#include "isa.h"
#include "monitor.h"
#include "qemu-timer.h"
+#include "i8259_internal.h"
/* debug PIC */
//#define DEBUG_PIC
//#define DEBUG_IRQ_LATENCY
//#define DEBUG_IRQ_COUNT
-typedef struct PicState {
- 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;
- PicState2 *pics_state;
-} PicState;
-
-struct PicState2 {
- /* 0 is master pic, 1 is slave pic */
- /* XXX: better separation between the two pics */
- PicState pics[2];
- qemu_irq parent_irq;
- void *irq_request_opaque;
-};
-
-#if defined(DEBUG_PIC) || defined (DEBUG_IRQ_COUNT)
+#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT)
static int irq_level[16];
#endif
#ifdef DEBUG_IRQ_COUNT
static uint64_t irq_count[16];
#endif
-PicState2 *isa_pic;
-
-/* set irq level. If an edge is detected, then the IRR is set to 1 */
-static inline void pic_set_irq1(PicState *s, int irq, int level)
-{
- int mask;
- mask = 1 << irq;
- if (s->elcr & mask) {
- /* level triggered */
- if (level) {
- s->irr |= mask;
- s->last_irr |= mask;
- } else {
- s->irr &= ~mask;
- s->last_irr &= ~mask;
- }
- } else {
- /* edge triggered */
- if (level) {
- if ((s->last_irr & mask) == 0)
- s->irr |= mask;
- s->last_irr |= mask;
- } else {
- s->last_irr &= ~mask;
- }
- }
-}
+#ifdef DEBUG_IRQ_LATENCY
+static int64_t irq_time[16];
+#endif
+DeviceState *isa_pic;
+static PICCommonState *slave_pic;
/* return the highest priority found in mask (highest = smallest
number). Return 8 if no irq */
-static inline int get_priority(PicState *s, int mask)
+static int get_priority(PICCommonState *s, int mask)
{
int priority;
- if (mask == 0)
+
+ if (mask == 0) {
return 8;
+ }
priority = 0;
- while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0)
+ while ((mask & (1 << ((priority + s->priority_add) & 7))) == 0) {
priority++;
+ }
return priority;
}
/* 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;
mask = s->irr & ~s->imr;
priority = get_priority(s, mask);
- if (priority == 8)
+ if (priority == 8) {
return -1;
+ }
/* compute current priority. If special fully nested mode on the
master, the IRQ coming from the slave is not taken into account
for the priority computation. */
mask = s->isr;
- if (s->special_mask)
+ if (s->special_mask) {
mask &= ~s->imr;
- if (s->special_fully_nested_mode && s == &s->pics_state->pics[0])
+ }
+ if (s->special_fully_nested_mode && s->master) {
mask &= ~(1 << 2);
+ }
cur_priority = get_priority(s, mask);
if (priority < cur_priority) {
/* higher priority found: an irq should be generated */
}
}
-/* raise irq to CPU if necessary. must be called every time the active
- irq may change */
-/* XXX: should not export it, but it is needed for an APIC kludge */
-void pic_update_irq(PicState2 *s)
+/* Update INT output. Must be called every time the output may have changed. */
+static void pic_update_irq(PICCommonState *s)
{
- int irq2, irq;
-
- /* first look at slave pic */
- irq2 = pic_get_irq(&s->pics[1]);
- if (irq2 >= 0) {
- /* if irq request by slave pic, signal master PIC */
- pic_set_irq1(&s->pics[0], 2, 1);
- pic_set_irq1(&s->pics[0], 2, 0);
- }
- /* look at requested irq */
- irq = pic_get_irq(&s->pics[0]);
- if (irq >= 0) {
-#if defined(DEBUG_PIC)
- {
- int i;
- for(i = 0; i < 2; i++) {
- printf("pic%d: imr=%x irr=%x padd=%d\n",
- i, s->pics[i].imr, s->pics[i].irr,
- s->pics[i].priority_add);
+ int irq;
- }
- }
