| [4] | 1 | /* The object file of "table.c" contains most kernel data. Variables that
|
|---|
| 2 | * are declared in the *.h files appear with EXTERN in front of them, as in
|
|---|
| 3 | *
|
|---|
| 4 | * EXTERN int x;
|
|---|
| 5 | *
|
|---|
| 6 | * Normally EXTERN is defined as extern, so when they are included in another
|
|---|
| 7 | * file, no storage is allocated. If EXTERN were not present, but just say,
|
|---|
| 8 | *
|
|---|
| 9 | * int x;
|
|---|
| 10 | *
|
|---|
| 11 | * then including this file in several source files would cause 'x' to be
|
|---|
| 12 | * declared several times. While some linkers accept this, others do not,
|
|---|
| 13 | * so they are declared extern when included normally. However, it must be
|
|---|
| 14 | * declared for real somewhere. That is done here, by redefining EXTERN as
|
|---|
| 15 | * the null string, so that inclusion of all *.h files in table.c actually
|
|---|
| 16 | * generates storage for them.
|
|---|
| 17 | *
|
|---|
| 18 | * Various variables could not be declared EXTERN, but are declared PUBLIC
|
|---|
| 19 | * or PRIVATE. The reason for this is that extern variables cannot have a
|
|---|
| 20 | * default initialization. If such variables are shared, they must also be
|
|---|
| 21 | * declared in one of the *.h files without the initialization. Examples
|
|---|
| 22 | * include 'boot_image' (this file) and 'idt' and 'gdt' (protect.c).
|
|---|
| 23 | *
|
|---|
| 24 | * Changes:
|
|---|
| 25 | * Aug 02, 2005 set privileges and minimal boot image (Jorrit N. Herder)
|
|---|
| 26 | * Oct 17, 2004 updated above and tasktab comments (Jorrit N. Herder)
|
|---|
| 27 | * May 01, 2004 changed struct for system image (Jorrit N. Herder)
|
|---|
| 28 | */
|
|---|
| 29 | #define _TABLE
|
|---|
| 30 |
|
|---|
| 31 | #include "kernel.h"
|
|---|
| 32 | #include "proc.h"
|
|---|
| 33 | #include "ipc.h"
|
|---|
| 34 | #include <minix/com.h>
|
|---|
| 35 | #include <ibm/int86.h>
|
|---|
| 36 |
|
|---|
| 37 | /* Define stack sizes for the kernel tasks included in the system image. */
|
|---|
| 38 | #define NO_STACK 0
|
|---|
| 39 | #define SMALL_STACK (128 * sizeof(char *))
|
|---|
| 40 | #define IDL_S SMALL_STACK /* 3 intr, 3 temps, 4 db for Intel */
|
|---|
| 41 | #define HRD_S NO_STACK /* dummy task, uses kernel stack */
|
|---|
| 42 | #define TSK_S SMALL_STACK /* system and clock task */
|
|---|
| 43 |
|
|---|
| 44 | /* Stack space for all the task stacks. Declared as (char *) to align it. */
|
|---|
| 45 | #define TOT_STACK_SPACE (IDL_S + HRD_S + (2 * TSK_S))
|
|---|
| 46 | PUBLIC char *t_stack[TOT_STACK_SPACE / sizeof(char *)];
|
|---|
| 47 |
|
|---|
| 48 | /* Define flags for the various process types. */
|
|---|
| 49 | #define IDL_F (SYS_PROC | PREEMPTIBLE | BILLABLE) /* idle task */
|
|---|
| 50 | #define TSK_F (SYS_PROC) /* kernel tasks */
|
|---|
| 51 | #define SRV_F (SYS_PROC | PREEMPTIBLE) /* system services */
|
|---|
| 52 | #define USR_F (BILLABLE | PREEMPTIBLE) /* user processes */
|
|---|
| 53 |
|
|---|
| 54 | /* Define system call traps for the various process types. These call masks
|
|---|
| 55 | * determine what system call traps a process is allowed to make.
|
|---|
| 56 | */
|
|---|
| 57 | #define TSK_T (1 << RECEIVE) /* clock and system */
|
|---|
| 58 | #define SRV_T (~0) /* system services */
|
|---|
| 59 | #define USR_T ((1 << SENDREC) | (1 << ECHO)) /* user processes */
|
|---|
| 60 |
|
|---|
| 61 | /* Send masks determine to whom processes can send messages or notifications.
|
|---|
| 62 | * The values here are used for the processes in the boot image. We rely on
|
|---|
| 63 | * the initialization code in main() to match the s_nr_to_id() mapping for the
|
|---|
| 64 | * processes in the boot image, so that the send mask that is defined here
|
|---|
| 65 | * can be directly copied onto map[0] of the actual send mask. Privilege
|
|---|
| 66 | * structure 0 is shared by user processes.
