aboutsummaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Makefile.target1
-rw-r--r--hw/lm32_pic.c190
-rw-r--r--hw/lm32_pic.h11
-rw-r--r--trace-events9
4 files changed, 211 insertions, 0 deletions
diff --git a/Makefile.target b/Makefile.target
index 857976aa57..a6e7e5affe 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -248,6 +248,7 @@ obj-ppc-y += xilinx_uartlite.o
obj-ppc-y += xilinx_ethlite.o
# LM32 peripherals
+obj-lm32-y += lm32_pic.o
obj-mips-y = mips_r4k.o mips_jazz.o mips_malta.o mips_mipssim.o
obj-mips-y += mips_addr.o mips_timer.o mips_int.o
diff --git a/hw/lm32_pic.c b/hw/lm32_pic.c
new file mode 100644
index 0000000000..02941a7d0d
--- /dev/null
+++ b/hw/lm32_pic.c
@@ -0,0 +1,190 @@
+/*
+ * LatticeMico32 CPU interrupt controller logic.
+ *
+ * Copyright (c) 2010 Michael Walle <michael@walle.cc>
+ *
+ * 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/>.
+ */
+
+#include <assert.h>
+
+#include "hw.h"
+#include "pc.h"
+#include "monitor.h"
+#include "sysbus.h"
+#include "trace.h"
+#include "lm32_pic.h"
+
+struct LM32PicState {
+ SysBusDevice busdev;
+ qemu_irq parent_irq;
+ uint32_t im; /* interrupt mask */
+ uint32_t ip; /* interrupt pending */
+ uint32_t irq_state;
+
+ /* statistics */
+ uint32_t stats_irq_count[32];
+};
+typedef struct LM32PicState LM32PicState;
+
+static LM32PicState *pic;
+void pic_info(Monitor *mon)
+{
+ if (pic == NULL) {
+ return;
+ }
+
+ monitor_printf(mon, "lm32-pic: im=%08x ip=%08x irq_state=%08x\n",
+ pic->im, pic->ip, pic->irq_state);
+}
+
+void irq_info(Monitor *mon)
+{
+ int i;
+ uint32_t count;
+
+ if (pic == NULL) {
+ return;
+ }
+
+ monitor_printf(mon, "IRQ statistics:\n");
+ for (i = 0; i < 32; i++) {
+ count = pic->stats_irq_count[i];
+ if (count > 0) {
+ monitor_printf(mon, "%2d: %u\n", i, count);
+ }
+ }
+}
+
+static void update_irq(LM32PicState *s)
+{
+ s->ip |= s->irq_state;
+
+ if (s->ip & s->im) {
+ trace_lm32_pic_raise_irq();
+ qemu_irq_raise(s->parent_irq);
+ } else {
+ trace_lm32_pic_lower_irq();
+ qemu_irq_lower(s->parent_irq);
+ }
+}
+
+static void irq_handler(void *opaque, int irq, int level)
+{
+ LM32PicState *s = opaque;
+
+ assert(irq < 32);
+ trace_lm32_pic_interrupt(irq, level);
+
+ if (level) {
+ s->irq_state |= (1 << irq);
+ s->stats_irq_count[irq]++;
+ } else {
+ s->irq_state &= ~(1 << irq);
+ }
+
+ update_irq(s);
+}
+
+void lm32_pic_set_im(DeviceState *d, uint32_t im)
+{
+ LM32PicState *s = container_of(d, LM32PicState, busdev.qdev);
+
+ trace_lm32_pic_set_im(im);
+ s->im = im;
+
+ update_irq(s);
+}
+
+void lm32_pic_set_ip(DeviceState *d, uint32_t ip)
+{
+ LM32PicState *s = container_of(d, LM32PicState, busdev.qdev);
+
+ trace_lm32_pic_set_ip(ip);
+
+ /* ack interrupt */
+ s->ip &= ~ip;
+
+ update_irq(s);
+}
+
+uint32_t lm32_pic_get_im(DeviceState *d)
