From d7630da6f401a68644f8c5fa1ee3b39bcf60972f Mon Sep 17 00:00:00 2001
From: Lokesh Vutla <lokeshvutla@ti.com>
Date: Mon, 12 May 2014 13:49:33 +0530
Subject: [PATCH] ARM: OMAP: Fix omap_sdram_size calculation
Last section of DMM is used for trapping tiler unmapped sections.
Corresponding trap_size should be deducted from total SDRAM size
only if trap section is overlapping with available SDRAM
based on DMM sections. Fixing the same.
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---
arch/arm/cpu/armv7/omap-common/hwinit-common.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap-common/hwinit-common.c b/arch/arm/cpu/armv7/omap-common/hwinit-common.c
index 132454c7b4..ba97d9ec56 100644
--- a/arch/arm/cpu/armv7/omap-common/hwinit-common.c
+++ b/arch/arm/cpu/armv7/omap-common/hwinit-common.c
@@ -185,7 +185,7 @@ u32 omap_sdram_size(void)
{
u32 section, i, valid;
u64 sdram_start = 0, sdram_end = 0, addr,
- size, total_size = 0, trap_size = 0;
+ size, total_size = 0, trap_size = 0, trap_start = 0;
for (i = 0; i < 4; i++) {
section = __raw_readl(DMM_BASE + i*4);
@@ -208,12 +208,15 @@ u32 omap_sdram_size(void)
sdram_end = addr + size;
} else {
trap_size = size;
+ trap_start = addr;
}
-
}
-
}
- total_size = (sdram_end - sdram_start) - (trap_size);
+
+ if ((trap_start >= sdram_start) && (trap_start < sdram_end))
+ total_size = (sdram_end - sdram_start) - (trap_size);
+ else
+ total_size = sdram_end - sdram_start;
return total_size;
}
--
2.39.5