new file mode 100644
@@ -0,0 +1,41 @@
+/*
+ * SPDX-License-Identifer: GPL-2.0-or-later
+ *
+ * QEMU Motorola 680x0 IRQ Controller
+ *
+ * (c) 2020 Laurent Vivier <laurent@vivier.eu>
+ *
+ */
+
+#ifndef M68K_IRQC_H
+#define M68K_IRQC_H
+
+#include "hw/sysbus.h"
+
+#define TYPE_M68K_IRQC "m68k-irq-controller"
+#define M68K_IRQC(obj) OBJECT_CHECK(M68KIRQCState, (obj), \
+ TYPE_M68K_IRQC)
+
+#define M68K_IRQC_AUTOVECTOR_BASE 25
+
+enum {
+ M68K_IRQC_LEVEL_1 = 0,
+ M68K_IRQC_LEVEL_2,
+ M68K_IRQC_LEVEL_3,
+ M68K_IRQC_LEVEL_4,
+ M68K_IRQC_LEVEL_5,
+ M68K_IRQC_LEVEL_6,
+ M68K_IRQC_LEVEL_7,
+};
+#define M68K_IRQC_LEVEL_NUM (M68K_IRQC_LEVEL_7 - M68K_IRQC_LEVEL_1 + 1)
+
+typedef struct M68KIRQCState {
+ SysBusDevice parent_obj;
+
+ uint8_t ipr;
+
+ /* statistics */
+ uint64_t stats_irq_count[M68K_IRQC_LEVEL_NUM];
+} M68KIRQCState;
+
+#endif
new file mode 100644
@@ -0,0 +1,119 @@
+/*
+ * SPDX-License-Identifer: GPL-2.0-or-later
+ *
+ * QEMU Motorola 680x0 IRQ Controller
+ *
+ * (c) 2020 Laurent Vivier <laurent@vivier.eu>
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "cpu.h"
+#include "migration/vmstate.h"
+#include "monitor/monitor.h"
+#include "hw/nmi.h"
+#include "hw/intc/intc.h"
+#include "hw/intc/m68k_irqc.h"
+
+
+static bool m68k_irqc_get_statistics(InterruptStatsProvider *obj,
+ uint64_t **irq_counts, unsigned int *nb_irqs)
+{
+ M68KIRQCState *s = M68K_IRQC(obj);
+
+ *irq_counts = s->stats_irq_count;
+ *nb_irqs = ARRAY_SIZE(s->stats_irq_count);
+ return true;
+}
+
+static void m68k_irqc_print_info(InterruptStatsProvider *obj, Monitor *mon)
+{
+ M68KIRQCState *s = M68K_IRQC(obj);
+ monitor_printf(mon, "m68k-irqc: ipr=0x%x\n", s->ipr);
+}
+
+static void m68k_set_irq(void *opaque, int irq, int level)
+{
+ M68KIRQCState *s = opaque;
+ M68kCPU *cpu = M68K_CPU(first_cpu);
+ int i;
+
+ if (level) {
+ s->ipr |= 1 << irq;
+ s->stats_irq_count[irq]++;
+ } else {
+ s->ipr &= ~(1 << irq);
+ }
+
+ for (i = M68K_IRQC_LEVEL_7; i >= M68K_IRQC_LEVEL_1; i--) {
+ if ((s->ipr >> i) & 1) {
+ m68k_set_irq_level(cpu, i + 1, i + M68K_IRQC_AUTOVECTOR_BASE);
+ return;
+ }
+ }
+ m68k_set_irq_level(cpu, 0, 0);
+}
+
+static void m68k_irqc_reset(DeviceState *d)
+{
+ M68KIRQCState *s = M68K_IRQC(d);
+ int i;
+
+ s->ipr = 0;
+ for (i = 0; i < ARRAY_SIZE(s->stats_irq_count); i++) {
+ s->stats_irq_count[i] = 0;
+ }
+}
+
+static void m68k_irqc_instance_init(Object *obj)
+{
+ qdev_init_gpio_in(DEVICE(obj), m68k_set_irq, M68K_IRQC_LEVEL_NUM);
+}
+
+static void m68k_nmi(NMIState *n, int cpu_index, Error **errp)
+{
+ m68k_set_irq(n, M68K_IRQC_LEVEL_7, 1);
+}
+
+static const VMStateDescription vmstate_m68k_irqc = {
+ .name = "m68k-irqc",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT8(ipr, M68KIRQCState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void m68k_irqc_class_init(ObjectClass *oc, void *data)
+ {
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ NMIClass *nc = NMI_CLASS(oc);
+ InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(oc);
+
+ nc->nmi_monitor_handler = m68k_nmi;
+ dc->reset = m68k_irqc_reset;
+ dc->vmsd = &vmstate_m68k_irqc;
+ ic->get_statistics = m68k_irqc_get_statistics;
+ ic->print_info = m68k_irqc_print_info;
+}
+
+static const TypeInfo m68k_irqc_type_info = {
+ .name = TYPE_M68K_IRQC,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_size = sizeof(M68KIRQCState),
+ .instance_init = m68k_irqc_instance_init,
+ .class_init = m68k_irqc_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { TYPE_NMI },
+ { TYPE_INTERRUPT_STATS_PROVIDER },
+ { }
+ },
+};
+
+static void q800_irq_register_types(void)
+{
+ type_register_static(&m68k_irqc_type_info);
+}
+
+type_init(q800_irq_register_types);
@@ -67,3 +67,6 @@ config SIFIVE_PLIC
config GOLDFISH_PIC
bool
+
+config M68K_IRQC
+ bool
@@ -58,3 +58,4 @@ 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'))
+specific_ss.add(when: 'CONFIG_M68K_IRQC', if_true: files('m68k_irqc.c'))
A (generic) copy of the GLUE device we already have for q800 to use with the m68k-virt machine. The q800 one would disappear in the future as q800 uses actually the djMEMC controller. Signed-off-by: Laurent Vivier <laurent@vivier.eu> --- include/hw/intc/m68k_irqc.h | 41 +++++++++++++ hw/intc/m68k_irqc.c | 119 ++++++++++++++++++++++++++++++++++++ hw/intc/Kconfig | 3 + hw/intc/meson.build | 1 + 4 files changed, 164 insertions(+) create mode 100644 include/hw/intc/m68k_irqc.h create mode 100644 hw/intc/m68k_irqc.c