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 26 #define TYPE_PL022 "pl022" 27 #define PL022(obj) OBJECT_CHECK(PL022State, (obj), TYPE_PL022) 28 29 typedef struct PL022State { 30 SysBusDevice parent_obj; 31 32 MemoryRegion iomem; 33 uint32_t cr0; 34 uint32_t cr1; 35 uint32_t bitmask; 36 uint32_t sr; 37 uint32_t cpsr; 38 uint32_t is; 39 uint32_t im; 40 /* The FIFO head points to the next empty entry. */ 41 int tx_fifo_head; 42 int rx_fifo_head; 43 int tx_fifo_len; 44 int rx_fifo_len; 45 uint16_t tx_fifo[8]; 46 uint16_t rx_fifo[8]; 47 qemu_irq irq; 48 SSIBus *ssi; 49 } PL022State; 50 51 #endif 52