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