From 9334afe7293b3a78b7e070a70880b2db7aa98365 Mon Sep 17 00:00:00 2001 From: Phil Elwell Date: Wed, 29 May 2019 15:47:42 +0100 Subject: [PATCH] arm: bcm2835: DMA can only address 1GB The legacy peripherals can only address the first gigabyte of RAM, so ensure that DMA allocations are restricted to that region. Signed-off-by: Phil Elwell --- arch/arm/mach-bcm/board_bcm2835.c | 3 +++ 1 file changed, 3 insertions(+) --- a/arch/arm/mach-bcm/board_bcm2835.c +++ b/arch/arm/mach-bcm/board_bcm2835.c @@ -123,6 +123,9 @@ static const char * const bcm2835_compat }; DT_MACHINE_START(BCM2835, "BCM2835") +#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE) + .dma_zone_size = SZ_1G, +#endif .map_io = bcm2835_map_io, .init_machine = bcm2835_init, .dt_compat = bcm2835_compat,