armv7m: Integrate build of checksum code

Add rules to build armv7m_crc.inc and include it via preprocessor.

Change-Id: I4482c7acb8454de28bdf210d9f06c0720ada490a
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-on: http://openocd.zylin.com/3474


Tested-by: jenkins
Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>

contrib/loaders/checksum/Makefile

+BIN2C = ../../../src/helper/bin2char.sh
+
+ARM_CROSS_COMPILE ?= arm-none-eabi-
+ARM_AS      ?= $(ARM_CROSS_COMPILE)as
+ARM_OBJCOPY ?= $(ARM_CROSS_COMPILE)objcopy
+
+arm: armv7m_crc.inc
+
+armv7m_%.elf: armv7m_%.s
+	$(ARM_AS) $< -o $@
+
+armv7m_%.bin: armv7m_%.elf
+	$(ARM_OBJCOPY) -Obinary $< $@
+
+armv7m_%.inc: armv7m_%.bin
+	$(BIN2C) < $< > $@
+
+clean:
+	-rm -f *.elf *.bin *.inc

contrib/loaders/checksum/armv7m_crc.inc

+/* Autogenerated with ../../../src/helper/bin2char.sh */
+0x02,0x46,0x00,0x20,0xc0,0x43,0x0a,0x4e,0x0b,0x46,0x00,0x24,0x0d,0xe0,0x11,0x5d,
+0x09,0x06,0x48,0x40,0x00,0x25,0x00,0x28,0x02,0xda,0x40,0x00,0x70,0x40,0x00,0xe0,
+0x40,0x00,0x01,0x35,0x08,0x2d,0xf6,0xd1,0x01,0x34,0x9c,0x42,0xef,0xd1,0x00,0xbe,
+0xb7,0x1d,0xc1,0x04,

src/target/armv7m.c

@@ -686,40 +686,8 @@ int armv7m_checksum_memory(struct target *target,
 	struct reg_param reg_params[2];
 	int retval;
 
-	/* see contrib/loaders/checksum/armv7m_crc.s for src */
-
 	static const uint8_t cortex_m_crc_code[] = {
-		/* main: */
-		0x02, 0x46,			/* mov		r2, r0 */
-		0x00, 0x20,			/* movs		r0, #0 */
-		0xC0, 0x43,			/* mvns		r0, r0 */
-		0x0A, 0x4E,			/* ldr		r6, CRC32XOR */
-		0x0B, 0x46,			/* mov		r3, r1 */
-		0x00, 0x24,			/* movs		r4, #0 */
-		0x0D, 0xE0,			/* b		ncomp */
-		/* nbyte: */
-		0x11, 0x5D,			/* ldrb		r1, [r2, r4] */
-		0x09, 0x06,			/* lsls		r1, r1, #24 */
-		0x48, 0x40,			/* eors		r0, r0, r1 */
-		0x00, 0x25,			/* movs		r5, #0 */
-		/* loop: */
-		0x00, 0x28,			/* cmp		r0, #0 */
-		0x02, 0xDA,			/* bge		notset */
-		0x40, 0x00,			/* lsls		r0, r0, #1 */
-		0x70, 0x40,			/* eors		r0, r0, r6 */
-		0x00, 0xE0,			/* b		cont */
-		/* notset: */
-		0x40, 0x00,			/* lsls		r0, r0, #1 */
-		/* cont: */
-		0x01, 0x35,			/* adds		r5, r5, #1 */
-		0x08, 0x2D,			/* cmp		r5, #8 */
-		0xF6, 0xD1,			/* bne		loop */
-		0x01, 0x34,			/* adds		r4, r4, #1 */
-		/* ncomp: */
-		0x9C, 0x42,			/* cmp		r4, r3 */
-		0xEF, 0xD1,			/* bne		nbyte */
-		0x00, 0xBE,			/* bkpt		#0 */
-		0xB7, 0x1D, 0xC1, 0x04	/* CRC32XOR:	.word	0x04c11db7 */
+#include "../../contrib/loaders/checksum/armv7m_crc.inc"
 	};
 
 	retval = target_alloc_working_area(target, sizeof(cortex_m_crc_code), &crc_algorithm);