Makin mantap aja nih SE, kaya' nya belajar dari pengalaman terdahulu nih, skrg malah dimanja abis... :)
back to journey from otuex On 9 May 2011 11:00, "Rheza Christian" <rheza.christ...@gmail.com> wrote: > Sebelumnya SE post official guide buat unlock boot loader. Skr costum > kernel? What do you think suhu suhi id-android? > > ------------------------------------------ > > Sony Ericsson blog has posted post on how to build custom kernel....they > also mentioned that they would be monitoring xda forum > > Since the launch of the unlock boot loader site, we have received a lot of > really great feedback. The Sony Ericsson Developer Program wants to continue > to build on this open dialogue with external developers. > > Developers and advanced users can now unlock the boot loader, which is the > first step to be able to flash your own image. Now we have seen quite a few > comments in different forums like the XDA forum, where developers run into > problems when building their own image, and and trying to flash the image > using Fastboot.*With the help of our Master Software Architect, James > Jacobsson, we put together a short article on how to do this. > > Before moving on, we’d like to remind you again*that there is no turning > back when unlocking the boot loader. You may void the warranty of the phone, > and you will not be able to revert the phone to a locked or original state > if you unlock it. > > What is the Linux kernel? > The Xperia™ line of smartphones run on the Android™, the mobile operating > system based on the Linux kernel. Though it is only a small part of the > operating system, the kernel ensures that all other processes in the system > are synchronized to work together properly. > > Why rebuild the kernel?* > Rebuilding the kernel enables end users to make modifications to their > devices that are normally not intended by the device manufacturer, such as > theming the device by changing system icons and removing/modifying system > components.*Please note that*Sony Ericsson is not recommending this. * > > Considerations before building your own kernel and reflashing your device > As mentioned in the beginning of this article, the first step is to unlock > the boot loader. When the boot loader is unlocked, the sensitive data is > removed, such as DRM certificates, and the user partition of the file system > is wiped out. But all other functionality, such as the camera and other > drivers, is left intact. Please note that content, like music files, that > require the DRM certificate will not be accessible any more. But most > importantly, you may void the warranty of your phone if you decide to unlock > it. Aside from the considerations mentioned above, the functionality is > there, just waiting for you to take advantage of it. So, if you’re ready, > here’s how to get started. > > Building the kernel > It takes a few main steps to build the kernel. Below we’ll*show you how to > build a Linux kernel and flash it onto the device. > > Step*A – Download the necessary software > Download the following software to get started: > > The kernel source code can be downloaded from the copyleft archives on Sony > Ericsson Developer World.*You*can use the file > called*3.0.A.2.181_182.tar.bz2*for our*Android™*Gingerbread devices.*This is > the source code for the Linux kernel as used in the Xperia™ PLAY. > The Fastboot client which is part of the Android SDK. This is the standard > Android flashing utility. This allows you to flash the image you are about > to create onto the device. > The Init RAM disk. The initial RAM disk (also known as the initrd) is the > initial filesystem that the kernel will mount and start running processes > off. You can configure the Init RAM disk to grant root access. How you > create or download your own Init RAM disk is beyond the scope of this > article. > The ARM cross-compiler. A cross-compiler is used to build ARM binaries on a > different architecture, such as x86. This allows you to compile software > (such as the kernel) into a format that the device can run. We recommend > getting the CodeSourcery Lite compiler, especially the GNU/Linux variant, as > you’ll need that if you want to build binaries for a full-blown Linux system > on the device later. However, any EABI ARM compiler capable of compiling the > Linux kernel should be enough for this step. > Step*B – Building the kernel > To build the kernel, you first need to*unpack the kernel.*Once you’ve > unpacked the kernel, you need to configure it, and then build it. The > example below is based on you using the file*called*3.0.A.2.181_182.tar.bz2. > > 1.*Go into the kernel directory: > > cd kernel > > 2.*Configure the kernel: > > ARCH=arm CROSS_COMPILE=/opt/arm-2010q1/bin/arm-none-eabi- make > semc_zeus_defconfig > > Note: Replace /opt/arm-2010q1 with where you installed your cross-compiler. > Also, this example is for Xperia™ PLAY. Replace defconfig with the following > values depending on what device you want to configure it for: > > Xperia™ PLAY semc_zeus_defconfig > Xperia™ arc semc_anzu_defconfig > Xperia™ neo semc_hallon_defconfig > 3.