litmus-rt.git - The LITMUS^RT kernel.

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author	Andrea Bastoni <bastoni@cs.unc.edu>	2010-05-30 19:16:45 -0400
committer	Andrea Bastoni <bastoni@cs.unc.edu>	2010-05-30 19:16:45 -0400
commit	ada47b5fe13d89735805b566185f4885f5a3f750 (patch)
tree	644b88f8a71896307d71438e9b3af49126ffb22b /arch/m68k/sun3/sun3ints.c
parent	43e98717ad40a4ae64545b5ba047c7b86aa44f4f (diff)
parent	3280f21d43ee541f97f8cda5792150d2dbec20d5 (diff)

Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

Diffstat (limited to 'arch/m68k/sun3/sun3ints.c')

0 files changed, 0 insertions, 0 deletions

/* * proc_devtree.c - handles /proc/device-tree * * Copyright 1997 Paul Mackerras */ #include <linux/errno.h> #include <linux/time.h> #include <linux/proc_fs.h> #include <linux/stat.h> #include <linux/string.h> #include <asm/prom.h> #include <asm/uaccess.h> #ifndef HAVE_ARCH_DEVTREE_FIXUPS static inline void set_node_proc_entry(struct device_node *np, struct proc_dir_entry *de) { } #endif static struct proc_dir_entry *proc_device_tree; /* * Supply data on a read from /proc/device-tree/node/property. */ static int property_read_proc(char *page, char **start, off_t off, int count, int *eof, void *data) { struct property *pp = data; int n; if (off >= pp->length) { *eof = 1; return 0; } n = pp->length - off; if (n > count) n = count; else *eof = 1; memcpy(page, pp->value + off, n); *start = page; return n; } /* * For a node with a name like "gc@10", we make symlinks called "gc" * and "@10" to it. */ /* * Add a property to a node */ static struct proc_dir_entry * __proc_device_tree_add_prop(struct proc_dir_entry *de, struct property *pp) { struct proc_dir_entry *ent; /* * Unfortunately proc_register puts each new entry * at the beginning of the list. So we rearrange them. */ ent = create_proc_read_entry(pp->name, strncmp(pp->name, "security-", 9) ? S_IRUGO : S_IRUSR, de, property_read_proc, pp); if (ent == NULL) return NULL; if (!strncmp(pp->name, "security-", 9)) ent->size = 0; /* don't leak number of password chars */ else ent->size = pp->length; return ent; } void proc_device_tree_add_prop(struct proc_dir_entry *pde, struct property *prop) { __proc_device_tree_add_prop(pde, prop); } void proc_device_tree_remove_prop(struct proc_dir_entry *pde, struct property *prop) { remove_proc_entry(prop->name, pde); } void proc_device_tree_update_prop(struct proc_dir_entry *pde, struct property *newprop, struct property *oldprop) { struct proc_dir_entry *ent; for (ent = pde->subdir; ent != NULL; ent = ent->next) if (ent->data == oldprop) break; if (ent == NULL) { printk(KERN_WARNING "device-tree: property \"%s\" " " does not exist\n", oldprop->name); } else { ent->data = newprop; ent->size = newprop->length; } } /* * Process a node, adding entries for its children and its properties. */ void proc_device_tree_add_node(struct device_node *np, struct proc_dir_entry *de) { struct property *pp; struct proc_dir_entry *ent; struct device_node *child; const char *p; set_node_proc_entry(np, de); for (child = NULL; (child = of_get_next_child(np, child));) { p = strrchr(child->full_name, '/'); if (!p) p = child->full_name; else ++p; ent = proc_mkdir(p, de); if (ent == 0) break; proc_device_tree_add_node(child, ent); } of_node_put(child); for (pp = np->properties; pp != 0; pp = pp->next) { /* * Yet another Apple device-tree bogosity: on some machines, * they have properties & nodes with the same name. Those * properties are quite unimportant for us though, thus we * simply "skip" them here, but we do have to check. */ spin_lock(&proc_subdir_lock); for (ent = de->subdir; ent != NULL; ent = ent->next) if (!strcmp(ent->name, pp->name)) break; spin_unlock(&proc_subdir_lock); if (ent != NULL) { printk(KERN_WARNING "device-tree: property \"%s\" name" " conflicts with node in %s\n", pp->name, np->full_name); continue; } ent = __proc_device_tree_add_prop(de, pp); if (ent == 0) break; } } /* * Called on initialization to set up the /proc/device-tree subtree */ void proc_device_tree_init(void) { struct device_node *root; if ( !have_of ) return; proc_device_tree = proc_mkdir("device-tree", NULL); if (proc_device_tree == 0) return; root = of_find_node_by_path("/"); if (root == 0) { printk(KERN_ERR "/proc/device-tree: can't find root\n"); return; } proc_device_tree_add_node(root, proc_device_tree); of_node_put(root); }


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