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Paul Mackerras f007cacffc [POWERPC] Fix MMIO ops to provide expected barrier behaviour 
This changes the writeX family of functions to have a sync instruction
before the MMIO store rather than after, because the generally expected
behaviour is that the device receiving the MMIO store can be guaranteed
to see the effects of any preceding writes to normal memory.

To preserve ordering between writeX and readX, and to preserve ordering
between preceding stores and the readX, the readX family of functions
have had an sync added before the load.

Although writeX followed by spin_unlock is not officially guaranteed
to keep the writeX inside the spin-locked region unless an mmiowb()
is used, there are currently drivers that depend on the previous
behaviour on powerpc, which was that the mmiowb wasn't actually required.
Therefore we have a per-cpu flag that is set by writeX, cleared by
__raw_spin_lock and mmiowb, and tested by __raw_spin_unlock.  If it is
set, __raw_spin_unlock does a sync and clears it.

This changes both 32-bit and 64-bit readX/writeX.  32-bit already has a
sync in __raw_spin_unlock (since lwsync doesn't exist on 32-bit), and thus
doesn't need the per-cpu flag.

Tested on G5 (PPC970) and POWER5.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-09-13 22:08:26 +10:00
..
iseries [POWERPC] Clean up it_lp_queue.h 2006-06-28 15:18:55 +10:00
8253pit.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
a.out.h [PATCH] powerpc: Merge include/asm-ppc*/a.out.h into include/asm-powerpc 2005-09-21 19:21:08 +10:00
abs_addr.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
agp.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
asm-compat.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
atomic.h power: improve inline asm memory constraints 2006-07-08 15:00:28 -07:00
auxvec.h [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernel 2005-11-11 22:25:39 +11:00
backlight.h [PATCH] powermac: More powermac backlight fixes 2006-07-31 13:28:45 -07:00
bitops.h power: improve inline asm memory constraints 2006-07-08 15:00:28 -07:00
bootx.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
btext.h [PATCH] powerpc: Unify udbg (#2) 2006-01-09 14:49:54 +11:00
bug.h [PATCH] git-powerpc: WARN was a dumb idea 2006-03-28 20:48:54 +11:00
bugs.h [PATCH] powerpc: Make check_bugs() static inline 2005-09-09 22:11:35 +10:00
byteorder.h [PATCH] powerpc: merge byteorder.h 2005-09-28 15:42:53 +10:00
cache.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
cacheflush.h [PATCH] powerpc: Merge cacheflush.h and cache.h 2005-11-10 13:09:22 +11:00
checksum.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
compat.h [PATCH] powerpc signal __user annotations 2006-02-08 01:03:46 -05:00
cputable.h [POWERPC] Simplify the code defining the 64-bit CPU features 2006-06-28 15:19:03 +10:00
cputime.h [PATCH] powerpc: implement missing jiffies64_to_cputime64() 2006-07-05 09:39:54 -07:00
current.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
dbdma.h powerpc: Merge various powermac-related header files. 2005-10-20 20:53:39 +10:00
delay.h [POWERPC] Fix mdelay badness on shared processor partitions 2006-06-21 15:01:33 +10:00
div64.h [PATCH] Move the identical files from include/asm-ppc{,64} 2005-08-30 13:32:05 +10:00
dma-mapping.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
eeh.h [POWERPC] Fix MMIO ops to provide expected barrier behaviour 2006-09-13 22:08:26 +10:00
eeh_event.h [PATCH] powerpc/pseries: clear PCI failure counter if no new failures 2006-04-22 18:46:13 +10:00
elf.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
emergency-restart.h [PATCH] Move the identical files from include/asm-ppc{,64} 2005-08-30 13:32:05 +10:00
errno.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
