fe0dcb5c00
TTY: select and revive with new notify and FS call back; kernel: removed old notify code; removed ugly prepare_shutdown timer kputc: don't send to FS if PRINTF_PROC fails
58 lines
2.5 KiB
C
58 lines
2.5 KiB
C
#ifndef IPC_H
|
|
#define IPC_H
|
|
|
|
#include <minix/com.h>
|
|
|
|
/* Masks and flags for system calls. */
|
|
#define SYSCALL_FUNC 0x0F /* mask for system call function */
|
|
#define SYSCALL_FLAGS 0xF0 /* mask for system call flags */
|
|
#define NON_BLOCKING 0x10 /* prevent blocking, return error */
|
|
#define FRESH_ANSWER 0x20 /* ignore pending notifications as answer */
|
|
/* (default behaviour for SENDREC calls) */
|
|
|
|
/* System call numbers that are passed when trapping to the kernel. The
|
|
* numbers are carefully defined so that it can easily be seen (based on
|
|
* the bits that are on) which checks should be done in sys_call().
|
|
*/
|
|
#define SEND 1 /* 0 0 0 1 : blocking send */
|
|
#define RECEIVE 2 /* 0 0 1 0 : blocking receive */
|
|
#define SENDREC 3 /* 0 0 1 1 : SEND + RECEIVE */
|
|
#define NOTIFY 4 /* 0 1 0 0 : nonblocking notify */
|
|
#define ECHO 8 /* 1 0 0 0 : echo a message */
|
|
|
|
/* The following bit masks determine what checks that should be done. */
|
|
#define CHECK_PTR 0x0B /* 1 0 1 1 : validate message buffer */
|
|
#define CHECK_DST 0x05 /* 0 1 0 1 : validate message destination */
|
|
#define CHECK_SRC 0x02 /* 0 0 1 0 : validate message source */
|
|
|
|
/* Call masks indicating which system calls (traps) a process can make.
|
|
* System processes can do anything; user processes are highly restricted.
|
|
*/
|
|
#define EMPTY_MASK (0)
|
|
#define FILLED_MASK (~0)
|
|
#define USER_CALL_MASK ((1 << SENDREC) | (1 << ECHO))
|
|
|
|
/* Send masks determine to whom processes can send messages or notifications.
|
|
* The values here are used for the processes in the boot image. We rely on
|
|
* the initialization code in main() to match the s_nr_to_id() mapping for the
|
|
* processes in the boot image, so that the send mask that is defined here
|
|
* can be directly copied onto map[0] of the actual send mask. Privilege
|
|
* structure 0 is shared by user processes.
|
|
*
|
|
* Note that process numbers in the boot image should not be higher than
|
|
* "BITCHUNK_BITS - NR_TASKS", because a bitchunk_t field is used to store
|
|
* the send masks in the table that describes that processes in the image.
|
|
*/
|
|
#define s_nr_to_id(n) (NR_TASKS + (n) + 1)
|
|
#define s(n) (1 << s_nr_to_id(n))
|
|
#define USER_SEND_MASK (s(PM_PROC_NR) | s(FS_PROC_NR))
|
|
#define DRIVER_SEND_MASK (s(PM_PROC_NR) | s(FS_PROC_NR) | s(SYSTEM) | \
|
|
s(CLOCK) | s(PRINTF_PROC) | s(TTY))
|
|
#define SERVER_SEND_MASK (~0)
|
|
#define SYSTEM_SEND_MASK (~1)
|
|
|
|
/* Sanity check to make sure the send masks can be set. */
|
|
extern int dummy[(BITCHUNK_BITS-NR_TASKS > INIT_PROC_NR) ? 1 : -1];
|
|
|
|
#endif /* IPC_H */
|