bsps: Move start files to bsps

This patch is a part of the BSP source reorganization.

Update #3285.

6 files changed, 1597 insertions, 0 deletions

diff --git a/bsps/mips/csb350/start/start.S b/bsps/mips/csb350/start/start.S
new file mode 100644
index 0000000000..9aea3f4cae
--- /dev/null
+++ b/bsps/mips/csb350/start/start.S
@@ -0,0 +1,122 @@
+/*
+ * start.S -- startup file for Cogent CSB350 Au1100 based board
+ *
+ *  Copyright (c) 2005 by Cogent Computer Systems
+ *  Written by Jay Monkman <jtm@lopingdog.com>
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.org/license/LICENSE.
+ *
+ */
+
+#include <rtems/asm.h>
+#include <bsp/regs.h>
+
+	.text
+	.align	2
+
+/* Without the following nop, GDB thinks _start is a data variable.
+ * This is probably a bug in GDB in handling a symbol that is at the
+ * start of the .text section.
+ */
+	nop
+
+	.globl	_start
+	.ent	_start
+_start:
+	.set	noreorder
+
+	/* Get the address of start into $5 in a position independent
+	 * fashion. This lets us know whether we have been relocated or not.
+	 */
+	$LF1 = . + 8
+	bal     $LF1
+	nop
+_branch:
+	move	$5, $31			/* $5 == where are we */
+	li	$6, 0x8800000c		/* $6 == where we want to be */
+
+	li	v0, SR_CU1|SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+	mtc0	zero, C0_CAUSE
+
+1:
+	li	v0, SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+2:
+/* Fix high bits, if any, of the PC so that exception handling
+   doesn't get confused.  */
+	la v0, 3f
+	jr	v0
+	nop
+3:
+	la gp, _gp			/* set the global data pointer */
+	.end _start
+
+/*
+ * zero out the bss section.
+ */
+	.globl	zerobss
+	.ent	zerobss
+zerobss:
+	la v0, _fbss
+	la v1, _end
+3:
+	sw	zero,0(v0)
+	bltu	v0,v1,3b
+	addiu	v0,v0,4			/* executed in delay slot */
+
+	la	t0, _stack_init		/* initialize stack so we */
+	/* We must subtract 24 bytes for the 3 8 byte arguments to main, in
+	   case main wants to write them back to the stack.  The caller is
+	   supposed to allocate stack space for parameters in registers in
+	   the old MIPS ABIs.  We must do this even though we aren't passing
+	   arguments, because main might be declared to have them.
+
+	   Some ports need a larger alignment for the stack, so we subtract
+	   32, which satisifes the stack for the arguments and keeps the
+	   stack pointer better aligned.  */
+	subu	t0,t0,32
+	move	sp,t0			/* set stack pointer */
+	.end	zerobss
+
+	.globl	exit .text
+	.globl	init
+	.ent	init
+init:
+
+	move	a0,zero			/* set command line to 0 */
+	jal	boot_card		/* call the program start function */
+	nop
+
+	/* fall through to the "exit" routine */
+	jal	_sys_exit		/* call libc exit to run the G++ */
+					/* destructors */
+	move	a0,v0			/* pass through the exit code */
+	.end	init
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+	.globl	_sys_exit
+	.ent _sys_exit
+_sys_exit:
+7:
+#ifdef GCRT0
+	jal	_mcleanup
+	nop
+#endif
+	/* break inst. can cope with 0xfffff, but GAS limits the range: */
+	break	1023
+	nop
+	b	7b			/* but loop back just in-case */
+	nop
+	.end _sys_exit
+
+/* EOF crt0.S */
diff --git a/bsps/mips/hurricane/start/start.S b/bsps/mips/hurricane/start/start.S
new file mode 100644
index 0000000000..e3d97cd167
--- /dev/null
+++ b/bsps/mips/hurricane/start/start.S
@@ -0,0 +1,339 @@
+/*
+
+Based upon IDT provided code with the following release:
+
+This source code has been made available to you by IDT on an AS-IS
+basis. Anyone receiving this source is licensed under IDT copyrights
+to use it in any way he or she deems fit, including copying it,
+modifying it, compiling it, and redistributing it either with or
+without modifications.  No license under IDT patents or patent
+applications is to be implied by the copyright license.
+
+Any user of this software should understand that IDT cannot provide
+technical support for this software and will not be responsible for
+any consequences resulting from the use of this software.
+
+Any person who transfers this source code or any derivative work must
+include the IDT copyright notice, this paragraph, and the preceeding
+two paragraphs in the transferred software.
+
+COPYRIGHT IDT CORPORATION 1996
+LICENSED MATERIAL - PROGRAM PROPERTY OF IDT
+*/
+
+/*************************************************************************
+**
+** Copyright 1991-95 Integrated Device Technology, Inc.
+**	All Rights Reserved
+**
+**************************************************************************/
+
+
+#include <rtems/mips/iregdef.h>
+#include <rtems/mips/idtcpu.h>
+#include <rtems/asm.h>
+
+#include <bsp.h>
+
+#if 0
+	.extern _fdata,4		/* this is defined by the linker */
+	.extern _edata,4		/* this is defined by the linker */
+	.extern _idata,4		/* this is defined by the linker */
+#endif
+	.extern _fbss,4		  /* this is defined by the linker */
+	.extern end,4		  /* this is defined by the linker */
+
+	.lcomm sim_mem_cfg_struct,12
+
+	.text
+
+/* For the V3 Eval board, we can safely assume that we have
+  at least 16 megabytes of RAM */
+#define HARD_CODED_MEM_SIZE 0x1000000
+
+#define TMP_STKSIZE  1024
+
+/*
+** P_STACKSIZE is the size of the Prom Stack.
+** the prom stack grows downward
+*/
+#define	P_STACKSIZE	0x2000   /* sets stack size to 8k */
+
+/**************************************************************************
+**
+**  start - Typical standalone start up code required for R3000/R4000
+**
+**
+**	1)  Initialize the STATUS Register
+**		a) Clear parity error bit
+**		b) Set co_processor 1 usable bit ON
+**		c) Clear all IntMask Enables
+**		d) Set kernel/disabled mode
+**	2)  Initialize Cause Register
+**		a)  clear software interrupt bits
+**	3)  Determine FPU installed or not
+**		if not, clear CoProcessor 1 usable bit
+**	4)  Clear bss area
+**	5)  MUST allocate temporary stack until memory size determined
+**	    It MUST be uncached to prevent overwriting when caches are cleared
+**	6)  Install exception handlers
+**	7)  Determine memory and cache sizes
+**	8)  Establish permanent stack (cached or uncached as defined by bss)
+**	9)  Flush Instruction and Data caches
+** 	10)  If there is a Translation Lookaside Buffer, Clear the TLB
+** 	11)  Execute initialization code if the IDT/c library is to be used
+**
+** 	12)  Jump to user's "main()" (boot_card() for RTEMS)
+** 	13)  Jump to promexit
+**
+**	IDT/C 5.x defines _R3000, IDT/C 6.x defines _R4000 internally.
