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/*
* Creation Date: <2003/11/18 14:55:05 samuel>
* Time-stamp: <2004/03/27 02:03:55 samuel>
*
* <tree.c>
*
* device tree setup
*
* Copyright (C) 2003, 2004 Samuel Rydh (samuel@ibrium.se)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2
*
*/
#include "config.h"
#include "libopenbios/bindings.h"
#include "mol/mol.h"
#include "mol/prom.h"
/************************************************************************/
/* copy device tree */
/************************************************************************/
static void
copy_node( mol_phandle_t molph )
{
char name[40], path[80];
int exists;
phandle_t ph;
if( !molph )
return;
prom_package_to_path( molph, path, sizeof(path) );
/* don't copy /options node */
if( !strcmp("/options", path) ) {
copy_node( prom_peer(molph) );
return;
}
exists = 1;
if( !(ph=find_dev(path)) ) {
exists = 0;
fword("new-device");
ph = get_cur_dev();
}
activate_dev( ph );
name[0] = 0;
while( prom_next_prop(molph, name, name) > 0 ) {
int len = prom_get_prop_len( molph, name );
char *p;
#if 0
if( len > 0x1000 ) {
printk("prop to large (%d)\n", len );
continue;
}
#endif
/* don't copy /chosen/{stdin,stdout} (XXX: ugly hack...) */
if( !strcmp("/chosen", path) )
if( !strcmp("stdio", name) || !strcmp("stdout", name) )
continue;
p = malloc( len );
prom_get_prop( molph, name, p, len );
set_property( ph, name, p, len );
free( p );
}
set_int_property( ph, "MOL,phandle", molph );
copy_node( prom_child(molph) );
if( !exists )
fword("finish-device");
else
activate_device("..");
copy_node( prom_peer(molph) );
}
/************************************************************************/
/* device tree cloning and tweaking */
/************************************************************************/
static phandle_t
translate_molph( mol_phandle_t molph )
{
static mol_phandle_t cached_molph;
static phandle_t cached_ph;
phandle_t ph=0;
if( cached_molph == molph )
return cached_ph;
while( (ph=dt_iterate(ph)) )
if( get_int_property(ph, "MOL,phandle", NULL) == molph )
break;
cached_molph = molph;
cached_ph = ph;
if( !ph )
printk("failed to translate molph\n");
return ph;
}
static void
fix_phandles( void )
{
static char *pnames[] = { "interrupt-parent", "interrupt-controller", NULL } ;
int len, *map;
phandle_t ph=0;
char **pp;
while( (ph=dt_iterate(ph)) ) {
for( pp=pnames; *pp; pp++ ) {
phandle_t *p = (phandle_t*)get_property( ph, *pp, &len );
if( len == 4 )
*p = translate_molph( *(int*)p );
}
/* need to fix interrupt map properties too */
if( (map=(int*)get_property(ph, "interrupt-map", &len)) ) {
int i, acells = get_int_property(ph, "#address-cells", NULL);
int icells = get_int_property(ph, "#interrupt-cells", NULL);
len /= sizeof(int);
for( i=0; i<len; i++ ) {
phandle_t ch_ph;
int ch_acells, ch_icells;
i += acells + icells;
if( !(ch_ph=translate_molph(map[i])) )
break;
map[i] = (int)ch_ph;
ch_acells = get_int_property(ch_ph, "#address-cells", NULL);
ch_icells = get_int_property(ch_ph, "#interrupt-cells", NULL);
i += ch_acells + icells;
}
if( i != len )
printk("interrupt map fixing failure\n");
}
}
/* delete MOL,phandle properties */
for( ph=0; (ph=dt_iterate(ph)) ; ) {
push_str("MOL,phandle");
PUSH_ph(ph);
fword("(delete-property)");
}
fword("device-end");
}
void
devtree_init( void )
{
activate_device("/");
copy_node( prom_peer(0) );
fix_phandles();
fword("tree-fixes");
}
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