[microblaze-uclinux] [PATCH 15/56] microblaze_v2: head.S + linker script

[monstr@xxxxxxxxx]

From: Michal Simek <monstr@xxxxxxxxx>


Signed-off-by: Michal Simek <monstr@xxxxxxxxx>
---
 arch/microblaze/kernel/head.S        |   40 +++++++++
 arch/microblaze/kernel/vmlinux.lds.S |  145 ++++++++++++++++++++++++++++++++++
 2 files changed, 185 insertions(+), 0 deletions(-)
 create mode 100644 arch/microblaze/kernel/head.S
 create mode 100644 arch/microblaze/kernel/vmlinux.lds.S

diff --git a/arch/microblaze/kernel/head.S b/arch/microblaze/kernel/head.S
new file mode 100644
index 0000000..8ca148b
--- /dev/null
+++ b/arch/microblaze/kernel/head.S
@@ -0,0 +1,40 @@
+/*
+ * arch/microblaze/kernel/head.S
+ *
+ * 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.
+ *
+ * Copyright (C) 2007 Michal Simek <monstr@xxxxxxxxx>
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+#include <linux/linkage.h>
+#include <asm/thread_info.h>
+
+	.text
+ENTRY(_start)
+	mfs	r1, rmsr
+	andi	r1, r1, ~2
+	mts	rmsr, r1
+
+	/* 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
diff --git a/arch/microblaze/kernel/vmlinux.lds.S b/arch/microblaze/kernel/vmlinux.lds.S
new file mode 100644
index 0000000..8940f1f
--- /dev/null
+++ b/arch/microblaze/kernel/vmlinux.lds.S
@@ -0,0 +1,145 @@
+/*
+ * arch/microblaze/kernel/vmlinux.lds.S
+ *
+ * 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.
+ *
+ * Copyright (C) 2006 Atmark Techno, Inc.
+ */
+
+OUTPUT_FORMAT("elf32-microblaze", "elf32-microblaze", "elf32-microblaze")
+OUTPUT_ARCH(microblaze)
+ENTRY(_start)
+
+#include <linux/autoconf.h>
+#include <asm-generic/vmlinux.lds.h>
+
+jiffies = jiffies_64 + 4;
+
+SECTIONS {
+	. = CONFIG_KERNEL_BASE_ADDR;
+
+	.text : {
+		_text = . ;
+		_stext = . ;
+		TEXT_TEXT
+		SCHED_TEXT
+		LOCK_TEXT
+		. = ALIGN (4) ;
+		_etext = . ;
+	}
+
+	. = ALIGN(16);
+	RODATA
+
+	/* sdata2 section can go anywhere, but must be word aligned
+	 and SDA2_BASE must point to the middle of it */
+	.sdata2 : {
+		_ssrw = .;
+		. = ALIGN(0x8);
+		*(.sdata2)
+	. = ALIGN(8);
+	_essrw = .;
+	_ssrw_size = _essrw - _ssrw;
+	_KERNEL_SDA2_BASE_ = _ssrw + (_ssrw_size / 2);
+	}
+
+	_sdata = . ;
+	.data ALIGN (0x4) : {
+		DATA_DATA
+	}
+	. = ALIGN(32);
+	.data.cacheline_aligned : { *(.data.cacheline_aligned) }
+	_edata = . ;
+
+	/* The initial task */
+	. = ALIGN(8192);
+	.data.init_task : { *(.data.init_task) }
+
+	/* Under the microblaze ABI, .sdata and .sbss must be contiguous */
+	. = ALIGN(8);
+	.sdata : {
+		_ssro = .;
+		*(.sdata)
+	}
+
+	.sbss :	{
+		_ssbss = .;
+		*(.sbss)
+		_esbss = .;
+		_essro = .;
+		_ssro_size = _essro - _ssro ;
+		_KERNEL_SDA_BASE_ = _ssro + (_ssro_size / 2) ;
+	}
+
+	. = ALIGN(16);
+	__start___ex_table = .;
+	__ex_table : { *(__ex_table) }
+	__stop___ex_table = .;
+
+	__init_begin = .;
+
+	. = ALIGN(4096);
+	.init.text : {
+		_sinittext = . ;
+		*(.init.text)
+		*(.exit.text)
+		*(.exit.data)
+		_einittext = .;
+	}
+
+	.init.data : { *(.init.data) }
+
+	. = ALIGN(4);
+	.init.ivt : {
+		__ivt_start = .;
+		*(.init.ivt)
+		__ivt_end = .;
+	}
+
+	.init.setup : {
+		__setup_start = .;
+		*(.init.setup)
+		__setup_end = .;
+	}
+
+	.initcall.init : {
+		__initcall_start = .;
+		INITCALLS
+		__initcall_end = .;
+	}
+
+	.con_initcall.init : {
+		__con_initcall_start = .;
+		*(.con_initcall.init)
+		__con_initcall_end = .;
+	}
+
+	__init_end_before_initramfs = .;
+
+	.init.ramfs ALIGN(4096) : {
+		__initramfs_start = .;
+		*(.init.ramfs)
+		__initramfs_end = .;
+		. = ALIGN(4);
+		LONG(0);
+		. = ALIGN(4096);/* Pad init.ramfs up to page boundary, so
+				that __init_end == __bss_start. This will
+				make image.elf consistent with the image.bin */
+	}
+
+	__init_end = .;
+
+	.bss ALIGN (4096) : {
+		__bss_start = . ;
+			*(.bss*)
+			*(COMMON)
+		. = ALIGN (4) ;
+		__bss_stop = . ;
+		_ebss = . ;
+	}
+	. = ALIGN(4096);
+	_end = .;
+}
+
-- 
1.5.4.GIT

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