root / prex-0.9.0 / bsp / hal / ppc / prep / diag.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2009, Kohsuke Ohtani
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without
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6 | * modification, are permitted provided that the following conditions
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7 | * are met:
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8 | * 1. Redistributions of source code must retain the above copyright
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9 | * notice, this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright
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11 | * notice, this list of conditions and the following disclaimer in the
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12 | * documentation and/or other materials provided with the distribution.
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13 | * 3. Neither the name of the author nor the names of any co-contributors
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14 | * may be used to endorse or promote products derived from this software
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15 | * without specific prior written permission.
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16 | *
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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27 | * SUCH DAMAGE.
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28 | */
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29 | |||
30 | /*
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31 | * diag.c - diagnostic message support
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32 | */
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33 | |||
34 | #include <sys/bootinfo.h> |
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35 | #include <kernel.h> |
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36 | #include <cpufunc.h> |
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37 | #include <io.h> |
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38 | |||
39 | #ifdef CONFIG_DIAG_SERIAL
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40 | |||
41 | #define COM_BASE CONFIG_NS16550_BASE
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42 | #define COM_THR (COM_BASE + 0x00) /* transmit holding register */ |
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43 | #define COM_LSR (COM_BASE + 0x05) /* line status register */ |
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44 | |||
45 | static void |
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46 | serial_putc(char c)
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47 | { |
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48 | |||
49 | while (!(inb(COM_LSR) & 0x20)) |
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50 | ; |
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51 | outb(COM_THR, c); |
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52 | } |
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53 | |||
54 | void
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55 | diag_puts(char *str)
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56 | { |
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57 | |||
58 | while (*str) {
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59 | if (*str == '\n') |
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60 | serial_putc('\r');
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61 | serial_putc(*str++); |
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62 | } |
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63 | } |
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64 | |||
65 | /*
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66 | * We assume the serial port has already been initialized by
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67 | * the boot loader.
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68 | */
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69 | void
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70 | diag_init(void)
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71 | { |
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72 | /* DO NOTHING */
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73 | } |
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74 | #endif /* !CONFIG_DIAG_SERIAL */ |
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75 | |||
76 | #ifdef CONFIG_DIAG_QEMU
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77 | void
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78 | diag_puts(char *str)
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79 | { |
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80 | |||
81 | while (*str) {
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82 | /* Write to the qemu debug port. */
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83 | outb(0xf00, (u_char)*str++);
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84 | } |
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85 | } |
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86 | |||
87 | void
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88 | diag_init(void)
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89 | { |
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90 | } |
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91 | #endif /* !CONFIG_DIAG_QEMU */ |