- printf("pic: cpu_interrupt\n");
-#endif
- qemu_irq_raise(s->parent_irq);
- }
-
-/* all targets should do this rather than acking the IRQ in the cpu */
-#if defined(TARGET_MIPS) || defined(TARGET_PPC) || defined(TARGET_ALPHA)
- else {
- qemu_irq_lower(s->parent_irq);
+ irq = pic_get_irq(s);
+ if (irq >= 0) {
+ DPRINTF("pic%d: imr=%x irr=%x padd=%d\n",
+ s->master ? 0 : 1, s->imr, s->irr, s->priority_add);
+ qemu_irq_raise(s->int_out[0]);
+ } else {
+ qemu_irq_lower(s->int_out[0]);
}
-#endif
}
-#ifdef DEBUG_IRQ_LATENCY
-int64_t irq_time[16];
-#endif
-
-static void i8259_set_irq(void *opaque, int irq, int level)
+/* 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)
{
- PicState2 *s = opaque;
+ PICCommonState *s = opaque;
+ int mask = 1 << irq;
+#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT) || \
+ defined(DEBUG_IRQ_LATENCY)
+ int irq_index = s->master ? irq : irq + 8;
+#endif
#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_COUNT)
- if (level != irq_level[irq]) {
- DPRINTF("i8259_set_irq: irq=%d level=%d\n", irq, level);
- irq_level[irq] = level;
+ if (level != irq_level[irq_index]) {
+ DPRINTF("pic_set_irq: irq=%d level=%d\n", irq_index, level);
+ irq_level[irq_index] = level;
#ifdef DEBUG_IRQ_COUNT
- if (level == 1)
- irq_count[irq]++;
+ if (level == 1) {
+ irq_count[irq_index]++;
+ }
#endif
}
#endif
#ifdef DEBUG_IRQ_LATENCY
if (level) {
- irq_time[irq] = qemu_get_clock(vm_clock);
+ irq_time[irq_index] = qemu_get_clock_ns(vm_clock);
}
#endif
- pic_set_irq1(&s->pics[irq >> 3], irq & 7, level);
+
+ if (s->elcr & mask) {
+ /* level triggered */
+ if (level) {
+ s->irr |= mask;
+ s->last_irr |= mask;
+ } else {
+ s->irr &= ~mask;
+ s->last_irr &= ~mask;
+ }
+ } else {
+ /* edge triggered */
+ if (level) {
+ if ((s->last_irr & mask) == 0) {
+ s->irr |= mask;
+ }
+ s->last_irr |= mask;
+ } else {
+ s->last_irr &= ~mask;
+ }
+ }
pic_update_irq(s);
}
/* acknowledge interrupt 'irq' */
-static inline 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)
+ if (s->rotate_on_auto_eoi) {
s->priority_add = (irq + 1) & 7;
+ }
} else {
s->isr |= (1 << irq);
}
/* We don't clear a level sensitive interrupt here */
- if (!(s->elcr & (1 << irq)))
+ if (!(s->elcr & (1 << irq))) {
s->irr &= ~(1 << irq);
+ }
+ pic_update_irq(s);
}
-int pic_read_irq(PicState2 *s)
+int pic_read_irq(DeviceState *d)
{
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, d);
int irq, irq2, intno;
- irq = pic_get_irq(&s->pics[0]);
+ irq = pic_get_irq(s);
if (irq >= 0) {
- pic_intack(&s->pics[0], irq);
if (irq == 2) {
- irq2 = pic_get_irq(&s->pics[1]);
+ irq2 = pic_get_irq(slave_pic);
if (irq2 >= 0) {
- pic_intack(&s->pics[1], irq2);
+ pic_intack(slave_pic, irq2);
} else {
/* spurious IRQ on slave controller */
irq2 = 7;
}
- intno = s->pics[1].irq_base + irq2;
-#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_LATENCY)
- irq = irq2 + 8;
-#endif
+ intno = slave_pic->irq_base + irq2;
} else {
- intno = s->pics[0].irq_base + irq;
+ intno = s->irq_base + irq;
}
+ pic_intack(s, irq);
} else {
/* spurious IRQ on host controller */
irq = 7;
- intno = s->pics[0].irq_base + irq;
+ intno = s->irq_base + irq;
}
- pic_update_irq(s);
+#if defined(DEBUG_PIC) || defined(DEBUG_IRQ_LATENCY)
+ if (irq == 2) {
+ irq = irq2 + 8;
+ }
+#endif
#ifdef DEBUG_IRQ_LATENCY
printf("IRQ%d latency=%0.3fus\n",
irq,
