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| author | Peter Maydell <peter.maydell@linaro.org> | 2017-07-17 13:36:08 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2017-07-17 13:36:08 +0100 |
| commit | 5dd85b4b48653993335ca20d6e4d7b80129cca97 (patch) | |
| tree | ef9895ad18b54fdb7c5dcf4024cd54e7d622e5c5 /include/hw/timer/cmsdk-apb-timer.h | |
| parent | 977a15f4805b0fcc72243581fd9a4e4b6ac4d3b4 (diff) | |
| download | focaccia-qemu-5dd85b4b48653993335ca20d6e4d7b80129cca97.tar.gz focaccia-qemu-5dd85b4b48653993335ca20d6e4d7b80129cca97.zip | |
hw/char/cmsdk-apb-timer: Implement CMSDK APB timer device
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
Diffstat (limited to 'include/hw/timer/cmsdk-apb-timer.h')
| -rw-r--r-- | include/hw/timer/cmsdk-apb-timer.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/include/hw/timer/cmsdk-apb-timer.h b/include/hw/timer/cmsdk-apb-timer.h new file mode 100644 index 0000000000..f21686d26b --- /dev/null +++ b/include/hw/timer/cmsdk-apb-timer.h @@ -0,0 +1,59 @@ +/* + * ARM CMSDK APB timer emulation + * + * Copyright (c) 2017 Linaro Limited + * Written by Peter Maydell + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 or + * (at your option) any later version. + */ + +#ifndef CMSDK_APB_TIMER_H +#define CMSDK_APB_TIMER_H + +#include "hw/sysbus.h" +#include "hw/ptimer.h" + +#define TYPE_CMSDK_APB_TIMER "cmsdk-apb-timer" +#define CMSDK_APB_TIMER(obj) OBJECT_CHECK(CMSDKAPBTIMER, (obj), \ + TYPE_CMSDK_APB_TIMER) + +typedef struct { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + qemu_irq timerint; + uint32_t pclk_frq; + struct ptimer_state *timer; + + uint32_t ctrl; + uint32_t value; + uint32_t reload; + uint32_t intstatus; +} CMSDKAPBTIMER; + +/** + * cmsdk_apb_timer_create - convenience function to create TYPE_CMSDK_APB_TIMER + * @addr: location in system memory to map registers + * @pclk_frq: frequency in Hz of the PCLK clock (used for calculating baud rate) + */ +static inline DeviceState *cmsdk_apb_timer_create(hwaddr addr, + qemu_irq timerint, + uint32_t pclk_frq) +{ + DeviceState *dev; + SysBusDevice *s; + + dev = qdev_create(NULL, TYPE_CMSDK_APB_TIMER); + s = SYS_BUS_DEVICE(dev); + qdev_prop_set_uint32(dev, "pclk-frq", pclk_frq); + qdev_init_nofail(dev); + sysbus_mmio_map(s, 0, addr); + sysbus_connect_irq(s, 0, timerint); + return dev; +} + +#endif |