* [Qemu-devel] [0.14?][PATCH v2 1/4] ioapic: Implement EOI handling for level-triggered IRQs
2011-02-03 18:25 [Qemu-devel] [0.14?][PATCH v2 0/4] IOAPIC fixes Jan Kiszka
@ 2011-02-03 18:25 ` Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 2/4] ioapic: Save/restore irr Jan Kiszka
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Jan Kiszka @ 2011-02-03 18:25 UTC (permalink / raw)
To: qemu-devel, Anthony Liguori
Cc: kvm, Gleb Natapov, Marcelo Tosatti, Alexander Graf, Blue Swirl,
Avi Kivity
Add the missing EOI broadcast from local APIC to the IOAPICs on
completion of level-triggered IRQs. This ensures that a still asserted
IRQ source properly re-triggers an APIC IRQ.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
hw/apic.c | 9 ++++++---
hw/ioapic.c | 43 +++++++++++++++++++++++++++++++++++++++++--
hw/ioapic.h | 20 ++++++++++++++++++++
3 files changed, 67 insertions(+), 5 deletions(-)
create mode 100644 hw/ioapic.h
diff --git a/hw/apic.c b/hw/apic.c
index ff581f0..05a115f 100644
--- a/hw/apic.c
+++ b/hw/apic.c
@@ -18,6 +18,7 @@
*/
#include "hw.h"
#include "apic.h"
+#include "ioapic.h"
#include "qemu-timer.h"
#include "host-utils.h"
#include "sysbus.h"
@@ -57,7 +58,8 @@
#define ESR_ILLEGAL_ADDRESS (1 << 7)
-#define APIC_SV_ENABLE (1 << 8)
+#define APIC_SV_DIRECTED_IO (1<<12)
+#define APIC_SV_ENABLE (1<<8)
#define MAX_APICS 255
#define MAX_APIC_WORDS 8
@@ -420,8 +422,9 @@ static void apic_eoi(APICState *s)
if (isrv < 0)
return;
reset_bit(s->isr, isrv);
- /* XXX: send the EOI packet to the APIC bus to allow the I/O APIC to
- set the remote IRR bit for level triggered interrupts. */
+ if (!(s->spurious_vec & APIC_SV_DIRECTED_IO) && get_bit(s->tmr, isrv)) {
+ ioapic_eio_broadcast(isrv);
+ }
apic_update_irq(s);
}
diff --git a/hw/ioapic.c b/hw/ioapic.c
index 2109568..443c579 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -23,6 +23,7 @@
#include "hw.h"
#include "pc.h"
#include "apic.h"
+#include "ioapic.h"
#include "qemu-timer.h"
#include "host-utils.h"
#include "sysbus.h"
@@ -36,7 +37,10 @@
#define DPRINTF(fmt, ...)
#endif
-#define IOAPIC_LVT_MASKED (1<<16)
+#define MAX_IOAPICS 1
+
+#define IOAPIC_LVT_MASKED (1 << 16)
+#define IOAPIC_LVT_REMOTE_IRR (1 << 14)
#define IOAPIC_TRIGGER_EDGE 0
#define IOAPIC_TRIGGER_LEVEL 1
@@ -61,6 +65,8 @@ struct IOAPICState {
uint64_t ioredtbl[IOAPIC_NUM_PINS];
};
+static IOAPICState *ioapics[MAX_IOAPICS];
+
static void ioapic_service(IOAPICState *s)
{
uint8_t i;
@@ -83,8 +89,11 @@ static void ioapic_service(IOAPICState *s)
dest_mode = (entry >> 11) & 1;
delivery_mode = (entry >> 8) & 7;
polarity = (entry >> 13) & 1;
- if (trig_mode == IOAPIC_TRIGGER_EDGE)
+ if (trig_mode == IOAPIC_TRIGGER_EDGE) {
s->irr &= ~mask;
+ } else {
+ s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR;
+ }
if (delivery_mode == IOAPIC_DM_EXTINT)
vector = pic_read_irq(isa_pic);
else
@@ -131,6 +140,29 @@ static void ioapic_set_irq(void *opaque, int vector, int level)
}
}
+void ioapic_eio_broadcast(int vector)
+{
+ IOAPICState *s;
+ uint64_t entry;
+ int i, n;
+
+ for (i = 0; i < MAX_IOAPICS; i++) {
+ s = ioapics[i];
+ if (!s) {
+ continue;
+ }
+ for (n = 0; n < IOAPIC_NUM_PINS; n++) {
+ entry = s->ioredtbl[n];
+ if ((entry & IOAPIC_LVT_REMOTE_IRR) && (entry & 0xff) == vector) {
+ s->ioredtbl[n] = entry & ~IOAPIC_LVT_REMOTE_IRR;
+ if (!(entry & IOAPIC_LVT_MASKED) && (s->irr & (1 << n))) {
+ ioapic_service(s);
+ }
+ }
+ }
+ }
+}
+
static uint32_t ioapic_mem_readl(void *opaque, target_phys_addr_t addr)
{
IOAPICState *s = opaque;
