Add qemu 2.4.0

[kvmfornfv.git] / qemu / roms / ipxe / src / drivers / linux / linux.c

diff --git a/qemu/roms/ipxe/src/drivers/linux/linux.c b/qemu/roms/ipxe/src/drivers/linux/linux.c
new file mode 100644 (file)
index 0000000..83546b2
--- /dev/null
+++ b/qemu/roms/ipxe/src/drivers/linux/linux.c
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2010 Piotr Jaroszyński <p.jaroszynski@gmail.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+FILE_LICENCE(GPL2_OR_LATER);
+
+/** @file
+ *
+ * Linux root_device and root_driver.
+ */
+
+#include <errno.h>
+#include <string.h>
+#include <stdio.h>
+#include <ipxe/linux.h>
+#include <ipxe/malloc.h>
+#include <ipxe/settings.h>
+
+LIST_HEAD(linux_device_requests);
+LIST_HEAD(linux_global_settings);
+
+/** Go over the device requests looking for a matching linux driver to handle them. */
+static int linux_probe(struct root_device *rootdev)
+{
+       struct linux_device_request *request;
+       struct linux_driver *driver;
+       struct linux_device *device = NULL;
+       int rc;
+
+       /* Apply global settings */
+       linux_apply_settings(&linux_global_settings, NULL);
+
+       list_for_each_entry(request, &linux_device_requests, list) {
+               if (! device)
+                       device = zalloc(sizeof(*device));
+
+               if (! device)
+                       return -ENOMEM;
+
+               rc = 1;
+
+               for_each_table_entry(driver, LINUX_DRIVERS) {
+                       if ((rc = strcmp(driver->name, request->driver)) == 0)
+                               break;
+               }
+
+               if (rc != 0) {
+                       printf("Linux driver '%s' not found\n", request->driver);
+                       continue;
+               }
+
+               if (! driver->can_probe) {
+                       printf("Driver '%s' cannot handle any more devices\n", driver->name);
+                       continue;
+               }
+
+               /* We found a matching driver so add the device to the hierarchy */
+               list_add(&device->dev.siblings, &rootdev->dev.children);
+               device->dev.parent = &rootdev->dev;
+               INIT_LIST_HEAD(&device->dev.children);
+
+               if (driver->probe(device, request) == 0) {
+                       device->driver = driver;
+                       device->dev.driver_name = driver->name;
+                       /* Driver handled the device so release ownership */
+                       device = NULL;
+               } else {
+                       /* Driver failed to handle the device so remove it from the hierarchy
+                        * and reuse the object */
+                       list_del(&device->dev.siblings);
+               }
+       };
+
+       free(device);
+
+       return 0;
+}
+
+/** Remove all the linux devices registered in probe() */
+static void linux_remove(struct root_device *rootdev)
+{
+       struct linux_device *device;
+       struct linux_device *tmp;
+
+       list_for_each_entry_safe(device, tmp, &rootdev->dev.children, dev.siblings) {
+               list_del(&device->dev.siblings);
+               device->driver->remove(device);
+               free(device);
+       }
+}
+
+/** Linux root driver */
+static struct root_driver linux_root_driver = {
+       .probe = linux_probe,
+       .remove = linux_remove,
+};
+
+/** Linux root device */
+struct root_device linux_root_device __root_device = {
+       .dev = { .name = "linux" },
+       .driver = &linux_root_driver,
+};
+
+struct linux_setting *linux_find_setting(char *name, struct list_head *settings)
+{
+       struct linux_setting *setting;
+       struct linux_setting *result = NULL;
+
+       /* Find the last occurrence of a setting with the specified name */
+       list_for_each_entry(setting, settings, list) {
+               if (strcmp(setting->name, name) == 0) {
+                       result = setting;
+               }
+       }
+
+       return result;
+}
+
+void linux_apply_settings(struct list_head *new_settings, struct settings *settings_block)
+{
+       struct linux_setting *setting;
+       int rc;
+
+       list_for_each_entry(setting, new_settings, list) {
+               /* Skip already applied settings */
+               if (setting->applied)
+                       continue;
+
+               struct setting *s = find_setting(setting->name);
+               if (s) {
+                       rc = storef_setting(settings_block, find_setting(setting->name), setting->value);
+                       if (rc != 0)
+                               DBG("linux storing setting '%s' = '%s' failed\n", setting->name, setting->value);
+                       setting->applied = 1;
+               } else {
+                       DBG("linux unknown setting '%s'\n", setting->name);
+               }
+       }
+}