+{
+ LM32PicState *s = container_of(d, LM32PicState, busdev.qdev);
+
+ trace_lm32_pic_get_im(s->im);
+ return s->im;
+}
+
+uint32_t lm32_pic_get_ip(DeviceState *d)
+{
+ LM32PicState *s = container_of(d, LM32PicState, busdev.qdev);
+
+ trace_lm32_pic_get_ip(s->ip);
+ return s->ip;
+}
+
+static void pic_reset(DeviceState *d)
+{
+ LM32PicState *s = container_of(d, LM32PicState, busdev.qdev);
+ int i;
+
+ s->im = 0;
+ s->ip = 0;
+ s->irq_state = 0;
+ for (i = 0; i < 32; i++) {
+ s->stats_irq_count[i] = 0;
+ }
+}
+
+static int lm32_pic_init(SysBusDevice *dev)
+{
+ LM32PicState *s = FROM_SYSBUS(typeof(*s), dev);
+
+ qdev_init_gpio_in(&dev->qdev, irq_handler, 32);
+ sysbus_init_irq(dev, &s->parent_irq);
+
+ pic = s;
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_lm32_pic = {
+ .name = "lm32-pic",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(im, LM32PicState),
+ VMSTATE_UINT32(ip, LM32PicState),
+ VMSTATE_UINT32(irq_state, LM32PicState),
+ VMSTATE_UINT32_ARRAY(stats_irq_count, LM32PicState, 32),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static SysBusDeviceInfo lm32_pic_info = {
+ .init = lm32_pic_init,
+ .qdev.name = "lm32-pic",
+ .qdev.size = sizeof(LM32PicState),
+ .qdev.vmsd = &vmstate_lm32_pic,
+ .qdev.reset = pic_reset,
+};
+
+static void lm32_pic_register(void)
+{
+ sysbus_register_withprop(&lm32_pic_info);
+}
+
+device_init(lm32_pic_register)
diff --git a/hw/lm32_pic.h b/hw/lm32_pic.h
new file mode 100644
index 0000000000..e6479b8f63
--- /dev/null
+++ b/hw/lm32_pic.h
@@ -0,0 +1,11 @@
+#ifndef QEMU_HW_LM32_PIC_H
+#define QEMU_HW_LM32_PIC_H
+
+#include "qemu-common.h"
+
+uint32_t lm32_pic_get_ip(DeviceState *d);
+uint32_t lm32_pic_get_im(DeviceState *d);
+void lm32_pic_set_ip(DeviceState *d, uint32_t ip);
+void lm32_pic_set_im(DeviceState *d, uint32_t im);
+
+#endif /* QEMU_HW_LM32_PIC_H */
diff --git a/trace-events b/trace-events
index e6138ea460..557375e4e6 100644
--- a/trace-events
+++ b/trace-events
@@ -254,3 +254,12 @@ disable spice_vmc_write(ssize_t out, int len) "spice wrottn %lu of requested %zd
disable spice_vmc_read(int bytes, int len) "spice read %lu of requested %zd"
disable spice_vmc_register_interface(void *scd) "spice vmc registered interface %p"
disable spice_vmc_unregister_interface(void *scd) "spice vmc unregistered interface %p"
+
+# hw/lm32_pic.c
+disable lm32_pic_raise_irq(void) "Raise CPU interrupt"
+disable lm32_pic_lower_irq(void) "Lower CPU interrupt"
+disable lm32_pic_interrupt(int irq, int level) "Set IRQ%d %d"
+disable lm32_pic_set_im(uint32_t im) "im 0x%08x"
+disable lm32_pic_set_ip(uint32_t ip) "ip 0x%08x"
+disable lm32_pic_get_im(uint32_t im) "im 0x%08x"
+disable lm32_pic_get_ip(uint32_t ip) "ip 0x%08x"
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-22 11:48:28 +0000