|author||Jesper Nilsson <firstname.lastname@example.org>||2011-04-12 12:05:19 +0200|
|committer||Jesper Nilsson <email@example.com>||2012-04-03 13:09:18 +0200|
CRIS: Update documentation
Change some broken links, remove obsolete information and add information about the CRISv32 architecture. Signed-off-by: Jesper Nilsson <firstname.lastname@example.org>
Diffstat (limited to 'Documentation/cris')
1 files changed, 31 insertions, 31 deletions
diff --git a/Documentation/cris/README b/Documentation/cris/README
index d9b086869a60..8dbdb1a44429 100644
@@ -1,38 +1,34 @@
-Linux 2.4 on the CRIS architecture
-$Id: README,v 1.7 2001/04/19 12:38:32 bjornw Exp $
+Linux on the CRIS architecture
-This is a port of Linux 2.4 to Axis Communications ETRAX 100LX embedded
-network CPU. For more information about CRIS and ETRAX please see further
+This is a port of Linux to Axis Communications ETRAX 100LX,
+ETRAX FS and ARTPEC-3 embedded network CPUs.
+For more information about CRIS and ETRAX please see further below.
In order to compile this you need a version of gcc with support for the
-ETRAX chip family. Please see this link for more information on how to
+ETRAX chip family. Please see this link for more information on how to
download the compiler and other tools useful when building and booting
software for the ETRAX platform:
-<more specific information should come in this document later>
What is CRIS ?
CRIS is an acronym for 'Code Reduced Instruction Set'. It is the CPU
architecture in Axis Communication AB's range of embedded network CPU's,
-called ETRAX. The latest CPU is called ETRAX 100LX, where LX stands for
-'Linux' because the chip was designed to be a good host for the Linux
The ETRAX 100LX chip
-For reference, please see the press-release:
+For reference, please see the following link:
-The ETRAX 100LX is a 100 MIPS processor with 8kB cache, MMU, and a very broad
-range of built-in interfaces, all with modern scatter/gather DMA.
+The ETRAX 100LX is a 100 MIPS processor with 8kB cache, MMU, and a very broad
+range of built-in interfaces, all with modern scatter/gather DMA.
@@ -51,20 +47,28 @@ I/O interfaces:
* two parallel-ports
* two generic 8-bit ports
- (not all interfaces are available at the same time due to chip pin
+ (not all interfaces are available at the same time due to chip pin
-The previous version of the ETRAX, the ETRAX 100, sits in almost all of
-Axis shipping thin-servers like the Axis 2100 web camera or the ETRAX 100
-developer-board. It lacks an MMU so the Linux we run on that is a version
-of uClinux (Linux 2.0 without MM-support) ported to the CRIS architecture.
-The new Linux 2.4 port has full MM and needs a CPU with an MMU, so it will
-not run on the ETRAX 100.
+ETRAX 100LX is CRISv10 architecture.
+The ETRAX FS and ARTPEC-3 chips
-A version of the Axis developer-board with ETRAX 100LX (running Linux
-2.4) is now available. For more information please see developer.axis.com.
+The ETRAX FS is a 200MHz 32-bit RISC processor with on-chip 16kB
+I-cache and 16kB D-cache and with a wide range of device interfaces
+including multiple high speed serial ports and an integrated USB 1.1 PHY.
+The ARTPEC-3 is a variant of the ETRAX FS with additional IO-units
+used by the Axis Communications network cameras.
+See below link for more information:
+ETRAX FS and ARTPEC-3 are both CRISv32 architectures.
@@ -182,10 +186,6 @@ SwapFree: 0 kB
-rwxr-xr-x 1 342 100 16252 Jan 01 00:00 telnetd
-(All programs are statically linked to the libc at this point - we have not ported the
- shared libraries yet)