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[1/5] ARM: keystone: enable DMA zone for LPAE

Message ID 1385250076-9596-2-git-send-email-santosh.shilimkar@ti.com (mailing list archive)
State New, archived
Headers show

Commit Message

Santosh Shilimkar Nov. 23, 2013, 11:41 p.m. UTC 
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 <santosh.shilimkar@ti.com>
---
 arch/arm/mach-keystone/Kconfig    |    1 +
 arch/arm/mach-keystone/keystone.c |    3 +++
 2 files changed, 4 insertions(+)
diff mbox

Patch

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,