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[Qemu-devel] [PULL 11/46] hw: timer: Add ASPEED RTC device
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PULL 11/46] hw: timer: Add ASPEED RTC device |
Date: |
Mon, 1 Jul 2019 17:39:08 +0100 |
From: Joel Stanley <address@hidden>
The RTC is modeled to provide time and date functionality. It is
initialised at zero to match the hardware.
There is no modelling of the alarm functionality, which includes the IRQ
line. As there is no guest code to exercise this function that is
acceptable for now.
Signed-off-by: Joel Stanley <address@hidden>
Reviewed-by: Peter Maydell <address@hidden>
Message-id: address@hidden
Signed-off-by: Peter Maydell <address@hidden>
---
hw/timer/Makefile.objs | 2 +-
include/hw/timer/aspeed_rtc.h | 31 ++++++
hw/timer/aspeed_rtc.c | 180 ++++++++++++++++++++++++++++++++++
hw/timer/trace-events | 4 +
4 files changed, 216 insertions(+), 1 deletion(-)
create mode 100644 include/hw/timer/aspeed_rtc.h
create mode 100644 hw/timer/aspeed_rtc.c
diff --git a/hw/timer/Makefile.objs b/hw/timer/Makefile.objs
index 0e9a4530f84..123d92c9692 100644
--- a/hw/timer/Makefile.objs
+++ b/hw/timer/Makefile.objs
@@ -41,7 +41,7 @@ obj-$(CONFIG_MC146818RTC) += mc146818rtc.o
obj-$(CONFIG_ALLWINNER_A10_PIT) += allwinner-a10-pit.o
common-obj-$(CONFIG_STM32F2XX_TIMER) += stm32f2xx_timer.o
-common-obj-$(CONFIG_ASPEED_SOC) += aspeed_timer.o
+common-obj-$(CONFIG_ASPEED_SOC) += aspeed_timer.o aspeed_rtc.o
common-obj-$(CONFIG_SUN4V_RTC) += sun4v-rtc.o
common-obj-$(CONFIG_CMSDK_APB_TIMER) += cmsdk-apb-timer.o
diff --git a/include/hw/timer/aspeed_rtc.h b/include/hw/timer/aspeed_rtc.h
new file mode 100644
index 00000000000..1f1155a676c
--- /dev/null
+++ b/include/hw/timer/aspeed_rtc.h
@@ -0,0 +1,31 @@
+/*
+ * ASPEED Real Time Clock
+ * Joel Stanley <address@hidden>
+ *
+ * Copyright 2019 IBM Corp
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+#ifndef ASPEED_RTC_H
+#define ASPEED_RTC_H
+
+#include <stdint.h>
+
+#include "hw/hw.h"
+#include "hw/irq.h"
+#include "hw/sysbus.h"
+
+typedef struct AspeedRtcState {
+ SysBusDevice parent_obj;
+
+ MemoryRegion iomem;
+ qemu_irq irq;
+
+ uint32_t reg[0x18];
+ int offset;
+
+} AspeedRtcState;
+
+#define TYPE_ASPEED_RTC "aspeed.rtc"
+#define ASPEED_RTC(obj) OBJECT_CHECK(AspeedRtcState, (obj), TYPE_ASPEED_RTC)
+
+#endif /* ASPEED_RTC_H */
diff --git a/hw/timer/aspeed_rtc.c b/hw/timer/aspeed_rtc.c
new file mode 100644
index 00000000000..19f061c846e
--- /dev/null
+++ b/hw/timer/aspeed_rtc.c
@@ -0,0 +1,180 @@
+/*
+ * ASPEED Real Time Clock
+ * Joel Stanley <address@hidden>
+ *
+ * Copyright 2019 IBM Corp
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "qemu-common.h"
+#include "hw/timer/aspeed_rtc.h"
+#include "qemu/log.h"
+#include "qemu/timer.h"
+
+#include "trace.h"
+
+#define COUNTER1 (0x00 / 4)
+#define COUNTER2 (0x04 / 4)
+#define ALARM (0x08 / 4)
+#define CONTROL (0x10 / 4)
+#define ALARM_STATUS (0x14 / 4)
+
+#define RTC_UNLOCKED BIT(1)
+#define RTC_ENABLED BIT(0)
+
+static void aspeed_rtc_calc_offset(AspeedRtcState *rtc)
+{
+ struct tm tm;
+ uint32_t year, cent;
+ uint32_t reg1 = rtc->reg[COUNTER1];
+ uint32_t reg2 = rtc->reg[COUNTER2];
+
+ tm.tm_mday = (reg1 >> 24) & 0x1f;
+ tm.tm_hour = (reg1 >> 16) & 0x1f;
