| 0,0 → 1,102 |
|---|
| /* |
| * Copyright (C) 2006 Ondrej Palkovsky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <mm/frame.h> |
| #include <sysinfo/sysinfo.h> |
| #include <console/klog.h> |
| #include <print.h> |
| #include <ipc/irq.h> |
| |
| /* Order of frame to be allocated for klog communication */ |
| #define KLOG_ORDER 0 |
| |
| static char *klog; |
| static int klogsize; |
| static int klogpos; |
| |
| SPINLOCK_INITIALIZE(klog_lock); |
| |
| /** Initialize kernel loggin facility |
| * |
| * Allocate pages that are to be shared if uspace for console data |
| */ |
| void klog_init(void) |
| { |
| void *faddr; |
| |
| faddr = (void *)PFN2ADDR(frame_alloc(KLOG_ORDER, FRAME_ATOMIC)); |
| if (!faddr) |
| panic("Cannot allocate page for klog"); |
| klog = (char *)PA2KA(faddr); |
| |
| sysinfo_set_item_val("klog.faddr", NULL, (__native)faddr); |
| sysinfo_set_item_val("klog.pages", NULL, 1 << KLOG_ORDER); |
| |
| klogsize = PAGE_SIZE << KLOG_ORDER; |
| klogpos = 0; |
| } |
| |
| static void klog_vprintf(const char *fmt, va_list args) |
| { |
| int ret; |
| va_list atst; |
| |
| va_copy(atst, args); |
| spinlock_lock(&klog_lock); |
| |
| ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, atst); |
| // Workaround around bad return value from vsnprintf |
| if (ret+klogpos < klogsize) |
| ret = 100; |
| if (ret == klogsize-klogpos) { |
| klogpos = 0; |
| ret = vsnprintf(klog+klogpos, klogsize-klogpos, fmt, args); |
| ret = 100; |
| if (ret == klogsize) |
| goto out; |
| } |
| ipc_irq_send_msg(IPC_IRQ_KLOG, klogpos, ret); |
| klogpos += ret; |
| if (klogpos >= klogsize) |
| klogpos = 0; |
| out: |
| spinlock_unlock(&klog_lock); |
| va_end(atst); |
| } |
| |
| /** Printf a message to kernel-uspace log */ |
| void klog_printf(const char *fmt, ...) |
| { |
| va_list args; |
| |
| va_start(args, fmt); |
| |
| klog_vprintf(fmt, args); |
| |
| va_end(args); |
| } |