ddma.lst

au1200下的boot代码

 291:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 292:/mnt/hgfs/boot/booter/source/ddma.c ****  *     Returns :
 293:/mnt/hgfs/boot/booter/source/ddma.c ****  *      nothing
 294:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 295:/mnt/hgfs/boot/booter/source/ddma.c ****  */
 296:/mnt/hgfs/boot/booter/source/ddma.c **** void ddma_init_descriptors( DDMA_DESCRIPTOR *list, uint32 count )
 297:/mnt/hgfs/boot/booter/source/ddma.c **** {
 505              		.loc 1 297 0
 506              		.frame	$sp,48,$31		# vars= 0, regs= 7/0, args= 16, gp= 0
 507              		.mask	0x803f0000,-8
 508              		.fmask	0x00000000,0
 509              		.set	noreorder
 510              		.set	nomacro
 511              		
 512 0380 D0FFBD27 		addiu	$sp,$sp,-48
 513              	$LCFI14:
 514 0384 1C00B3AF 		sw	$19,28($sp)
 515              	$LCFI15:
 298:/mnt/hgfs/boot/booter/source/ddma.c **** 	DDMA_DESCRIPTOR *current = list;
 299:/mnt/hgfs/boot/booter/source/ddma.c **** 	int i;
 300:/mnt/hgfs/boot/booter/source/ddma.c **** 	for ( i=0; i<count-1; i++)
 516              		.loc 1 300 0
 517 0388 FFFFB324 		addiu	$19,$5,-1
 518              		.loc 1 297 0
 519 038c 2400B5AF 		sw	$21,36($sp)
 520              	$LCFI16:
 521 0390 1800B2AF 		sw	$18,24($sp)
 522              	$LCFI17:
 523 0394 1400B1AF 		sw	$17,20($sp)
 524              	$LCFI18:
 525 0398 2800BFAF 		sw	$31,40($sp)
 526              	$LCFI19:
 527 039c 2000B4AF 		sw	$20,32($sp)
 528              	$LCFI20:
 529 03a0 1000B0AF 		sw	$16,16($sp)
 530              	$LCFI21:
 531              		.loc 1 297 0
 532 03a4 21A88000 		move	$21,$4
 533              		.loc 1 298 0
 534 03a8 21888000 		move	$17,$4
 535              		.loc 1 300 0
 536 03ac 10006012 		beq	$19,$0,$L47
 537 03b0 21900000 		move	$18,$0
 538              	
 539 03b4 FF1F023C 		li	$2,536805376			# 0x1fff0000
 540 03b8 FFFF5434 		ori	$20,$2,0xffff
 541              	$LBB4:
 301:/mnt/hgfs/boot/booter/source/ddma.c **** 	{
 302:/mnt/hgfs/boot/booter/source/ddma.c **** 		DDMA_DESCRIPTOR *prev;
 303:/mnt/hgfs/boot/booter/source/ddma.c **** 
 304:/mnt/hgfs/boot/booter/source/ddma.c **** 		prev = current;
 542              		.loc 1 304 0
 543 03bc 21802002 		move	$16,$17
 544              	$L48:
 305:/mnt/hgfs/boot/booter/source/ddma.c **** 		current++;
 545              		.loc 1 305 0
 546 03c0 40003126 		addiu	$17,$17,64
GAS LISTING /tmp/ccEQxguf.s 			page 16


 306:/mnt/hgfs/boot/booter/source/ddma.c **** 
 307:/mnt/hgfs/boot/booter/source/ddma.c **** 		/* Lets make all the remaining descriptors match the first initialized one */
 308:/mnt/hgfs/boot/booter/source/ddma.c **** 		memcpy((void*)current, (void*)prev, sizeof(DDMA_DESCRIPTOR));
 547              		.loc 1 308 0
 548 03c4 21202002 		move	$4,$17
 549 03c8 21280002 		move	$5,$16
 550 03cc 0000000C 		jal	memcpy
 551 03d0 40000624 		li	$6,64			# 0x40
 552              	
 553              	$LBE4:
 554              		.loc 1 300 0
 555 03d4 01005226 		addiu	$18,$18,1
 556              	$LBB5:
 309:/mnt/hgfs/boot/booter/source/ddma.c **** 