+ tm.tm_min = (reg1 >> 8) & 0x3f;
+ tm.tm_sec = (reg1 >> 0) & 0x3f;
+
+ cent = (reg2 >> 16) & 0x1f;
+ year = (reg2 >> 8) & 0x7f;
+ tm.tm_mon = ((reg2 >> 0) & 0x0f) - 1;
+ tm.tm_year = year + (cent * 100) - 1900;
+
+ rtc->offset = qemu_timedate_diff(&tm);
+}
+
+static uint32_t aspeed_rtc_get_counter(AspeedRtcState *rtc, int r)
+{
+ uint32_t year, cent;
+ struct tm now;
+
+ qemu_get_timedate(&now, rtc->offset);
+
+ switch (r) {
+ case COUNTER1:
+ return (now.tm_mday << 24) | (now.tm_hour << 16) |
+ (now.tm_min << 8) | now.tm_sec;
+ case COUNTER2:
+ cent = (now.tm_year + 1900) / 100;
+ year = now.tm_year % 100;
+ return ((cent & 0x1f) << 16) | ((year & 0x7f) << 8) |
+ ((now.tm_mon + 1) & 0xf);
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static uint64_t aspeed_rtc_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ AspeedRtcState *rtc = opaque;
+ uint64_t val;
+ uint32_t r = addr >> 2;
+
+ switch (r) {
+ case COUNTER1:
+ case COUNTER2:
+ if (rtc->reg[CONTROL] & RTC_ENABLED) {
+ rtc->reg[r] = aspeed_rtc_get_counter(rtc, r);
+ }
+ /* fall through */
+ case CONTROL:
+ val = rtc->reg[r];
+ break;
+ case ALARM:
+ case ALARM_STATUS:
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx "\n", __func__, addr);
+ return 0;
+ }
+
+ trace_aspeed_rtc_read(addr, val);
+
+ return val;
+}
+
+static void aspeed_rtc_write(void *opaque, hwaddr addr,
+ uint64_t val, unsigned size)
+{
+ AspeedRtcState *rtc = opaque;
+ uint32_t r = addr >> 2;
+
+ switch (r) {
+ case COUNTER1:
+ case COUNTER2:
+ if (!(rtc->reg[CONTROL] & RTC_UNLOCKED)) {
+ break;
+ }
+ /* fall through */
+ case CONTROL:
+ rtc->reg[r] = val;
+ aspeed_rtc_calc_offset(rtc);
+ break;
+ case ALARM:
+ case ALARM_STATUS:
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: 0x%" HWADDR_PRIx "\n", __func__, addr);
+ break;
+ }
+ trace_aspeed_rtc_write(addr, val);
+}
+
+static void aspeed_rtc_reset(DeviceState *d)
+{
+ AspeedRtcState *rtc = ASPEED_RTC(d);
+
+ rtc->offset = 0;
+ memset(rtc->reg, 0, sizeof(rtc->reg));
+}
+
+static const MemoryRegionOps aspeed_rtc_ops = {
+ .read = aspeed_rtc_read,
+ .write = aspeed_rtc_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static const VMStateDescription vmstate_aspeed_rtc = {
+ .name = TYPE_ASPEED_RTC,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32_ARRAY(reg, AspeedRtcState, 0x18),
+ VMSTATE_INT32(offset, AspeedRtcState),
+ VMSTATE_INT32(offset, AspeedRtcState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void aspeed_rtc_realize(DeviceState *dev, Error **errp)
+{
+ SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+ AspeedRtcState *s = ASPEED_RTC(dev);
+
+ sysbus_init_irq(sbd, &s->irq);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_rtc_ops, s,
+ "aspeed-rtc", 0x18ULL);
+ sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static void aspeed_rtc_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ dc->realize = aspeed_rtc_realize;
+ dc->vmsd = &vmstate_aspeed_rtc;
+ dc->reset = aspeed_rtc_reset;
+}
+
+static const TypeInfo aspeed_rtc_info = {
+ .name = TYPE_ASPEED_RTC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(AspeedRtcState),
+ .class_init = aspeed_rtc_class_init,
+};
+
+static void aspeed_rtc_register_types(void)
+{
+ type_register_static(&aspeed_rtc_info);
