tms320c3.c
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C
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<HTML><HEAD><TITLE>/home/asysweb/public_html/cortex/ports/tms320c3/src/tms320c3.c</TITLE></HEAD><BODY><pre><font color="#6920ac">/*************************************************************************/</font><font color="#6920ac">/* */</font><font color="#6920ac">/* Copyright (c) 1997-1999 Australian Real Time Embedded Systems */</font><font color="#6920ac">/* */</font><font color="#6920ac">/* PROPRIETARY RIGHTS of Australian Real Time Embedded Systems */</font><font color="#6920ac">/* are involved in the subject matter of this material. All reproduction,*/</font><font color="#6920ac">/* manufacturing, use, and sales rights pertaining to this subject matter*/</font><font color="#6920ac">/* are governed by the license agreement. The recipient of this software */</font><font color="#6920ac">/* implicitly accepts the terms of the license. */</font><font color="#6920ac">/* */</font><font color="#6920ac">/*************************************************************************/</font><font color="#6920ac">/************************************************************************* * * FILE NAME * * tms320c3.c * * SYSTEM COMPONENT * * TMS320C3X Digital Signal Processor Family * * DESCRIPTION * * This file contains services specific for TMS320C3X DSP platform. * * SCCS HISTORY * * @(#)tms320c3.c 1.21, 12/22/99, 15:52:04 * * SERVICES * * Services for hardware interrupt manager * --------------------------------------- * hrdi_IsIntrMaskBitAllocated * hrdi_EnableVector * hrdi_DisableVector * hrdi_Mask * hrdi_MakeLisrStackFrame * hrdi_CheckStack * hrdi_PrepareStack * hrdi_RegisterDISR * hrdi_UnregisterDISR * hrdi_RegisterDispatcher * hrdi_UnregisterDispatcher * hrdi_Shell * * Services for software interrupt manager * --------------------------------------- * sfti_MakeHisrStackFrame * sfti_CheckStack * sfti_PrepareStack * * Services for thread control component * ------------------------------------- * thrd_MakeThreadStackFrame * thrd_CheckStack * thrd_MaxSP * thrd_AdjustMaxSP * thrd_StackUsage * thrd_GetStackFrames * thrd_IdleThread * thrd_GetStackFrameRegs * * GDB monitor support * ------------------- * gdbm_GetRegisters * * Services for System Timer * ------------------------- * tick_LISR * tick_SetupSystemTimer * tick_ClocksSinceReset * * Others * ------ * port_Init * port_Fatal * port_Abort * port_Exit * port_InitSerial * port_Putc * * AUTHOR * * Vadim N. Azarovsky * * CREATED * * 14-Feb-1998 by Vadim N. Azarovsky * * REVISION HISTORY * * NAME DATE REMARKS * **************************************************************************/</font><b><font color='DarkGreen'>#include</font></b> <a href="env_defs.h.FIND-INC"><font color="blue">"env_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="crt_defs.h.FIND-INC"><font color="blue">"crt_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="sys_priv.h.FIND-INC"><font color="blue">"sys_priv.h"</font></a><b><font color='DarkGreen'>#if</font></b><font color="maroon"> (CRTX_CPU_FAMILY==CRTX_TMS320C3X)</font><b><font color='DarkGreen'>#include</font></b> <a href="ass_defs.h.FIND-INC"><font color="blue">"ass_defs.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="hwi_priv.h.FIND-INC"><font color="blue">"hwi_priv.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="swi_priv.h.FIND-INC"><font color="blue">"swi_priv.