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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>
This commit is contained in:
Lokesh Vutla 2014-05-12 13:49:33 +05:30 committed by Tom Rini
parent d14c6335bc
commit d7630da6f4
1 changed files with 7 additions and 4 deletions
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11
arch/arm/cpu/armv7/omap-common/hwinit-common.c
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@ -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;
}