+**	This is used to mark code specific to R3xxx or R4xxx processors.
+**	IDT/C 6.x defines __mips to be the ISA level for which we're
+**	generating code. This is used to make sure the stack etc. is
+**	double word aligned, when using -mips3 (default) or -mips2,
+**	when compiling with IDT/C6.x
+**
+***************************************************************************/
+
+FRAME(start,sp,0,ra)
+
+	.set	noreorder
+#if __mips_fpr == 64
+	li	v0,SR_CU1|SR_FR|SR_DE 	/* initally clear ERL, enable FPU with 64 bit regs, disable cache errors */
+#else
+	li	v0,SR_CU1|SR_DE	 	/* initally clear ERL, enable FPU with 32 bit regs, disable cache errors */
+#endif
+
+	mtc0	v0,C0_SR		/* clr IntMsks/ kernel/disabled mode */
+	nop
+	mtc0	zero,C0_CAUSE		/* clear software interrupts */
+	nop
+
+	la	t0,0xBE200000		/* on Hurricane board, enable interrupt output signal from UART ch. B */
+	li	t1,0x8			/* UART INT B signal is left tri-state'd after reset, this results in processor interrupt signal being driven active low */
+	sw	t1,0x10(t0)
+
+	li	v0,CFG_C_NONCOHERENT	# initialise default cache mode
+	mtc0	v0,C0_CONFIG
+
+/*
+**	check to see if an fpu is really plugged in
+*/
+	li	t3,0xaaaa5555		/*  put a's and 5's in t3	*/
+	mtc1	t3,fp0			/* try to write them into fp0   */
+	mtc1	zero,fp1		/* try to write zero in fp	*/
+	mfc1	t0,fp0
+	mfc1	t1,fp1
+	nop
+	bne	t0,t3,1f		/* branch if no match  */
+	nop
+	bne	t1,zero,1f		/* double check for positive id   */
+	nop
+	/* We have a FPU. clear fcsr */
+	ctc1	zero, fcr31
+	j	2f			/* status register already correct  */
+	nop
+1:
+        li      v0,SR_DE	 		/* clear ERL and disable FPA */
+
+	mtc0	v0, C0_SR		/* reset status register */
+2:
+	la  	gp, _gp
+
+#if 0
+					/* Initialize data sections from "rom" copy */
+	la	t0,_idata		/* address of initialization data (copy of data sections placed in ROM) */
+	la	t1,_fdata		/* start of initialized data section */
+	la	t2,_edata		/* end of initialized data section */
+3:
+	lw	t3,0(t0)
+	sw	t3,0(t1)
+	addiu	t1,t1,4
+	bne	t1,t2,3b
+	addiu	t0,t0,4
+#endif
+
+	 				/* clear bss before using it */
+	la	v0,_fbss		/* start of bss */
+	la	v1,end 			/* end of bss */
+4:	sw	zero,0(v0)
+	bltu	v0,v1,4b
+	add	v0,4
+
+
+/************************************************************************
+**
+** 	Temporary Stack - needed to  handle stack saves until
+**			  memory size is determined and permanent stack set
+**
+**			  MUST be uncached to avoid confusion at cache
+**			       switching during memory sizing
+**
+*************************************************************************/
+	/* For MIPS 3, we need to be sure that the stack is aligned on a
+	 * double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 11f   /* Last three bits Zero, already aligned */
+	nop
+	add	v0, 4
+11:
+
+	or	v0, K1BASE		/* switch to uncached */
+	add	v1, v0, TMP_STKSIZE 	/* end of bss + length of tmp stack */
+	sub	v1, v1, (4*4)		/* overhead */
+	move	sp, v1			/* set sp to top of stack */
+4:	sw	zero, 0(v0)
+	bltu	v0, v1, 4b		/* clear out temp stack */
+	add	v0, 4
+
+/* 	jal	init_exc_vecs */		/* install exception handlers */
+/*	nop */				/* MUST do before memory probes */
+
+					/* Force processor into uncached space during memory/cache probes */
+	la	v0, 5f
+	li	v1, K1BASE
+	or	v0, v1
+	j	v0
+	nop
+5:
+
+	li	a0, HARD_CODED_MEM_SIZE	/* Set memory size global */
+	jal	set_memory_size
+	nop
+
+	la	a0, sim_mem_cfg_struct
+	jal	get_mem_conf		/* Make call to get mem size */
+	nop
+	la	a0, sim_mem_cfg_struct
+	lw	a0, 0(a0)		/* Get memory size from struct */
+
+	jal	config_cache		/* determine size of D & I caches */
+	nop
+
+	move	v0, a0			/* mem_size */
+
+	/* For MIPS 3, we need to be sure that the stack (and hence v0
+	 * here) is aligned on a double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 12f   /* Last three bits Zero, already aligned */
+	nop
+	subu	v0, 4	/* mem_size was not aligned on doubleword bdry????*/
+12:
+
+
+
+/**************************************************************************
+**
+**  Permanent Stack - now know top of memory, put permanent stack there
+**
+***************************************************************************/
+
+	la	t2, _fbss		/* cache mode as linked */
+	and	t2, 0xF0000000		/* isolate segment */
+	la	t1, 6f
+	j	t1			/* back to original cache mode */
+	nop
+6:
+	or 	v0, t2			/* stack back to original cache mode */
+	addiu   v0,v0,-16		/* overhead */
+	move	sp, v0			/* now replace count w top of memory */
+	move	v1, v0
+	subu	v1, P_STACKSIZE 	/* clear requested stack size */
+
+7:	sw	zero, 0(v1)		/* clear P_STACKSIZE  stack */
+	bltu	v1,v0,7b
+	add	v1, 4
+	.set	reorder
+
+/* FIX THIS - This corrupts memory spaces */
+/*	jal	flush_cache_nowrite	*/	/* flush Data & Instruction caches */
+
+/*	jal	mon_flush_cache		*/
+
+/**************************************************************************
+**
+**	If this chip supports a Translation Lookaside Buffer, clear it
+**
+***************************************************************************/
+
+	.set	noreorder
+	mfc0	t1,  C0_SR		/* look at Status Register */
+	nop
+	.set 	reorder
+
+	jal	init_tlb		/* clear the tlb */
+
+/* Force processor into cached instruction space for rest of initialization */
+#if 0
+	la	t0, 1f
+	li	t1, K0BASE		/* force into cached space */
+	or	t0, t1
+	j	t0
+	nop
+1:
+#endif
+
+/************************************************************************
+**
+**  Initialization required if using IDT/c or libc.a, standard C Lib
+**
+**  can SKIP if not necessary for application
+**
+************************************************************************/
+8:
+
+/* FIX THIS - Need the pmon equivalent
+	jal	idtsim_init_sbrk
+	jal	idtsim_init_file
+*/
+
+/***********************  END I/O initialization **********************/
+
+
+	move	a0,zero		/* Set command line passed to main */
+	jal	boot_card
+	nop
+
+	# jump to the "exit" routine
+	jal	idtsim__exit
+	move	a0,v0				# pass through the exit code
+
+
+	# FIX THIS - Need the pmon equivalent
+	# jal	idtsim_promexit
+
+1:
+	beq	zero,zero,1b
+	nop
+
+ENDFRAME(start)
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+FRAME(_sys_exit,sp,0,ra)
+
+	break	1023
+	nop
+13:
+	b	13b				# but loop back just in-case
+	nop
+
+ENDFRAME(_sys_exit)
+
+
+
+	.globl	__sizemem
+	.ent	__sizemem
+__sizemem:
+	li	v0,HARD_CODED_MEM_SIZE
+	j	ra
+	nop
+	.end	__sizemem
diff --git a/bsps/mips/jmr3904/start/start.S b/bsps/mips/jmr3904/start/start.S
new file mode 100644
index 0000000000..92c0ddd956
--- /dev/null
+++ b/bsps/mips/jmr3904/start/start.S
@@ -0,0 +1,196 @@
+/*
+ * start.S -- startup file for JMR3904 BSP based upon crt0.S from
+ * newlib-1.8.2/libgloss/mips and adapted for RTEMS.
