Merge with /home/stefan/git/u-boot/u-boot-coldfire-freescale

1 files changed, 335 insertions, 0 deletions

diff --git a/cpu/mcf532x/start.S b/cpu/mcf532x/start.S
new file mode 100644
index 0000000..ac44aaa
--- /dev/null
+++ b/cpu/mcf532x/start.S
@@ -0,0 +1,335 @@
+/*
+ * Copyright (C) 2003	Josef Baumgartner <josef.baumgartner@telex.de>
+ * Based on code from Bernhard Kuhn <bkuhn@metrowerks.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
+ */
+
+#include <config.h>
+#include "version.h"
+
+#ifndef	 CONFIG_IDENT_STRING
+#define	 CONFIG_IDENT_STRING ""
+#endif
+
+#define _START	_start
+#define _FAULT	_fault
+
+#define SAVE_ALL						\
+	move.w	#0x2700,%sr;		/* disable intrs */	\
+	subl	#60,%sp;		/* space for 15 regs */ \
+	moveml	%d0-%d7/%a0-%a6,%sp@;
+
+#define RESTORE_ALL						\
+	moveml	%sp@,%d0-%d7/%a0-%a6;				\
+	addl	#60,%sp;		/* space for 15 regs */ \
+	rte;
+
+.text
+/*
+ *	Vector table. This is used for initial platform startup.
+ *	These vectors are to catch any un-intended traps.
+ */
+_vectors:
+
+INITSP:		.long	0x00000000	/* Initial SP	*/
+INITPC:		.long	_START	/* Initial PC 		*/
+vector02:	.long	_FAULT	/* Access Error		*/
+vector03:	.long	_FAULT	/* Address Error	*/
+vector04:	.long	_FAULT	/* Illegal Instruction	*/
+vector05:	.long	_FAULT	/* Reserved		*/
+vector06:	.long	_FAULT	/* Reserved		*/
+vector07:	.long	_FAULT	/* Reserved		*/
+vector08:	.long	_FAULT	/* Privilege Violation	*/
+vector09:	.long	_FAULT	/* Trace		*/
+vector0A:	.long	_FAULT	/* Unimplemented A-Line	*/
+vector0B:	.long	_FAULT	/* Unimplemented F-Line	*/
+vector0C:	.long	_FAULT	/* Debug Interrupt	*/
+vector0D:	.long	_FAULT	/* Reserved		*/
+vector0E:	.long	_FAULT	/* Format Error		*/
+vector0F:	.long	_FAULT	/* Unitialized Int.	*/
+
+/* Reserved */
+vector10_17:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+vector18:	.long	_FAULT	/* Spurious Interrupt	*/
+vector19:	.long	_FAULT	/* Autovector Level 1	*/
+vector1A:	.long	_FAULT	/* Autovector Level 2	*/
+vector1B:	.long	_FAULT	/* Autovector Level 3	*/
+vector1C:	.long	_FAULT	/* Autovector Level 4	*/
+vector1D:	.long	_FAULT	/* Autovector Level 5	*/
+vector1E:	.long	_FAULT	/* Autovector Level 6	*/
+vector1F:	.long	_FAULT	/* Autovector Level 7	*/
+
+/* TRAP #0 - #15 */
+vector20_2F:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+/* Reserved	*/
+vector30_3F:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+vector64_127:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+vector128_191:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+vector192_255:
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+.long	_FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT, _FAULT
+
+	.text
+
+	.globl	_start
+_start:
+	nop
+	nop
+	move.w #0x2700,%sr	/* Mask off Interrupt */
+
+	/* Set vector base register at the beginning of the Flash */
+	move.l	#CFG_FLASH_BASE, %d0
+	movec	%d0, %VBR
+
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_RAM_CTRL), %d0
+	movec	%d0, %RAMBAR0
+
+	/* invalidate and disable cache */
+	move.l	#0x01000000, %d0		/* Invalidate cache cmd */
+	movec	%d0, %CACR			/* Invalidate cache */
+	move.l	#0, %d0
+	movec	%d0, %ACR0
+	movec	%d0, %ACR1
+
+	/* initialize general use internal ram */
+	move.l #0, %d0
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a2
+	move.l %d0, (%a1)
+	move.l %d0, (%a2)
+
+	/* set stackpointer to end of internal ram to get some stackspace for the
+	   first c-code */
+	move.l	#(CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET), %sp
+	clr.l %sp@-
+
+	move.l #__got_start, %a5	/* put relocation table address to a5 */
+
+	bsr cpu_init_f			/* run low-level CPU init code (from flash) */
+	bsr board_init_f		/* run low-level board init code (from flash) */
+
+	/* board_init_f() does not return */
+
+/*------------------------------------------------------------------------------*/
+
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ * r3 = dest
+ * r4 = src
+ * r5 = length in bytes
+ * r6 = cachelinesize
+ */
+	.globl	relocate_code
+relocate_code:
+	link.w %a6,#0
+	move.l 8(%a6), %sp		/* set new stack pointer */
+
+	move.l 12(%a6), %d0		/* Save copy of Global Data pointer */
+	move.l 16(%a6), %a0		/* Save copy of Destination Address */
+
+	move.l #CFG_MONITOR_BASE, %a1
+	move.l #__init_end, %a2
+	move.l %a0, %a3
+
+	/* copy the code to RAM */
+1:
+	move.l (%a1)+, (%a3)+
+	cmp.l  %a1,%a2
+	bgt.s	 1b
+
+/*
+ * We are done. Do not return, instead branch to second part of board
+ * initialization, now running from RAM.
