diff options
Diffstat (limited to 'dev/uart8250.hh')
| -rw-r--r-- | dev/uart8250.hh | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/dev/uart8250.hh b/dev/uart8250.hh index e85ad72c8..b4c660021 100644 --- a/dev/uart8250.hh +++ b/dev/uart8250.hh @@ -38,8 +38,19 @@ #include "dev/io_device.hh" #include "dev/uart.hh" + +/* UART8250 Interrupt ID Register + * bit 0 Interrupt Pending 0 = true, 1 = false + * bit 2:1 ID of highest priority interrupt + * bit 7:3 zeroes + */ #define IIR_NOPEND 0x1 -#define IIR_RXID 0x4 + +// Interrupt IDs +#define IIR_MODEM 0x00 /* Modem Status (lowest priority) */ +#define IIR_TXID 0x02 /* Tx Data */ +#define IIR_RXID 0x04 /* Rx Data */ +#define IIR_LINE 0x06 /* Rx Line Status (highest priority)*/ class SimConsole; class Platform; |