Rev 1595 | Rev 1643 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1595 | palkovsky | 1 | /* |
| 2 | * Copyright (C) 2006 Ondrej Palkovsky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #include <mm/frame.h> |
||
| 30 | #include <sysinfo/sysinfo.h> |
||
| 31 | #include <console/klog.h> |
||
| 32 | #include <print.h> |
||
| 33 | #include <ipc/irq.h> |
||
| 34 | |||
| 35 | /* Order of frame to be allocated for klog communication */ |
||
| 36 | #define KLOG_ORDER 0 |
||
| 37 | |||
| 38 | static char *klog; |
||
| 39 | static int klogsize; |
||
| 40 | static int klogpos; |
||
| 41 | |||
| 42 | SPINLOCK_INITIALIZE(klog_lock); |
||
| 43 | |||
| 44 | /** Initialize kernel loggin facility |
||
| 45 | * |
||
| 46 | * Allocate pages that are to be shared if uspace for console data |
||
| 47 | */ |
||
| 48 | void klog_init(void) |
||
| 49 | { |
||
| 50 | void *faddr; |
||
| 51 | |||
| 52 | faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC)); |
||
| 53 | if (!faddr) |
||
| 54 | panic("Cannot allocate page for klog"); |
||
| 55 | klog = (char *)PA2KA(faddr); |
||
| 56 | |||
| 57 | sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr); |
||
| 58 | sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER); |
||
| 59 | |||
| 60 | klogsize = PAGE_SIZE << KLOG_ORDER; |
||
| 61 | klogpos = 0; |
||
| 62 | } |
||
| 63 | |||
| 64 | static void klog_vprintf(const char *fmt, va_list args) |
||
| 65 | { |
||
| 66 | int ret; |
||
| 67 | va_list atst; |
||
| 68 | |||
| 69 | va_copy(atst, args); |
||
| 70 | spinlock_lock(&klog_lock); |
||
| 71 | |||
| 72 | ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst); |
||
| 1613 | palkovsky | 73 | if (ret >= klogsize-klogpos) { |
| 1595 | palkovsky | 74 | klogpos = 0; |
| 1613 | palkovsky | 75 | if (ret >= klogsize) |
| 1595 | palkovsky | 76 | goto out; |
| 77 | } |
||
| 78 | ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret); |
||
| 79 | klogpos += ret; |
||
| 80 | if (klogpos >= klogsize) |
||
| 81 | klogpos = 0; |
||
| 82 | out: |
||
| 83 | spinlock_unlock(&klog_lock); |
||
| 84 | va_end(atst); |
||
| 85 | } |
||
| 86 | |||
| 87 | /** Printf a message to kernel-uspace log */ |
||
| 88 | void klog_printf(const char *fmt, ...) |
||
| 89 | { |
||
| 90 | va_list args; |
||
| 91 | |||
| 92 | va_start(args, fmt); |
||
| 93 | |||
| 94 | klog_vprintf(fmt, args); |
||
| 95 | |||
| 96 | va_end(args); |
||
| 97 | } |