+ */
+	move.l	%a0, %a1
+	add.l	#(in_ram - CFG_MONITOR_BASE), %a1
+	jmp	(%a1)
+
+in_ram:
+
+clear_bss:
+	/*
+	 * Now clear BSS segment
+	 */
+	move.l	%a0, %a1
+	add.l	#(_sbss - CFG_MONITOR_BASE),%a1
+	move.l	%a0, %d1
+	add.l	#(_ebss - CFG_MONITOR_BASE),%d1
+6:
+	clr.l	(%a1)+
+	cmp.l	%a1,%d1
+	bgt.s	6b
+
+	/*
+	 * fix got table in RAM
+	 */
+	move.l	%a0, %a1
+	add.l	#(__got_start - CFG_MONITOR_BASE),%a1
+	move.l	%a1,%a5		/* * fix got pointer register a5 */
+
+	move.l	%a0, %a2
+	add.l	#(__got_end - CFG_MONITOR_BASE),%a2
+
+7:
+	move.l	(%a1),%d1
+	sub.l	#_start,%d1
+	add.l	%a0,%d1
+	move.l	%d1,(%a1)+
+	cmp.l	%a2, %a1
+	bne	7b
+
+	/* calculate relative jump to board_init_r in ram */
+	move.l %a0, %a1
+	add.l #(board_init_r - CFG_MONITOR_BASE), %a1
+
+	/* set parameters for board_init_r */
+	move.l %a0,-(%sp)		/* dest_addr */
+	move.l %d0,-(%sp)		/* gd */
+	jsr	(%a1)
+
+/*------------------------------------------------------------------------------*/
+/* exception code */
+	.globl _fault
+_fault:
+	jmp _fault
+	.globl	_exc_handler
+
+_exc_handler:
+	SAVE_ALL
+	movel	%sp,%sp@-
+	bsr exc_handler
+	addql	#4,%sp
+	RESTORE_ALL
+
+	.globl	_int_handler
+_int_handler:
+	SAVE_ALL
+	movel	%sp,%sp@-
+	bsr int_handler
+	addql	#4,%sp
+	RESTORE_ALL
+
+/*------------------------------------------------------------------------------*/
+/* cache functions */
+	.globl	icache_enable
+icache_enable:
+	move.l	#0x01000000, %d0		/* Invalidate cache cmd */
+	movec	%d0, %CACR			/* Invalidate cache */
+	move.l	#(CFG_SDRAM_BASE + 0xc000), %d0	/* Setup cache mask */
+	movec	%d0, %ACR0			/* Enable cache */
+
+	move.l	#0x80000200, %d0		/* Setup cache mask */
+	movec	%d0, %CACR			/* Enable cache */
+	nop
+
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
+	moveq	#1, %d0
+	move.l	%d0, (%a1)
+	rts
+
+	.globl	icache_disable
+icache_disable:
+	move.l	#0x01000000, %d0		/* Setup cache mask */
+	movec	%d0, %CACR			/* Disable cache */
+	clr.l	%d0				/* Setup cache mask */
+	movec	%d0, %ACR0
+	movec	%d0, %ACR1
+
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
+	moveq	#0, %d0
+	move.l	%d0, (%a1)
+	rts
+
+	.globl	icache_status
+icache_status:
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-8), %a1
+	move.l	(%a1), %d0
+	rts
+
+	.globl	icache_invalid
+icache_invalid:
+	move.l	#0x81000200, %d0		/* Setup cache mask */
+	movec	%d0, %CACR			/* Enable cache */
+	rts
+
+	.globl	dcache_enable
+dcache_enable:
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
+	moveq	#1, %d0
+	move.l	%d0, (%a1)
+	rts
+
+    /* No dcache, just a dummy function */
+	.globl	dcache_disable
+dcache_disable:
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
+	moveq	#0, %d0
+	move.l	%d0, (%a1)
+	rts
+
+	.globl	dcache_status
+dcache_status:
+	move.l #(CFG_INIT_RAM_ADDR+CFG_INIT_RAM_END-4), %a1
+	move.l	(%a1), %d0
+	rts
+
+/*------------------------------------------------------------------------------*/
+
+	.globl	version_string
+version_string:
+	.ascii U_BOOT_VERSION
+	.ascii " (", __DATE__, " - ", __TIME__, ")"
+	.ascii CONFIG_IDENT_STRING, "\0"