- (double)(qemu_get_clock(vm_clock) -
+ (double)(qemu_get_clock_ns(vm_clock) -
irq_time[irq]) * 1000000.0 / get_ticks_per_sec());
#endif
DPRINTF("pic_interrupt: irq=%d\n", irq);
return intno;
}
-static void pic_reset(void *opaque)
+static void pic_init_reset(PICCommonState *s)
+{
+ pic_reset_common(s);
+ pic_update_irq(s);
+}
+
+static void pic_reset(DeviceState *dev)
{
- PicState *s = opaque;
-
- 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 */
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, dev);
+
+ s->elcr = 0;
+ pic_init_reset(s);
}
-static void pic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+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;
DPRINTF("write: addr=0x%02x val=0x%02x\n", addr, val);
- addr &= 1;
if (addr == 0) {
if (val & 0x10) {
- /* init */
- pic_reset(s);
- /* deassert a pending interrupt */
- qemu_irq_lower(s->pics_state->parent_irq);
+ pic_init_reset(s);
s->init_state = 1;
s->init4 = val & 1;
s->single_mode = val & 2;
- if (val & 0x08)
+ if (val & 0x08) {
hw_error("level sensitive irq not supported");
+ }
} else if (val & 0x08) {
- if (val & 0x04)
+ if (val & 0x04) {
s->poll = 1;
- if (val & 0x02)
+ }
+ if (val & 0x02) {
s->read_reg_select = val & 1;
- if (val & 0x40)
+ }
+ if (val & 0x40) {
s->special_mask = (val >> 5) & 1;
+ }
} else {
cmd = val >> 5;
- switch(cmd) {
+ switch (cmd) {
case 0:
case 4:
s->rotate_on_auto_eoi = cmd >> 2;
if (priority != 8) {
irq = (priority + s->priority_add) & 7;
s->isr &= ~(1 << irq);
- if (cmd == 5)
+ if (cmd == 5) {
s->priority_add = (irq + 1) & 7;
- pic_update_irq(s->pics_state);
+ }
+ pic_update_irq(s);
}
break;
case 3:
irq = val & 7;
s->isr &= ~(1 << irq);
- pic_update_irq(s->pics_state);
+ pic_update_irq(s);
break;
case 6:
s->priority_add = (val + 1) & 7;
- pic_update_irq(s->pics_state);
+ pic_update_irq(s);
break;
case 7:
irq = val & 7;
s->isr &= ~(1 << irq);
s->priority_add = (irq + 1) & 7;
- pic_update_irq(s->pics_state);
+ pic_update_irq(s);
break;
default:
/* no operation */
}
}
} else {
- switch(s->init_state) {
+ switch (s->init_state) {
case 0:
/* normal mode */
s->imr = val;
- pic_update_irq(s->pics_state);
+ pic_update_irq(s);
break;
case 1:
s->irq_base = val & 0xf8;
}
}
-static uint32_t pic_poll_read (PicState *s, uint32_t addr1)
-{
- int ret;
-
- ret = pic_get_irq(s);
- if (ret >= 0) {
- if (addr1 >> 7) {
- s->pics_state->pics[0].isr &= ~(1 << 2);
- s->pics_state->pics[0].irr &= ~(1 << 2);
- }
- s->irr &= ~(1 << ret);
- s->isr &= ~(1 << ret);
- if (addr1 >> 7 || ret != 2)
- pic_update_irq(s->pics_state);
- } else {
- ret = 0x07;
- pic_update_irq(s->pics_state);
- }
-
- return ret;
-}
-
-static uint32_t pic_ioport_read(void *opaque, uint32_t addr1)
+static uint64_t pic_ioport_read(void *opaque, target_phys_addr_t addr,
+ unsigned size)
{
- PicState *s = opaque;
- unsigned int addr;
+ PICCommonState *s = opaque;
int ret;
- addr = addr1;
- addr &= 1;
if (s->poll) {
- ret = pic_poll_read(s, addr1);
+ ret = pic_get_irq(s);
+ if (ret >= 0) {
+ pic_intack(s, ret);
+ ret |= 0x80;
+ } else {
+ ret = 0;
+ }
s->poll = 0;
} else {
if (addr == 0) {
- if (s->read_reg_select)
+ if (s->read_reg_select) {
ret = s->isr;
- else
+ } else {
ret = s->irr;
+ }
} else {
ret = s->imr;
}
}
- DPRINTF("read: addr=0x%02x val=0x%02x\n", addr1, ret);
+ DPRINTF("read: addr=0x%02x val=0x%02x\n", addr, ret);
