cregit-Linux how code gets into the kernel

Release 4.15 scripts/dtc/livetree.c

Directory: scripts/dtc
/*
 * (C) Copyright David Gibson <dwg@au1.ibm.com>, IBM Corporation.  2005.
 *
 *
 * 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 (at your option) 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *                                                                   USA
 */

#include "dtc.h"

/*
 * Tree building functions
 */


void add_label(struct label **labels, char *label) { struct label *new; /* Make sure the label isn't already there */ for_each_label_withdel(*labels, new) if (streq(new->label, label)) { new->deleted = 0; return; } new = xmalloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->label = label; new->next = *labels; *labels = new; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio6775.28%150.00%
Stephen Warren2224.72%150.00%
Total89100.00%2100.00%


void delete_labels(struct label **labels) { struct label *label; for_each_label(*labels, label) label->deleted = 1; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren28100.00%1100.00%
Total28100.00%1100.00%


struct property *build_property(char *name, struct data val) { struct property *new = xmalloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->name = name; new->val = val; return new; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4477.19%150.00%
John Bonesio1322.81%150.00%
Total57100.00%2100.00%


struct property *build_property_delete(char *name) { struct property *new = xmalloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->name = name; new->deleted = 1; return new; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren53100.00%1100.00%
Total53100.00%1100.00%


struct property *chain_property(struct property *first, struct property *list) { assert(first->next == NULL); first->next = list; return first; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson35100.00%1100.00%
Total35100.00%1100.00%


struct property *reverse_properties(struct property *first) { struct property *p = first; struct property *head = NULL; struct property *next; while (p) { next = p->next; p->next = head; head = p; p = next; } return head; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson60100.00%1100.00%
Total60100.00%1100.00%


struct node *build_node(struct property *proplist, struct node *children) { struct node *new = xmalloc(sizeof(*new)); struct node *child; memset(new, 0, sizeof(*new)); new->proplist = reverse_properties(proplist); new->children = children; for_each_child(new, child) { child->parent = new; } return new; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson81100.00%1100.00%
Total81100.00%1100.00%


struct node *build_node_delete(void) { struct node *new = xmalloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->deleted = 1; return new; }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren45100.00%1100.00%
Total45100.00%1100.00%


struct node *name_node(struct node *node, char *name) { assert(node->name == NULL); node->name = name; return node; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson34100.00%1100.00%
Total34100.00%1100.00%


struct node *merge_nodes(struct node *old_node, struct node *new_node) { struct property *new_prop, *old_prop; struct node *new_child, *old_child; struct label *l; old_node->deleted = 0; /* Add new node labels to old node */ for_each_label_withdel(new_node->labels, l) add_label(&old_node->labels, l->label); /* Move properties from the new node to the old node. If there * is a collision, replace the old value with the new */ while (new_node->proplist) { /* Pop the property off the list */ new_prop = new_node->proplist; new_node->proplist = new_prop->next; new_prop->next = NULL; if (new_prop->deleted) { delete_property_by_name(old_node, new_prop->name); free(new_prop); continue; } /* Look for a collision, set new value if there is */ for_each_property_withdel(old_node, old_prop) { if (streq(old_prop->name, new_prop->name)) { /* Add new labels to old property */ for_each_label_withdel(new_prop->labels, l) add_label(&old_prop->labels, l->label); old_prop->val = new_prop->val; old_prop->deleted = 0; free(new_prop); new_prop = NULL; break; } } /* if no collision occurred, add property to the old node. */ if (new_prop) add_property(old_node, new_prop); } /* Move the override child nodes into the primary node. If * there is a collision, then merge the nodes. */ while (new_node->children) { /* Pop the child node off the list */ new_child = new_node->children; new_node->children = new_child->next_sibling; new_child->parent = NULL; new_child->next_sibling = NULL; if (new_child->deleted) { delete_node_by_name(old_node, new_child->name); free(new_child); continue; } /* Search for a collision. Merge if there is */ for_each_child_withdel(old_node, old_child) { if (streq(old_child->name, new_child->name)) { merge_nodes(old_child, new_child); new_child = NULL; break; } } /* if no collision occurred, add child to the old node. */ if (new_child) add_child(old_node, new_child); } /* The new node contents are now merged into the old node. Free * the new node. */ free(new_node); return old_node; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio20967.20%120.00%
Stephen Warren6219.94%120.00%
David Gibson3912.54%240.00%
Rob Herring10.32%120.00%
Total311100.00%5100.00%


void add_orphan_node(struct node *dt, struct node *new_node, char *ref) { static unsigned int next_orphan_fragment = 0; struct node *node; struct property *p; struct data d = empty_data; char *name; d = data_add_marker(d, REF_PHANDLE, ref); d = data_append_integer(d, 0xffffffff, 32); p = build_property("target", d); xasprintf(&name, "fragment@%u", next_orphan_fragment++); name_node(new_node, "__overlay__"); node = build_node(p, new_node); name_node(node, name); add_child(dt, node); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Herring118100.00%1100.00%
Total118100.00%1100.00%


