From 4a5517094dd30bb1f271403b62e23053301668e6 Mon Sep 17 00:00:00 2001
From: wdenk <wdenk>
Date: Wed, 8 Oct 2003 23:26:14 +0000
Subject: * Patch by Scott McNutt, 04 Oct 2003:   - add support for Altera
 Nios-32 CPU   - add support for Nios Cyclone Development Kit (DK-1C20)

* Patch by Steven Scholz, 29 Sep 2003:
  - A second parameter for bootm overwrites the load address for
    "Standalone Application" images.
  - bootm sets environment variable "filesize" to the resulting
    (uncompressed) data length for "Standalone Application" images
    when autostart is set to "no". Now you can do something like
       if bootm $fpgadata $some_free_ram ; then
               fpga load 0 $some_free_ram $filesize
       fi

* Patch by Denis Peter, 25 Sept 2003:
  add support for the MIP405 Rev. C board
---
 examples/Makefile |  4 ++++
 examples/nios.lds | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 examples/stubs.c  | 17 ++++++++++++++++
 3 files changed, 82 insertions(+)
 create mode 100644 examples/nios.lds

(limited to 'examples')

diff --git a/examples/Makefile b/examples/Makefile
index febc501..90d2655 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -37,6 +37,10 @@ ifeq ($(ARCH),mips)
 LOAD_ADDR = 0x80200000 -T mips.lds
 endif
 
+ifeq ($(ARCH),nios)
+LOAD_ADDR = 0x01000000 -L $(gcclibdir)/m32 -T nios.lds
+endif
+
 include $(TOPDIR)/config.mk
 
 SREC	= hello_world.srec
diff --git a/examples/nios.lds b/examples/nios.lds
new file mode 100644
index 0000000..105999f
--- /dev/null
+++ b/examples/nios.lds
@@ -0,0 +1,61 @@
+/*
+ * (C) Copyright 2003, Psyent Corporation <www.psyent.com>
+ * Scott McNutt <smcnutt@psyent.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program 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 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+
+OUTPUT_FORMAT("elf32-nios")
+OUTPUT_ARCH(nios)
+ENTRY(_start)
+
+SECTIONS
+{
+	.text :
+	{
+	  *(.text)
+	}
+        __text_end = .;
+
+        . = ALIGN(4);
+        .rodata :
+	{
+		*(.rodata)
+	}
+	__rodata_end = .;
+
+        . = ALIGN(4);
+        .data :
+	{
+		*(.data)
+	}
+	. = ALIGN(4);
+	__data_end = .;
+
+	__bss_start = .;
+        . = ALIGN(4);
+        .bss :
+	{
+		*(.bss)
+	}
+	. = ALIGN(4);
+	__bss_end = .;
+}
+
diff --git a/examples/stubs.c b/examples/stubs.c
index 9c4c51b..6ca6d78 100644
--- a/examples/stubs.c
+++ b/examples/stubs.c
@@ -61,6 +61,23 @@ gd_t *global_data;
 "	lw	$25, %1($25)\n"		\
 "	jr	$25\n"			\
 	: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x * sizeof(void *)) : "t9");
+#elif defined(CONFIG_NIOS)
+/*
+ * %g7 holds the pointer to the global_data. %g0 is call clobbered.
+ */
+#define EXPORT_FUNC(x) \
+	asm volatile (			\
+"	.globl " #x "\n"		\
+#x ":\n"				\
+"	pfx	%%hi(%0)\n"		\
+"	movi	%%g0, %%lo(%0)\n"	\
+"	add	%%g0, %%g7\n"		\
+"	ld	%%g0, [%%g0]\n"		\
+"	pfx	%1\n"			\
+"	ld	%%g0, [%%g0]\n"		\
+"	jmp	%%g0\n"			\
+"	nop	\n"			\
+	: : "i"(offsetof(gd_t, jt)), "i"(XF_ ## x) : "r0");
 #else
 #error stubs definition missing for this architecture
 #endif
-- 
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