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| author | Greg Ungerer <gerg@uclinux.org> | 2011-10-14 14:43:30 +1000 |
|---|---|---|
| committer | Greg Ungerer <gerg@uclinux.org> | 2011-12-30 10:20:21 +1000 |
| commit | e08d703cc2ab6e47dbd10a74eb029f7dfa93d71d (patch) | |
| tree | f81a41ca2a92ed39a723b024b984d220373e6e01 /arch/m68k/Kconfig | |
| parent | 2c9b82adb5ea65745d5d73d97bb0e1cc16cba4a0 (diff) | |
| download | linux-e08d703cc2ab6e47dbd10a74eb029f7dfa93d71d.tar.bz2 | |
m68k: modify user space access functions to support ColdFire CPUs
Modify the user space access functions to support the ColdFire V4e cores
running with MMU enabled.
The ColdFire processors do not support the "moves" instruction used by
the traditional 680x0 processors for moving data into and out of another
address space. They only support the notion of a single address space,
and you use the usual "move" instruction to access that.
Create a new config symbol (CONFIG_CPU_HAS_ADDRESS_SPACES) to mark the
CPU types that support separate address spaces, and thus also support
the sfc/dfc registers and the "moves" instruction that go along with that.
The code is almost identical for user space access, so lets just use a
define to choose either the "move" or "moves" in the assembler code.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Matt Waddel <mwaddel@yahoo.com>
Acked-by: Kurt Mahan <kmahan@xmission.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/Kconfig')
| -rw-r--r-- | arch/m68k/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig index 32fd3642e71b..5f860cf67afc 100644 --- a/arch/m68k/Kconfig +++ b/arch/m68k/Kconfig @@ -66,6 +66,9 @@ config CPU_HAS_NO_BITFIELDS config CPU_HAS_NO_MULDIV64 bool +config CPU_HAS_ADDRESS_SPACES + bool + config HZ int default 1000 if CLEOPATRA |