SL_R2              37 arch/powerpc/kernel/swsusp_32.S #define SL_R2		0xa8
SL_R2              34 arch/powerpc/kernel/swsusp_booke.S #define SL_R2		0x38
SL_R2              45 arch/powerpc/platforms/powermac/sleep.S #define SL_R2		0xa8