 310:/mnt/hgfs/boot/booter/source/ddma.c **** 		prev->u.std.nxt_ptr  = VIRT_TO_NXTPTR(current);
 557              		.loc 1 310 0
 558 03d8 24103402 		and	$2,$17,$20
 559 03dc 42110200 		srl	$2,$2,5
 560              	$LBE5:
 561              		.loc 1 300 0
 562 03e0 2B185302 		sltu	$3,$18,$19
 563              	$LBB6:
 564              		.loc 1 310 0
 565 03e4 1C0002AE 		sw	$2,28($16)
 566              	$LBE6:
 567              		.loc 1 304 0
 568              		.loc 1 300 0
 569 03e8 F5FF6014 		bne	$3,$0,$L48
 570 03ec 21802002 		move	$16,$17
 571              	
 572              	$L47:
 311:/mnt/hgfs/boot/booter/source/ddma.c **** 	}
 312:/mnt/hgfs/boot/booter/source/ddma.c **** 
 313:/mnt/hgfs/boot/booter/source/ddma.c **** 	/* The last descriptor should point back around to the beginning of the ring */
 314:/mnt/hgfs/boot/booter/source/ddma.c **** 	current->u.std.nxt_ptr  = VIRT_TO_NXTPTR(list);
 573              		.loc 1 314 0
 574 03f0 FF1F023C 		li	$2,536805376			# 0x1fff0000
 575 03f4 FFFF4234 		ori	$2,$2,0xffff
 576 03f8 2410A202 		and	$2,$21,$2
 577 03fc 42110200 		srl	$2,$2,5
 578 0400 1C0022AE 		sw	$2,28($17)
 579 0404 2800BF8F 		lw	$31,40($sp)
 580 0408 2400B58F 		lw	$21,36($sp)
 581 040c 2000B48F 		lw	$20,32($sp)
 582 0410 1C00B38F 		lw	$19,28($sp)
 583 0414 1800B28F 		lw	$18,24($sp)
 584 0418 1400B18F 		lw	$17,20($sp)
 585 041c 1000B08F 		lw	$16,16($sp)
 586 0420 0800E003 		j	$31
 587 0424 3000BD27 		addiu	$sp,$sp,48
 588              	
 589              		.set	macro
 590              		.set	reorder
 591              	$LFE9:
 592              		.end	ddma_init_descriptors
 593              		.align	2
 594              		.globl	ddma_next_descriptor
GAS LISTING /tmp/ccEQxguf.s 			page 17


 595              		.ent	ddma_next_descriptor
 596              		.type	ddma_next_descriptor, @function
 597              	ddma_next_descriptor:
 598              	$LFB10:
 315:/mnt/hgfs/boot/booter/source/ddma.c **** 
 316:/mnt/hgfs/boot/booter/source/ddma.c **** #ifdef DEBUG
 317:/mnt/hgfs/boot/booter/source/ddma.c **** 	for( i=0,current=list;i<count;i++,current++)
 318:/mnt/hgfs/boot/booter/source/ddma.c **** 	{
 319:/mnt/hgfs/boot/booter/source/ddma.c **** 		printf("Descriptor %d: \n\t%08X %08X %08X %08X\n\t%08X %08X %08X  %08X\n", i, 
 320:/mnt/hgfs/boot/booter/source/ddma.c **** 			((uint32*)current)[0], ((uint32*)current)[1], ((uint32*)current)[2], ((uint32*)current)[3],	
 321:/mnt/hgfs/boot/booter/source/ddma.c **** 			((uint32*)current)[4], ((uint32*)current)[5], ((uint32*)current)[6], ((uint32*)current)[7] );
 322:/mnt/hgfs/boot/booter/source/ddma.c **** 	}
 323:/mnt/hgfs/boot/booter/source/ddma.c **** #endif
 324:/mnt/hgfs/boot/booter/source/ddma.c **** 
 325:/mnt/hgfs/boot/booter/source/ddma.c **** }
 326:/mnt/hgfs/boot/booter/source/ddma.c **** 
 327:/mnt/hgfs/boot/booter/source/ddma.c **** 
 328:/mnt/hgfs/boot/booter/source/ddma.c **** /*
 329:/mnt/hgfs/boot/booter/source/ddma.c ****  *   Function   :   ddma_next_descriptor
 330:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 331:/mnt/hgfs/boot/booter/source/ddma.c ****  *      This function find the next available descriptor in the ring for use.