+ *
+ * crt0.S -- startup file for MIPS.
+ *
+ * Copyright (c) 1995, 1996, 1997 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include <rtems/asm.h>
+#include <bsp/regs.h>
+
+#ifdef __mips16
+/* This file contains 32 bit assembly code.  */
+	.set nomips16
+#endif
+
+/* This is for referencing addresses that are not in the .sdata or
+   .sbss section under embedded-pic, or before we've set up gp.  */
+#ifdef __mips_embedded_pic
+# ifdef __mips64
+#  define LA(t,x) la t,x-PICBASE ; daddu t,s0,t
+# else
+#  define LA(t,x) la t,x-PICBASE ; addu t,s0,t
+# endif
+#else /* __mips_embedded_pic */
+# define LA(t,x) la t,x
+#endif /* __mips_embedded_pic */
+
+	.text
+	.align	2
+
+/* Without the following nop, GDB thinks _start is a data variable.
+ * This is probably a bug in GDB in handling a symbol that is at the
+ * start of the .text section.
+ */
+	nop
+
+	.globl	_start
+	.ent	_start
+_start:
+	.set	noreorder
+	/* Get the address of start into $5 in a position independent fashion.
+	** This lets us know whether we have been relocated or not.
+	*/
+	$LF1 = . + 8
+	bal     $LF1
+	nop
+_branch:
+	move	$5, $31				# $5 == where are we
+	li	$6, 0x8800000c			# $6 == where we want to be
+/*	#la      $6,_branch */
+	beq	$5, $6, _start_in_ram
+	nop
+	/* relocate the code from EEPROM to RAM */
+        la	$7, _edata
+relocate:
+	lw	$8, ($5)			# $8 = *EEPROM
+	addu	$5, $5, 4			# EEPROM++
+        sw      $8, ($6)			# *RAM = $8
+	addu	$6, $6, 4			# RAM++
+	bne	$6, $7, relocate		# copied all the way to edata?
+	nop
+	la	$6, _start_in_ram
+	jr	$6
+	nop
+	.end _start
+
+	.globl	_start_in_ram
+	.ent _start_in_ram
+_start_in_ram:
+	nop
+
+#ifdef __mips_embedded_pic
+	PICBASE = .+8
+        bal	PICBASE
+	nop
+	move	s0,$31
+#endif
+
+	li	v0, SR_CU1|SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+	mtc0	zero, C0_CAUSE
+
+/* Check for FPU presence */
+#ifndef __mips_soft_float
+/* This doesn't work if there is no FPU.  We get illegal instruction
+   exceptions.  */
+	li	t2,0xAAAA5555
+	mtc1	t2,fp0		/* write to FPR 0 */
+	mtc1	zero,fp1	/* write to FPR 1 */
+	mfc1	t0,fp0
+	mfc1	t1,fp1
+	nop
+	bne	t0,t2,1f	/* check for match */
+	nop
+	bne	t1,zero,1f	/* double check */
+	nop
+#ifndef __mips64  /* Clear the FR bit */
+	li	v0, SR_CU1|SR_PE|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+#endif
+	j	2f
+	nop
+#endif
+1:
+	li	v0, SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+2:
+/* Fix high bits, if any, of the PC so that exception handling
+   doesn't get confused.  */
+	LA (v0, 3f)
+	jr	v0
+	nop
+3:
+	LA (gp, _gp)				# set the global data pointer
+	.end _start_in_ram
+
+/*
+ * zero out the bss section.
+ */
+	.globl	zerobss
+	.ent	zerobss
+zerobss:
+	LA (v0, _fbss)
+	LA (v1, _end)
+3:
+	sw	zero,0(v0)
+	bltu	v0,v1,3b
+	addiu	v0,v0,4				# executed in delay slot
+
+	la	t0, _stack_init			# initialize stack so we
+	/* We must subtract 24 bytes for the 3 8 byte arguments to main, in
+	   case main wants to write them back to the stack.  The caller is
+	   supposed to allocate stack space for parameters in registers in
+	   the old MIPS ABIs.  We must do this even though we aren't passing
+	   arguments, because main might be declared to have them.
