LOONGSON_HIGHMEM_START   17 arch/mips/include/asm/mach-loongson64/mem.h #define LOONGSON_HIGHMEM_START	0x20000000
LOONGSON_HIGHMEM_START   19 arch/mips/include/asm/mach-loongson64/mem.h #define LOONGSON_HIGHMEM_START	0x90000000