Re: [RFC][PATCH] bcmai: introduce AI driver

From: George Kashperko
Date: Sat Apr 09 2011 - 03:13:32 EST

> On Fri, 08 Apr 2011 18:56:13 +0200, RafaÅ MiÅecki <zajec5@xxxxxxxxx> wrote:
> > 2011/4/6 Arend van Spriel <arend@xxxxxxxxxxxx>:
> >> 3. Device identification
> >>
> >> The cores are identified by manufacturer, core id and revision in your
> >> patch. I would not use the revision because 4 out of 5 times a revision
> >> change does indicate a hardware change but no change in programming
> >> interface. The enumeration data does contain a more selective field
> >> indicating the core class (4 bits following the core identifier). I
> >> suggest
> >> to replace the revision field by this class field.
> >
> > Could you say something more about *class*, please? For my BCM43224 it
> > seems to be 0x0. WIll check BCM4313 in a moment.
> >
> In principal the manufacturer id is unique (defined/assigned by JEDEC
> and the chip id and chip class are defined by the
> manufacturer. So I can only indicate what classes Broadcom uses in
> combination with the manufacturer id BRCM, ARM and MIPS.
> /* Component Classes */
> #define CC_SIM 0
> #define CC_EROM 1
> #define CC_CORESIGHT 9
> #define CC_VERIF 0xb
> #define CC_OPTIMO 0xd
> #define CC_GEN 0xe
> #define CC_PRIMECELL 0xf
> Looking at this it seems strange that you see a class value of 0x0. It may
> be rarely used or for non-production chips only (for simulation, chip
> bringup) which may require additional (debug) functions. So question is
> whether you will need it, but it is specified by ARM and it is up to
> manufacturers to use it. So I it is better to be safe than sorry and have
> this in the device id.
> Gr. AvS
When parsing bcm4716 EROM I have
cia & CIA_CCL_MASK equal to 0 for all 9 cores

You mentioned ARM DMP (Device Management Plugin) several times in
earlier messages some time ago but I can't find anything relevant about
that at ARM infocenter. Any chance you can point more precise location
for any DMP reference?

Have nice day,

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