source: trunk/packages/xen-3.1/xen-3.1/xen/arch/powerpc/papr/vterm.c @ 34

Last change on this file since 34 was 34, checked in by hartmans, 18 years ago

Add xen and xen-common

File size: 1.9 KB
Line 
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: Hollis Blanchard <hollisb@us.ibm.com>
19 */
20
21#include <xen/config.h>
22#include <xen/types.h>
23#include <xen/sched.h>
24#include <xen/init.h>
25#include <public/xen.h>
26#include <asm/current.h>
27#include <asm/papr.h>
28#include <asm/hcalls.h>
29
30static void h_put_term_char(struct cpu_user_regs *regs)
31{
32    char data[(sizeof (u64) * 4) + 1];
33    ulong count;
34    extern void serial_puts(int handle, const char *s);
35
36    /* XXX what to do with 'channel' in r4? */
37
38    count = regs->gprs[5];
39    if (count > 16) {
40        regs->gprs[3] = H_Parameter;
41        return;
42    }
43
44    memcpy(data, &regs->gprs[6], count);
45    data[count] = '\0';
46
47    serial_puts(0, data);
48    regs->gprs[3] = H_Success;
49}
50
51static void h_get_term_char(struct cpu_user_regs *regs)
52{
53    /* temporary hack to let us use xmon in dom0 */
54    extern char serial_getc_nb(int handle);
55    char c;
56
57    c = serial_getc_nb(0);
58    if (> 0)  {
59        regs->gprs[4] = 1;
60        regs->gprs[5] = (ulong)c << (7 * 8);
61        regs->gprs[6] = 0;        /* paranoid */
62    } else {
63        regs->gprs[4] = 0;
64    }
65
66    regs->gprs[3] = H_Success;
67}
68
69__init_papr_hcall(H_PUT_TERM_CHAR, h_put_term_char);
70__init_papr_hcall(H_GET_TERM_CHAR, h_get_term_char);
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