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/qdev-properties.h" 16 #include "hw/sysbus.h" 17 #include "hw/ptimer.h" 18 19 #define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer" 20 #define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \ 21 TYPE_CMSDK_APB_TIMER) 22 23 typedef struct { 24 /*< private >*/ 25 SysBusDevice parent_obj; 26 27 /*< public >*/ 28 MemoryRegion iomem; 29 qemu_irq timerint; 30 uint32_t pclk_frq; 31 struct ptimer_state *timer; 32 33 uint32_t ctrl; 34 uint32_t value; 35 uint32_t reload; 36 uint32_t intstatus; 37 } CMSDKAPBTIMER; 38 39 /** 40 * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER 41 * @addr: location in system memory to map registers 42 * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate) 43 */ 44 static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr, 45 qemu_irq timerint, 46 uint32_t pclk_frq) 47 { 48 DeviceState *dev; 49 SysBusDevice *s; 50 51 dev = qdev_new(TYPE_CMSDK_APB_TIMER); 52 s = SYS_BUS_DEVICE(dev); 53 qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq); 54 sysbus_realize_and_unref(s, &error_fatal); 55 sysbus_mmio_map(s, 0, addr); 56 sysbus_connect_irq(s, 0, timerint); 57 return dev; 58 } 59 60 #endif 61