+}
+
+type_init(aspeed_rtc_register_types)
diff --git a/hw/timer/trace-events b/hw/timer/trace-events
index dcaf3d6da6c..db02a9142cd 100644
--- a/hw/timer/trace-events
+++ b/hw/timer/trace-events
@@ -66,6 +66,10 @@ cmsdk_apb_dualtimer_read(uint64_t offset, uint64_t data,
unsigned size) "CMSDK A
cmsdk_apb_dualtimer_write(uint64_t offset, uint64_t data, unsigned size)
"CMSDK APB dualtimer write: offset 0x%" PRIx64 " data 0x%" PRIx64 " size %u"
cmsdk_apb_dualtimer_reset(void) "CMSDK APB dualtimer: reset"
+# hw/timer/aspeed-rtc.c
+aspeed_rtc_read(uint64_t addr, uint64_t value) "addr 0x%02" PRIx64 " value
0x%08" PRIx64
+aspeed_rtc_write(uint64_t addr, uint64_t value) "addr 0x%02" PRIx64 " value
0x%08" PRIx64
+
# sun4v-rtc.c
sun4v_rtc_read(uint64_t addr, uint64_t value) "read: addr 0x%" PRIx64 " value
0x%" PRIx64
sun4v_rtc_write(uint64_t addr, uint64_t value) "write: addr 0x%" PRIx64 "
value 0x%" PRIx64
--
2.20.1
- [Qemu-devel] [PULL 32/46] target/arm: Add copyright boilerplate, (continued)
- [Qemu-devel] [PULL 32/46] target/arm: Add copyright boilerplate, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 19/46] aspeed: remove the "ram" link, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 20/46] aspeed: add a RAM memory region container, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 46/46] target/arm: Declare some M-profile functions publicly, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 24/46] aspeed: vic: Add support for legacy register interface, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 02/46] hw/arm/msf2-som: Exit when the cpu is not the expected one, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 38/46] target/arm: Declare get_phys_addr() function publicly, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 37/46] target/arm: Move CPU state dumping routines to cpu.c, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 06/46] pci: designware: Update MSI mapping unconditionally, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 21/46] aspeed/smc: add a 'sdram_base' property, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 11/46] hw: timer: Add ASPEED RTC device,
Peter Maydell <=
- [Qemu-devel] [PULL 15/46] aspeed/timer: Fix behaviour running Linux, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 03/46] hw/arm/virt: Add support for Cortex-A7, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 04/46] i.mx7d: Add no-op/unimplemented APBH DMA module, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 36/46] target/arm: Move the DC ZVA helper into op_helper, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 29/46] target/arm: Makefile cleanup (ARM), Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 05/46] i.mx7d: Add no-op/unimplemented PCIE PHY IP block, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 13/46] aspeed: introduce a configurable number of CPU per machine, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 07/46] pci: designware: Update MSI mapping when MSI address changes, Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 42/46] target/arm/vfp_helper: Extract vfp_set_fpscr_from_host(), Peter Maydell, 2019/07/01
- [Qemu-devel] [PULL 40/46] target/arm/vfp_helper: Move code around, Peter Maydell, 2019/07/01