Subversion Repositories HelenOS

Rev

Rev 1816 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed

Rev 1816 Rev 1831
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 xen32
 29 
/** @addtogroup xen32
30 
 * @{
 30 
 * @{
31 
 */
 31 
 */
32 
/**
 32 
/**
33 
 * @file
 33 
 * @file
34 
 * @brief Xen32 console driver.
 34 
 * @brief Xen32 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 
#include <mm/frame.h>
42 
 
 43 
 
- 
 
 44 
#define MASK_INDEX(index, ring) ((index) & (sizeof(ring) - 1))
- 
 
 45 
 
- 
 
 46 
typedef struct {
- 
 
 47 
    char in[1024];
- 
 
 48 
    char out[2048];
- 
 
 49 
    uint32_t in_cons;
- 
 
 50 
    uint32_t in_prod;
- 
 
 51 
    uint32_t out_cons;
- 
 
 52 
    uint32_t out_prod;
- 
 
 53 
} xencons_t;
- 
 
 54 
 
- 
 
 55 
static bool asynchronous = false;
43 
static void xen_putchar(chardev_t *d, const char ch);
 56 
static void xen_putchar(chardev_t *d, const char ch);
44 
 
 57 
 
45 
chardev_t xen_console;
 58 
chardev_t xen_console;
46 
static chardev_operations_t xen_ops = {
 59 
static chardev_operations_t xen_ops = {
47 
    .write = xen_putchar
 60 
    .write = xen_putchar
48 
};
 61 
};
49 
 
 62 
 
50 
void xen_console_init(void)
 63 
void xen_console_init(void)
51 
{
 64 
{
52 
    chardev_initialize("xen_out", &xen_console, &xen_ops);
 65 
    chardev_initialize("xen_out", &xen_console, &xen_ops);
53 
    stdout = &xen_console;
 66 
    stdout = &xen_console;
- 
 
 67 
    if (!(start_info.flags & SIF_INITDOMAIN))
- 
 
 68 
        asynchronous = true;
54 
}
 69 
}
55 
 
 70 
 
56 
void xen_putchar(chardev_t *d, const char ch)
 71 
void xen_putchar(chardev_t *d, const char ch)
57 
{
 72 
{
- 
 
 73 
    if (asynchronous) {
- 
 
 74 
        xencons_t *console = (xencons_t *) PA2KA(MA2PA(PFN2ADDR(start_info.console_mfn)));
- 
 
 75 
        uint32_t cons = console->out_cons;
- 
 
 76 
        uint32_t prod = console->out_prod;
- 
 
 77 
       
- 
 
 78 
        memory_barrier();
- 
 
 79 
       
- 
 
 80 
        if ((prod - cons) > sizeof(console->out))
- 
 
 81 
            return;
- 
 
 82 
       
- 
 
 83 
        if (ch == '\n')
- 
 
 84 
            console->out[MASK_INDEX(prod++, console->out)] = '\r';
- 
 
 85 
        console->out[MASK_INDEX(prod++, console->out)] = ch;
- 
 
 86 
       
- 
 
 87 
        write_barrier();
- 
 
 88 
       
- 
 
 89 
        console->out_prod = prod;
- 
 
 90 
       
- 
 
 91 
        xen_notify_remote(start_info.console_evtchn);
- 
 
 92 
    } else
58 
    xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
 93 
        xen_console_io(CONSOLE_IO_WRITE, 1, &ch);
59 
}
 94 
}
60 
 
 95 
 
61 
/** @}
 96 
/** @}
62 
 */
 97 
 */
63 
 
 98