bac6068857
- current and maximum priority per process; - quantum size and current ticks left per process; - max number of full quantums in a row allow (otherwise current priority is decremented)
109 lines
4.8 KiB
C
Executable file
109 lines
4.8 KiB
C
Executable file
/* The object file of "table.c" contains most kernel data. Variables that
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* are declared in the *.h files appear with EXTERN in front of them, as in
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*
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* EXTERN int x;
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*
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* Normally EXTERN is defined as extern, so when they are included in another
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* file, no storage is allocated. If EXTERN were not present, but just say,
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*
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* int x;
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*
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* then including this file in several source files would cause 'x' to be
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* declared several times. While some linkers accept this, others do not,
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* so they are declared extern when included normally. However, it must be
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* declared for real somewhere. That is done here, by redefining EXTERN as
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* the null string, so that inclusion of all *.h files in table.c actually
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* generates storage for them.
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*
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* Various variables could not be declared EXTERN, but are declared PUBLIC
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* or PRIVATE. The reason for this is that extern variables cannot have a
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* default initialization. If such variables are shared, they must also be
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* declared in one of the *.h files without the initialization. Examples
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* include 'tasktab' (this file) and 'idt'/'gdt' (protect.c).
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*
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* Changes:
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* Nov 10, 2004 removed controller->driver mappings (Jorrit N. Herder)
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* Oct 17, 2004 updated above and tasktab comments (Jorrit N. Herder)
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* May 01, 2004 included p_sendmask in tasktab (Jorrit N. Herder)
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*/
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#define _TABLE
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#include "kernel.h"
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#include "proc.h"
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#include "ipc.h"
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#include "sendmask.h"
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#include <minix/com.h>
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#include <ibm/int86.h>
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/* Define stack sizes for all tasks included in the system image. */
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#define NO_STACK 0
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#define SMALL_STACK (128 * sizeof(char *))
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#if (CHIP == INTEL) /* 3 intr, 3 temps, 4 db */
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#define IDLE_S ((3+3+4) * sizeof(char *))
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#else
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#define IDLE_S SMALL_STACK
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#endif
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#define HARDWARE_S NO_STACK /* dummy task, uses kernel stack */
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#define SYSTEM_S SMALL_STACK
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#define CLOCK_S SMALL_STACK
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/* Stack space for all the task stacks. Declared as (char *) to align it. */
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#define TOT_STACK_SPACE (IDLE_S+HARDWARE_S+CLOCK_S+SYSTEM_S)
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PUBLIC char *t_stack[TOT_STACK_SPACE / sizeof(char *)];
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/* The system image table lists all programs that are part of the boot image.
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* The order of the entries here MUST agree with the order of the programs
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* in the boot image and all kernel tasks must come first.
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* Each entry provides the process number, type, scheduling priority, send
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* mask, and a name for the process table. For kernel processes, the startup
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* routine and stack size is also provided.
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*/
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#define IDLE_F (PREEMPTIBLE | BILLABLE)
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#define USER_F (PREEMPTIBLE | SCHED_Q_HEAD)
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#define SYS_F (PREEMPTIBLE)
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#define IDLE_T 32 /* ticks */
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#define USER_T 8 /* ticks */
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#define SYS_T 16 /* ticks */
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PUBLIC struct system_image image[] = {
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{ IDLE, idle_task, IDLE_F, IDLE_T, IDLE_Q, IDLE_S, EMPTY_CALL_MASK, DENY_ALL_MASK, "IDLE" },
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{ CLOCK, clock_task, 0, SYS_T, TASK_Q, CLOCK_S, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "CLOCK" },
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{ SYSTASK, sys_task, 0, SYS_T, TASK_Q, SYSTEM_S, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "SYS" },
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{ HARDWARE, 0, 0, SYS_T, TASK_Q, HARDWARE_S, EMPTY_CALL_MASK, ALLOW_ALL_MASK,"HARDW." },
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{ PM_PROC_NR, 0, 0, SYS_T, 3, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "PM" },
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{ FS_PROC_NR, 0, 0, SYS_T, 3, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "FS" },
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{ IS_PROC_NR, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "IS" },
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{ TTY, 0, SYS_F, SYS_T, 1, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "TTY" },
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{ MEMORY, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "MEMORY" },
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#if ENABLE_AT_WINI
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{ AT_WINI, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "AT_WINI" },
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#endif
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#if ENABLE_FLOPPY
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{ FLOPPY, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "FLOPPY" },
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#endif
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#if ENABLE_PRINTER
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{ PRINTER, 0, SYS_F, SYS_T, 3, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "PRINTER" },
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#endif
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#if ENABLE_RTL8139
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{ USR8139, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "RTL8139" },
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#endif
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#if ENABLE_FXP
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{ FXP, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "FXP" },
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#endif
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#if ENABLE_DPETH
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{ DPETH, 0, SYS_F, SYS_T, 2, 0, SYSTEM_CALL_MASK, ALLOW_ALL_MASK, "DPETH" },
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#endif
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{ INIT_PROC_NR, 0, USER_F, USER_T, USER_Q, 0, USER_CALL_MASK, USER_PROC_SENDMASK, "INIT" },
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};
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/* Verify the size of the system image table at compile time. If the number
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* is not correct, the size of the 'dummy' array will be negative, causing
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* a compile time error. Note that no space is allocated because 'dummy' is
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* declared extern.
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*/
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extern int dummy[(IMAGE_SIZE==sizeof(image)/sizeof(struct system_image))?1:-1];
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