funnyos/sys/kern_sched.h - diff

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Diff for /funnyos/sys/kern_sched.h between version 1.2 and 1.3

-version 1.2, 2007/11/20 12:57:37
+version 1.3, 2007/11/20 16:07:23
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  #include <sys/types.h>
  /*
-  * Task header is used by user to describe task in config.c
+  * Task header is used by user to describe task in config.c.
+  * "user task".
   */
- struct taskheader {
+ struct u_task {
-         const char *th_name;                            /* task name */
+         const char *ut_name;                    /* task name */
-         uint8_t         th_priority;                    /* priority, bigger the value = higher priority */
+         uint8_t         ut_priority;            /* priority, bigger the value = higher priority */
-         void            (*th_enter)(void);              /* entry point */
+         void            (*ut_enter)(void);      /* entry point */
  };
+ #if 0
  /*
-  * Kernel sees each system task as struct task;
+  * Task PCB (process control block).
+  * this is task's hardware context.
+  */
+ struct pcb __attribute__((packed)) {
+         /* ARM general purpose registers */
+         uint32_t        p_r0;
+ }
+ #endif /* 0 */
+ /*
+  * Kernel sees each system task as struct k_task;
   * it is used for scheduling and context switches.
+  * "kernel task".
   */
- struct task {
+ struct k_task {
-         struct taskheader       *ta_theader;    /* points to user-described data */
+         struct u_task   *kt_utask;      /* points to user-described data */
-         uint8_t                         ta_taskid;              /* task id (TID) */
+         uint8_t                 kt_tid;         /* task id (TID) */
-         uint8_t                         ta_state;               /* task state (running, blocked, etc.) */
+         uint8_t                 kt_state;       /* task state (running, blocked, etc.) */
-         uint32_t                        ta_timeo;               /* timeout (in HZ) if task is blocked */
+ //      uint32_t                kt_timeo;       /* timeout (in HZ) if task is blocked */
-         uint32_t                        *ta_stackptr;   /* task stack addr (used to switch-back to that task) */
+         uint32_t                kt_pcb[15];     /* hardware context (15 ARM registers) */
-         struct task             *ta_nextp;
+         struct k_task   *kt_next;
  };
  /*

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