1 /* 2 * ARM PrimeCell PL022 Synchronous Serial Port 3 * 4 * Copyright (c) 2007 CodeSourcery. 5 * Written by Paul Brook 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License version 2 or 9 * (at your option) any later version. 10 */ 11 12 /* This is a model of the Arm PrimeCell PL022 synchronous serial port. 13 * The PL022 TRM is: 14 * http://infocenter.arm.com/help/topic/com.arm.doc.ddi0194h/DDI0194H_ssp_pl022_trm.pdf 15 * 16 * QEMU interface: 17 * + sysbus IRQ: SSPINTR combined interrupt line 18 * + sysbus MMIO region 0: MemoryRegion for the device's registers 19 */ 20 21 #ifndef HW_SSI_PL022_H 22 #define HW_SSI_PL022_H 23 24 #include "hw/sysbus.h" 25 #include "qom/object.h" 26 27 #define TYPE_PL022 "pl022" 28 typedef struct PL022State PL022State; 29 DECLARE_INSTANCE_CHECKER(PL022State, PL022, 30 TYPE_PL022) 31 32 struct PL022State { 33 SysBusDevice parent_obj; 34 35 MemoryRegion iomem; 36 uint32_t cr0; 37 uint32_t cr1; 38 uint32_t bitmask; 39 uint32_t sr; 40 uint32_t cpsr; 41 uint32_t is; 42 uint32_t im; 43 /* The FIFO head points to the next empty entry. */ 44 int tx_fifo_head; 45 int rx_fifo_head; 46 int tx_fifo_len; 47 int rx_fifo_len; 48 uint16_t tx_fifo[8]; 49 uint16_t rx_fifo[8]; 50 qemu_irq irq; 51 SSIBus *ssi; 52 }; 53 54 #endif 55