patch-2.1.19 linux/arch/sparc64/prom/tree.c

• Lines: 293
• Date: Mon Dec 30 11:59:59 1996
• Orig file: v2.1.18/linux/arch/sparc64/prom/tree.c
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v2.1.18/linux/arch/sparc64/prom/tree.c linux/arch/sparc64/prom/tree.c
@@ -0,0 +1,292 @@
+/* $Id: tree.c,v 1.1 1996/12/27 08:49:13 jj 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 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
+ */
+
+#include <linux/config.h>
+#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)
+{
+	long cnode;
+
+	if(node == -1) return 0;
+	cnode = (*prom_command)("child", 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)
+{
+	long sibnode;
+
+	if(node == -1) return 0;
+	sibnode = (*prom_command)("peer", P1275_INOUT(1, 1), node);
+	if(cnode == -1) return 0;
+	return (int)sibnode;
+}
+
+/* Return the length in bytes of property 'prop' at node 'node'.
+ * Return -1 on error.
+ */
+__inline__ int
+prom_getproplen(int node, char *prop)
+{
+	if((!node) || (!prop)) return -1;
+	return (*prom_command)("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, 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 (*prom_command)("getprop", 
+				       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, 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, 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, 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, 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, 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, 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;
+}
+
+/* Gets name in the {name@x,yyyyy|name (if no reg)} form */
+int 
+prom_getname (int node, char *buffer, int len)
+{
+	int i;
+	struct linux_prom_registers reg[PROMREG_MAX];
+	
+	i = prom_getproperty (node, "name", buffer, len);
+	if (i <= 0) return -1;
+	buffer [i] = 0;
+	len -= i;
+	i = prom_getproperty (node, "reg", (char *)reg, sizeof (reg));
+	if (i <= 0) return 0;
+	if (len < 11) return -1;
+	buffer = strchr (buffer, 0);
+	sprintf (buffer, "@%x,%x", reg[0].which_io, (uint)reg[0].phys_addr);
+	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)
+{
+	if(node == -1) return "";
+	*buffer = 0;
+	(*prom_command)("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, char *oprop, char *buffer)
+{
+	char buf[32];
+
+	if(node == -1) return "";
+	*buffer = 0;
+	(*prom_command)("nextprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
+				    P1275_ARG(2,P1275_ARG_OUT_32B)|
+				    P1275_INOUT(3, 0), 
+				    node, oprop, (oprop == buffer) ? 
+				    buf : buffer);
+	if (oprop == buffer) strcpy (buffer, buf);
+	return buffer;
+}
+
+int
+prom_finddevice(char *name)
+{
+	if(!name) return 0;
+	*buffer = 0;
+	(*prom_command)("finddevice", P1275_ARG(0,P1275_ARG_IN_STRING)|
+				      P1275_INOUT(1, 1), 
+				      name);
+	return buffer;
+}
+
+int
+prom_node_has_property(int node, char *prop)
+{
+	char buf[32];
+	char *current_property = buf;
+	
+	*buf = 0;
+	do {
+		current_property = prom_nextprop(node, current_property, buf);
+		if(!strcmp(current_property, prop))
+			return 1;
+	} while (*current_property);
+	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, char *pname, char *value, int size)
+{
+	unsigned long flags;
+	int ret;
+
+	if(size == 0) return 0;
+	if((pname == 0) || (value == 0)) return 0;
+	
+	return (*prom_command)("setprop", P1275_ARG(1,P1275_ARG_IN_STRING)|
+					  P1275_ARG(2,P1275_ARG_OUT_BUF)|
+					  P1275_INOUT(4, 1), 
+					  node, pname, value, P1275_SIZE(size));
+}
+
+__inline__ int
+prom_inst2pkg(int inst)
+{
+	int node;
+	
+	node = (*prom_command)("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(char *path)
+{
+	int node, inst;
+	
+	inst = prom_devopen (path);
+	if (inst == -1) return 0;
+	node = prom_inst2pkg (inst);
+	prom_devclose (inst);
+	if (node == -1) return 0;
+	return node;
+}