Boot header to work around broken bootloaders

Makefile

@@ -66,6 +66,24 @@ fel-boot.bin: fel-boot.elf
 fel-boot.sunxi: fel-boot.bin
 	mksunxiboot fel-boot.bin fel-boot.sunxi
 
+boot_head_sun3i.elf: boot_head_sun3i.S boot_head_sun3i.lds
+	$(CROSS_COMPILE)gcc  -g  -Os  -fpic -fno-common -fno-builtin -ffreestanding -nostdinc -mno-thumb-interwork -Wall -Wstrict-prototypes -fno-stack-protector -Wno-format-nonliteral -Wno-format-security -fno-toplevel-reorder  boot_head.S -nostdlib -o boot_head_sun3i.elf -T boot_head.lds -Wl,-N -DMACHID=0x1094
+
+boot_head_sun3i.bin: boot_head_sun3i.elf
+	$(CROSS_COMPILE)objcopy -O binary boot_head_sun3i.elf boot_head_sun3i.bin
+
+boot_head_sun4i.elf: boot_head.S boot_head.lds
+	$(CROSS_COMPILE)gcc  -g  -Os  -fpic -fno-common -fno-builtin -ffreestanding -nostdinc -mno-thumb-interwork -Wall -Wstrict-prototypes -fno-stack-protector -Wno-format-nonliteral -Wno-format-security -fno-toplevel-reorder  boot_head.S -nostdlib -o boot_head_sun4i.elf -T boot_head.lds -Wl,-N -DMACHID=0x1008
+
+boot_head_sun4i.bin: boot_head_sun4i.elf
+	$(CROSS_COMPILE)objcopy -O binary boot_head_sun4i.elf boot_head_sun4i.bin
+
+boot_head_sun5i.elf: boot_head.S boot_head.lds
+	$(CROSS_COMPILE)gcc  -g  -Os  -fpic -fno-common -fno-builtin -ffreestanding -nostdinc -mno-thumb-interwork -Wall -Wstrict-prototypes -fno-stack-protector -Wno-format-nonliteral -Wno-format-security -fno-toplevel-reorder  boot_head.S -nostdlib -o boot_head_sun5i.elf -T boot_head.lds -Wl,-N -DMACHID=0x102A
+
+boot_head_sun5i.bin: boot_head_sun5i.elf
+	$(CROSS_COMPILE)objcopy -O binary boot_head_sun5i.elf boot_head_sun5i.bin
+
 bootinfo: bootinfo.c
 
 .gitignore: Makefile

boot_head.S

+/*
+ * Boot header to work around broken Allwinner A1x boot loaders
+ *
+ *  Copyright (C) 2012 Henrik Nordstrom <henrik@henriknordstrom.net>
+ *
+ * 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
+ */
+
+_start:
+        ldr     r0, =0
+	ldr	r1, =MACHID
+	ldr	r2, =0x40000100
+	ldr	lr, =0x40008000
+	bx	lr

boot_head.lds

+     SECTIONS
+     {
+       . = 0x40007000;
+       .text : { *(.text) }
+     }
+
+