124 lines
3.3 KiB
C
124 lines
3.3 KiB
C
/*
|
|
* QEMU IRQ/GPIO common code.
|
|
*
|
|
* Copyright (c) 2007 CodeSourcery.
|
|
*
|
|
* 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-common.h"
|
|
#include "irq.h"
|
|
|
|
struct IRQState {
|
|
qemu_irq_handler handler;
|
|
void *opaque;
|
|
int n;
|
|
};
|
|
|
|
void qemu_set_irq(qemu_irq irq, int level)
|
|
{
|
|
if (!irq)
|
|
return;
|
|
|
|
irq->handler(irq->opaque, irq->n, level);
|
|
}
|
|
|
|
qemu_irq *qemu_allocate_irqs(qemu_irq_handler handler, void *opaque, int n)
|
|
{
|
|
qemu_irq *s;
|
|
struct IRQState *p;
|
|
int i;
|
|
|
|
s = (qemu_irq *)g_malloc0(sizeof(qemu_irq) * n);
|
|
p = (struct IRQState *)g_malloc0(sizeof(struct IRQState) * n);
|
|
for (i = 0; i < n; i++) {
|
|
p->handler = handler;
|
|
p->opaque = opaque;
|
|
p->n = i;
|
|
s[i] = p;
|
|
p++;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void qemu_free_irqs(qemu_irq *s)
|
|
{
|
|
g_free(s[0]);
|
|
g_free(s);
|
|
}
|
|
|
|
static void qemu_notirq(void *opaque, int line, int level)
|
|
{
|
|
struct IRQState *irq = opaque;
|
|
|
|
irq->handler(irq->opaque, irq->n, !level);
|
|
}
|
|
|
|
qemu_irq qemu_irq_invert(qemu_irq irq)
|
|
{
|
|
/* The default state for IRQs is low, so raise the output now. */
|
|
qemu_irq_raise(irq);
|
|
return qemu_allocate_irqs(qemu_notirq, irq, 1)[0];
|
|
}
|
|
|
|
static void qemu_splitirq(void *opaque, int line, int level)
|
|
{
|
|
struct IRQState **irq = opaque;
|
|
irq[0]->handler(irq[0]->opaque, irq[0]->n, level);
|
|
irq[1]->handler(irq[1]->opaque, irq[1]->n, level);
|
|
}
|
|
|
|
qemu_irq qemu_irq_split(qemu_irq irq1, qemu_irq irq2)
|
|
{
|
|
qemu_irq *s = g_malloc0(2 * sizeof(qemu_irq));
|
|
s[0] = irq1;
|
|
s[1] = irq2;
|
|
return qemu_allocate_irqs(qemu_splitirq, s, 1)[0];
|
|
}
|
|
|
|
static void proxy_irq_handler(void *opaque, int n, int level)
|
|
{
|
|
qemu_irq **target = opaque;
|
|
|
|
if (*target) {
|
|
qemu_set_irq((*target)[n], level);
|
|
}
|
|
}
|
|
|
|
qemu_irq *qemu_irq_proxy(qemu_irq **target, int n)
|
|
{
|
|
return qemu_allocate_irqs(proxy_irq_handler, target, n);
|
|
}
|
|
|
|
void qemu_irq_intercept_in(qemu_irq *gpio_in, qemu_irq_handler handler, int n)
|
|
{
|
|
int i;
|
|
qemu_irq *old_irqs = qemu_allocate_irqs(NULL, NULL, n);
|
|
for (i = 0; i < n; i++) {
|
|
*old_irqs[i] = *gpio_in[i];
|
|
gpio_in[i]->handler = handler;
|
|
gpio_in[i]->opaque = old_irqs;
|
|
}
|
|
}
|
|
|
|
void qemu_irq_intercept_out(qemu_irq **gpio_out, qemu_irq_handler handler, int n)
|
|
{
|
|
qemu_irq *old_irqs = *gpio_out;
|
|
*gpio_out = qemu_allocate_irqs(handler, old_irqs, n);
|
|
}
|