static int rtc_start_timer(struct qemu_alarm_timer *t) { int rtc_fd; unsigned long current_rtc_freq = 0; TFR(rtc_fd = open("/dev/rtc", O_RDONLY)); if (rtc_fd < 0) return -1; ioctl(rtc_fd, RTC_IRQP_READ, &current_rtc_freq); if (current_rtc_freq != RTC_FREQ && ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) { fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n" "error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n" "type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n"); goto fail; } if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) { fail: close(rtc_fd); return -1; } enable_sigio_timer(rtc_fd); t->priv = (void *)(long)rtc_fd; return 0; }
static int rtc_start_timer(struct qemu_alarm_timer *t) { int rtc_fd; unsigned long current_rtc_freq = 0; TFR(rtc_fd = open("/dev/rtc", O_RDONLY)); if (rtc_fd < 0) return -1; ioctl(rtc_fd, RTC_IRQP_READ, &current_rtc_freq); if (current_rtc_freq != RTC_FREQ && ioctl(rtc_fd, RTC_IRQP_SET, RTC_FREQ) < 0) { fprintf(stderr, "Could not configure '/dev/rtc' to have a 1024 Hz timer. This is not a fatal\n" "error, but for better emulation accuracy either use a 2.6 host Linux kernel or\n" "type 'echo 1024 > /proc/sys/dev/rtc/max-user-freq' as root.\n"); goto fail; } if (ioctl(rtc_fd, RTC_PIE_ON, 0) < 0) { fail: close(rtc_fd); return -1; } enable_sigio_timer(rtc_fd); t->priv = (void *)(long)rtc_fd; return 0; }