@@ -240,6 +272,11 @@ static int ioapic_init1(SysBusDevice *dev)
{
IOAPICState *s = FROM_SYSBUS(IOAPICState, dev);
int io_memory;
+ static int ioapic_no;
+
+ if (ioapic_no >= MAX_IOAPICS) {
+ return -1;
+ }
io_memory = cpu_register_io_memory(ioapic_mem_read,
ioapic_mem_write, s,
@@ -248,6 +285,8 @@ static int ioapic_init1(SysBusDevice *dev)
qdev_init_gpio_in(&dev->qdev, ioapic_set_irq, IOAPIC_NUM_PINS);
+ ioapics[ioapic_no++] = s;
+
return 0;
}
diff --git a/hw/ioapic.h b/hw/ioapic.h
new file mode 100644
index 0000000..c441567
--- /dev/null
+++ b/hw/ioapic.h
@@ -0,0 +1,20 @@
+/*
+ * ioapic.c IOAPIC emulation logic
+ *
+ * Copyright (c) 2011 Jan Kiszka, Siemens AG
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+void ioapic_eio_broadcast(int vector);
--
1.7.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [Qemu-devel] [0.14?][PATCH v2 2/4] ioapic: Save/restore irr
2011-02-03 18:25 [Qemu-devel] [0.14?][PATCH v2 0/4] IOAPIC fixes Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 1/4] ioapic: Implement EOI handling for level-triggered IRQs Jan Kiszka
@ 2011-02-03 18:25 ` Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 3/4] ioapic: Prepare for base address relocation Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 4/4] ioapic: Style & magics cleanup Jan Kiszka
3 siblings, 0 replies; 5+ messages in thread
From: Jan Kiszka @ 2011-02-03 18:25 UTC (permalink / raw)
To: qemu-devel, Anthony Liguori
Cc: kvm, Gleb Natapov, Marcelo Tosatti, Alexander Graf, Blue Swirl,
Avi Kivity
This is a guest modifiable state that must be saved/restored properly.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
hw/ioapic.c | 15 ++++++++++++++-
1 files changed, 14 insertions(+), 1 deletions(-)
diff --git a/hw/ioapic.c b/hw/ioapic.c
index 443c579..edf99cc 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -231,14 +231,27 @@ static void ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t va
}
}
+static int ioapic_post_load(void *opaque, int version_id)
+{
+ IOAPICState *s = opaque;
+
+ if (version_id == 1) {
+ /* set sane values */
+ s->irr = 0;
+ }
+ return 0;
+}
+
static const VMStateDescription vmstate_ioapic = {
.name = "ioapic",
- .version_id = 1,
+ .version_id = 2,
+ .post_load = ioapic_post_load,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.fields = (VMStateField []) {
VMSTATE_UINT8(id, IOAPICState),
VMSTATE_UINT8(ioregsel, IOAPICState),
+ VMSTATE_UINT32_V(irr, IOAPICState, 2),
VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICState, IOAPIC_NUM_PINS),
VMSTATE_END_OF_LIST()
}
--
1.7.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [Qemu-devel] [0.14?][PATCH v2 3/4] ioapic: Prepare for base address relocation
2011-02-03 18:25 [Qemu-devel] [0.14?][PATCH v2 0/4] IOAPIC fixes Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 1/4] ioapic: Implement EOI handling for level-triggered IRQs Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 2/4] ioapic: Save/restore irr Jan Kiszka
@ 2011-02-03 18:25 ` Jan Kiszka
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 4/4] ioapic: Style & magics cleanup Jan Kiszka
3 siblings, 0 replies; 5+ messages in thread
From: Jan Kiszka @ 2011-02-03 18:25 UTC (permalink / raw)
To: qemu-devel, Anthony Liguori
Cc: kvm, Gleb Natapov, Marcelo Tosatti, Alexander Graf, Blue Swirl,
Avi Kivity
The registers of real IOAPICs can be relocated during runtime (via
chipset registers). We don't support this yet, but qemu-kvm carries the
current base address in its version 2 vmstate.
