FreeCalypso > hg > fc-tourmaline
view cdg-hybrid/cdginc/p_fad.h @ 220:0ed36de51973
ABB semaphore protection overhaul
The ABB semaphone protection logic that came with TCS211 from TI
was broken in several ways:
* Some semaphore-protected functions were called from Application_Initialize()
context. NU_Obtain_Semaphore() called with NU_SUSPEND fails with
NU_INVALID_SUSPEND in this context, but the return value wasn't checked,
and NU_Release_Semaphore() would be called unconditionally at the end.
The latter call would increment the semaphore count past 1, making the
semaphore no longer binary and thus no longer effective for resource
protection. The fix is to check the return value from NU_Obtain_Semaphore()
and skip the NU_Release_Semaphore() call if the semaphore wasn't properly
obtained.
* Some SPI hardware manipulation was being done before entering the semaphore-
protected critical section. The fix is to reorder the code: first obtain
the semaphore, then do everything else.
* In the corner case of L1/DSP recovery, l1_abb_power_on() would call some
non-semaphore-protected ABB & SPI init functions. The fix is to skip those
calls in the case of recovery.
* A few additional corner cases existed, all of which are fixed by making
ABB semaphore protection 100% consistent for all ABB functions and code paths.
There is still one remaining problem of priority inversion: suppose a low-
priority task calls an ABB function, and some medium-priority task just happens
to preempt right in the middle of that semaphore-protected ABB operation. Then
the high-priority SPI task is locked out for a non-deterministic time until
that medium-priority task finishes its work and goes back to sleep. This
priority inversion problem remains outstanding for now.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Mon, 26 Apr 2021 20:55:25 +0000 |
parents | 35f7a1dc9f7d |
children |
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line source
/* +--------------------------------------------------------------------------+ | PROJECT : PROTOCOL STACK | | FILE : p_fad.h | | SOURCE : "sap\fad.pdf" | | LastModified : "2002-04-22" | | IdAndVersion : "8411.103.00.305" | | SrcFileTime : "Thu Nov 29 09:41:22 2007" | | Generated by CCDGEN_2.5.5A on Fri Oct 14 21:41:52 2016 | | !!DO NOT MODIFY!!DO NOT MODIFY!!DO NOT MODIFY!! | +--------------------------------------------------------------------------+ */ /* PRAGMAS * PREFIX : NONE * COMPATIBILITY_DEFINES : NO (require PREFIX) * ALWAYS_ENUM_IN_VAL_FILE: NO * ENABLE_GROUP: NO * CAPITALIZE_TYPENAME: NO */ #ifndef P_FAD_H #define P_FAD_H #define CDG_ENTER__P_FAD_H #define CDG_ENTER__FILENAME _P_FAD_H #define CDG_ENTER__P_FAD_H__FILE_TYPE CDGINC #define CDG_ENTER__P_FAD_H__LAST_MODIFIED _2002_04_22 #define CDG_ENTER__P_FAD_H__ID_AND_VERSION _8411_103_00_305 #define CDG_ENTER__P_FAD_H__SRC_FILE_TIME _Thu_Nov_29_09_41_22_2007 #include "CDG_ENTER.h" #undef CDG_ENTER__P_FAD_H #undef CDG_ENTER__FILENAME #include "p_fad.val" /* * End of substructure section, begin of primitive definition section */ #ifndef __T_FAD_ACTIVATE_REQ__ #define __T_FAD_ACTIVATE_REQ__ /* * * CCDGEN:WriteStruct_Count==1549 */ typedef struct { U16 trans_rate; /*< 0: 2> transmission rate */ U16 frames_per_prim; /*< 2: 2> no. of frames per primitive */ } T_FAD_ACTIVATE_REQ; #endif #ifndef __T_FAD_DEACTIVATE_REQ__ #define __T_FAD_DEACTIVATE_REQ__ /* * * CCDGEN:WriteStruct_Count==1550 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_DEACTIVATE_REQ; #endif #ifndef __T_FAD_MODIFY_REQ__ #define __T_FAD_MODIFY_REQ__ /* * * CCDGEN:WriteStruct_Count==1551 */ typedef struct { U16 trans_rate; /*< 0: 2> transmission rate */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_FAD_MODIFY_REQ; #endif #ifndef __T_FAD_DATA_REQ__ #define __T_FAD_DATA_REQ__ /* * * CCDGEN:WriteStruct_Count==1552 */ typedef struct { U8 final; /*< 0: 1> final flag */ U8 _align0; /*< 1: 1> alignment */ U16 trans_rate; /*< 2: 2> transmission rate */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_FAD_DATA_REQ; #endif #ifndef __T_FAD_DATA_IND__ #define __T_FAD_DATA_IND__ /* * * CCDGEN:WriteStruct_Count==1553 */ typedef struct { U8 final; /*< 0: 1> final flag */ U8 _align0; /*< 1: 1> alignment */ U16 reserved; /*< 2: 2> Reserved */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_FAD_DATA_IND; #endif #ifndef __T_FAD_DATA_CNF__ #define __T_FAD_DATA_CNF__ /* * * CCDGEN:WriteStruct_Count==1554 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_DATA_CNF; #endif #ifndef __T_FAD_SND_TCF_REQ__ #define __T_FAD_SND_TCF_REQ__ /* * * CCDGEN:WriteStruct_Count==1555 */ typedef struct { U16 trans_rate; /*< 0: 2> transmission rate */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_FAD_SND_TCF_REQ; #endif #ifndef __T_FAD_SND_TCF_CNF__ #define __T_FAD_SND_TCF_CNF__ /* * * CCDGEN:WriteStruct_Count==1556 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_SND_TCF_CNF; #endif #ifndef __T_FAD_RCV_TCF_REQ__ #define __T_FAD_RCV_TCF_REQ__ /* * * CCDGEN:WriteStruct_Count==1557 */ typedef struct { U16 trans_rate; /*< 0: 2> transmission rate */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_FAD_RCV_TCF_REQ; #endif #ifndef __T_FAD_RCV_TCF_CNF__ #define __T_FAD_RCV_TCF_CNF__ /* * * CCDGEN:WriteStruct_Count==1558 */ typedef struct { U8 ratio; /*< 0: 1> percentage of correct TCF received */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_FAD_RCV_TCF_CNF; #endif #ifndef __T_FAD_READY_REQ__ #define __T_FAD_READY_REQ__ /* * * CCDGEN:WriteStruct_Count==1559 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_READY_REQ; #endif #ifndef __T_FAD_READY_IND__ #define __T_FAD_READY_IND__ /* * * CCDGEN:WriteStruct_Count==1560 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_READY_IND; #endif #ifndef __T_FAD_IGNORE_REQ__ #define __T_FAD_IGNORE_REQ__ /* * * CCDGEN:WriteStruct_Count==1561 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_IGNORE_REQ; #endif #ifndef __T_FAD_MUX_IND__ #define __T_FAD_MUX_IND__ /* * * CCDGEN:WriteStruct_Count==1562 */ typedef struct { U8 mode; /*< 0: 1> receive mode */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_FAD_MUX_IND; #endif #ifndef __T_FAD_ERROR_IND__ #define __T_FAD_ERROR_IND__ /* * * CCDGEN:WriteStruct_Count==1563 */ typedef struct { U16 cause; /*< 0: 2> error cause */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_FAD_ERROR_IND; #endif #ifndef __T_FAD_DEACTIVATE_CNF__ #define __T_FAD_DEACTIVATE_CNF__ /* * * CCDGEN:WriteStruct_Count==1564 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_FAD_DEACTIVATE_CNF; #endif #ifndef __T_FAD_ACTIVATE_CNF__ #define __T_FAD_ACTIVATE_CNF__ /* * * CCDGEN:WriteStruct_Count==1565 */ typedef struct { U16 buf_size_rx; /*< 0: 2> buffer size RX */ U16 buf_size_tx; /*< 2: 2> buffer size TX */ } T_FAD_ACTIVATE_CNF; #endif #include "CDG_LEAVE.h" #endif