From 9a5b40b84279d60c0d93e5bb174fc9b49f901c91 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Wed, 6 Nov 2019 11:56:36 +0000 Subject: hw: rtc: Add Goldfish RTC device This patch adds model for Google Goldfish virtual platform RTC device. We will be adding Goldfish RTC device to the QEMU RISC-V virt machine for providing real date-time to Guest Linux. The corresponding Linux driver for Goldfish RTC device is already available in upstream Linux. For now, VM migration support is available but untested for Goldfish RTC device. It will be hardened in-future when we implement VM migration for KVM RISC-V. Signed-off-by: Anup Patel Reviewed-by: Alistair Francis Signed-off-by: Palmer Dabbelt --- include/hw/rtc/goldfish_rtc.h | 46 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 include/hw/rtc/goldfish_rtc.h (limited to 'include') diff --git a/include/hw/rtc/goldfish_rtc.h b/include/hw/rtc/goldfish_rtc.h new file mode 100644 index 0000000000..16f9f9e29d --- /dev/null +++ b/include/hw/rtc/goldfish_rtc.h @@ -0,0 +1,46 @@ +/* + * Goldfish virtual platform RTC + * + * Copyright (C) 2019 Western Digital Corporation or its affiliates. + * + * For more details on Google Goldfish virtual platform refer: + * https://android.googlesource.com/platform/external/qemu/+/master/docs/GOLDFISH-VIRTUAL-HARDWARE.TXT + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2 or later, as published by the Free Software Foundation. + * + * This program is distributed in the hope 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, see . + */ + +#ifndef HW_RTC_GOLDFISH_RTC_H +#define HW_RTC_GOLDFISH_RTC_H + +#include "hw/sysbus.h" + +#define TYPE_GOLDFISH_RTC "goldfish_rtc" +#define GOLDFISH_RTC(obj) \ + OBJECT_CHECK(GoldfishRTCState, (obj), TYPE_GOLDFISH_RTC) + +typedef struct GoldfishRTCState { + SysBusDevice parent_obj; + + MemoryRegion iomem; + QEMUTimer *timer; + qemu_irq irq; + + uint64_t tick_offset; + uint64_t tick_offset_vmstate; + uint64_t alarm_next; + uint32_t alarm_running; + uint32_t irq_pending; + uint32_t irq_enabled; +} GoldfishRTCState; + +#endif -- cgit v1.2.3 From 67b5ef30492b11c2a0f061b47773e45d87109a17 Mon Sep 17 00:00:00 2001 From: Anup Patel Date: Wed, 6 Nov 2019 11:56:43 +0000 Subject: riscv: virt: Use Goldfish RTC device We extend QEMU RISC-V virt machine by adding Goldfish RTC device to it. This will allow Guest Linux to sync it's local date/time with Host date/time via RTC device. Signed-off-by: Anup Patel Reviewed-by: Palmer Dabbelt Acked-by: Palmer Dabbelt Reviewed-by: Alistair Francis Signed-off-by: Palmer Dabbelt --- include/hw/riscv/virt.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include') diff --git a/include/hw/riscv/virt.h b/include/hw/riscv/virt.h index b17048a93a..e69355efaf 100644 --- a/include/hw/riscv/virt.h +++ b/include/hw/riscv/virt.h @@ -44,6 +44,7 @@ enum { VIRT_DEBUG, VIRT_MROM, VIRT_TEST, + VIRT_RTC, VIRT_CLINT, VIRT_PLIC, VIRT_UART0, @@ -57,6 +58,7 @@ enum { enum { UART0_IRQ = 10, + RTC_IRQ = 11, VIRTIO_IRQ = 1, /* 1 to 8 */ VIRTIO_COUNT = 8, PCIE_IRQ = 0x20, /* 32 to 35 */ -- cgit v1.2.3