FAQ: [#6047] Kernel can not wake up from mem in latest trunk(2010)

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[#6047] Kernel can not wake up from mem in latest trunk

Submitted By: Vivi Li

Open Date

2010-05-31 00:12:45     Close Date

2010-06-23 06:08:52

Priority:

Medium     Assignee:

Michael Hennerich

Status:

Closed     Fixed In Release:

N/A

Found In Release:

2010R1     Release:

Category:

Drivers     Board:

N/A

Processor:

ALL     Silicon Revision:

Is this bug repeatable?:

Yes     Resolution:

Fixed

Uboot version or rev.:

    Toolchain version or rev.:

trunk-2010_Apr_07

App binary format:

N/A     

Summary: Kernel can not wake up from mem in latest trunk

Details:

 

Kernel can not wake up from mem. Standby mode is OK.

 

Last passed version:

--

kernel:    Linux release 2.6.34-ADI-2010R1-pre-svn8855, build #127 Thu May 27 20:01:42 GMT 2010

toolchain: bfin-uclinux-gcc release gcc version 4.3.4 (ADI-trunk/svn-3951)

user-dist: release svn-9648, build #1464 Thu May 27 20:00:25 GMT 2010

--

 

First failed version:

--

kernel:    Linux release 2.6.34-ADI-2010R1-pre-svn8860, build #131 Sat May 29 02:51:28 GMT 2010

toolchain: bfin-uclinux-gcc release gcc version 4.3.4 (ADI-trunk/svn-3951)

user-dist: release svn-9649, build #1548 Sat May 29 02:50:23 GMT 2010

--

 

Bellow is the log:

--

Linux version 2.6.34-ADI-2010R1-pre-svn8862 (test@uclinux58-mmc-usblan-btuart) (gcc version 4.3.4 (ADI-trunk/svn-3951) ) #135 Su0

register early platform devices

bootconsole [early_shadow0] enabled

bootconsole [early_BFuart0] enabled

early printk enabled on early_BFuart0

Limiting kernel memory to 56MB due to anomaly 05000263

Board Memory: 64MB

Kernel Managed Memory: 64MB

Memory map:

  fixedcode = 0x00000400-0x00000490

  text      = 0x00001000-0x00117c68

  rodata    = 0x00117c68-0x001764e0

  bss       = 0x00177000-0x001875e0

  data      = 0x001875e0-0x0019a000

    stack   = 0x00198000-0x0019a000

  init      = 0x0019a000-0x007ef000

  available = 0x007ef000-0x03800000

  DMA Zone  = 0x03f00000-0x04000000

Hardware Trace Active and Enabled

Boot Mode: 0

Blackfin support (C) 2004-2010 Analog Devices, Inc.

Compiled for ADSP-BF537 Rev 0.2

Blackfin Linux support by http://blackfin.uclinux.org/

Processor Speed: 500 MHz core clock and 125 MHz System Clock

NOMPU: setting up cplb tables

Instruction Cache Enabled for CPU0

  External memory: cacheable in instruction cache

Data Cache Enabled for CPU0

  External memory: cacheable (write-back) in data cache

Built 1 zonelists in Zone order, mobility grouping off.  Total pages: 14224

Kernel command line: root=/dev/mtdblock0 rw clkin_hz=25000000 earlyprintk=serial,uart0,57600 console=ttyBF0,57600 ip=10.100.4.50f

PID hash table entries: 256 (order: -2, 1024 bytes)

Dentry cache hash table entries: 8192 (order: 3, 32768 bytes)

Inode-cache hash table entries: 4096 (order: 2, 16384 bytes)

Memory available: 48652k/65536k RAM, (6484k init code, 1115k kernel code, 521k data, 1024k dma, 7740k reserved)

Hierarchical RCU implementation.

