103 lines
4.5 KiB
C
103 lines
4.5 KiB
C
/* 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 'boot_image' (this file) and 'idt' and 'gdt' (protect.c).
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*
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* Changes:
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* Nov 22, 2009 rewrite of privilege management (Cristiano Giuffrida)
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* Aug 02, 2005 set privileges and minimal boot image (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 changed struct for system image (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 <minix/com.h>
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/* Define stack sizes for the kernel tasks included in the system image. */
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#define NO_STACK 0
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#define SMALL_STACK (1024 * sizeof(char *))
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#define IDL_S SMALL_STACK /* 3 intr, 3 temps, 4 db for Intel */
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#define HRD_S NO_STACK /* dummy task, uses kernel stack */
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#define TSK_S SMALL_STACK /* system and clock task */
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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 (IDL_S + HRD_S + (2 * TSK_S))
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PUBLIC char *t_stack[TOT_STACK_SPACE / sizeof(char *)];
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/* Define boot process flags. */
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#define BVM_F (PROC_FULLVM) /* boot processes with VM */
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#define OVM_F (PERF_SYS_CORE_FULLVM ? PROC_FULLVM : 0) /* critical boot
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* processes with
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* optional VM.
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*/
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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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* The order of the entries here matches the priority NOTIFY messages are
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* delivered to a given process. NOTIFY messages are always delivered with
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* the highest priority. DS must be the first system process in the list to
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* allow reliable asynchronous publishing of system events. RS comes right after
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* to prioritize ping messages periodically delivered to system processes.
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*
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* Each entry provides the process number, flags, quantum size, scheduling
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* queue, and a name for the process table. The initial program counter and
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* stack size is also provided for kernel tasks.
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*
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* Note: the quantum size must be positive in all cases!
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*/
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PUBLIC struct boot_image image[] = {
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/* process nr, flags, stack, name */
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{IDLE, 0, IDL_S, "idle" },
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{CLOCK, 0, IDL_S, "clock" },
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{SYSTEM, 0, IDL_S, "system"},
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{HARDWARE, 0, HRD_S, "kernel"},
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{DS_PROC_NR, BVM_F, 0, "ds" },
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{RS_PROC_NR, 0, 0, "rs" },
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{PM_PROC_NR, OVM_F, 0, "pm" },
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{SCHED_PROC_NR,OVM_F, 0, "sched" },
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{VFS_PROC_NR, OVM_F, 0, "vfs" },
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{MEM_PROC_NR, BVM_F, 0, "memory"},
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{LOG_PROC_NR, BVM_F, 0, "log" },
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{TTY_PROC_NR, BVM_F, 0, "tty" },
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{MFS_PROC_NR, BVM_F, 0, "mfs" },
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{VM_PROC_NR, 0, 0, "vm" },
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{PFS_PROC_NR, BVM_F, 0, "pfs" },
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{INIT_PROC_NR, BVM_F, 0, "init" },
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};
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/* Verify the size of the system image table at compile time. Also verify that
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* the first chunk of the ipc mask has enough bits to accommodate the processes
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* in the image.
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* If a problem is detected, the size of the 'dummy' array will be negative,
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* causing a compile time error. Note that no space is actually allocated
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* because 'dummy' is declared extern.
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*/
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extern int dummy[(NR_BOOT_PROCS==sizeof(image)/
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sizeof(struct boot_image))?1:-1];
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extern int dummy[(BITCHUNK_BITS > NR_BOOT_PROCS - 1) ? 1 : -1];
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