buf.h62

SEED的VPM642测试程序-板级支持库

;
;  Copyright 2003 by Texas Instruments Incorporated.
;  All rights reserved. Property of Texas Instruments Incorporated.
;  Restricted rights to use, duplicate or disclose this code are
;  granted through contract.
;  
;
; "@(#) DSP/BIOS 4.90.270 12-18-03 (barracuda-o04)"
;
;  ======== buf.h62 ========
;
;

	.if ($isdefed("BUF_") = 0)  ; prevent multiple includes of this file
BUF_	.set	1

	.include std.h62
	.include obj.h62

BUF_Obj        .struct
startaddr      .word    1  ; Starting address of buffer pool
size           .word    1  ; Original size of buffer before alignment
postalignsize  .word    1  ; Size of buffer after alignment
nextfree       .word    1  ; Pointer to next free buffer
totalbuffers   .word    1  ; Total number of buffers in pool
freebuffers    .word    1  ; Number of free buffers in pool
segid          .word    1  ; Memory segment for buffer pool
BUF_A_OBJSIZE  .endstruct

	.eval	BUF_A_OBJSIZE / STD_TARGWORDMAUS, BUF_CORESIZE  ; 7 words

	.eval	OBJ_HDRSIZE + BUF_CORESIZE, BUF_OBJSIZE

;
;# ======== BUF_config ========
;  Static configuration of the BUF module
;
;#
;# Preconditions:
;#      none
;#
;# Postconditions:
;#      none
;#
;
	.asg    "", BUF_config$regs
BUF_config	.macro _enabled
	.endm


;
;# ======== BUF_init ========
;  Runtime initialization of the BUF module
;
;#
;# Preconditions: 
;#	none
;#
;# Postconditions:
;#	none
;#
;
	.asg    "", BUF_init$regs
BUF_init	.macro

	; only expand if the BUF module is configured
	.if (BUF$ = 1)
           .ref __BUF_init
 
           mvkl   __BUF_init,a4
           mvkh   __BUF_init,a4
           b      a4
           mvkl   bufstart?, b3
           mvkh   bufstart?, b3
           nop 3
bufstart?:

	.endif

	.endm

;
;# ======== BUF_startup ========
;
;#
;# Preconditions:
;#      none
;#
;# Postconditions:
;#      none
;#
	.asg    "", BUF_startup$regs
BUF_startup        .macro

	.if	BUF$NUMOF != 0
	.endif
	.endm

;
;# ======== BUF_end ========
;  Invoked at the end of all other configuration
;  declarations.
;
;#
;# Preconditions:
;#      none
;#
;# Postconditions:
;#      none
;#
;
        .asg    "", BUF_end$regs
BUF_end .macro
        .endm

;
;# ======== BUF_Obj ========
;
;  Parameters:
;             name       -  name of buffer pool object
;             size      -  size of each buffer
;             numbuff   -  number of buffers in the pool
;             align     -  alignment required for bufferpool
;             bseg      -  segment in which buffer pool has to be allocated
;             postalignsize   -  size of each buffer after alignment
;
;#
;# Preconditions:
;#      none
;#
;# Postconditions:
;#      none
;#
;

	.asg    "", BUF_Obj$regs
BUF_Obj	.macro cflag, name, id, bseg, numbuff, size, align, postalignsize

	.global	:name:
	.global	:name:$databeg


:name:$obj	.usect ".buf", OBJ_HDRSIZE * STD_TARGWORDMAUS, STD_TARGWORDMAUS

:name:		.usect ".buf", BUF_CORESIZE * STD_TARGWORDMAUS, STD_TARGWORDMAUS

	.sect	".cinit"
	.align	STD_TARGALIGN
	.word	BUF_OBJSIZE * STD_TARGWORDMAUS
	.word	:name:$obj

	; A label for this object, ":name:", will be set in OBJ_Obj
	OBJ_Obj	:name:, OBJ_BUF, BUF_CORESIZE

	.word	:name:$databeg  ; This filed is defined in linker command file
	.word	:size:          ; original buffer size before alignment
	.word	:postalignsize: ; size after alignment
	.word	:name:$databeg  ; Address of first free buffer
	.word	:numbuff:       ; Total number of buffers in pool
	.word	:numbuff:       ; Number of free buffers in pool
	.word	:bseg:          ; Memory segment of buffer pool


	.endm


	.endif		; if BUF_ is not defined