Commit 84a6fcb3 authored Feb 20, 2010 by Hauke Mehrtens Committed by Ralf Baechle Feb 22, 2010

MIPS: BCM47xx: Fix 128MB RAM support



Ignoring the last page when ddr size is 128M. Cached accesses to last page
is causing the processor to prefetch using address above 128M stepping out
of the DDR address space.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/981/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 52ab320a

arch/mips/bcm47xx/prom.c

+8 −0

Original line number	Original line	Diff line number	Diff line
	@@ -141,6 +141,14 @@ static __init void prom_init_mem(void)
	break;		break;
	}		}

			/* Ignoring the last page when ddr size is 128M. Cached
			* accesses to last page is causing the processor to prefetch
			* using address above 128M stepping out of the ddr address
			* space.
			*/
			if (mem == 0x8000000)
			mem -= 0x1000;

	add_memory_region(0, mem, BOOT_MEM_RAM);		add_memory_region(0, mem, BOOT_MEM_RAM);
	}		}