2019-09-19 14:43:19 +00:00
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From 9334afe7293b3a78b7e070a70880b2db7aa98365 Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Wed, 29 May 2019 15:47:42 +0100
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2019-12-23 12:42:55 +00:00
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Subject: [PATCH] arm: bcm2835: DMA can only address 1GB
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2019-07-09 18:32:28 +00:00
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The legacy peripherals can only address the first gigabyte of RAM, so
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ensure that DMA allocations are restricted to that region.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/mach-bcm/board_bcm2835.c | 3 +++
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1 file changed, 3 insertions(+)
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--- a/arch/arm/mach-bcm/board_bcm2835.c
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+++ b/arch/arm/mach-bcm/board_bcm2835.c
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@@ -123,6 +123,9 @@ static const char * const bcm2835_compat
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};
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DT_MACHINE_START(BCM2835, "BCM2835")
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+#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
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+ .dma_zone_size = SZ_1G,
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+#endif
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.map_io = bcm2835_map_io,
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.init_machine = bcm2835_init,
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.dt_compat = bcm2835_compat,
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