121 lines
5.9 KiB
C
Executable file
121 lines
5.9 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 'boot_image' (this file) and 'idt' and 'gdt' (protect.c).
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*
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* Changes:
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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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#include <ibm/int86.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 (128 * 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 flags for the various process types. */
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#define IDL_F (SYS_PROC | PREEMPTIBLE | BILLABLE) /* idle task */
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#define TSK_F (SYS_PROC) /* kernel tasks */
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#define SRV_F (SYS_PROC | PREEMPTIBLE) /* system services */
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#define USR_F (BILLABLE | PREEMPTIBLE) /* user processes */
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/* Define system call traps for the various process types. These call masks
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* determine what system call traps a process is allowed to make.
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*/
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#define TSK_T (1 << RECEIVE) /* clock and system */
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#define SRV_T (~0) /* system services */
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#define USR_T ((1 << SENDREC) | (1 << ECHO)) /* user processes */
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/* Send masks determine to whom processes can send messages or notifications.
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* The values here are used for the processes in the boot image. We rely on
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* the initialization code in main() to match the s_nr_to_id() mapping for the
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* processes in the boot image, so that the send mask that is defined here
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* can be directly copied onto map[0] of the actual send mask. Privilege
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* structure 0 is shared by user processes.
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*/
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#define s(n) (1 << s_nr_to_id(n))
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#define SRV_M (~0)
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#define SYS_M (~0)
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#define USR_M (s(PM_PROC_NR) | s(FS_PROC_NR) | s(RS_PROC_NR))
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#define DRV_M (USR_M | s(SYSTEM) | s(CLOCK) | s(LOG_PROC_NR) | s(TTY_PROC_NR))
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/* Define kernel calls that processes are allowed to make. This is not looking
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* very nice, but we need to define the access rights on a per call basis.
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* Note that the system services manager has all bits on, because it should
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* be allowed to distribute rights to services that it starts.
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*/
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#define c(n) (1 << ((n)-KERNEL_CALL))
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#define RS_C ~0
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#define PM_C ~(c(SYS_DEVIO) | c(SYS_SDEVIO) | c(SYS_VDEVIO) \
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| c(SYS_IRQCTL) | c(SYS_INT86))
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#define FS_C (c(SYS_KILL) | c(SYS_VIRCOPY) | c(SYS_VIRVCOPY) | c(SYS_UMAP) \
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| c(SYS_GETINFO) | c(SYS_EXIT) | c(SYS_TIMES) | c(SYS_SETALARM))
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#define DRV_C (FS_C | c(SYS_SEGCTL) | c(SYS_IRQCTL) | c(SYS_INT86) \
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| c(SYS_DEVIO) | c(SYS_VDEVIO) | c(SYS_SDEVIO))
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#define MEM_C (DRV_C | c(SYS_PHYSCOPY) | c(SYS_PHYSVCOPY))
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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, flags, quantum size (qs), scheduling
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* queue, allowed traps, ipc mask, and a name for the process table. The
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* initial program counter and stack size is also provided for kernel tasks.
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*/
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PUBLIC struct boot_image image[] = {
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/* process nr, pc, flags, qs, queue, stack, traps, ipcto, call, name */
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{ IDLE, idle_task, IDL_F, 8, IDLE_Q, IDL_S, 0, 0, 0, "IDLE" },
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{ CLOCK,clock_task, TSK_F, 64, TASK_Q, TSK_S, TSK_T, 0, 0, "CLOCK" },
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{ SYSTEM, sys_task, TSK_F, 64, TASK_Q, TSK_S, TSK_T, 0, 0, "SYSTEM"},
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{ HARDWARE, 0, TSK_F, 64, TASK_Q, HRD_S, 0, 0, 0, "KERNEL"},
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{ PM_PROC_NR, 0, SRV_F, 32, 3, 0, SRV_T, SRV_M, PM_C, "pm" },
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{ FS_PROC_NR, 0, SRV_F, 32, 4, 0, SRV_T, SRV_M, FS_C, "fs" },
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{ RS_PROC_NR, 0, SRV_F, 4, 3, 0, SRV_T, SYS_M, RS_C, "rs" },
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{ TTY_PROC_NR, 0, SRV_F, 4, 1, 0, SRV_T, SYS_M, DRV_C, "tty" },
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{ MEM_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, DRV_M, MEM_C, "memory"},
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{ LOG_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "log" },
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{ DRVR_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "driver"},
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{ INIT_PROC_NR, 0, USR_F, 8, USER_Q, 0, USR_T, USR_M, 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)/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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