struct node *chain_node(struct node *first, struct node *list) { assert(first->next_sibling == NULL); first->next_sibling = list; return first; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio35100.00%1100.00%
Total35100.00%1100.00%


void add_property(struct node *node, struct property *prop) { struct property **p; prop->next = NULL; p = &node->proplist; while (*p) p = &((*p)->next); *p = prop; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio56100.00%1100.00%
Total56100.00%1100.00%


void delete_property_by_name(struct node *node, char *name) { struct property *prop = node->proplist; while (prop) { if (streq(prop->name, name)) { delete_property(prop); return; } prop = prop->next; } }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren5398.15%150.00%
Rob Herring11.85%150.00%
Total54100.00%2100.00%


void delete_property(struct property *prop) { prop->deleted = 1; delete_labels(&prop->labels); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren24100.00%1100.00%
Total24100.00%1100.00%


void add_child(struct node *parent, struct node *child) { struct node **p; child->next_sibling = NULL; child->parent = parent; p = &parent->children; while (*p) p = &((*p)->next_sibling); *p = child; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio3861.29%150.00%
David Gibson2438.71%150.00%
Total62100.00%2100.00%


void delete_node_by_name(struct node *parent, char *name) { struct node *node = parent->children; while (node) { if (streq(node->name, name)) { delete_node(node); return; } node = node->next_sibling; } }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren5398.15%150.00%
Rob Herring11.85%150.00%
Total54100.00%2100.00%


void delete_node(struct node *node) { struct property *prop; struct node *child; node->deleted = 1; for_each_child(node, child) delete_node(child); for_each_property(node, prop) delete_property(prop); delete_labels(&node->labels); }

Contributors

PersonTokensPropCommitsCommitProp
Stephen Warren56100.00%1100.00%
Total56100.00%1100.00%


void append_to_property(struct node *node, char *name, const void *data, int len) { struct data d; struct property *p; p = get_property(node, name); if (p) { d = data_append_data(p->val, data, len); p->val = d; } else { d = data_append_data(empty_data, data, len); p = build_property(name, d); add_property(node, p); } }

Contributors

PersonTokensPropCommitsCommitProp
Rob Herring95100.00%1100.00%
Total95100.00%1100.00%


struct reserve_info *build_reserve_entry(uint64_t address, uint64_t size) { struct reserve_info *new = xmalloc(sizeof(*new)); memset(new, 0, sizeof(*new)); new->address = address; new->size = size; return new; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4276.36%266.67%
John Bonesio1323.64%133.33%
Total55100.00%3100.00%


struct reserve_info *chain_reserve_entry(struct reserve_info *first, struct reserve_info *list) { assert(first->next == NULL); first->next = list; return first; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson35100.00%1100.00%
Total35100.00%1100.00%


struct reserve_info *add_reserve_entry(struct reserve_info *list, struct reserve_info *new) { struct reserve_info *last; new->next = NULL; if (! list) return new; for (last = list; last->next; last = last->next) ; last->next = new; return list; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson62100.00%1100.00%
Total62100.00%1100.00%


struct dt_info *build_dt_info(unsigned int dtsflags, struct reserve_info *reservelist, struct node *tree, uint32_t boot_cpuid_phys) { struct dt_info *dti; dti = xmalloc(sizeof(*dti)); dti->dtsflags = dtsflags; dti->reservelist = reservelist; dti->dt = tree; dti->boot_cpuid_phys = boot_cpuid_phys; return dti; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4770.15%266.67%
Rob Herring2029.85%133.33%
Total67100.00%3100.00%

/* * Tree accessor functions */
const char *get_unitname(struct node *node) { if (node->name[node->basenamelen] == '\0') return ""; else return node->name + node->basenamelen + 1; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson40100.00%1100.00%
Total40100.00%1100.00%


struct property *get_property(struct node *node, const char *propname) { struct property *prop; for_each_property(node, prop) if (streq(prop->name, propname)) return prop; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson45100.00%1100.00%
Total45100.00%1100.00%


cell_t propval_cell(struct property *prop) { assert(prop->val.len == sizeof(cell_t)); return fdt32_to_cpu(*((fdt32_t *)prop->val.val)); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4097.56%266.67%
Rob Herring12.44%133.33%
Total41100.00%3100.00%


cell_t propval_cell_n(struct property *prop, int n) { assert(prop->val.len / sizeof(cell_t) >= n); return fdt32_to_cpu(*((fdt32_t *)prop->val.val + n)); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Herring48100.00%1100.00%
Total48100.00%1100.00%


struct property *get_property_by_label(struct node *tree, const char *label, struct node **node) { struct property *prop; struct node *c; *node = tree; for_each_property(tree, prop) { struct label *l; for_each_label(prop->labels, l) if (streq(l->label, label)) return prop; } for_each_child(tree, c) { prop = get_property_by_label(c, label, node); if (prop) return prop; } *node = NULL; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio105100.00%1100.00%
Total105100.00%1100.00%


