diff options
Diffstat (limited to 'hw/intc/loongarch_pic_common.c')
| -rw-r--r-- | hw/intc/loongarch_pic_common.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/hw/intc/loongarch_pic_common.c b/hw/intc/loongarch_pic_common.c new file mode 100644 index 0000000..de17050 --- /dev/null +++ b/hw/intc/loongarch_pic_common.c @@ -0,0 +1,135 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * QEMU Loongson 7A1000 I/O interrupt controller. + * Copyright (C) 2024 Loongson Technology Corporation Limited + */ + +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "hw/intc/loongarch_pic_common.h" +#include "hw/qdev-properties.h" +#include "migration/vmstate.h" + +static int loongarch_pic_pre_save(void *opaque) +{ + LoongArchPICCommonState *s = (LoongArchPICCommonState *)opaque; + LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_GET_CLASS(s); + + if (lpcc->pre_save) { + return lpcc->pre_save(s); + } + + return 0; +} + +static int loongarch_pic_post_load(void *opaque, int version_id) +{ + LoongArchPICCommonState *s = (LoongArchPICCommonState *)opaque; + LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_GET_CLASS(s); + + if (lpcc->post_load) { + return lpcc->post_load(s, version_id); + } + + return 0; +} + +static void loongarch_pic_common_realize(DeviceState *dev, Error **errp) +{ + LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(dev); + + if (!s->irq_num || s->irq_num > VIRT_PCH_PIC_IRQ_NUM) { + error_setg(errp, "Invalid 'pic_irq_num'"); + return; + } +} + +static void loongarch_pic_common_reset_hold(Object *obj, ResetType type) +{ + LoongArchPICCommonState *s = LOONGARCH_PIC_COMMON(obj); + int i; + + /* + * With Loongson 7A1000 user manual + * Chapter 5.2 "Description of Interrupt-related Registers" + * + * Interrupt controller identification register 1 + * Bit 24-31 Interrupt Controller ID + * Interrupt controller identification register 2 + * Bit 0-7 Interrupt Controller version number + * Bit 16-23 The number of interrupt sources supported + */ + s->id.desc.id = PCH_PIC_INT_ID_VAL; + s->id.desc.version = PCH_PIC_INT_ID_VER; + s->id.desc.irq_num = s->irq_num - 1; + s->int_mask = UINT64_MAX; + s->htmsi_en = 0x0; + s->intedge = 0x0; + s->intclr = 0x0; + s->auto_crtl0 = 0x0; + s->auto_crtl1 = 0x0; + for (i = 0; i < 64; i++) { + s->route_entry[i] = 0x1; + s->htmsi_vector[i] = 0x0; + } + s->intirr = 0x0; + s->intisr = 0x0; + s->last_intirr = 0x0; + s->int_polarity = 0x0; +} + +static const Property loongarch_pic_common_properties[] = { + DEFINE_PROP_UINT32("pch_pic_irq_num", LoongArchPICCommonState, irq_num, 0), +}; + +static const VMStateDescription vmstate_loongarch_pic_common = { + .name = "loongarch_pch_pic", + .version_id = 1, + .minimum_version_id = 1, + .pre_save = loongarch_pic_pre_save, + .post_load = loongarch_pic_post_load, + .fields = (const VMStateField[]) { + VMSTATE_UINT64(int_mask, LoongArchPICCommonState), + VMSTATE_UINT64(htmsi_en, LoongArchPICCommonState), + VMSTATE_UINT64(intedge, LoongArchPICCommonState), + VMSTATE_UINT64(intclr, LoongArchPICCommonState), + VMSTATE_UINT64(auto_crtl0, LoongArchPICCommonState), + VMSTATE_UINT64(auto_crtl1, LoongArchPICCommonState), + VMSTATE_UINT8_ARRAY(route_entry, LoongArchPICCommonState, 64), + VMSTATE_UINT8_ARRAY(htmsi_vector, LoongArchPICCommonState, 64), + VMSTATE_UINT64(last_intirr, LoongArchPICCommonState), + VMSTATE_UINT64(intirr, LoongArchPICCommonState), + VMSTATE_UINT64(intisr, LoongArchPICCommonState), + VMSTATE_UINT64(int_polarity, LoongArchPICCommonState), + VMSTATE_END_OF_LIST() + } +}; + +static void loongarch_pic_common_class_init(ObjectClass *klass, + const void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + LoongArchPICCommonClass *lpcc = LOONGARCH_PIC_COMMON_CLASS(klass); + ResettableClass *rc = RESETTABLE_CLASS(klass); + + device_class_set_parent_realize(dc, loongarch_pic_common_realize, + &lpcc->parent_realize); + resettable_class_set_parent_phases(rc, NULL, + loongarch_pic_common_reset_hold, + NULL, &lpcc->parent_phases); + device_class_set_props(dc, loongarch_pic_common_properties); + dc->vmsd = &vmstate_loongarch_pic_common; +} + +static const TypeInfo loongarch_pic_common_types[] = { + { + .name = TYPE_LOONGARCH_PIC_COMMON, + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(LoongArchPICCommonState), + .class_size = sizeof(LoongArchPICCommonClass), + .class_init = loongarch_pic_common_class_init, + .abstract = true, + } +}; + +DEFINE_TYPES(loongarch_pic_common_types) |