but I have possibly found a bug that may provokes this 'fault during kernel misaligned fixup'.

It happens when CONFIG_PASS_CMD_LINE is not set under menuconfig (because the parameter passed to early_init_devtree() is not initialized to be more precise).

However, it has no relationship with the kernel panic that comes later...