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Posts Tagged ‘Kernel’

AOSP source code back online

October 21st, 2011 No comments
Hi!
As you know, like many other projects the Android Open-Source Project was affected by the recent kernel.org downtime. So, we’re pleased to let you know that the Gingerbread source code is now available again, and AOSP git servers are back online.
Even before the kernel.org downtime, it was clear that AOSP was sometimes taxing kernel.org’s git infrastructure. When we did the Gingerbread source release, for example, load due to AOSP made part of kernel.org unusable for several days. This isn’t fair to kernel.org’s staff or the community, so for some time we’ve been preparing our own git hosting on Google servers.
We were finishing up just as kernel.org experienced their downtime, so the Gingerbread source is now available on Google’s servers. Accordingly, the git URLs have changed.
Here are the instructions to access the new git servers:
There are a few limitations to be aware of:
  • Our priority has been getting the main source code mirrors back online, so for the moment gitweb source browsing and Gerrit Code Review are still unavailable.
  • We are now working on bringing AOSP’s Gerrit Code Review site back up, and hope to be able to say something here soon.
  • It might be a little while longer before gitweb comes back, unfortunately, since Gerrit Code Review is the next priority.
  • To reiterate, these servers contain only the ‘gingerbread’ and ‘master’ branches from the old AOSP servers. We plan to release the source for the recently-announced Ice Cream Sandwich soon, once it’s available on devices.
  • As these new servers are, well, new, there may be hiccups if we encounter unexpected issues. However we’re keeping a close eye on them and will respond to any issues as quickly as possible.
Finally, we’d like to send a huge “thank-you” to the kernel.org community and Oregon State University Open-Source Lab staff. They’ve done an incredible job hosting the AOSP source code mirror and Gerrit Code Review for nearly 3 years. Without them, it’s safe to say that AOSP would not be where we are today.
Thanks, and happy coding!
- Dan
– EOF –
Categories: Android, Kernel, OpenSource Tags: , , , ,

修改Linux Kernel启动画面

June 3rd, 2011 No comments

linux kernel的启动logo存放于KERNEL_PATH/drivers/video/logo/logo_linux_cult224.ppm

是被编译到内核的，所以不能简单的替换就改变原有的logo，按以下命令制作logo_linux_cult224.ppm:


pngtopnm logo.png > logo_linux_cult224.pnm　　　　　　　/*格式转换*/
pnmquant 224 logo_linux_cult224.pnm > logo_linux_cult224.pnm　/*将图像改为224色*/
pnmtopnm logo_linux_cult224.pnm > logo_linux_cult224.ppm　/*将图像转存为ppm格式*/

替换新内核中原有的logo_linux_cult224.ppm，注意备份原有的企鹅logo_linux_cult224.ppm。

内核编译后，且以framebuffer方式启动新内核，此时企鹅图标就变成了自定义的LOGO（注意LOGO图像的尺寸不能大于framebuffer的尺寸）

但是在启动中，logo上会有光标在闪烁，如果需要将光标去除（提示console的光标也会消失），将内核中的KERNEL_PATH/drivers/video/console/fbcon.c中的fb_flashcursor和fbcon_sursor函数体置空。重新编译安装内核即可。

参考: http://www.cnblogs.com/semo/archive/2011/01/05/1926295.html

–EOF–

 

Categories: Kernel, Tech.Notes Tags: , , , , ,

[Kernel] Debian-ubuntu-kernel-install

November 18th, 2009 No comments

第一步 安装必要的工具

首先要安装必要的包。
包有：libncurses5-dev（menuconfig需要的）和essential

sudo apt-get install build-essential kernel-package
sudo apt-get install make
sudo apt-get install gcc

另外，查看系统是否有这样的两个命令

mkinitramfs mkisofs

这两个工具在编译内核时用来生成 *.img文件的。如果没有就需安装。

第二步 下载内核

到www.kernel.org下载新内核到/usr/src

wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.30.5.tar.bz2

我下载的是linux-2.6.30.5.tar.bz2(原来的内核是2.6.24-24-generic)

第三步 编译前的准备

察看当前内核的版本

border@ubuntu:/usr/src$ uname -a
Linux ubuntu 2.6.24-24-generic #1 SMP Tue Jun 30 20:28:53 UTC 2009 i686 GNU/Linux

建议最好下载比当前已安装版本高的内核

解压linux-2.6.30.5.tar.gz到linux-2.6.30.5

cd /usr/src
sudo tar xjvf linux-2.6.30.5.tar.bz2
cd linux-2.6.30.5/


第四步 开始编译

cd /usr/src/linux-2.6.30.5/ //以下所有的工作都在/usr/src/linux-2.6.30.5/下完成

sudo make menuconfig  //用menuconfig的话还需要Ncurses，或者用
sudo make xconfig
sudo make menuconfig  //一般是用menuconfig

