#include "hw.h"
#include "pc.h"
+#include "apic.h"
+#include "ioapic.h"
#include "qemu-timer.h"
#include "host-utils.h"
+#include "sysbus.h"
//#define DEBUG_IOAPIC
-#define IOAPIC_NUM_PINS 0x18
-#define IOAPIC_LVT_MASKED (1<<16)
+#ifdef DEBUG_IOAPIC
+#define DPRINTF(fmt, ...) \
+ do { printf("ioapic: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...)
+#endif
+
+#define MAX_IOAPICS 1
+
+#define IOAPIC_VERSION 0x11
+
+#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_TRIGGER_EDGE 0
-#define IOAPIC_TRIGGER_LEVEL 1
+#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;
struct IOAPICState {
+ SysBusDevice busdev;
uint8_t id;
uint8_t ioregsel;
-
uint32_t irr;
uint64_t ioredtbl[IOAPIC_NUM_PINS];
};
+static IOAPICState *ioapics[MAX_IOAPICS];
+
static void ioapic_service(IOAPICState *s)
{
uint8_t i;
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;
- if (trig_mode == IOAPIC_TRIGGER_EDGE)
+ 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;
- if (delivery_mode == IOAPIC_DM_EXTINT)
+ } else {
+ s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR;
+ }
+ 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);
}
}
}
-void ioapic_set_irq(void *opaque, int vector, int level)
+static void ioapic_set_irq(void *opaque, int vector, int level)
{
IOAPICState *s = opaque;
* to GSI 2. GSI maps to ioapic 1-1. This is not
* the cleanest way of doing it but it should work. */
- 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;
s->irr &= ~mask;
}
} else {
- /* edge triggered */
- if (level) {
+ /* According to the 82093AA manual, we must ignore edge requests
+ * if the input pin is masked. */
+ if (level && !(entry & IOAPIC_LVT_MASKED)) {
s->irr |= mask;
ioapic_service(s);
}
}
}
+void ioapic_eoi_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 & IOAPIC_VECTOR_MASK) == 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;
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;
}
+ }
}
-#ifdef DEBUG_IOAPIC
- printf("I/O APIC read: %08x = %08x\n", s->ioregsel, val);
-#endif
+ 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) {
-#ifdef DEBUG_IOAPIC
- printf("I/O APIC write: %08x = %08x\n", s->ioregsel, val);
-#endif
+ 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;
}
}
-static void ioapic_save(QEMUFile *f, void *opaque)
+static int ioapic_post_load(void *opaque, int version_id)
{
IOAPICState *s = opaque;
- int i;
- qemu_put_8s(f, &s->id);
- qemu_put_8s(f, &s->ioregsel);
- for (i = 0; i < IOAPIC_NUM_PINS; i++) {
- qemu_put_be64s(f, &s->ioredtbl[i]);
+ if (version_id == 1) {
+ /* set sane value */
+ s->irr = 0;
}
+ return 0;
}
-static int ioapic_load(QEMUFile *f, void *opaque, int version_id)
-{
- IOAPICState *s = opaque;
- int i;
-
- if (version_id != 1)
- return -EINVAL;
-
- qemu_get_8s(f, &s->id);
- qemu_get_8s(f, &s->ioregsel);
- for (i = 0; i < IOAPIC_NUM_PINS; i++) {
- qemu_get_be64s(f, &s->ioredtbl[i]);
+static const VMStateDescription vmstate_ioapic = {
+ .name = "ioapic",
+ .version_id = 3,
+ .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_UNUSED_V(2, 8), /* to account for qemu-kvm's v2 format */
+ VMSTATE_UINT32_V(irr, IOAPICState, 2),
+ VMSTATE_UINT64_ARRAY(ioredtbl, IOAPICState, IOAPIC_NUM_PINS),
+ VMSTATE_END_OF_LIST()
}
- return 0;
-}
+};
-static void ioapic_reset(void *opaque)
+static void ioapic_reset(DeviceState *d)
{
- IOAPICState *s = opaque;
+ IOAPICState *s = DO_UPCAST(IOAPICState, busdev.qdev, d);
int i;
- memset(s, 0, sizeof(*s));
- for(i = 0; i < IOAPIC_NUM_PINS; i++)
- s->ioredtbl[i] = 1 << 16; /* mask LVT */
+ s->id = 0;
+ s->ioregsel = 0;
+ s->irr = 0;
+ for (i = 0; i < IOAPIC_NUM_PINS; i++) {
+ s->ioredtbl[i] = 1 << IOAPIC_LVT_MASKED_SHIFT;
+ }
}
static CPUReadMemoryFunc * const ioapic_mem_read[3] = {
ioapic_mem_writel,
};
-qemu_irq *ioapic_init(void)
+static int ioapic_init1(SysBusDevice *dev)
{
- IOAPICState *s;
- qemu_irq *irq;
+ IOAPICState *s = FROM_SYSBUS(IOAPICState, dev);
int io_memory;
+ static int ioapic_no;
- s = qemu_mallocz(sizeof(IOAPICState));
- ioapic_reset(s);
+ if (ioapic_no >= MAX_IOAPICS) {
+ return -1;
+ }
io_memory = cpu_register_io_memory(ioapic_mem_read,
- ioapic_mem_write, s);
- cpu_register_physical_memory(0xfec00000, 0x1000, io_memory);
+ ioapic_mem_write, s,
+ DEVICE_NATIVE_ENDIAN);
+ sysbus_init_mmio(dev, 0x1000, io_memory);
- register_savevm("ioapic", 0, 1, ioapic_save, ioapic_load, s);
- qemu_register_reset(ioapic_reset, s);
- irq = qemu_allocate_irqs(ioapic_set_irq, s, IOAPIC_NUM_PINS);
+ qdev_init_gpio_in(&dev->qdev, ioapic_set_irq, IOAPIC_NUM_PINS);
- return irq;
+ ioapics[ioapic_no++] = s;
+
+ return 0;
+}
+
+static SysBusDeviceInfo ioapic_info = {
+ .init = ioapic_init1,
+ .qdev.name = "ioapic",
+ .qdev.size = sizeof(IOAPICState),
+ .qdev.vmsd = &vmstate_ioapic,
+ .qdev.reset = ioapic_reset,
+ .qdev.no_user = 1,
+};
+
+static void ioapic_register_devices(void)
+{
+ sysbus_register_withprop(&ioapic_info);
}
+
+device_init(ioapic_register_devices)
projects / mirror_qemu.git / blobdiff