qemu-e2k/include/hw/timer/aspeed_timer.h
Andrew Jeffery 1d3e65aa7a hw/timer: Add value matching support to aspeed_timer
Value matching allows Linux to boot with CONFIG_NO_HZ_IDLE=y on the
palmetto-bmc machine. Two match registers are provided for each timer.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Message-id: 1465974248-20434-1-git-send-email-andrew@aj.id.au
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-06-17 15:23:51 +01:00

61 lines
1.7 KiB
C

/*
* ASPEED AST2400 Timer
*
* Andrew Jeffery <andrew@aj.id.au>
*
* Copyright (C) 2016 IBM Corp.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef ASPEED_TIMER_H
#define ASPEED_TIMER_H
#include "qemu/timer.h"
#define ASPEED_TIMER(obj) \
OBJECT_CHECK(AspeedTimerCtrlState, (obj), TYPE_ASPEED_TIMER);
#define TYPE_ASPEED_TIMER "aspeed.timer"
#define ASPEED_TIMER_NR_TIMERS 8
typedef struct AspeedTimer {
qemu_irq irq;
uint8_t id;
QEMUTimer timer;
/**
* Track the line level as the ASPEED timers implement edge triggered
* interrupts, signalling with both the rising and falling edge.
*/
int32_t level;
uint32_t reload;
uint32_t match[2];
uint64_t start;
} AspeedTimer;
typedef struct AspeedTimerCtrlState {
/*< private >*/
SysBusDevice parent;
/*< public >*/
MemoryRegion iomem;
uint32_t ctrl;
uint32_t ctrl2;
AspeedTimer timers[ASPEED_TIMER_NR_TIMERS];
} AspeedTimerCtrlState;
#endif /* ASPEED_TIMER_H */