| 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 | /** @addtogroup genericklog
|
|---|
| 30 | * @{
|
|---|
| 31 | */
|
|---|
| 32 | /** @file
|
|---|
| 33 | */
|
|---|
| 34 |
|
|---|
| 35 | #include <mm/frame.h>
|
|---|
| 36 | #include <sysinfo/sysinfo.h>
|
|---|
| 37 | #include <console/klog.h>
|
|---|
| 38 | #include <print.h>
|
|---|
| 39 | #include <ipc/irq.h>
|
|---|
| 40 |
|
|---|
| 41 | /* Order of frame to be allocated for klog communication */
|
|---|
| 42 | #define KLOG_ORDER 0
|
|---|
| 43 |
|
|---|
| 44 | static char *klog;
|
|---|
| 45 | static int klogsize;
|
|---|
| 46 | static int klogpos;
|
|---|
| 47 |
|
|---|
| 48 | SPINLOCK_INITIALIZE(klog_lock);
|
|---|
| 49 |
|
|---|
| 50 | /** Initialize kernel logging facility
|
|---|
| 51 | *
|
|---|
| 52 | * Allocate pages that are to be shared with uspace for console data.
|
|---|
| 53 | * The shared area is a circular buffer. Userspace application may
|
|---|
| 54 | * be notified on new data with indication of position and size
|
|---|
| 55 | * of the data within the circular buffer.
|
|---|
| 56 | */
|
|---|
| 57 | void klog_init(void)
|
|---|
| 58 | {
|
|---|
| 59 | void *faddr;
|
|---|
| 60 |
|
|---|
| 61 | faddr = frame_alloc(KLOG_ORDER, FRAME_ATOMIC);
|
|---|
| 62 | if (!faddr)
|
|---|
| 63 | panic("Cannot allocate page for klog");
|
|---|
| 64 | klog = (char *)PA2KA(faddr);
|
|---|
| 65 |
|
|---|
| 66 | sysinfo_set_item_val("klog.faddr", NULL, (unative_t)faddr);
|
|---|
| 67 | sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER);
|
|---|
| 68 |
|
|---|
| 69 | klogsize = PAGE_SIZE << KLOG_ORDER;
|
|---|
| 70 | klogpos = 0;
|
|---|
| 71 | }
|
|---|
| 72 |
|
|---|
| 73 | static void klog_vprintf(const char *fmt, va_list args)
|
|---|
| 74 | {
|
|---|
| 75 | int ret;
|
|---|
| 76 | va_list atst;
|
|---|
| 77 |
|
|---|
| 78 | va_copy(atst, args);
|
|---|
| 79 | spinlock_lock(&klog_lock);
|
|---|
| 80 |
|
|---|
| 81 | ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst);
|
|---|
| 82 | if (ret >= klogsize-klogpos) {
|
|---|
| 83 | klogpos = 0;
|
|---|
| 84 | if (ret >= klogsize)
|
|---|
| 85 | goto out;
|
|---|
| 86 | }
|
|---|
| 87 | ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret, 0);
|
|---|
| 88 | klogpos += ret;
|
|---|
| 89 | if (klogpos >= klogsize)
|
|---|
| 90 | klogpos = 0;
|
|---|
| 91 | out:
|
|---|
| 92 | spinlock_unlock(&klog_lock);
|
|---|
| 93 | va_end(atst);
|
|---|
| 94 | }
|
|---|
| 95 |
|
|---|
| 96 | /** Printf a message to kernel-uspace log */
|
|---|
| 97 | void klog_printf(const char *fmt, ...)
|
|---|
| 98 | {
|
|---|
| 99 | va_list args;
|
|---|
| 100 |
|
|---|
| 101 | va_start(args, fmt);
|
|---|
| 102 |
|
|---|
| 103 | klog_vprintf(fmt, args);
|
|---|
| 104 |
|
|---|
| 105 | va_end(args);
|
|---|
| 106 | }
|
|---|
| 107 |
|
|---|
| 108 | /** @}
|
|---|
| 109 | */
|
|---|
| 110 |
|
|---|
