Commit 2b749cb3 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Linus Walleij
Browse files

ARM: realview: remove private barrier implementation 



The realview barrier implementation tries to avoid calling outer_sync in order
to not lock up as a result of a bug in the l220 cache controller.

This gets in the way of the multiplatform support, but we can still remove
it if we make sure that the outer_sync function never gets called, by replacing
the function pointer with NULL, right after initialization.

Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
[Fixed up header inclusions]
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 38541bf4

arch/arm/mach-realview/Kconfig

+0 −2
Original line number Diff line number Diff line
@@ -36,7 +36,6 @@ config REALVIEW_EB_A9MP 
config REALVIEW_EB_ARM11MP

	bool "Support ARM11MPCore Tile"

	depends on MACH_REALVIEW_EB

	select ARCH_HAS_BARRIERS if SMP

	select CPU_V6K

	select HAVE_ARM_SCU if SMP

	select HAVE_ARM_TWD if SMP
@@ -57,7 +56,6 @@ config REALVIEW_EB_ARM11MP_REVB 


config MACH_REALVIEW_PB11MP

	bool "Support RealView(R) Platform Baseboard for ARM11MPCore"

	select ARCH_HAS_BARRIERS if SMP

	select ARM_GIC

	select CPU_V6K

	select HAVE_ARM_SCU if SMP

arch/arm/mach-realview/include/mach/barriers.h

deleted100644 → 0
+0 −8
Original line number Diff line number Diff line 
/*

 * Barriers redefined for RealView ARM11MPCore platforms with L220 cache

 * controller to work around hardware errata causing the outer_sync()

 * operation to deadlock the system.

 */

#define mb()		dsb()

#define rmb()		dsb()

#define wmb()		mb()

arch/arm/mach-realview/realview_eb.c

+7 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 
#include <asm/hardware/cache-l2x0.h>

#include <asm/smp_twd.h>

#include <asm/system_info.h>

#include <asm/outercache.h>



#include <asm/mach/arch.h>

#include <asm/mach/map.h>
@@ -450,6 +451,12 @@ static void __init realview_eb_init(void) 
		 * Bits:  .... ...0 0111 1001 0000 .... .... ....

		 */

		l2x0_init(__io_address(REALVIEW_EB11MP_L220_BASE), 0x00790000, 0xfe000fff);



		/*

		 * due to a bug in the l220 cache controller, we must not call

		 * the sync function. stub it out here instead!

		 */

		outer_cache.sync = NULL;

#endif

		pmu_device.name = core_tile_a9mp() ? "armv7-pmu" : "armv6-pmu";

		platform_device_register(&pmu_device);

arch/arm/mach-realview/realview_pb11mp.c

+6 −0
Original line number Diff line number Diff line
@@ -42,6 +42,7 @@ 
#include <asm/mach/flash.h>

#include <asm/mach/map.h>

#include <asm/mach/time.h>

#include <asm/outercache.h>



#include <mach/board-pb11mp.h>

#include <mach/irqs.h>
@@ -345,6 +346,11 @@ static void __init realview_pb11mp_init(void) 
	 * Bits:  .... ...0 0111 1001 0000 .... .... ....

	 */

	l2x0_init(__io_address(REALVIEW_TC11MP_L220_BASE), 0x00790000, 0xfe000fff);

	/*

	 * due to a bug in the l220 cache controller, we must not call

	 * the sync function. stub it out here instead!

	 */

	outer_cache.sync = NULL;

#endif



	realview_flash_register(realview_pb11mp_flash_resource,

CRA Git | Maintained and supported by SUSTech CRA and CCSE