CVS: blob/src/blob linux.c,1.16,1.17

[Erik M. <er...@us...>]

Update of /cvsroot/blob/blob/src/blob
In directory sc8-pr-cvs1:/tmp/cvs-serv17633/src/blob

Modified Files:
	linux.c 
Log Message:
Fix the physical ramdisk location bug by issueing an ATAG_INITRD2 node.
The comment tells the whole story.


Index: linux.c
===================================================================
RCS file: /cvsroot/blob/blob/src/blob/linux.c,v
retrieving revision 1.16
retrieving revision 1.17
diff -u -d -r1.16 -r1.17
--- linux.c	24 Jan 2003 09:31:42 -0000	1.16
+++ linux.c	7 Feb 2003 02:46:44 -0000	1.17
@@ -179,6 +179,23 @@
 	params->u.initrd.size = RAMDISK_FLASH_LEN;
 
 	params = tag_next(params);
+
+	/* Uhoh, we got it all wrong. ATAG_INITRD takes a *virtual* address
+	 * not a physical address, so it nicely breaks on PXA machines.
+	 * This was fixed in linux-2.4.18-rmk6, which added the
+	 * ATAG_INITRD2 node. This one really takes a physical address.
+	 * Pre 2.4.18-rmk6 SA11x0 kernels will just ignore this node and
+	 * skip over it. Post 2.4.18-rmk6 kernels will parse both the
+	 * INITRD and the INITRD2 node, but the latter will supersede
+	 * the former and everything will be all right. -- Erik
+	 */
+	params->hdr.tag = ATAG_INITRD2;
+	params->hdr.size = tag_size(tag_initrd);
+
+	params->u.initrd.start = RAMDISK_RAM_BASE;
+	params->u.initrd.size = RAMDISK_FLASH_LEN;
+
+	params = tag_next(params);
 }