FreeCalypso > hg > fc-tourmaline
view cdg-hybrid/cdginc/p_uart.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_uart.h | | SOURCE : "sap\uart.pdf" | | LastModified : "2002-03-11" | | IdAndVersion : "8441.117.99.014" | | SrcFileTime : "Thu Nov 29 09:56:02 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_UART_H #define P_UART_H #define CDG_ENTER__P_UART_H #define CDG_ENTER__FILENAME _P_UART_H #define CDG_ENTER__P_UART_H__FILE_TYPE CDGINC #define CDG_ENTER__P_UART_H__LAST_MODIFIED _2002_03_11 #define CDG_ENTER__P_UART_H__ID_AND_VERSION _8441_117_99_014 #define CDG_ENTER__P_UART_H__SRC_FILE_TIME _Thu_Nov_29_09_56_02_2007 #include "CDG_ENTER.h" #undef CDG_ENTER__P_UART_H #undef CDG_ENTER__FILENAME #include "p_uart.val" #ifndef __T_comPar__ #define __T_comPar__ /* * Parameters of serial link * CCDGEN:WriteStruct_Count==3109 */ typedef struct { U8 speed; /*< 0: 1> baud rate */ U8 bpc; /*< 1: 1> bits per character */ U8 nsb; /*< 2: 1> stop bits */ U8 parity; /*< 3: 1> parity of serial link */ U8 flow_rx; /*< 4: 1> flow control mode RX */ U8 flow_tx; /*< 5: 1> flow control mode TX */ U8 xon_valid; /*< 6: 1> indicator whether xon is valid */ U8 xon; /*< 7: 1> XOn character for XON/XOFF flow control */ U8 xoff_valid; /*< 8: 1> indicator whether xoff is valid */ U8 xoff; /*< 9: 1> XOff character for XON/XOFF flow control */ U8 esc_valid; /*< 10: 1> indicator whether esc_char and esc_gp are valid */ U8 esc_char; /*< 11: 1> escape character */ U16 esc_gp; /*< 12: 2> guard period */ U8 _align0; /*< 14: 1> alignment */ U8 _align1; /*< 15: 1> alignment */ } T_comPar; #endif /* * End of substructure section, begin of primitive definition section */ #ifndef __T_UART_PARAMETERS_REQ__ #define __T_UART_PARAMETERS_REQ__ /* * * CCDGEN:WriteStruct_Count==3110 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ T_comPar comPar; /*< 4: 16> Parameters of serial link */ } T_UART_PARAMETERS_REQ; #endif #ifndef __T_UART_PARAMETERS_CNF__ #define __T_UART_PARAMETERS_CNF__ /* * * CCDGEN:WriteStruct_Count==3111 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_PARAMETERS_CNF; #endif #ifndef __T_UART_PARAMETERS_IND__ #define __T_UART_PARAMETERS_IND__ /* * * CCDGEN:WriteStruct_Count==3112 */ typedef struct { U8 uart_instances; /*< 0: 1> number of UART instances */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_PARAMETERS_IND; #endif #ifndef __T_UART_DTI_REQ__ #define __T_UART_DTI_REQ__ /* * * CCDGEN:WriteStruct_Count==3113 */ typedef struct { U8 dti_conn; /*< 0: 1> DTI connect */ U8 device; /*< 1: 1> device number */ U8 dlci; /*< 2: 1> data link connection identifier */ U8 direction; /*< 3: 1> direction of the DTI link */ U32 link_id; /*< 4: 4> identifier of DTI connection */ U32 entity_name; /*< 8: 4> communication entity name */ } T_UART_DTI_REQ; #endif #ifndef __T_UART_DTI_CNF__ #define __T_UART_DTI_CNF__ /* * * CCDGEN:WriteStruct_Count==3114 */ typedef struct { U8 dti_conn; /*< 0: 1> DTI connect */ U8 device; /*< 1: 1> device number */ U8 dlci; /*< 2: 1> data link connection identifier */ U8 _align0; /*< 3: 1> alignment */ } T_UART_DTI_CNF; #endif #ifndef __T_UART_DTI_IND__ #define __T_UART_DTI_IND__ /* * * CCDGEN:WriteStruct_Count==3115 */ typedef struct { U8 dti_conn; /*< 0: 1> DTI connect */ U8 device; /*< 1: 1> device number */ U8 