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The netduino2 and netduinoplus2 boards forgot to set the system_clock_scale global, which meant that if guest code used the systick timer in "use the processor clock" mode it would hang because time never advances. Set the global to match the documented CPU clock speed of these boards. Judging by the data sheet this is slightly simplistic because the SoC allows configuration of the SYSCLK source and frequency via the RCC (reset and clock control) module, but we don't model that. Fixes: https://bugs.launchpad.net/qemu/+bug/1876187 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-id: 20200727162617.26227-1-peter.maydell@linaro.org
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/*
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* Netduino 2 Machine Model
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*
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* Copyright (c) 2014 Alistair Francis <alistair@alistair23.me>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/boards.h"
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#include "hw/qdev-properties.h"
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#include "qemu/error-report.h"
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#include "hw/arm/stm32f205_soc.h"
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#include "hw/arm/boot.h"
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/* Main SYSCLK frequency in Hz (120MHz) */
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#define SYSCLK_FRQ 120000000ULL
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static void netduino2_init(MachineState *machine)
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{
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DeviceState *dev;
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/*
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* TODO: ideally we would model the SoC RCC and let it handle
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* system_clock_scale, including its ability to define different
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* possible SYSCLK sources.
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*/
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system_clock_scale = NANOSECONDS_PER_SECOND / SYSCLK_FRQ;
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dev = qdev_new(TYPE_STM32F205_SOC);
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qdev_prop_set_string(dev, "cpu-type", ARM_CPU_TYPE_NAME("cortex-m3"));
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sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
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armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
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FLASH_SIZE);
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}
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static void netduino2_machine_init(MachineClass *mc)
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{
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mc->desc = "Netduino 2 Machine";
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mc->init = netduino2_init;
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mc->ignore_memory_transaction_failures = true;
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}
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DEFINE_MACHINE("netduino2", netduino2_machine_init)
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