2008-08-29 Pavel Roskin <proski@gnu.org>

* kern/powerpc/ieee1275/crt0.S: Rename to ...
	* kern/powerpc/ieee1275/startup.S: ... this.
	* conf/powerpc-ieee1275.rmk: Adjust for the above.
	* DISTLIST: Likewise.

kern/powerpc/ieee1275/startup.S

@@ -0,0 +1,64 @@
+/* startup.S - Startup code for the PowerPC.  */
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2003,2004,2005,2007,2008  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/symbol.h>
+#include <grub/cpu/kernel.h>
+
+.extern __bss_start
+.extern _end
+
+	.text
+	.align	2
+	.globl	start, _start
+start:
+_start:
+	b	codestart
+
+	. = EXT_C(start) + GRUB_KERNEL_CPU_PREFIX
+
+VARIABLE(grub_prefix)
+	/* to be filled by grub-mkelfimage */
+
+	/*
+	 *  Leave some breathing room for the prefix.
+	 */
+
+	. = EXT_C(start) + GRUB_KERNEL_CPU_DATA_END
+
+codestart:
+	li      2, 0
+	li      13, 0
+
+	/* Stage1 won't zero BSS for us. In other cases, why not do it again?  */
+	lis	6, (__bss_start - 4)@h
+	ori	6, 6, (__bss_start - 4)@l
+	lis	7, (_end - 4)@h
+	ori	7, 7, (_end - 4)@l
+	subf	7, 6, 7
+	srwi	7, 7, 2 /* We store 4 bytes at a time.  */
+	mtctr	7
+2:	stwu	2, 4(6) /* We know r2 is already 0 from above.  */
+	bdnz	2b
+
+	/* Store r5 in grub_ieee1275_entry_fn.  */
+	lis	9, grub_ieee1275_entry_fn@ha
+	stw	5, grub_ieee1275_entry_fn@l(9)
+
+	bl	grub_main
+1:	b	1b