Changeset 629 for soft/giet_vm/giet_kernel/ctx_handler.h

Timestamp:

Jul 18, 2015, 3:00:42 PM (9 years ago)

Author:

alain

Message:

Modify the task activation/desactivation mechanism
to support the _kill_application() and _exec_application() system functions.
The RUN Boolean in task context has been replaced by the NORUN bit-vector.

File:

• soft/giet_vm/giet_kernel/ctx_handler.h (modified) (3 diffs)

soft/giet_vm/giet_kernel/ctx_handler.h

@@ -14 +14 @@
 // is launched by the scheduler when there is no other runable task.
 /////////////////////////////////////////////////////////////////////////////////
-// A task context is an array of 64 words = 256 bytes. 
+// A task context is an array of 64 uint32 words => 256 bytes. 
 // It contains copies of processor registers (when the task is preempted)
-// and some general informations associated to a task, such as the peripherals
-// allocated to the task (private peripheral channel)
+// and some general informations associated to a task, such as the private
+// peripheral channels allocated to the task, the vspace index, the various
+// task index (local / global / application), and the runnable status.
 /////////////////////////////////////////////////////////////////////////////////
 // ctx[0] <- ***   |ctx[8] <- $8     |ctx[16]<- $16    |ctx[24]<- $24
@@ -30 +31 @@
 // ctx[32]<- EPC   |ctx[40]<- TTY    |ctx[48]<- TRDID  |ctx[56]<- ***
 // ctx[33]<- CR    |ctx[41]<- CMA_FB |ctx[49]<- GTID   |ctx[57]<- ***
-// ctx[34]<- SR    |ctx[42]<- CMA_RX |ctx[50]<- RUN    |ctx[58]<- ***
+// ctx[34]<- SR    |ctx[42]<- CMA_RX |ctx[50]<- NORUN  |ctx[58]<- ***
 // ctx[35]<- BVAR  |ctx[43]<- CMA_TX |ctx[51]<- COPROC |ctx[59]<- ***
 // ctx[36]<- PTAB  |ctx[44]<- NIC_RX |ctx[52]<- ***    |ctx[60]<- ***
@@ -47 +48 @@
 /////////////////////////////////////////////////////////////////////////////////
 
-#define CTX_SP_ID        29  // Stack Pointer
-#define CTX_RA_ID        31  // Return Address
+#define CTX_SP_ID        29    // Stack Pointer
+#define CTX_RA_ID        31    // Return Address
 
-#define CTX_EPC_ID       32  // Exception Program Counter (CP0)
-#define CTX_CR_ID        33  // Cause Register (CP0)
-#define CTX_SR_ID        34  // Status Register (CP0)
-#define CTX_BVAR_ID      35      // Bad Virtual Address Register (CP0)
-#define CTX_PTAB_ID      36  // Page Table Virtual address
-#define CTX_LTID_ID      37  // Local  Task Index (in scheduler)
-#define CTX_VSID_ID      38  // Vspace Index     
-#define CTX_PTPR_ID      39  // Page Table Pointer Register (PADDR>>13)
+#define CTX_EPC_ID       32    // Exception Program Counter (CP0)
+#define CTX_CR_ID        33    // Cause Register (CP0)
+#define CTX_SR_ID        34    // Status Register (CP0)
+#define CTX_BVAR_ID      35        // Bad Virtual Address Register (CP0)
+#define CTX_PTAB_ID      36    // Page Table Virtual address
+#define CTX_LTID_ID      37    // Local  Task Index (in scheduler)
+#define CTX_VSID_ID      38    // Vspace Index     
+#define CTX_PTPR_ID      39    // Page Table Pointer Register (PADDR>>13)
 
-#define CTX_TTY_ID       40  // private TTY channel index  
-#define CTX_CMA_FB_ID    41  // private CMA channel index for FBF write
-#define CTX_CMA_RX_ID    42  // private CMA channel index for NIC_TX
-#define CTX_CMA_TX_ID    43  // private CMA channel index for NIC_RX
-#define CTX_NIC_RX_ID    44  // private NIC channel index RX transfer
-#define CTX_NIC_TX_ID    45  // private NIC channel index TX transfer
-#define CTX_TIM_ID       46  // ptivate TIM channel index
-#define CTX_HBA_ID       47  // private HBA channel index
+#define CTX_TTY_ID       40    // private TTY channel index  
+#define CTX_CMA_FB_ID    41    // private CMA channel index for FBF write
+#define CTX_CMA_RX_ID    42    // private CMA channel index for NIC_TX
+#define CTX_CMA_TX_ID    43    // private CMA channel index for NIC_RX
+#define CTX_NIC_RX_ID    44    // private NIC channel index RX transfer
+#define CTX_NIC_TX_ID    45    // private NIC channel index TX transfer
+#define CTX_TIM_ID       46    // ptivate TIM channel index
+#define CTX_HBA_ID       47    // private HBA channel index
 
-#define CTX_TRDID_ID     48  // Thread Task Index in vspace
-#define CTX_GTID_ID      49  // Global Task Index in all system
-#define CTX_RUN_ID       50  // Boolean: task runable
-#define CTX_COPROC_ID    51  // cluster_xy : coprocessor coordinates
+#define CTX_TRDID_ID     48    // Thread Task Index in vspace
+#define CTX_GTID_ID      49    // Global Task Index in all system
+#define CTX_NORUN_ID     50    // bit-vector : task runable if all zero
+#define CTX_COPROC_ID    51    // cluster_xy : coprocessor coordinates
 
 /////////////////////////////////////////////////////////////////////////////////
+//    Definition of the NORUN bit-vector masks
+/////////////////////////////////////////////////////////////////////////////////
+
+#define NORUN_MASK_TASK       0x00000001   // Task not active  
+#define NORUN_MASK_IOC        0x00000002   // Task blocked on IOC transfer
+#define NORUN_MASK_COPROC     0x00000004   // Task blocked on COPROC transfer
 
 /////////////////////////////////////////////////////////////////////////////////