+
+	   Some ports need a larger alignment for the stack, so we subtract
+	   32, which satisifes the stack for the arguments and keeps the
+	   stack pointer better aligned.  */
+	subu	t0,t0,32
+	move	sp,t0				# set stack pointer
+	.end	zerobss
+
+	.globl	exit .text
+	.globl	init
+	.ent	init
+init:
+
+	move	a0,zero				# set command line to 0
+	jal	boot_card			# call the program start function
+	nop
+
+	/* fall through to the "exit" routine */
+	jal	_sys_exit			/* call libc exit to run the G++ */
+						/* destructors */
+	move	a0,v0				/* pass through the exit code */
+	.end	init
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+	.globl	bsp_reset
+bsp_reset:
+	.globl	_sys_exit
+	.ent _sys_exit
+_sys_exit:
+7:
+#ifdef GCRT0
+	jal	_mcleanup
+	nop
+#endif
+	/* break instruction can cope with 0xfffff, but GAS limits the range: */
+	break	1023
+	nop
+	b	7b				# but loop back just in-case
+	nop
+	.end _sys_exit
+
+/* EOF crt0.S */
diff --git a/bsps/mips/malta/start/start.S b/bsps/mips/malta/start/start.S
new file mode 100644
index 0000000000..8f5f96489f
--- /dev/null
+++ b/bsps/mips/malta/start/start.S
@@ -0,0 +1,221 @@
+/*
+ * start.S -- startup file for JMR3904 BSP based upon crt0.S from
+ * newlib-1.8.2/libgloss/mips and adapted for RTEMS.
+ *
+ * crt0.S -- startup file for MIPS.
+ *
+ * Copyright (c) 1995, 1996, 1997 Cygnus Support
+ *
+ * The authors hereby grant permission to use, copy, modify, distribute,
+ * and license this software and its documentation for any purpose, provided
+ * that existing copyright notices are retained in all copies and that this
+ * notice is included verbatim in any distributions. No written agreement,
+ * license, or royalty fee is required for any of the authorized uses.
+ * Modifications to this software may be copyrighted by their authors
+ * and need not follow the licensing terms described here, provided that
+ * the new terms are clearly indicated on the first page of each file where
+ * they apply.
+ */
+
+#include <rtems/asm.h>
+#include <bsp/regs.h>
+
+#include <bsp.h>
+
+#ifdef __mips16
+/* This file contains 32 bit assembly code.  */
+	.set nomips16
+#endif
+
+/* This is for referencing addresses that are not in the .sdata or
+   .sbss section under embedded-pic, or before we've set up gp.  */
+#ifdef __mips_embedded_pic
+# ifdef __mips64
+#  define LA(t,x) la t,x-PICBASE ; daddu t,s0,t
+# else
+#  define LA(t,x) la t,x-PICBASE ; addu t,s0,t
+# endif
+#else /* __mips_embedded_pic */
+# define LA(t,x) la t,x
+#endif /* __mips_embedded_pic */
+
+	.text
+	.align	2
+
+/* Without the following nop, GDB thinks _start is a data variable.
+ * This is probably a bug in GDB in handling a symbol that is at the
+ * start of the .text section.
+ */
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	.globl	_start
+	.ent	_start
+_start:
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	nop
+	.set	noreorder
+	/* Get the address of start into $5 in a position independent fashion.
+	** This lets us know whether we have been relocated or not.
+	*/
+	$LF1 = . + 8
+	bal     $LF1
+	nop
+_branch:
+#if 0
+	move	$5, $31				# $5 == where are we
+	li	$6, 0x8800000c			# $6 == where we want to be
+/*	#la      $6,_branch */
+	beq	$5, $6, _start_in_ram
+	nop
+	/* relocate the code from EEPROM to RAM */
+        la	$7, _edata
+relocate:
+        nop
+	lw	$8, ($5)			# $8 = *EEPROM
+	addu	$5, $5, 4			# EEPROM++
+        sw      $8, ($6)			# *RAM = $8
+	addu	$6, $6, 4			# RAM++
+	bne	$6, $7, relocate		# copied all the way to edata?
+	nop
+	la	$6, _start_in_ram
+	jr	$6
+	nop
+	.end _start
+
+	.globl	_start_in_ram
+	.ent _start_in_ram
+#endif
+_start_in_ram:
+	nop
+#if 0
+#ifdef __mips_embedded_pic
+	PICBASE = .+8
+        bal	PICBASE
+	nop
+	move	s0,$31
+#endif
+#endif
+	li	v0, SR_CU1|SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+	mtc0	zero, C0_CAUSE
+
+#if 0
+/* Check for FPU presence */
+#ifndef __mips_soft_float
+/* This doesn't work if there is no FPU.  We get illegal instruction
+   exceptions.  */
+	li	t2,0xAAAA5555
+	mtc1	t2,fp0		/* write to FPR 0 */
+	mtc1	zero,fp1	/* write to FPR 1 */
+	mfc1	t0,fp0
+	mfc1	t1,fp1
+	nop
+	bne	t0,t2,1f	/* check for match */
+	nop
+	bne	t1,zero,1f	/* double check */
+	nop
+#ifndef __mips64  /* Clear the FR bit */
+	li	v0, SR_CU1|SR_PE|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+#endif
+	j	2f
+	nop
+#endif
+#endif
+
+1:
+	li	v0, SR_PE|SR_FR|SR_KX|SR_SX|SR_UX
+	mtc0	v0, C0_SR
+2:
+/* Fix high bits, if any, of the PC so that exception handling
+   doesn't get confused.  */
+	LA (v0, 3f)
+	jr	v0
+	nop
+3:
+	LA (gp, _gp)				# set the global data pointer
+#if 0
+	.end _start_in_ram
+#else
+	.end _start
+#endif
+
+/*
+ * zero out the bss section.
+ */
+	.globl	zerobss
+	.ent	zerobss
+zerobss:
+	LA (v0, _fbss)
+	LA (v1, _end)
+3:
+	sw	zero,0(v0)
+	bltu	v0,v1,3b
+	addiu	v0,v0,4				# executed in delay slot
+
+	la	t0, _stack_init			# initialize stack so we
+	/* We must subtract 24 bytes for the 3 8 byte arguments to main, in
+	   case main wants to write them back to the stack.  The caller is
+	   supposed to allocate stack space for parameters in registers in
+	   the old MIPS ABIs.  We must do this even though we aren't passing
+	   arguments, because main might be declared to have them.
+
+	   Some ports need a larger alignment for the stack, so we subtract
+	   32, which satisifes the stack for the arguments and keeps the
+	   stack pointer better aligned.  */
+	subu	t0,t0,32
+	move	sp,t0				# set stack pointer
+	.end	zerobss
+
+	.globl	exit .text
+	.globl	init
+	.ent	init
+init:
+        nop
+	jal	init_tlb		/* clear the tlb */
+	move	a0,zero				# set command line to 0
+	jal	boot_card			# call the program start function
+	nop
+
+dead:
+	b	dead
+	nop
+	.end	init
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+	.globl	_sys_exit
+	.ent _sys_exit
+_sys_exit:
+7:
+#ifdef GCRT0
+	jal	_mcleanup
+	nop
+#endif
+	/* break instruction can cope with 0xfffff, but GAS limits the range: */
+	break	1023
+	nop
+	b	7b				# but loop back just in-case
+	nop
+	.end _sys_exit
+
+/* EOF crt0.S */
diff --git a/bsps/mips/rbtx4925/start/start.S b/bsps/mips/rbtx4925/start/start.S
new file mode 100644
index 0000000000..058426f8c7
--- /dev/null
+++ b/bsps/mips/rbtx4925/start/start.S
@@ -0,0 +1,360 @@
+/*
+
+Based upon IDT provided code with the following release:
+
+This source code has been made available to you by IDT on an AS-IS
+basis. Anyone receiving this source is licensed under IDT copyrights
+to use it in any way he or she deems fit, including copying it,
+modifying it, compiling it, and redistributing it either with or
+without modifications.  No license under IDT patents or patent
+applications is to be implied by the copyright license.
