From: 黄涛 <huangtao@rock-chips.com>
Date: Mon, 7 Nov 2011 10:29:25 +0000 (+0800)
Subject: rk29: memory.h: use ARM_DMA_ZONE_SIZE to adjust the zone sizes
X-Git-Tag: firefly_0821_release~9748
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=64268f118fed27f82c013c4c7ffc88a61892075e;p=firefly-linux-kernel-4.4.55.git

rk29: memory.h: use ARM_DMA_ZONE_SIZE to adjust the zone sizes
---

diff --git a/arch/arm/mach-rk29/include/mach/memory.h b/arch/arm/mach-rk29/include/mach/memory.h
index bdbbf17a6862..4c95ac16bae9 100644
--- a/arch/arm/mach-rk29/include/mach/memory.h
+++ b/arch/arm/mach-rk29/include/mach/memory.h
@@ -27,10 +27,16 @@
 
 #if !defined(__ASSEMBLY__) && defined(CONFIG_ZONE_DMA)
 
+/*
+ * Restrict DMA-able region to workaround silicon bug. The bug
+ * restricts memory available for GPU hardware to be below 512M.
+ */
+#define ARM_DMA_ZONE_SIZE	SZ_512M
+
 static inline void
 __arch_adjust_zones(int node, unsigned long *zone_size, unsigned long *zhole_size)
 {
-	unsigned long dma_size = SZ_512M >> PAGE_SHIFT;
+	unsigned long dma_size = ARM_DMA_ZONE_SIZE >> PAGE_SHIFT;
 
 	if (node || (zone_size[0] <= dma_size))
 		return;