Solve mt7620 continuous cycle uboot (LZMA error 1 - must reset board to recover)

1 Hardware platform

         1、   controller ：MT7620（A9 kernel ）

2 software platform

    1、 development environment ：Ubuntu12.04 

    2、SDK Kernel package ：MT7620 SDK Software development package （MediaTek_ApSoC_SDK_4320_20150414.tar.bz2）

    3、 Kernel version ：linux-2.6.36.x

    4、Uboot edition ：U-Boot 1.1.3

3 Function introduction

    use Ralink Of SDK Development kit , Compiled kernel , Previously burned to MT7620 On , It works . later , Compiled kernel , After burning , The development board restarts repeatedly , Has been constantly Uboot, Fall into a dead cycle , Unable to load kernel .

    Error message ：

stream version is not supported, outSize = FFFFFFFF
LZMA ERROR 1 - must RESET board to recover

    The purpose of this paper is to solve this problem .

    Reference documents ：《MTK_APSoC_SDK_User_Manual.pdf》

    Document download path ：http://download.csdn.net/detail/xhoufei2010/9478004

4 Problem analysis

4.1 Error log

U-Boot 1.1.3 (Aug 31 2015 - 17:33:25)

Board: Ralink APSoC DRAM:  256 MB
relocate_code Pointer at: 8ffb8000
enable ephy clock...done. rf reg 29 = 5
SSC disabled.
******************************
Software System Reset Occurred
******************************
spi_wait_nsec: 29 
spi device id: 20 ba 20 10 44 (ba201044)
find flash: MT25QL512AB
raspi_read: from:30000 len:1000 
raspi_read: from:30000 len:1000 
============================================ 
Ralink UBoot Version: 4.3.0.0
-------------------------------------------- 
ASIC 7620_MP (Port5<->None)
DRAM component: 2048 Mbits DDR, width 16
DRAM bus: 16 bit
Total memory: 256 MBytes
Flash component: 16 MBytes NOR Flash
Date:Aug 31 2015  Time:17:33:25
============================================ 
icache: sets:512, ways:4, linesz:32 ,total:65536
dcache: sets:256, ways:4, linesz:32 ,total:32768 

 ##### The CPU freq = 580 MHZ #### 
 estimate memory size =256 Mbytes
raspi_read: from:50000 len:40 
raspi_read: from:850000 len:40 

=================================================
Check image validation:
Image1 Header Magic Number --> OK
Image2 Header Magic Number --> OK
Image1 Header Checksum --> OK
Image2 Header Checksum --> OK
Image1 Data Checksum --> raspi_read: from:50040 len:6634b2 
OK
Image2 Data Checksum --> raspi_read: from:850040 len:663d95 
OK
Image1 Stable Flag --> Stable
Image1 Try Counter --> 3

Image1: OK Image2: OK

=================================================

Please choose the operation: 
   1: Load system code to SDRAM via TFTP. 
   2: Load system code then write to Flash via TFTP. 
   3: Boot system code via Flash (default).
   4: Entr boot command line interface.
   7: Load Boot Loader code then write to Flash via Serial. 
   9: Load Boot Loader code then write to Flash via TFTP. 
 0 
   
3: System Boot system code via Flash.
## Booting image at bc050000 ...
raspi_read: from:50000 len:40 
   Image Name:   Linux Kernel Image
   Image Type:   MIPS Linux Kernel Image (lzma compressed)
   Data Size:    6698162 Bytes =  6.4 MB
   Load Address: 80000000
   Entry Point:  8000c150
raspi_read: from:50040 len:6634b2 
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... 
stream version is not supported, outSize = FFFFFFFF
LZMA ERROR 1 - must RESET board to recover


U-Boot 1.1.3 (Aug 31 2015 - 17:33:25)

Board: Ralink APSoC DRAM:  256 MB
relocate_code Pointer at: 8ffb8000
enable ephy clock...done. rf reg 29 = 5
SSC disabled.
******************************

4.2 Cause analysis

   （1） because Uboot It can start normally , Describe the hardware Flash No problem , Prompt from the error message , It can be seen that ,Uboot Can load normally , however Kernel Unable to load at all , Explain that you can't get from Uboot Jump to Kernel.

    （2） about Uboot Loading kernel , By decompressing the kernel file , Then import . From the wrong phenomenon , The equipment keeps Uboot, There is a problem with decompression , As the log indicates .

    There is no problem with the check value of the kernel , The problem link , Is to decompress the kernel image .

   Verifying Checksum ... OK
   Uncompressing Kernel Image ... 
stream version is not supported, outSize = FFFFFFFF
LZMA ERROR 1 - must RESET board to recover

  （3） From error prompt , It can be seen that , The problem lies in "LZMA" The decompressed problem .

