FreeCalypso > hg > fc-tourmaline
view cdg-hybrid/cdginc/p_ra.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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/* +--------------------------------------------------------------------------+ | PROJECT : PROTOCOL STACK | | FILE : p_ra.h | | SOURCE : "sap\ra.pdf" | | LastModified : "2002-04-26" | | IdAndVersion : "8411.102.98.204" | | SrcFileTime : "Thu Nov 29 09:51:34 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_RA_H #define P_RA_H #define CDG_ENTER__P_RA_H #define CDG_ENTER__FILENAME _P_RA_H #define CDG_ENTER__P_RA_H__FILE_TYPE CDGINC #define CDG_ENTER__P_RA_H__LAST_MODIFIED _2002_04_26 #define CDG_ENTER__P_RA_H__ID_AND_VERSION _8411_102_98_204 #define CDG_ENTER__P_RA_H__SRC_FILE_TIME _Thu_Nov_29_09_51_34_2007 #include "CDG_ENTER.h" #undef CDG_ENTER__P_RA_H #undef CDG_ENTER__FILENAME #include "p_ra.val" /* * End of substructure section, begin of primitive definition section */ #ifndef __T_RA_ACTIVATE_REQ__ #define __T_RA_ACTIVATE_REQ__ /* * * CCDGEN:WriteStruct_Count==2398 */ typedef struct { U8 model; /*< 0: 1> transfer protocol model */ U8 tra_rate; /*< 1: 1> transmission rate */ U8 user_rate; /*< 2: 1> user rate */ U8 ndb; /*< 3: 1> number data bits */ U8 nsb; /*< 4: 1> number stop bits */ U8 _align0; /*< 5: 1> alignment */ U8 _align1; /*< 6: 1> alignment */ U8 _align2; /*< 7: 1> alignment */ } T_RA_ACTIVATE_REQ; #endif #ifndef __T_RA_DEACTIVATE_REQ__ #define __T_RA_DEACTIVATE_REQ__ /* * * CCDGEN:WriteStruct_Count==2399 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_RA_DEACTIVATE_REQ; #endif #ifndef __T_RA_READY_IND__ #define __T_RA_READY_IND__ /* * * CCDGEN:WriteStruct_Count==2400 */ typedef struct { U8 req_frames; /*< 0: 1> requested frames */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_RA_READY_IND; #endif #ifndef __T_RA_DATA_REQ__ #define __T_RA_DATA_REQ__ /* * * CCDGEN:WriteStruct_Count==2401 */ typedef struct { U8 fr_type; /*< 0: 1> frame type */ U8 dtx_flg; /*< 1: 1> discontinuous transmission flag */ U8 status; /*< 2: 1> V24 Status */ U8 reserved; /*< 3: 1> Reserved */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_RA_DATA_REQ; #endif #ifndef __T_RA_BREAK_REQ__ #define __T_RA_BREAK_REQ__ /* * * CCDGEN:WriteStruct_Count==2402 */ typedef struct { U16 break_len; /*< 0: 2> Break Length */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_RA_BREAK_REQ; #endif #ifndef __T_RA_DATA_IND__ #define __T_RA_DATA_IND__ /* * * CCDGEN:WriteStruct_Count==2403 */ typedef struct { U8 fr_type; /*< 0: 1> frame type */ U8 status; /*< 1: 1> V24 Status */ U8 reserved; /*< 2: 1> Reserved */ U8 _align0; /*< 3: 1> alignment */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_RA_DATA_IND; #endif #ifndef __T_RA_ACTIVATE_CNF__ #define __T_RA_ACTIVATE_CNF__ /* * * CCDGEN:WriteStruct_Count==2404 */ typedef struct { U8 ack_flg; /*< 0: 1> acknowledge flag */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_RA_ACTIVATE_CNF; #endif #ifndef __T_RA_DEACTIVATE_CNF__ #define __T_RA_DEACTIVATE_CNF__ /* * * CCDGEN:WriteStruct_Count==2405 