int
prom_pathname(char *pathname)
{
char *from = buffer;
char *to = pathname;
cell_t ci[7];
if ((to == (char *)0) || (*to == (char)0))
return;
(void) prom_strcpy(from, to);
*to = (char)0;
ci[0] = p1275_ptr2cell("canon"); /* Service name */
ci[1] = (cell_t)3; /* #argument cells */
ci[2] = (cell_t)1; /* #result cells */
ci[3] = p1275_ptr2cell(from); /* Arg1: device specifier */
ci[4] = p1275_ptr2cell(to); /* Arg2: buffer address */
ci[5] = p1275_uint2cell(OBP_MAXPATHLEN); /* Arg3: buffer length */
ci[6] = (cell_t)-1;
(void) p1275_cif_handler(&ci);
return (p1275_cell2int(ci[6])); /* Res1: length */
}
/*
* Here we use the "screen-#columns" and "screen-#rows" settings of
* PROM to help us decide the console size and cursor position. The
* actual sizes of PROM's TEM and the console might be different with
* those "screen-#.." settings, in cases that they are too big to
* accommodate.
*/
void
prom_get_tem_size(size_t *height, size_t *width)
{
char buf[MAXPATHLEN];
char name[16];
pnode_t node;
int len;
if ((node = prom_optionsnode()) == OBP_BADNODE)
return;
(void) prom_strcpy(name, "screen-#rows");
if ((len = prom_getproplen(node, (caddr_t)name)) > 0) {
(void) prom_getprop(node, (caddr_t)name, (caddr_t)buf);
*height = prom_atol(buf, len);
}
(void) prom_strcpy(name, "screen-#columns");
if ((len = prom_getproplen(node, (caddr_t)name)) > 0) {
(void) prom_getprop(node, (caddr_t)name, (caddr_t)buf);
*width = prom_atol(buf, len);
}
}
caddr_t
prom_nextprop(pnode_t nodeid, caddr_t previous, caddr_t next)
{
cell_t ci[7];
(void) prom_strcpy(next, ""); /* Prime result, in case call fails */
ci[0] = p1275_ptr2cell("nextprop"); /* Service name */
ci[1] = (cell_t)3; /* #argument cells */
ci[2] = (cell_t)0; /* #result cells */
ci[3] = p1275_phandle2cell((phandle_t)nodeid); /* Arg1: phandle */
ci[4] = p1275_ptr2cell(previous); /* Arg2: addr of prev name */
ci[5] = p1275_ptr2cell(next); /* Arg3: addr of 32 byte buf */
promif_preprom();
(void) p1275_cif_handler(&ci);
promif_postprom();
return (next);
}
/*
* Returns 0 on error. Otherwise returns a handle.
*/
int
prom_open(char *path)
{
cell_t ci[5];
promif_owrap_t *ow;
#ifdef PROM_32BIT_ADDRS
char *opath = NULL;
size_t len;
if ((uintptr_t)path > (uint32_t)-1) {
opath = path;
len = prom_strlen(opath) + 1; /* include terminating NUL */
path = promplat_alloc(len);
if (path == NULL)
return (0);
(void) prom_strcpy(path, opath);
}
#endif
ow = promif_preout();
promif_preprom();
ci[0] = p1275_ptr2cell("open"); /* Service name */
ci[1] = (cell_t)1; /* #argument cells */
ci[2] = (cell_t)1; /* #result cells */
ci[3] = p1275_ptr2cell(path); /* Arg1: Pathname */
ci[4] = (cell_t)0; /* Res1: Prime result */
(void) p1275_cif_handler(&ci);
promif_postprom();
promif_postout(ow);
#ifdef PROM_32BIT_ADDRS
if (opath != NULL)
promplat_free(path, len);
#endif
return (p1275_cell2int(ci[4])); /* Res1: ihandle */
}
pnode_t
prom_finddevice(char *path)
{
cell_t ci[5];
#ifdef PROM_32BIT_ADDRS
char *opath = NULL;
size_t len;
if ((uintptr_t)path > (uint32_t)-1) {
opath = path;
len = prom_strlen(opath) + 1; /* include terminating NUL */
path = promplat_alloc(len);
if (path == NULL) {
return (OBP_BADNODE);
}
(void) prom_strcpy(path, opath);
}
#endif
promif_preprom();
ci[0] = p1275_ptr2cell("finddevice"); /* Service name */
ci[1] = (cell_t)1; /* #argument cells */
ci[2] = (cell_t)1; /* #result cells */
ci[3] = p1275_ptr2cell(path); /* Arg1: pathname */
ci[4] = p1275_dnode2cell(OBP_BADNODE); /* Res1: Prime result */
(void) p1275_cif_handler(&ci);
promif_postprom();
#ifdef PROM_32BIT_ADDRS
if (opath != NULL)
promplat_free(path, len);
#endif
return ((pnode_t)p1275_cell2dnode(ci[4])); /* Res1: phandle */
}
