lkml.org 
[lkml]   [2018]   [Dec]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v1 03/13] powerpc/mm/32s: rework mmu_mapin_ram()
From
Date
Hi Again,

Le 13/12/2018 à 13:16, Christophe Leroy a écrit :
> Hi,
>
> On 12/03/2018 09:55 PM, Jonathan Neuschäfer wrote:
>> Hi,
>>
>> On Thu, Nov 29, 2018 at 07:00:16PM +0000, Christophe Leroy wrote:
>>> This patch reworks mmu_mapin_ram() to be more generic and map as much
>>> blocks as possible. It now supports blocks not starting at address 0.
>>>
>>> It scans DBATs array to find free ones instead of forcing the use of
>>> BAT2 and BAT3.
>>>
>>> Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
>>> ---
>>
>> I've just tested this series on my Wii, and starting from this patch
>> (03/13), it hangs at the following lines of output:
>>
>> [    0.000000] printk: bootconsole [udbg0] enabled
>> [    0.000000] Total memory = 319MB; using 1024kB for hash table (at
>> (ptrval))
>>
>> Before this patch it looks like this and boots to userspace:
>>
>> [    0.000000] printk: bootconsole [udbg0] enabled
>> [    0.000000] Total memory = 319MB; using 1024kB for hash table (at
>> (ptrval))
>> [    0.000000] Linux version 4.20.0-rc5-wii-00022-gfbb911b84755
>> (jn@longitude) (gcc version 8.2.0 (Debian 8.2.0-9)) #1337 PREEMPT Mon
>> Dec 3 21:49:02 CET 2018
>> ug_udbg_init: early -> final
>> usbgecko_udbg: ready
>> [    0.000000] Using wii machine description
>
> Can you tell/provide the .config and dts used ?
>
> You seem to have 319MB RAM wherease arch/powerpc/boot/dts/wii.dts only
> has 88MB Memory:
>
>     memory {
>         device_type = "memory";
>         reg = <0x00000000 0x01800000    /* MEM1 24MB 1T-SRAM */
>                0x10000000 0x04000000>;    /* MEM2 64MB GDDR3 */
>     };

Putting the same description in my mpc832x board DTS and doing a few
hacks to get the WII functions called, I get the following:

[ 0.000000] Top of RAM: 0x14000000, Total RAM: 0x5800000
[ 0.000000] Memory hole size: 232MB
[ 0.000000] Zone ranges:
[ 0.000000] DMA [mem 0x0000000000000000-0x0000000013ffffff]
[ 0.000000] Normal empty
[ 0.000000] Movable zone start for each node
[ 0.000000] Early memory node ranges
[ 0.000000] node 0: [mem 0x0000000000000000-0x00000000017fffff]
[ 0.000000] node 0: [mem 0x0000000010000000-0x0000000013ffffff]
[ 0.000000] Initmem setup node 0 [mem
0x0000000000000000-0x0000000013ffffff]
[ 0.000000] On node 0 totalpages: 22528
[ 0.000000] DMA zone: 640 pages used for memmap
[ 0.000000] DMA zone: 0 pages reserved
[ 0.000000] DMA zone: 22528 pages, LIFO batch:3
[ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists, mobility grouping on. Total pages: 21888
[ 0.000000] Kernel command line: loglevel=7
ip=192.168.2.5:192.168.2.2::255.0
[ 0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536
bytes)
[ 0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes)
[ 0.000000] Memory: 77060K/90112K available (6548K kernel code, 1156K
rwdata,
[ 0.000000] Kernel virtual memory layout:
[ 0.000000] * 0xfffdf000..0xfffff000 : fixmap
[ 0.000000] * 0xfdffd000..0xfe000000 : early ioremap
[ 0.000000] * 0xd5000000..0xfdffd000 : vmalloc & ioremap




root@vgoippro:~# cat /sys/kernel/debug/powerpc/block_address_translation
---[ Instruction Block Address Translation ]---
0: 0xc0000000-0xc0ffffff 0x00000000 Kernel EXEC coherent
1: -
2: 0xc1000000-0xc17fffff 0x01000000 Kernel EXEC coherent
3: -
4: 0xd0000000-0xd3ffffff 0x10000000 Kernel EXEC coherent
5: -
6: -
7: -

---[ Data Block Address Translation ]---
0: 0xc0000000-0xc0ffffff 0x00000000 Kernel RW coherent
1: 0xfffe0000-0xffffffff 0x0d000000 Kernel RW no cache guarded
2: 0xc1000000-0xc17fffff 0x01000000 Kernel RW coherent
3: -
4: 0xd0000000-0xd3ffffff 0x10000000 Kernel RW coherent
5: -
6: -
7: -


Could you please provide the dmesg and
/sys/kernel/debug/powerpc/block_address_translation from before this
patch, so that we can compare and identify the differences if any ?

Thanks
Christophe



>
> Christophe
>
>> ...
>>
>> I've tested at patch 1, 2, 3, 4, and 13, so I don't know if it works
>> somewhere in the middle, but probably not.
>>
>> (And in case you're wondering about the 22 in the version string: Those
>> are mostly patches that give me a serial console.)
>>
>> I'm not sure what is going on, because I haven't looked closely at the
>> patches or tried to debug the problem. If you have some debugging tips,
>> I can try them.
>>
>>
>> Jonathan Neuschäfer
>>

\
 
 \ /
  Last update: 2018-12-13 15:52    [W:0.086 / U:8.620 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site