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_RA_DEACTIVATE_CNF; #endif #ifndef __T_RA_BREAK_IND__ #define __T_RA_BREAK_IND__ /* * * CCDGEN:WriteStruct_Count==2406 */ typedef struct { U16 break_len; /*< 0: 2> Break Length */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_RA_BREAK_IND; #endif #ifndef __T_RA_DETECT_REQ__ #define __T_RA_DETECT_REQ__ /* * * CCDGEN:WriteStruct_Count==2407 */ typedef struct { U8 detect; /*< 0: 1> Detect mode */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_RA_DETECT_REQ; #endif #ifndef __T_RA_MODIFY_REQ__ #define __T_RA_MODIFY_REQ__ /* * * CCDGEN:WriteStruct_Count==2408 */ typedef struct { U8 tra_rate; /*< 0: 1> transmission rate */ U8 user_rate; /*< 1: 1> user rate */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_RA_MODIFY_REQ; #endif #ifndef __T_RA_MODIFY_CNF__ #define __T_RA_MODIFY_CNF__ /* * * CCDGEN:WriteStruct_Count==2409 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_RA_MODIFY_CNF; #endif #ifndef __T_RA_DATATRANS_REQ__ #define __T_RA_DATATRANS_REQ__ /* * * CCDGEN:WriteStruct_Count==2410 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_RA_DATATRANS_REQ; #endif #ifndef __T_SHM_TICK_REQ__ #define __T_SHM_TICK_REQ__ /* * * CCDGEN:WriteStruct_Count==2411 */ typedef struct { U8 tick_dir; /*< 0: 1> tick direction */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_SHM_TICK_REQ; #endif #ifndef __T_SHM_DATA_REQ__ #define __T_SHM_DATA_REQ__ /* * * CCDGEN:WriteStruct_Count==2412 */ typedef struct { U8 fr_type; /*< 0: 1> frame type */ U8 dtx_flg; /*< 1: 1> discontinuous transmission flag */ U8 status; /*< 2: 1> V24 Status */ U8 reserved; /*< 3: 1> Reserved */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_SHM_DATA_REQ; #endif #ifndef __T_SHM_READ_REQ__ #define __T_SHM_READ_REQ__ /* * * CCDGEN:WriteStruct_Count==2413 */ typedef struct { U8 model; /*< 0: 1> transfer protocol model */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_SHM_READ_REQ; #endif #ifndef __T_SHM_DATA_IND__ #define __T_SHM_DATA_IND__ /* * * CCDGEN:WriteStruct_Count==2414 */ typedef struct { U8 fr_type; /*< 0: 1> frame type */ U8 status; /*< 1: 1> V24 Status */ U8 reserved; /*< 2: 1> Reserved */ U8 _align0; /*< 3: 1> alignment */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_SHM_DATA_IND; #endif #ifndef __T_SHM_BITSET_REQ__ #define __T_SHM_BITSET_REQ__ /* * * CCDGEN:WriteStruct_Count==2415 */ typedef struct { U8 id; /*< 0: 1> Bit Identity */ U8 _align0; /*< 1: 1> alignment */ U16 value; /*< 2: 2> Bits value */ } T_SHM_BITSET_REQ; #endif #ifndef __T_SHM_BITTEST_REQ__ #define __T_SHM_BITTEST_REQ__ /* * * CCDGEN:WriteStruct_Count==2416 */ typedef struct { U8 offset; /*< 0: 1> Address offset */ U8 _align0; /*< 1: 1> alignment */ U16 mask; /*< 2: 2> Bit mask */ } T_SHM_BITTEST_REQ; #endif #ifndef __T_SHM_BITTEST_IND__ #define __T_SHM_BITTEST_IND__ /* * * CCDGEN:WriteStruct_Count==2417 */ typedef struct { U16 value; /*< 0: 2> Bits value */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_SHM_BITTEST_IND; #endif #include "CDG_LEAVE.h" #endif