| #ifndef _BITS_NS16550_H |
| #define _BITS_NS16550_H |
| |
| /** @file |
| * |
| * 16550-compatible UART |
| * |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); |
| |
| #include <stdint.h> |
| #include <ipxe/io.h> |
| |
| /** |
| * Write to UART register |
| * |
| * @v ns16550 16550 UART |
| * @v address Register address |
| * @v data Data |
| */ |
| static inline __attribute__ (( always_inline )) void |
| ns16550_write ( struct ns16550_uart *ns16550, unsigned int address, |
| uint8_t data ) { |
| |
| iowrite8 ( data, ( ns16550->base + address ) ); |
| } |
| |
| /** |
| * Read from UART register |
| * |
| * @v ns16550 16550 UART |
| * @v address Register address |
| * @ret data Data |
| */ |
| static inline __attribute__ (( always_inline )) uint8_t |
| ns16550_read ( struct ns16550_uart *ns16550, unsigned int address ) { |
| |
| return ioread8 ( ns16550->base + address ); |
| } |
| |
| /* Fixed ISA serial port base addresses */ |
| #define COM1_BASE 0x3f8 |
| #define COM2_BASE 0x2f8 |
| #define COM3_BASE 0x3e8 |
| #define COM4_BASE 0x2e8 |
| |
| /* Fixed ISA serial ports */ |
| extern struct uart com1; |
| extern struct uart com2; |
| extern struct uart com3; |
| extern struct uart com4; |
| |
| /* Fixed ISA serial port names */ |
| #define COM1 &com1 |
| #define COM2 &com2 |
| #define COM3 &com3 |
| #define COM4 &com4 |
| |
| #endif /* _BITS_NS16550_H */ |
