Import Tristan Gingold's ia64 port

(based on patch sent to grub-devel by Tristan in 2008-01-28)

kern/ia64/trampoline.S

@@ -0,0 +1,38 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 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/>.
+ */
+	.text
+	.psr abi64
+	.psr lsb
+	.lsb
+	
+	.proc __ia64_trampoline
+	.global __ia64_trampoline
+__ia64_trampoline:
+	// Read address of the real descriptor
+	ld8 r2=[r1],8
+	;;
+	// Read chain
+	ld8 r15=[r1]
+	// Read pc
+	ld8 r3=[r2],8
+	;;
+	// Read gp
+	ld8 r1=[r2]
+	mov b6=r3
+	br.many b6
+	.endp __ia64_trampoline