cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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cmsdk-apb-watchdog.h (1990B)

      1/*
      2 * ARM CMSDK APB watchdog emulation
      3 *
      4 * Copyright (c) 2018 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/*
     13 * This is a model of the "APB watchdog" which is part of the Cortex-M
     14 * System Design Kit (CMSDK) and documented in the Cortex-M System
     15 * Design Kit Technical Reference Manual (ARM DDI0479C):
     16 * https://developer.arm.com/products/system-design/system-design-kits/cortex-m-system-design-kit
     17 *
     18 * QEMU interface:
     19 *  + Clock input "WDOGCLK": clock for the watchdog's timer
     20 *  + sysbus MMIO region 0: the register bank
     21 *  + sysbus IRQ 0: watchdog interrupt
     22 *
     23 * In real hardware the watchdog's reset output is just a GPIO line
     24 * which can then be masked by the board or treated as a simple interrupt.
     25 * (For instance the IoTKit does this with the non-secure watchdog, so that
     26 * secure code can control whether non-secure code can perform a system
     27 * reset via its watchdog.) In QEMU, we just wire up the watchdog reset
     28 * to watchdog_perform_action(), at least for the moment.
     29 */
     30
     31#ifndef CMSDK_APB_WATCHDOG_H
     32#define CMSDK_APB_WATCHDOG_H
     33
     34#include "hw/sysbus.h"
     35#include "hw/ptimer.h"
     36#include "hw/clock.h"
     37#include "qom/object.h"
     38
     39#define TYPE_CMSDK_APB_WATCHDOG "cmsdk-apb-watchdog"
     40OBJECT_DECLARE_SIMPLE_TYPE(CMSDKAPBWatchdog, CMSDK_APB_WATCHDOG)
     41
     42/*
     43 * This shares the same struct (and cast macro) as the base
     44 * cmsdk-apb-watchdog device.
     45 */
     46#define TYPE_LUMINARY_WATCHDOG "luminary-watchdog"
     47
     48struct CMSDKAPBWatchdog {
     49    /*< private >*/
     50    SysBusDevice parent_obj;
     51
     52    /*< public >*/
     53    MemoryRegion iomem;
     54    qemu_irq wdogint;
     55    bool is_luminary;
     56    struct ptimer_state *timer;
     57    Clock *wdogclk;
     58
     59    uint32_t control;
     60    uint32_t intstatus;
     61    uint32_t lock;
     62    uint32_t itcr;
     63    uint32_t itop;
     64    uint32_t resetstatus;
     65    const uint32_t *id;
     66};
     67
     68#endif