From d05be883fc92f6f57ba1805ff2a99deb035557a2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Sun, 20 Oct 2019 01:47:02 +0200 Subject: hw/timer/bcm2835: Add the BCM2835 SYS_timer MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add the 64-bit free running timer. Do not model the COMPARE register (no IRQ generated). This timer is used by Linux kernel and recently U-Boot: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/clocksource/bcm2835_timer.c?h=v3.7 https://github.com/u-boot/u-boot/blob/v2019.07/include/configs/rpi.h#L19 Datasheet used: https://www.raspberrypi.org/app/uploads/2012/02/BCM2835-ARM-Peripherals.pdf Signed-off-by: Philippe Mathieu-Daudé Reviewed-by: Alistair Francis Message-id: 20191019234715.25750-4-f4bug@amsat.org [PMM: squashed in switch to using memset in reset] Signed-off-by: Peter Maydell --- include/hw/timer/bcm2835_systmr.h | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 include/hw/timer/bcm2835_systmr.h (limited to 'include/hw') diff --git a/include/hw/timer/bcm2835_systmr.h b/include/hw/timer/bcm2835_systmr.h new file mode 100644 index 0000000000..c0bc5c8127 --- /dev/null +++ b/include/hw/timer/bcm2835_systmr.h @@ -0,0 +1,33 @@ +/* + * BCM2835 SYS timer emulation + * + * Copyright (c) 2019 Philippe Mathieu-Daudé + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef BCM2835_SYSTIMER_H +#define BCM2835_SYSTIMER_H + +#include "hw/sysbus.h" +#include "hw/irq.h" + +#define TYPE_BCM2835_SYSTIMER "bcm2835-sys-timer" +#define BCM2835_SYSTIMER(obj) \ + OBJECT_CHECK(BCM2835SystemTimerState, (obj), TYPE_BCM2835_SYSTIMER) + +typedef struct { + /*< private >*/ + SysBusDevice parent_obj; + + /*< public >*/ + MemoryRegion iomem; + qemu_irq irq; + + struct { + uint32_t status; + uint32_t compare[4]; + } reg; +} BCM2835SystemTimerState; + +#endif -- cgit v1.2.3