+
+Any user of this software should understand that IDT cannot provide
+technical support for this software and will not be responsible for
+any consequences resulting from the use of this software.
+
+Any person who transfers this source code or any derivative work must
+include the IDT copyright notice, this paragraph, and the preceeding
+two paragraphs in the transferred software.
+
+COPYRIGHT IDT CORPORATION 1996
+LICENSED MATERIAL - PROGRAM PROPERTY OF IDT
+
+
+*************************************************************************
+**
+** Copyright 1991-95 Integrated Device Technology, Inc.
+**	All Rights Reserved
+**
+** idt_csu.S -- IDT stand alone startup code
+**
+**************************************************************************/
+#include <rtems/mips/iregdef.h>
+#include <rtems/mips/idtcpu.h>
+#include <rtems/asm.h>
+
+#include <bsp.h>
+
+	.extern	mon_flush_cache
+
+#if 0
+	.extern _fdata,4		/* this is defined by the linker */
+	.extern _edata,4		/* this is defined by the linker */
+	.extern _idata,4		/* this is defined by the linker */
+#endif
+	.extern _fbss,4			/* this is defined by the linker */
+	.extern end,4			/* this is defined by the linker */
+
+	.lcomm sim_mem_cfg_struct,12
+
+	.text
+
+#define HARD_CODED_MEM_SIZE	0x1000000	/* RBTX4925 has 16 megabytes of RAM */
+#define PMON_VECTOR 0xbfc00500
+
+#define TMP_STKSIZE  1024
+
+/*
+** P_STACKSIZE is the size of the Prom Stack.
+** the prom stack grows downward
+*/
+#define	P_STACKSIZE	0x2000   /* sets stack size to 8k */
+
+
+/**************************************************************************
+**
+**  start - Typical standalone start up code required for R3000/R4000
+**
+**
+**	1)  Initialize the STATUS Register
+**		a) Clear parity error bit
+**		b) Set co_processor 1 usable bit ON
+**		c) Clear all IntMask Enables
+**		d) Set kernel/disabled mode
+**	2)  Initialize Cause Register
+**		a)  clear software interrupt bits
+**	3)  Determine FPU installed or not
+**		if not, clear CoProcessor 1 usable bit
+**	4)  Initialize data areas. Clear bss area.
+**	5)  MUST allocate temporary stack until memory size determined
+**	    It MUST be uncached to prevent overwriting when caches are cleared
+**	6)  Install exception handlers
+**	7)  Determine memory and cache sizes
+**	8)  Establish permanent stack (cached or uncached as defined by bss)
+**	9)  Flush Instruction and Data caches
+** 	10)  If there is a Translation Lookaside Buffer, Clear the TLB
+** 	11)  Execute initialization code if the IDT/c library is to be used
+**
+** 	12)  Jump to user's "main()"
+** 	13)  Jump to promexit
+**
+**	IDT/C 5.x defines _R3000, IDT/C 6.x defines _R4000 internally.
+**	This is used to mark code specific to R3xxx or R4xxx processors.
+**	IDT/C 6.x defines __mips to be the ISA level for which we're
+**	generating code. This is used to make sure the stack etc. is
+**	double word aligned, when using -mips3 (default) or -mips2,
+**	when compiling with IDT/C6.x
+**
+***************************************************************************/
+
+FRAME(start,sp,0,ra)
+
+	.set	noreorder
+#if __mips_fpr == 64
+	li	v0,SR_CU1|SR_FR 	/* initally clear ERL, enable FPU with 64 bit regs */
+#else
+	li	v0,SR_CU1	 	/* initally clear ERL, enable FPU with 32 bit regs */
+#endif
+
+	mtc0	v0,C0_SR		/* clr IntMsks/ kernel/disabled mode */
+	nop
+	mtc0	zero,C0_CAUSE		/* clear software interrupts */
+	nop
+
+	li	v0,CFG_C_NONCOHERENT	/* initialise default cache mode */
+	mtc0	v0,C0_CONFIG
+
+/*
+**	check to see if a fpu is really plugged in
+*/
+	li	t3,0xaaaa5555		/*  put a's and 5's in t3	*/
+	mtc1	t3,fp0			/* try to write them into fp0   */
+	mtc1	zero,fp1		/* try to write zero in fp	*/
+	mfc1	t0,fp0
+	mfc1	t1,fp1
+	nop
+	bne	t0,t3,1f		/* branch if no match  */
+	nop
+	bne	t1,zero,1f		/* double check for positive id   */
+	nop
+	/* We have a FPU. clear fcsr */
+	ctc1	zero, fcr31
+	j	2f			/* status register already correct  */
+	nop
+1:
+        li      v0,0x0	 		/* clear ERL and disable FPA */
+
+	mtc0	v0, C0_SR		/* reset status register */
+2:
+	la  	gp, _gp			/* Initialize gp register (pointer to "small" data)*/
+
+#if 0
+					/* Initialize data sections from "rom" copy */
+	la	t0,_idata		/* address of initialization data (copy of data sections placed in ROM) */
+	la	t1,_fdata		/* start of initialized data section */
+	la	t2,_edata		/* end of initialized data section */
+3:
+	lw	t3,0(t0)
+	sw	t3,0(t1)
+	addiu	t1,t1,4
+	bne	t1,t2,3b
+	addiu	t0,t0,4
+#endif
+
+	 				/* clear bss before using it */
+	la	v0,_fbss		/* start of bss */
+	la	v1,end 			/* end of bss */
+4:	sw	zero,0(v0)
+	bltu	v0,v1,4b
+	add	v0,4
+
+
+/************************************************************************
+**
+** 	Temporary Stack - needed to  handle stack saves until
+**			  memory size is determined and permanent stack set
+**
+**			  MUST be uncached to avoid confusion at cache
+**			       switching during memory sizing
+**
+*************************************************************************/
+	/* For MIPS 3, we need to be sure that the stack is aligned on a
+	 * double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 11f   /* Last three bits Zero, already aligned */
