1 /* 2 * ARM CMSDK APB timer emulation 3 * 4 * Copyright (c) 2017 Linaro Limited 5 * Written by Peter Maydell 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 #ifndef CMSDK_APB_TIMER_H 13 #define CMSDK_APB_TIMER_H 14 15 #include "hw/sysbus.h" 16 #include "hw/ptimer.h" 17 18 #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer" 19 #define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \ 20 TYPE_CMSDK_APB_TIMER) 21 22 typedef struct { 23 /*< private >*/ 24 SysBusDevice parent_obj; 25 26 /*< public >*/ 27 MemoryRegion iomem; 28 qemu_irq timerint; 29 uint32_t pclk_frq; 30 struct ptimer_state *timer; 31 32 uint32_t ctrl; 33 uint32_t value; 34 uint32_t reload; 35 uint32_t intstatus; 36 } CMSDKAPBTIMER; 37 38 /** 39 * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER 40 * @addr: location in system memory to map registers 41 * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate) 42 */ 43 static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr, 44 qemu_irq timerint, 45 uint32_t pclk_frq) 46 { 47 DeviceState *dev; 48 SysBusDevice *s; 49 50 dev = qdev_create(NULL, TYPE_CMSDK_APB_TIMER); 51 s = SYS_BUS_DEVICE(dev); 52 qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq); 53 qdev_init_nofail(dev); 54 sysbus_mmio_map(s, 0, addr); 55 sysbus_connect_irq(s, 0, timerint); 56 return dev; 57 } 58 59 #endif 60