direct-io.hg

view xen/arch/powerpc/of_handler/vdevice.c @ 15490:06a32f040d64

[POWERPC][FIRMWARE] Firmware can now provide an RTAS stub

If the firmwares devtree contains a /rtas node, then firmware will
supply the interfaces that will allow a small RTAS stub to be
instantiated. The RTAS stub is simply an hvcall that passes the RTAS
command block to the hypervisor.

Signed-off-by: Jimi Xenidis <jimix@watson.ibm.com>
author Jimi Xenidis <jimix@watson.ibm.com>
date Sun Jun 03 10:39:31 2007 -0400 (2007-06-03)
parents 050de6b53961
children
line source
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License as published by
4 * the Free Software Foundation; either version 2 of the License, or
5 * (at your option) any later version.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 *
16 * Copyright (C) IBM Corp. 2005
17 *
18 * Authors: Jimi Xenidis <jimix@watson.ibm.com>
19 */
21 #include "ofh.h"
23 static struct ofh_ihandle _ih_cons;
25 void
26 ofh_vty_init(ofdn_t chosen, ulong b)
27 {
28 void *mem = ofd_mem(b);
29 u32 ih = DRELA((u32)&_ih_cons, b);
30 struct ofh_ihandle *ihp = (struct ofh_ihandle *)((ulong)ih);
31 ofdn_t n = 0;
32 s32 ret;
33 u32 chan = OFH_CONS_XEN;
35 ihp->ofi_intf = NULL;
37 /* find the vty */
38 n = ofd_node_find(mem,
39 DRELA((const char *)"/vdevice/vty", b));
40 if (n > 0) {
41 /* PAPR VTERM */
42 ret = ofd_getprop(mem, n, DRELA((const char *)"reg", b),
43 &chan, sizeof (chan));
44 if (ret != (s32)sizeof (chan)) {
45 chan = 0;
46 }
47 } else {
48 /* xen console */
49 u32 addr;
51 n = ofd_node_find(mem, DRELA((const char *)"/xen/console", b));
52 if (n > 0) {
53 ret = ofd_getprop(mem, n, DRELA((const char *)"reg", b),
54 &addr, sizeof (addr));
55 if (addr == 0) {
56 ihp->ofi_intf = NULL;
57 } else {
58 ihp->ofi_intf = (struct xencons_interface *)(ulong)addr;
59 }
60 }
61 }
62 if (n > 0) {
63 ihp->ofi_node = n;
64 }
65 ihp->ofi_chan = chan;
66 ofh_cons_init(ihp, b);
68 ofd_prop_add(mem, chosen, DRELA((const char *)"stdout", b),
69 &ih, sizeof (ih));
70 ofd_prop_add(mem, chosen, DRELA((const char *)"stdin", b),
71 &ih, sizeof (ih));
72 }