FreeCalypso > hg > fc-tourmaline
view cdg-hybrid/cdginc/p_mmcm.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_mmcm.h | | SOURCE : "sap\mmcm.pdf" | | LastModified : "2004-02-12" | | IdAndVersion : "6147.104.97.103" | | SrcFileTime : "Thu Nov 29 09:45:56 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 : MMCM * COMPATIBILITY_DEFINES : NO * ALWAYS_ENUM_IN_VAL_FILE: NO * ENABLE_GROUP: NO * CAPITALIZE_TYPENAME: NO */ #ifndef P_MMCM_H #define P_MMCM_H #define CDG_ENTER__P_MMCM_H #define CDG_ENTER__FILENAME _P_MMCM_H #define CDG_ENTER__P_MMCM_H__FILE_TYPE CDGINC #define CDG_ENTER__P_MMCM_H__LAST_MODIFIED _2004_02_12 #define CDG_ENTER__P_MMCM_H__ID_AND_VERSION _6147_104_97_103 #define CDG_ENTER__P_MMCM_H__SRC_FILE_TIME _Thu_Nov_29_09_45_56_2007 #include "CDG_ENTER.h" #undef CDG_ENTER__P_MMCM_H #undef CDG_ENTER__FILENAME #include "p_mmcm.val" #ifndef __T_MMCM_ch_info__ #define __T_MMCM_ch_info__ /* * Channel information * CCDGEN:WriteStruct_Count==1788 */ typedef struct { U8 ch_type; /*< 0: 1> Channel Type */ U8 ch_mode; /*< 1: 1> Channel Mode */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_MMCM_ch_info; #endif #ifndef __T_MMCM_sync_info__ #define __T_MMCM_sync_info__ /* * Container for synchronisation info * CCDGEN:WriteStruct_Count==1790 */ typedef struct { T_MMCM_ch_info ch_info; /*< 0: 4> Channel information */ } T_MMCM_sync_info; #endif /* * End of substructure section, begin of primitive definition section */ #ifndef __T_MMCM_ESTABLISH_REQ__ #define __T_MMCM_ESTABLISH_REQ__ /* * * CCDGEN:WriteStruct_Count==1794 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 org_entity; /*< 1: 1> originating entity */ U16 estcs; /*< 2: 2> establishment cause */ } T_MMCM_ESTABLISH_REQ; #endif #ifndef __T_MMCM_ESTABLISH_CNF__ #define __T_MMCM_ESTABLISH_CNF__ /* * * CCDGEN:WriteStruct_Count==1795 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_MMCM_ESTABLISH_CNF; #endif #ifndef __T_MMCM_ESTABLISH_IND__ #define __T_MMCM_ESTABLISH_IND__ /* * * CCDGEN:WriteStruct_Count==1796 */ typedef struct { U8 d1; /*< 0: 1> dummy, not used */ U8 d2; /*< 1: 1> dummy, not used */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_MMCM_ESTABLISH_IND; #endif #ifndef __T_MMCM_DATA_REQ__ #define __T_MMCM_DATA_REQ__ /* * * CCDGEN:WriteStruct_Count==1797 */ typedef struct { U8 org_entity; /*< 0: 1> originating entity */ U8 d2; /*< 1: 1> dummy, not used */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_MMCM_DATA_REQ; #endif #ifndef __T_MMCM_DATA_IND__ #define __T_MMCM_DATA_IND__ /* * * CCDGEN:WriteStruct_Count==1798 */ typedef struct { U8 d1; /*< 0: 1> dummy, not used */ U8 d2; /*< 1: 1> dummy, not used */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ T_sdu sdu; /*< 4: ? > Service Data Unit */ } T_MMCM_DATA_IND; #endif #ifndef __T_MMCM_RELEASE_REQ__ #define __T_MMCM_RELEASE_REQ__ /* * * CCDGEN:WriteStruct_Count==1799 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 org_entity; /*< 1: 1> originating entity */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_MMCM_RELEASE_REQ; #endif #ifndef __T_MMCM_RELEASE_IND__ #define __T_MMCM_RELEASE_IND__ /* * * CCDGEN:WriteStruct_Count==1800 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U16 cause; /*< 2: 2> MM cause */ } T_MMCM_RELEASE_IND; #endif #ifndef __T_MMCM_ERROR_IND__ #define __T_MMCM_ERROR_IND__ /* * * CCDGEN:WriteStruct_Count==1801 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U16 cause; /*< 2: 2> MM cause */ } T_MMCM_ERROR_IND; #endif #ifndef __T_MMCM_REESTABLISH_REQ__ #define __T_MMCM_REESTABLISH_REQ__ /* * * CCDGEN:WriteStruct_Count==1802 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_MMCM_REESTABLISH_REQ; #endif #ifndef __T_MMCM_REESTABLISH_CNF__ #define __T_MMCM_REESTABLISH_CNF__ /* * * CCDGEN:WriteStruct_Count==1803 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_MMCM_REESTABLISH_CNF; #endif #ifndef __T_MMCM_PROMPT_IND__ #define __T_MMCM_PROMPT_IND__ /* * * CCDGEN:WriteStruct_Count==1804 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_MMCM_PROMPT_IND; #endif #ifndef __T_MMCM_PROMPT_RES__ #define __T_MMCM_PROMPT_RES__ /* * * CCDGEN:WriteStruct_Count==1805 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_MMCM_PROMPT_RES; #endif #ifndef __T_MMCM_PROMPT_REJ__ #define __T_MMCM_PROMPT_REJ__ /* * * CCDGEN:WriteStruct_Count==1806 */ typedef struct { U8 dummy; /*< 0: 1> no parameters */ } T_MMCM_PROMPT_REJ; #endif #ifndef __T_MMCM_SYNC_IND__ #define __T_MMCM_SYNC_IND__ /* * * CCDGEN:WriteStruct_Count==1807 */ typedef struct { U8 ti; /*< 0: 1> transaction identifier */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ T_MMCM_sync_info sync_info; /*< 4: 4> Container for synchronisation info */ } T_MMCM_SYNC_IND; #endif #include "CDG_LEAVE.h" #endif