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authorMichael Walle <michael@walle.cc>2011-02-17 23:45:08 +0100
committerEdgar E. Iglesias <edgar.iglesias@gmail.com>2011-03-07 13:42:36 +0100
commit15d7dc4f8086b9d0a09fbcf28ee1654a210351dd (patch)
tree9139b699854bff0ecc58cf989b0bc802fbfd49d6
parent4ef66fa71882a8f8682d9a8d1528e1ec98c264e5 (diff)
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lm32: juart model
This patch adds the JTAG UART model. It is accessed through special control registers and opcodes. Therefore the translation uses callbacks to this model. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
-rw-r--r--Makefile.target1
-rw-r--r--hw/lm32_juart.c150
-rw-r--r--hw/lm32_juart.h11
-rw-r--r--trace-events6
4 files changed, 168 insertions, 0 deletions
diff --git a/Makefile.target b/Makefile.target
index a6e7e5a..c1fcc5b 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -249,6 +249,7 @@ obj-ppc-y += xilinx_ethlite.o
# LM32 peripherals
obj-lm32-y += lm32_pic.o
+obj-lm32-y += lm32_juart.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_juart.c b/hw/lm32_juart.c
new file mode 100644
index 0000000..fddcf7e
--- /dev/null
+++ b/hw/lm32_juart.c
@@ -0,0 +1,150 @@
+/*
+ * LatticeMico32 JTAG UART model.
+ *
+ * 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 "hw.h"
+#include "sysbus.h"
+#include "trace.h"
+#include "qemu-char.h"
+
+#include "lm32_juart.h"
+
+enum {
+ LM32_JUART_MIN_SAVE_VERSION = 0,
+ LM32_JUART_CURRENT_SAVE_VERSION = 0,
+ LM32_JUART_MAX_SAVE_VERSION = 0,
+};
+
+enum {
+ JTX_FULL = (1<<8),
+};
+
+enum {
+ JRX_FULL = (1<<8),
+};
+
+struct LM32JuartState {
+ SysBusDevice busdev;
+ CharDriverState *chr;
+
+ uint32_t jtx;
+ uint32_t jrx;
+};
+typedef struct LM32JuartState LM32JuartState;
+
+uint32_t lm32_juart_get_jtx(DeviceState *d)
+{
+ LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
+
+ trace_lm32_juart_get_jtx(s->jtx);
+ return s->jtx;
+}
+
+uint32_t lm32_juart_get_jrx(DeviceState *d)
+{
+ LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
+
+ trace_lm32_juart_get_jrx(s->jrx);
+ return s->jrx;
+}
+
+void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx)
+{
+ LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
+ unsigned char ch = jtx & 0xff;
+
+ trace_lm32_juart_set_jtx(s->jtx);
+
+ s->jtx = jtx;
+ if (s->chr) {
+ qemu_chr_write(s->chr, &ch, 1);
+ }
+}
+
+void lm32_juart_set_jrx(DeviceState *d, uint32_t jtx)
+{
+ LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
+
+ trace_lm32_juart_set_jrx(s->jrx);
+ s->jrx &= ~JRX_FULL;
+}
+
+static void juart_rx(void *opaque, const uint8_t *buf, int size)
+{
+ LM32JuartState *s = opaque;
+
+ s->jrx = *buf | JRX_FULL;
+}
+
+static int juart_can_rx(void *opaque)
+{
+ LM32JuartState *s = opaque;
+
+ return !(s->jrx & JRX_FULL);
+}
+
+static void juart_event(void *opaque, int event)
+{
+}
+
+static void juart_reset(DeviceState *d)
+{
+ LM32JuartState *s = container_of(d, LM32JuartState, busdev.qdev);
+
+ s->jtx = 0;
+ s->jrx = 0;
+}
+
+static int lm32_juart_init(SysBusDevice *dev)
+{
+ LM32JuartState *s = FROM_SYSBUS(typeof(*s), dev);
+
+ s->chr = qdev_init_chardev(&dev->qdev);
+ if (s->chr) {
+ qemu_chr_add_handlers(s->chr, juart_can_rx, juart_rx, juart_event, s);
+ }
+
+ return 0;
+}
+
+static const VMStateDescription vmstate_lm32_juart = {
+ .name = "lm32-juart",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .minimum_version_id_old = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(jtx, LM32JuartState),
+ VMSTATE_UINT32(jrx, LM32JuartState),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static SysBusDeviceInfo lm32_juart_info = {
+ .init = lm32_juart_init,
+ .qdev.name = "lm32-juart",
+ .qdev.size = sizeof(LM32JuartState),
+ .qdev.vmsd = &vmstate_lm32_juart,
+ .qdev.reset = juart_reset,
+};
+
+static void lm32_juart_register(void)
+{
+ sysbus_register_withprop(&lm32_juart_info);
+}
+
+device_init(lm32_juart_register)
diff --git a/hw/lm32_juart.h b/hw/lm32_juart.h
new file mode 100644
index 0000000..67fc586
--- /dev/null
+++ b/hw/lm32_juart.h
@@ -0,0 +1,11 @@
+#ifndef QEMU_HW_LM32_JUART_H
+#define QEMU_HW_LM32_JUART_H
+
+#include "qemu-common.h"
+
+uint32_t lm32_juart_get_jtx(DeviceState *d);
+uint32_t lm32_juart_get_jrx(DeviceState *d);
+void lm32_juart_set_jtx(DeviceState *d, uint32_t jtx);
+void lm32_juart_set_jrx(DeviceState *d, uint32_t jrx);
+
+#endif /* QEMU_HW_LM32_JUART_H */
diff --git a/trace-events b/trace-events
index 557375e..966099f 100644
--- a/trace-events
+++ b/trace-events
@@ -263,3 +263,9 @@ 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"
+
+# hw/lm32_juart.c
+disable lm32_juart_get_jtx(uint32_t value) "jtx 0x%08x"
+disable lm32_juart_set_jtx(uint32_t value) "jtx 0x%08x"
+disable lm32_juart_get_jrx(uint32_t value) "jrx 0x%08x"
+disable lm32_juart_set_jrx(uint32_t value) "jrx 0x%08x"