fcntl.h [PATCH] Consolidate the asm-ppc*/fcntl.h files into asm-powerpc 2005-09-07 16:57:39 -07:00
firmware.h [PATCH] powerpc: Rename and export ppc64_firmware_features 2006-03-28 16:45:20 +11:00
floppy.h [PATCH] irq-flags: POWERPC: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
futex.h [POWERPC] Implement PowerPC futex_atomic_cmpxchg_inatomic(). 2006-09-13 18:28:41 +10:00
grackle.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hardirq.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
heathrow.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
hvcall.h [POWERPC] check firmware state before suspending 2006-06-15 19:31:27 +10:00
hvconsole.h [PATCH] powerpc: hvc_console updates 2006-03-28 16:45:26 +11:00
hvcserver.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
hw_irq.h [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() 2006-06-29 10:26:23 -07:00
i8259.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
ibmebus.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ide.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
immap_86xx.h [POWERPC] Add 8641 Register space and IRQ definitions. 2006-06-21 15:01:28 +10:00
io.h [POWERPC] Fix MMIO ops to provide expected barrier behaviour 2006-09-13 22:08:26 +10:00
ioctl.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
ioctls.h powerpc: remove duplicate ioctl definitions 2005-11-01 14:36:30 +11:00
iommu.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
ipc.h [PATCH] Move the identical files from include/asm-ppc{,64} 2005-08-30 13:32:05 +10:00
ipcbuf.h [PATCH] powerpc: Keep fixing merged ipcbuf.h 2005-11-03 16:58:17 +11:00
ipic.h [POWERPC] back up old school ipic.[hc] to arch/ppc 2006-08-30 10:34:33 +10:00
irq.h [PATCH] powerpc: fix trigger handling in the new irq code 2006-07-10 13:24:20 -07:00
irqflags.h [PATCH] lockdep: irqtrace subsystem, core 2006-07-03 15:27:03 -07:00
Kbuild Add Kbuild file for PowerPC 'make headers_install' 2006-06-18 12:17:47 +01:00
kdebug.h [PATCH] Notify page fault call chain for powerpc 2006-06-26 09:58:22 -07:00
kdump.h [POWERPC] kdump: Support kernels having 64k page size. 2006-09-13 18:30:04 +10:00
kexec.h [POWERPC] Make crash.c work on 32-bit and 64-bit 2006-08-17 16:41:10 +10:00
keylargo.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
kmap_types.h [PATCH] powerpc: Merge kmap_types.h 2005-09-19 09:38:49 +10:00
kprobes.h [PATCH] IA64: kprobe invalidate icache of jump buffer 2006-07-31 13:28:38 -07:00
linkage.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
lmb.h [PATCH] powerpc: Remove calculation of io hole 2006-03-22 15:04:30 +11:00
local.h [PATCH] Move all the very similar files to asm-powerpc 2005-08-30 13:32:06 +10:00
lppaca.h [PATCH] Fix sparse parse error in lppaca.h 2006-01-17 17:18:25 -08:00
machdep.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
macio.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mc146818rtc.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
mediabay.h powerpc: Merge various powermac-related header files. 2005-10-20 20:53:39 +10:00
mman.h [PATCH] add asm-generic/mman.h 2006-02-15 15:32:22 -08:00
mmu.h [POWERPC] powerpc: Initialise ppc_md htab pointers earlier 2006-06-28 11:59:47 +10:00
mmu_context.h [POWERPC] Correct the MAX_CONTEXT definition 2006-06-29 16:16:15 +10:00
mmzone.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
module.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
mpc86xx.h [POWERPC] Use mpc8641hpcn PIC base address from dev tree. 2006-08-25 14:32:13 +10:00
mpic.h [POWERPC] Support for "weird" MPICs and fixup mpc7448_hpc2 2006-08-30 14:29:42 +10:00
msgbuf.h [PATCH] powerpc: Merge a few more include files 2005-09-09 22:11:35 +10:00
mutex.h [PATCH] mutex subsystem, add default include/asm-*/mutex.h files 2006-01-09 15:59:19 -08:00
