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;/* */
;/* OUTPUTS */
;/* */
;/* None */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* F. Gai 2000-04-03 Created initial version 1.0 */
;/* */
;/*************************************************************************/
;INT INT_Vectors_Loaded(void)
;{
EXPORT INT_Vectors_Loaded
INT_Vectors_Loaded
;
; /* Just return the loaded vectors flag. */
; return(INT_Loaded_Flag);
;
;LDR a1,[pc, #Loaded_Flag-.-8] ; Get the address
LDR a1,=Loaded_Flag
LDR a1,[a1,#0]
LDR a1,[a1,#0] ; Load current value
MOV pc,lr ; Return to caller
;}
;
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* */
;/* INT_Setup_Vector */
;/* */
;/* DESCRIPTION */
;/* */
;/* This function sets up the specified vector with the new vector */
;/* value. The previous vector value is returned to the caller. */
;/* */
;/* AUTHOR */
;/* */
;/* Gai, Feng, Watertek, Inc. */
;/* */
;/* CALLED BY */
;/* */
;/* Application */
;/* TCC_Register_LISR Register LISR for vector */
;/* */
;/* CALLS */
;/* */
;/* None */
;/* */
;/* INPUTS */
;/* */
;/* vector Vector number to setup */
;/* new Pointer to new assembly */
;/* language ISR */
;/* */
;/* OUTPUTS */
;/* */
;/* old vector contents */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* F. Gai 2000-04-03 Created initial version 1.0 */
;/* */
;/*************************************************************************/
;VOID *INT_Setup_Vector(INT vector, VOID *new)
;{
EXPORT INT_Setup_Vector
INT_Setup_Vector
;
;VOID *old_vector; /* Old interrupt vector */
;VOID **vector_table; /* Pointer to vector table */
;
; /* Calculate the starting address of the actual vector table. */
; vector_table = (VOID **) 0;
;
; /* Pickup the old interrupt vector. */
; old_vector = vector_table[vector];
;
; /* Setup the new interrupt vector. */
; vector_table[vector] = new;
;
; /* Return the old interrupt vector. */
; return(old_vector);
;
LDR a3,=EXPHDL_TBLBASE ; Get the address of our table
LDR a4,[a3,a1,LSL #2] ; Make sure we are pointing to
; the right vector
STR a2,[a3,a1,LSL #2] ; Store the new isr
MOV a1,a4 ; Setup return parameter
MOV pc,lr ; Return to caller
;}
;
;
;
;/*************************************************************************/
;/* */
;/* FUNCTION */
;/* */
;/* INT_Retrieve_Shell */
;/* */
;/* DESCRIPTION */
;/* */
;/* This function retrieves the pointer to the shell interrupt */
;/* service routine. The shell interrupt service routine calls */
;/* the LISR dispatch routine. */
;/* */
;/* AUTHOR */
;/* */
;/* Gai, Feng, Watertek, Inc. */
;/* */
;/* CALLED BY */
;/* */
;/* TCC_Register_LISR Register LISR for vector */
;/* */
;/* CALLS */
;/* */
;/* None */
;/* */
;/* INPUTS */
;/* */
;/* vector Vector number to setup */
;/* */
;/* OUTPUTS */
;/* */
;/* shell pointer */
;/* */
;/* HISTORY */
;/* */
;/* NAME DATE REMARKS */
;/* */
;/* F. Gai 2000-04-03 Created initial version 1.0 */
;/* */
;/*************************************************************************/
;VOID *INT_Retrieve_Shell(INT vector)
;{
EXPORT INT_Retrieve_Shell
INT_Retrieve_Shell
;
; /* Return the LISR Shell interrupt routine. */
; return(INT_Vectors[vector]);
;
LDR a2,=EXPHDL_TBLBASE ; Get address of our table
LDR a1,[a2,a1,LSL #2] ; Make sure we have correct isr
MOV pc,lr ; Return to caller
;}
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
INT_IRQ_Parse
;
; /* Call Prepare for IRQ interrupt processing by calling
; TCT_Interrupt_Context_Save. */
;
STMDB sp!,{a1-a4} ; Save a1-a4 on temporary IRQ stack
SUB a4,lr,#4 ; Save IRQ's lr (return address)
BL TCT_Interrupt_Context_Save ; Call context save routine
LDR a2, =I_ISPR
LDR a3,[a2,#0] ; Get current IRQ No.
TST a3,#TIMER0_MASK_BIT ; Check for timer interrupt.
BEQ NOT_TIMER_INTR
;
; /* Timer Interrupt */
;
LDR a1,=I_ISPC
MOV a2,#TIMER0_MASK_BIT ; clear pending bit
STR a2,[a1,#0]
BL TMT_Timer_Interrupt ; Call the timer interrupt processing.
B IRQ_PARSE_END
NOT_TIMER_INTR
MOV a1,#0 ; LISR 0
TEST_NEXT_LISR
MOV a3, a3, LSR #1 ; next irq bit
CMP a3,#0
ADDNE a1,a1,#1
BNE TEST_NEXT_LISR
;LDR a3, =I_ISPC
;MOV a2, #1
;MOV a2, a2, LSL a1
;STR a2, [a3,#0] ; clear pending bit
LDR a3,=INT_Pending_Bit
MOV a2,#1
MOV a2,a2,LSL a1
STR a2,[a3,#0]
BL TCC_Dispatch_LISR
LDR a3,=INT_Pending_Bit
LDR a3,[a3,#0]
LDR a2,=I_ISPC
STR a3,[a2,#0]
IRQ_PARSE_END
B TCT_Interrupt_Context_Restore
; end of IRQ_PARSE Routine
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
INT_FIQ_Parse
; /* Check for a previously enabled interrupt */
Default_ISR
SUBS pc,lr,#4
;
;/* The following section contains the remaining interrupt handlers.
; Place you Interrupt Service routine at the appropriate label.
; For IRQ, you can use Nucleus PLUS call to NU_Register_LISR
; setup up an interrupt service routine. */
;
;
Undef_Instr_ISR
B Undef_Instr_ISR
;
SWI_ISR
B SWI_ISR
;
Prefetch_Abort_ISR
B Prefetch_Abort_ISR
;
Data_Abort_ISR
B Data_Abort_ISR
;
_ISR_STARTADDRESS EQU 0xc7fff00 ;GCS6:8M DRAM
AREA RamData, DATA, READWRITE
^ _ISR_STARTADDRESS
HandleReset # 4
HandleUndef # 4
HandleSWI # 4
HandlePabort # 4
HandleDabort # 4
HandleReserved # 4
HandleIRQ # 4
HandleFIQ # 4
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