© 2002-2005 Altium BV
1
LSL Sample Cases using
the Control P
rogram
LSL Sample Cases using the
Control Program
THE QUESTIONS…
1. How do I locate a function within a specific memory definition?
2. How do I locate a function at an absolute memory offset address?
3. How do I locate a function at an absolute address?
4. I have several functions that must be located within a specific memory definition. Their order
must be the order in which they were defined plus that they must be contiguous. Possible
alignment gaps between these sections may not be replaced with existing sections but
should simply remain gaps. How do I do this?
5. I have a function that I want to run from RAM memory. I would like the startup code to load
this function in RAM prior to entering the main program. How do I do this?
6. How do I locate a variable at a fixed address without using the __at() memory qualifier?
7. I have battery-backed data. I do not want the startup code to clear it because then it will also
be cleared in case of sudden reboots which I do not want. For this data I want the linker to
disable the clear at
tribute but how?
8. I know how I can address linker labels for the stack or heap. But how can I change their size
and/or start address?
9. We have a project that because of its size and complexity has been split into several logical
bloc
ks, each having their own group of engineers. All blocks are delivered to us as libraries
before finally locating the entire application. We want to avoid one group of engineers
accidentally using resources from other groups and therefore want a mechanism that restricts
memor
y use to w
ell defined memor
y blocks per group of engineers. No one may enter the
application block of someone else nor may a block itself exceed a certain size. Each
application block must be extended with a fill pattern to meet this size. Is there a way?
1
0. Within the memory map of our application we have specific memory parts that must be
reserved. No data may be located within this range other than data that is located by means
of an absolute address. Is there a way to do this in the Linker Script Language?
11. For a self-designed processor we need a way to define a Scratch-Pad RAM. Since it may only
be used for executing code we want to prevent the linker from using this RAM memory for
st
andard application dat
a. In a w
a
y it needs to be ‘disabled’ and only those groups that w
e
explicitly locate within it should be allowed. What internal memory definition should we use?
1
2.
W
e have two groups with sections requiring contiguous ordering. The groups themselves
must be contiguous but not necessarily ordered. What section layout definition do you
propose we use?
The aim of this document is to demonstrate the usage of the Linker Script Language while using the TriCore toolchain to locate
your application. It contains examples that deal with the most commonly used aspects of the language. It first lists all questions
a
nd continues with the proposed solutions. Studying this document will take 2 hours of your time. You may skip this document
if you intend to use EDE instead. In that case document “LSL Sample Cases using EDE” will suffice for most cases.
Each solution consists of a proposed section layout definition - which you must place in a user module layout.lsl - and an
invocation of the control program. The control program invocation will use tc1796.lsl for derivative definition and extmem.lsl for
external memory definition. You can find both in the product folder include.lsl.
You are encouraged to verify the results of the linker by checking the map file. You can also test most examples with CrossView
Pro’s simulator execution environment using the following command line invocation:
xfwtc example.elf -C tc1796 -tcfg tsim2.cfg
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