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authorPeter Maydell <peter.maydell@linaro.org>2017-07-17 13:36:08 +0100
committerPeter Maydell <peter.maydell@linaro.org>2017-07-17 13:36:08 +0100
commit5dd85b4b48653993335ca20d6e4d7b80129cca97 (patch)
treeef9895ad18b54fdb7c5dcf4024cd54e7d622e5c5 /include
parent977a15f4805b0fcc72243581fd9a4e4b6ac4d3b4 (diff)
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')
-rw-r--r--include/hw/timer/cmsdk-apb-timer.h59
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