Analogously to the APIC, we will reuse some parts of the user space
i8259 model for KVM. The base class provides a common device state, the
vmstate, the property list, a reset core and some shared init bits.
This also introduces a common helper to instantiate a single i8259 chip
from the cascade-creating i8259_init function.
Signed-off-by: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
---
Makefile.objs | 2 +-
hw/i8259.c | 158 ++++++++++-----------------------------------------
hw/i8259_common.c | 147 +++++++++++++++++++++++++++++++++++++++++++++++
hw/i8259_internal.h | 76 ++++++++++++++++++++++++
4 files changed, 254 insertions(+), 129 deletions(-)
create mode 100644 hw/i8259_common.c
create mode 100644 hw/i8259_internal.h
diff --git a/Makefile.objs b/Makefile.objs
index f753d83..39c994b 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -220,7 +220,7 @@ hw-obj-$(CONFIG_APPLESMC) += applesmc.o
hw-obj-$(CONFIG_SMARTCARD) += usb-ccid.o ccid-card-passthru.o
hw-obj-$(CONFIG_SMARTCARD_NSS) += ccid-card-emulated.o
hw-obj-$(CONFIG_USB_REDIR) += usb-redir.o
-hw-obj-$(CONFIG_I8259) += i8259.o
+hw-obj-$(CONFIG_I8259) += i8259_common.o i8259.o
# PPC devices
hw-obj-$(CONFIG_PREP_PCI) += prep_pci.o
diff --git a/hw/i8259.c b/hw/i8259.c
index cfaa35c..3005ce2 100644
--- a/hw/i8259.c
+++ b/hw/i8259.c
@@ -26,6 +26,7 @@
#include "isa.h"
#include "monitor.h"
#include "qemu-timer.h"
+#include "i8259_internal.h"
/* debug PIC */
//#define DEBUG_PIC
@@ -40,35 +41,6 @@
//#define DEBUG_IRQ_LATENCY
//#define DEBUG_IRQ_COUNT
-typedef struct PicState PicState;
-
-struct PicState {
- ISADevice dev;
- uint8_t last_irr; /* edge detection */
- uint8_t irr; /* interrupt request register */
- uint8_t imr; /* interrupt mask register */
- uint8_t isr; /* interrupt service register */
- uint8_t priority_add; /* highest irq priority */
- uint8_t irq_base;
- uint8_t read_reg_select;
- uint8_t poll;
- uint8_t special_mask;
- uint8_t init_state;
- uint8_t auto_eoi;
- uint8_t rotate_on_auto_eoi;
- uint8_t special_fully_nested_mode;
- uint8_t init4; /* true if 4 byte init */
- uint8_t single_mode; /* true if slave pic is not initialized */
- uint8_t elcr; /* PIIX edge/trigger selection*/
- uint8_t elcr_mask;
- qemu_irq int_out[1];
- uint32_t master; /* reflects /SP input pin */
- uint32_t iobase;
- uint32_t elcr_addr;
- MemoryRegion base_io;
- MemoryRegion elcr_io;
-};
-
#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT)
static int irq_level[16];
#endif
@@ -79,11 +51,11 @@ static uint64_t irq_count[16];
static int64_t irq_time[16];
#endif
DeviceState *isa_pic;
-static PicState *slave_pic;
+static PICCommonState *slave_pic;
/* return the highest priority found in mask (highest = smallest
number). Return 8 if no irq */
-static int get_priority(PicState *s, int mask)
+static int get_priority(PICCommonState *s, int mask)
{
int priority;
@@ -98,7 +70,7 @@ static int get_priority(PicState *s, int mask)
}
/* return the pic wanted interrupt. return -1 if none */
-static int pic_get_irq(PicState *s)
+static int pic_get_irq(PICCommonState *s)
{
int mask, cur_priority, priority;
@@ -127,7 +99,7 @@ static int pic_get_irq(PicState *s)
}
/* Update INT output. Must be called every time the output may have changed. */
-static void pic_update_irq(PicState *s)
+static void pic_update_irq(PICCommonState *s)
{
int irq;
@@ -144,7 +116,7 @@ static void pic_update_irq(PicState *s)
/* set irq level. If an edge is detected, then the IRR is set to 1 */
static void pic_set_irq(void *opaque, int irq, int level)
{
- PicState *s = opaque;
+ PICCommonState *s = opaque;
int mask = 1 << irq;
