mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
06ffd7956e
The m68k port's sun3 asm/oplib.h had a stray reference too, so I killed that off as well. Signed-off-by: David S. Miller <davem@davemloft.net>
298 lines
6.3 KiB
C
298 lines
6.3 KiB
C
/* $Id: tree.c,v 1.10 1998/01/10 22:39:00 ecd Exp $
|
|
* 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>
|
|
|
|
/* 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;
|
|
|
|
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;
|
|
}
|