LZMA ERROR 1 - must RESET board to recover

4.3 see LZMA problem

    from Ralink Official 《MTK_APSoC_SDK_User_Manual.pdf》 Manual No 44 Page and 45 page , chapter “5.2 Install LZMA Utility” see LZMA Installation of tools for .

The original text is shown in the figure 4-1 and 4-2 Shown .

chart 4-1 install LZMA

chart 4-2 Set the kernel image compression mode

    From the document , You can see the hint ：LZMA Algorithm , It doesn't reverse （ backward ） compatible , You have to use lzma If version 4.32.0beta3 Tools compress the kernel image , Otherwise, decompression problems will occur .

Notes: lzma algorithm is not backward-compatible, so you have to use this lzma-4.32.0beta3 tool to
compress your kernel image otherwise you will encounter lzma decompression issue.

4.4 see lzma Compression method and version

   4.4.1 Check the kernel compression mode

    Get into source/vendors/Ralink/MT7620/, see Makefile, Among them, the original Makefile, The setting code of compression mode is as follows ：

CUR_DIR = $(shell pwd)
COMP = lzma

image: mkimage
	$(CROSS_COMPILE)objcopy -O binary -R .note -R .comment -S $(ROOTDIR)/$(LINUXDIR)/vmlinux  $(KERNELZ)
	cd $(IMAGEDIR) ; rm -f $(KERNELZ).*; $(COMP) -9 -f -S .$(COMP) $(KERNELZ)

         You can know from the code , The compression method is lzma, And no path is set , Is directly Ubuntu System installed lzma Version and path .

     If you strictly refer to 《MTK_APSoC_SDK_User_Manual.pdf》 Step operation , Naturally, there will be no problem . But if the user installs a new lzma, And the version is higher , Will inevitably appear lzma Version incompatibility problem .

    4.4.2 Check the system lzma edition

    stay ubuntu Next , Enter the command “ lzma -V” Check the system lzma edition , Pictured 4-3 Shown .

 lzma -V

chart 4-3 Check the system lzma edition

    4.4.3 The problem summary

    Uboot Used for "lzma-4.32.0beta3", The kernel image compression tool version is “lzma5.2”, therefore uboot Cannot be compatible with a newer version 5.2, So lead to uboot decompression kernel Failure .

5 Solution

    Modify the kernel's makefile, Make it lzma route , Take the absolute path , Point to “lzma-4.32.0beta3” edition .makefile The path of is “source/vendors/Ralink/MT7620/Makefile”

    

    5.1 increase lzma Macro definition of path

    The original makefile The first 8 That's ok

COMP = lzma

    increase COMP_PATH Macro definition , Point to “lzma-4.32.0beta3” edition , After compiling the tools of this article （ this paper 4.3 Chapter diagram 4-1 Installation method ）, The installation path is ：/opt/lzma-4.32.7/src/lzma, Modified makefile

COMP = lzma
COMP_PATH = /opt/lzma-4.32.7/src/lzma

    

    5.2 Appoint lzma Compression tool path

    take " $(COMP)" It is amended as follows “ $(COMP_PATH)/$(COMP)”, Added absolute path index .

    Before modification makefile：

image: mkimage
	$(CROSS_COMPILE)objcopy -O binary -R .note -R .comment -S $(ROOTDIR)/$(LINUXDIR)/vmlinux  $(KERNELZ)
	cd $(IMAGEDIR) ; rm -f $(KERNELZ).*; $(COMP) -9 -f -S .$(COMP) $(KERNELZ)

    Modified makefile：

image: mkimage
	$(CROSS_COMPILE)objcopy -O binary -R .note -R .comment -S $(ROOTDIR)/$(LINUXDIR)/vmlinux  $(KERNELZ)
	cd $(IMAGEDIR) ; rm -f $(KERNELZ).*; $(COMP_PATH)/$(COMP) -9 -f -S .$(COMP) $(KERNELZ)

6 Verify that the problem is solved

    Burn the newly compiled kernel to the development board , Boot up , Can be normally from uboot Unzip the kernel , And open the kernel , The log is as follows , Explain how to solve the problem .

raspi_read: from:50040 len:663d95 
   Verifying Checksum ... OK
   Uncompressing Kernel Image ... OK
No initrd
## Transferring control to Linux (at address 8000c150) ...
## Giving linux memsize in MB, 256

Starting kernel ...

 怘怘怘怘怘怘怘怘怘怘怘怘怘怘 fffxfffnux version 2.6.36 ([email protected]) (gcc version 4.6.3 (Buildroot 2012.11.1) ) #65 Fri Dec 4 12:17:11 CST 2015

 The CPU feqenuce set to 580 MHz

 MIPS CPU sleep mode enabled.
 PCIE: bypass PCIe DLL.
 PCIE: Elastic buffer control: Add