#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT) || \
@@ -192,7 +164,7 @@ static void pic_set_irq(void *opaque, int irq, int level)
}
/* acknowledge interrupt 'irq' */
-static void pic_intack(PicState *s, int irq)
+static void pic_intack(PICCommonState *s, int irq)
{
if (s->auto_eoi) {
if (s->rotate_on_auto_eoi) {
@@ -210,7 +182,7 @@ static void pic_intack(PicState *s, int irq)
int pic_read_irq(DeviceState *d)
{
- PicState *s = DO_UPCAST(PicState, dev.qdev, d);
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, d);
int irq, irq2, intno;
irq = pic_get_irq(s);
@@ -249,30 +221,15 @@ int pic_read_irq(DeviceState *d)
return intno;
}
-static void pic_init_reset(PicState *s)
+static void pic_init_reset(PICCommonState *s)
{
- s->last_irr = 0;
- s->irr = 0;
- 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 is not reset */
+ pic_reset_common(s);
pic_update_irq(s);
}
static void pic_reset(DeviceState *dev)
{
- PicState *s = DO_UPCAST(PicState, dev.qdev, dev);
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, dev);
pic_init_reset(s);
s->elcr = 0;
@@ -281,7 +238,7 @@ static void pic_reset(DeviceState *dev)
static void pic_ioport_write(void *opaque, target_phys_addr_t addr64,
uint64_t val64, unsigned size)
{
- PicState *s = opaque;
+ PICCommonState *s = opaque;
uint32_t addr = addr64;
uint32_t val = val64;
int priority, cmd, irq;
@@ -375,7 +332,7 @@ static void pic_ioport_write(void *opaque, target_phys_addr_t addr64,
static uint64_t pic_ioport_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
- PicState *s = opaque;
+ PICCommonState *s = opaque;
int ret;
if (s->poll) {
@@ -404,7 +361,7 @@ static uint64_t pic_ioport_read(void *opaque, target_phys_addr_t addr,
int pic_get_output(DeviceState *d)
{
- PicState *s = DO_UPCAST(PicState, dev.qdev, d);
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, d);
return (pic_get_irq(s) >= 0);
}
@@ -412,43 +369,17 @@ int pic_get_output(DeviceState *d)
static void elcr_ioport_write(void *opaque, target_phys_addr_t addr,
uint64_t val, unsigned size)
{
- PicState *s = opaque;
+ PICCommonState *s = opaque;
s->elcr = val & s->elcr_mask;
}
static uint64_t elcr_ioport_read(void *opaque, target_phys_addr_t addr,
unsigned size)
{
- PicState *s = opaque;
+ PICCommonState *s = opaque;
return s->elcr;
}
-static const VMStateDescription vmstate_pic = {
- .name = "i8259",
- .version_id = 1,
- .minimum_version_id = 1,
- .minimum_version_id_old = 1,
- .fields = (VMStateField[]) {
- VMSTATE_UINT8(last_irr, PicState),
- VMSTATE_UINT8(irr, PicState),
- VMSTATE_UINT8(imr, PicState),
- VMSTATE_UINT8(isr, PicState),
- VMSTATE_UINT8(priority_add, PicState),
- VMSTATE_UINT8(irq_base, PicState),
- VMSTATE_UINT8(read_reg_select, PicState),
- VMSTATE_UINT8(poll, PicState),
- VMSTATE_UINT8(special_mask, PicState),
- VMSTATE_UINT8(init_state, PicState),
- VMSTATE_UINT8(auto_eoi, PicState),
- VMSTATE_UINT8(rotate_on_auto_eoi, PicState),
- VMSTATE_UINT8(special_fully_nested_mode, PicState),
- VMSTATE_UINT8(init4, PicState),
- VMSTATE_UINT8(single_mode, PicState),
- VMSTATE_UINT8(elcr, PicState),
- VMSTATE_END_OF_LIST()
- }
-};
-
static const MemoryRegionOps pic_base_ioport_ops = {
.read = pic_ioport_read,
.write = pic_ioport_write,
@@ -467,36 +398,25 @@ static const MemoryRegionOps pic_elcr_ioport_ops = {
},
};
-static int pic_initfn(ISADevice *dev)
+static void pic_init(PICCommonState *s)
{
- PicState *s = DO_UPCAST(PicState, dev, dev);
-
memory_region_init_io(&s->base_io, &pic_base_ioport_ops, s, "pic", 2);
memory_region_init_io(&s->elcr_io, &pic_elcr_ioport_ops, s, "elcr", 1);
