diff options
Diffstat (limited to 'roms/seabios/src/hw/rtc.h')
| -rw-r--r-- | roms/seabios/src/hw/rtc.h | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/roms/seabios/src/hw/rtc.h b/roms/seabios/src/hw/rtc.h new file mode 100644 index 000000000..252e73a41 --- /dev/null +++ b/roms/seabios/src/hw/rtc.h @@ -0,0 +1,75 @@ +#ifndef __RTC_H +#define __RTC_H + +#define PORT_CMOS_INDEX 0x0070 +#define PORT_CMOS_DATA 0x0071 + +// PORT_CMOS_INDEX nmi disable bit +#define NMI_DISABLE_BIT 0x80 + +// Standard BIOS RTC chip entries +#define CMOS_RTC_SECONDS 0x00 +#define CMOS_RTC_SECONDS_ALARM 0x01 +#define CMOS_RTC_MINUTES 0x02 +#define CMOS_RTC_MINUTES_ALARM 0x03 +#define CMOS_RTC_HOURS 0x04 +#define CMOS_RTC_HOURS_ALARM 0x05 +#define CMOS_RTC_DAY_WEEK 0x06 +#define CMOS_RTC_DAY_MONTH 0x07 +#define CMOS_RTC_MONTH 0x08 +#define CMOS_RTC_YEAR 0x09 +#define CMOS_STATUS_A 0x0a +#define CMOS_STATUS_B 0x0b +#define CMOS_STATUS_C 0x0c +#define CMOS_STATUS_D 0x0d +#define CMOS_RESET_CODE 0x0f + +// QEMU cmos config fields. DO NOT ADD MORE. (All new content should +// be passed via the fw_cfg "file" interface.) +#define CMOS_FLOPPY_DRIVE_TYPE 0x10 +#define CMOS_DISK_DATA 0x12 +#define CMOS_EQUIPMENT_INFO 0x14 +#define CMOS_DISK_DRIVE1_TYPE 0x19 +#define CMOS_DISK_DRIVE2_TYPE 0x1a +#define CMOS_DISK_DRIVE1_CYL 0x1b +#define CMOS_DISK_DRIVE2_CYL 0x24 +#define CMOS_MEM_EXTMEM_LOW 0x30 +#define CMOS_MEM_EXTMEM_HIGH 0x31 +#define CMOS_CENTURY 0x32 +#define CMOS_MEM_EXTMEM2_LOW 0x34 +#define CMOS_MEM_EXTMEM2_HIGH 0x35 +#define CMOS_BIOS_BOOTFLAG1 0x38 +#define CMOS_BIOS_DISKTRANSFLAG 0x39 +#define CMOS_BIOS_BOOTFLAG2 0x3d +#define CMOS_MEM_HIGHMEM_LOW 0x5b +#define CMOS_MEM_HIGHMEM_MID 0x5c +#define CMOS_MEM_HIGHMEM_HIGH 0x5d +#define CMOS_BIOS_SMP_COUNT 0x5f + +// RTC register flags +#define RTC_A_UIP 0x80 + +#define RTC_B_SET 0x80 +#define RTC_B_PIE 0x40 +#define RTC_B_AIE 0x20 +#define RTC_B_UIE 0x10 +#define RTC_B_BIN 0x04 +#define RTC_B_24HR 0x02 +#define RTC_B_DSE 0x01 + +#ifndef __ASSEMBLY__ + +#include "types.h" // u8 + +// rtc.c +u8 rtc_read(u8 index); +void rtc_write(u8 index, u8 val); +void rtc_mask(u8 index, u8 off, u8 on); +int rtc_updating(void); +void rtc_setup(void); +void rtc_use(void); +void rtc_release(void); + +#endif // !__ASSEMBLY__ + +#endif // rtc.h |