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authorRonald G. Minnich <rminnich@gmail.com>2013-03-15 15:57:13 -0700
committerDavid Hendricks <dhendrix@chromium.org>2013-03-16 04:30:16 +0100
commitc2c97231e3f36e9d3f1ee8de2394220ec7beadeb (patch)
treef12ffcaa3a0c06ff2f6a65c76836954048bae05c
parent20ff75f1fc302b83f4184526fbb082718b61501e (diff)
Show the device tree.
This is a bit of a hack but it's very handy. It compiles in your static.c and then shows what coreboot would see when it is run. It uses your static.c and functions pulled from src/device/device_util.c. I've already used it to debug problems with the snow device tree. I'm waiting someone to tell me this is already written :-) Change-Id: Ia8c8a5d08d8757bec49eaf70473efa701bc56581 Signed-off-by: Ronald G. Minnich <rminnich@gmail.com> Reviewed-on: http://review.coreboot.org/2767 Tested-by: build bot (Jenkins) Reviewed-by: David Hendricks <dhendrix@chromium.org>
-rw-r--r--util/showdevicetree/showdt.c169
1 files changed, 169 insertions, 0 deletions
diff --git a/util/showdevicetree/showdt.c b/util/showdevicetree/showdt.c
new file mode 100644
index 0000000000..dc4e4d6fa3
--- /dev/null
+++ b/util/showdevicetree/showdt.c
@@ -0,0 +1,169 @@
+/*
+ * Compile and dump the device tree
+ *
+ * Copyright 2013 Google Inc.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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
+ */
+#include <stdio.h>
+/* you can't include string.h due to conflicts with coreboot prototypes. */
+void *memcpy(void *m1, void *m2, size_t s);
+
+struct device_operations default_dev_ops_root = {
+ .read_resources = NULL,
+ .set_resources = NULL,
+ .enable_resources = NULL,
+ .init = NULL,
+ .scan_bus = NULL,
+ .reset_bus = NULL,
+};
+
+extern struct device dev_root;
+struct device *all_devices = &dev_root;
+
+const char mainboard_name[] = "showdt";
+
+/*
+ * Warning: This function uses a static buffer. Don't call it more than once
+ * from the same print statement!
+ */
+const char *dev_path(device_t dev)
+{
+ static char buffer[DEVICE_PATH_MAX];
+
+ buffer[0] = '\0';
+ if (!dev) {
+ memcpy(buffer, "<null>", 7);
+ } else {
+ switch(dev->path.type) {
+ case DEVICE_PATH_ROOT:
+ memcpy(buffer, "Root Device", 12);
+ break;
+ case DEVICE_PATH_PCI:
+#if CONFIG_PCI_BUS_SEGN_BITS
+ sprintf(buffer, "PCI: %04x:%02x:%02x.%01x",
+ dev->bus->secondary >> 8,
+ dev->bus->secondary & 0xff,
+ PCI_SLOT(dev->path.pci.devfn),
+ PCI_FUNC(dev->path.pci.devfn));
+#else
+ sprintf(buffer, "PCI: %02x:%02x.%01x",
+ dev->bus->secondary,
+ PCI_SLOT(dev->path.pci.devfn),
+ PCI_FUNC(dev->path.pci.devfn));
+#endif
+ break;
+ case DEVICE_PATH_PNP:
+ sprintf(buffer, "PNP: %04x.%01x",
+ dev->path.pnp.port, dev->path.pnp.device);
+ break;
+ case DEVICE_PATH_I2C:
+ sprintf(buffer, "I2C: %02x:%02x",
+ dev->bus->secondary,
+ dev->path.i2c.device);
+ break;
+ case DEVICE_PATH_APIC:
+ sprintf(buffer, "APIC: %02x",
+ dev->path.apic.apic_id);
+ break;
+ case DEVICE_PATH_IOAPIC:
+ sprintf(buffer, "IOAPIC: %02x",
+ dev->path.ioapic.ioapic_id);
+ break;
+ case DEVICE_PATH_DOMAIN:
+ sprintf(buffer, "DOMAIN: %04x",
+ dev->path.domain.domain);
+ break;
+ case DEVICE_PATH_CPU_CLUSTER:
+ sprintf(buffer, "CPU_CLUSTER: %01x",
+ dev->path.cpu_cluster.cluster);
+ break;
+ case DEVICE_PATH_CPU:
+ sprintf(buffer, "CPU: %02x", dev->path.cpu.id);
+ break;
+ case DEVICE_PATH_CPU_BUS:
+ sprintf(buffer, "CPU_BUS: %02x", dev->path.cpu_bus.id);
+ break;
+ default:
+ printf("Unknown device path type: %d\n",
+ dev->path.type);
+ break;
+ }
+ }
+ return buffer;
+}
+
+
+void show_devs_tree(struct device *dev, int debug_level, int depth, int linknum)
+{
+ char depth_str[20] = "";
+ int i;
+ struct device *sibling;
+ struct bus *link;
+
+ for (i = 0; i < depth; i++)
+ depth_str[i] = ' ';
+ depth_str[i] = '\0';
+
+ printf("%s%s: enabled %d%s\n",
+ depth_str, dev_path(dev), dev->enabled,
+ dev->chip_ops ? ":has a chip":"");
+
+ for (link = dev->link_list; link; link = link->next) {
+ for (sibling = link->children; sibling;
+ sibling = sibling->sibling)
+ show_devs_tree(sibling, debug_level, depth + 1, i);
+ }
+}
+
+void show_all_devs_tree(int debug_level, const char *msg)
+{
+ printf("Show all devs in tree form...%s\n", msg);
+
+ show_devs_tree(all_devices, debug_level, 0, -1);
+}
+
+void show_devs_subtree(struct device *root, int debug_level, const char *msg)
+{
+ printf("Show all devs in subtree %s...%s\n",
+ dev_path(root), msg);
+
+ printf("%s\n", msg);
+ show_devs_tree(root, debug_level, 0, -1);
+}
+
+void show_all_devs(int debug_level, const char *msg)
+{
+ struct device *dev;
+
+ printf("Show all devs...%s\n", msg);
+ for (dev = all_devices; dev; dev = dev->next) {
+ printf("%s: enabled %d%s\n",
+ dev_path(dev), dev->enabled,
+ dev->chip_ops ? ":has a chip":"");
+ }
+}
+
+main()
+{
+ show_all_devs(1, "");
+ show_all_devs_tree(1, "");
+}
+
+/*
+ * Example: (yank this and paste into M-x compile in emacs)
+ * or tail -2 showdt.c | head -1 |sh
+ * or whatever.
+ cc -I ../src -I ../src/include -I ../src/arch/armv7/include/ -include build/mainboard/google/snow/static.c showdt.c
+*/