5bf6f1acdd
This is the initial commit of the SiFive PWM timer. This is used by guest software as a timer and is included in the SiFive FU540 SoC. Signed-off-by: Justin Restivo <jrestivo@draper.com> Signed-off-by: Alexandra Clifford <aclifford@draper.com> Signed-off-by: Amanda Strnad <astrnad@draper.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com> Message-id: 9f70a210acbfaf0e1ea6ad311ab892ac69134d8b.1631159656.git.alistair.francis@wdc.com
63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/*
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* SiFive PWM
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*
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* Copyright (c) 2020 Western Digital
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*
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* Author: Alistair Francis <alistair.francis@wdc.com>
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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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#ifndef HW_SIFIVE_PWM_H
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#define HW_SIFIVE_PWM_H
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#include "hw/sysbus.h"
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#include "qemu/timer.h"
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#include "qom/object.h"
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#define TYPE_SIFIVE_PWM "sifive-pwm"
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#define SIFIVE_PWM(obj) \
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OBJECT_CHECK(SiFivePwmState, (obj), TYPE_SIFIVE_PWM)
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#define SIFIVE_PWM_CHANS 4
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#define SIFIVE_PWM_IRQS SIFIVE_PWM_CHANS
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typedef struct SiFivePwmState {
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/* <private> */
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SysBusDevice parent_obj;
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/* <public> */
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MemoryRegion mmio;
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QEMUTimer timer[SIFIVE_PWM_CHANS];
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/*
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* if en bit(s) set, is the number of ticks when pwmcount was 0
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* if en bit(s) not set, is the number of ticks in pwmcount
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*/
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uint64_t tick_offset;
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uint64_t freq_hz;
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uint32_t pwmcfg;
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uint32_t pwmcmp[SIFIVE_PWM_CHANS];
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qemu_irq irqs[SIFIVE_PWM_IRQS];
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} SiFivePwmState;
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#endif /* HW_SIFIVE_PWM_H */
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