2022-04-22 15:00:47 +00:00
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From a7fd907b5b54ae28b10471f7d08f36069b164733 Mon Sep 17 00:00:00 2001
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2021-11-24 17:32:01 +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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2022-04-22 15:00:47 +00:00
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Subject: [PATCH 143/828] arm: bcm2835: DMA can only address 1GB
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2021-11-24 17:32:01 +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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2022-04-22 15:00:47 +00:00
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@@ -114,6 +114,9 @@ static const char * const bcm2835_compat
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2021-11-24 17:32:01 +00:00
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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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