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-rw-r--r--hw/intc/Kconfig3
-rw-r--r--hw/intc/goldfish_pic.c219
-rw-r--r--hw/intc/meson.build1
-rw-r--r--hw/intc/trace-events8
-rw-r--r--include/hw/intc/goldfish_pic.h33
5 files changed, 264 insertions, 0 deletions
diff --git a/hw/intc/Kconfig b/hw/intc/Kconfig
index 66bf0b90b4..186cb5daa0 100644
--- a/hw/intc/Kconfig
+++ b/hw/intc/Kconfig
@@ -67,3 +67,6 @@ config SIFIVE_CLINT
config SIFIVE_PLIC
bool
+
+config GOLDFISH_PIC
+ bool
diff --git a/hw/intc/goldfish_pic.c b/hw/intc/goldfish_pic.c
new file mode 100644
index 0000000000..e3b43a69f1
--- /dev/null
+++ b/hw/intc/goldfish_pic.c
@@ -0,0 +1,219 @@
+/*
+ * SPDX-License-Identifer: GPL-2.0-or-later
+ *
+ * Goldfish PIC
+ *
+ * (c) 2020 Laurent Vivier <laurent@vivier.eu>
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "hw/irq.h"
+#include "hw/qdev-properties.h"
+#include "hw/sysbus.h"
+#include "migration/vmstate.h"
+#include "monitor/monitor.h"
+#include "qemu/log.h"
+#include "trace.h"
+#include "hw/intc/intc.h"
+#include "hw/intc/goldfish_pic.h"
+
+/* registers */
+
+enum {
+ REG_STATUS = 0x00,
+ REG_IRQ_PENDING = 0x04,
+ REG_IRQ_DISABLE_ALL = 0x08,
+ REG_DISABLE = 0x0c,
+ REG_ENABLE = 0x10,
+};
+
+static bool goldfish_pic_get_statistics(InterruptStatsProvider *obj,
+ uint64_t **irq_counts,
+ unsigned int *nb_irqs)
+{
+ GoldfishPICState *s = GOLDFISH_PIC(obj);
+
+ *irq_counts = s->stats_irq_count;
+ *nb_irqs = ARRAY_SIZE(s->stats_irq_count);
+ return true;
+}
+
+static void goldfish_pic_print_info(InterruptStatsProvider *obj, Monitor *mon)
+{
+ GoldfishPICState *s = GOLDFISH_PIC(obj);
+ monitor_printf(mon, "goldfish-pic.%d: pending=0x%08x enabled=0x%08x\n",
+ s->idx, s->pending, s->enabled);
+}
+
+static void goldfish_pic_update(GoldfishPICState *s)
+{
+ if (s->pending & s->enabled) {
+ qemu_irq_raise(s->irq);
+ } else {
+ qemu_irq_lower(s->irq);
+ }
+}
+
+static void goldfish_irq_request(void *opaque, int irq, int level)
+{
+ GoldfishPICState *s = opaque;
+
+ trace_goldfish_irq_request(s, s->idx, irq, level);
+
+ if (level) {
+ s->pending |= 1 << irq;
+ s->stats_irq_count[irq]++;
+ } else {
+ s->pending &= ~(1 << irq);
+ }
+ goldfish_pic_update(s);
+}
+
+static uint64_t goldfish_pic_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ GoldfishPICState *s = opaque;
+ uint64_t value = 0;
+
+ switch (addr) {
+ case REG_STATUS:
+ /* The number of pending interrupts (0 to 32) */
+ value = ctpop32(s->pending & s->enabled);
+ break;
+ case REG_IRQ_PENDING:
+ /* The pending interrupt mask */
+ value = s->pending & s->enabled;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: unimplemented register read 0x%02"HWADDR_PRIx"\n",
+ __func__, addr);
+ break;
+ }
+
+ trace_goldfish_pic_read(s, s->idx, addr, size, value);
+
+ return value;
+}
+
+static void goldfish_pic_write(void *opaque, hwaddr addr,
+ uint64_t value, unsigned size)
+{
+ GoldfishPICState *s = opaque;
+
+ trace_goldfish_pic_write(s, s->idx, addr, size, value);
+
+ switch (addr) {
+ case REG_IRQ_DISABLE_ALL:
+ s->enabled = 0;
+ s->pending = 0;
+ break;
+ case REG_DISABLE:
+ s->enabled &= ~value;
+ break;
+ case REG_ENABLE:
+ s->enabled |= value;
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: unimplemented register write 0x%02"HWADDR_PRIx"\n",
+ __func__, addr);
+ break;
+ }
+ goldfish_pic_update(s);
+}
+
+static const MemoryRegionOps goldfish_pic_ops = {
+ .read = goldfish_pic_read,
+ .write = goldfish_pic_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+ .valid.max_access_size = 4,
+ .impl.min_access_size = 4,
+ .impl.max_access_size = 4,
+};
+
+static void goldfish_pic_reset(DeviceState *dev)
+{
+ GoldfishPICState *s = GOLDFISH_PIC(dev);
+ int i;
+
+ trace_goldfish_pic_reset(s, s->idx);
+ s->pending = 0;
+ s->enabled = 0;
+
+ for (i = 0; i < ARRAY_SIZE(s->stats_irq_count); i++) {
+ s->stats_irq_count[i] = 0;
+ }
+}
+
+static void goldfish_pic_realize(DeviceState *dev, Error **errp)
+{
+ GoldfishPICState *s = GOLDFISH_PIC(dev);
+
