commit
e47043aea3853a74a9aa5726a1faa916d7462ab7 upstream.
The OpenBlocks AX3-4 has a non-DT bootloader. It also comes with 1GB of
soldered on RAM, and a DIMM slot for expansion.
Unfortunately, atags_to_fdt() doesn't work in big-endian mode, so we see
the following failure when attempting to boot a big-endian kernel:
686 slab pages
17 pages shared
0 pages swap cached
[ pid ] uid tgid total_vm rss nr_ptes swapents oom_score_adj name
Kernel panic - not syncing: Out of memory and no killable processes...
CPU: 1 PID: 351 Comm: kworker/u4:0 Not tainted 3.15.0-rc8-next-
20140603 #1
[<
c0215a54>] (unwind_backtrace) from [<
c021160c>] (show_stack+0x10/0x14)
[<
c021160c>] (show_stack) from [<
c0802500>] (dump_stack+0x78/0x94)
[<
c0802500>] (dump_stack) from [<
c0800068>] (panic+0x90/0x21c)
[<
c0800068>] (panic) from [<
c02b5704>] (out_of_memory+0x320/0x340)
[<
c02b5704>] (out_of_memory) from [<
c02b93a0>] (__alloc_pages_nodemask+0x874/0x930)
[<
c02b93a0>] (__alloc_pages_nodemask) from [<
c02d446c>] (handle_mm_fault+0x744/0x96c)
[<
c02d446c>] (handle_mm_fault) from [<
c02cf250>] (__get_user_pages+0xd0/0x4c0)
[<
c02cf250>] (__get_user_pages) from [<
c02f3598>] (get_arg_page+0x54/0xbc)
[<
c02f3598>] (get_arg_page) from [<
c02f3878>] (copy_strings+0x278/0x29c)
[<
c02f3878>] (copy_strings) from [<
c02f38bc>] (copy_strings_kernel+0x20/0x28)
[<
c02f38bc>] (copy_strings_kernel) from [<
c02f4f1c>] (do_execve+0x3a8/0x4c8)
[<
c02f4f1c>] (do_execve) from [<
c025ac10>] (____call_usermodehelper+0x15c/0x194)
[<
c025ac10>] (____call_usermodehelper) from [<
c020e9b8>] (ret_from_fork+0x14/0x3c)
CPU0: stopping
CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.15.0-rc8-next-
20140603 #1
[<
c0215a54>] (unwind_backtrace) from [<
c021160c>] (show_stack+0x10/0x14)
[<
c021160c>] (show_stack) from [<
c0802500>] (dump_stack+0x78/0x94)
[<
c0802500>] (dump_stack) from [<
c021429c>] (handle_IPI+0x138/0x174)
[<
c021429c>] (handle_IPI) from [<
c02087f0>] (armada_370_xp_handle_irq+0xb0/0xcc)
[<
c02087f0>] (armada_370_xp_handle_irq) from [<
c0212100>] (__irq_svc+0x40/0x50)
Exception stack(0xc0b6bf68 to 0xc0b6bfb0)
bf60:
e9fad598 00000000 00f509a3 00000000 c0b6a000 c0b724c4
bf80:
c0b72458 c0b6a000 00000000 00000000 c0b66da0 c0b6a000 00000000 c0b6bfb0
bfa0:
c027bb94 c027bb24 60000313 ffffffff
[<
c0212100>] (__irq_svc) from [<
c027bb24>] (cpu_startup_entry+0x54/0x214)
[<
c027bb24>] (cpu_startup_entry) from [<
c0ac5b30>] (start_kernel+0x318/0x37c)
[<
c0ac5b30>] (start_kernel) from [<
00208078>] (0x208078)
---[ end Kernel panic - not syncing: Out of memory and no killable processes...
A similar failure will also occur if ARM_ATAG_DTB_COMPAT isn't selected.
Fix this by setting a sane default (1 GB) in the dts file.
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Tested-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>