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upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/board/renesas/r0p7734/lowlevel_init.S

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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (C) 2011 Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
* Copyright (C) 2011 Renesas Solutions Corp.
*/
#include <config.h>
#include <asm/processor.h>
#include <asm/macro.h>
#include <asm/processor.h>
.global lowlevel_init
.text
.align 2
lowlevel_init:
/* WDT */
write32 WDTCSR_A, WDTCSR_D
/* MMU */
write32 MMUCR_A, MMUCR_D
write32 FRQCR2_A, FRQCR2_D
write32 FRQCR0_A, FRQCR0_D
write32 CS0CTRL_A, CS0CTRL_D
write32 CS1CTRL_A, CS1CTRL_D
write32 CS0CTRL2_A, CS0CTRL2_D
write32 CSPWCR0_A, CSPWCR0_D
write32 CSPWCR1_A, CSPWCR1_D
write32 CS1GDST_A, CS1GDST_D
# clock mode check
mov.l MODEMR, r1
mov.l @r1, r0
and #6, r0 /* Check 1 and 2 bit.*/
cmp/eq #2, r0 /* 0x02 is 533Mhz mode */
bt init_lbsc_533
init_lbsc_400:
write32 CSWCR0_A, CSWCR0_D_400
write32 CSWCR1_A, CSWCR1_D
bra init_dbsc3_400_pad
nop
.align 2
MODEMR: .long 0xFFCC0020
WDTCSR_A: .long 0xFFCC0004
WDTCSR_D: .long 0xA5000000
MMUCR_A: .long 0xFF000010
MMUCR_D: .long 0x00000004
FRQCR2_A: .long 0xFFC80008
FRQCR2_D: .long 0x00000000
FRQCR0_A: .long 0xFFC80000
FRQCR0_D: .long 0xCF000001
CS0CTRL_A: .long 0xFF800200
CS0CTRL_D: .long 0x00000020
CS1CTRL_A: .long 0xFF800204
CS1CTRL_D: .long 0x00000020
CS0CTRL2_A: .long 0xFF800220
CS0CTRL2_D: .long 0x00004000
CSPWCR0_A: .long 0xFF800280
CSPWCR0_D: .long 0x00000000
CSPWCR1_A: .long 0xFF800284
CSPWCR1_D: .long 0x00000000
CS1GDST_A: .long 0xFF8002C0
CS1GDST_D: .long 0x00000011
init_lbsc_533:
write32 CSWCR0_A, CSWCR0_D_533
write32 CSWCR1_A, CSWCR1_D
bra init_dbsc3_533_pad
nop
.align 2
CSWCR0_A: .long 0xFF800230
CSWCR0_D_533: .long 0x01120104
CSWCR0_D_400: .long 0x02120114
/* CSWCR0_D_400: .long 0x01160116 */
CSWCR1_A: .long 0xFF800234
CSWCR1_D: .long 0x077F077F
/* CSWCR1_D_400: .long 0x00120012 */
init_dbsc3_400_pad:
write32 DBPDCNT3_A, DBPDCNT3_D
wait_timer WAIT_200US_400
write32 DBPDCNT0_A, DBPDCNT0_D_400
write32 DBPDCNT3_A, DBPDCNT3_D0
write32 DBPDCNT1_A, DBPDCNT1_D
write32 DBPDCNT3_A, DBPDCNT3_D1
wait_timer WAIT_32MCLK
write32 DBPDCNT3_A, DBPDCNT3_D2
wait_timer WAIT_100US_400
write32 DBPDCNT3_A, DBPDCNT3_D3
