xen-platform-device

xen 3.2.2 源码

Add the xen platform device to the qemu PCI bus.  Useful functionality
will come later.

Index: ioemu/Makefile.target
===================================================================
--- ioemu.orig/Makefile.target	2007-05-10 15:19:05.000000000 +0100
+++ ioemu/Makefile.target	2007-05-10 15:19:28.000000000 +0100
@@ -391,6 +391,7 @@
 VL_OBJS+= usb-uhci.o smbus_eeprom.o
 VL_OBJS+= piix4acpi.o
 VL_OBJS+= xenstore.o
+VL_OBJS+= xen_platform.o
 CPPFLAGS += -DHAS_AUDIO
 endif
 ifeq ($(TARGET_BASE_ARCH), ppc)
Index: ioemu/hw/pc.c
===================================================================
--- ioemu.orig/hw/pc.c	2007-05-10 15:19:11.000000000 +0100
+++ ioemu/hw/pc.c	2007-05-10 15:19:28.000000000 +0100
@@ -676,6 +676,9 @@
     }
 #endif /* !CONFIG_DM */
 
+    if (pci_enabled)
+        pci_xen_platform_init(pci_bus);
+
     for(i = 0; i < MAX_SERIAL_PORTS; i++) {
         if (serial_hds[i]) {
             serial_init(&pic_set_irq_new, isa_pic,
Index: ioemu/hw/xen_platform.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ ioemu/hw/xen_platform.c	2007-05-10 15:19:28.000000000 +0100
@@ -0,0 +1,150 @@
+/*
+ * XEN platform fake pci device, formerly known as the event channel device
+ * 
+ * Copyright (c) 2003-2004 Intel Corp.
+ * Copyright (c) 2006 XenSource
+ * 
+ * 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 "vl.h"
+
+#include <xenguest.h>
+#include <xc_private.h>
+
+extern FILE *logfile;
+
+static void platform_ioport_map(PCIDevice *pci_dev, int region_num,
+                                uint32_t addr, uint32_t size, int type)
+{
+    /* nothing yet */
+}
+
+static uint32_t platform_mmio_read(void *opaque, target_phys_addr_t addr)
+{
+    fprintf(logfile, "Warning: try read from xen platform mmio space\n");
+    return 0;
+}
+
+static void platform_mmio_write(void *opaque, target_phys_addr_t addr,
+			       uint32_t val)
+{
+    fprintf(logfile, "Warning: try write to xen platform mmio space\n");
+    return;
+}
+
+static CPUReadMemoryFunc *platform_mmio_read_funcs[3] = {
+    platform_mmio_read,
+    platform_mmio_read,
+    platform_mmio_read,
+};
+
+static CPUWriteMemoryFunc *platform_mmio_write_funcs[3] = {
+    platform_mmio_write,
+    platform_mmio_write,
+    platform_mmio_write,
+};
+
+static void platform_mmio_map(PCIDevice *d, int region_num,
+                              uint32_t addr, uint32_t size, int type)
+{
+    int mmio_io_addr;
+
+    mmio_io_addr = cpu_register_io_memory(0, platform_mmio_read_funcs,
+                                          platform_mmio_write_funcs, NULL);
+
+    cpu_register_physical_memory(addr, 0x1000000, mmio_io_addr);
+}
+
+struct pci_config_header {
+    uint16_t vendor_id;
+    uint16_t device_id;
+    uint16_t command;
+    uint16_t status;
+    uint8_t  revision;
+    uint8_t  api;
+    uint8_t  subclass;
+    uint8_t  class;
+    uint8_t  cache_line_size; /* Units of 32 bit words */
+    uint8_t  latency_timer; /* In units of bus cycles */
+    uint8_t  header_type; /* Should be 0 */
+    uint8_t  bist; /* Built in self test */
+    uint32_t base_address_regs[6];
+    uint32_t reserved1;
+    uint16_t subsystem_vendor_id;
+    uint16_t subsystem_id;
+    uint32_t rom_addr;
+    uint32_t reserved3;
+    uint32_t reserved4;
+    uint8_t  interrupt_line;
+    uint8_t  interrupt_pin;
+    uint8_t  min_gnt;
+    uint8_t  max_lat;
+};
+
+void xen_pci_save(QEMUFile *f, void *opaque)
+{
+    PCIDevice *d = opaque;
+
+    pci_device_save(d, f);
+}
+
+int xen_pci_load(QEMUFile *f, void *opaque, int version_id)
+{
+    PCIDevice *d = opaque;
+
+    if (version_id != 1)
+        return -EINVAL;
+
+    return pci_device_load(d, f);
+}
+
+void pci_xen_platform_init(PCIBus *bus)
+{
+    PCIDevice *d;
+    struct pci_config_header *pch;
+
+    printf("Register xen platform.\n");
+    d = pci_register_device(bus, "xen-platform", sizeof(PCIDevice), -1, NULL,
+			    NULL);
+    pch = (struct pci_config_header *)d->config;
+    pch->vendor_id = 0x5853;
+    pch->device_id = 0x0001;
+    pch->command = 3; /* IO and memory access */
+    pch->revision = 1;
+    pch->api = 0;
+    pch->subclass = 0x80; /* Other */
+    pch->class = 0xff; /* Unclassified device class */
+    pch->header_type = 0;
+    pch->interrupt_pin = 1;
+
+    /* Microsoft WHQL requires non-zero subsystem IDs. */
+    /* http://www.pcisig.com/reflector/msg02205.html.  */
+    pch->subsystem_vendor_id = pch->vendor_id; /* Duplicate vendor id.  */
+    pch->subsystem_id        = 0x0001;         /* Hardcode sub-id as 1. */
+
+    pci_register_io_region(d, 0, 0x100, PCI_ADDRESS_SPACE_IO,
+                           platform_ioport_map);
+
+    /* reserve 16MB mmio address for share memory*/
+    pci_register_io_region(d, 1, 0x1000000, PCI_ADDRESS_SPACE_MEM_PREFETCH,
+			   platform_mmio_map);
+
+    register_savevm("platform", 0, 1, xen_pci_save, xen_pci_load, d);
+    printf("Done register platform.\n");
+}
Index: ioemu/vl.h
===================================================================
--- ioemu.orig/vl.h	2007-05-10 15:19:11.000000000 +0100
+++ ioemu/vl.h	2007-05-10 15:19:28.000000000 +0100
@@ -1437,6 +1437,10 @@
 extern long time_offset;
 void timeoffset_get(void);
 
+/* xen_platform.c */
+void pci_xen_platform_init(PCIBus *bus);
+
+
 void kqemu_record_dump(void);
 
 extern char domain_name[];