+++ /dev/null
-/*
- * tree.c: Basic device tree traversal/scanning for the Linux
- * prom library.
- *
- * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
- * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
- */
-
-#include <linux/string.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-
-#include <asm/openprom.h>
-#include <asm/oplib.h>
-#include <asm/ldc.h>
-
-/* Return the child of node 'node' or zero if no this node has no
- * direct descendent.
- */
-inline int __prom_getchild(int node)
-{
- return p1275_cmd ("child", P1275_INOUT(1, 1), node);
-}
-
-inline int prom_getchild(int node)
-{
- int cnode;
-
- if(node == -1) return 0;
- cnode = __prom_getchild(node);
- if(cnode == -1) return 0;
- return (int)cnode;
-}
-
-inline int prom_getparent(int node)
-{
- int cnode;
-
- if(node == -1) return 0;
- cnode = p1275_cmd ("parent", P1275_INOUT(1, 1), node);
- if(cnode == -1) return 0;
- return (int)cnode;
-}
-
-/* Return the next sibling of node 'node' or zero if no more siblings
- * at this level of depth in the tree.
- */
-inline int __prom_getsibling(int node)
-{
- return p1275_cmd(prom_peer_name, P1275_INOUT(1, 1), node);
-}
-
-inline int prom_getsibling(int node)
-{
- int sibnode;
-
- if (node == -1)
- return 0;
- sibnode = __prom_getsibling(node);
- if (sibnode == -1)
- return 0;
-
- return sibnode;
-}
-
-/* Return the length in bytes of property 'prop' at node 'node'.
- * Return -1 on error.
- */
-inline int prom_getproplen(int node, const char *prop)
-{
- if((!node) || (!prop)) return -1;
- return p1275_cmd ("getproplen",
- P1275_ARG(1,P1275_ARG_IN_STRING)|
- P1275_INOUT(2, 1),
- node, prop);
-}
-
-/* Acquire a property 'prop' at node 'node' and place it in
- * 'buffer' which has a size of 'bufsize'. If the acquisition
- * was successful the length will be returned, else -1 is returned.
- */
-inline int prom_getproperty(int node, const char *prop,
- char *buffer, int bufsize)
-{
- int plen;
-
- plen = prom_getproplen(node, prop);
- if ((plen > bufsize) || (plen == 0) || (plen == -1)) {
- return -1;
- } else {
- /* Ok, things seem all right. */
- return p1275_cmd(prom_getprop_name,
- P1275_ARG(1,P1275_ARG_IN_STRING)|
- P1275_ARG(2,P1275_ARG_OUT_BUF)|
- P1275_INOUT(4, 1),
- node, prop, buffer, P1275_SIZE(plen));
- }
-}
-
-/* Acquire an integer property and return its value. Returns -1
- * on failure.
- */
-inline int prom_getint(int node, const char *prop)
-{
- int intprop;
-
- if(prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1)
- return intprop;
-
- return -1;
-}
-
-/* Acquire an integer property, upon error return the passed default
- * integer.
- */
-
-int prom_getintdefault(int node, const char *property, int deflt)
-{
- int retval;
-
- retval = prom_getint(node, property);
- if(retval == -1) return deflt;
-
- return retval;
-}
-
-/* Acquire a boolean property, 1=TRUE 0=FALSE. */
-int prom_getbool(int node, const char *prop)
-{
- int retval;
-
- retval = prom_getproplen(node, prop);
- if(retval == -1) return 0;
- return 1;
-}
-
-/* Acquire a property whose value is a string, returns a null
- * string on error. The char pointer is the user supplied string
- * buffer.
- */
-void prom_getstring(int node, const char *prop, char *user_buf, int ubuf_size)
-{
- int len;
-
- len = prom_getproperty(node, prop, user_buf, ubuf_size);
- if(len != -1) return;
- user_buf[0] = 0;
- return;
-}
-
-
-/* Does the device at node 'node' have name 'name'?
