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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
..
8xx_immap.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
amigahw.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
amigaints.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
amigappc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
amigayle.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
amipcmcia.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ans-lcd.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
bootinfo.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
bootx.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
btext.h [PATCH] powerpc: Unify udbg (#2) 2006-01-09 14:49:54 +11:00
commproc.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2006-05-06 19:59:18 +01:00
cpm2.h [PATCH] ppc32: board-specific part of fs_enet update 2006-08-19 17:44:31 -04:00
delay.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
floppy.h [PATCH] irq-flags: PPC: Use the new IRQF_ constants 2006-07-02 13:58:48 -07:00
gg2.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gt64260_defs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
gt64260.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
harrier.h [PATCH] powerpc: trivial: modify comments to refer to new location of files 2006-02-10 16:53:51 +11:00
hawk_defs.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hawk.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
highmem.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
hydra.h [PATCH] ppc trivial iomem annotations: chrp 2005-04-24 14:58:08 -07:00
ibm4xx.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ibm44x.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ibm403.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ibm405.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ibm_ocp_pci.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ibm_ocp.h [PATCH] ppc32: remove "jumbo" member from ocp_func_emac_data 2006-01-06 08:33:30 -08:00
immap_85xx.h [PATCH] Update email address for Kumar 2005-11-13 18:14:10 -08:00
immap_cpm2.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
io.h [POWERPC] Fix MMIO ops to provide expected barrier behaviour 2006-09-13 22:08:26 +10:00
kgdb.h [PATCH] ppc: Fix ARCH=ppc build with xmon 2005-11-08 11:19:48 +11:00
m48t35.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
m8260_pci.h [PATCH] ppc32: Support for 82xx PQII on-chip PCI bridge 2005-05-28 16:46:15 -07:00
machdep.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
md.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mk48t59.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mmu_context.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
mmu.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
mpc8xx.h [PATCH] ppc32: board-specific part of fs_enet update 2006-08-19 17:44:31 -04:00
mpc10x.h [PATCH] powerpc: trivial: modify comments to refer to new location of files 2006-02-10 16:53:51 +11:00
mpc52xx_psc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mpc52xx.h [PATCH] ppc32: Reorganize and complete MPC52xx initial cpu setup 2006-03-27 14:49:00 +11:00
mpc83xx.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
mpc85xx.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
mpc8260_pci9.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
mpc8260.h [PATCH] ppc32: board-specific part of fs_enet update 2006-08-19 17:44:31 -04:00
mv64x60_defs.h [PATCH] ppc32: mv64x60 updates & enhancements 2005-09-05 00:06:00 -07:00
mv64x60.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ocp_ids.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ocp.h [PATCH] devfs: Remove the devfs_fs_kernel.h file from the tree 2006-06-26 12:25:08 -07:00
open_pic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
page.h typo fixes: mecanism -> mechanism 2006-06-30 18:20:44 +02:00
pc_serial.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
pci-bridge.h [PATCH] powerpc: pci_address_to_pio fix 2006-01-09 15:05:56 +11:00
pci.h [PATCH] 64bit resource: change pci core and arch code to use resource_size_t 2006-06-27 09:24:00 -07:00
pgalloc.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
pgtable.h Merge git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-06-22 22:11:30 -07:00
pnp.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ppc4xx_dma.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ppc4xx_pic.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
ppc_sys.h [PATCH] ppc32: odd fixes and improvements in ppc_sys 2006-04-28 21:05:16 +10:00
ppcboot.h [PATCH] ppc32: cleanup AMCC PPC40x eval boards to support U-Boot 2005-11-07 07:53:26 -08:00
prep_nvram.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
prom.h ppc: Remove CHRP, POWER3 and POWER4 support from arch/ppc 2006-03-28 10:22:10 +11:00
raven.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
reg_booke.h [PATCH] ppc32: add 440GX erratum 440_43 workaround 2006-04-28 21:04:56 +10:00
residual.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rheap.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
rio.h [PATCH] RapidIO support: ppc32 2005-11-07 07:53:47 -08:00
rtc.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
serial.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
smp.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
spinlock.h [PATCH] powerpc: Fix building of power3 config on ppc32 2005-09-25 22:38:45 +10:00
suspend.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
system.h [PATCH] remove set_wmb - arch removal 2006-07-14 21:56:14 -07:00
time.h Don't include linux/config.h from anywhere else in include/ 2006-04-26 12:56:16 +01:00
todc.h [PATCH] powerpc: trivial: modify comments to refer to new location of files 2006-02-10 16:53:51 +11:00
traps.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
zorro.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00