CVS: blob/src/blob chain.S,1.1,1.2

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

Update of /cvsroot/blob/blob/src/blob
In directory usw-pr-cvs1:/tmp/cvs-serv14366

Modified Files:
	chain.S 
Log Message:
- Use BLOB_ABS_BASE_ADDR to figure out where the segond stage loader should
  be loaded
- Use a trick to let bootldr think that blob-chain is a linux kernel image
  so it loads us at the correct position in memory
- The copy size is only 64K instead of 128K


Index: chain.S
===================================================================
RCS file: /cvsroot/blob/blob/src/blob/chain.S,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -d -r1.1 -r1.2
--- chain.S	2001/10/28 20:39:37	1.1
+++ chain.S	2001/11/04 23:12:50	1.2
@@ -45,6 +45,18 @@
 	sub	r0, pc, #8
 	str	r0, START
 
+#ifdef H3600
+	/* this is a hack to be able to chain load blob from
+	 * bootldr. bootldr checks if it can find the linux zImage
+	 * magic value at the ninth word of an image, so we just put
+	 * it there.
+	 */
+	b	led
+.org (_start + 9 * 4)
+	.word	0x016f2818
+led:
+#endif
+
 	/* init LED */
 	bl	ledinit
 
@@ -63,10 +75,9 @@
 	ldr	r0, START
 
 	/* relocate the second stage loader */
-	add	r2, r0, #(128 * 1024)	/* blob is 128kB */
+	add	r2, r0, #(64 * 1024)	/* blob maximum size is 64kB */
 	add	r0, r0, #0x400		/* skip first 1024 bytes */
-	ldr	r1, MEM_START
-	add	r1, r1, #0x400		/* skip over here as well */
+	ldr	r1, BLOB_START
 
 	/* r0 = source address
 	 * r1 = target address
@@ -86,10 +97,9 @@
 
 
 	/* blob is copied to ram, so jump to it */
-	ldr	r0, MEM_START
-	add	r0, r0, #0x400
+	ldr	r0, BLOB_START
 	mov	pc, r0
 
 	
 START:		.word	0x00000000
-MEM_START:	.word	MEMORY_START
+BLOB_START:	.word	BLOB_ABS_BASE_ADDR