FreeCalypso > hg > fc-tourmaline
view src/ui/mfw/mfw_acie.c @ 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 | 92abb46dc1ba |
children |
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/* +--------------------------------------------------------------------+ | PROJECT: MMI-Framework (8417) $Workfile:: mfw_acie.c $| | $Author:: Es $Revision:: 1 $| | CREATED: 26.10.98 $Modtime:: 2.03.00 15:25 $| | STATE : code | +--------------------------------------------------------------------+ MODULE : MFW_ACIE PURPOSE : This modul contains ACI external functions. $History:: mfw_acie.c $ * * ***************** Version 8 ***************** * User: Es Date: 2.03.00 Time: 16:04 * Updated in $/GSM/Condat/MS/SRC/MFW * some cleanups * * ***************** Version 7 ***************** * User: Vo Date: 12.02.99 Time: 18:59 * Updated in $/GSM/DEV/MS/SRC/MFW * * ***************** Version 6 ***************** * User: Es Date: 8.12.98 Time: 16:53 * Updated in $/GSM/DEV/MS/SRC/MFW * * ***************** Version 5 ***************** * User: Vo Date: 24.11.98 Time: 21:40 * Updated in $/GSM/DEV/MS/SRC/MFW * first successful compilation of MFW | | ***************** Version 4 ***************** | User: Le Date: 11.11.98 Time: 13:35 | Updated in $/GSM/DEV/MS/SRC/MFW | | ***************** Version 3 ***************** | User: Le Date: 10.11.98 Time: 16:07 | Updated in $/GSM/DEV/MS/SRC/MFW | | ***************** Version 2 ***************** | User: Le Date: 10.11.98 Time: 11:08 | Updated in $/GSM/DEV/MS/SRC/MFW | | ***************** Version 1 ***************** | User: Le Date: 27.10.98 Time: 15:58 | Created in $/GSM/DEV/MS/SRC/MFW | first implementation */ #define ENTITY_MFW #if defined (NEW_FRAME) #include "typedefs.h" #include "vsi.h" #include "custom.h" #include "gsm.h" #else #include "STDDEFS.H" #include "custom.h" #include "gsm.h" #include "vsi.h" #endif #ifdef BT_INTERFACE #include "Bti.h" #include "mfw_mfw.h" #include "mfw_bt.h" #endif #include "mfw_acie.h" #include <string.h> T_MFW_ACI_EXT aci_ext_handler [MAX_ACI_HANDLER]; #ifdef BT_INTERFACE int pSlotBt = 0; #endif /* +--------------------------------------------------------------------+ | PROJECT: GSM-MFW (8417) MODULE: MFW_ACIE | | STATE : code ROUTINE: aci_ext_init | +--------------------------------------------------------------------+ PURPOSE : */ void aci_ext_init() { UBYTE i; TRACE_FUNCTION ("aci_ext_init()"); for (i=0;i<MAX_ACI_HANDLER;i++) { aci_ext_handler[i].prim_handler = NULL; aci_ext_handler[i].cmd_handler = NULL; } } /* +--------------------------------------------------------------------+ | PROJECT: GSM-MFW (8417) MODULE: MFW_ACIE | | STATE : code ROUTINE: aci_create | +--------------------------------------------------------------------+ PURPOSE : */ GLOBAL int aci_create(T_PRIM_HANDLER prim_func, T_CMD_HANDLER cmd_func) { UBYTE i; TRACE_FUNCTION ("aci_create()"); /* changes to resolve the BUG OMAPS00064964, checking wether the * callbacks are registered twice. */ for (i=0;i<MAX_ACI_HANDLER;i++) { if(aci_ext_handler[i].prim_handler EQ prim_func AND aci_ext_handler[i].cmd_handler EQ cmd_func) { return i; } } for (i=0;i<MAX_ACI_HANDLER;i++) { if (aci_ext_handler[i].prim_handler EQ NULL AND aci_ext_handler[i].cmd_handler EQ NULL) { /* * empty entry */ aci_ext_handler[i].prim_handler = prim_func; aci_ext_handler[i].cmd_handler = cmd_func; return i; } } return -1; } /* +--------------------------------------------------------------------+ | PROJECT: GSM-MFW (8417) MODULE: MFW_ACIE | | STATE : code ROUTINE: aci_delete | +--------------------------------------------------------------------+ PURPOSE : */ GLOBAL void aci_delete(int handle) { TRACE_FUNCTION ("aci_delete ()"); if (handle >= 0 AND handle < MAX_ACI_HANDLER) { aci_ext_handler[handle].prim_handler = NULL; aci_ext_handler[handle].cmd_handler = NULL; } } /* +--------------------------------------------------------------------+ | PROJECT: GSM-MFW (8417) MODULE: MFW_ACIE | | STATE : code ROUTINE: aci_check_primitive | +--------------------------------------------------------------------+ PURPOSE : */ GLOBAL BOOL aci_check_primitive(ULONG opc, void * data) { UBYTE i; TRACE_FUNCTION ("aci_check_primitive()"); for (i=0;i<MAX_ACI_HANDLER;i++) { if (aci_ext_handler[i].prim_handler NEQ NULL) { /* * extension handler is installed; pass 32 bit opcode to primitive * handling function; note that the MFW functions are similar to pei_primitive * of aci_pei.c and as a loop is used and thus any primitive is parsed, the casting * to 32 bit opcodes needs to be performed inside those handling functions * which handle still 16bit SAPs */ if (aci_ext_handler[i].prim_handler(opc, data)) /* * primitive is processed by the extension */ return TRUE; } } #ifdef _SIMULATION_ #ifdef BT_INTERFACE if(!pSlotBt) { TRACE_EVENT_P1 ("mfw_acie:pSlotBt = %d",pSlotBt); bt_init(); } #endif #endif /* * primitive is not processed by the extension */ return FALSE; } /* +--------------------------------------------------------------------+ | PROJECT: GSM-MFW (8417) MODULE: MFW_ACIE | | STATE : code ROUTINE: aci_check_command | +--------------------------------------------------------------------+ PURPOSE : */ GLOBAL BOOL aci_check_command(char * cmd) { UBYTE i; TRACE_FUNCTION ("aci_check_command()"); for (i=0;i<MAX_ACI_HANDLER;i++) { if (aci_ext_handler[i].cmd_handler NEQ NULL) { /* * extension handler is installed */ if ((*aci_ext_handler[i].cmd_handler) (cmd)) /* * command is processed by the extension */ return TRUE; } } /* * command is not processed by the extension */ return FALSE; }