 332:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 333:/mnt/hgfs/boot/booter/source/ddma.c ****  *   Parameters :
 334:/mnt/hgfs/boot/booter/source/ddma.c ****  *      channel		Pointer
 335:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 336:/mnt/hgfs/boot/booter/source/ddma.c ****  *     Returns :
 337:/mnt/hgfs/boot/booter/source/ddma.c ****  *      non-zero  	Upon finding an available descriptor
 338:/mnt/hgfs/boot/booter/source/ddma.c ****  *		NULL		Descriptor Ring is full
 339:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 340:/mnt/hgfs/boot/booter/source/ddma.c ****  */
 341:/mnt/hgfs/boot/booter/source/ddma.c **** DDMA_DESCRIPTOR * ddma_next_descriptor( void *c )
 342:/mnt/hgfs/boot/booter/source/ddma.c **** {
 599              		.loc 1 342 0
 600              		.frame	$sp,0,$31		# vars= 0, regs= 0/0, args= 0, gp= 0
 601              		.mask	0x00000000,0
 602              		.fmask	0x00000000,0
 603              		.set	noreorder
 604              		.set	nomacro
 605              		
 343:/mnt/hgfs/boot/booter/source/ddma.c **** 	int					isempty=FALSE;
 344:/mnt/hgfs/boot/booter/source/ddma.c **** 	DDMA_DESCRIPTOR		*new=NULL;
 345:/mnt/hgfs/boot/booter/source/ddma.c **** 	CHANNEL				*channel = (CHANNEL*)c;
 346:/mnt/hgfs/boot/booter/source/ddma.c **** 
 347:/mnt/hgfs/boot/booter/source/ddma.c **** 	// Is the channel enabled? 
 348:/mnt/hgfs/boot/booter/source/ddma.c **** 	if ( channel->ptr->cfg & DDMA_CHANCFG_EN )
 606              		.loc 1 348 0
 607 0428 0000828C 		lw	$2,0($4)
 608              		.loc 1 342 0
 609 042c 21388000 		move	$7,$4
 610              		.loc 1 344 0
 611 0430 21300000 		move	$6,$0
 612              		.loc 1 348 0
 613 0434 0000438C 		lw	$3,0($2)
 614 0438 01006330 		andi	$3,$3,0x1
 349:/mnt/hgfs/boot/booter/source/ddma.c **** 	{
 350:/mnt/hgfs/boot/booter/source/ddma.c **** #ifdef DEBUG
 351:/mnt/hgfs/boot/booter/source/ddma.c **** 		printf("ddma_next_descriptor: channel->dh %X\n",channel->dh); 
GAS LISTING /tmp/ccEQxguf.s 			page 18


 352:/mnt/hgfs/boot/booter/source/ddma.c **** #endif
 353:/mnt/hgfs/boot/booter/source/ddma.c **** 
 354:/mnt/hgfs/boot/booter/source/ddma.c **** #if !defined(CONFIG_EXAMPLE_AU1XIDE)
 355:/mnt/hgfs/boot/booter/source/ddma.c **** 		// AU1XIDE example source code allows one descriptor ddma operation at the last block transfer
 356:/mnt/hgfs/boot/booter/source/ddma.c **** 		// Do we have room on the ring?
 357:/mnt/hgfs/boot/booter/source/ddma.c **** 		if ( channel->dt->u.std.nxt_ptr == VIRT_TO_NXTPTR(channel->dh) )
 358:/mnt/hgfs/boot/booter/source/ddma.c **** 			return NULL;
 615              		.loc 1 358 0
 616              		.loc 1 348 0
 617 043c 18006010 		beq	$3,$0,$L50
 618 0440 21400000 		move	$8,$0
 619              	
 620              		.loc 1 357 0
 621 0444 2000848C 		lw	$4,32($4)
 622 0448 1C00E58C 		lw	$5,28($7)
 623 044c FF1F023C 		li	$2,536805376			# 0x1fff0000
 624 0450 FFFF4234 		ori	$2,$2,0xffff
 625 0454 1C00838C 		lw	$3,28($4)
 626 0458 2410A200 		and	$2,$5,$2
 627 045c 42110200 		srl	$2,$2,5
 628 0460 10006210 		beq	$3,$2,$L49
 629 0464 00000000 		nop
 630              	
 359:/mnt/hgfs/boot/booter/source/ddma.c **** #endif
 360:/mnt/hgfs/boot/booter/source/ddma.c **** 		// Check to see if the descriptor ring is empty 
 361:/mnt/hgfs/boot/booter/source/ddma.c **** 		if ( !(channel->dh->u.std.cmd0 & DDMA_DESCCMD_V) && channel->dh == channel->dt ) 
 631              		.loc 1 361 0
 632 0468 0000A28C 		lw	$2,0($5)
 362:/mnt/hgfs/boot/booter/source/ddma.c **** 			isempty = TRUE;
