linux kernel PPC 405GP stucked after running init

[Octavian Purdila]

Hi list,

I am playing with an embedded system based on an IBM PPC 405GP. So far I made 
the kernel boot, but it gets stuck after running the the init process 
(busybox). Any hints?

I notice that ShowRegs does not output anything, and I traced this behavior to 
pt_regs passed as NULL in the serial irq routine. Is this normal? 

Thank you,
tavi

SysRq : Show Regs
SysRq : Show State

                                               sibling
  task             PC      pid father child younger older
busybox       R running     0     1      0     2               (NOTLB)
ksoftirqd/0   S 00000000     0     2      1             3       (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c001a228] ksoftirqd+0xa4/0xc8
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
events/0      S 00000000     0     3      1     4       8     2 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0023a40] worker_thread+0x1fc/0x220
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
khelper       S 00000000     0     4      3             5       (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0023a40] worker_thread+0x1fc/0x220
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
kblockd/0     S 00000000     0     5      3             6     4 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0023a40] worker_thread+0x1fc/0x220
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
pdflush       S 00000000     0     6      3             7     5 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0030f44] __pdflush+0xb0/0x1e4
 [c0031098] pdflush+0x20/0x30
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
pdflush       S 00000000     0     7      3             9     6 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0030f44] __pdflush+0xb0/0x1e4
 [c0031098] pdflush+0x20/0x30
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
aio/0         S 00000000     0     9      3                   7 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c0023a40] worker_thread+0x1fc/0x220
 [c00281e8] kthread+0xb8/0xc0
 [c000594c] kernel_thread+0x44/0x60
kswapd0       S 00000000     0     8      1            10     3 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c00375cc] kswapd+0x84/0xa0
 [c000594c] kernel_thread+0x44/0x60
mtdblockd     S 00000000     0    10      1                   8 (L-TLB)
Call trace:
 [c0005a70] __switch_to+0x48/0x70
 [c00a4928] schedule+0x2e8/0x684
 [c009885c] mtd_blktrans_thread+0x18c/0x1c4
 [c000594c] kernel_thread+0x44/0x60
SysRq : Show Memory
Mem-info:
DMA per-cpu:
cpu 0 hot: low 2, high 6, batch 1
cpu 0 cold: low 0, high 2, batch 1
Normal per-cpu: empty
HighMem per-cpu: empty

Free pages:       14240kB (0kB HighMem)
Active:1 inactive:173 dirty:0 writeback:0 unstable:0 free:3560 slab:57 
mapped:14 pagetables:2
DMA free:14240kB min:512kB low:640kB high:768kB active:4kB inactive:692kB 
present:16384kB pages_scanned:0 all_unreclaimable? no
protections[]: 0 0 0
Normal free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB 
pages_scanned:0 all_unreclaimable? no
protections[]: 0 0 0
HighMem free:0kB min:128kB low:160kB high:192kB active:0kB inactive:0kB 
present:0kB pages_scanned:0 all_unreclaimable? no
protections[]: 0 0 0
DMA: 6*4kB 3*8kB 1*16kB 1*32kB 1*64kB 0*128kB 1*256kB 1*512kB 1*1024kB 
0*2048kB 3*4096kB = 14240kB
Normal: empty
HighMem: empty
Free swap:            0kB
4096 pages of RAM
0 pages of HIGHMEM
3576 free pages
265 reserved pages
14 pages shared
0 pages swap cached