Commit Graph

23 Commits

Author SHA1 Message Date
Ian Lepore
a66dc0c52b Include machine/acle-compat.h in cdefs.h on arm if the compiler doesn't
have ACLE support built in.  The ACLE (ARM C Language Extensions) defines
a set of standardized symbols which indicate the architecture version and
features available.  ACLE support is built in to modern compilers (both
clang and gcc), but absent from gcc prior to 4.4.

ARM (the company) provides the acle-compat.h header file to define the
right symbols for older versions of gcc.  Basically, acle-compat.h does
for arm about the same thing cdefs.h does for freebsd: defines
standardized macros that work no matter which compiler you use.  If ARM
hadn't provided this file we would have ended up with a big #ifdef __arm__
section in cdefs.h with our own compatibility shims.

Remove #include <machine/acle-compat.h> from the zillion other places (an
ever-growing list) that it appears.  Since style(9) requires sys/types.h
or sys/param.h early in the include list, and both of those lead to
including cdefs.h, only a couple special cases still need to include
acle-compat.h directly.

Loves it:     imp
2016-05-25 19:44:26 +00:00
Andrew Turner
19bec15c6f Limit arm_base_bs_tag to ARMv4 and ARMv5, we only used it in one place in
armv6 and that can use fdtbus_bs_tag.
2015-11-21 13:02:34 +00:00
Michal Meloun
4dbc00835d ARM: Remove trailing whitespace from sys/arm/include
No functional changes.

Approved by:    kib (mentor)
2015-11-10 12:02:41 +00:00
Ian Lepore
ede35faed2 Micro-optimize the new arm inline bus_space implementation by grouping all
the data the inline functions access together at the start of the bus_space
struct.  The start-of part isn't so important, it's the grouping-together
that's the point: now all the most-accessed data should be in one cache line.

Suggested by:	  cognet
2015-01-21 20:12:35 +00:00
Ian Lepore
afe43c7b5f The versatile platform had two copies of a bus_space that are essentially
duplicates of the standard arm base bus_space, so just use it.
2015-01-21 04:06:36 +00:00
Ian Lepore
2737497b83 Move bs_unimplemented() to bus_space_generic.c so it can be shared. 2015-01-21 03:24:18 +00:00
Ian Lepore
4098ccafa4 Revise the arm bus_space implementation to avoid dereferencing the tag on
every operation to retrieve the bs_cookie value almost nothing actually uses.

The bus_space struct contains a private data pointer (poorly named bs_cookie,
now renamed to bs_privdata) which is used only by a few old armv4 xscale
implementations.  The bus_space functions were all defined to take this
value as the first parameter instead of the bus_space_tag_t, requiring all
the inline macro and function expansions to dereference the tag to pass it
to another function, which never uses it.  Now all the functions take the tag
as the first parameter and retrieve the privdata if they need it.

Also fix a couple bus_space_unmap() implementations that were calling
kva_free() instead of pmap_unmapdev().

Discussed with:	   cognet
2015-01-21 01:06:08 +00:00
Ian Lepore
16e2dc663f Add inline implementations of arm bus_space_read/write_N().
Reviewed by:	cognet
2015-01-20 22:56:59 +00:00
Aleksandr Rybalko
4117c1db9e o Switch to use physical addresses in rman for FDT.
o Remove vtophys used to translate virtual address to physical in case rman carry virtual.

Sponsored by:	The FreeBSD Foundation
2013-03-18 15:18:55 +00:00
Ian Lepore
33ff10ea55 Add a macro that gets the physical address of a memory mapped device
register from a bus space resource.

Note that this macro is just for ARM, and is intended to have a short
lifespan.  The DMA engines in some SoCs need the physical address of a
memory-mapped device register as one of the arguments for the transfer.
Several scattered ad-hoc solutions have been converted to use this macro,
which now also serves to mark the places where a more complete fix needs
to be applied (after that fix has been designed).
2013-03-17 03:04:43 +00:00
Rebecca Cran
c90f7d9b44 Revert r216134. This checkin broke platforms where bus_space are macros:
they need to be a single statement, and do { } while (0) doesn't work in this
situation so revert until a solution can be devised.
2010-12-03 07:09:23 +00:00
Rebecca Cran
15b4888a24 Disallow passing in a count of zero bytes to the bus_space(9) functions.
Passing a count of zero on i386 and amd64 for [I386|AMD64]_BUS_SPACE_MEM
causes a crash/hang since the 'loop' instruction decrements the counter
before checking if it's zero.

PR:	kern/80980
Discussed with:	jhb
2010-12-02 22:19:30 +00:00
Warner Losh
b938b7a366 Add BUS_SPACE_UNRESTRICTED and define it to be ~0, just like all the
other platforms.
2010-04-08 19:34:55 +00:00
Warner Losh
d01c5f360e The NetBSD Foundation has granted permission to remove clauses 3 and 4.
Obtained from:	NetBSD
2010-02-16 21:59:17 +00:00
Sam Leffler
588a2322a9 correct bus space unmap prototype
Reviewed by:	cognet, imp
MFC after:	1 month
2006-11-19 23:46:50 +00:00
Warner Losh
06db52b609 Break out the definition of bus_space_{tag,handle}_t and a few other types
into _bus.h to help with name space polution from including all of bus.h.
In a few days, I'll commit changes to the MI code to take advantage of thse
sepration (after I've made sure that these changes don't break anything in
the main tree, I've tested in my trees, but you never know...).

Suggested by: bde (in 2002 or 2003 I think)
Reviewed in principle by: jhb
2005-04-18 21:45:34 +00:00
Scott Long
5974e5c71c Refactor the bus_dma header files so that the interface is described in
sys/bus_dma.h instead of being copied in every single arch.  This slightly
reorders a flag that was specific to AXP and thus changes the ABI there.
The interface still relies on bus_space definitions found in <machine/bus.h>
so it cannot be included on its own yet, but that will be fixed at a later
date.  Add an MD <machine/bus_dma.h> for ever arch for consistency and to
allow for future MD augmentation of the API.  sparc64 makes heavy use of
this right now due to its different bus_dma implemenation.
2005-03-14 16:46:28 +00:00
Olivier Houchard
34c8913825 Add the prototype for bus_dmamap_load_mbuf_sg().
Spotted out by:	scottl
2005-01-15 19:31:08 +00:00
Warner Losh
d8315c79d9 Start all license statements with /*- 2005-01-05 21:58:49 +00:00
Olivier Houchard
a5bb1c8501 Remove bus_space_vaddr(), it does not exists in FreeBSD. 2004-09-23 21:59:14 +00:00
Olivier Houchard
62f1185016 Nuke bus_space_mmap(), as it does not exist in FreeBSD. 2004-06-17 17:51:48 +00:00
Poul-Henning Kamp
89c9c53da0 Do the dreaded s/dev_t/struct cdev */
Bump __FreeBSD_version accordingly.
2004-06-16 09:47:26 +00:00
Olivier Houchard
6fc729af63 Import FreeBSD/arm kernel bits.
It only supports sa1110 (on simics) right now, but xscale support should come
soon.
Some of the initial work has been provided by :
Stephane Potvin <sepotvin at videotron.ca>
Most of this comes from NetBSD.
2004-05-14 11:46:45 +00:00