namei.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
nvram.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
of_device.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
ohare.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
oprofile_impl.h [PATCH] powerpc: Remove oprofile spinlock backtrace code 2006-03-29 13:44:16 +11:00
paca.h [POWERPC] Fix MMIO ops to provide expected barrier behaviour 2006-09-13 22:08:26 +10:00
page.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
page_32.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
page_64.h [PATCH] powerpc: Fix pagetable bloat for hugepages 2006-04-28 15:02:51 +10:00
param.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
parport.h [PATCH] powerpc: parallel port init fix 2006-01-11 14:49:24 +11:00
pci-bridge.h [POWERPC] pcibus_to_node fixes 2006-06-15 19:31:26 +10:00
pci.h [PATCH] 64bit resource: change pci core and arch code to use resource_size_t 2006-06-27 09:24:00 -07:00
percpu.h [PATCH] lockdep: add per_cpu_offset() 2006-07-03 15:27:00 -07:00
pgalloc.h [POWERPC] hugepage BUG fix 2006-08-24 10:07:23 +10:00
pgtable-4k.h powerpc: Use 64k pages without needing cache-inhibited large pages 2006-06-15 10:45:18 +10:00
pgtable-64k.h powerpc: Use 64k pages without needing cache-inhibited large pages 2006-06-15 10:45:18 +10:00
pgtable.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
pmac_feature.h [PATCH] powerpc: Kill _machine and hard-coded platform numbers 2006-03-28 23:15:54 +11:00
pmac_low_i2c.h [PATCH] 3/5 powerpc: Add platform functions interpreter 2006-01-09 15:47:18 +11:00
pmac_pfunc.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
pmc.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
poll.h [PATCH] POLLRDHUP/EPOLLRDHUP handling for half-closed devices notifications 2006-03-25 08:22:56 -08:00
posix_types.h [PATCH] powerpc: Merge asm-ppc*/posix_types.h 2005-09-21 19:21:07 +10:00
ppc-pci.h [PATCH] powerpc: properly configure DDR/P5IOC children devs 2006-03-16 16:55:07 +11:00
ppc_asm.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
processor.h [POWERPC] disable floating point exceptions for init 2006-06-21 15:01:33 +10:00
prom.h [POWERPC] Make OF irq map code detect more error cases 2006-08-30 14:31:03 +10:00
pSeries_reconfig.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
ptrace.h [PATCH] powerpc: enable PPC_PTRACE_[GS]ETREGS on ppc32 2006-06-09 21:20:51 +10:00
reg.h [POWERPC] cell: add RAS support 2006-06-21 15:01:29 +10:00
reg_8xx.h [PATCH] powerpc: Merge cacheflush.h and cache.h 2005-11-10 13:09:22 +11:00
resource.h [PATCH] Move all the very similar files to asm-powerpc 2005-08-30 13:32:06 +10:00
rtas.h [POWERPC] Fix might-sleep warning on removing cpus 2006-08-08 16:00:11 +10:00
rtc.h powerpc: Make set_rtc_time() return error code from lower-level function 2005-10-22 15:57:55 +10:00
rwsem.h [PATCH] lockdep: remove RWSEM_DEBUG remnants 2006-07-03 15:27:01 -07:00
scatterlist.h [PATCH] powerpc: merge scatterlist.h 2005-10-27 16:45:52 +10:00
seccomp.h powerpc: Fix some #ifndef __KERNEL__ that should be #ifdef 2006-01-09 15:14:05 +11:00
sections.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
semaphore.h Merge ../linux-2.6 by hand 2005-10-31 13:37:12 +11:00
sembuf.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
serial.h powerpc: Introduce a new config symbol to control 16550 early debug code 2006-01-10 16:19:05 +11:00
setup.h [PATCH] powerpc: Merge a few more include files 2005-09-09 22:11:35 +10:00
shmbuf.h [PATCH] powerpc: Fix __power64__ typos that should be __powerpc64__ 2005-09-09 22:11:35 +10:00
shmparam.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
sigcontext.h powerpc: merge sigcontext.h 2005-11-03 16:24:25 +11:00
siginfo.h [PATCH] ppc64: Add definitions for new PTRACE calls 2005-09-12 17:19:12 +10:00
