* [patch][commit] Base address for hw-glue-probe-bus
@ 2006-08-29 17:55 Dave Brolley
2006-08-29 18:06 ` Frank Ch. Eigler
0 siblings, 1 reply; 3+ messages in thread
From: Dave Brolley @ 2006-08-29 17:55 UTC (permalink / raw)
To: sid
[-- Attachment #1: Type: text/plain, Size: 917 bytes --]
Hi,
The address which is driven on the "address" pin of hw-glue-probe-bus is
the one which comes in on the "upstream" bus. This is OK if the probe
bus is at the top of the memory heirarchy, but not so useful if it is,
for example, between a mapper and a memory component. In this case, the
address which is driven is the offset into the memory region.
In order to make this component more useful, I've committed the attached
patch which adds a "base-address" attribute to hw-glue-probe-bus. This
base is added to the address being probed and the result is driven on
the "address" pin. This allows the actual address being probed to be
driven in cases like the one above. The default value of "base-address"
is zero, so the behaviour of configurations which don't set it will not
change.
Tested on the internal port which exposed the requirement.
Let me know if you have any problems or concerns.
Dave
[-- Attachment #2: bus-probe.ChangeLog --]
[-- Type: text/plain, Size: 318 bytes --]
2006-08-29 Dave Brolley <brolley@redhat.com>
* glue.cxx (base_address): New member of bus_prober.
(bus_prober): Initialize base_address.
(writeAny): Add this->prober->base_address to the address driven.
(readAny): Likewise.
* hw-glue-probe-bus.xml: Document new base-address attribute.
* *.txt: Regenerated.
[-- Attachment #3: bus-probe.patch.txt --]
[-- Type: text/plain, Size: 4979 bytes --]
Index: sid/component/glue/glue.cxx
===================================================================
RCS file: /cvs/cvsfiles/devo/sid/component/glue/glue.cxx,v
retrieving revision 1.38
diff -c -p -r1.38 glue.cxx
*** sid/component/glue/glue.cxx 11 Nov 2002 22:28:28 -0000 1.38
--- sid/component/glue/glue.cxx 28 Aug 2006 18:58:34 -0000
***************
*** 1,6 ****
// glue.cxx - miscellaneous glue components. -*- C++ -*-
! // Copyright (C) 1999-2001 Red Hat.
// This file is part of SID and is licensed under the GPL.
// See the file COPYING.SID for conditions for redistribution.
--- 1,6 ----
// glue.cxx - miscellaneous glue components. -*- C++ -*-
! // Copyright (C) 1999-2001, 2006 Red Hat.
// This file is part of SID and is licensed under the GPL.
// See the file COPYING.SID for conditions for redistribution.
*************** class bus_prober: public virtual compone
*** 376,381 ****
--- 376,382 ----
probing_bus upstream;
bus* downstream;
+ host_int_4 base_address;
output_pin address_pin;
output_pin data_high_pin;
output_pin data_low_pin;
*************** public:
*** 390,396 ****
bus_prober::bus_prober ():
upstream (this),
! downstream (0)
{
sample_interval = 1;
--- 391,398 ----
bus_prober::bus_prober ():
upstream (this),
! downstream (0),
! base_address (0)
{
sample_interval = 1;
*************** public:
*** 408,413 ****
--- 410,416 ----
add_pin ("type", & this->accesstype_pin);
add_attribute ("type", & this->accesstype_pin, "pin");
+ add_attribute ("base-address", & this->base_address, "setting");
add_attribute ("sample-interval", & this->sample_interval, "setting");
add_attribute ("trace?", & this->upstream.verbose_p, "setting");
add_attribute ("label", & this->label, "setting");
*************** probing_bus::writeAny(host_int_4 addr, D
*** 470,476 ****
this->counter = 0;
// drive informational pins
! this->prober->address_pin.drive (addr);
typename DataType::host_int_type d_host = data; // natural endianness
host_int_8 d_wide(d_host); // widen
this->prober->data_high_pin.drive ((d_wide >> 32) & 0xFFFFFFFF);
--- 473,479 ----
this->counter = 0;
// drive informational pins
! this->prober->address_pin.drive (this->prober->base_address + addr);
