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Commit 73499682 authored by Elizabeth Oldham's avatar Elizabeth Oldham Committed by Ralf Baechle
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[MIPS] Malta: Handle byteswapping hardare bug in big endian mode. 


    
The SOC-it system controller running in big endian mode might forget
byteswapping when DMAing to the last word of physical memory.  Fixed by
ignoring the last page of memory.
    
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 427abfa2

arch/mips/mips-boards/generic/memory.c

+9 −0
Original line number Diff line number Diff line
@@ -76,6 +76,15 @@ struct prom_pmemblock * __init prom_getmdesc(void) 
			memsize = simple_strtol(memsize_str, NULL, 0);

		}

	}



#ifdef CONFIG_CPU_BIG_ENDIAN

	/*

	 * SOC-it swaps, or perhaps doesn't swap, when DMA'ing the last

	 * word of physical memory

	 */

	memsize -= PAGE_SIZE;

#endif



	memset(mdesc, 0, sizeof(mdesc));



	mdesc[0].type = yamon_dontuse;