+	nop
+	add	v0, 4
+11:
+
+	or	v0, K1BASE		/* switch to uncached */
+	add	v1, v0, TMP_STKSIZE 	/* end of bss + length of tmp stack */
+	sub	v1, v1, (4*4)		/* overhead */
+	move	sp, v1			/* set sp to top of stack */
+4:	sw	zero, 0(v0)
+	bltu	v0, v1, 4b		/* clear out temp stack */
+	add	v0, 4
+
+/* 	jal	init_exc_vecs */		/* install exception handlers */
+/*	nop */				/* MUST do before memory probes */
+
+					/* Force processor into uncached space during memory/cache probes */
+	la	v0, 5f
+	li	v1, K1BASE
+	or	v0, v1
+	j	v0
+	nop
+5:
+
+	li	a0, HARD_CODED_MEM_SIZE	/* Set memory size global */
+	jal	set_memory_size
+	nop
+
+	la	a0, sim_mem_cfg_struct
+	jal	get_mem_conf		/* Make call to get mem size */
+	nop
+	la	a0, sim_mem_cfg_struct
+	lw	a0, 0(a0)		/* Get memory size from struct */
+
+	jal	config_cache		/* determine size of D & I caches */
+	nop
+
+	move	v0, a0			/* mem_size */
+
+	/* For MIPS 3, we need to be sure that the stack (and hence v0
+	 * here) is aligned on a double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 12f   /* Last three bits Zero, already aligned */
+	nop
+	subu	v0, 4	/* mem_size was not aligned on doubleword bdry????*/
+12:
+
+
+
+/**************************************************************************
+**
+**  Permanent Stack - now know top of memory, put permanent stack there
+**
+***************************************************************************/
+
+	la	t2, _fbss		/* cache mode as linked */
+	and	t2, 0xF0000000		/* isolate segment */
+	la	t1, 6f
+	j	t1			/* back to original cache mode */
+	nop
+6:
+	or 	v0, t2			/* stack back to original cache mode */
+	addiu   v0,v0,-16		/* overhead */
+	move	sp, v0			/* now replace count w top of memory */
+	move	v1, v0
+	subu	v1, P_STACKSIZE 	/* clear requested stack size */
+
+7:	sw	zero, 0(v1)		/* clear P_STACKSIZE  stack */
+	bltu	v1,v0,7b
+	add	v1, 4
+
+
+/* Invalidate data cache*/
+	lui	t0, 0x8000		/* Set starting address */
+	addi	t1, t0, 0x2000		/* Calculate end address (assume worst case of 32 KByte / 4 Way cache) */
+					/* D-Cache Writeback and Invalidate */
+1:	bge	t0, t1, 2f		/* if(t0>=end_addr) then exit */
+	nop
+	cache	1, 0(t0)		/* Index_Writeback_Inv_D way 0 */
+	cache	1, 1(t0)		/* Index_Writeback_Inv_D way 1 */
+	cache	1, 2(t0)		/* Index_Writeback_Inv_D way 2 */
+	cache	1, 3(t0)		/* Index_Writeback_Inv_D way 3 */
+	b	1b
+	addi	t0, t0, 32
+2:
+
+/* Invalidate instruction cache*/
+	lui	t0, 0x8000		/* Set starting address */
+	addi	t1, t0, 0x2000		/* Calculate end address (assume worst case of 32 KByte / 4 Way cache) */
+					/* I-Cache Disable */
+	mfc0	t2, C0_CONFIG		/* get C0_Config */
+	lui	t3, 0x2			/* C0_CONFIG#17 ICE# */
+	or	t3, t2, t3		/* set ICE# bit */
+	mtc0	t3, C0_CONFIG		/* set C_Config */
+	b	1f			/* stop streaming */
+	nop
+					/* I-Cache Invalidate */
+1:	bge	t0, t1, 2f		/* if(t0>=end_addr) then exit */
+	nop
+	cache	0, 0(t0)		/* Index_Invalidate_I way 0 */
+	cache	0, 1(t0)		/* Index_Invalidate_I way 1 */
+	cache	0, 2(t0)		/* Index_Invalidate_I way 2 */
+	cache	0, 3(t0)		/* Index_Invalidate_I way 3 */
+	b	1b
+	addi	t0, t0, 32
+    					/* I-Cache Enable */
+2:	mtc0	t2, C0_CONFIG		/* set C0_Config */
+	nop
+
+/* Lock first 4k of PMON into instruction cache. This includes interrupt service code which
+ we don't want to run out of slow flash device. */
+
+	la	t0,0x9fc00000
+	li	t1, 0x1000
+
+	move	t3, t0
+	addu	t1, t0, t1
+1:	bge	t0, t1, 2f
+	nop
+	lui	t2, 0x1fff		/* MASK */
+	ori	t2, t2, 0xf000
+	and	t2, t3, t2		/* virtual->physical */
+	srl	t2, t2, 4		/* [31:12] --> [35:8] */
+	ori	t2, t2, 0x00c4		/* Set Valid & Lock Bits */
+	mtc0	t2, C0_TAGLO		/* Load data to TagLo reg. */
+	nop
+	cache	0x08, 3(t0)		/* 2(I)=0x08: Index_Store_Tag(I$) Way3*/
+	nop
+	cache	0x14, 3(t0)		/* 5(I)=0x14: Fill(Memory->Cache) Way3*/
+	b	1b
+	addi	t0, t0, 32
+2:	nop
+
+	.set	reorder
+
+/*
+** Clear Translation Lookaside Buffer (TLB)
+*/
+	jal	init_tlb		/* clear the tlb */
+
+/*
+** End of CPU initialization, ready to start kernel
+*/
+	move	a0,zero		/* Set argc passed to main */
+	jal	boot_card
+	nop
+
+/* Kernel has been shutdown, jump to the "exit" routine */
+	jal	_sys_exit
+	move	a0,v0				# pass through the exit code
+
+1:
+	beq	zero,zero,1b
+	nop
+
+ENDFRAME(start)
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+FRAME(_sys_exit,sp,0,ra)
+
+	break	1023
+	nop
+13:
+	b	13b				# but loop back just in-case
+	nop
+
+ENDFRAME(_sys_exit)
+
+
+
+	.globl	__sizemem
+	.ent	__sizemem
+__sizemem:
+	li	v0,HARD_CODED_MEM_SIZE
+	j	ra
+	nop
+	.end	__sizemem
+
diff --git a/bsps/mips/rbtx4938/start/start.S b/bsps/mips/rbtx4938/start/start.S
new file mode 100644
index 0000000000..406f1b6bbd
--- /dev/null
+++ b/bsps/mips/rbtx4938/start/start.S
@@ -0,0 +1,359 @@
+/*
+
+Based upon IDT provided code with the following release:
+
+This source code has been made available to you by IDT on an AS-IS
+basis. Anyone receiving this source is licensed under IDT copyrights
+to use it in any way he or she deems fit, including copying it,
+modifying it, compiling it, and redistributing it either with or
+without modifications.  No license under IDT patents or patent
+applications is to be implied by the copyright license.
