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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-25 19:30:35 +0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-25 19:30:35 +0400 |
commit | 4b7eba49c5912cbd7c70bbebec38d8cd54c2ef85 (patch) | |
tree | 99cc41c06ade46f9925268728417c9529ce5041e /Documentation | |
parent | 92bf3d09410531a06e06504957271e3978f937e2 (diff) | |
parent | 7b91747d42a1012e3781dd09fa638d113809e3fd (diff) | |
download | linux-4b7eba49c5912cbd7c70bbebec38d8cd54c2ef85.tar.xz |
Merge tag 'cris-for-linus' of git://jni.nu/cris
Pull CRIS changes from Jesper Nilsson:
"No major changes here, but fixes some compile errors for CRIS, some
small style issues, some documentation and as a bonus nukes a couple
of obsolete rtc-files and related code."
* tag 'cris-for-linus' of git://jni.nu/cris:
cris: Remove old legacy "-traditional" flag from arch-v10/lib/Makefile
CRIS: Remove legacy RTC drivers
cris/mm/fault.c: Port OOM changes to do_page_fault
cris:fix the wrong function declear
CRIS: Add _sdata to vmlinux.lds.S
cris: posix_types.h, include asm-generic/posix_types.h
CRIS: Update documentation
cris/arch-v32: cryptocop: Use kzalloc
net:removed the unused variable
cris:removed the unused variable
CRISv32: Correct name of read_mostly section.
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/cris/README | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/Documentation/cris/README b/Documentation/cris/README index d9b086869a60..8dbdb1a44429 100644 --- a/Documentation/cris/README +++ b/Documentation/cris/README @@ -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 -below. +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: -http://developer.axis.com/doc/software/devboard_lx/install-howto.html - -<more specific information should come in this document later> +http://developer.axis.com/wiki/doku.php?id=axis:install-howto-2_20 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 -operating system. +called ETRAX. The ETRAX 100LX chip -------------------- -For reference, please see the press-release: +For reference, please see the following link: -http://www.axis.com/news/us/001101_etrax.htm +http://www.axis.com/products/dev_etrax_100lx/index.htm -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. Memory interfaces: @@ -51,20 +47,28 @@ I/O interfaces: * SCSI * 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 multiplexing) -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: + +http://www.axis.com/products/dev_etrax_fs/index.htm + +ETRAX FS and ARTPEC-3 are both CRISv32 architectures. Bootlog ------- @@ -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) - - |