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/*
* QEMU 8259 - common bits of emulated and KVM kernel model
*
* Copyright (c) 2003-2004 Fabrice Bellard
* Copyright (c) 2011 Jan Kiszka, Siemens AG
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "hw/intc/i8259.h"
#include "hw/isa/i8259_internal.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "monitor/monitor.h"
#include "qapi/error.h"
static int irq_level[16];
static uint64_t irq_count[16];
void pic_reset_common(PICCommonState *s)
{
s->last_irr = 0;
s->irr &= s->elcr;
s->imr = 0;
s->isr = 0;
s->priority_add = 0;
s->irq_base = 0;
s->read_reg_select = 0;
s->poll = 0;
s->special_mask = 0;
s->init_state = 0;
s->auto_eoi = 0;
s->rotate_on_auto_eoi = 0;
s->special_fully_nested_mode = 0;
s->init4 = 0;
s->single_mode = 0;
/* Note: ELCR and LTIM are not reset */
}
static int pic_dispatch_pre_save(void *opaque)
{
PICCommonState *s = opaque;
PICCommonClass *info = PIC_COMMON_GET_CLASS(s);
if (info->pre_save) {
info->pre_save(s);
}
return 0;
}
static int pic_dispatch_post_load(void *opaque, int version_id)
{
PICCommonState *s = opaque;
PICCommonClass *info = PIC_COMMON_GET_CLASS(s);
if (info->post_load) {
info->post_load(s);
}
return 0;
}
static void pic_common_realize(DeviceState *dev, Error **errp)
{
PICCommonState *s = PIC_COMMON(dev);
ISADevice *isa = ISA_DEVICE(dev);
isa_register_ioport(isa, &s->base_io, s->iobase);
if (s->elcr_addr != -1) {
isa_register_ioport(isa, &s->elcr_io, s->elcr_addr);
}
qdev_set_legacy_instance_id(dev, s->iobase, 1);
}
ISADevice *i8259_init_chip(const char *name, ISABus *bus, bool master)
{
DeviceState *dev;
ISADevice *isadev;
isadev = isa_new(name);
dev = DEVICE(isadev);
qdev_prop_set_uint32(dev, "iobase", master ? 0x20 : 0xa0);
qdev_prop_set_uint32(dev, "elcr_addr", master ? 0x4d0 : 0x4d1);
qdev_prop_set_uint8(dev, "elcr_mask", master ? 0xf8 : 0xde);
qdev_prop_set_bit(dev, "master", master);
isa_realize_and_unref(isadev, bus, &error_fatal);
return isadev;
}
void pic_stat_update_irq(int irq, int level)
{
if (level != irq_level[irq]) {
irq_level[irq] = level;
if (level == 1) {
irq_count[irq]++;
}
}
}
static bool pic_get_statistics(InterruptStatsProvider *obj,
uint64_t **irq_counts, unsigned int *nb_irqs)
{
PICCommonState *s = PIC_COMMON(obj);
if (s->master) {
*irq_counts = irq_count;
*nb_irqs = ARRAY_SIZE(irq_count);
} else {
*irq_counts = NULL;
*nb_irqs = 0;
}
return true;
}
static void pic_print_info(InterruptStatsProvider *obj, Monitor *mon)
{
PICCommonState *s = PIC_COMMON(obj);
pic_dispatch_pre_save(s);
monitor_printf(mon, "pic%d: irr=%02x imr=%02x isr=%02x hprio=%d "
"irq_base=%02x rr_sel=%d elcr=%02x fnm=%d\n",
s->master ? 0 : 1, s->irr, s->imr, s->isr, s->priority_add,
s->irq_base, s->read_reg_select, s->elcr,
s->special_fully_nested_mode);
}
static bool ltim_state_needed(void *opaque)
{
PICCommonState *s = PIC_COMMON(opaque);
return !!s->ltim;
}
static const VMStateDescription vmstate_pic_ltim = {
.name = "i8259/ltim",
.version_id = 1,
.minimum_version_id = 1,
.needed = ltim_state_needed,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(ltim, PICCommonState),
VMSTATE_END_OF_LIST()
}
};
static const VMStateDescription vmstate_pic_common = {
.name = "i8259",
.version_id = 1,
.minimum_version_id = 1,
.pre_save = pic_dispatch_pre_save,
.post_load = pic_dispatch_post_load,
.fields = (const VMStateField[]) {
VMSTATE_UINT8(last_irr, PICCommonState),
VMSTATE_UINT8(irr, PICCommonState),
VMSTATE_UINT8(imr, PICCommonState),
VMSTATE_UINT8(isr, PICCommonState),
VMSTATE_UINT8(priority_add, PICCommonState),
VMSTATE_UINT8(irq_base, PICCommonState),
VMSTATE_UINT8(read_reg_select, PICCommonState),
VMSTATE_UINT8(poll, PICCommonState),
VMSTATE_UINT8(special_mask, PICCommonState),
VMSTATE_UINT8(init_state, PICCommonState),
VMSTATE_UINT8(auto_eoi, PICCommonState),
VMSTATE_UINT8(rotate_on_auto_eoi, PICCommonState),
VMSTATE_UINT8(special_fully_nested_mode, PICCommonState),
VMSTATE_UINT8(init4, PICCommonState),
VMSTATE_UINT8(single_mode, PICCommonState),
VMSTATE_UINT8(elcr, PICCommonState),
VMSTATE_END_OF_LIST()
},
.subsections = (const VMStateDescription * const []) {
&vmstate_pic_ltim,
NULL
}
};
static Property pic_properties_common[] = {
DEFINE_PROP_UINT32("iobase", PICCommonState, iobase, -1),
DEFINE_PROP_UINT32("elcr_addr", PICCommonState, elcr_addr, -1),
DEFINE_PROP_UINT8("elcr_mask", PICCommonState, elcr_mask, -1),
DEFINE_PROP_BIT("master", PICCommonState, master, 0, false),
DEFINE_PROP_END_OF_LIST(),
};
static void pic_common_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
InterruptStatsProviderClass *ic = INTERRUPT_STATS_PROVIDER_CLASS(klass);
dc->vmsd = &vmstate_pic_common;
device_class_set_props(dc, pic_properties_common);
dc->realize = pic_common_realize;
/*
* Reason: unlike ordinary ISA devices, the PICs need additional
* wiring: its IRQ input lines are set up by board code, and the
* wiring of the slave to the master is hard-coded in device model
* code.
*/
dc->user_creatable = false;
ic->get_statistics = pic_get_statistics;
ic->print_info = pic_print_info;
}
static const TypeInfo pic_common_type = {
.name = TYPE_PIC_COMMON,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(PICCommonState),
.class_size = sizeof(PICCommonClass),
.class_init = pic_common_class_init,
.abstract = true,
.interfaces = (InterfaceInfo[]) {
{ TYPE_INTERRUPT_STATS_PROVIDER },
{ }
},
};
static void pic_common_register_types(void)
{
type_register_static(&pic_common_type);
}
type_init(pic_common_register_types)
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