+
+Any user of this software should understand that IDT cannot provide
+technical support for this software and will not be responsible for
+any consequences resulting from the use of this software.
+
+Any person who transfers this source code or any derivative work must
+include the IDT copyright notice, this paragraph, and the preceeding
+two paragraphs in the transferred software.
+
+COPYRIGHT IDT CORPORATION 1996
+LICENSED MATERIAL - PROGRAM PROPERTY OF IDT
+
+
+*************************************************************************
+**
+** Copyright 1991-95 Integrated Device Technology, Inc.
+**	All Rights Reserved
+**
+** idt_csu.S -- IDT stand alone startup code
+**
+**************************************************************************/
+#include <rtems/mips/iregdef.h>
+#include <rtems/mips/idtcpu.h>
+#include <rtems/asm.h>
+
+#include <bsp.h>
+
+	.extern	mon_flush_cache
+
+#if 0
+	.extern _fdata,4		/* this is defined by the linker */
+	.extern _edata,4		/* this is defined by the linker */
+	.extern _idata,4		/* this is defined by the linker */
+#endif
+	.extern _fbss,4			/* this is defined by the linker */
+	.extern end,4			/* this is defined by the linker */
+
+	.lcomm sim_mem_cfg_struct,12
+
+	.text
+
+#define HARD_CODED_MEM_SIZE	0x1000000	/* RBTX4938 has 16 megabytes of RAM */
+#define PMON_VECTOR 0xbfc00500
+
+#define TMP_STKSIZE  1024
+
+/*
+** P_STACKSIZE is the size of the Prom Stack.
+** the prom stack grows downward
+*/
+#define	P_STACKSIZE	0x2000   /* sets stack size to 8k */
+
+/**************************************************************************
+**
+**  start - Typical standalone start up code required for R3000/R4000
+**
+**
+**	1)  Initialize the STATUS Register
+**		a) Clear parity error bit
+**		b) Set co_processor 1 usable bit ON
+**		c) Clear all IntMask Enables
+**		d) Set kernel/disabled mode
+**	2)  Initialize Cause Register
+**		a)  clear software interrupt bits
+**	3)  Determine FPU installed or not
+**		if not, clear CoProcessor 1 usable bit
+**	4)  Initialize data areas. Clear bss area.
+**	5)  MUST allocate temporary stack until memory size determined
+**	    It MUST be uncached to prevent overwriting when caches are cleared
+**	6)  Install exception handlers
+**	7)  Determine memory and cache sizes
+**	8)  Establish permanent stack (cached or uncached as defined by bss)
+**	9)  Flush Instruction and Data caches
+** 	10)  If there is a Translation Lookaside Buffer, Clear the TLB
+** 	11)  Execute initialization code if the IDT/c library is to be used
+**
+** 	12)  Jump to user's "main()"
+** 	13)  Jump to promexit
+**
+**	IDT/C 5.x defines _R3000, IDT/C 6.x defines _R4000 internally.
+**	This is used to mark code specific to R3xxx or R4xxx processors.
+**	IDT/C 6.x defines __mips to be the ISA level for which we're
+**	generating code. This is used to make sure the stack etc. is
+**	double word aligned, when using -mips3 (default) or -mips2,
+**	when compiling with IDT/C6.x
+**
+***************************************************************************/
+
+FRAME(start,sp,0,ra)
+
+	.set	noreorder
+#if __mips_fpr == 64
+	li	v0,SR_CU1|SR_FR 	/* initally clear ERL, enable FPU with 64 bit regs */
+#else
+	li	v0,SR_CU1	 	/* initally clear ERL, enable FPU with 32 bit regs */
+#endif
+
+	mtc0	v0,C0_SR		/* clr IntMsks/ kernel/disabled mode */
+	nop
+	mtc0	zero,C0_CAUSE		/* clear software interrupts */
+	nop
+
+	li	v0,CFG_C_NONCOHERENT	/* initialise default cache mode */
+	mtc0	v0,C0_CONFIG
+
+/*
+**	check to see if a fpu is really plugged in
+*/
+	li	t3,0xaaaa5555		/*  put a's and 5's in t3	*/
+	mtc1	t3,fp0			/* try to write them into fp0   */
+	mtc1	zero,fp1		/* try to write zero in fp	*/
+	mfc1	t0,fp0
+	mfc1	t1,fp1
+	nop
+	bne	t0,t3,1f		/* branch if no match  */
+	nop
+	bne	t1,zero,1f		/* double check for positive id   */
+	nop
+	/* We have a FPU. clear fcsr */
+	ctc1	zero, fcr31
+	j	2f			/* status register already correct  */
+	nop
+1:
+        li      v0,0x0	 		/* clear ERL and disable FPA */
+
+	mtc0	v0, C0_SR		/* reset status register */
+2:
+	la  	gp, _gp			/* Initialize gp register (pointer to "small" data)*/
+
+#if 0
+					/* Initialize data sections from "rom" copy */
+	la	t0,_idata		/* address of initialization data (copy of data sections placed in ROM) */
+	la	t1,_fdata		/* start of initialized data section */
+	la	t2,_edata		/* end of initialized data section */
+3:
+	lw	t3,0(t0)
+	sw	t3,0(t1)
+	addiu	t1,t1,4
+	bne	t1,t2,3b
+	addiu	t0,t0,4
+#endif
+
+	 				/* clear bss before using it */
+	la	v0,_fbss		/* start of bss */
+	la	v1,end 			/* end of bss */
+4:	sw	zero,0(v0)
+	bltu	v0,v1,4b
+	add	v0,4
+
+
+/************************************************************************
+**
+** 	Temporary Stack - needed to  handle stack saves until
+**			  memory size is determined and permanent stack set
+**
+**			  MUST be uncached to avoid confusion at cache
+**			       switching during memory sizing
+**
+*************************************************************************/
+	/* For MIPS 3, we need to be sure that the stack is aligned on a
+	 * double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 11f   /* Last three bits Zero, already aligned */
+	nop
+	add	v0, 4
+11:
+
+	or	v0, K1BASE		/* switch to uncached */
+	add	v1, v0, TMP_STKSIZE 	/* end of bss + length of tmp stack */
+	sub	v1, v1, (4*4)		/* overhead */
+	move	sp, v1			/* set sp to top of stack */
+4:	sw	zero, 0(v0)
+	bltu	v0, v1, 4b		/* clear out temp stack */
+	add	v0, 4
+
+/* 	jal	init_exc_vecs */		/* install exception handlers */
+/*	nop */				/* MUST do before memory probes */
+
+					/* Force processor into uncached space during memory/cache probes */
+	la	v0, 5f
+	li	v1, K1BASE
+	or	v0, v1
+	j	v0
+	nop
+5:
+
+	li	a0, HARD_CODED_MEM_SIZE	/* Set memory size global */
+	jal	set_memory_size
+	nop
+
+	la	a0, sim_mem_cfg_struct
+	jal	get_mem_conf		/* Make call to get mem size */
+	nop
+	la	a0, sim_mem_cfg_struct
+	lw	a0, 0(a0)		/* Get memory size from struct */
+
+	jal	config_cache		/* determine size of D & I caches */
+	nop
+
+	move	v0, a0			/* mem_size */
+
+	/* For MIPS 3, we need to be sure that the stack (and hence v0
+	 * here) is aligned on a double word boundary.