To align both implementations for migratability, add the proper
infrastructure to accept initial as well as updated base addresses and
include the current address in the vmstate. This is done in a way that
will also allow multiple IOAPICs in the future.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
hw/ioapic.c | 19 +++++++++++++++++++
hw/ioapic.h | 4 ++++
hw/pc_piix.c | 4 +---
3 files changed, 24 insertions(+), 3 deletions(-)
diff --git a/hw/ioapic.c b/hw/ioapic.c
index edf99cc..705803c 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -63,6 +63,8 @@ struct IOAPICState {
uint32_t irr;
uint64_t ioredtbl[IOAPIC_NUM_PINS];
+ uint64_t default_base_address;
+ uint64_t current_base_address;
};
static IOAPICState *ioapics[MAX_IOAPICS];
@@ -238,7 +240,9 @@ static int ioapic_post_load(void *opaque, int version_id)
if (version_id == 1) {
/* set sane values */
s->irr = 0;
+ s->current_base_address = s->default_base_address;
}
+ sysbus_mmio_map(&s->busdev, 0, s->current_base_address);
return 0;
}
@@ -251,17 +255,27 @@ static const VMStateDescription vmstate_ioapic = {
.fields = (VMStateField []) {
VMSTATE_UINT8(id, IOAPICState),
VMSTATE_UINT8(ioregsel, IOAPICState),
+ VMSTATE_UINT64_V(current_base_address, IOAPICState, 2),
VMSTATE_UINT32_V(irr, IOAPICState, 2),
VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICState, IOAPIC_NUM_PINS),
VMSTATE_END_OF_LIST()
}
};
+void ioapic_set_base_address(DeviceState *d, target_phys_addr_t addr)
+{
+ IOAPICState *s = DO_UPCAST(IOAPICState, busdev.qdev, d);
+
+ s->current_base_address = addr;
+ sysbus_mmio_map(&s->busdev, 0, addr);
+}
+
static void ioapic_reset(DeviceState *d)
{
IOAPICState *s = DO_UPCAST(IOAPICState, busdev.qdev, d);
int i;
+ ioapic_set_base_address(d, s->default_base_address);
s->id = 0;
s->ioregsel = 0;
s->irr = 0;
@@ -310,6 +324,11 @@ static SysBusDeviceInfo ioapic_info = {
.qdev.vmsd = &vmstate_ioapic,
.qdev.reset = ioapic_reset,
.qdev.no_user = 1,
+ .qdev.props = (Property[]) {
+ DEFINE_PROP_UINT64("default_base_address", IOAPICState,
+ default_base_address, IOAPIC_DEFAULT_BASE_ADDRESS),
+ DEFINE_PROP_END_OF_LIST()
+ }
};
static void ioapic_register_devices(void)
diff --git a/hw/ioapic.h b/hw/ioapic.h
index c441567..1130d60 100644
--- a/hw/ioapic.h
+++ b/hw/ioapic.h
@@ -17,4 +17,8 @@
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
+#define IOAPIC_DEFAULT_BASE_ADDRESS 0xfec00000
+
void ioapic_eio_broadcast(int vector);
+
+void ioapic_set_base_address(DeviceState *d, target_phys_addr_t addr);
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index 7b74473..82dce4c 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -25,6 +25,7 @@
#include "hw.h"
#include "pc.h"
#include "apic.h"
+#include "ioapic.h"
#include "pci.h"
#include "usb-uhci.h"
#include "usb-ohci.h"
@@ -46,13 +47,10 @@ static const int ide_irq[MAX_IDE_BUS] = { 14, 15 };
static void ioapic_init(IsaIrqState *isa_irq_state)
{
DeviceState *dev;
- SysBusDevice *d;
unsigned int i;
dev = qdev_create(NULL, "ioapic");
qdev_init_nofail(dev);
- d = sysbus_from_qdev(dev);
- sysbus_mmio_map(d, 0, 0xfec00000);
for (i = 0; i < IOAPIC_NUM_PINS; i++) {
isa_irq_state->ioapic[i] = qdev_get_gpio_in(dev, i);
--
1.7.1
^ permalink raw reply related [flat|nested] 5+ messages in thread* [Qemu-devel] [0.14?][PATCH v2 4/4] ioapic: Style & magics cleanup
2011-02-03 18:25 [Qemu-devel] [0.14?][PATCH v2 0/4] IOAPIC fixes Jan Kiszka
` (2 preceding siblings ...)
