From d3f9546960f56c05624e2932a899db7f1d38a480 Mon Sep 17 00:00:00 2001 From: Khem Raj Date: Fri, 27 Jun 2008 04:01:29 +0000 Subject: Sync build machinery stuff from trunk. Some more fixed for mips nptl port --- libc/sysdeps/linux/mips/sys/asm.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'libc/sysdeps/linux/mips/sys/asm.h') diff --git a/libc/sysdeps/linux/mips/sys/asm.h b/libc/sysdeps/linux/mips/sys/asm.h index 76f6af3e1..4c8bd9cb2 100644 --- a/libc/sysdeps/linux/mips/sys/asm.h +++ b/libc/sysdeps/linux/mips/sys/asm.h @@ -469,5 +469,20 @@ symbol = value # define MFC0 dmfc0 # define MTC0 dmtc0 #endif +/* The MIPS archtectures do not have a uniform memory model. Particular + platforms may provide additional guarantees - for instance, the R4000 + LL and SC instructions implicitly perform a SYNC, and the 4K promises + strong ordering. + + However, in the absence of those guarantees, we must assume weak ordering + and SYNC explicitly where necessary. + + Some obsolete MIPS processors may not support the SYNC instruction. This + applies to "true" MIPS I processors; most of the processors which compile + using MIPS I implement parts of MIPS II. */ + +#ifndef MIPS_SYNC +# define MIPS_SYNC sync +#endif #endif /* sys/asm.h */ -- cgit v1.2.3