5dd85b4b48
Implement a model of the simple timer device found in the CMSDK. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1500029487-14822-5-git-send-email-peter.maydell@linaro.org
60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* ARM CMSDK APB timer emulation
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*
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* Copyright (c) 2017 Linaro Limited
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* Written by Peter Maydell
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 or
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* (at your option) any later version.
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*/
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#ifndef CMSDK_APB_TIMER_H
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#define CMSDK_APB_TIMER_H
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#include "hw/sysbus.h"
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#include "hw/ptimer.h"
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#define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer"
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#define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \
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TYPE_CMSDK_APB_TIMER)
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typedef struct {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion iomem;
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qemu_irq timerint;
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uint32_t pclk_frq;
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struct ptimer_state *timer;
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uint32_t ctrl;
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uint32_t value;
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uint32_t reload;
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uint32_t intstatus;
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} CMSDKAPBTIMER;
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/**
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* cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER
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* @addr: location in system memory to map registers
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* @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate)
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*/
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static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr,
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qemu_irq timerint,
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uint32_t pclk_frq)
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{
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DeviceState *dev;
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SysBusDevice *s;
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dev = qdev_create(NULL, TYPE_CMSDK_APB_TIMER);
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s = SYS_BUS_DEVICE(dev);
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qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq);
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qdev_init_nofail(dev);
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sysbus_mmio_map(s, 0, addr);
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sysbus_connect_irq(s, 0, timerint);
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return dev;
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}
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#endif
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