diff options
| author | Greg Ungerer <gerg@uclinux.org> | 2011-05-17 16:45:00 +1000 |
|---|---|---|
| committer | Greg Ungerer <gerg@uclinux.org> | 2011-07-25 11:20:40 +1000 |
| commit | 171d809df1896c1022f9778cd2788be6c255a7dc (patch) | |
| tree | d944e5178d5a206c000019ccc96d4f45d2b1b668 /arch/m68k/Kconfig.nommu | |
| parent | f941f5caa0e947f4ed060a751ca4a3bf552af625 (diff) | |
| download | lwn-171d809df1896c1022f9778cd2788be6c255a7dc.tar.gz lwn-171d809df1896c1022f9778cd2788be6c255a7dc.zip | |
m68k: merge mmu and non-mmu bitops.h
The following patch merges the mmu and non-mmu versions of the m68k
bitops.h files. Now there is a good deal of difference between the two
files, but none of it is actually an mmu specific difference. It is
all about the specific m68k/coldfire varient we are targeting. So it
makes an awful lot of sense to merge these into a single bitops.h.
There is a number of ways I can see to factor this code. The approach
I have taken here is to keep the various versions of each macro/function
type together. This means that there is some ifdefery with each to handle
each CPU type.
I have added some comments in a couple of appropriate places to try
and make it clear what the differences we are dealing with are.
Specifically the instruction and addressing mode differences we have
to deal with.
The merged form keeps the same underlying optimizations for each CPU
type for all the general bit clear/set/change and find bit operations.
It does switch to using the generic le operations though, instead of
any local varients.
Build tested on ColdFire, 68328, 68360 (which is cpu32) and 68020+.
Run tested on ColdFire and ARAnyM.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/Kconfig.nommu')
| -rw-r--r-- | arch/m68k/Kconfig.nommu | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/m68k/Kconfig.nommu b/arch/m68k/Kconfig.nommu index b004dc1b1710..ff46383112a4 100644 --- a/arch/m68k/Kconfig.nommu +++ b/arch/m68k/Kconfig.nommu @@ -16,6 +16,7 @@ config GENERIC_CLOCKEVENTS config M68000 bool + select CPU_HAS_NO_BITFIELDS help The Freescale (was Motorola) 68000 CPU is the first generation of the well known M68K family of processors. The CPU core as well as @@ -25,6 +26,7 @@ config M68000 config MCPU32 bool + select CPU_HAS_NO_BITFIELDS help The Freescale (was then Motorola) CPU32 is a CPU core that is based on the 68020 processor. For the most part it is used in @@ -34,6 +36,7 @@ config COLDFIRE bool select GENERIC_GPIO select ARCH_REQUIRE_GPIOLIB + select CPU_HAS_NO_BITFIELDS help The Freescale ColdFire family of processors is a modern derivitive of the 68000 processor family. They are mainly targeted at embedded |