dlci; /*< 2: 1> data link connection identifier */ U8 _align0; /*< 3: 1> alignment */ } T_UART_DTI_IND; #endif #ifndef __T_UART_DISABLE_REQ__ #define __T_UART_DISABLE_REQ__ /* * * CCDGEN:WriteStruct_Count==3116 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_DISABLE_REQ; #endif #ifndef __T_UART_DISABLE_CNF__ #define __T_UART_DISABLE_CNF__ /* * * CCDGEN:WriteStruct_Count==3117 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_DISABLE_CNF; #endif #ifndef __T_UART_RING_REQ__ #define __T_UART_RING_REQ__ /* * * CCDGEN:WriteStruct_Count==3118 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 line_state; /*< 2: 1> state of line */ U8 _align0; /*< 3: 1> alignment */ } T_UART_RING_REQ; #endif #ifndef __T_UART_RING_CNF__ #define __T_UART_RING_CNF__ /* * * CCDGEN:WriteStruct_Count==3119 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_UART_RING_CNF; #endif #ifndef __T_UART_DCD_REQ__ #define __T_UART_DCD_REQ__ /* * * CCDGEN:WriteStruct_Count==3120 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 line_state; /*< 2: 1> state of line */ U8 _align0; /*< 3: 1> alignment */ } T_UART_DCD_REQ; #endif #ifndef __T_UART_DCD_CNF__ #define __T_UART_DCD_CNF__ /* * * CCDGEN:WriteStruct_Count==3121 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_UART_DCD_CNF; #endif #ifndef __T_UART_ESCAPE_REQ__ #define __T_UART_ESCAPE_REQ__ /* * * CCDGEN:WriteStruct_Count==3122 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 detection; /*< 2: 1> escape sequence detection */ U8 _align0; /*< 3: 1> alignment */ } T_UART_ESCAPE_REQ; #endif #ifndef __T_UART_ESCAPE_CNF__ #define __T_UART_ESCAPE_CNF__ /* * * CCDGEN:WriteStruct_Count==3123 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_UART_ESCAPE_CNF; #endif #ifndef __T_UART_DETECTED_IND__ #define __T_UART_DETECTED_IND__ /* * * CCDGEN:WriteStruct_Count==3124 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 cause; /*< 2: 1> cause of indication */ U8 _align0; /*< 3: 1> alignment */ } T_UART_DETECTED_IND; #endif #ifndef __T_UART_ERROR_IND__ #define __T_UART_ERROR_IND__ /* * * CCDGEN:WriteStruct_Count==3125 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 error; /*< 2: 1> error code */ U8 _align0; /*< 3: 1> alignment */ } T_UART_ERROR_IND; #endif #ifndef __T_UART_MUX_START_REQ__ #define __T_UART_MUX_START_REQ__ /* * * CCDGEN:WriteStruct_Count==3126 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 mode; /*< 1: 1> transparency mechanism */ U8 frame_type; /*< 2: 1> type of frame */ U8 _align0; /*< 3: 1> alignment */ U16 n1; /*< 4: 2> maximum frame size */ U8 t1; /*< 6: 1> acknowledgement timer */ U8 n2; /*< 7: 1> maximum numer of retransmissions */ U8 t2; /*< 8: 1> response timer for the multiplexer control channel */ U8 t3; /*< 9: 1> wake up response timer */ U8 _align1; /*< 10: 1> alignment */ U8 _align2; /*< 11: 1> alignment */ } T_UART_MUX_START_REQ; #endif #ifndef __T_UART_MUX_START_CNF__ #define __T_UART_MUX_START_CNF__ /* * * CCDGEN:WriteStruct_Count==3127 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_START_CNF; #endif #ifndef __T_UART_MUX_DLC_ESTABLISH_IND__ #define __T_UART_MUX_DLC_ESTABLISH_IND__ /* * * CCDGEN:WriteStruct_Count==3128 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 convergence; /*< 2: 1> convergence layer */ U8 _align0; /*< 3: 1> alignment */ U16 n1; /*< 4: 2> maximum frame size */ U8 service; /*< 6: 1> service on DLC */ U8 _align1; /*< 7: 1> alignment */ } T_UART_MUX_DLC_ESTABLISH_IND; #endif #ifndef __T_UART_MUX_DLC_ESTABLISH_RES__ #define __T_UART_MUX_DLC_ESTABLISH_RES__ /* * * CCDGEN:WriteStruct_Count==3129 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U16 n1; /*< 2: 2> maximum frame size */ } T_UART_MUX_DLC_ESTABLISH_RES; #endif #ifndef __T_UART_MUX_DLC_RELEASE_REQ__ #define __T_UART_MUX_DLC_RELEASE_REQ__ /* * * CCDGEN:WriteStruct_Count==3130 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_UART_MUX_DLC_RELEASE_REQ; #endif #ifndef __T_UART_MUX_DLC_RELEASE_IND__ #define __T_UART_MUX_DLC_RELEASE_IND__ /* * * CCDGEN:WriteStruct_Count==3131 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 dlci; /*< 1: 1> data link connection identifier */ U8 _align0; /*< 2: 1> alignment */ U8 _align1; /*< 3: 1> alignment */ } T_UART_MUX_DLC_RELEASE_IND; #endif #ifndef __T_UART_MUX_SLEEP_REQ__ #define __T_UART_MUX_SLEEP_REQ__ /* * * CCDGEN:WriteStruct_Count==3132 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_SLEEP_REQ; #endif #ifndef __T_UART_MUX_SLEEP_IND__ #define __T_UART_MUX_SLEEP_IND__ /* * * CCDGEN:WriteStruct_Count==3133 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_SLEEP_IND; #endif #ifndef __T_UART_MUX_WAKEUP_REQ__ #define __T_UART_MUX_WAKEUP_REQ__ /* * * CCDGEN:WriteStruct_Count==3134 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_WAKEUP_REQ; #endif #ifndef __T_UART_MUX_WAKEUP_IND__ #define __T_UART_MUX_WAKEUP_IND__ /* * * CCDGEN:WriteStruct_Count==3135 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_WAKEUP_IND; #endif #ifndef __T_UART_MUX_CLOSE_REQ__ #define __T_UART_MUX_CLOSE_REQ__ /* * * CCDGEN:WriteStruct_Count==3136 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_CLOSE_REQ; #endif #ifndef __T_UART_MUX_CLOSE_IND__ #define __T_UART_MUX_CLOSE_IND__ /* * * CCDGEN:WriteStruct_Count==3137 */ typedef struct { U8 device; /*< 0: 1> device number */ U8 _align0; /*< 1: 1> alignment */ U8 _align1; /*< 2: 1> alignment */ U8 _align2; /*< 3: 1> alignment */ } T_UART_MUX_CLOSE_IND; #endif #ifndef __T_UART_DRIVER_SENT_IND__ #define __T_UART_DRIVER_SENT_IND__ /* * * CCDGEN:WriteStruct_Count==3138 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_SENT_IND; #endif #ifndef __T_UART_DRIVER_RECEIVED_IND__ #define __T_UART_DRIVER_RECEIVED_IND__ /* * * CCDGEN:WriteStruct_Count==3139 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_RECEIVED_IND; #endif #ifndef __T_UART_DRIVER_FLUSHED_IND__ #define __T_UART_DRIVER_FLUSHED_IND__ /* * * CCDGEN:WriteStruct_Count==3140 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_FLUSHED_IND; #endif #ifndef __T_UART_DRIVER_CONNECT_IND__ #define __T_UART_DRIVER_CONNECT_IND__ /* * * CCDGEN:WriteStruct_Count==3141 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_CONNECT_IND; #endif #ifndef __T_UART_DRIVER_DISCONNECT_IND__ #define __T_UART_DRIVER_DISCONNECT_IND__ /* * * CCDGEN:WriteStruct_Count==3142 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_DISCONNECT_IND; #endif #ifndef __T_UART_DRIVER_CLEAR_IND__ #define __T_UART_DRIVER_CLEAR_IND__ /* * * CCDGEN:WriteStruct_Count==3143 */ typedef struct { U32 devId; /*< 0: 4> device ID */ } T_UART_DRIVER_CLEAR_IND; #endif #include "CDG_LEAVE.h" #endif