 363:/mnt/hgfs/boot/booter/source/ddma.c **** 
 364:/mnt/hgfs/boot/booter/source/ddma.c **** 		// If the ring is empty... then point new to the current tail... otherwise point to next descript
 365:/mnt/hgfs/boot/booter/source/ddma.c **** 		if ( isempty )
 366:/mnt/hgfs/boot/booter/source/ddma.c **** 			new = channel->dt;
 633              		.loc 1 366 0
 634              		.loc 1 361 0
 635 046c 03004004 		bltz	$2,$L53
 636 0470 21308000 		move	$6,$4
 637              	
 638 0474 0300A410 		beq	$5,$4,$L54
 639 0478 00000000 		nop
 640              	
 641              	$L53:
 367:/mnt/hgfs/boot/booter/source/ddma.c **** 		else
 368:/mnt/hgfs/boot/booter/source/ddma.c **** 		{
 369:/mnt/hgfs/boot/booter/source/ddma.c **** 			new = (DDMA_DESCRIPTOR*)( (uint32)(channel->dt->u.std.nxt_ptr)<<5);
 642              		.loc 1 369 0
 643 047c 1C00828C 		lw	$2,28($4)
 644 0480 40310200 		sll	$6,$2,5
 645              	$L54:
 370:/mnt/hgfs/boot/booter/source/ddma.c **** #ifdef DEBUG
 371:/mnt/hgfs/boot/booter/source/ddma.c **** 			printf("ddma_next_descriptor: List is not empty, new:%X\n", new);
 372:/mnt/hgfs/boot/booter/source/ddma.c **** #endif
 373:/mnt/hgfs/boot/booter/source/ddma.c **** 		}
 374:/mnt/hgfs/boot/booter/source/ddma.c **** 
 375:/mnt/hgfs/boot/booter/source/ddma.c **** 		// point to our new tail
 376:/mnt/hgfs/boot/booter/source/ddma.c **** 		channel->dt = NXTPTR_TO_VIRT(channel->ring, channel->dt);
 646              		.loc 1 376 0
GAS LISTING /tmp/ccEQxguf.s 			page 19


 647 0484 1C00828C 		lw	$2,28($4)
 648 0488 1800E38C 		lw	$3,24($7)
 649 048c 00E0043C 		li	$4,-536870912			# 0xffffffffe0000000
 650 0490 40110200 		sll	$2,$2,5
 651 0494 24186400 		and	$3,$3,$4
 652 0498 25186200 		or	$3,$3,$2
 653 049c 2000E3AC 		sw	$3,32($7)
 654              	$L50:
 377:/mnt/hgfs/boot/booter/source/ddma.c **** 	}
 378:/mnt/hgfs/boot/booter/source/ddma.c **** 	return new;
 655              		.loc 1 378 0
 656 04a0 2140C000 		move	$8,$6
 657              	$L49:
 379:/mnt/hgfs/boot/booter/source/ddma.c **** }
 658              		.loc 1 379 0
 659 04a4 0800E003 		j	$31
 660 04a8 21100001 		move	$2,$8
 661              	
 662              		.set	macro
 663              		.set	reorder
 664              	$LFE10:
 665              		.end	ddma_next_descriptor
 666              		.align	2
 667              		.globl	ddma_lit_wr
 668              		.ent	ddma_lit_wr
 669              		.type	ddma_lit_wr, @function
 670              	ddma_lit_wr:
 671              	$LFB11:
 380:/mnt/hgfs/boot/booter/source/ddma.c **** 
 381:/mnt/hgfs/boot/booter/source/ddma.c **** /*
 382:/mnt/hgfs/boot/booter/source/ddma.c ****  *   Function   :   ddma_lit_wr
 383:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 384:/mnt/hgfs/boot/booter/source/ddma.c ****  *      This function is a helper routine to place a user's buffer pointer
 385:/mnt/hgfs/boot/booter/source/ddma.c ****  *		in the descriptor. Set size attribute and ring the channel's 
 386:/mnt/hgfs/boot/booter/source/ddma.c ****  *		doorbell to begin transaction.
 387:/mnt/hgfs/boot/booter/source/ddma.c ****  *
 388:/mnt/hgfs/boot/booter/source/ddma.c ****  *   Parameters :
 389:/mnt/hgfs/boot/booter/source/ddma.c ****  *      channel		Pointer	to the ddma channel ( local struct )
 390:/mnt/hgfs/boot/booter/source/ddma.c ****  *		dst			Pointer where the data should go -- useful for MEM->MEM ddma
 391:/mnt/hgfs/boot/booter/source/ddma.c ****  *		size		Size of the data in bytes
 392:/mnt/hgfs/boot/booter/source/ddma.c ****  *