100 lines
2.5 KiB
C
100 lines
2.5 KiB
C
/* This file contains a collection of miscellaneous procedures:
|
|
* panic: abort MINIX due to a fatal error
|
|
* kputc: buffered putc used by kernel printf
|
|
*/
|
|
|
|
#include "kernel.h"
|
|
#include "proc.h"
|
|
#include "arch_proto.h"
|
|
|
|
#include <minix/syslib.h>
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <signal.h>
|
|
#include <string.h>
|
|
|
|
#include <minix/sys_config.h>
|
|
|
|
#define ARE_PANICING 0xDEADC0FF
|
|
|
|
/*===========================================================================*
|
|
* panic *
|
|
*===========================================================================*/
|
|
void panic(const char *fmt, ...)
|
|
{
|
|
va_list arg;
|
|
/* The system has run aground of a fatal kernel error. Terminate execution. */
|
|
if (minix_panicing == ARE_PANICING) {
|
|
reset();
|
|
}
|
|
minix_panicing = ARE_PANICING;
|
|
if (fmt != NULL) {
|
|
printf("kernel panic: ");
|
|
va_start(arg, fmt);
|
|
vprintf(fmt, arg);
|
|
printf("\n");
|
|
}
|
|
|
|
printf("kernel on CPU %d: ", cpuid);
|
|
util_stacktrace();
|
|
|
|
printf("current process : ");
|
|
proc_stacktrace(get_cpulocal_var(proc_ptr));
|
|
|
|
/* Abort MINIX. */
|
|
minix_shutdown(NULL);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* kputc *
|
|
*===========================================================================*/
|
|
void kputc(c)
|
|
int c; /* character to append */
|
|
{
|
|
/* Accumulate a single character for a kernel message. Send a notification
|
|
* to the output driver if an END_OF_KMESS is encountered.
|
|
*/
|
|
if (c != END_OF_KMESS) {
|
|
static int blpos = 0;
|
|
int maxblpos = sizeof(kmess_buf) - 2;
|
|
#ifdef DEBUG_SERIAL
|
|
if (do_serial_debug) {
|
|
if(c == '\n')
|
|
ser_putc('\r');
|
|
ser_putc(c);
|
|
}
|
|
#endif
|
|
kmess.km_buf[kmess.km_next] = c; /* put normal char in buffer */
|
|
kmess_buf[blpos] = c;
|
|
if (kmess.km_size < sizeof(kmess.km_buf))
|
|
kmess.km_size += 1;
|
|
kmess.km_next = (kmess.km_next + 1) % _KMESS_BUF_SIZE;
|
|
if(blpos == maxblpos) {
|
|
memmove(kmess_buf, kmess_buf+1, sizeof(kmess_buf)-1);
|
|
} else blpos++;
|
|
} else {
|
|
int p;
|
|
endpoint_t outprocs[] = OUTPUT_PROCS_ARRAY;
|
|
if(!(minix_panicing || do_serial_debug)) {
|
|
for(p = 0; outprocs[p] != NONE; p++) {
|
|
if(isokprocn(outprocs[p]) && !isemptyn(outprocs[p])) {
|
|
send_sig(outprocs[p], SIGKMESS);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
|
|
void cpu_print_freq(unsigned cpu)
|
|
{
|
|
u64_t freq;
|
|
|
|
freq = cpu_get_freq(cpu);
|
|
printf("CPU %d freq %lu MHz\n", cpu, div64u(freq, 1000000));
|
|
}
|
|
|
|
int is_fpu(void)
|
|
{
|
|
return get_cpulocal_var(fpu_presence);
|
|
}
|