From df595a9d70fc3d1f4435b4a643bfaab9913c0ebd Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Sat, 23 Nov 2013 16:58:03 -0500 Subject: [PATCH] ARM: keystone: enable DMA zone for LPAE Keystone II peripheral devices support 32-bit DMA and hence can access only first 2GB of the memory address space. So set the platform dma_zone_size to handle that case. Signed-off-by: Santosh Shilimkar --- arch/arm/mach-keystone/Kconfig | 1 + arch/arm/mach-keystone/keystone.c | 3 +++ 2 files changed, 4 insertions(+) diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig index 8a9e943..dabc5ee 100644 --- a/arch/arm/mach-keystone/Kconfig +++ b/arch/arm/mach-keystone/Kconfig @@ -12,6 +12,7 @@ config ARCH_KEYSTONE select COMMON_CLK_KEYSTONE select TI_EDMA select ARCH_SUPPORTS_BIG_ENDIAN + select ZONE_DMA if ARM_LPAE help Support for boards based on the Texas Instruments Keystone family of SoCs. diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c index b661c5c..2fe4dd0 100644 --- a/arch/arm/mach-keystone/keystone.c +++ b/arch/arm/mach-keystone/keystone.c @@ -68,6 +68,9 @@ void keystone_restart(enum reboot_mode mode, const char *cmd) } DT_MACHINE_START(KEYSTONE, "Keystone") +#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) + .dma_zone_size = SZ_2G, +#endif .smp = smp_ops(keystone_smp_ops), .init_machine = keystone_init, .dt_compat = keystone_match, -- 2.7.4