- isa_register_ioport(dev, &s->base_io, s->iobase);
- if (s->elcr_addr != -1) {
- isa_register_ioport(dev, &s->elcr_io, s->elcr_addr);
- }
-
- qdev_init_gpio_out(&dev->qdev, s->int_out, ARRAY_SIZE(s->int_out));
- qdev_init_gpio_in(&dev->qdev, pic_set_irq, 8);
-
- qdev_set_legacy_instance_id(&dev->qdev, s->iobase, 1);
-
- return 0;
+ qdev_init_gpio_out(&s->dev.qdev, s->int_out, ARRAY_SIZE(s->int_out));
+ qdev_init_gpio_in(&s->dev.qdev, pic_set_irq, 8);
}
void pic_info(Monitor *mon)
{
int i;
- PicState *s;
+ PICCommonState *s;
if (!isa_pic) {
return;
}
for (i = 0; i < 2; i++) {
- s = i == 0 ? DO_UPCAST(PicState, dev.qdev, isa_pic) : slave_pic;
+ s = i == 0 ? DO_UPCAST(PICCommonState, dev.qdev, isa_pic) : slave_pic;
monitor_printf(mon, "pic%d: irr=%02x imr=%02x isr=%02x hprio=%d "
"irq_base=%02x rr_sel=%d elcr=%02x fnm=%d\n",
i, s->irr, s->imr, s->isr, s->priority_add,
@@ -531,12 +451,7 @@ qemu_irq *i8259_init(ISABus *bus, qemu_irq parent_irq)
irq_set = g_malloc(ISA_NUM_IRQS * sizeof(qemu_irq));
- dev = isa_create(bus, "isa-i8259");
- qdev_prop_set_uint32(&dev->qdev, "iobase", 0x20);
- qdev_prop_set_uint32(&dev->qdev, "elcr_addr", 0x4d0);
- qdev_prop_set_uint8(&dev->qdev, "elcr_mask", 0xf8);
- qdev_prop_set_bit(&dev->qdev, "master", true);
- qdev_init_nofail(&dev->qdev);
+ dev = i8259_init_chip("isa-i8259", bus, true);
qdev_connect_gpio_out(&dev->qdev, 0, parent_irq);
for (i = 0 ; i < 8; i++) {
@@ -545,40 +460,27 @@ qemu_irq *i8259_init(ISABus *bus, qemu_irq parent_irq)
isa_pic = &dev->qdev;
- dev = isa_create(bus, "isa-i8259");
- qdev_prop_set_uint32(&dev->qdev, "iobase", 0xa0);
- qdev_prop_set_uint32(&dev->qdev, "elcr_addr", 0x4d1);
- qdev_prop_set_uint8(&dev->qdev, "elcr_mask", 0xde);
- qdev_init_nofail(&dev->qdev);
+ dev = i8259_init_chip("isa-i8259", bus, false);
qdev_connect_gpio_out(&dev->qdev, 0, irq_set[2]);
for (i = 0 ; i < 8; i++) {
irq_set[i + 8] = qdev_get_gpio_in(&dev->qdev, i);
}
- slave_pic = DO_UPCAST(PicState, dev, dev);
+ slave_pic = DO_UPCAST(PICCommonState, dev, dev);
return irq_set;
}
-static ISADeviceInfo i8259_info = {
- .qdev.name = "isa-i8259",
- .qdev.size = sizeof(PicState),
- .qdev.vmsd = &vmstate_pic,
- .qdev.reset = pic_reset,
- .qdev.no_user = 1,
- .init = pic_initfn,
- .qdev.props = (Property[]) {
- DEFINE_PROP_HEX32("iobase", PicState, iobase, -1),
- DEFINE_PROP_HEX32("elcr_addr", PicState, elcr_addr, -1),
- DEFINE_PROP_HEX8("elcr_mask", PicState, elcr_mask, -1),
- DEFINE_PROP_BIT("master", PicState, master, 0, false),
- DEFINE_PROP_END_OF_LIST(),
- },
+static PICCommonInfo i8259_info = {
+ .isadev.qdev.name = "isa-i8259",
+ .isadev.qdev.reset = pic_reset,
+ .init = pic_init,
};
static void pic_register(void)
{
- isa_qdev_register(&i8259_info);
+ pic_qdev_register(&i8259_info);
}
+
device_init(pic_register)
diff --git a/hw/i8259_common.c b/hw/i8259_common.c
new file mode 100644
index 0000000..e515876
--- /dev/null
+++ b/hw/i8259_common.c
@@ -0,0 +1,147 @@
+/*
+ * 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 "pc.h"
+#include "i8259_internal.h"
+
+void pic_reset_common(PICCommonState *s)
+{
+ s->last_irr = 0;
+ s->irr = 0;
+ 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 is not reset */
+}
+
+static void pic_dispatch_pre_save(void *opaque)
+{
+ PICCommonState *s = opaque;
+ PICCommonInfo *info =
+ DO_UPCAST(PICCommonInfo, isadev.qdev, s->dev.qdev.info);
+
+ if (info->pre_save) {
+ info->pre_save(s);
+ }
+}
+
+static int pic_dispatch_post_load(void *opaque, int version_id)
+{
+ PICCommonState *s = opaque;
+ PICCommonInfo *info =
+ DO_UPCAST(PICCommonInfo, isadev.qdev, s->dev.qdev.info);
+
+ if (info->post_load) {
