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| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-06-06 01:38:08 +0200 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2015-07-25 16:28:16 +0200 |
| commit | 3fa609755c11fbe8770ede4d895ebb86fb7b9f1e (patch) | |
| tree | 2c3a41eaa397ee9bc53332fa921e497f05997a2f /arch/arm/mach-omap2/Kconfig | |
| parent | Revert "ARM: OMAP4: remove dead kconfig option OMAP4_ERRATA_I688" (diff) | |
| download | linux-3fa609755c11fbe8770ede4d895ebb86fb7b9f1e.tar.xz linux-3fa609755c11fbe8770ede4d895ebb86fb7b9f1e.zip | |
ARM: omap2: restore OMAP4 barrier behaviour
Restore the OMAP4 barrier behaviour using the new implementation which
allows multiplatform systems to hook into the mb() and wmb() ARM
implementations to perform any necessary additional barrier maintanence.
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Richard Woodruff <r-woodruff2@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mach-omap2/Kconfig')
| -rw-r--r-- | arch/arm/mach-omap2/Kconfig | 28 |
1 files changed, 7 insertions, 21 deletions
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig index 2128441430ad..8427997e09c4 100644 --- a/arch/arm/mach-omap2/Kconfig +++ b/arch/arm/mach-omap2/Kconfig @@ -29,6 +29,7 @@ config ARCH_OMAP4 select HAVE_ARM_SCU if SMP select HAVE_ARM_TWD if SMP select OMAP_INTERCONNECT + select OMAP_INTERCONNECT_BARRIER select PL310_ERRATA_588369 if CACHE_L2X0 select PL310_ERRATA_727915 if CACHE_L2X0 select PM_OPP if PM @@ -46,6 +47,7 @@ config SOC_OMAP5 select HAVE_ARM_TWD if SMP select HAVE_ARM_ARCH_TIMER select ARM_ERRATA_798181 if SMP + select OMAP_INTERCONNECT_BARRIER config SOC_AM33XX bool "TI AM33XX" @@ -70,6 +72,7 @@ config SOC_DRA7XX select HAVE_ARM_ARCH_TIMER select IRQ_CROSSBAR select ARM_ERRATA_798181 if SMP + select OMAP_INTERCONNECT_BARRIER config ARCH_OMAP2PLUS bool @@ -91,6 +94,10 @@ config ARCH_OMAP2PLUS help Systems based on OMAP2, OMAP3, OMAP4 or OMAP5 +config OMAP_INTERCONNECT_BARRIER + bool + select ARM_HEAVY_MB + if ARCH_OMAP2PLUS @@ -240,27 +247,6 @@ config OMAP3_SDRC_AC_TIMING wish to say no. Selecting yes without understanding what is going on could result in system crashes; -config OMAP4_ERRATA_I688 - bool "OMAP4 errata: Async Bridge Corruption" - depends on (ARCH_OMAP4 || SOC_OMAP5) && !ARCH_MULTIPLATFORM - select ARCH_HAS_BARRIERS - help - If a data is stalled inside asynchronous bridge because of back - pressure, it may be accepted multiple times, creating pointer - misalignment that will corrupt next transfers on that data path - until next reset of the system (No recovery procedure once the - issue is hit, the path remains consistently broken). Async bridge - can be found on path between MPU to EMIF and MPU to L3 interconnect. - This situation can happen only when the idle is initiated by a - Master Request Disconnection (which is trigged by software when - executing WFI on CPU). - The work-around for this errata needs all the initiators connected - through async bridge must ensure that data path is properly drained - before issuing WFI. This condition will be met if one Strongly ordered - access is performed to the target right before executing the WFI. - In MPU case, L3 T2ASYNC FIFO and DDR T2ASYNC FIFO needs to be drained. - IO barrier ensure that there is no synchronisation loss on initiators - operating on both interconnect port simultaneously. endmenu endif |