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linux-next/arch
Benjamin Herrenschmidt 859deea949 [POWERPC] Cell timebase bug workaround
The Cell CPU timebase has an erratum. When reading the entire 64 bits
of the timebase with one mftb instruction, there is a handful of cycles
window during which one might read a value with the low order 32 bits
already reset to 0x00000000 but the high order bits not yet incremeted
by one. This fixes it by reading the timebase again until the low order
32 bits is no longer 0. That might introduce occasional latencies if
hitting mftb just at the wrong time, but no more than 70ns on a cell
blade, and that was considered acceptable.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-25 11:54:18 +10:00
..
alpha [PATCH] fixing includes in alpha_ksyms.c 2006-10-12 12:25:27 -07:00
arm [PATCH] one more ARM IRQ fix 2006-10-20 10:26:44 -07:00
arm26 [PATCH] remove bogus arch-specific syscall exports 2006-10-11 11:17:07 -07:00
avr32 [PATCH] IRQ: Fix AVR32 breakage 2006-10-11 11:14:14 -07:00
cris more misc typo fixes 2006-10-03 22:34:14 +02:00
frv IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 2006-10-05 15:10:12 +01:00
h8300 Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
i386 [PATCH] x86: Revert new unwind kernel stack termination 2006-10-21 18:37:02 +02:00
ia64 [IA64] Count resched interrupts 2006-10-17 15:03:08 -07:00
m32r [PATCH] m32r: more __user annotations 2006-10-11 11:17:06 -07:00
m68k [PATCH] clean m68k ksyms 2006-10-11 11:17:06 -07:00
m68knommu [PATCH] m68knommu: sync syscalls with m68k 2006-10-13 08:35:39 -07:00
mips [MIPS] Fix aliasing bug in copy_to_user_page / copy_from_user_page 2006-10-21 23:17:35 +01:00
parisc [PATCH] remove bogus arch-specific syscall exports 2006-10-11 11:17:07 -07:00
powerpc [POWERPC] Cell timebase bug workaround 2006-10-25 11:54:18 +10:00
ppc [POWERPC] Support feature fixups in vdso's 2006-10-25 11:54:07 +10:00
s390 [S390] update default configuration 2006-10-18 18:30:59 +02:00
sh sh: SH-4A UBC support 2006-10-12 12:16:13 +09:00
sh64 fix file specification in comments 2006-10-03 23:01:26 +02:00
sparc [SPARC]: Sparc compilation fix with floppy enabled 2006-10-17 19:28:54 -07:00
sparc64 [SPARC64]: Fix of_ioremap(). 2006-10-19 17:20:31 -07:00
um [PATCH] uml: mmapper - remove just added but wrong "const" attribute 2006-10-20 10:26:36 -07:00
v850 Remove all inclusions of <linux/config.h> 2006-10-04 03:38:54 -04:00
x86_64 [PATCH] x86-64: increase PHB1 split transaction timeout 2006-10-22 00:41:15 +02:00
xtensa fix file specification in comments 2006-10-03 23:01:26 +02:00