typename DataType::host_int_type d_host = data; // natural endianness
host_int_8 d_wide(d_host); // widen
this->prober->data_high_pin.drive ((d_wide >> 32) & 0xFFFFFFFF);
*************** probing_bus::readAny(host_int_4 addr, Da
*** 506,512 ****
this->counter = 0;
// drive informational pins
! this->prober->address_pin.drive (addr);
typename DataType::host_int_type d_host = data; // natural endianness
host_int_8 d_wide(d_host); // widen
this->prober->data_high_pin.drive ((d_wide >> 32) & 0xFFFFFFFF);
--- 509,515 ----
this->counter = 0;
// drive informational pins
! this->prober->address_pin.drive (this->prober->base_address + addr);
typename DataType::host_int_type d_host = data; // natural endianness
host_int_8 d_wide(d_host); // widen
this->prober->data_high_pin.drive ((d_wide >> 32) & 0xFFFFFFFF);
Index: sid/component/glue/hw-glue-probe-bus.xml
===================================================================
RCS file: /cvs/cvsfiles/devo/sid/component/glue/hw-glue-probe-bus.xml,v
retrieving revision 1.4
diff -c -p -r1.4 hw-glue-probe-bus.xml
*** sid/component/glue/hw-glue-probe-bus.xml 27 May 2002 20:53:49 -0000 1.4
--- sid/component/glue/hw-glue-probe-bus.xml 28 Aug 2006 18:58:34 -0000
***************
*** 18,23 ****
--- 18,24 ----
<defpin name="type" direction="out" legalvalues="enum values" behaviors="bus traffic sampling" />
<!-- attributes -->
+ <defattribute name="base-address" category="setting" legalvalues="numeric" defaultvalue="0" behaviors="bus traffic tracing" />
<defattribute name="trace?" category="setting" legalvalues="boolean" defaultvalue="0" behaviors="bus traffic tracing" />
<defattribute name="sample-interval" category="setting" legalvalues="numeric" defaultvalue="1" behaviors="bus traffic sampling" />
<defattribute name="interval-counter" category="register" legalvalues="numeric" behaviors="bus traffic sampling" />
***************
*** 54,60 ****
pins. In sequence, the following output pins are driven:</p>
<ul>
<li>
! <name>address</name> - address parameter</li>
<li>
<name>data-high</name> - top 32 bits of bus data being read/written</li>
<li>
--- 55,61 ----
pins. In sequence, the following output pins are driven:</p>
<ul>
<li>
! <name>address</name> - address parameter added to the value of the <attribute>base-address</attribute> attribute</li>
<li>
<name>data-high</name> - top 32 bits of bus data being read/written</li>
<li>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [patch][commit] Base address for hw-glue-probe-bus
2006-08-29 17:55 [patch][commit] Base address for hw-glue-probe-bus Dave Brolley
@ 2006-08-29 18:06 ` Frank Ch. Eigler
[not found] ` <44F48761.9050007@redhat.com>
0 siblings, 1 reply; 3+ messages in thread
From: Frank Ch. Eigler @ 2006-08-29 18:06 UTC (permalink / raw)
To: Dave Brolley; +Cc: sid
Hi -
> The address which is driven on the "address" pin of hw-glue-probe-bus is
> the one which comes in on the "upstream" bus. This is OK if the probe
> bus is at the top of the memory heirarchy, but not so useful if it is,
> for example, between a mapper and a memory component. [...]
This sacrifices reusability of such a probe component in a
multiply-connected bus topology (having multiple incoming mappings on
the same upstream bus). To do this without would require more
"wiring", like putting the bus-probe between the transparent mapper
and a similarly configured normal one.
- FChE
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2006-08-29 20:37 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-08-29 17:55 [patch][commit] Base address for hw-glue-probe-bus Dave Brolley
2006-08-29 18:06 ` Frank Ch. Eigler
[not found] ` <44F48761.9050007@redhat.com>
[not found] ` <20060829183612.GF24243@redhat.com>
[not found] ` <44F48F16.1070702@redhat.com>
[not found] ` <20060829193935.GH24243@redhat.com>
2006-08-29 20:37 ` Dave Brolley
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).