scoutos / prex-0.9.0 / bsp / hal / arm / integrator / diag.c @ 03e9c04a
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1 | 03e9c04a | Brad Neuman | /*-
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2 | * Copyright (c) 2008, 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 | |||
38 | #include "platform.h" |
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39 | |||
40 | #define UART_FR (*(volatile uint32_t *)(UART_BASE + 0x18)) |
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41 | #define UART_DR (*(volatile uint32_t *)(UART_BASE + 0x00)) |
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42 | |||
43 | /* Flag register */
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44 | #define FR_RXFE 0x10 /* Receive FIFO empty */ |
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45 | #define FR_TXFF 0x20 /* Transmit FIFO full */ |
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46 | |||
47 | static void |
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48 | serial_putc(char c)
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49 | { |
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50 | |||
51 | while (UART_FR & FR_TXFF)
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52 | ; |
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53 | UART_DR = (uint32_t)c; |
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54 | } |
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55 | |||
56 | void
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57 | diag_puts(char *buf)
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58 | { |
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59 | |||
60 | while (*buf) {
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61 | if (*buf == '\n') |
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62 | serial_putc('\r');
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63 | serial_putc(*buf++); |
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64 | } |
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65 | } |
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66 | |||
67 | void
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68 | diag_init(void)
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69 | { |
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70 | |||
71 | #ifdef CONFIG_MMU
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72 | mmu_premap(0x16000000, UART_BASE);
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73 | #endif
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74 | } |