+	 */
+	andi	t0, v0, 0x7
+	beqz	t0, 12f   /* Last three bits Zero, already aligned */
+	nop
+	subu	v0, 4	/* mem_size was not aligned on doubleword bdry????*/
+12:
+
+
+
+/**************************************************************************
+**
+**  Permanent Stack - now know top of memory, put permanent stack there
+**
+***************************************************************************/
+
+	la	t2, _fbss		/* cache mode as linked */
+	and	t2, 0xF0000000		/* isolate segment */
+	la	t1, 6f
+	j	t1			/* back to original cache mode */
+	nop
+6:
+	or 	v0, t2			/* stack back to original cache mode */
+	addiu   v0,v0,-16		/* overhead */
+	move	sp, v0			/* now replace count w top of memory */
+	move	v1, v0
+	subu	v1, P_STACKSIZE 	/* clear requested stack size */
+
+7:	sw	zero, 0(v1)		/* clear P_STACKSIZE  stack */
+	bltu	v1,v0,7b
+	add	v1, 4
+
+
+/* Invalidate data cache*/
+	lui	t0, 0x8000		/* Set starting address */
+	addi	t1, t0, 0x2000		/* Calculate end address (assume worst case of 32 KByte / 4 Way cache) */
+					/* D-Cache Writeback and Invalidate */
+1:	bge	t0, t1, 2f		/* if(t0>=end_addr) then exit */
+	nop
+	cache	1, 0(t0)		/* Index_Writeback_Inv_D way 0 */
+	cache	1, 1(t0)		/* Index_Writeback_Inv_D way 1 */
+	cache	1, 2(t0)		/* Index_Writeback_Inv_D way 2 */
+	cache	1, 3(t0)		/* Index_Writeback_Inv_D way 3 */
+	b	1b
+	addi	t0, t0, 32
+2:
+
+/* Invalidate instruction cache*/
+	lui	t0, 0x8000		/* Set starting address */
+	addi	t1, t0, 0x2000		/* Calculate end address (assume worst case of 32 KByte / 4 Way cache) */
+					/* I-Cache Disable */
+	mfc0	t2, C0_CONFIG		/* get C0_Config */
+	lui	t3, 0x2			/* C0_CONFIG#17 ICE# */
+	or	t3, t2, t3		/* set ICE# bit */
+	mtc0	t3, C0_CONFIG		/* set C_Config */
+	b	1f			/* stop streaming */
+	nop
+					/* I-Cache Invalidate */
+1:	bge	t0, t1, 2f		/* if(t0>=end_addr) then exit */
+	nop
+	cache	0, 0(t0)		/* Index_Invalidate_I way 0 */
+	cache	0, 1(t0)		/* Index_Invalidate_I way 1 */
+	cache	0, 2(t0)		/* Index_Invalidate_I way 2 */
+	cache	0, 3(t0)		/* Index_Invalidate_I way 3 */
+	b	1b
+	addi	t0, t0, 32
+    					/* I-Cache Enable */
+2:	mtc0	t2, C0_CONFIG		/* set C0_Config */
+	nop
+
+/* Lock first 4k of PMON into instruction cache. This includes interrupt service code which
+ we don't want to run out of slow flash device. */
+
+	la	t0,0x9fc00000
+	li	t1, 0x1000
+
+	move	t3, t0
+	addu	t1, t0, t1
+1:	bge	t0, t1, 2f
+	nop
+	lui	t2, 0x1fff		/* MASK */
+	ori	t2, t2, 0xf000
+	and	t2, t3, t2		/* virtual->physical */
+	srl	t2, t2, 4		/* [31:12] --> [35:8] */
+	ori	t2, t2, 0x00c4		/* Set Valid & Lock Bits */
+	mtc0	t2, C0_TAGLO		/* Load data to TagLo reg. */
+	nop
+	cache	0x08, 3(t0)		/* 2(I)=0x08: Index_Store_Tag(I$) Way3*/
+	nop
+	cache	0x14, 3(t0)		/* 5(I)=0x14: Fill(Memory->Cache) Way3*/
+	b	1b
+	addi	t0, t0, 32
+2:	nop
+
+	.set	reorder
+
+/*
+** Clear Translation Lookaside Buffer (TLB)
+*/
+	jal	init_tlb		/* clear the tlb */
+
+/*
+** End of CPU initialization, ready to start kernel
+*/
+	move	a0,zero		/* Set command line passed to boot_card */
+	jal	boot_card
+	nop
+
+/* Kernel has been shutdown, jump to the "exit" routine */
+	jal	_sys_exit
+	move	a0,v0				# pass through the exit code
+
+1:
+	beq	zero,zero,1b
+	nop
+
+ENDFRAME(start)
+
+/*
+ * _sys_exit -- Exit from the application. Normally we cause a user trap
+ *          to return to the ROM monitor for another run. NOTE: This is
+ *	    the only other routine we provide in the crt0.o object, since
+ *          it may be tied to the "_start" routine. It also allows
+ *          executables that contain a complete world to be linked with
+ *          just the crt0.o object.
+ */
+FRAME(_sys_exit,sp,0,ra)
+
+	break	1023
+	nop
+13:
+	b	13b				# but loop back just in-case
+	nop
+
+ENDFRAME(_sys_exit)
+
+
+
+	.globl	__sizemem
+	.ent	__sizemem
+__sizemem:
+	li	v0,HARD_CODED_MEM_SIZE
+	j	ra
+	nop
+	.end	__sizemem
+