diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/showdevicetree/showdt.c | 169 |
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 +*/ |