signal.h [PATCH] irq-flags: POWERPC: Use the new IRQF_ constants 2006-07-02 13:58:47 -07:00
smp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
smu.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
socket.h [AF_UNIX]: Datagram getpeersec 2006-06-29 16:58:06 -07:00
sockios.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
sparsemem.h [PATCH] powerpc: sanitize header files for user space includes 2006-01-09 15:13:08 +11:00
spinlock.h [POWERPC] Fix MMIO ops to provide expected barrier behaviour 2006-09-13 22:08:26 +10:00
spinlock_types.h [PATCH] powerpc: merge include/asm-ppc*/spinlock_types.h into include/asm-powerpc/spinlock_types.h 2005-09-21 19:21:09 +10:00
spu.h [POWERPC] Add new interrupt mapping core and change platforms to use it 2006-07-03 21:36:01 +10:00
spu_csa.h [POWERPC] spufs: one more fix for 64k pages 2006-06-21 15:01:32 +10:00
spu_priv1.h [POWERPC] spufs: fix spu irq affinity setting 2006-06-21 15:01:31 +10:00
sstep.h powerpc: Make single-stepping emulation (mostly) usable on 32-bit 2005-10-28 22:48:08 +10:00
stat.h powerpc: merge stat.h 2005-11-03 16:02:23 +11:00
statfs.h [PATCH] powerpc: merge include/asm-ppc*/statfs.h into include/asm-powerpc/statfs.h 2005-09-21 19:21:10 +10:00
string.h powerpc: fix strncasecmp prototype 2006-03-25 09:41:40 -08:00
synch.h [PATCH] powerpc: newline for ISYNC_ON_SMP 2006-02-24 14:06:00 +11:00
syscalls.h [PATCH] powerpc: declare arch syscalls in <asm/syscalls.h> 2006-03-27 14:48:22 +11:00
systbl.h [POWERPC] Unify ppc syscall tables 2006-06-21 15:01:32 +10:00
system.h [POWERPC] Fix gettimeofday inaccuracies 2006-08-23 15:51:18 +10:00
tce.h [PATCH] powerpc: kill union tce_entry 2006-04-29 18:07:54 +10:00
termbits.h [PATCH] Add CMSPAR to termbits.h for powerpc and alpha 2006-05-26 11:55:46 -07:00
termios.h powerpc: use asm-generic/termios.h 2005-11-01 14:36:55 +11:00
thread_info.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
time.h [POWERPC] Fix problem with time not advancing on 32-bit platforms 2006-08-30 16:09:43 +10:00
timex.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
tlb.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
tlbflush.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
todc.h [POWERPC] todc: add support for Time-Of-Day-Clock 2006-06-29 16:22:46 +10:00
topology.h [PATCH] sched: mc/smt power savings sched policy 2006-06-27 17:32:45 -07:00
tsi108.h [POWERPC] Update mpc7448hpc2 board irq support using device tree 2006-08-23 15:51:18 +10:00
tsi108_irq.h [POWERPC] Update mpc7448hpc2 board irq support using device tree 2006-08-23 15:51:18 +10:00
types.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
uaccess.h powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addresses 2006-05-03 23:06:46 +10:00
ucontext.h powerpc: merge ucontext.h 2005-11-03 16:59:17 +11:00
udbg.h [POWERPC] Add udbg support for RTAS console 2006-06-28 11:59:48 +10:00
unaligned.h [PATCH] powerpc: Standardize on _ASM_POWERPC header symbol prefix 2005-09-09 22:11:34 +10:00
uninorth.h powerpc: Merge various powermac-related header files. 2005-10-20 20:53:39 +10:00
unistd.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-24 09:22:21 +01:00
user.h [PATCH] powerpc: Merge a few more include files 2005-09-09 22:11:35 +10:00
vdso.h [PATCH] powerpc: Make the vDSO functions set error code (#2) 2005-11-16 14:05:11 +11:00
vdso_datapage.h [PATCH] powerpc: Kill _machine and hard-coded platform numbers 2006-03-28 23:15:54 +11:00
vga.h [PATCH] vgacon: make VGA_MAP_MEM take size, remove extra use 2006-06-22 15:05:58 -07:00
vio.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
xmon.h powerpc: Simplify and clean up the xmon terminal I/O 2005-11-08 22:55:08 +11:00
xor.h [PATCH] Move the identical files from include/asm-ppc{,64} 2005-08-30 13:32:05 +10:00