2020-07-02 23:30:56 +08:00
|
|
|
From 67b31f71da2c251860dc6ddeffc5d15f8a74c675 Mon Sep 17 00:00:00 2001
|
2019-07-16 02:39:17 -07:00
|
|
|
From: Phil Elwell <phil@raspberrypi.org>
|
|
|
|
|
Date: Wed, 29 May 2019 15:47:42 +0100
|
2020-01-11 23:39:11 +08:00
|
|
|
Subject: [PATCH] arm: bcm2835: DMA can only address 1GB
|
2019-07-16 02:39:17 -07:00
|
|
|
|
|
|
|
|
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>
|
|
|
|
|
---
|
|
|
|
|
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
|
2020-07-02 23:30:56 +08:00
|
|
|
@@ -114,6 +114,9 @@ static const char * const bcm2835_compat
|
2019-07-16 02:39:17 -07:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
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,
|
