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authorDavid S. Miller <davem@davemloft.net>2009-04-13 14:41:05 -0700
committerDavid S. Miller <davem@davemloft.net>2009-04-13 14:41:05 -0700
commit83400207a07584539366f6859362db6872809a12 (patch)
treefad187f8b3bebf1b387ec42ef8143e6f4e49a256 /arch/microblaze/kernel/head.S
parent0d489ffb76de0fe804cf06a9d4d11fa7342d74b9 (diff)
parent80a04d3f2f94fb68b5df05e3ac6697130bc3467a (diff)
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts: MAINTAINERS
Diffstat (limited to 'arch/microblaze/kernel/head.S')
-rw-r--r--arch/microblaze/kernel/head.S56
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 00000000000..319dc35fc92
--- /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