2011-02-03 18:25 ` [Qemu-devel] [0.14?][PATCH v2 3/4] ioapic: Prepare for base address relocation Jan Kiszka
@ 2011-02-03 18:25 ` Jan Kiszka
3 siblings, 0 replies; 5+ messages in thread
From: Jan Kiszka @ 2011-02-03 18:25 UTC (permalink / raw)
To: qemu-devel, Anthony Liguori
Cc: kvm, Gleb Natapov, Marcelo Tosatti, Alexander Graf, Blue Swirl,
Avi Kivity
Fix a few style issues and convert magic numbers into prober symbolic
constants, also fixing the wrong but unused IOAPIC_DM_SIPI value.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
hw/ioapic.c | 177 +++++++++++++++++++++++++++++++++++-----------------------
1 files changed, 107 insertions(+), 70 deletions(-)
diff --git a/hw/ioapic.c b/hw/ioapic.c
index 705803c..4f96caf 100644
--- a/hw/ioapic.c
+++ b/hw/ioapic.c
@@ -39,20 +39,48 @@
#define MAX_IOAPICS 1
-#define IOAPIC_LVT_MASKED (1 << 16)
-#define IOAPIC_LVT_REMOTE_IRR (1 << 14)
+#define IOAPIC_VERSION 0x11
-#define IOAPIC_TRIGGER_EDGE 0
-#define IOAPIC_TRIGGER_LEVEL 1
+#define IOAPIC_LVT_DEST_SHIFT 56
+#define IOAPIC_LVT_MASKED_SHIFT 16
+#define IOAPIC_LVT_TRIGGER_MODE_SHIFT 15
+#define IOAPIC_LVT_REMOTE_IRR_SHIFT 14
+#define IOAPIC_LVT_POLARITY_SHIFT 13
+#define IOAPIC_LVT_DELIV_STATUS_SHIFT 12
+#define IOAPIC_LVT_DEST_MODE_SHIFT 11
+#define IOAPIC_LVT_DELIV_MODE_SHIFT 8
+
+#define IOAPIC_LVT_MASKED (1 << IOAPIC_LVT_MASKED_SHIFT)
+#define IOAPIC_LVT_REMOTE_IRR (1 << IOAPIC_LVT_REMOTE_IRR_SHIFT)
+
+#define IOAPIC_TRIGGER_EDGE 0
+#define IOAPIC_TRIGGER_LEVEL 1
/*io{apic,sapic} delivery mode*/
-#define IOAPIC_DM_FIXED 0x0
-#define IOAPIC_DM_LOWEST_PRIORITY 0x1
-#define IOAPIC_DM_PMI 0x2
-#define IOAPIC_DM_NMI 0x4
-#define IOAPIC_DM_INIT 0x5
-#define IOAPIC_DM_SIPI 0x5
-#define IOAPIC_DM_EXTINT 0x7
+#define IOAPIC_DM_FIXED 0x0
+#define IOAPIC_DM_LOWEST_PRIORITY 0x1
+#define IOAPIC_DM_PMI 0x2
+#define IOAPIC_DM_NMI 0x4
+#define IOAPIC_DM_INIT 0x5
+#define IOAPIC_DM_SIPI 0x6
+#define IOAPIC_DM_EXTINT 0x7
+#define IOAPIC_DM_MASK 0x7
+
+#define IOAPIC_VECTOR_MASK 0xff
+
+#define IOAPIC_IOREGSEL 0x00
+#define IOAPIC_IOWIN 0x10
+
+#define IOAPIC_REG_ID 0x00
+#define IOAPIC_REG_VER 0x01
+#define IOAPIC_REG_ARB 0x02
+#define IOAPIC_REG_REDTBL_BASE 0x10
+#define IOAPIC_ID 0x00
+
+#define IOAPIC_ID_SHIFT 24
+#define IOAPIC_ID_MASK 0xf
+
+#define IOAPIC_VER_ENTRIES_SHIFT 16
typedef struct IOAPICState IOAPICState;
@@ -60,7 +88,6 @@ struct IOAPICState {
SysBusDevice busdev;
uint8_t id;
uint8_t ioregsel;
-
uint32_t irr;
uint64_t ioredtbl[IOAPIC_NUM_PINS];
uint64_t default_base_address;
@@ -86,21 +113,22 @@ static void ioapic_service(IOAPICState *s)
if (s->irr & mask) {
