v1->v2:
1.use "cp0 register 5 sel 4" instead "cp0 config5 sel4".
2.use "write_c0_page_ctrl" instead "__asm__ ()".
3.use "XBURST_PAGECTRL_HPTLB_DIS" instead magic number "0xa9000000".
4.use switch to cleaner the code.