- * YES = 1 NO = 0
- */
-int prom_nodematch(int node, const char *name)
-{
- char namebuf[128];
- prom_getproperty(node, "name", namebuf, sizeof(namebuf));
- if(strcmp(namebuf, name) == 0) return 1;
- return 0;
-}
-
-/* Search siblings at 'node_start' for a node with name
- * 'nodename'. Return node if successful, zero if not.
- */
-int prom_searchsiblings(int node_start, const char *nodename)
-{
-
- int thisnode, error;
- char promlib_buf[128];
-
- for(thisnode = node_start; thisnode;
- thisnode=prom_getsibling(thisnode)) {
- error = prom_getproperty(thisnode, "name", promlib_buf,
- sizeof(promlib_buf));
- /* Should this ever happen? */
- if(error == -1) continue;
- if(strcmp(nodename, promlib_buf)==0) return thisnode;
- }
-
- return 0;
-}
-
-/* Return the first property type for node 'node'.
- * buffer should be at least 32B in length
- */
-inline char *prom_firstprop(int node, char *buffer)
-{
- *buffer = 0;
- if(node == -1) return buffer;
- p1275_cmd ("nextprop", P1275_ARG(2,P1275_ARG_OUT_32B)|
- P1275_INOUT(3, 0),
- node, (char *) 0x0, buffer);
- return buffer;
-}
-
-/* Return the property type string after property type 'oprop'
- * at node 'node' . Returns NULL string if no more
- * property types for this node.
- */
-inline char *prom_nextprop(int node, const char *oprop, char *buffer)
-{
- char buf[32];
-
- if(node == -1) {
- *buffer = 0;
- return buffer;
- }
- if (oprop == buffer) {
- strcpy (buf, oprop);
- oprop = buf;
- }
- p1275_cmd ("nextprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
- P1275_ARG(2,P1275_ARG_OUT_32B)|
- P1275_INOUT(3, 0),
- node, oprop, buffer);
- return buffer;
-}
-
-int
-prom_finddevice(const char *name)
-{
- if (!name)
- return 0;
- return p1275_cmd(prom_finddev_name,
- P1275_ARG(0,P1275_ARG_IN_STRING)|
- P1275_INOUT(1, 1),
- name);
-}
-
-int prom_node_has_property(int node, const char *prop)
-{
- char buf [32];
-
- *buf = 0;
- do {
- prom_nextprop(node, buf, buf);
- if(!strcmp(buf, prop))
- return 1;
- } while (*buf);
- return 0;
-}
-
-/* Set property 'pname' at node 'node' to value 'value' which has a length
- * of 'size' bytes. Return the number of bytes the prom accepted.
- */
-int
-prom_setprop(int node, const char *pname, char *value, int size)
-{
- if (size == 0)
- return 0;
- if ((pname == 0) || (value == 0))
- return 0;
-
-#ifdef CONFIG_SUN_LDOMS
- if (ldom_domaining_enabled) {
- ldom_set_var(pname, value);
- return 0;
- }
-#endif
- return p1275_cmd ("setprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
- P1275_ARG(2,P1275_ARG_IN_BUF)|
- P1275_INOUT(4, 1),
- node, pname, value, P1275_SIZE(size));
-}
-
-inline int prom_inst2pkg(int inst)
-{
- int node;
-
- node = p1275_cmd ("instance-to-package", P1275_INOUT(1, 1), inst);
- if (node == -1) return 0;
- return node;
-}
-
-/* Return 'node' assigned to a particular prom 'path'
- * FIXME: Should work for v0 as well
- */
-int
-prom_pathtoinode(const char *path)
-{
- int node, inst;
-
- inst = prom_devopen (path);
- if (inst == 0) return 0;
- node = prom_inst2pkg (inst);
- prom_devclose (inst);
- if (node == -1) return 0;
- return node;
-}
-
-int prom_ihandle2path(int handle, char *buffer, int bufsize)
-{
- return p1275_cmd("instance-to-path",
- P1275_ARG(1,P1275_ARG_OUT_BUF)|
- P1275_INOUT(3, 1),
- handle, buffer, P1275_SIZE(bufsize));
-}
git.samba.org / sfrench / cifs-2.6.git / blobdiff