avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/renesas/ecovec/lowlevel_init.S

@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2011 Renesas Solutions Corp.
+ * Copyright (C) 2011 Nobuhiro Iwamatsu <nobuhiro.Iwamatsu.yj@renesas.com>
+ *
+ * board/renesas/ecovec/lowlevel_init.S
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <asm/processor.h>
+#include <asm/macro.h>
+#include <configs/ecovec.h>
+
+	.global	lowlevel_init
+
+	.text
+	.align	2
+
+lowlevel_init:
+
+	/* jump to CONFIG_ECOVEC_ROMIMAGE_ADDR if bit 1 of PVDR_A */
+	mov.l	PVDR_A, r1
+	mov.l	PVDR_D, r2
+	mov.b	@r1, r0
+	tst	r0, r2
+	bt	1f
+	mov.l	JUMP_A, r1
+	jmp	@r1
+	nop
+
+1:
+	/* Disable watchdog */
+	write16 RWTCSR_A, RWTCSR_D
+
+	/* MMU Disable */
+	write32 MMUCR_A, MMUCR_D
+
+	/* Setup clocks */
+	write32 PLLCR_A, PLLCR_D
+	write32 FRQCRA_A, FRQCRA_D
+	write32 FRQCRB_A, FRQCRB_D
+
+	wait_timer TIMER_D
+
+	write32 MMSELR_A, MMSELR_D
+
+	/* Srtup BSC */
+	write32 CMNCR_A, CMNCR_D
+	write32 CS0BCR_A, CS0BCR_D
+	write32 CS0WCR_A, CS0WCR_D
+
+	wait_timer TIMER_D
+
+	/* Setup SDRAM */
+	write32 DBPDCNT0_A,	DBPDCNT0_D0
+	write32 DBCONF_A,	DBCONF_D
+	write32 DBTR0_A,	DBTR0_D
+	write32 DBTR1_A,	DBTR1_D
+	write32 DBTR2_A,	DBTR2_D
+	write32 DBTR3_A,	DBTR3_D
+	write32 DBKIND_A,	DBKIND_D
+	write32 DBCKECNT_A,	DBCKECNT_D
+
+	wait_timer TIMER_D
+
+	write32 DBCMDCNT_A,	DBCMDCNT_D0
+	write32 DBMRCNT_A, DBMRCNT_D0
+	write32 DBMRCNT_A, DBMRCNT_D1
+	write32 DBMRCNT_A, DBMRCNT_D2
+	write32 DBMRCNT_A, DBMRCNT_D3
+	write32 DBCMDCNT_A, DBCMDCNT_D0
+	write32 DBCMDCNT_A, DBCMDCNT_D1
+	write32 DBCMDCNT_A, DBCMDCNT_D1
+	write32 DBMRCNT_A, DBMRCNT_D4
+	write32 DBMRCNT_A, DBMRCNT_D5
+	write32 DBMRCNT_A, DBMRCNT_D6
+
+	wait_timer TIMER_D
+
+	write32 DBEN_A, DBEN_D
+	write32 DBRFPDN1_A, DBRFPDN1_D
+	write32 DBRFPDN2_A, DBRFPDN2_D
+	write32 DBCMDCNT_A, DBCMDCNT_D0
+
+
+	/* Dummy read */
+	mov.l DUMMY_A ,r1
+	synco
+	mov.l @r1, r0
+	synco
+
+	mov.l SDRAM_A ,r1
+	synco
+	mov.l @r1, r0
+	synco
+	wait_timer TIMER_D
+
+	add #4, r1
+	synco
+	mov.l @r1, r0
+	synco
+	wait_timer TIMER_D
+
+	add #4, r1
+	synco
+	mov.l @r1, r0
+	synco
+	wait_timer TIMER_D
+
+	add #4, r1
+	synco
+	mov.l @r1, r0
+	synco
+	wait_timer TIMER_D
+
+	write32 DBCMDCNT_A, DBCMDCNT_D0
+	write32 DBCMDCNT_A, DBCMDCNT_D1
+	write32 DBPDCNT0_A, DBPDCNT0_D1
+	write32 DBRFPDN0_A, DBRFPDN0_D
+
+	wait_timer TIMER_D
+
+	write32 CCR_A, CCR_D
+
+	stc	sr, r0
+	mov.l	SR_MASK_D, r1
+	and	r1, r0
+	ldc	r0, sr
+
+	rts
+
+	.align	2
+
+PVDR_A:		.long	PVDR
+PVDR_D:		.long	0x00000001
+JUMP_A:		.long	CONFIG_ECOVEC_ROMIMAGE_ADDR
+TIMER_D:	.long	64
+RWTCSR_A:	.long	RWTCSR
+RWTCSR_D:	.long	0x0000A507
+MMUCR_A:	.long	MMUCR
+MMUCR_D:	.long	0x00000004
+PLLCR_A:	.long	PLLCR
+PLLCR_D:	.long	0x00004000
+FRQCRA_A:	.long	FRQCRA
+FRQCRA_D:	.long	0x8E003508
+FRQCRB_A:	.long	FRQCRB
+FRQCRB_D:	.long	0x0
+MMSELR_A:	.long	MMSELR
+MMSELR_D:	.long	0xA5A50000
+CMNCR_A:	.long	CMNCR
+CMNCR_D:	.long	0x00000013
+CS0BCR_A:	.long	CS0BCR
+CS0BCR_D:	.long	0x11110400
+CS0WCR_A:	.long	CS0WCR
+CS0WCR_D:	.long	0x00000440
+DBPDCNT0_A:	.long	DBPDCNT0
+DBPDCNT0_D0: .long	0x00000181
+DBPDCNT0_D1: .long	0x00000080
+DBCONF_A:	.long	DBCONF
+DBCONF_D:	.long	0x015B0002
+DBTR0_A:	.long 	DBTR0
+DBTR0_D:	.long 	0x03061502
+DBTR1_A:	.long	DBTR1
+DBTR1_D:	.long	0x02020102
+DBTR2_A:	.long	DBTR2
+DBTR2_D:	.long	0x01090305
+DBTR3_A:	.long	DBTR3
+DBTR3_D:	.long	0x00000002
+DBKIND_A:	.long	DBKIND
+DBKIND_D:	.long	0x00000005
+DBCKECNT_A:	.long	DBCKECNT
+DBCKECNT_D:	.long	0x00000001
+DBCMDCNT_A:	.long	DBCMDCNT
+DBCMDCNT_D0:.long	0x2
+DBCMDCNT_D1:.long	0x4
+DBMRCNT_A:	.long	DBMRCNT
+DBMRCNT_D0:	.long	0x00020000
+DBMRCNT_D1:	.long	0x00030000
+DBMRCNT_D2:	.long	0x00010040
+DBMRCNT_D3:	.long	0x00000532
+DBMRCNT_D4:	.long	0x00000432
+DBMRCNT_D5:	.long	0x000103C0
+DBMRCNT_D6:	.long	0x00010040
+DBEN_A:		.long	DBEN
+DBEN_D:		.long	0x01
+DBRFPDN0_A:	.long	DBRFPDN0
+DBRFPDN1_A:	.long	DBRFPDN1
+DBRFPDN2_A:	.long	DBRFPDN2
+DBRFPDN0_D:	.long	0x00010000
+DBRFPDN1_D:	.long	0x00000613
+DBRFPDN2_D:	.long	0x238C003A
+SDRAM_A:	.long	0xa8000000
+DUMMY_A:	.long	0x0c400000
+CCR_A:		.long	CCR
+CCR_D:		.long	0x0000090B
+SR_MASK_D:	.long	0xEFFFFF0F