lowlevel_foo.patch

Uboot常用的移植patches, 方便定制移植到s3c2440

board/neo1973/lowlevel_foo.S: http://people.openmoko.org/laforge/tmp/bbt-20070206/lowlevel_foo.S
board/neo1973/lowlevel_foo.lds: http://people.openmoko.org/laforge/tmp/bbt-20070206/lowlevel_foo.lds
board/neo1973/Makefile: added building of lowlevel_foo.bin (based on
  http://people.openmoko.org/laforge/tmp/bbt-20070206/lowlevel_foo.build.sh)

Index: u-boot/board/neo1973/common/lowlevel_foo.S
===================================================================
--- /dev/null
+++ u-boot/board/neo1973/common/lowlevel_foo.S
@@ -0,0 +1,82 @@
+
+_start:
+	b 	reset
+undefvec:
+	b	undefvec
+swivec:
+	b	swivec
+pabtvec:
+	b	pabtvec
+dabtvec:
+	b	dabtvec
+rsvdvec:
+	b	rsvdvec
+irqvec:
+	b	irqvec
+fiqvec:
+	b	fiqvec
+
+reset:
+	/*
+	 * set the cpu to SVC32 mode
+	 */
+	mrs	r0,cpsr
+	bic	r0,r0,#0x1f
+	orr	r0,r0,#0xd3
+	msr	cpsr,r0
+
+/* turn off the watchdog */
+#define pWTCON		0x53000000
+#define INTMSK		0x4A000008	/* Interupt-Controller base addresses */
+#define INTSUBMSK	0x4A00001C
+#define CLKDIVN	0x4C000014	/* clock divisor register */
+
+	ldr     r0, =pWTCON
+	mov     r1, #0x0
+	str     r1, [r0]
+
+	mov	r1, #0xffffffff
+	ldr	r0, =INTMSK
+	str	r1, [r0]
+	ldr	r1, =0x3ff
+	ldr	r0, =INTSUBMSK
+	str	r1, [r0]
+
+	/* FCLK:HCLK:PCLK = 1:2:4 */
+	/* default FCLK is 120 MHz ! */
+	ldr	r0, =CLKDIVN
+	mov	r1, #3
+	str	r1, [r0]
+
+	bl	cpu_init_crit
+	ldr	r0,=TEXT_BASE
+	mov	pc, r0
+
+cpu_init_crit:
+	/*
+	 * flush v4 I/D caches
+	 */
+	mov	r0, #0
+	mcr	p15, 0, r0, c7, c7, 0	/* flush v3/v4 cache */
+	mcr	p15, 0, r0, c8, c7, 0	/* flush v4 TLB */
+
+	/*
+	 * disable MMU stuff and caches
+	 */
+	mrc	p15, 0, r0, c1, c0, 0
+	bic	r0, r0, #0x00002300	@ clear bits 13, 9:8 (--V- --RS)
+	bic	r0, r0, #0x00000087	@ clear bits 7, 2:0 (B--- -CAM)
+	orr	r0, r0, #0x00000002	@ set bit 2 (A) Align
+	orr	r0, r0, #0x00001000	@ set bit 12 (I) I-Cache
+	mcr	p15, 0, r0, c1, c0, 0
+
+	/*
+	 * before relocating, we have to setup RAM timing
+	 * because memory timing is board-dependend, you will
+	 * find a lowlevel_init.S in your board directory.
+	 */
+	mov	ip, lr
+	bl	lowlevel_init
+	mov	lr, ip
+	mov	pc, lr
+
Index: u-boot/board/neo1973/common/lowlevel_foo.lds
===================================================================
--- /dev/null
+++ u-boot/board/neo1973/common/lowlevel_foo.lds
@@ -0,0 +1,56 @@
+/*
+ * (C) Copyright 2002
+ * Gary Jennejohn, DENX Software Engineering, <[e-mail]>
+ *
+ * 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-littlearm", "elf32-littlearm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+SECTIONS
+{
+	. = 0x00000000;
+
+	. = ALIGN(4);
+	.text      :
+	{
+	  lowlevel_foo.o (.text)
+	  *(.text)
+	}
+
+	. = ALIGN(4);
+	.rodata : { *(.rodata) }
+
+	. = ALIGN(4);
+	.data : { *(.data) }
+
+	. = ALIGN(4);
+	.got : { *(.got) }
+
+	. = .;
+	__u_boot_cmd_start = .;
+	.u_boot_cmd : { *(.u_boot_cmd) }
+	__u_boot_cmd_end = .;
+
+	. = ALIGN(4);
+	__bss_start = .;
+	.bss : { *(.bss) }
+	_end = .;
+}
Index: u-boot/board/neo1973/gta01/Makefile
===================================================================
--- u-boot.orig/board/neo1973/gta01/Makefile
+++ u-boot/board/neo1973/gta01/Makefile
@@ -28,14 +28,31 @@
 OBJS	:= gta01.o pcf50606.o ../common/cmd_neo1973.o ../common/jbt6k74.o ../common/udc.o
 SOBJS	:= ../common/lowlevel_init.o
 
