diff options
Diffstat (limited to 'c/src/exec/sapi/include/rtems/io.h')
| -rw-r--r-- | c/src/exec/sapi/include/rtems/io.h | 56 |
1 files changed, 44 insertions, 12 deletions
diff --git a/c/src/exec/sapi/include/rtems/io.h b/c/src/exec/sapi/include/rtems/io.h index ef9fc69d03..6f3afba53e 100644 --- a/c/src/exec/sapi/include/rtems/io.h +++ b/c/src/exec/sapi/include/rtems/io.h @@ -32,16 +32,40 @@ extern "C" { #endif -#include <rtems/config.h> +#include <rtems/rtems/status.h> /* - * The following declare the data required to manage the Device Driver - * Address Table. + * + * The following defines the types for: + * + * + major and minor numbers + * + the return type of a device driver entry + * + a pointer to a device driver entry + * + an entry in the the Device Driver Address Table. Each entry in this + * table corresponds to an application provided device driver and + * defines the entry points for that device driver. */ + +typedef unsigned32 rtems_device_major_number; +typedef unsigned32 rtems_device_minor_number; + +typedef rtems_status_code rtems_device_driver; + +typedef rtems_device_driver ( *rtems_device_driver_entry )( + rtems_device_major_number, + rtems_device_minor_number, + void * + ); -EXTERN unsigned32 _IO_Number_of_drivers; -EXTERN rtems_driver_address_table *_IO_Driver_address_table; - +typedef struct { + rtems_device_driver_entry initialization; /* initialization procedure */ + rtems_device_driver_entry open; /* open request procedure */ + rtems_device_driver_entry close; /* close request procedure */ + rtems_device_driver_entry read; /* read request procedure */ + rtems_device_driver_entry write; /* write request procedure */ + rtems_device_driver_entry control; /* special functions procedure */ +} rtems_driver_address_table; + /* * Table for the io device names */ @@ -53,12 +77,19 @@ typedef struct { rtems_device_minor_number minor; } rtems_driver_name_t; -/*XXX this really should be allocated some better way... */ -/*XXX it should probably be a chain and use a 'maximum' drivers field - * in config table */ -#define RTEMS_MAX_DRIVER_NAMES 20 -EXTERN rtems_driver_name_t rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; +/* + * This is the table of device names. + */ + +/* + * The following declare the data required to manage the Driver + * Address Table and Device Name Table. + */ +EXTERN unsigned32 _IO_Number_of_drivers; +EXTERN rtems_driver_address_table *_IO_Driver_address_table; +EXTERN unsigned32 _IO_Number_of_devices; +EXTERN rtems_driver_name_t *_IO_Driver_name_table; /* * _IO_Manager_initialization @@ -70,7 +101,8 @@ EXTERN rtems_driver_name_t rtems_driver_name_table[RTEMS_MAX_DRIVER_NAMES]; STATIC INLINE void _IO_Manager_initialization( rtems_driver_address_table *driver_table, - unsigned32 number_of_drivers + unsigned32 number_of_drivers, + unsigned32 number_of_devices ); /* |