return ret;
}
-/* memory mapped interrupt status */
-/* XXX: may be the same than pic_read_irq() */
-uint32_t pic_intack_read(PicState2 *s)
+int pic_get_output(DeviceState *d)
{
- int ret;
-
- ret = pic_poll_read(&s->pics[0], 0x00);
- if (ret == 2)
- ret = pic_poll_read(&s->pics[1], 0x80) + 8;
- /* Prepare for ISR read */
- s->pics[0].read_reg_select = 1;
+ PICCommonState *s = DO_UPCAST(PICCommonState, dev.qdev, d);
- return ret;
+ return (pic_get_irq(s) >= 0);
}
-static void elcr_ioport_write(void *opaque, uint32_t addr, uint32_t val)
+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 uint32_t elcr_ioport_read(void *opaque, uint32_t addr1)
+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,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 1,
+ },
};
-/* XXX: add generic master/slave system */
-static void pic_init1(int io_addr, int elcr_addr, PicState *s)
+static const MemoryRegionOps pic_elcr_ioport_ops = {
+ .read = elcr_ioport_read,
+ .write = elcr_ioport_write,
+ .impl = {
+ .min_access_size = 1,
+ .max_access_size = 1,
+ },
+};
+
+static void pic_init(PICCommonState *s)
{
- register_ioport_write(io_addr, 2, 1, pic_ioport_write, s);
- register_ioport_read(io_addr, 2, 1, pic_ioport_read, s);
- if (elcr_addr >= 0) {
- register_ioport_write(elcr_addr, 1, 1, elcr_ioport_write, s);
- register_ioport_read(elcr_addr, 1, 1, elcr_ioport_read, s);
- }
- vmstate_register(NULL, io_addr, &vmstate_pic, s);
- qemu_register_reset(pic_reset, s);
+ 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);
+
+ 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)
+ if (!isa_pic) {
return;
-
- for(i=0;i<2;i++) {
- s = &isa_pic->pics[i];
+ }
+ for (i = 0; i < 2; i++) {
+ 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,
monitor_printf(mon, "IRQ statistics:\n");
for (i = 0; i < 16; i++) {
count = irq_count[i];
- if (count > 0)
+ if (count > 0) {
monitor_printf(mon, "%2d: %" PRId64 "\n", i, count);
+ }
}
#endif
}
-qemu_irq *i8259_init(qemu_irq parent_irq)
+qemu_irq *i8259_init(ISABus *bus, qemu_irq parent_irq)
{
- PicState2 *s;
-
- s = qemu_mallocz(sizeof(PicState2));
- pic_init1(0x20, 0x4d0, &s->pics[0]);
- pic_init1(0xa0, 0x4d1, &s->pics[1]);
- s->pics[0].elcr_mask = 0xf8;
- s->pics[1].elcr_mask = 0xde;
- s->parent_irq = parent_irq;
- s->pics[0].pics_state = s;
- s->pics[1].pics_state = s;
- isa_pic = s;
- return qemu_allocate_irqs(i8259_set_irq, s, 16);
+ qemu_irq *irq_set;
+ ISADevice *dev;
+ int i;
+
+ irq_set = g_malloc(ISA_NUM_IRQS * sizeof(qemu_irq));
+
+ dev = i8259_init_chip("isa-i8259", bus, true);
+
+ qdev_connect_gpio_out(&dev->qdev, 0, parent_irq);
+ for (i = 0 ; i < 8; i++) {
+ irq_set[i] = qdev_get_gpio_in(&dev->qdev, i);
+ }
+
+ isa_pic = &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(PICCommonState, dev, dev);
+
+ return irq_set;
+}
+
+static void i8259_class_init(ObjectClass *klass, void *data)
+{
+ PICCommonClass *k = PIC_COMMON_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ k->init = pic_init;
+ dc->reset = pic_reset;
+}
+
+static TypeInfo i8259_info = {
+ .name = "isa-i8259",
+ .instance_size = sizeof(PICCommonState),
+ .parent = TYPE_PIC_COMMON,
+ .class_init = i8259_class_init,
+};
+
+static void pic_register_types(void)
+{
+ type_register_static(&i8259_info);
}
+
+type_init(pic_register_types)
projects / sdk / emulator / qemu.git / blobdiff