Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Adding ZEROBASED allows the lm32 to enumerate fpga cores without
prviding a specific read() method.

Removing "verbose" as an argument to sdbfs_dev_create (and allowing
the user to set it in fs->flags) is a minor cleanup, though incompatible.
Userspace is fixed to deal with this incompatibility.

This is a slight incompatibility, but it's worh doing.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

s

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

ed

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This finally allows me to look at the content of an FPGA:

  wrs# sdb-read -l -e 0x70000 -m 0x100000@0x10000000 /dev/mem
  /tmp2/sdb-read: listing format is to be defined
  0000000000000651:e6a542c9 @ 00000000-0007ffff WB4-Crossbar-GSI
  0000000000000651:eef0b198 @ 00000000-0001ffff WB4-Bridge-GSI
  0000000000000651:e6a542c9 @ 00000000-0001ffff   WB4-Crossbar-GSI
  000000000000ce42:66cfeb52 @ 00000000-0000ffff   WB4-BlockRAM
  000000000000ce42:e2d13d04 @ 00010000-000100ff   WR-Periph-UART
  000000000000ce42:65158dc0 @ 00010100-000101ff   WR-Soft-PLL
  000000000000ce42:e503947e @ 00010200-0001021f   WB-SPI.Control
  000000000000ce42:441c5143 @ 00010300-000103ff   WB-GPIO-Port
  000000000000ce42:57494266 @ 00010400-000104ff   WB Simple Timer
  000000000000ce42:de0d8ced @ 00010500-000105ff   WR-PPS-Generator
  000000000000ce42:ba07b9d3 @ 00020000-0002ffff WRSW NIC
  0000000000000651:eef0b198 @ 00030000-00037fff WB4-Bridge-GSI
  0000000000000651:e6a542c9 @ 00030000-00037fff   WB4-Crossbar-GSI
  000000000000ce42:650c2d4f @ 00030000-000300ff   WR-Endpoint
  000000000000ce42:650c2d4f @ 00030400-000304ff   WR-Endpoint
  000000000000ce42:650c2d4f @ 00030800-000308ff   WR-Endpoint
  000000000000ce42:650c2d4f @ 00030c00-00030cff   WR-Endpoint
  [...]

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Conflicts:
	vme-wb/vme_wb.c

Added Cesar's driver for VME.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This merges subdirectory support for sdbfs. We are using it in FMC
mezzanine eeproms

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This is a trivial patch, swapping two blocks and adding a few
lines, so to allow "position=" and "maxsize=" to be used for
subdirectories.

This allows to reserve space for a new SDBFS image to be added
at a later time.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This commit doesn't change actual output for gensdbfs, but it prepares
for recursive scanning of directories. This is a separate commit to ease
my own debugging.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

External projects copying this directory will most likely have
their own "include" directory, but not always "include/linux".
This, use -I../include to they can place sdb.h in there without
modifying their copy of this Makefile.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

The interrupt discussion has been moved to the projects' wiki.
Besides that, some typos, external references and nothing else.
And today is not yesterday: new date is there.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Wesley W. Terpstra authored 12 years ago and Alessandro Rubini committed 11 years ago

This is mainly due to feedback by Matthieu Cattin and Wesley Terpstra

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This adds a section that explains why we don't describe interrupts.
Most of the section comes from a message by Wesley Terpstra,

  http://lists.ohwr.org/sympa/arc/fpga-config-space/2013-03/msg00000.html



(you may need to re-enter the same url in the browser after clicking on
the "I'm not a spammer" button).

I'm not personally able to make the discussion shorter, because I think
it's very informative.  The message has been slightly reworded to make
it less informal and more suitable to be an "official" rationale, and
I added some glue lines at the beginning and the end.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

With the new forced page breaks (previous commit) two pages had just a
single line in them. So this shrinks a little the text to fix the
problem.  I don't want to force page breaks only in some of the
subsections, for consistency.

Note: I tried the argument "3" to page breaks, to have them strongly
"suggeested" but not "mandated" (argument 4 or default if no argument),
but the result was like without page breaks (i.e., bad).

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

This is useful so the image and the table of fields are always on the
same page.  The default effect with float figures and table was
difficult to use as a reference while writing code.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>