wait_timer WAIT_16MCLK
write32 DBPDCNT3_A, DBPDCNT3_D4
wait_timer WAIT_200US_400
write32 DBPDCNT3_A, DBPDCNT3_D5
wait_timer WAIT_1MCLK
write32 DBPDCNT3_A, DBPDCNT3_D6
wait_timer WAIT_10KMCLK
bra init_dbsc3_ctrl_400
nop
.align 2
init_dbsc3_533_pad:
write32 DBPDCNT3_A, DBPDCNT3_D
wait_timer WAIT_200US_533
write32 DBPDCNT0_A, DBPDCNT0_D_533
write32 DBPDCNT3_A, DBPDCNT3_D0
write32 DBPDCNT1_A, DBPDCNT1_D
write32 DBPDCNT3_A, DBPDCNT3_D1
wait_timer WAIT_32MCLK
write32 DBPDCNT3_A, DBPDCNT3_D2
wait_timer WAIT_100US_533
write32 DBPDCNT3_A, DBPDCNT3_D3
wait_timer WAIT_16MCLK
write32 DBPDCNT3_A, DBPDCNT3_D4
wait_timer WAIT_200US_533
write32 DBPDCNT3_A, DBPDCNT3_D5
wait_timer WAIT_1MCLK
write32 DBPDCNT3_A, DBPDCNT3_D6
wait_timer WAIT_10KMCLK
bra init_dbsc3_ctrl_533
nop
.align 2
WAIT_200US_400: .long 40000
WAIT_200US_533: .long 53300
WAIT_100US_400: .long 20000
WAIT_100US_533: .long 26650
WAIT_32MCLK: .long 32
WAIT_16MCLK: .long 16
WAIT_1MCLK: .long 1
WAIT_10KMCLK: .long 10000
DBPDCNT0_A: .long 0xFE800200
DBPDCNT0_D_533: .long 0x00010245
DBPDCNT0_D_400: .long 0x00010235
DBPDCNT1_A: .long 0xFE800204
DBPDCNT1_D: .long 0x00000014
DBPDCNT3_A: .long 0xFE80020C
DBPDCNT3_D: .long 0x80000000
DBPDCNT3_D0: .long 0x800F0000
DBPDCNT3_D1: .long 0x800F1000
DBPDCNT3_D2: .long 0x820F1000
DBPDCNT3_D3: .long 0x860F1000
DBPDCNT3_D4: .long 0x870F1000
DBPDCNT3_D5: .long 0x870F3000
DBPDCNT3_D6: .long 0x870F7000
init_dbsc3_ctrl_400:
write32 DBKIND_A, DBKIND_D
write32 DBCONF_A, DBCONF_D
write32 DBTR0_A, DBTR0_D_400
write32 DBTR1_A, DBTR1_D_400
write32 DBTR2_A, DBTR2_D
write32 DBTR3_A, DBTR3_D_400
write32 DBTR4_A, DBTR4_D_400
write32 DBTR5_A, DBTR5_D_400
write32 DBTR6_A, DBTR6_D_400
write32 DBTR7_A, DBTR7_D
write32 DBTR8_A, DBTR8_D_400
write32 DBTR9_A, DBTR9_D
write32 DBTR10_A, DBTR10_D_400
write32 DBTR11_A, DBTR11_D
write32 DBTR12_A, DBTR12_D_400
write32 DBTR13_A, DBTR13_D_400
write32 DBTR14_A, DBTR14_D
write32 DBTR15_A, DBTR15_D
write32 DBTR16_A, DBTR16_D_400
write32 DBTR17_A, DBTR17_D_400
write32 DBTR18_A, DBTR18_D_400
write32 DBBL_A, DBBL_D
write32 DBRNK0_A, DBRNK0_D
write32 DBCMD_A, DBCMD_D0_400
write32 DBCMD_A, DBCMD_D1
write32 DBCMD_A, DBCMD_D2
write32 DBCMD_A, DBCMD_D3
write32 DBCMD_A, DBCMD_D4
write32 DBCMD_A, DBCMD_D5_400
write32 DBCMD_A, DBCMD_D6
