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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2006-11-11 17:25:10 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2006-12-04 20:38:52 +1100 |
| commit | 4cb3cee03d558fd457cb58f56c80a2a09a66110c (patch) | |
| tree | fe903107d098871a7babc1e3432448758c542cde /arch/powerpc/Kconfig | |
| parent | d03f387eb321189bc2ba278b6ca82f1a45cf19d6 (diff) | |
| download | op-kernel-dev-4cb3cee03d558fd457cb58f56c80a2a09a66110c.zip op-kernel-dev-4cb3cee03d558fd457cb58f56c80a2a09a66110c.tar.gz | |
[POWERPC] Allow hooking of PCI MMIO & PIO accessors on 64 bits
This patch reworks the way iSeries hooks on PCI IO operations (both MMIO
and PIO) and provides a generic way for other platforms to do so (we
have need to do that for various other platforms).
While reworking the IO ops, I ended up doing some spring cleaning in
io.h and eeh.h which I might want to split into 2 or 3 patches (among
others, eeh.h had a lot of useless stuff in it).
A side effect is that EEH for PIO should work now (it used to pass IO
ports down to the eeh address check functions which is bogus).
Also, new are MMIO "repeat" ops, which other archs like ARM already had,
and that we have too now: readsb, readsw, readsl, writesb, writesw,
writesl.
In the long run, I might also make EEH use the hooks instead
of wrapping at the toplevel, which would make things even cleaner and
relegate EEH completely in platforms/iseries, but we have to measure the
performance impact there (though it's really only on MMIO reads)
Since I also need to hook on ioremap, I shuffled the functions a bit
there. I introduced ioremap_flags() to use by drivers who want to pass
explicit flags to ioremap (and it can be hooked). The old __ioremap() is
still there as a low level and cannot be hooked, thus drivers who use it
should migrate unless they know they want the low level version.
The patch "arch provides generic iomap missing accessors" (should be
number 4 in this series) is a pre-requisite to provide full iomap
API support with this patch.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
| -rw-r--r-- | arch/powerpc/Kconfig | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 3d26ba7..3e89d9d 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -394,6 +394,7 @@ config PPC_PSERIES config PPC_ISERIES bool "IBM Legacy iSeries" depends on PPC_MULTIPLATFORM && PPC64 + select PPC_INDIRECT_IO config PPC_CHRP bool "Common Hardware Reference Platform (CHRP) based machines" @@ -548,6 +549,15 @@ config PPC_970_NAP bool default n +config PPC_INDIRECT_IO + bool + select GENERIC_IOMAP + default n + +config GENERIC_IOMAP + bool + default n + source "drivers/cpufreq/Kconfig" config CPU_FREQ_PMAC |