+.PHONY:	all
+
+all:	$(LIB) lowevel_foo.bin
+
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $(OBJS) $(SOBJS)
 
+lowlevel_foo.o:	../common/lowlevel_foo.S
+	$(CC) -c -DTEXT_BASE=0x33F80000 -march=armv4 \
+	  -o lowlevel_foo.o ../common/lowlevel_foo.S
+
+lowlevel_foo:	lowlevel_foo.o ../common/lowlevel_init.o ../common/lowlevel_foo.lds
+	$(LD) -T ../common/lowlevel_foo.lds -Ttext 0x33f80000 -Bstatic \
+	  ../common/lowlevel_init.o lowlevel_foo.o -o lowlevel_foo
+
+lowevel_foo.bin:	lowlevel_foo
+	$(CROSS_COMPILE)objcopy --gap-fill=0xff -O binary \
+	  lowlevel_foo lowlevel_foo.bin
+
+
 clean:
-	rm -f $(SOBJS) $(OBJS)
+	rm -f $(SOBJS) $(OBJS) lowlevel_foo lowlevel_foo.o
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak .depend lowlevel_foo.bin
 
 #########################################################################
 
Index: u-boot/board/qt2410/Makefile
===================================================================
--- u-boot.orig/board/qt2410/Makefile
+++ u-boot/board/qt2410/Makefile
@@ -28,14 +28,31 @@
 OBJS	:= qt2410.o flash.o
 SOBJS	:= lowlevel_init.o
 
+.PHONY:	all
+
+all:	$(LIB) lowevel_foo.bin
+
 $(LIB):	$(OBJS) $(SOBJS)
 	$(AR) crv $@ $(OBJS) $(SOBJS)
 
+lowlevel_foo.o:	../neo1973/common/lowlevel_foo.S
+	$(CC) -c -DTEXT_BASE=0x33F80000 -march=armv4 \
+	  -o lowlevel_foo.o ../neo1973/common/lowlevel_foo.S
+
+lowlevel_foo:	lowlevel_foo.o lowlevel_init.o \
+		../neo1973/common/lowlevel_foo.lds
+	$(LD) -T ../neo1973/common/lowlevel_foo.lds -Ttext 0x33f80000 -Bstatic \
+          lowlevel_init.o lowlevel_foo.o -o lowlevel_foo
+
+lowevel_foo.bin:	lowlevel_foo
+	$(CROSS_COMPILE)objcopy --gap-fill=0xff -O binary \
+	  lowlevel_foo lowlevel_foo.bin
+
 clean:
-	rm -f $(SOBJS) $(OBJS)
+	rm -f $(SOBJS) $(OBJS) lowlevel_foo lowlevel_foo.o
 
 distclean:	clean
-	rm -f $(LIB) core *.bak .depend
+	rm -f $(LIB) core *.bak .depend lowlevel_foo.bin
 
 #########################################################################