配置完以后保存（系统中保存的一份内核配置文件是在/usr/src/linux-2.6.30.5下名为.config,你也可以自己在别的地方另存一份）
也可以cp原来在/boot目录下的config-2.6.xx 到当前目录下，在make menuconfig是使用这个配置文件。

sudo make clean //清除旧数据 ，新解压的内核源码就不需要这一步了
sudo make –j4 可以分四个线程来进行编译工作
sudo make bzImage //编译内核，将保存到/usr/src/linux-2.6.30.5/arch/i386/boot/下
sudo make modules //编译模块
sudo make modules_install //安装模块，执行完后会显示DEPMOD 2.6.30.5
sudo mkinitramfs -o /boot/initrd.img-2.6.30.5 2.6.30.5      // 2.6.30.5为modules_install 执行完成后显示的DEPMOD 2.6.30.5， 注意: 2.6.30.5 前面有空格
sudo make install //安装内核

如果你想把编译的结果打包为Deb包，可以参考这里 和 这里 .

sudo make-kpkg clean
sudo make-kpkg –revision eee701 kernel_image
sudo dpkg -i linux-image-2.6.30_eee701_i386.deb

安装完后/boot下将增加以下几个文件（用ls -l *30*查看）

border@ubuntu:/boot$ ls -l *30*
-rw-r–r– 1 root root   96237 2009-08-25 17:41 config-2.6.30.5
-rw-r–r– 1 root root 7896051 2009-08-25 17:38 initrd.img-2.6.30.5
-rw-r–r– 1 root root 1095789 2009-08-25 17:41 System.map-2.6.30.5
-rw-r–r– 1 root root 2324720 2009-08-25 17:41 vmlinuz-2.6.30.5

给/boot/grub/menu.lst中添加一个新的启动项，如我的menu.lst增加了如下一段文字

title           Ubuntu kernel 2.6.30.5
root            (hd0,0)
kernel          /boot/vmlinuz-2.6.30.5 vga=794 root=/dev/sda1 ro
initrd          /boot/initrd.img-2.6.30.5
quiet


ps: 上面在kernel一行后面的 “vga=794 root=/dev/sda1 ro” 是从你之前的启动项取得的。
重新启动即可。

参考:
1.   http://ubuntuforums.org/showthread.php?t=311158
2.   “creating a kernel 2.6.30 deb file” http://www.naumann.cc/?p=107

–
Bian Jiang
Blog:  http://www.wifihack.net/

Categories: Kernel Tags: , , ,

The Kernel Newbie Corner 系列文章 By: Robert P. J. Day

August 28th, 2009 2 comments

Robert P. J. Day The Kernel Newbie Corner 系列文章

Robert can be reached at rpjday@crashcourse.ca This e-mail address is being protected from spambots. You need JavaScript enabled to view it , and can be followed at http://twitter.com/rpjday.

Last update: 2009.10.9

1. The Kernel Newbie Corner: Your First Loadable Kernel Module

2. The Kernel Newbie Corner: Your First Loadable Kernel Module, Part Deux

3. The Kernel Newbie Corner: Loadable Kernel Modules, Coming and Going

4. The Kernel Newbie Corner: Everything You Wanted to Know About Module Parameters

5. The Kernel Newbie Corner: Building and Running a New Kernel

6. The Kernel Newbie Corner: Kernel Symbols: What’s Available to Your Module, What Isn’t

7. The Kernel Newbie Corner: What’s in That Loadable Module, Anyway?

8. The Kernel Newbie Corner: Kernel and Module Debugging with gdb

9. The Kernel Newbie Corner: Kernel Debugging Using proc “Sequence” Files–Part 1

10. The Kernel Newbie Corner: Kernel Debugging with proc “Sequence” Files–Part 2

11. The Kernel Newbie Corner: Kernel Debugging with proc “Sequence” Files–Part 3

12. The Kernel Newbie Corner: “initrd” and “initramfs”–What’s Up With That?

13. The Kernel Newbie Corner: “initrd” and “initramfs”–Some Unfinished Business

The archive of all “Kernel Newbie Corner” http://linux.com/search/kernel%2Bnewbie%2Bcorner/%252F?ordering=oldest&searchphrase=exact&limit=20

Categories: Kernel Tags: , , , ,

linux-2.6.30 with gcc-3.4.6 compile error

July 20th, 2009 No comments

想通过codeviz看linux kernel的调用关系, 但是codeviz用的是gcc-3.4.6,

但在用gcc-3.4.6编译linux-2.6.30的时候报错:

 drivers/net/igb/igb_main.c: In function `igb_up':
 drivers/net/igb/igb_main.c:130: sorry, unimplemented: inlining failed
 in call to 'igb_set_rah_pool': function body not available
 drivers/net/igb/igb_main.c:938: sorry, unimplemented: called from here
 drivers/net/igb/igb_main.c:133: sorry, unimplemented: inlining failed
 in call to 'igb_set_vmolr': function body not available
 drivers/net/igb/igb_main.c:939: sorry, unimplemented: called from here
 make[3]: *** [drivers/net/igb/igb_main.o] Error 1
 make[2]: *** [drivers/net/igb] Error 2
 make[1]: *** [drivers/net] Error 2
 make: *** [drivers] Error 2
 
 This is CentOS 4.x system.  While using same configuration to compile
 in CentOS 5.x systems with gcc-4.1.2 do not encounter such error and
 my guess is gcc version issue?  Any idea?

