finished incorporating sd_card routines

Makefile

@@ -45,6 +45,7 @@ CSRCS= \
 
 ASRCS= \
 	$(SRCDIR)/mmu.S \
+	$(SRCDIR)/sd_card_asm.S \
 	$(SRCDIR)/exceptions.S \
 	$(SRCDIR)/supervisor.S \
 	$(SRCDIR)/ewf.S \

bas.lk.in

@@ -75,6 +75,7 @@ SECTIONS {
 	{
 		objs/BaS.o(.text)
 		/* put other routines into the same segment (RAM) as BaS.o */ 
+		objs/sd_card_asm.o(.text)
 		objs/sd_card.o(.text)
 		objs/mmu.o(.text)
 		objs/exceptions.o(.text)

sources/BaS.c

@@ -40,7 +40,7 @@ void BaS(void)
 
 	az_sectors = sd_card_init();
 		
-	if(az_sectors>0)
+	if (az_sectors > 0)
 	{
 		sd_card_idle();
 	}

sources/sd_card.c

@@ -10,8 +10,8 @@ void sd_card_idle(void)
 	__asm__ __volatile__ (
 			".extern	sd_idle\n\t"
 			"bsr		sd_idle\n\t"
-			/* input */ :
 			/* output */:
+			/* input */ :
 			/* clobber */: "a0","a1","a2","a3","a4","a5","a6",
 			              "d0","d1","d2","d3","d4","d5","d6","d7","memory"
 	);
@@ -21,6 +21,17 @@ void sd_card_idle(void)
 
 int sd_card_init(void)
 {
+	register int ret __asm__("d0");
 
+	__asm__ __volatile__ (
+		".extern		sd_init\n\t"
+		"bsr.l			sd_init\n\t"
+		/* output */: "=r" (ret)
+		/* input */ :
+		/* clobber */: "a0","a1","a2","a3","a4","a5","a6",
+		              "d1","d2","d3","d4","d5","d6","d7","memory"
+	);
+
+	return ret;
 }
 

sources/sd_card_asm.S

@@ -11,16 +11,38 @@
 #define MCF_PAD_PAR_DSPI	(__MBAR+0xA50)
 #define MCF_PSC0_PSCTB_8BIT (__MBAR+0x860C)
 #define MCF_DSPI_DMCR (__MBAR+0x8A00)
-.text
+#define MCF_SLT0_SCNT (__MBAR + 0x908)
+
+warte_10ms:
+		move.l		d0,-(sp)
+		move.l		MCF_SLT0_SCNT,d0
+		sub.l		#1320000,d0
+warte_d6:
+		cmp.l		MCF_SLT0_SCNT,d0
+		bcs			warte_d6
+		move.l		(sp)+,d0
+		rts
+
+warte_1ms:
+		move.l		d0,-(sp)
+		move.l		MCF_SLT0_SCNT,d0
+		sub.l		#132000,d0
+warte_d5:
+		cmp.l		MCF_SLT0_SCNT,d0
+		bcs			warte_d5
+		move.l		(sp)+,d0
+		rts
+		.text
 
 		.global		sd_idle
+		.global		sd_init
 
-sd_test:
+sd_init:
 		lea			MCF_PSC0_PSCTB_8BIT,a6
 		move.l   	#LONGASC('S', 'D', '-', 'A'),(a6)
 		move.l		#LONGASC('a', 'r', 'd', ' '),(a6)
 
-		move.l		#_Bas_base,a5				// basis addresse (diesen bereich brauchen wir nicht mehr!)
+		move.l		buffer,a5				// basis addresse (diesen bereich brauchen wir nicht mehr!)
 		move.l		#0x1fffffff,d0				// normal dspi
 		move.l		d0,MCF_PAD_PAR_DSPI
 		lea			MCF_DSPI_DMCR,a0
@@ -30,9 +52,9 @@ sd_test:
 		move.l		#0x082000ff,d4				// tx vorbesetzen
 		mov3q.l		#-1,dspi_dsr(a0)
 		
-		bsr.l		_wait_1ms
+		bsr.l		warte_1ms
 		move.l		#0xc00d3c00,(a0)			// 8 bit 4MHz clocken cs off
-		bsr.l		_wait_10ms
+		bsr.l		warte_10ms
 		move.l		#0x800d3c00,(a0)			// 8 bit 4MHz normal cs on
 		bsr			sd_com
 		bsr			sd_com
@@ -53,7 +75,7 @@ sd_test:
 		bsr			sd_com
 		bsr			sd_com
 		move.l		#0x802d3c00,(a0)			// 8 bit 4MHz normal cs off
-		bsr.l		_wait_10ms
+		bsr.l		warte_10ms
 
 // sd idle
 		move.l		#100,d6				// 100 versuche
@@ -411,3 +433,6 @@ sd_rcv_rd_rb:
 		bne			sd_rcv_rd_rb
 		rts
 /******************************************/
+
+			.data
+buffer:		dc.l	0, 0, 0, 0, 0, 0, 0, 0