[Qemu-devel] [RFC 05/23] prep: Add i82374 DMA emulation

["Andreas Färber" <andreas.faerber@web.de>]

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>

Confine to CONFIG_I82374.

Signed-off-by: Andreas Färber <andreas.faerber@web.de>
---
 Makefile.objs                   |    1 +
 default-configs/ppc-softmmu.mak |    1 +
 hw/i82374.c                     |  133 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 135 insertions(+), 0 deletions(-)
 create mode 100644 hw/i82374.c

diff --git a/Makefile.objs b/Makefile.objs
index 509ab39..b0e4c09 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -201,6 +201,7 @@ hw-obj-$(CONFIG_FDC) += fdc.o
 hw-obj-$(CONFIG_ACPI) += acpi.o acpi_piix4.o
 hw-obj-$(CONFIG_APM) += pm_smbus.o apm.o
 hw-obj-$(CONFIG_DMA) += dma.o
+hw-obj-$(CONFIG_I82374) += i82374.o
 hw-obj-$(CONFIG_HPET) += hpet.o
 hw-obj-$(CONFIG_APPLESMC) += applesmc.o
 hw-obj-$(CONFIG_SMARTCARD) += usb-ccid.o ccid-card-passthru.o
diff --git a/default-configs/ppc-softmmu.mak b/default-configs/ppc-softmmu.mak
index 4563742..1d1a7c2 100644
--- a/default-configs/ppc-softmmu.mak
+++ b/default-configs/ppc-softmmu.mak
@@ -11,6 +11,7 @@ CONFIG_I8254=y
 CONFIG_PCKBD=y
 CONFIG_FDC=y
 CONFIG_DMA=y
+CONFIG_I82374=y
 CONFIG_OPENPIC=y
 CONFIG_PREP_PCI=y
 CONFIG_MACIO=y
diff --git a/hw/i82374.c b/hw/i82374.c
new file mode 100644
index 0000000..383cf1b
--- /dev/null
+++ b/hw/i82374.c
@@ -0,0 +1,133 @@
+/*
+ * QEMU Intel 82374 emulation (Enhanced DMA controller)
+ *
+ * Copyright (c) 2010 Herve Poussineau
+ *
+ * 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 "isa.h"
+
+//#define DEBUG_I82374
+
+#ifdef DEBUG_I82374
+#define DPRINTF(fmt, ...) \
+do { fprintf(stderr, "i82374: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+do {} while (0)
+#endif
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "i82374 ERROR: " fmt , ## __VA_ARGS__); } while (0)
+
+typedef struct I82374State {
+    uint8_t commands[8];
+} I82374State;
+
+static uint32_t i82374_read_isr(void *opaque, uint32_t nport)
+{
+    uint32_t val = 0;
+
+    BADF("%s: %08x\n", __func__, nport);
+
+    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
+    return val;
+}
+
+static void i82374_write_command(void *opaque, uint32_t nport, uint32_t data)
+{
+    DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
+
+    if (data != 0x42) {
+        /* Not Stop S/G command */
+        BADF("%s: %08x=%08x\n", __func__, nport, data);
+    }
+}
+
+static uint32_t i82374_read_status(void *opaque, uint32_t nport)
+{
+    uint32_t val = 0;
+
+    BADF("%s: %08x\n", __func__, nport);
+
+    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
+    return val;
+}
+
+static void i82374_write_descriptor(void *opaque, uint32_t nport, uint32_t data)
+{
+    DPRINTF("%s: %08x=%08x\n", __func__, nport, data);
+
+    BADF("%s: %08x=%08x\n", __func__, nport, data);
+}
+
+static uint32_t i82374_read_descriptor(void *opaque, uint32_t nport)
+{
+    uint32_t val = 0;
+
+    BADF("%s: %08x\n", __func__, nport);
+
+    DPRINTF("%s: %08x=%08x\n", __func__, nport, val);
+    return val;
+}
+
+static void i82374_init(I82374State *s)
+{
+    DMA_init(1, NULL);
+    memset(s->commands, 0, sizeof(s->commands));
+}
+
+typedef struct ISAi82374State {
+    ISADevice dev;
+    uint32_t iobase;
+    I82374State state;
+} ISAi82374State;
+
+static int i82374_isa_init(ISADevice *dev)
+{
+    ISAi82374State *isa = DO_UPCAST(ISAi82374State, dev, dev);
+    I82374State *s = &isa->state;
+
+    register_ioport_read(isa->iobase + 0x0A, 1, 1, i82374_read_isr, s);
+    register_ioport_write(isa->iobase + 0x10, 8, 1, i82374_write_command, s);
+    register_ioport_read(isa->iobase + 0x18, 8, 1, i82374_read_status, s);
+    register_ioport_write(isa->iobase + 0x20, 0x20, 1, i82374_write_descriptor, s);
+    register_ioport_read(isa->iobase + 0x20, 0x20, 1, i82374_read_descriptor, s);
+
+    i82374_init(s);
+
+    return 0;
+}
+
+static ISADeviceInfo i82374_isa_info = {
+    .qdev.name  = "i82374",
+    .qdev.size  = sizeof(ISAi82374State),
+    .init       = i82374_isa_init,
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_HEX32("iobase", ISAi82374State, iobase, 0x400),
+        DEFINE_PROP_END_OF_LIST()
+    },
+};
+
+static void i82374_register_devices(void)
+{
+    isa_qdev_register(&i82374_isa_info);
+}
+
+device_init(i82374_register_devices)
-- 
1.7.5.3