WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] [PATCH] LBA48 support in rombios

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] [PATCH] LBA48 support in rombios
From: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
Date: Thu, 27 Dec 2007 12:53:20 +0100
Delivery-date: Thu, 27 Dec 2007 03:54:34 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Mail-followup-to: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mutt/1.5.12-2006-07-14
INT13 LBA48 support for disks bigger than 128GB. The new limit should be
2TB.

Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxx>

diff -r d048ef27cb02 tools/firmware/rombios/rombios.c
--- a/tools/firmware/rombios/rombios.c  Fri Nov 09 15:21:01 2007 +0000
+++ b/tools/firmware/rombios/rombios.c  Mon Nov 12 14:26:16 2007 +0000
@@ -2538,7 +2538,10 @@
         case ATA_TYPE_ATA:
           printf("ata%d %s: ",channel,slave?" slave":"master");
           i=0; while(c=read_byte(get_SS(),model+i++)) printf("%c",c);
-          printf(" ATA-%d Hard-Disk (%d MBytes)\n",version,(Bit16u)sizeinmb);
+          if (sizeinmb < 1UL<<16)
+            printf(" ATA-%d Hard-Disk (%04u 
MBytes)\n",version,(Bit16u)sizeinmb);
+          else
+            printf(" ATA-%d Hard-Disk (%04u 
GBytes)\n",version,(Bit16u)(sizeinmb>>10));
           break;
         case ATA_TYPE_ATAPI:
           printf("ata%d %s: ",channel,slave?" slave":"master");
@@ -2671,8 +2674,28 @@
   if (mode == ATA_MODE_PIO32) blksize>>=2;
   else blksize>>=1;
 
+  // Reset count of transferred data
+  write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
+  write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
+  current = 0;
+
+  status = inb(iobase1 + ATA_CB_STAT);
+  if (status & ATA_CB_STAT_BSY) return 1;
+
+  outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+
   // sector will be 0 only on lba access. Convert to lba-chs
   if (sector == 0) {
+    if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
+      outb(iobase1 + ATA_CB_FR, 0x00);
+      outb(iobase1 + ATA_CB_SC, (count >> 8) & 0xff);
+      outb(iobase1 + ATA_CB_SN, lba >> 24);
+      outb(iobase1 + ATA_CB_CL, 0);
+      outb(iobase1 + ATA_CB_CH, 0);
+      command |= 0x04;
+      count &= (1UL << 8) - 1;
+      lba &= (1UL << 24) - 1;
+      }
     sector = (Bit16u) (lba & 0x000000ffL);
     lba >>= 8;
     cylinder = (Bit16u) (lba & 0x0000ffffL);
@@ -2680,15 +2703,6 @@
     head = ((Bit16u) (lba & 0x0000000fL)) | 0x40;
     }
 
-  // Reset count of transferred data
-  write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
-  write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
-  current = 0;
-
-  status = inb(iobase1 + ATA_CB_STAT);
-  if (status & ATA_CB_STAT_BSY) return 1;
-
-  outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
   outb(iobase1 + ATA_CB_FR, 0x00);
   outb(iobase1 + ATA_CB_SC, count);
   outb(iobase1 + ATA_CB_SN, sector);
@@ -2814,8 +2828,28 @@
   if (mode == ATA_MODE_PIO32) blksize>>=2;
   else blksize>>=1;
 
+  // Reset count of transferred data
+  write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
+  write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
+  current = 0;
+
+  status = inb(iobase1 + ATA_CB_STAT);
+  if (status & ATA_CB_STAT_BSY) return 1;
+
+  outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
+
   // sector will be 0 only on lba access. Convert to lba-chs
   if (sector == 0) {
+    if ((count >= 1 << 8) || (lba + count >= 1UL << 28)) {
+      outb(iobase1 + ATA_CB_FR, 0x00);
+      outb(iobase1 + ATA_CB_SC, (count >> 8) & 0xff);
+      outb(iobase1 + ATA_CB_SN, lba >> 24);
+      outb(iobase1 + ATA_CB_CL, 0);
+      outb(iobase1 + ATA_CB_CH, 0);
+      command |= 0x04;
+      count &= (1UL << 8) - 1;
+      lba &= (1UL << 24) - 1;
+      }
     sector = (Bit16u) (lba & 0x000000ffL);
     lba >>= 8;
     cylinder = (Bit16u) (lba & 0x0000ffffL);
@@ -2823,15 +2857,6 @@
     head = ((Bit16u) (lba & 0x0000000fL)) | 0x40;
     }
 
-  // Reset count of transferred data
-  write_word(ebda_seg, &EbdaData->ata.trsfsectors,0);
-  write_dword(ebda_seg, &EbdaData->ata.trsfbytes,0L);
-  current = 0;
-
-  status = inb(iobase1 + ATA_CB_STAT);
-  if (status & ATA_CB_STAT_BSY) return 1;
-
-  outb(iobase2 + ATA_CB_DC, ATA_CB_DC_HD15 | ATA_CB_DC_NIEN);
   outb(iobase1 + ATA_CB_FR, 0x00);
   outb(iobase1 + ATA_CB_SC, count);
   outb(iobase1 + ATA_CB_SN, sector);

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>
  • [Xen-devel] [PATCH] LBA48 support in rombios, Samuel Thibault <=