entry = s->ioredtbl[i];
if (!(entry & IOAPIC_LVT_MASKED)) {
- trig_mode = ((entry >> 15) & 1);
- dest = entry >> 56;
- dest_mode = (entry >> 11) & 1;
- delivery_mode = (entry >> 8) & 7;
- polarity = (entry >> 13) & 1;
+ trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1);
+ dest = entry >> IOAPIC_LVT_DEST_SHIFT;
+ dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1;
+ delivery_mode =
+ (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK;
+ polarity = (entry >> IOAPIC_LVT_POLARITY_SHIFT) & 1;
if (trig_mode == IOAPIC_TRIGGER_EDGE) {
s->irr &= ~mask;
} else {
s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR;
}
- if (delivery_mode == IOAPIC_DM_EXTINT)
+ if (delivery_mode == IOAPIC_DM_EXTINT) {
vector = pic_read_irq(isa_pic);
- else
- vector = entry & 0xff;
-
+ } else {
+ vector = entry & IOAPIC_VECTOR_MASK;
+ }
apic_deliver_irq(dest, dest_mode, delivery_mode,
vector, polarity, trig_mode);
}
@@ -116,15 +144,16 @@ static void ioapic_set_irq(void *opaque, int vector, int level)
* to GSI 2. GSI maps to ioapic 1-1. This is not
* the cleanest way of doing it but it should work. */
- DPRINTF("%s: %s vec %x\n", __func__, level? "raise" : "lower", vector);
- if (vector == 0)
+ DPRINTF("%s: %s vec %x\n", __func__, level ? "raise" : "lower", vector);
+ if (vector == 0) {
vector = 2;
-
+ }
if (vector >= 0 && vector < IOAPIC_NUM_PINS) {
uint32_t mask = 1 << vector;
uint64_t entry = s->ioredtbl[vector];
- if ((entry >> 15) & 1) {
+ if (((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1) ==
+ IOAPIC_TRIGGER_LEVEL) {
/* level triggered */
if (level) {
s->irr |= mask;
@@ -155,7 +184,8 @@ void ioapic_eio_broadcast(int vector)
}
for (n = 0; n < IOAPIC_NUM_PINS; n++) {
entry = s->ioredtbl[n];
- if ((entry & IOAPIC_LVT_REMOTE_IRR) && (entry & 0xff) == vector) {
+ if ((entry & IOAPIC_LVT_REMOTE_IRR)
+ && (entry & IOAPIC_VECTOR_MASK) == vector) {
s->ioredtbl[n] = entry & ~IOAPIC_LVT_REMOTE_IRR;
if (!(entry & IOAPIC_LVT_MASKED) && (s->irr & (1 << n))) {
ioapic_service(s);
@@ -171,65 +201,71 @@ static uint32_t ioapic_mem_readl(void *opaque, target_phys_addr_t addr)
int index;
uint32_t val = 0;
- addr &= 0xff;
- if (addr == 0x00) {
+ switch (addr & 0xff) {
+ case IOAPIC_IOREGSEL:
val = s->ioregsel;
- } else if (addr == 0x10) {
+ break;
+ case IOAPIC_IOWIN:
switch (s->ioregsel) {
- case 0x00:
- val = s->id << 24;
- break;
- case 0x01:
- val = 0x11 | ((IOAPIC_NUM_PINS - 1) << 16); /* version 0x11 */
- break;
- case 0x02:
- val = 0;
- break;
- default:
- index = (s->ioregsel - 0x10) >> 1;
- if (index >= 0 && index < IOAPIC_NUM_PINS) {
- if (s->ioregsel & 1)
- val = s->ioredtbl[index] >> 32;
