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From: cvs at opencores.org<cvs@o...>
Date: Wed Jan 30 14:09:31 CET 2008
Subject: [cvs-checkins] MODIFIED: jop ...
Date: 00/08/01 30:14:09

Modified: jop/doc/book comments.tex
Log:
added Lutz comments on Native


Revision Changes Path
1.2 jop/doc/book/comments.tex

http://www.opencores.org/cvsweb.shtml/jop/doc/book/comments.tex.diff?r1=1.1&r2=1.2

(In the diff below, changes in quantity of whitespace are not shown.)

Index: comments.tex
===================================================================
RCS file: /cvsroot/martin/jop/doc/book/comments.tex,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -b -r1.1 -r1.2
--- comments.tex 30 Jan 2008 10:03:34 -0000 1.1
+++ comments.tex 30 Jan 2008 13:09:31 -0000 1.2
@@ -1,4 +1,4 @@
-\documentclass[a4paper,12pt,twocolumn]{scrartcl}
+\documentclass[a4paper,12pt]{scrartcl}
\usepackage{pslatex} % -- times instead of computer modern

\usepackage[colorlinks=true,linkcolor=black,citecolor=black]{hyperref}
@@ -8,10 +8,12 @@

\begin{document}

-\title{Comments on the handbook}
+\title{Comments on the Handbook}
\maketitle \thispagestyle{empty}

-\subsection*{Paulo 20.12.2007}
+\section{User Suggestions}
+
+\subsection{Paulo 20.12.2007}



@@ -39,5 +41,98 @@
Of course it can be depicted in a bit more detail, for some of the
structures above. How about that?

+\subsection{Lutz 15.1.2008}
+
+\begin{verbatim}
+
+Hi Martin,
+for me as JAVA beginner:
+Do you have a more detailed overview or link about the function of
+com.jopdesign.sys.native (see below)?
+What are the differences between the multiple rd and wr accesses (e.g.
+rd,rdMem,rdIntMem)?
+Where can i find JopInstr.java?
+
+Lutz
+
+package com.jopdesign.sys;
+
+/**
+* native functions in JOP JVM.
+* Mapping is defined in JopInstr.java
+*/
+
+public class Native {
+
+public static native int rd(int adr);
+public static native void wr(int val, int adr);
+public static native int rdMem(int adr);
+public static native void wrMem(int val, int adr);
+public static native int rdIntMem(int adr);
+public static native void wrIntMem(int val, int adr);
+public static native int getSP();
+public static native void setSP(int val);
+public static native int getVP();
+public static native void setVP(int val);
+public static native void int2extMem(int intAdr, int[] extAdr, int cnt);
+public static native void ext2intMem(int[] extAdr, int intAdr, int cnt);
+public static native long makeLong(int hWord, int lWord);
+public static native void invoke(int arg, int ptr);
+public static native void invoke(int ptr);
+public static native int toInt(Object o);
+public static native Object toObject(int i);
+public static native int[] toIntArray(int i);
+public static native int toInt(float f);
+public static native float toFloat(int i);
+public static native long toLong(double d);
+public static native double toDouble(long l);
+// public static native int condMove(int a, int b, boolean cond);
+/**
+*
+* @param src memory source address
+* @param dest memory destination address
+* @param cnt number of words (cnt must be >0!)
+*/
+public static native void memCopy(int src, int dest, int cnt);
+
+}
+ + +Hi Lutz, + +> for me as JAVA beginner: +> Do you have a more detailed overview or link about the function of +> com.jopdesign.sys.native (see below)? + +It's not about Java beginner, it's missing info from my side ;-) +Actual those are very low-level functions and should only be +used when accessing IO devices. A better solution (HW-Objects) +is on the way. + +> What are the differences between the multiple rd and wr accesses (e.g. +> rd,rdMem,rdIntMem)? + +rd and rdMem, as wr and wrMem are actually the same. rd()/wr() +should be removed - it's a history thing where I had different +memory areas for main memory and IO device. + +The functions access directly the main memory or IO devices. +IO device addresses are defined in Const.java + +rdIntMem() and wrIntMem() provides access to the on-chip +stack and is only used for a thread switch and stack trace +on an Exception. Absolute no use in an application code. + + +> Where can i find JopInstr.java? + +in java/tools/src/com/jopdesign/tools + +Cheers, +Martin + +PS: I'll take a note that I should comment Native.java + +\end{verbatim} \end{document}