169 lines
5.4 KiB
C
169 lines
5.4 KiB
C
/* Definition of the 'p_sendmask' bit mask used in the process table. The bit
|
|
* mask of process is checked in mini_send() to see if the caller is allowed
|
|
* to send to the destination. The bit masks accomodate bits for NR_TASKS +
|
|
* (LOW_USER+1) + 1. This means that there are bits for each task, driver, and
|
|
* server process, INIT, and one bit to represent all ordinary user processes.
|
|
*
|
|
* NOTE: the send masks definitions must be updated!!!
|
|
*
|
|
* Changes:
|
|
* May 01, 2004 created and sendmask definitions (Jorrit N. Herder)
|
|
*/
|
|
|
|
#ifndef SENDMASK_H
|
|
#define SENDMASK_H
|
|
|
|
/* Define type for sendmask, if not already done. */
|
|
#include "type.h"
|
|
|
|
/* Constants to support the bitmask operations. */
|
|
#define BIT_0 (send_mask_t) 1
|
|
#define MASK_ENTRIES NR_TASKS + (LOW_USER+1) + 1
|
|
#define USER_PROC_NR LOW_USER+1 /* used to set bit for user procs */
|
|
#define ALLOW_ALL_MASK (send_mask_t) -1
|
|
#define DENY_ALL_MASK (send_mask_t) 0
|
|
|
|
/* Check if given process number is in range. */
|
|
#define isvalid(n) ((unsigned) ((n)+NR_TASKS) <= MASK_ENTRIES -1)
|
|
|
|
/* Default masks and bit operations that easily allow to construct bit masks.
|
|
* Note the one always must start with a default mask like allow_all_mask.
|
|
* From that point, one can, for example, deny several processes.
|
|
*/
|
|
#define allow_all_mask ALLOW_ALL_MASK
|
|
#define deny_all_mask DENY_ALL_MASK
|
|
#define allow(enabled,n) | (enabled << ((n) + NR_TASKS))
|
|
#define deny(enabled,n) & ~(enabled << ((n) + NR_TASKS))
|
|
#define send_mask_allow(mask,n) ((mask) |= (1 << ((n) + NR_TASKS)))
|
|
#define send_mask_deny(mask,n) ((mask) &= ~(1 << ((n) + NR_TASKS)))
|
|
|
|
/* Check if the bit for the given process number is set. */
|
|
#define isallowed(mask,n) ((mask) & (BIT_0 << ((n) + NR_TASKS)))
|
|
|
|
|
|
/* The masks below match the processes (and order) in src/kernel/table.c.
|
|
* Note that the masks are made effective the inclusion in the task table
|
|
* which is used to set up the process table on start up.
|
|
*/
|
|
|
|
#define TTY_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define DP8390_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define RTL8139_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, USER_PROC_NR) /* inet server starts as user process */ \
|
|
allow(1, TTY) /* need to register function key */ \
|
|
allow(1, SYSTASK) /* need system functionality */ \
|
|
allow(1, CLOCK) /* need clock functionality */
|
|
|
|
#define IDLE_SENDMASK \
|
|
deny_all_mask
|
|
|
|
/* The tasktab in src/kernel/table.c supports up to 4 controllers
|
|
* it is possible to define separate masks for them here, but then
|
|
* a small update in table.c is required to make them effective
|
|
*/
|
|
#define CTRLR_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define SB16DSP_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define SB16MIX_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define FLOPPY_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define CLOCK_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define SYSTEM_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define HARDWARE_SENDMASK \
|
|
allow_all_mask \
|
|
deny(1, USER_PROC_NR)
|
|
|
|
#define PM_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, IS_PROC_NR) /* output diagnostics */ \
|
|
allow(1, SYSTASK) \
|
|
allow(1, TTY) \
|
|
allow(1, CLOCK) \
|
|
allow(1, INIT_PROC_NR) \
|
|
allow(1, FS_PROC_NR) \
|
|
allow(1, USER_PROC_NR) /* reply to system calls */
|
|
|
|
#define AT_SENDMASK \
|
|
allow_all_mask
|
|
|
|
#define FS_SENDMASK \
|
|
allow_all_mask
|
|
#if 0
|
|
deny_all_mask \
|
|
allow(1, IS_PROC_NR) /* output diagnostics */ \
|
|
allow(1, SYSTASK) /* need system functionality */ \
|
|
allow(1, CLOCK) /* need clock functionality */ \
|
|
allow(1, IS_PROC_NR) /* output diagnostics */ \
|
|
allow(1, TTY) /* a.o. observe function keys */ \
|
|
allow(1, FLOPPY) \
|
|
allow(ENABLE_SB16, SB16DSP ) \
|
|
allow(ENABLE_SB16, SB16MIX ) \
|
|
allow(ENABLE_PRINTER, PRINTER ) \
|
|
allow(1, MEMORY ) \
|
|
allow((NR_CTRLRS >= 1), CTRLR(0)) \
|
|
allow((NR_CTRLRS >= 2), CTRLR(1)) \
|
|
allow((NR_CTRLRS >= 3), CTRLR(2)) \
|
|
allow((NR_CTRLRS >= 4), CTRLR(3)) \
|
|
allow(1, INIT_PROC_NR) \
|
|
allow(1, PM_PROC_NR) /* cooperates with process manager */ \
|
|
allow(1, USER_PROC_NR) /* reply to system calls */
|
|
#endif
|
|
|
|
#define IS_SENDMASK \
|
|
allow_all_mask /* IS handles all diagnostic messages */
|
|
#if 0
|
|
deny_all_mask \
|
|
allow(1, CLOCK) /* clock delays and flag alarm needed */ \
|
|
allow(1, FS_PROC_NR) /* open /dev/mem to read CMOS clock */ \
|
|
allow(1, SYSTASK) /* copy tables from kernel space */ \
|
|
allow(1, TTY) /* request function key notifications */ \
|
|
allow(1, USER_PROC_NR) /* reply to system calls */
|
|
#endif
|
|
|
|
#define MEM_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, IS_PROC_NR) /* output diagnostics */ \
|
|
allow(1, SYSTASK) /* system functionality needed */ \
|
|
allow(1, CLOCK) /* check clock alarms */ \
|
|
allow(1, TTY) /* output diagnostics */ \
|
|
allow(1, FS_PROC_NR) /* FS is interface to the driver */
|
|
|
|
#define PRN_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, IS_PROC_NR) /* output diagnostics */ \
|
|
allow(1, SYSTASK) /* device port I/O needed */ \
|
|
allow(1, TTY) /* output diagnostics */ \
|
|
allow(1, CLOCK) /* need small delays */ \
|
|
allow(1, FS_PROC_NR) /* FS is interface to the driver */
|
|
|
|
#define INIT_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, FS_PROC_NR) /* init makes system calls to FS and MM */ \
|
|
allow(1, PM_PROC_NR)
|
|
|
|
#define USER_PROC_SENDMASK \
|
|
deny_all_mask \
|
|
allow(1, FS_PROC_NR) /* users can only make system calls */ \
|
|
allow(1, PM_PROC_NR) \
|
|
allow(1, IS_PROC_NR) \
|
|
allow(ENABLE_TASKSERVER, TS_PROC_NR)
|
|
|
|
|
|
#endif /* SENDMASK_H */
|
|
|