38867d0b7e
Now no users are setting the frq properties on the CMSDK timer, dualtimer, watchdog or ARMSSE SoC devices, we can remove the properties and the struct fields that back them. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Luc Michel <luc@lmichel.fr> Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20210128114145.20536-25-peter.maydell@linaro.org Message-id: 20210121190622.22000-25-peter.maydell@linaro.org
69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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* ARM CMSDK APB watchdog emulation
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*
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* Copyright (c) 2018 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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/*
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* This is a model of the "APB watchdog" which is part of the Cortex-M
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* System Design Kit (CMSDK) and documented in the Cortex-M System
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* Design Kit Technical Reference Manual (ARM DDI0479C):
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* https://developer.arm.com/products/system-design/system-design-kits/cortex-m-system-design-kit
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*
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* QEMU interface:
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* + Clock input "WDOGCLK": clock for the watchdog's timer
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* + sysbus MMIO region 0: the register bank
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* + sysbus IRQ 0: watchdog interrupt
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*
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* In real hardware the watchdog's reset output is just a GPIO line
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* which can then be masked by the board or treated as a simple interrupt.
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* (For instance the IoTKit does this with the non-secure watchdog, so that
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* secure code can control whether non-secure code can perform a system
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* reset via its watchdog.) In QEMU, we just wire up the watchdog reset
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* to watchdog_perform_action(), at least for the moment.
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*/
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#ifndef CMSDK_APB_WATCHDOG_H
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#define CMSDK_APB_WATCHDOG_H
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#include "hw/sysbus.h"
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#include "hw/ptimer.h"
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#include "hw/clock.h"
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#include "qom/object.h"
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#define TYPE_CMSDK_APB_WATCHDOG "cmsdk-apb-watchdog"
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OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBWatchdog, CMSDK_APB_WATCHDOG)
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/*
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* This shares the same struct (and cast macro) as the base
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* cmsdk-apb-watchdog device.
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*/
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#define TYPE_LUMINARY_WATCHDOG "luminary-watchdog"
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struct CMSDKAPBWatchdog {
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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 wdogint;
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bool is_luminary;
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struct ptimer_state *timer;
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Clock *wdogclk;
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uint32_t control;
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uint32_t intstatus;
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uint32_t lock;
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uint32_t itcr;
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uint32_t itop;
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uint32_t resetstatus;
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const uint32_t *id;
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};
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#endif
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