Linux-2.6.30 Linux-2.6.30.1使用gcc-3.4.6编译错误补丁:

diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index be48029..adb09d3 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -127,14 +127,48 @@  static void igb_restore_vlan(struct igb_adapter *);
 static void igb_ping_all_vfs(struct igb_adapter *);
 static void igb_msg_task(struct igb_adapter *);
 static int igb_rcv_msg_from_vf(struct igb_adapter *, u32);
-static inline void igb_set_rah_pool(struct e1000_hw *, int , int);
 static void igb_set_mc_list_pools(struct igb_adapter *, int, u16);
 static void igb_vmm_control(struct igb_adapter *);
-static inline void igb_set_vmolr(struct e1000_hw *, int);
-static inline int igb_set_vf_rlpml(struct igb_adapter *, int, int);
 static int igb_set_vf_mac(struct igb_adapter *adapter, int, unsigned char *);
 static void igb_restore_vf_multicasts(struct igb_adapter *adapter);

+static inline void igb_set_vmolr(struct e1000_hw *hw, int vfn)
+{
+	u32 reg_data;
+
+	reg_data = rd32(E1000_VMOLR(vfn));
+	reg_data |= E1000_VMOLR_BAM |	 /* Accept broadcast */
+	            E1000_VMOLR_ROPE |   /* Accept packets matched in UTA */
+	            E1000_VMOLR_ROMPE |  /* Accept packets matched in MTA */
+	            E1000_VMOLR_AUPE |   /* Accept untagged packets */
+	            E1000_VMOLR_STRVLAN; /* Strip vlan tags */
+	wr32(E1000_VMOLR(vfn), reg_data);
+}
+
+static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
+                                 int vfn)
+{
+	struct e1000_hw *hw = &adapter->hw;
+	u32 vmolr;
+
+	vmolr = rd32(E1000_VMOLR(vfn));
+	vmolr &= ~E1000_VMOLR_RLPML_MASK;
+	vmolr |= size | E1000_VMOLR_LPE;
+	wr32(E1000_VMOLR(vfn), vmolr);
+
+	return 0;
+}
+
+static inline void igb_set_rah_pool(struct e1000_hw *hw, int pool, int entry)
+{
+	u32 reg_data;
+
+	reg_data = rd32(E1000_RAH(entry));
+	reg_data &= ~E1000_RAH_POOL_MASK;
+	reg_data |= E1000_RAH_POOL_1 << pool;;
+	wr32(E1000_RAH(entry), reg_data);
+}
+
 #ifdef CONFIG_PM
 static int igb_suspend(struct pci_dev *, pm_message_t);
 static int igb_resume(struct pci_dev *);
@@ -5418,43 +5452,6 @@  static void igb_io_resume(struct pci_dev *pdev)
 	igb_get_hw_control(adapter);
 }

-static inline void igb_set_vmolr(struct e1000_hw *hw, int vfn)
-{
-	u32 reg_data;
-
-	reg_data = rd32(E1000_VMOLR(vfn));
-	reg_data |= E1000_VMOLR_BAM |	 /* Accept broadcast */
-	            E1000_VMOLR_ROPE |   /* Accept packets matched in UTA */
-	            E1000_VMOLR_ROMPE |  /* Accept packets matched in MTA */
-	            E1000_VMOLR_AUPE |   /* Accept untagged packets */
-	            E1000_VMOLR_STRVLAN; /* Strip vlan tags */
-	wr32(E1000_VMOLR(vfn), reg_data);
-}
-
-static inline int igb_set_vf_rlpml(struct igb_adapter *adapter, int size,
-                                 int vfn)
-{
-	struct e1000_hw *hw = &adapter->hw;
-	u32 vmolr;
-
-	vmolr = rd32(E1000_VMOLR(vfn));
-	vmolr &= ~E1000_VMOLR_RLPML_MASK;
-	vmolr |= size | E1000_VMOLR_LPE;
-	wr32(E1000_VMOLR(vfn), vmolr);
-
-	return 0;
-}
-
-static inline void igb_set_rah_pool(struct e1000_hw *hw, int pool, int entry)
-{
-	u32 reg_data;
-
-	reg_data = rd32(E1000_RAH(entry));
-	reg_data &= ~E1000_RAH_POOL_MASK;
-	reg_data |= E1000_RAH_POOL_1 << pool;;
-	wr32(E1000_RAH(entry), reg_data);
-}
-
 static void igb_set_mc_list_pools(struct igb_adapter *adapter,
 				  int entry_count, u16 total_rar_filters)
 {

参考:
1. linux-2.6.30.1 with gcc-3.4.6 compile error http://patchwork.kernel.org/patch/35402/
2. codeviz http://www.csn.ul.ie/~mel/projects/codeviz/
Categories: Kernel Tags: , , ,