Next try. ARC tree import. "New" Mips (spim) ARC compliant systems tree.

This tree will eventually suport viritualy all ARC compliant Mips systems,
that is all we can lay our hands on for porting/testing. It will supersede
the pica tree which will be removed shortly when this tree is functioning.

1 files changed, 129 insertions, 0 deletions

diff --git a/sys/arch/arc/stand/start.S b/sys/arch/arc/stand/start.S
new file mode 100644
index 00000000000..09114a91b7e
--- /dev/null
+++ b/sys/arch/arc/stand/start.S
@@ -0,0 +1,129 @@
+/*	$NetBSD: start.S,v 1.1 1995/01/18 06:19:01 mellon Exp $	*/
+
+/*
+ * Copyright (c) 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+/*
+ * start.S -
+ *
+ *     Contains code that is the first executed at boot time.
+ */
+
+#include <machine/regdef.h>
+#include <machine/cpu.h>
+#include <machine/asm.h>
+
+/*
+ * Frame required for the debugger (if we have any)
+ */
+#define START_FRAME	((4 * 4) + 4 + 4)
+
+	.globl	__start
+__start:
+	.set	noreorder
+#ifdef __GP_SUPPORT__
+	la      gp, _C_LABEL (_gp)
+#endif
+	la	sp, __start - START_FRAME		# Stack below program
+	sw	zero, START_FRAME - 4(sp)	# Zero out old ra for debugger
+	sw	zero, START_FRAME - 8(sp)	# Zero out old fp for debugger
+	move	s0, a0				# save argc
+	move	s1, a1				# save argv
+
+	la	a0, _C_LABEL (edata)			# clear BSS
+	la	a1, _C_LABEL (end)
+	jal	_C_LABEL(bzero)			# bzero(edata, end - edata)
+	subu	a1, a1, a0
+
+	move	a0, s0				# restore argc
+	jal	_C_LABEL(main)			# main(argc, argv)
+	move	a1, s1				# restore argv
+
+	j	_C_LABEL(Bios_Restart)		# restart...
+	nop
+
+/* dummy routine for gcc2 */
+	.globl	_C_LABEL(__main)
+_C_LABEL(__main):
+	j	ra
+	nop
+
+#define Bios_Call(Name,Offset)	\
+LEAF(Name);			\
+	lw	v0,0x80001020;	\
+	lw	v0,Offset(v0);	\
+	jr	v0	;	\
+	nop		;	\
+	END(Name)
+
+Bios_Call(Bios_Load,			0x00)
+Bios_Call(Bios_Invoke,			0x04)
+Bios_Call(Bios_Execute,			0x08)
+Bios_Call(Bios_Halt,			0x0c)
+Bios_Call(Bios_PowerDown,		0x10)
+Bios_Call(Bios_Restart,			0x14)
+Bios_Call(Bios_Reboot,			0x18)
+Bios_Call(Bios_EnterInteractiveMode,	0x1c)
+Bios_Call(Bios_Unused1,			0x20)
+Bios_Call(Bios_GetPeer,			0x24)
+Bios_Call(Bios_GetChild,		0x28)
+Bios_Call(Bios_GetParent,		0x2c)
+Bios_Call(Bios_GetConfigurationData,	0x30)
+Bios_Call(Bios_AddChild,		0x34)
+Bios_Call(Bios_DeleteComponent,		0x38)
+Bios_Call(Bios_GetComponent,		0x3c)
+Bios_Call(Bios_SaveConfiguration,	0x40)
+Bios_Call(Bios_GetSystemId,		0x44)
+Bios_Call(Bios_GetMemoryDescriptor,	0x48)
+Bios_Call(Bios_Unused2,			0x4c)
+Bios_Call(Bios_GetTime,			0x50)
+Bios_Call(Bios_GetRelativeTime,		0x54)
+Bios_Call(Bios_GetDirectoryEntry,	0x58)
+Bios_Call(Bios_Open,			0x5c)
+Bios_Call(Bios_Close,			0x60)
+Bios_Call(Bios_Read,			0x64)
+Bios_Call(Bios_GetReadStatus,		0x68)
+Bios_Call(Bios_Write,			0x6c)
+Bios_Call(Bios_Seek,			0x70)
+Bios_Call(Bios_Mount,			0x74)
+Bios_Call(Bios_GetEnvironmentVariable,	0x78)
+Bios_Call(Bios_SetEnvironmentVariable,	0x7c)
+Bios_Call(Bios_GetFileInformation,	0x80)
+Bios_Call(Bios_SetFileInformation,	0x84)
+Bios_Call(Bios_FlushAllCaches,		0x88)
+Bios_Call(Bios_TestUnicodeCharacter,	0x8c)
+Bios_Call(Bios_GetDisplayStatus,	0x90)