struct marker *get_marker_label(struct node *tree, const char *label, struct node **node, struct property **prop) { struct marker *m; struct property *p; struct node *c; *node = tree; for_each_property(tree, p) { *prop = p; m = p->val.markers; for_each_marker_of_type(m, LABEL) if (streq(m->ref, label)) return m; } for_each_child(tree, c) { m = get_marker_label(c, label, node, prop); if (m) return m; } *prop = NULL; *node = NULL; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio131100.00%1100.00%
Total131100.00%1100.00%


struct node *get_subnode(struct node *node, const char *nodename) { struct node *child; for_each_child(node, child) if (streq(child->name, nodename)) return child; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson45100.00%1100.00%
Total45100.00%1100.00%


struct node *get_node_by_path(struct node *tree, const char *path) { const char *p; struct node *child; if (!path || ! (*path)) { if (tree->deleted) return NULL; return tree; } while (path[0] == '/') path++; p = strchr(path, '/'); for_each_child(tree, child) { if (p && (strlen(child->name) == p-path) && strneq(path, child->name, p-path)) return get_node_by_path(child, p+1); else if (!p && streq(path, child->name)) return child; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson11883.10%133.33%
Rob Herring139.15%133.33%
Stephen Warren117.75%133.33%
Total142100.00%3100.00%


struct node *get_node_by_label(struct node *tree, const char *label) { struct node *child, *node; struct label *l; assert(label && (strlen(label) > 0)); for_each_label(tree->labels, l) if (streq(l->label, label)) return tree; for_each_child(tree, child) { node = get_node_by_label(child, label); if (node) return node; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson7986.81%150.00%
John Bonesio1213.19%150.00%
Total91100.00%2100.00%


struct node *get_node_by_phandle(struct node *tree, cell_t phandle) { struct node *child, *node; assert((phandle != 0) && (phandle != -1)); if (tree->phandle == phandle) { if (tree->deleted) return NULL; return tree; } for_each_child(tree, child) { node = get_node_by_phandle(child, phandle); if (node) return node; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson7787.50%150.00%
Stephen Warren1112.50%150.00%
Total88100.00%2100.00%


struct node *get_node_by_ref(struct node *tree, const char *ref) { if (streq(ref, "/")) return tree; else if (ref[0] == '/') return get_node_by_path(tree, ref); else return get_node_by_label(tree, ref); }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson4376.79%150.00%
Rob Herring1323.21%150.00%
Total56100.00%2100.00%


cell_t get_node_phandle(struct node *root, struct node *node) { static cell_t phandle = 1; /* FIXME: ick, static local */ if ((node->phandle != 0) && (node->phandle != -1)) return node->phandle; while (get_node_by_phandle(root, phandle)) phandle++; node->phandle = phandle; if (!get_property(node, "linux,phandle") && (phandle_format & PHANDLE_LEGACY)) add_property(node, build_property("linux,phandle", data_append_cell(empty_data, phandle))); if (!get_property(node, "phandle") && (phandle_format & PHANDLE_EPAPR)) add_property(node, build_property("phandle", data_append_cell(empty_data, phandle))); /* If the node *does* have a phandle property, we must * be dealing with a self-referencing phandle, which will be * fixed up momentarily in the caller */ return node->phandle; }

Contributors

PersonTokensPropCommitsCommitProp
David Gibson8361.03%150.00%
John Bonesio5338.97%150.00%
Total136100.00%2100.00%


uint32_t guess_boot_cpuid(struct node *tree) { struct node *cpus, *bootcpu; struct property *reg; cpus = get_node_by_path(tree, "/cpus"); if (!cpus) return 0; bootcpu = cpus->children; if (!bootcpu) return 0; reg = get_property(bootcpu, "reg"); if (!reg || (reg->val.len != sizeof(uint32_t))) return 0; /* FIXME: Sanity check node? */ return propval_cell(reg); }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio91100.00%1100.00%
Total91100.00%1100.00%


static int cmp_reserve_info(const void *ax, const void *bx) { const struct reserve_info *a, *b; a = *((const struct reserve_info * const *)ax); b = *((const struct reserve_info * const *)bx); if (a->address < b->address) return -1; else if (a->address > b->address) return 1; else if (a->size < b->size) return -1; else if (a->size > b->size) return 1; else return 0; }

Contributors

PersonTokensPropCommitsCommitProp
John Bonesio116100.00%1100.00%
Total116100.00%1100.00%


static void sort_reserve_entries(struct dt_info *dti) { struct reserve_info *ri, **tbl; int n = 0, i = 0; for (ri = dti->reservelist; ri; ri = ri->next) n++; if (n == 0) return; tbl = xmalloc(n * sizeof(*tbl)); for (ri = dti->reservelist; ri; ri = ri->next) tbl[i++] = ri; qsort(tbl, n, sizeof(*tbl), cmp_reserve_info); dti->reservelist =