Details | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1816 | decky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
1816 | decky | 3 | * All rights reserved. |
4 | * |
||
5 | * Redistribution and use in source and binary forms, with or without |
||
6 | * modification, are permitted provided that the following conditions |
||
7 | * are met: |
||
8 | * |
||
9 | * - Redistributions of source code must retain the above copyright |
||
10 | * notice, this list of conditions and the following disclaimer. |
||
11 | * - Redistributions in binary form must reproduce the above copyright |
||
12 | * notice, this list of conditions and the following disclaimer in the |
||
13 | * documentation and/or other materials provided with the distribution. |
||
14 | * - The name of the author may not be used to endorse or promote products |
||
15 | * derived from this software without specific prior written permission. |
||
16 | * |
||
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
||
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
||
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
||
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
||
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
||
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
||
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
27 | */ |
||
28 | |||
1952 | jermar | 29 | /** @addtogroup ia32xen |
1816 | decky | 30 | * @{ |
31 | */ |
||
32 | /** |
||
33 | * @file |
||
1952 | jermar | 34 | * @brief ia32xen console driver. |
1816 | decky | 35 | */ |
36 | |||
37 | #include <arch/drivers/xconsole.h> |
||
38 | #include <putchar.h> |
||
39 | #include <console/chardev.h> |
||
40 | #include <console/console.h> |
||
41 | #include <arch/hypercall.h> |
||
42 | |||
1831 | decky | 43 | #define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1)) |
44 | |||
1816 | decky | 45 | static void xen_putchar(chardev_t *d, const char ch); |
46 | |||
47 | chardev_t xen_console; |
||
48 | static chardev_operations_t xen_ops = { |
||
49 | .write = xen_putchar |
||
50 | }; |
||
51 | |||
52 | void xen_console_init(void) |
||
53 | { |
||
54 | chardev_initialize("xen_out", &xen_console, &xen_ops); |
||
55 | stdout = &xen_console; |
||
56 | } |
||
57 | |||
3844 | decky | 58 | void xen_putchar(chardev_t *d, const char ch, bool silent) |
1816 | decky | 59 | { |
3844 | decky | 60 | if (!silent) { |
61 | if (start_info.console.domU.evtchn != 0) { |
||
62 | uint32_t cons = console_page.out_cons; |
||
63 | uint32_t prod = console_page.out_prod; |
||
64 | |||
65 | memory_barrier(); |
||
66 | |||
67 | if ((prod - cons) > sizeof(console_page.out)) |
||
68 | return; |
||
69 | |||
70 | if (ch == '\n') |
||
71 | console_page.out[MASK_INDEX(prod++, console_page.out)] = '\r'; |
||
72 | console_page.out[MASK_INDEX(prod++, console_page.out)] = ch; |
||
73 | |||
74 | write_barrier(); |
||
75 | |||
76 | console_page.out_prod = prod; |
||
77 | |||
78 | xen_notify_remote(start_info.console.domU.evtchn); |
||
79 | } else |
||
80 | xen_console_io(CONSOLE_IO_WRITE, 1, &ch); |
||
81 | } |
||
1816 | decky | 82 | } |
83 | |||
84 | /** @} |
||
85 | */ |