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1595 | palkovsky | 1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
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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 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <mm/frame.h> |
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30 | #include <sysinfo/sysinfo.h> |
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31 | #include <console/klog.h> |
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32 | #include <print.h> |
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33 | #include <ipc/irq.h> |
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34 | |||
35 | /* Order of frame to be allocated for klog communication */ |
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36 | #define KLOG_ORDER 0 |
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37 | |||
38 | static char *klog; |
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39 | static int klogsize; |
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40 | static int klogpos; |
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41 | |||
42 | SPINLOCK_INITIALIZE(klog_lock); |
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43 | |||
44 | /** Initialize kernel loggin facility |
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45 | * |
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46 | * Allocate pages that are to be shared if uspace for console data |
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47 | */ |
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48 | void klog_init(void) |
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49 | { |
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50 | void *faddr; |
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51 | |||
52 | faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC)); |
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53 | if (!faddr) |
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54 | panic("Cannot allocate page for klog"); |
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55 | klog = (char *)PA2KA(faddr); |
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56 | |||
57 | sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr); |
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58 | sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER); |
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59 | |||
60 | klogsize = PAGE_SIZE << KLOG_ORDER; |
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61 | klogpos = 0; |
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62 | } |
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63 | |||
64 | static void klog_vprintf(const char *fmt, va_list args) |
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65 | { |
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66 | int ret; |
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67 | va_list atst; |
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68 | |||
69 | va_copy(atst, args); |
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70 | spinlock_lock(&klog_lock); |
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71 | |||
72 | ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst); |
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1613 | palkovsky | 73 | if (ret >= klogsize-klogpos) { |
1595 | palkovsky | 74 | klogpos = 0; |
1613 | palkovsky | 75 | if (ret >= klogsize) |
1595 | palkovsky | 76 | goto out; |
77 | } |
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78 | ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret); |
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79 | klogpos += ret; |
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80 | if (klogpos >= klogsize) |
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81 | klogpos = 0; |
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82 | out: |
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83 | spinlock_unlock(&klog_lock); |
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84 | va_end(atst); |
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85 | } |
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86 | |||
87 | /** Printf a message to kernel-uspace log */ |
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88 | void klog_printf(const char *fmt, ...) |
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89 | { |
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90 | va_list args; |
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91 | |||
92 | va_start(args, fmt); |
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93 | |||
94 | klog_vprintf(fmt, args); |
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95 | |||
96 | va_end(args); |
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97 | } |