|
|---|
| 67 | */
|
|---|
| 68 | #define s(n) (1 << s_nr_to_id(n))
|
|---|
| 69 | #define SRV_M (~0)
|
|---|
| 70 | #define SYS_M (~0)
|
|---|
| 71 | #define USR_M (s(PM_PROC_NR) | s(FS_PROC_NR) | s(RS_PROC_NR))
|
|---|
| 72 | #define DRV_M (USR_M | s(SYSTEM) | s(CLOCK) | s(LOG_PROC_NR) | s(TTY_PROC_NR))
|
|---|
| 73 |
|
|---|
| 74 | /* Define kernel calls that processes are allowed to make. This is not looking
|
|---|
| 75 | * very nice, but we need to define the access rights on a per call basis.
|
|---|
| 76 | * Note that the reincarnation server has all bits on, because it should
|
|---|
| 77 | * be allowed to distribute rights to services that it starts.
|
|---|
| 78 | */
|
|---|
| 79 | #define c(n) (1 << ((n)-KERNEL_CALL))
|
|---|
| 80 | #define RS_C ~0
|
|---|
| 81 | #define PM_C ~(c(SYS_DEVIO) | c(SYS_SDEVIO) | c(SYS_VDEVIO) \
|
|---|
| 82 | | c(SYS_IRQCTL) | c(SYS_INT86))
|
|---|
| 83 | #define FS_C (c(SYS_KILL) | c(SYS_VIRCOPY) | c(SYS_VIRVCOPY) | c(SYS_UMAP) \
|
|---|
| 84 | | c(SYS_GETINFO) | c(SYS_EXIT) | c(SYS_TIMES) | c(SYS_SETALARM))
|
|---|
| 85 | #define DRV_C (FS_C | c(SYS_SEGCTL) | c(SYS_IRQCTL) | c(SYS_INT86) \
|
|---|
| 86 | | c(SYS_DEVIO) | c(SYS_VDEVIO) | c(SYS_SDEVIO))
|
|---|
| 87 | #define MEM_C (DRV_C | c(SYS_PHYSCOPY) | c(SYS_PHYSVCOPY))
|
|---|
| 88 |
|
|---|
| 89 | /* The system image table lists all programs that are part of the boot image.
|
|---|
| 90 | * The order of the entries here MUST agree with the order of the programs
|
|---|
| 91 | * in the boot image and all kernel tasks must come first.
|
|---|
| 92 | * Each entry provides the process number, flags, quantum size (qs), scheduling
|
|---|
| 93 | * queue, allowed traps, ipc mask, and a name for the process table. The
|
|---|
| 94 | * initial program counter and stack size is also provided for kernel tasks.
|
|---|
| 95 | */
|
|---|
| 96 | PUBLIC struct boot_image image[] = {
|
|---|
| 97 | /* process nr, pc, flags, qs, queue, stack, traps, ipcto, call, name */
|
|---|
| 98 | { IDLE, idle_task, IDL_F, 8, IDLE_Q, IDL_S, 0, 0, 0, "IDLE" },
|
|---|
| 99 | { CLOCK,clock_task, TSK_F, 64, TASK_Q, TSK_S, TSK_T, 0, 0, "CLOCK" },
|
|---|
| 100 | { SYSTEM, sys_task, TSK_F, 64, TASK_Q, TSK_S, TSK_T, 0, 0, "SYSTEM"},
|
|---|
| 101 | { HARDWARE, 0, TSK_F, 64, TASK_Q, HRD_S, 0, 0, 0, "KERNEL"},
|
|---|
| 102 | { PM_PROC_NR, 0, SRV_F, 32, 3, 0, SRV_T, SRV_M, PM_C, "pm" },
|
|---|
| 103 | { FS_PROC_NR, 0, SRV_F, 32, 4, 0, SRV_T, SRV_M, FS_C, "fs" },
|
|---|
| 104 | { RS_PROC_NR, 0, SRV_F, 4, 3, 0, SRV_T, SYS_M, RS_C, "rs" },
|
|---|
| 105 | { TTY_PROC_NR, 0, SRV_F, 4, 1, 0, SRV_T, SYS_M, DRV_C, "tty" },
|
|---|
| 106 | { MEM_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, DRV_M, MEM_C, "memory"},
|
|---|
| 107 | { LOG_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "log" },
|
|---|
| 108 | { DRVR_PROC_NR, 0, SRV_F, 4, 2, 0, SRV_T, SYS_M, DRV_C, "driver"},
|
|---|
| 109 | { INIT_PROC_NR, 0, USR_F, 8, USER_Q, 0, USR_T, USR_M, 0, "init" },
|
|---|
| 110 | };
|
|---|
| 111 |
|
|---|
| 112 | /* Verify the size of the system image table at compile time. Also verify that
|
|---|
| 113 | * the first chunk of the ipc mask has enough bits to accommodate the processes
|
|---|
| 114 | * in the image.
|
|---|
| 115 | * If a problem is detected, the size of the 'dummy' array will be negative,
|
|---|
| 116 | * causing a compile time error. Note that no space is actually allocated
|
|---|
| 117 | * because 'dummy' is declared extern.
|
|---|
| 118 | */
|
|---|
| 119 | extern int dummy[(NR_BOOT_PROCS==sizeof(image)/
|
|---|
| 120 | sizeof(struct boot_image))?1:-1];
|
|---|
| 121 | extern int dummy[(BITCHUNK_BITS > NR_BOOT_PROCS - 1) ? 1 : -1];
|
|---|
| 122 |
|
|---|