- else
- val = s->ioredtbl[index] & 0xffffffff;
+ case IOAPIC_REG_ID:
+ val = s->id << IOAPIC_ID_SHIFT;
+ break;
+ case IOAPIC_REG_VER:
+ val = IOAPIC_VERSION |
+ ((IOAPIC_NUM_PINS - 1) << IOAPIC_VER_ENTRIES_SHIFT);
+ break;
+ case IOAPIC_REG_ARB:
+ val = 0;
+ break;
+ default:
+ index = (s->ioregsel - IOAPIC_REG_REDTBL_BASE) >> 1;
+ if (index >= 0 && index < IOAPIC_NUM_PINS) {
+ if (s->ioregsel & 1) {
+ val = s->ioredtbl[index] >> 32;
+ } else {
+ val = s->ioredtbl[index] & 0xffffffff;
}
+ }
}
DPRINTF("read: %08x = %08x\n", s->ioregsel, val);
+ break;
}
return val;
}
-static void ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
+static void
+ioapic_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t val)
{
IOAPICState *s = opaque;
int index;
- addr &= 0xff;
- if (addr == 0x00) {
+ switch (addr & 0xff) {
+ case IOAPIC_IOREGSEL:
s->ioregsel = val;
- return;
- } else if (addr == 0x10) {
+ break;
+ case IOAPIC_IOWIN:
DPRINTF("write: %08x = %08x\n", s->ioregsel, val);
switch (s->ioregsel) {
- case 0x00:
- s->id = (val >> 24) & 0xff;
- return;
- case 0x01:
- case 0x02:
- return;
- default:
- index = (s->ioregsel - 0x10) >> 1;
- if (index >= 0 && index < IOAPIC_NUM_PINS) {
- if (s->ioregsel & 1) {
- s->ioredtbl[index] &= 0xffffffff;
- s->ioredtbl[index] |= (uint64_t)val << 32;
- } else {
- s->ioredtbl[index] &= ~0xffffffffULL;
- s->ioredtbl[index] |= val;
- }
- ioapic_service(s);
+ case IOAPIC_REG_ID:
+ s->id = (val >> IOAPIC_ID_SHIFT) & IOAPIC_ID_MASK;
+ break;
+ case IOAPIC_REG_VER:
+ case IOAPIC_REG_ARB:
+ break;
+ default:
+ index = (s->ioregsel - IOAPIC_REG_REDTBL_BASE) >> 1;
+ if (index >= 0 && index < IOAPIC_NUM_PINS) {
+ if (s->ioregsel & 1) {
+ s->ioredtbl[index] &= 0xffffffff;
+ s->ioredtbl[index] |= (uint64_t)val << 32;
+ } else {
+ s->ioredtbl[index] &= ~0xffffffffULL;
+ s->ioredtbl[index] |= val;
}
+ ioapic_service(s);
+ }
}
+ break;
}
}
@@ -252,7 +288,7 @@ static const VMStateDescription vmstate_ioapic = {
.post_load = ioapic_post_load,
.minimum_version_id = 1,
.minimum_version_id_old = 1,
- .fields = (VMStateField []) {
+ .fields = (VMStateField[]) {
VMSTATE_UINT8(id, IOAPICState),
VMSTATE_UINT8(ioregsel, IOAPICState),
VMSTATE_UINT64_V(current_base_address, IOAPICState, 2),
@@ -279,8 +315,9 @@ static void ioapic_reset(DeviceState *d)
s->id = 0;
s->ioregsel = 0;
s->irr = 0;
- for(i = 0; i < IOAPIC_NUM_PINS; i++)
- s->ioredtbl[i] = 1 << 16; /* mask LVT */
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT;
+ }
}
static CPUReadMemoryFunc * const ioapic_mem_read[3] = {
--
1.7.1
^ permalink raw reply related [flat|nested] 5+ messages in thread