Attachment 5967 Details for Bug 13847 – file.diff

[patch] file.diff

file.diff (text/plain), 1.99 KB, created by Tor Egge on 1999-09-20 05:20:01 UTC

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Creator: Tor Egge

Created: 1999-09-20 05:20:01 UTC

Size: 1.99 KB

patch

obsolete

>Index: i386/libi386/biosdisk.c
>===================================================================
>RCS file: /home/ncvs/src/sys/boot/i386/libi386/biosdisk.c,v
>retrieving revision 1.20.2.7
>diff -u -r1.20.2.7 biosdisk.c
>--- biosdisk.c	1999/08/29 16:20:59	1.20.2.7
>+++ biosdisk.c	1999/09/19 23:20:02
>@@ -687,18 +687,53 @@
> 		v86int();
> 	    }
> 	    
>-	    /* build request  XXX support EDD requests too */
>-	    v86.ctl = V86_FLAGS;
>-	    v86.addr = 0x13;
>-	    v86.eax = 0x200 | x;
>-	    v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
>-	    v86.edx = (hd << 8) | od->od_unit;
>-	    v86.es = VTOPSEG(xp);
>-	    v86.ebx = VTOPOFF(xp);
>-	    v86int();
>-	    result = (v86.efl & 0x1);
>-	    if (result == 0)
>+	    if (cyl > 1023) {
>+	      static unsigned short packet[8];
>+
>+	      /* Check for Extended READ */
>+	      v86.ctl = V86_FLAGS;
>+	      v86.addr = 0x13;
>+	      v86.eax = 0x4100;
>+	      v86.ebx = 0x55aa;
>+	      v86.edx = od->od_unit;
>+	      v86int();
>+
>+	      if (v86.ebx == 0xaa55 && (v86.ecx & 1) == 1) {
>+
>+		packet[0] = 0x10;
>+		packet[1] = x;
>+		packet[2] = VTOPOFF(xp);
>+		packet[3] = VTOPSEG(xp);
>+		packet[4] = dblk;
>+		packet[5] = dblk >> 16;
>+		packet[6] = 0;
>+		packet[7] = 0;
>+		/* build request  XXX support EDD requests too */
>+		v86.ctl = V86_FLAGS;
>+		v86.addr = 0x13;
>+		v86.eax = 0x4200;
>+		v86.ds = VTOPSEG(packet);
>+		v86.esi = VTOPOFF(packet);
>+		v86int();
>+		result = (v86.efl & 0x1);
>+		if (result == 0)
>+		  break;
>+	      }
>+	      result = 1;
>+	    } else {
>+	      /* build request  XXX support EDD requests too */
>+	      v86.ctl = V86_FLAGS;
>+	      v86.addr = 0x13;
>+	      v86.eax = 0x200 | x;
>+	      v86.ecx = ((cyl & 0xff) << 8) | ((cyl & 0x300) >> 2) | sec;
>+	      v86.edx = (hd << 8) | od->od_unit;
>+	      v86.es = VTOPSEG(xp);
>+	      v86.ebx = VTOPOFF(xp);
>+	      v86int();
>+	      result = (v86.efl & 0x1);
>+	      if (result == 0)
> 		break;
>+	    }
> 	}
> 	
>  	DEBUG("%d sectors from %d/%d/%d to %p (0x%x) %s", x, cyl, hd, sec - 1, p, VTOP(p), result ? "failed" : "ok");

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