flash/nor, contrib/loaders: move numicro M4 write assembly to contrib/loaders

Simply move numicro M4 flash write assembly to contrib/loaders. Also,
add corresponding Makefile and generated numicro_m4.inc.

Signed-off-by: Jian-Hong Pan <chienhung.pan@gmail.com>
Change-Id: I22b8be0a245857335b11bd0b538db415fc34748d
Reviewed-on: https://review.openocd.org/c/openocd/+/7343
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>

contrib/loaders/flash/numicro_m4/Makefile

@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+BIN2C = ../../../../src/helper/bin2char.sh
+
+CROSS_COMPILE ?= arm-none-eabi-
+
+CC=$(CROSS_COMPILE)gcc
+OBJCOPY=$(CROSS_COMPILE)objcopy
+OBJDUMP=$(CROSS_COMPILE)objdump
+
+
+AFLAGS = -static -nostartfiles -mlittle-endian -mcpu=cortex-m4 -Wa,-EL
+
+all: numicro_m4.inc
+
+.PHONY: clean
+
+%.elf: %.S
+	$(CC) $(AFLAGS) $< -o $@
+
+%.lst: %.elf
+	$(OBJDUMP) -S $< > $@
+
+%.bin: %.elf
+	$(OBJCOPY) -Obinary $< $@
+
+%.inc: %.bin
+	$(BIN2C) < $< > $@
+
+clean:
+	-rm -f *.elf *.lst *.bin *.inc

contrib/loaders/flash/numicro_m4/numicro_m4.S

@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+/***************************************************************************
+ *   Copyright (C) 2017 Zale Yu                                            *
+ *   CYYU@nuvoton.com                                                      *
+ *                                                                         *
+ *   Copyright (C) 2022 Jian-Hong Pan                                      *
+ *   chienhung.pan@gmail.com                                               *
+ ***************************************************************************/
+
+	.text
+	.cpu cortex-m4
+	.thumb
+
+	/* Params:
+	 * r0 - workarea buffer / result
+	 * r1 - target address
+	 * r2 - wordcount
+	 * Clobbered:
+	 * r4 - tmp
+	 * r5 - tmp
+	 * r6 - tmp
+	 * r7 - tmp
+	 */
+
+.L1:
+	/* for(register uint32_t i=0;i<wcount;i++){ */
+	mov	r4, r0
+	mov	r3, #0
+.L2:
+	sub	r5, r1, r0
+	add	r7, r4, r5
+	cmp	r3, r2
+	beq	.L7
+.L4:
+	/* NUMICRO_FLASH_ISPADR = faddr; */
+	ldr	r6, .L8
+	str	r7, [r6]
+	/* NUMICRO_FLASH_ISPDAT = *pLW; */
+	ldmia	r4!, {r7}
+	ldr	r5, .L8+4
+	str	r7, [r5]
+	/* faddr += 4; */
+	/* pLW++; */
+	/*  Trigger write action  */
+	/* NUMICRO_FLASH_ISPTRG = ISPTRG_ISPGO; */
+	ldr	r5, .L8+8
+	mov	r6, #1
+	str	r6, [r5]
+.L3:
+	/* while((NUMICRO_FLASH_ISPTRG & ISPTRG_ISPGO) == ISPTRG_ISPGO){}; */
+	ldr	r7, [r5]
+	lsl	r7, r7, #31
+	bmi	.L3
+
+	add	r3, r3, #1
+	b	.L2
+.L7:
+	/* return (NUMICRO_FLASH_ISPCON & ISPCON_ISPFF); */
+	ldr	r3, .L8+12
+	ldr	r0, [r3]
+	mov	r1, #64
+	and	r0, r1
+.L9:
+	bkpt	#0
+.L8:
+	.word	0x4000C004
+	.word	0x4000C008
+	.word	0x4000C010
+	.word	0x4000C000

contrib/loaders/flash/numicro_m4/numicro_m4.inc

@@ -0,0 +1,5 @@
+/* Autogenerated with ../../../../src/helper/bin2char.sh */
+0x04,0x1c,0x00,0x23,0x0d,0x1a,0x67,0x19,0x93,0x42,0x0c,0xd0,0x08,0x4e,0x37,0x60,
+0x80,0xcc,0x08,0x4d,0x2f,0x60,0x08,0x4d,0x01,0x26,0x2e,0x60,0x2f,0x68,0xff,0x07,
+0xfc,0xd4,0x01,0x33,0xee,0xe7,0x05,0x4b,0x18,0x68,0x40,0x21,0x08,0x40,0x00,0xbe,
+0x04,0xc0,0x00,0x40,0x08,0xc0,0x00,0x40,0x10,0xc0,0x00,0x40,0x00,0xc0,0x00,0x40,