[maemo-developers] CPU Info

2006-09-11 Thread etienne

When executing: cat /proc/cpuinfo I see the following:
Processor   : ARM926EJ-Sid(wb) rev 3 (v5l)
BogoMIPS: 125.76
Features: swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant : 0x0
CPU part: 0x926
CPU revision: 3
Cache type  : write-back
Cache clean : cp15 c7 ops
Cache lockdown  : format C
Cache format: Harvard
I size  : 32768
I assoc : 4
I line length   : 32
I sets  : 256
D size  : 16384
D assoc : 4
D line length   : 32
D sets  : 128

Can anybody explain what the java feature in the Features mean?

Etienne


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Re: [maemo-developers] CPU Info

2006-09-11 Thread Olivier ROLAND

[EMAIL PROTECTED] a écrit :

When executing: cat /proc/cpuinfo I see the following:
Processor   : ARM926EJ-Sid(wb) rev 3 (v5l)
BogoMIPS: 125.76
Features: swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant : 0x0
CPU part: 0x926
CPU revision: 3
Cache type  : write-back
Cache clean : cp15 c7 ops
Cache lockdown  : format C
Cache format: Harvard
I size  : 32768
I assoc : 4
I line length   : 32
I sets  : 256
D size  : 16384
D assoc : 4
D line length   : 32
D sets  : 128

Can anybody explain what the java feature in the Features mean?

Etienne


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The 770 ARM core directly support Java bytecode execution
(Jazelle technology): http://www.arm.com/products/solutions/Jazelle.html
However as far as I know Linux currently doesn't support (yet) this 
capabilities

Proprietary software is needed to take advantage of Jazelle.

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Re: [maemo-developers] CPU Info

2006-09-11 Thread Andrew Barr
On Mon, 2006-09-11 at 16:51 -0400, [EMAIL PROTECTED] wrote:
 Can anybody explain what the java feature in the Features mean?

My uneducated guess is that it means Jazelle, which are Java extensions
for ARM. From what I've seen on various mailing lists, the exact details
of Jazelle are a seekrit (ooh!) for which you must sign an NDA with ARM
Ltd. Sadly that precludes most open source uses of it.

Andrew
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Re: [maemo-developers] CPU Info

2006-09-11 Thread Siarhei Siamashka
On Monday 11 September 2006 23:51, [EMAIL PROTECTED] wrote:

 When executing: cat /proc/cpuinfo I see the following:
 Processor   : ARM926EJ-Sid(wb) rev 3 (v5l)
 BogoMIPS: 125.76
 Features: swp half thumb fastmult edsp java
 CPU implementer : 0x41
 CPU architecture: 5TEJ
 CPU variant : 0x0
 CPU part: 0x926
 CPU revision: 3
 Cache type  : write-back
 Cache clean : cp15 c7 ops
 Cache lockdown  : format C
 Cache format: Harvard
 I size  : 32768
 I assoc : 4
 I line length   : 32
 I sets  : 256
 D size  : 16384
 D assoc : 4
 D line length   : 32
 D sets  : 128

 Can anybody explain what the java feature in the Features mean?

Probably the explanation is here (on the first page):
http://www.arm.com/pdfs/DVI0035B_926_PO.pdf

There are lots of other interesting docs at http://www.arm.com by the way.
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