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hw/timer/nrf51_timer: Add nRF51 Timer peripheral

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This patch adds the model for the nRF51 timer peripheral.
Currently, only the TIMER mode is implemented.

Signed-off-by: Steffen Görtz <contrib@steffen-goertz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 20190103091119.9367-9-stefanha@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Steffen Görtz 2019-01-07 15:23:47 +00:00 • committed by Peter Maydell
parent 17ff8e18cc
commit c5a4829c08
4 changed files with 479 additions and 0 deletions
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80
include/hw/timer/nrf51_timer.h Normal file
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/*
* nRF51 System-on-Chip Timer peripheral
*
* QEMU interface:
* + sysbus MMIO regions 0: GPIO registers
* + sysbus irq
*
* Copyright 2018 Steffen Görtz <contrib@steffen-goertz.de>
*
* This code is licensed under the GPL version 2 or later. See
* the COPYING file in the top-level directory.
*/
#ifndef NRF51_TIMER_H
#define NRF51_TIMER_H
#include "hw/sysbus.h"
#include "qemu/timer.h"
#define TYPE_NRF51_TIMER "nrf51_soc.timer"
#define NRF51_TIMER(obj) OBJECT_CHECK(NRF51TimerState, (obj), TYPE_NRF51_TIMER)
#define NRF51_TIMER_REG_COUNT 4
#define NRF51_TIMER_TASK_START 0x000
#define NRF51_TIMER_TASK_STOP 0x004
#define NRF51_TIMER_TASK_COUNT 0x008
#define NRF51_TIMER_TASK_CLEAR 0x00C
#define NRF51_TIMER_TASK_SHUTDOWN 0x010
#define NRF51_TIMER_TASK_CAPTURE_0 0x040
#define NRF51_TIMER_TASK_CAPTURE_3 0x04C
#define NRF51_TIMER_EVENT_COMPARE_0 0x140
#define NRF51_TIMER_EVENT_COMPARE_1 0x144
#define NRF51_TIMER_EVENT_COMPARE_2 0x148
#define NRF51_TIMER_EVENT_COMPARE_3 0x14C
#define NRF51_TIMER_REG_SHORTS 0x200
#define NRF51_TIMER_REG_SHORTS_MASK 0xf0f
#define NRF51_TIMER_REG_INTENSET 0x304
#define NRF51_TIMER_REG_INTENCLR 0x308
#define NRF51_TIMER_REG_INTEN_MASK 0xf0000
#define NRF51_TIMER_REG_MODE 0x504
#define NRF51_TIMER_REG_MODE_MASK 0x01
#define NRF51_TIMER_TIMER 0
#define NRF51_TIMER_COUNTER 1
#define NRF51_TIMER_REG_BITMODE 0x508
#define NRF51_TIMER_REG_BITMODE_MASK 0x03
#define NRF51_TIMER_WIDTH_16 0
#define NRF51_TIMER_WIDTH_8 1
#define NRF51_TIMER_WIDTH_24 2
#define NRF51_TIMER_WIDTH_32 3
#define NRF51_TIMER_REG_PRESCALER 0x510
#define NRF51_TIMER_REG_PRESCALER_MASK 0x0F
#define NRF51_TIMER_REG_CC0 0x540
#define NRF51_TIMER_REG_CC3 0x54C
typedef struct NRF51TimerState {
SysBusDevice parent_obj;
MemoryRegion iomem;
qemu_irq irq;
QEMUTimer timer;
int64_t timer_start_ns;
int64_t update_counter_ns;
uint32_t counter;
bool running;
uint8_t events_compare[NRF51_TIMER_REG_COUNT];
uint32_t cc[NRF51_TIMER_REG_COUNT];
uint32_t shorts;
uint32_t inten;
uint32_t mode;
uint32_t bitmode;
uint32_t prescaler;
} NRF51TimerState;
#endif