Wiki source code of barebox

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  1: {{box cssClass="floatinginfobox" title="**Contents**"}}
  2: {{toc/}}
  3: {{/box}}
  4: 
  5: {{info}}
  6: Barebox is a bootloader responsible for hardware initialization, loading and booting linux kernel. It is also used for module flashing.
  7: {{/info}}
  8: 
  9: = Build =
 10: 
 11: == Set toolchain ==
 12: 
 13: {{info}}
 14: Binary files build with Codesourcery toolchain are known to work correctly.
 15: {{/info}}
 16: 
 17: Export [[toolchain variables>>vmx25.toolchain]] for every related terminal session.
 18: 
 19: == Initial steps ==
 20: 
 21: Create working directory
 22: 
 23: {{code language="bash"}}
 24: mkdir -pv ~/workdir/vmx53/barebox/
 25: {{/code}}
 26: 
 27: == Set shell variables ==
 28: 
 29: {{code language="bash"}}
 30: BB_VERSION=2014.03.0
 31: SW_VERSION=20150308
 32: {{/code}}
 33: 
 34: == Download & Extract source code ==
 35: 
 36: {{code language="bash"}}
 37: cd ~/workdir/vmx53/barebox/
 38: wget http://barebox.org/download/barebox-${BB_VERSION}.tar.bz2
 39: tar xvjf barebox-${BB_VERSION}.tar.bz2
 40: mv barebox-${BB_VERSION} barebox-${BB_VERSION}.orig
 41: cp -rv barebox-${BB_VERSION}.orig barebox-${BB_VERSION}.work
 42: {{/code}}
 43: 
 44: == Patch ==
 45: 
 46: {{code language="bash"}}
 47: cd ~/workdir/vmx53/barebox/
 48: wget https://www.voipac.com/downloads/imx/53/src/barebox-${BB_VERSION}_vmx53_${SW_VERSION}.cfg
 49: wget https://www.voipac.com/downloads/imx/53/src/barebox-${BB_VERSION}_vmx53_${SW_VERSION}.patch
 50: cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
 51: patch -p1 < ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.patch
 52: cp ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.cfg .config
 53: {{/code}}
 54: 
 55: == Compile ==
 56: 
 57: {{code language="bash"}}
 58: cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
 59: #make ARCH=arm menuconfig
 60: make -j4
 61: {{/code}}
 62: 
 63: {{info}}
 64: Output file is called arch/arm/pbl/zbarebox.bin
 65: {{/info}}
 66: 
 67: = Configure =
 68: 
 69: == Edit boot options ==
 70: 
 71: By default the barebox has predefined 4 boot configurations:
 72: 
 73: * nand-legacy-ubi
 74: ** Load kernel (nand - kernel)
 75: ** Attach rootfs (nand - rootfs)
 76: * nand-dtb-ubi
 77: ** Load kernel (nand - kernel)
 78: ** Load device tree (nand - bareboxenv)
 79: ** Attach rootfs (nand - rootfs)
 80: * net-legacy
 81: ** Load kernel (tftp)
 82: ** Attach rootfs (nfs)
 83: * net-dtb
 84: ** Load kernel (tftp)
 85: ** Load device tree (tftp)
 86: ** Attach rootfs (nfs)
 87: 
 88: The boot configuration files include option such as kernel and rootfs name and paths (can be edited)
 89: 
 90: {{code language="bash"}}
 91: barebox@Voipac VMX53:/ edit /env/boot/net-dtb
 92: {{/code}}
 93: 
 94: {{code language="bash"}}
 95: barebox@Voipac VMX53:/ edit /env/config
 96: 
 97: # list of boot entries. These are executed in order until one
 98: # succeeds. An entry can be:
 99: # - a filename in /env/boot/
100: # - a full path to a directory. All files in this directory are
101: #   treated as boot files and executed in alphabetical order
102: global.boot.default=nand-dtb-ubi
103: {{/code}}
104: 
105: == Set correct DTB file based on module configuration ==
106: 
107: This is important when booting with Device Tree.
108: 
109: {{code language="bash"}}
110: barebox@Voipac VMX53:/ edit /env/config
111: ...
112: # BASIC=557, PRO=668, MAX=779
113: #global.vmxmodel=557
114: global.vmxmodel=668
115: #global.vmxmodel=779
116: ...
117: barebox@Voipac VMX53:/ saveenv
118: barebox@Voipac VMX53:/ reset
119: {{/code}}
Wiki source code of barebox

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