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>

1 files changed, 56 insertions, 0 deletions

diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
new file mode 100644
index 000000000000..319dc35fc922
--- /dev/null
+++ b/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