*Build the kernel: > > ARCH=arm CROSS_COMPILE=/opt/arm-2010q1/bin/arm-none-eabi- make > > Replace /opt/arm-2010q1 with where you installed your cross-compiler. Once > done, you should*have a compressed kernel-image in arch/arm/boot/zImage. > > Step*C – Getting a RAM disk > The RAM disk is the initial filesystem the kernel will mount before > transferring control to userspace. How you create your own root filesystem > is beyond the scope of this article, but you can use the following > instructions to pack/unpack the file. > > Unpacking (you have ramdisk.img, and want to create a directory of files out > of it): > > gzip -d - < ramdisk.img > cpio -idm > > Packing (You have directory of files, and want to create ramdisk.img from > it): > > find . | cpio --quiet -H newc -o | gzip > ramdisk.img > > Step*D – Assembling the boot.img > Now that we have all the parts we need to create a flashable file. The next > stop is to package the parts. To do this, you’ll need the program mkbootimg, > which is part of the standard Android tree. If you don’t feel like compiling > all of Android to get this tool, it is available to download from various > trusted sites on the Internet. > > Once you have the tool, this is the command to combine your kernel and RAM > disk into a flashable file: > > mkbootimg --base 0x00200000 --kernel kernel/arch/arm/boot/zImage --ramdisk > ramdisk.img -o boot.img > > Step*E – Flashing the file > You should flash the file using Fastboot. If you’ve unlocked the boot loader > on your device, you already have Fastboot. > > 1. To flash the boot.img file, use the following the command: > > fastboot –i 0x0fce flash boot boot.img > > 2. Now, it will prompt you to connect your device. To do so, follow these > simple steps: > > Make sure your device is powered down. > Hold down the Search button (Xperia™ PLAY only) or the Back button (all > other Xperia™ devices). The device’s notification light should shine blue to > confirm it’s in Fastboot mode. > Connect the USB cable. > Flashing should now start and complete. > 3.*As a last step in the process, you need to reboot the device.*You > can*either remove the USB cable and battery to power the device down. If you > prefer, you can instead*issue the following command (either method will > work): > > fastboot –i 0x0fce reboot > > Important information! > Sony Ericsson does not guarantee any support on this, but we will monitor > the Building the Linux kernel for Xperia phones thread on the XDA Developers > forum. However, we cannot guarantee an answer for every question asked in > this forum. > > Additional information for experienced Linux kernel experts > The kernel is pretty standard, all the regular things you’re used to is > there, and available to use. Things that are different are the memory config > and the kernel commandline. The memory config is hardcoded (i.e., ATAGs > aren’t used for this). It’s set in the board-file for your target, such as > kernel/arch/arm/mach-msm/board-semc_zeus.c in the function msm7x30_fixup. > The kernel commandline is also not fetched from the boot.img file, but > compiled into the kernel (CONFIG_CMDLINE). Some arguments are also added > from the boot loader. > > Additional information if porting non-Linux format files to the device > The boot loader will accept any reasonably formatted boot.img file. For > example, at the*Android Kernel Git, you will see the format of the boot.img > file. This allows you to create a boot.img file containing two loadable > files (kernel+ramdisk), which will get loaded into RAM. Once the boot loader > is loaded, it passes*the control to the first instruction of the loaded > kernel image. After*control is passed, the kernel can rely on the data > contained in the RAM disk already being loaded. > > -- > "Indonesian Android Community" Join: http://forum.android.or.id > > =============== > Xperia arc with Mobile BRAVIA Engine > http://www.sonyericsson.com/product/xperiaarc/video/mbe > --------------------- > Unlimited Data XL Mobile Broadband > http://www.xl.co.id/XLInternet/BroadbandInternet > -------------------- > PING'S Mobile - Plaza Semanggi > E-mail: i...@pings-mobile.com Ph. 021-96087100 > -------------------- > i-gadget Store - BEC Bandung > E-mail: a...@i-gadgetstore.com Ph. 0812-21111191 > -------------------- > Toko EceranShop - BEC Bandung > E-mail: wi...@eceranshop.com Ph. 0815-56599888 > =============== > > Aturan Jual/Kloteran ID-Android http://goo.gl/azW7 -- "Indonesian Android Community" Join: http://forum.android.or.id =============== Xperia arc with Mobile BRAVIA Engine http://www.sonyericsson.com/product/xperiaarc/video/mbe --------------------- Unlimited Data XL Mobile Broadband http://www.xl.co.id/XLInternet/BroadbandInternet -------------------- PING'S Mobile - Plaza Semanggi E-mail: i...@pings-mobile.com Ph. 021-96087100 -------------------- i-gadget Store - BEC Bandung E-mail: a...@i-gadgetstore.com Ph. 0812-21111191 -------------------- Toko EceranShop - BEC Bandung E-mail: wi...@eceranshop.com Ph. 0815-56599888 =============== Aturan Jual/Kloteran ID-Android http://goo.gl/azW7
