microblaze_v8: assembler files head.S, entry-nommu.S, syscall_table.S

Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/kernel/head.S

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2007-2009 Michal Simek <monstr@monstr.eu>
+ * Copyright (C) 2007-2009 PetaLogix
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+#include <asm/page.h>
+
+	.text
+ENTRY(_start)
+	mfs	r1, rmsr
+	andi	r1, r1, ~2
+	mts	rmsr, r1
+
+/* save fdt to kernel location */
+/* r7 stores pointer to fdt blob */
+	beqi	r7, no_fdt_arg
+	or	r11, r0, r0 /* incremment */
+	ori	r4, r0, TOPHYS(_fdt_start) /* save bram context */
+	ori	r3, r0, (0x4000 - 4)
+_copy_fdt:
+	lw	r12, r7, r11 /* r12 = r7 + r11 */
+	sw	r12, r4, r11 /* addr[r4 + r11] = r12 */
+	addik	r11, r11, 4 /* increment counting */
+	bgtid	r3, _copy_fdt /* loop for all entries */
+	addik	r3, r3, -4 /* descrement loop */
+no_fdt_arg:
+
+	/* Initialize small data anchors */
+	la	r13, r0, _KERNEL_SDA_BASE_
+	la	r2, r0, _KERNEL_SDA2_BASE_
+
+	/* Initialize stack pointer */
+	la	r1, r0, init_thread_union + THREAD_SIZE - 4
+
+	/* Initialize r31 with current task address */
+	la	r31, r0, init_task
+
+	/*
+	 * Call platform dependent initialize function.
+	 * Please see $(ARCH)/mach-$(SUBARCH)/setup.c for
+	 * the function.
+	 */
+	la	r8, r0, machine_early_init
+	brald	r15, r8
+	nop
+
+	la	r15, r0, machine_halt
+	braid	start_kernel
+	nop