mirror of
https://github.com/clearlinux/kvmtool.git
synced 2026-10-17 05:40:55 +00:00
Sasha Levin
809f088b1d
Remove some redundant members between struct kvm_config and struct kvm since options are now contained within struct kvm. Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
138 lines
2.7 KiB
C
138 lines
2.7 KiB
C
#include "kvm/rtc.h"
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#include "kvm/ioport.h"
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#include "kvm/kvm.h"
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#include <time.h>
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/*
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* MC146818 RTC registers
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*/
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#define RTC_SECONDS 0x00
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#define RTC_SECONDS_ALARM 0x01
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#define RTC_MINUTES 0x02
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#define RTC_MINUTES_ALARM 0x03
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#define RTC_HOURS 0x04
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#define RTC_HOURS_ALARM 0x05
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#define RTC_DAY_OF_WEEK 0x06
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#define RTC_DAY_OF_MONTH 0x07
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#define RTC_MONTH 0x08
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#define RTC_YEAR 0x09
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#define RTC_REG_A 0x0A
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#define RTC_REG_B 0x0B
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#define RTC_REG_C 0x0C
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#define RTC_REG_D 0x0D
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struct rtc_device {
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u8 cmos_idx;
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u8 cmos_data[128];
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};
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static struct rtc_device rtc;
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static inline unsigned char bin2bcd(unsigned val)
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{
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return ((val / 10) << 4) + val % 10;
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}
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static bool cmos_ram_data_in(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size)
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{
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struct tm *tm;
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time_t ti;
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time(&ti);
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tm = gmtime(&ti);
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switch (rtc.cmos_idx) {
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case RTC_SECONDS:
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ioport__write8(data, bin2bcd(tm->tm_sec));
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break;
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case RTC_MINUTES:
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ioport__write8(data, bin2bcd(tm->tm_min));
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break;
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case RTC_HOURS:
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ioport__write8(data, bin2bcd(tm->tm_hour));
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break;
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case RTC_DAY_OF_WEEK:
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ioport__write8(data, bin2bcd(tm->tm_wday + 1));
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break;
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case RTC_DAY_OF_MONTH:
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ioport__write8(data, bin2bcd(tm->tm_mday));
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break;
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case RTC_MONTH:
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ioport__write8(data, bin2bcd(tm->tm_mon + 1));
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break;
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case RTC_YEAR:
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ioport__write8(data, bin2bcd(tm->tm_year));
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break;
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default:
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ioport__write8(data, rtc.cmos_data[rtc.cmos_idx]);
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break;
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}
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return true;
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}
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static bool cmos_ram_data_out(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size)
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{
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switch (rtc.cmos_idx) {
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case RTC_REG_C:
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case RTC_REG_D:
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/* Read-only */
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break;
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default:
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rtc.cmos_data[rtc.cmos_idx] = ioport__read8(data);
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break;
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}
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return true;
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}
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static struct ioport_operations cmos_ram_data_ioport_ops = {
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.io_out = cmos_ram_data_out,
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.io_in = cmos_ram_data_in,
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};
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static bool cmos_ram_index_out(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size)
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{
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u8 value = ioport__read8(data);
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kvm->nmi_disabled = value & (1UL << 7);
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rtc.cmos_idx = value & ~(1UL << 7);
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return true;
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}
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static struct ioport_operations cmos_ram_index_ioport_ops = {
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.io_out = cmos_ram_index_out,
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};
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int rtc__init(struct kvm *kvm)
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{
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int r = 0;
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/* PORT 0070-007F - CMOS RAM/RTC (REAL TIME CLOCK) */
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r = ioport__register(0x0070, &cmos_ram_index_ioport_ops, 1, NULL);
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if (r < 0)
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return r;
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r = ioport__register(0x0071, &cmos_ram_data_ioport_ops, 1, NULL);
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if (r < 0) {
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ioport__unregister(0x0071);
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return r;
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}
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return r;
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}
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int rtc__exit(struct kvm *kvm)
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{
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/* PORT 0070-007F - CMOS RAM/RTC (REAL TIME CLOCK) */
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ioport__unregister(0x0070);
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ioport__unregister(0x0071);
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return 0;
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}
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