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="thr_priv.h.FIND-INC"><font color="blue">"thr_priv.h"</font></a><b><font color='DarkGreen'>#include</font></b> <a href="tck_priv.h.FIND-INC"><font color="blue">"tck_priv.h"</font></a><font color="#6920ac">/* Returns true if interrupt mask bit for specified source is * allocated. Implementation is platform specific. This service is very * useful when several interrupt sources mapped into single intrrupt * mask bit. */</font><font size="+1"><i>crtx_Bool_t</i> <b><font color="azure1"><a name="hrdi_IsIntrMaskBitAllocated">hrdi_IsIntrMaskBitAllocated</a></font></b>( <i>hrdi_Vector_t</i> Vector_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>((Vector_a >= 0) && (Vector_a < <a href="HRDI_INTR_VECTORS.FIND-DEF">HRDI_INTR_VECTORS</a>)) <b>if</b> (<a href="vbit_Get.FIND-FUNC">vbit_Get</a>(&hrdi_Environ_g.RegVectors, Vector_a)) <b>return</b> <a href="CRTX_TRUE.FIND-DEF">CRTX_TRUE</a>; <b>else</b> <b>return</b> <a href="CRTX_FALSE.FIND-DEF">CRTX_FALSE</a>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* Do some additional CPU setup to enable specified source. * This service is called from hrdi_Install(). */</font><font size="+1"><i>crtx_Void_t</i> <b><font color="azure1"><a name="hrdi_EnableVector">hrdi_EnableVector</a></font></b>(<i>hrdi_ISRCB_t</i> *pISRCB_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pISRCB_a) <font color="#6920ac">/* No hadware initialisation is required for this platform */</font> <b>return</b>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* Do some additional CPU setup to disable specified source * This service is called from hrdi_Install(). */</font><font size="+1"><i>crtx_Void_t</i> <b><font color="azure1"><a name="hrdi_DisableVector">hrdi_DisableVector</a></font></b>(<i>hrdi_ISRCB_t</i> *pISRCB_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pISRCB_a) <font color="#6920ac">/* No hadware initialisation is required for this platform */</font> <b>return</b>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font size="+1"><i>hrdi_Mask_t</i> <b><font color="azure1"><a name="hrdi_Mask">hrdi_Mask</a></font></b>(<i>hrdi_Vector_t</i> Vector_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <font color="#6920ac">/* None */</font><font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <b>return</b> (<i>hrdi_Mask_t</i>)(0x1<<(Vector_a - 1));<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* Initialise LISR stack frame. CPU specific implementation */</font><font size="+1"><i>crtx_Void_t</i> <b><font color="azure1"><a name="hrdi_MakeLisrStackFrame">hrdi_MakeLisrStackFrame</a></font></b>(<i>hrdi_ISRCB_t</i> *pLisr_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <a href="CRTX_REG_1.FIND-DEF">CRTX_REG_1</a> <i>crtx_Void_t</i> **pStack;<font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pLisr_a) <b>if</b> ((pLisr_a->Attr.pStack != <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>) && pLisr_a->Attr.StackSize > <a href="HRDI_MIN_STACK_SIZE.FIND-DEF">HRDI_MIN_STACK_SIZE</a>) { pStack = (<i>crtx_Void_t</i>**)pLisr_a->Attr.pStack; pLisr_a->pStackBase = (<i>crtx_Uint32_t</i>*)pStack; pLisr_a->pStackTop = (<i>crtx_Uint32_t</i>*) (pStack+pLisr_a->Attr.StackSize-1); *pLisr_a->pStackTop = <a href="HRDI_STACK_STAMP.FIND-DEF">HRDI_STACK_STAMP</a>; <font color="#6920ac">/* STACK STAMP */</font> *pLisr_a->pStackBase = <a href="HRDI_STACK_STAMP.FIND-DEF">HRDI_STACK_STAMP</a>; <font color="#6920ac">/* STACK STAMP */</font> *(pStack+1) = (<i>crtx_Void_t</i>*)<a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>; <font color="#6920ac">/* Old SP */</font><font color="#6920ac">#if 0 *(pStack+2) = (crtx_Void_t*)pLisr_a->pArg1; /* argument 1 */ *(pStack+3) = (crtx_Void_t*)pLisr_a->pArg0; /* argument 0 */ *(pStack+5) = (crtx_Void_t*)pLisr_a->Handler; /* LISR handler */#endif</font> <font color="#6920ac">/* 0 */</font> <font color="#6920ac">/* routine to switch stack back */</font> *(pStack+4) = (<i>crtx_Void_t</i>*)hrdi_RestoreStack; pLisr_a->pSP = (<i>crtx_Void_t</i>*)(pStack+5); <font color="#6920ac">/* individual stack required */</font> pLisr_a->Flags |= <a href="HRDI_FLAG_SWITCH_STACK.FIND-DEF">HRDI_FLAG_SWITCH_STACK</a>; } <b>else</b> { pLisr_a->pSP = <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>; <font color="#6920ac">/* perform no stack switch */</font> pLisr_a->pStackTop = pLisr_a->pStackBase = <a href="CRTX_NULL.FIND-DEF">CRTX_NULL</a>; } <b>return</b>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* prepare LISR-stack immediately before switching to LISR */</font><font color="#6920ac">/* FIX ME: must be inline */</font><font size="+1"><i>crtx_Void_t</i> <b><font color="azure1"><a name="hrdi_PrepareStack">hrdi_PrepareStack</a></font></b>(<i>hrdi_ISRCB_t</i> *pLisr_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <a href="CRTX_REG_1.FIND-DEF">CRTX_REG_1</a> <i>crtx_Void_t</i> **pStack;<font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pLisr_a) pStack = (<i>crtx_Void_t</i>**)pLisr_a->pStackBase; *(pStack+2) = (<i>crtx_Void_t</i>*)pLisr_a->pArg1; <font color="#6920ac">/* argument 1 */</font> *(pStack+3) = (<i>crtx_Void_t</i>*)pLisr_a->pArg0; <font color="#6920ac">/* argument 0 */</font> *(pStack+4) = (<i>crtx_Void_t</i>*)hrdi_RestoreStack; <font color="#6920ac">/* restore stack */</font> *(pStack+5) = (<i>crtx_Void_t</i>*)pLisr_a->Handler; <font color="#6920ac">/* LISR handler */</font> <b>return</b>;<font color="#6920ac">/************************ * EXCEPTION HANDLING * ************************/</font> <font color="#6920ac">/* None */</font>}<font color="#6920ac">/* Check LISR stack frame. CPU specific */</font><font size="+1"><i>crtx_Bool_t</i> <b><font color="azure1"><a name="hrdi_CheckStack">hrdi_CheckStack</a></font></b>(<i>hrdi_ISRCB_t</i> *pLisr_a){</font><font color="#6920ac">/********************* * LOCAL VARIABLES * *********************/</font> <a href="CRTX_REG_1.FIND-DEF">CRTX_REG_1</a> <i>crtx_Void_t</i> **pStack;<font color="#6920ac">/********************* * PROCEDURE LOGIC * *********************/</font> <a href="CRTX_ASSERT.FIND-DEF">CRTX_ASSERT</a>(pLisr_a) <b>if</b> (!(pLisr_a->Flags & <a href="HRDI_FLAG_SWITCH_STACK.FIND-DEF">HRDI_FLAG_SWITCH_STACK</a>)) <b>return</b> <a href="CRTX_FALSE.FIND-DEF">CRTX_FALSE</a>; pStack = (<i>crtx_Void_t</i>**)pLisr_a->pStackBase; <b>if</b> ((*pLisr_a->pStackBase != <a href="HRDI_STACK_STAMP.FIND-DEF">HRDI_STACK_STAMP</a>) || (*pLisr_a->pStackTop != <a href="HRDI_STACK_STAMP.FIND-DEF">HRDI_STACK_STAMP</a>)) <b>return</b> <a href="CRTX_FALSE.FIND-DEF">CRTX_FALSE</a>; <font color="#6920ac">/* STACK STAMPS corrupted */</font><font color="#6920ac">#if 0 if ((*(pStack+2) != pLisr_a->pArg1) || (*(pStack+3) != pLisr_a->pArg0)) return CRTX_FALSE; /* incorrect arguments */ if (*(pStack+5) != (crtx_Void_t*)pLisr_a->Handler) return CRTX_FALSE; /* incorrect handler */#endif</font> <b>if</b> (pLisr_a->pSP != (<i>crtx_Void_t</i>*)(pStack+5))⌨️ 快捷键说明
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