R600_BIOS_3_SCRATCH
reg = R600_BIOS_3_SCRATCH;
u32 tmp = RREG32(R600_BIOS_3_SCRATCH);
WREG32(R600_BIOS_3_SCRATCH, tmp);
bios_3_scratch = RREG32(R600_BIOS_3_SCRATCH);
WREG32(R600_BIOS_3_SCRATCH, bios_3_scratch);
bios_3_scratch = RREG32(R600_BIOS_3_SCRATCH);
WREG32(R600_BIOS_3_SCRATCH, bios_3_scratch);