diff options
author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-18 13:42:23 +0400 |
---|---|---|
committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 21:46:02 +0400 |
commit | 41195d236e84458bebd4fdc218610a92231ac791 (patch) | |
tree | c0049630c1a21a071c9c942086041029ebdf2866 /arch/arc/Makefile | |
parent | 0ef88a54aa341f754707414500158addbf35c780 (diff) | |
download | linux-41195d236e84458bebd4fdc218610a92231ac791.tar.xz |
ARC: SMP support
ARC common code to enable a SMP system + ISS provided SMP extensions.
ARC700 natively lacks SMP support, hence some of the core features are
are only enabled if SoCs have the necessary h/w pixie-dust. This
includes:
-Inter Processor Interrupts (IPI)
-Cache coherency
-load-locked/store-conditional
...
The low level exception handling would be completely broken in SMP
because we don't have hardware assisted stack switching. Thus a fair bit
of this code is repurposing the MMU_SCRATCH reg for event handler
prologues to keep them re-entrant.
Many thanks to Rajeshwar Ranga for his initial "major" contributions to
SMP Port (back in 2008), and to Noam Camus and Gilad Ben-Yossef for help
with resurrecting that in 3.2 kernel (2012).
Note that this platform code is again singleton design pattern - so
multiple SMP platforms won't build at the moment - this deficiency is
addressed in subsequent patches within this series.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rajeshwar Ranga <rajeshwar.ranga@gmail.com>
Cc: Noam Camus <noamc@ezchip.com>
Cc: Gilad Ben-Yossef <gilad@benyossef.com>
Diffstat (limited to 'arch/arc/Makefile')
-rw-r--r-- | arch/arc/Makefile | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 642c0406d600..fae66bfc2bdb 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -133,3 +133,6 @@ archclean: # Thus forcing all exten calls in this file to be long calls export CFLAGS_decompress_inflate.o = -mmedium-calls export CFLAGS_initramfs.o = -mmedium-calls +ifdef CONFIG_SMP +export CFLAGS_core.o = -mmedium-calls +endif |