Changeset 459 for trunk/kernel/kern/thread.h

Timestamp:

Aug 13, 2018, 1:43:20 PM (5 years ago)

Author:

alain

Message:

Introduce the math library, to support the floating point
data used by the multi-thread fft application.
Fix several bugs regarding the FPU context save/restore.
Introduce support for the %f format in printf.

File:

• trunk/kernel/kern/thread.h (modified) (1 diff)

trunk/kernel/kern/thread.h

@@ -118 +118 @@
  * This structure defines a thread descriptor.
  * It is used for both the user threads and the kernel threads.
- * In a process, a user thread is identified by a unique TRDID (thread identifier),
- * that is returned by the kernel to the user:
+ * In a process, a user thread is identified by a unique TRDID (thread identifier):
  * - The TRDID 16 LSB bits contain the LTID (Local Thread Index).
  * - The TRDID 16 MSB bits contain the CXY of cluster containing the thread.
- * - The LTID is used to index the th_tbl[] array in the local process descriptor.
- _* This TRDID is computed by the process_register_thread() function, when the user
+ * The main thread LTID value is always 0. 
+ * The LTID is used to index the th_tbl[] array in the local process descriptor.
+ * This TRDID is computed by the process_register_thread() function, when the user
  * thread is registered in the local copy of the process descriptor.
- *
  * WARNING : Don't modify the first 4 fields order, as this order is used by the
  * hal_kentry assembly code for the TSAR architecture.