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arm: bcm2835: DMA can only address 1GB

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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 <phil@raspberrypi.org>
This commit is contained in:
Phil Elwell
2019-05-29 15:47:42 +01:00
committed by Dom Cobley
parent 9816d9d27d
commit 71832f9ba8
1 changed files with 3 additions and 0 deletions
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3
arch/arm/mach-bcm/board_bcm2835.c
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@@ -114,6 +114,9 @@ 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,