NR_IRQS:138

Configuring Blackfin Priority Driven Interrupts

console [ttyBF0] enabled, bootconsole disabled

console [ttyBF0] enabled, bootconsole disabled

Calibrating delay loop... 995.32 BogoMIPS (lpj=1990656)

Security Framework initialized

Mount-cache hash table entries: 512

Blackfin Scratchpad data SRAM: 4 KB

Blackfin L1 Data A SRAM: 16 KB (16 KB free)

Blackfin L1 Data B SRAM: 16 KB (16 KB free)

Blackfin L1 Instruction SRAM: 48 KB (35 KB free)

NET: Registered protocol family 16

Blackfin DMA Controller

stamp_init(): registering device resources

bio: create slab <bio-0> at 0

Switching to clocksource bfin_cs_cycles

NET: Registered protocol family 2

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

TCP established hash table entries: 2048 (order: 2, 16384 bytes)

TCP bind hash table entries: 2048 (order: 1, 8192 bytes)

TCP: Hash tables configured (established 2048 bind 2048)

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

msgmni has been set to 95

io scheduler noop registered

io scheduler cfq registered (default)

bfin-uart: Blackfin serial driver

bfin-uart.0: ttyBF0 at MMIO 0xffc00400 (irq = 18) is a BFIN-UART

brd: module loaded

bfin_mii_bus: probed

bfin_mac: attached PHY driver [SMSC LAN83C185] (mii_bus:phy_addr=0:01, irq=-1, mdc_clk=2500000Hz(mdc_div=24)@sclk=125MHz)

bfin_mac bfin_mac.0: Blackfin on-chip Ethernet MAC driver, Version 1.1

rtc-bfin rtc-bfin: rtc core: registered rtc-bfin as rtc0

bfin-wdt: initialized: timeout=20 sec (nowayout=0)

TCP cubic registered

NET: Registered protocol family 17

IP-Config: Complete:etting system clock to 2014-11-12 14:38:36 UTC (1415803116)

     device=eth0, addr=10.100.4.50, mask=255.255.255.0, gw=10.100.4.174,

     host=bf537-stamp, domain=, nis-domain=(none),

     bootserver=10.100.4.174, rootserver=10.100.4.174, rootpath=

dma_alloc_init: dma_page @ 0x02850000 - 256 pages at 0x03f00000

Freeing unused kernel memory: 6484k freed

                           _____________________________________

        a8888b.           / Welcome to the uClinux distribution \

       d888888b.         /       _     _                         \

       8P"YP"Y88        /       | |   |_|            __  __ (TM)  |

       8|o||o|88  _____/        | |    _ ____  _   _ \ \/ /       |

       8'    .88       \        | |   | |  _ \| | | | \  /        |

       8`._.' Y8.       \       | |__ | | | | | |_| | /  \        |

      d/      `8b.       \      \____||_|_| |_|\____|/_/\_\       |

     dP   .    Y8b.       \   For embedded processors including   |

    d8:'  "  `::88b        \    the Analog Devices Blackfin      /

   d8"         'Y88b        \___________________________________/

  :8P    '      :888

   8a.   :     _a88P         For further information, check out:

._/"Yaa_:   .| 88P|            - http://blackfin.uclinux.org/

\    YP"    `| 8P  `.          - http://docs.blackfin.uclinux.org/

/     \.___.d|    .'           - http://www.uclinux.org/

`--..__)8888P`._.'  jgs/a:f    - http://www.analog.com/blackfin

 

Have a lot of fun...

 

 

BusyBox v1.16.1 (2010-05-30 09:37:25 GMT) hush - the humble shell

 

root:/> PHY: 0:01 - Link is Up - 100/Full

 

root:/>

root:/>

root:/> rtcwake -s 10 -m mem

wakeup from "mem" at Wed Nov 12 14:38:53 2014

PM: Syncing filesystems ... done.

Freezing user space processes ... (elapsed 0.01 seconds) done.

Freezing remaining freezable tasks ... (elapsed 0.01 seconds) done.

Suspending console(s) (use no_console_suspend to debug)

--

 

Follow-ups

 

--- Michael Hennerich                                        2010-06-16 04:37:49

This bug is caused by commit svn:8859 => 8860 (bfin: allow cache funcs to be

in L1 for anomaly 491)

The resume code restores L1 content in bf53x_resume_l1_mem().

It therefore uses dma_memcpy().

However dma_memcpy() calls blackfin_dcache_flush_range() which is also in L1,

but not present.

 

Since caches are off while this happens, a solution is to provide a

dma_memcpy() that doesn't do flush/invalidate.

early_dma_memcpy() could be an option however it is marked __init section.

 

Mike what do you think?

 

--- Michael Hennerich                                        2010-06-16 05:10:57

New function dma_memcpy_nocache()

Fixed on svn trunk.

 

--- Vivi Li                                                  2010-06-23 06:06:06

OK. Close it.

 

 

 

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File Name     File Type     File Size     Posted By

config.power    application/octet-stream    35782    Vivi Li

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