XCM_REG_XX_FREE
IDLE_CHK_1(0x1, XCM_REG_XX_FREE, (val != 31), IDLE_CHK_ERROR_NO_TRAFFIC, "XCM: XX_FREE differs from expected 31");
IDLE_CHK_1(0x1E, XCM_REG_XX_FREE, (val != 32), IDLE_CHK_ERROR_NO_TRAFFIC, "XCM: XX_FREE differs from expected 32");