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-rw-r--r--arch/arm/mm/init.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index e5f6fc4..49eaad9 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -201,6 +201,20 @@ static void __init arm_bootmem_init(unsigned long start_pfn,
}
}
+#ifdef CONFIG_ZONE_DMA
+static void __init arm_adjust_dma_zone(unsigned long *size, unsigned long *hole,
+ unsigned long dma_size)
+{
+ if (size[0] <= dma_size)
+ return;
+
+ size[ZONE_NORMAL] = size[0] - dma_size;
+ size[ZONE_DMA] = dma_size;
+ hole[ZONE_NORMAL] = hole[0];
+ hole[ZONE_DMA] = 0;
+}
+#endif
+
static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
unsigned long max_high)
{
@@ -243,11 +257,18 @@ static void __init arm_bootmem_free(unsigned long min, unsigned long max_low,
#endif
}
+#ifdef ARM_DMA_ZONE_SIZE
+#ifndef CONFIG_ZONE_DMA
+#error ARM_DMA_ZONE_SIZE set but no DMA zone to limit allocations
+#endif
+
/*
* Adjust the sizes according to any special requirements for
* this machine type.
*/
- arch_adjust_zones(zone_size, zhole_size);
+ arm_adjust_dma_zone(zone_size, zhole_size,
+ ARM_DMA_ZONE_SIZE >> PAGE_SHIFT);
+#endif
free_area_init_node(0, zone_size, min, zhole_size);
}
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