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 /* 13 * This is a model of the Arm PrimeCell PL022 synchronous serial port. 14 * The PL022 TRM is: 15 * https://developer.arm.com/documentation/ddi0194/latest 16 * 17 * QEMU interface: 18 * + sysbus IRQ: SSPINTR combined interrupt line 19 * + sysbus MMIO region 0: MemoryRegion for the device's registers 20 */ 21 22 #ifndef HW_SSI_PL022_H 23 #define HW_SSI_PL022_H 24 25 #include "hw/sysbus.h" 26 #include "qom/object.h" 27 28 #define TYPE_PL022 "pl022" 29 OBJECT_DECLARE_SIMPLE_TYPE(PL022State, PL022) 30 31 struct PL022State { 32 SysBusDevice parent_obj; 33 34 MemoryRegion iomem; 35 uint32_t cr0; 36 uint32_t cr1; 37 uint32_t bitmask; 38 uint32_t sr; 39 uint32_t cpsr; 40 uint32_t is; 41 uint32_t im; 42 /* The FIFO head points to the next empty entry. */ 43 int tx_fifo_head; 44 int rx_fifo_head; 45 int tx_fifo_len; 46 int rx_fifo_len; 47 uint16_t tx_fifo[8]; 48 uint16_t rx_fifo[8]; 49 qemu_irq irq; 50 SSIBus *ssi; 51 }; 52 53 #endif 54