+ trace_goldfish_pic_realize(s, s->idx);
+
+ memory_region_init_io(&s->iomem, OBJECT(s), &goldfish_pic_ops, s,
+ "goldfish_pic", 0x24);
+}
+
+static const VMStateDescription vmstate_goldfish_pic = {
+ .name = "goldfish_pic",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(pending, GoldfishPICState),
+ VMSTATE_UINT32(enabled, GoldfishPICState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void goldfish_pic_instance_init(Object *obj)
+{
+ SysBusDevice *dev = SYS_BUS_DEVICE(obj);
+ GoldfishPICState *s = GOLDFISH_PIC(obj);
+
+ trace_goldfish_pic_instance_init(s);
+
+ sysbus_init_mmio(dev, &s->iomem);
+ sysbus_init_irq(dev, &s->irq);
+
+ qdev_init_gpio_in(DEVICE(obj), goldfish_irq_request, GOLDFISH_PIC_IRQ_NB);
+}
+
+static Property goldfish_pic_properties[] = {
+ DEFINE_PROP_UINT8("index", GoldfishPICState, idx, 0),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void goldfish_pic_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(oc);
+
+ dc->reset = goldfish_pic_reset;
+ dc->realize = goldfish_pic_realize;
+ dc->vmsd = &vmstate_goldfish_pic;
+ ic->get_statistics = goldfish_pic_get_statistics;
+ ic->print_info = goldfish_pic_print_info;
+ device_class_set_props(dc, goldfish_pic_properties);
+}
+
+static const TypeInfo goldfish_pic_info = {
+ .name = TYPE_GOLDFISH_PIC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .class_init = goldfish_pic_class_init,
+ .instance_init = goldfish_pic_instance_init,
+ .instance_size = sizeof(GoldfishPICState),
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_INTERRUPT_STATS_PROVIDER },
+ { }
+ },
+};
+
+static void goldfish_pic_register_types(void)
+{
+ type_register_static(&goldfish_pic_info);
+}
+
+type_init(goldfish_pic_register_types)
diff --git a/hw/intc/meson.build b/hw/intc/meson.build
index 8df3656419..5fcb923dd1 100644
--- a/hw/intc/meson.build
+++ b/hw/intc/meson.build
@@ -57,3 +57,4 @@ specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('xics_spapr.c', 'spapr_xi
specific_ss.add(when: 'CONFIG_XIVE', if_true: files('xive.c'))
specific_ss.add(when: ['CONFIG_KVM', 'CONFIG_XIVE'],
if_true: files('spapr_xive_kvm.c'))
+specific_ss.add(when: 'CONFIG_GOLDFISH_PIC', if_true: files('goldfish_pic.c'))
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index 45ddaf48df..c9ab17234b 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -239,3 +239,11 @@ xive_end_source_read(uint8_t end_blk, uint32_t end_idx, uint64_t addr) "END 0x%x
# pnv_xive.c
pnv_xive_ic_hw_trigger(uint64_t addr, uint64_t val) "@0x%"PRIx64" val=0x%"PRIx64
+
+# goldfish_pic.c
+goldfish_irq_request(void *dev, int idx, int irq, int level) "pic: %p goldfish-irq.%d irq: %d level: %d"
+goldfish_pic_read(void *dev, int idx, unsigned int addr, unsigned int size, uint64_t value) "pic: %p goldfish-irq.%d reg: 0x%02x size: %d value: 0x%"PRIx64
+goldfish_pic_write(void *dev, int idx, unsigned int addr, unsigned int size, uint64_t value) "pic: %p goldfish-irq.%d reg: 0x%02x size: %d value: 0x%"PRIx64
+goldfish_pic_reset(void *dev, int idx) "pic: %p goldfish-irq.%d"
+goldfish_pic_realize(void *dev, int idx) "pic: %p goldfish-irq.%d"
+goldfish_pic_instance_init(void *dev) "pic: %p goldfish-irq"
diff --git a/include/hw/intc/goldfish_pic.h b/include/hw/intc/goldfish_pic.h
new file mode 100644
index 0000000000..ad13ab37fc
--- /dev/null
+++ b/include/hw/intc/goldfish_pic.h
@@ -0,0 +1,33 @@
+/*
+ * SPDX-License-Identifer: GPL-2.0-or-later
+ *
+ * Goldfish PIC
+ *
+ * (c) 2020 Laurent Vivier <laurent@vivier.eu>
+ *
+ */
+
+#ifndef HW_INTC_GOLDFISH_PIC_H
+#define HW_INTC_GOLDFISH_PIC_H
+
+#define TYPE_GOLDFISH_PIC "goldfish_pic"
+OBJECT_DECLARE_SIMPLE_TYPE(GoldfishPICState, GOLDFISH_PIC)
+
+#define GOLDFISH_PIC_IRQ_NB 32
+
+struct GoldfishPICState {
+ SysBusDevice parent_obj;
+
+ MemoryRegion iomem;
+ qemu_irq irq;
+
+ uint32_t pending;
+ uint32_t enabled;
+
+ /* statistics */
+ uint64_t stats_irq_count[32];
+ /* for tracing */
+ uint8_t idx;
+};
+
+#endif
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-12-18 12:19:00 +0100