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>
This commit is contained in:
Ronald G. Minnich
David Hendricks
parent
20ff75f1fc
commit
c2c97231e3
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/*
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* Compile and dump the device tree
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*
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* Copyright 2013 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <stdio.h>
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/* you can't include string.h due to conflicts with coreboot prototypes. */
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void *memcpy(void *m1, void *m2, size_t s);
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struct device_operations default_dev_ops_root = {
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.read_resources = NULL,
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.set_resources = NULL,
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.enable_resources = NULL,
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.init = NULL,
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.scan_bus = NULL,
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.reset_bus = NULL,
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};
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extern struct device dev_root;
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struct device *all_devices = &dev_root;
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const char mainboard_name[] = "showdt";
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/*
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* Warning: This function uses a static buffer. Don't call it more than once
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* from the same print statement!
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*/
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const char *dev_path(device_t dev)
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{
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static char buffer[DEVICE_PATH_MAX];
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buffer[0] = '\0';
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if (!dev) {
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memcpy(buffer, "<null>", 7);
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} else {
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switch(dev->path.type) {
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case DEVICE_PATH_ROOT:
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memcpy(buffer, "Root Device", 12);
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break;
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case DEVICE_PATH_PCI:
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#if CONFIG_PCI_BUS_SEGN_BITS
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sprintf(buffer, "PCI: %04x:%02x:%02x.%01x",
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dev->bus->secondary >> 8,
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dev->bus->secondary & 0xff,
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PCI_SLOT(dev->path.pci.devfn),
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PCI_FUNC(dev->path.pci.devfn));
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#else
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sprintf(buffer, "PCI: %02x:%02x.%01x",
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dev->bus->secondary,
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PCI_SLOT(dev->path.pci.devfn),
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PCI_FUNC(dev->path.pci.devfn));
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#endif
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break;
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case DEVICE_PATH_PNP:
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sprintf(buffer, "PNP: %04x.%01x",
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dev->path.pnp.port, dev->path.pnp.device);
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break;
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case DEVICE_PATH_I2C:
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sprintf(buffer, "I2C: %02x:%02x",
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dev->bus->secondary,
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dev->path.i2c.device);
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break;
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case DEVICE_PATH_APIC:
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sprintf(buffer, "APIC: %02x",
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dev->path.apic.apic_id);
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break;
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case DEVICE_PATH_IOAPIC:
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sprintf(buffer, "IOAPIC: %02x",
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dev->path.ioapic.ioapic_id);
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break;
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case DEVICE_PATH_DOMAIN:
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sprintf(buffer, "DOMAIN: %04x",
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dev->path.domain.domain);
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break;
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case DEVICE_PATH_CPU_CLUSTER:
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sprintf(buffer, "CPU_CLUSTER: %01x",
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dev->path.cpu_cluster.cluster);
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break;
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case DEVICE_PATH_CPU:
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sprintf(buffer, "CPU: %02x", dev->path.cpu.id);
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break;
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case DEVICE_PATH_CPU_BUS:
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sprintf(buffer, "CPU_BUS: %02x", dev->path.cpu_bus.id);
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break;
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default:
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printf("Unknown device path type: %d\n",
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dev->path.type);
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break;
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}
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}
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return buffer;
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}
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void show_devs_tree(struct device *dev, int debug_level, int depth, int linknum)
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{
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char depth_str[20] = "";
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int i;
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struct device *sibling;
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struct bus *link;
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for (i = 0; i < depth; i++)
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depth_str[i] = ' ';
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depth_str[i] = '\0';
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printf("%s%s: enabled %d%s\n",
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depth_str, dev_path(dev), dev->enabled,
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dev->chip_ops ? ":has a chip":"");
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for (link = dev->link_list; link; link = link->next) {
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for (sibling = link->children; sibling;
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sibling = sibling->sibling)
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show_devs_tree(sibling, debug_level, depth + 1, i);
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}
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}
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void show_all_devs_tree(int debug_level, const char *msg)
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{
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printf("Show all devs in tree form...%s\n", msg);
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show_devs_tree(all_devices, debug_level, 0, -1);
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}
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void show_devs_subtree(struct device *root, int debug_level, const char *msg)
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{
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printf("Show all devs in subtree %s...%s\n",
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dev_path(root), msg);
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printf("%s\n", msg);
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show_devs_tree(root, debug_level, 0, -1);
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}
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void show_all_devs(int debug_level, const char *msg)
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{
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struct device *dev;
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printf("Show all devs...%s\n", msg);
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for (dev = all_devices; dev; dev = dev->next) {
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printf("%s: enabled %d%s\n",
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dev_path(dev), dev->enabled,
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dev->chip_ops ? ":has a chip":"");
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}
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}
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main()
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{
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show_all_devs(1, "");
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show_all_devs_tree(1, "");
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}
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/*
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* Example: (yank this and paste into M-x compile in emacs)
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* or tail -2 showdt.c | head -1 |sh
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* or whatever.
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cc -I ../src -I ../src/include -I ../src/arch/armv7/include/ -include build/mainboard/google/snow/static.c showdt.c
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*/
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