+ info->post_load(s);
+ }
+ return 0;
+}
+
+static int pic_init_common(ISADevice *dev)
+{
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev, dev);
+ PICCommonInfo *info =
+ DO_UPCAST(PICCommonInfo, isadev.qdev, dev->qdev.info);
+
+ info->init(s);
+
+ isa_register_ioport(NULL, &s->base_io, s->iobase);
+ if (s->elcr_addr != -1) {
+ isa_register_ioport(NULL, &s->elcr_io, s->elcr_addr);
+ }
+
+ qdev_set_legacy_instance_id(&s->dev.qdev, s->iobase, 1);
+
+ return 0;
+}
+
+ISADevice *i8259_init_chip(const char *name, ISABus *bus, bool master)
+{
+ ISADevice *dev;
+
+ dev = isa_create(bus, name);
+ qdev_prop_set_uint32(&dev->qdev, "iobase", master ? 0x20 : 0xa0);
+ qdev_prop_set_uint32(&dev->qdev, "elcr_addr", master ? 0x4d0 : 0x4d1);
+ qdev_prop_set_uint8(&dev->qdev, "elcr_mask", master ? 0xf8 : 0xde);
+ qdev_prop_set_bit(&dev->qdev, "master", master);
+ qdev_init_nofail(&dev->qdev);
+
+ return dev;
+}
+
+static const VMStateDescription vmstate_pic_common = {
+ .name = "i8259",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .pre_save = pic_dispatch_pre_save,
+ .post_load = pic_dispatch_post_load,
+ .fields = (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()
+ }
+};
+
+static Property pic_properties_common[] = {
+ DEFINE_PROP_HEX32("iobase", PICCommonState, iobase, -1),
+ DEFINE_PROP_HEX32("elcr_addr", PICCommonState, elcr_addr, -1),
+ DEFINE_PROP_HEX8("elcr_mask", PICCommonState, elcr_mask, -1),
+ DEFINE_PROP_BIT("master", PICCommonState, master, 0, false),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+void pic_qdev_register(PICCommonInfo *info)
+{
+ info->isadev.init = pic_init_common;
+ info->isadev.qdev.size = sizeof(PICCommonState);
+ info->isadev.qdev.vmsd = &vmstate_pic_common;
+ info->isadev.qdev.no_user = 1;
+ info->isadev.qdev.props = pic_properties_common;
+ isa_qdev_register(&info->isadev);
+}
diff --git a/hw/i8259_internal.h b/hw/i8259_internal.h
new file mode 100644
index 0000000..13deb14
--- /dev/null
+++ b/hw/i8259_internal.h
@@ -0,0 +1,76 @@
+/*
+ * QEMU 8259 - internal interfaces
+ *
+ * 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.
+ */
+
+#ifndef QEMU_I8259_INTERNAL_H
+#define QEMU_I8259_INTERNAL_H
+
+#include "hw.h"
+#include "pc.h"
+#include "isa.h"
+
+typedef struct PICCommonState PICCommonState;
+
+struct PICCommonState {
+ ISADevice dev;
+ uint8_t last_irr; /* edge detection */
+ uint8_t irr; /* interrupt request register */
+ uint8_t imr; /* interrupt mask register */
+ uint8_t isr; /* interrupt service register */
+ uint8_t priority_add; /* highest irq priority */
+ uint8_t irq_base;
+ uint8_t read_reg_select;
+ uint8_t poll;
+ uint8_t special_mask;
+ uint8_t init_state;
+ uint8_t auto_eoi;
+ uint8_t rotate_on_auto_eoi;
+ uint8_t special_fully_nested_mode;
+ uint8_t init4; /* true if 4 byte init */
+ uint8_t single_mode; /* true if slave pic is not initialized */
+ uint8_t elcr; /* PIIX edge/trigger selection*/
+ uint8_t elcr_mask;
+ qemu_irq int_out[1];
+ uint32_t master; /* reflects /SP input pin */
+ uint32_t iobase;
+ uint32_t elcr_addr;
+ MemoryRegion base_io;
+ MemoryRegion elcr_io;
+};
+
+typedef struct PICCommonInfo PICCommonInfo;
+
+struct PICCommonInfo {
+ ISADeviceInfo isadev;
+ void (*init)(PICCommonState *s);
+ void (*pre_save)(PICCommonState *s);
+ void (*post_load)(PICCommonState *s);
+};
+
+void pic_reset_common(PICCommonState *s);
+
+ISADevice *i8259_init_chip(const char *name, ISABus *bus, bool master);
+
+void pic_qdev_register(PICCommonInfo *info);
+
+#endif /* !QEMU_I8259_INTERNAL_H */
--
1.7.3.4
--
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