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Linux Kernel 2.4.26-vrs1-pxa1-adsx2 for Xscale

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jlackey

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Posted - 22 Jul 2004 : 16:25:29

Linux 2.4.26-vrs1-pxa1-adsx2

This version

Supports BitsyX, AGX, GCX and VGX boards.

Uses Fast FPE instead of NWFP for faster floating point calculations.

Retries mounting the root file system. This allows the root device to be a USB drive without an initial ramdisk.

Avoids unnecessary root device fscks by setting the time from the RTC during RTC driver initialization.

Includes support for USB Bluetooth devices.

Allows the backlight polarity and intensity to be reversed from the kernel command line.

Sends the “Uncompressing Linux...” message to the console instead of the debug port.

Fixes a rare PXA timer interrupt bug (AKA the "sunspot bug").

Fixes a watchdog timer configuration bug.

Important Warnings and Requirements

Do not use a connector board older than Rev A on the BitsyX.

Do not use this kernel on prototype VGX boards. It only supports Rev A or higher.

Use bootloader Ver 4.12 or later OR use a kernel command line that specifies a larger partition for the zImage.

The precompiled kernels are now bigger than 1MB and no longer fit in the old default zImage partion. Beginning with the 4.12 bootloader, the default zImage partition size has been increased to 1.5M. Also, the new ramdisk root file system based on the Debian Distribution is larger than the old ramdisk partion. This partition has been increased to 5M.

This requirement is applicable for booting from on-board flash and booting from an ATA flash card. [ It shouldn't have mattered when booting form a card. Unfortunately, our older bootloaders limited the zImage size to the size of the zImage
partition even whne the zImage was being read from a card. This limitation has been removed beginning with Ver 4.12. ]

If you have an older bootloader, upgrade to the latest or use a cmdline.txt file to set up the necessary partitioning for the larger kernel. Here is a cmdline.txt file for the BitsyX and here is a cmdline.txt file for all other PXA based boards supported by this version of the kernel. These files contain the new default kernel command line suppiled by the bootloader.

The 'mtdparts' parameters provided in these files specify the size of the partitions. Read the bootloader manual for more information about the kernel command line and cmdline.txt files.

To build the kernel on an x86 linux PC, you must use a cross compiler that supports the Xscale CPU. Do not use the toolchain we provide for 2.4.19 and 2.6.0. That version (gcc 2.95.3) does not support the XScale optimizations specified in the kernel Makefile for ARM systems. Instead, use the one that we used (gcc 3.3.2) to build the precompiled kernels provided below.

Download arm-linux-gcc-3.3.2.tar.bz2 [MD5] originally from the handhelds.org website, untar it in your root directory, and add it to your path.
```
cd /
bzcat arm-linux-gcc-3.3.2.tar.bz2 | tar -x
PATH=/usr/local/arm/3.3.2/bin:$PATH
```

only

Kernel source and patches

linux-2.4.26.tar.bz2 (~30MB)
Download from the link above or from kernel.org and make a base directory.
```
bzcat < linux-2.4.26.tar.bz2 | tar -xf -
```

patch-2.4.26-vrs1.gz (~595kB)
Download from the link above or from arm.linux.org.uk.
Change to the linux directory and apply the patch using patch level "-p1".
```
cd linux-2.4.26
zcat patch-2.4.26-vrs1.gz | patch -p1
```

linux-2.4.26-vrs1-pxa1.patch.gz (~250kB)
Download from the link above or (uncompressed) from Robert Schwebel.
Remain in the linux directory and apply the patch using patch level "-p1".
```
zcat linux-2.4.26-vrs1-pxa1.patch.gz | patch -p1
```

diff-2.4.26-vrs1-pxa1-adsx2.gz (~220kB)
Download from the link above and apply the patch using patch level "-p1".
```
zcat diff-2.4.26-vrs1-pxa1-adsx2.gz | patch -p1
```

Root File System

Root File Systems

Precompiled Kernel Images

BitsyX zImage [MD5]
- LCD (Sharp LQ64D343, 640x480)
- Touch screen
- On-Board Flash
- PCMCIA Interface
- CF Interface (requires CF connector board)
- On-Board Ethernet (requires Ethernet connector board)
- USB Host
- 3 PXA Serials
- Power Management
- CPU Frequency and Voltage Scaling
- ADSmartIO
- AC97 Audio
- Real Time Clock
- Watchdog Timer

AGX zImage [MD5]
- LCD (Sharp LQ64D343, 640x480)
- Touch screen
- PS/2 Keyboard
- On-Board Flash
- PCMCIA Interface
- On-Board Ethernet
- USB Host
- 3 PXA Serials
- 8250 QuadUART
- Power Management
- CPU Frequency and Voltage Scaling
- ADSmartIO
- AC97 Audio
- Real Time Clock
- Watchdog Timer

GCX zImage [MD5]
- LCD (Sharp LQ64D343, 640x480)
- Touch screen
- PS/2 Keyboard
- On-Board Flash
- PCMCIA Interface
- On-Board Ethernet
- 3 PXA Serials
- Power Management
- CPU Frequency and Voltage Scaling
- ADSmartIO
- AC97 Audio
- Real Time Clock
- Watchdog Timer

VGX zImage [MD5]
- LCD (Sharp LQ64D343, 640x480)
- Touch screen
- PS/2 Keyboard
- On-Board Flash
- PCMCIA Interface
- On-Board Ethernet
- USB Host
- 3 PXA Serials
- 8250 QuadUART
- Power Management
- CPU Frequency and Voltage Scaling
- ADSmartIO
- AC97 Audio
- Real Time Clock
- Watchdog Timer

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