write32 DBCMD_A, DBCMD_D7
write32 DBCMD_A, DBCMD_D8
write32 DBCMD_A, DBCMD_D9_400
write32 DBCMD_A, DBCMD_D10
write32 DBCMD_A, DBCMD_D11
write32 DBCMD_A, DBCMD_D12
write32 DBBS0CNT1_A, DBBS0CNT1_D
write32 DBPDNCNF_A, DBPDNCNF_D
write32 DBRFCNF0_A, DBRFCNF0_D
write32 DBRFCNF1_A, DBRFCNF1_D_400
write32 DBRFCNF2_A, DBRFCNF2_D
write32 DBRFEN_A, DBRFEN_D
write32 DBACEN_A, DBACEN_D
write32 DBACEN_A, DBACEN_D
/* Dummy read */
mov.l DBWAIT_A, r1
synco
mov.l @r1, r0
synco
/* Dummy read */
mov.l SDRAM_A, r1
synco
mov.l @r1, r0
synco
/* need sleep 186A0 */
bra init_pfc_sh7734
nop
.align 2
init_dbsc3_ctrl_533:
write32 DBKIND_A, DBKIND_D
write32 DBCONF_A, DBCONF_D
write32 DBTR0_A, DBTR0_D_533
write32 DBTR1_A, DBTR1_D_533
write32 DBTR2_A, DBTR2_D
write32 DBTR3_A, DBTR3_D_533
write32 DBTR4_A, DBTR4_D_533
write32 DBTR5_A, DBTR5_D_533
write32 DBTR6_A, DBTR6_D_533
write32 DBTR7_A, DBTR7_D
write32 DBTR8_A, DBTR8_D_533
write32 DBTR9_A, DBTR9_D
write32 DBTR10_A, DBTR10_D_533
write32 DBTR11_A, DBTR11_D
write32 DBTR12_A, DBTR12_D_533
write32 DBTR13_A, DBTR13_D_533
write32 DBTR14_A, DBTR14_D
write32 DBTR15_A, DBTR15_D
write32 DBTR16_A, DBTR16_D_533
write32 DBTR17_A, DBTR17_D_533
write32 DBTR18_A, DBTR18_D_533
write32 DBBL_A, DBBL_D
write32 DBRNK0_A, DBRNK0_D
write32 DBCMD_A, DBCMD_D0_533
write32 DBCMD_A, DBCMD_D1
write32 DBCMD_A, DBCMD_D2
write32 DBCMD_A, DBCMD_D3
write32 DBCMD_A, DBCMD_D4
write32 DBCMD_A, DBCMD_D5_533
write32 DBCMD_A, DBCMD_D6
write32 DBCMD_A, DBCMD_D7
write32 DBCMD_A, DBCMD_D8
write32 DBCMD_A, DBCMD_D9_533
write32 DBCMD_A, DBCMD_D10
write32 DBCMD_A, DBCMD_D11
write32 DBCMD_A, DBCMD_D12
write32 DBBS0CNT1_A, DBBS0CNT1_D
write32 DBPDNCNF_A, DBPDNCNF_D
write32 DBRFCNF0_A, DBRFCNF0_D
write32 DBRFCNF1_A, DBRFCNF1_D_533
write32 DBRFCNF2_A, DBRFCNF2_D
write32 DBRFEN_A, DBRFEN_D
write32 DBACEN_A, DBACEN_D
write32 DBACEN_A, DBACEN_D
/* Dummy read */
mov.l DBWAIT_A, r1
synco
mov.l @r1, r0
synco
/* Dummy read */
mov.l SDRAM_A, r1
synco
mov.l @r1, r0
synco
/* need sleep 186A0 */
bra init_pfc_sh7734
nop
.align 2
DBKIND_A: .long 0xFE800020
DBKIND_D: .long 0x00000005
DBCONF_A: .long 0xFE800024
DBCONF_D: .long 0x0D030A01
DBTR0_A: .long 0xFE800040
DBTR0_D_533:.long 0x00000004
DBTR0_D_400:.long 0x00000003
DBTR1_A: .long 0xFE800044
DBTR1_D_533:.long 0x00000003
DBTR1_D_400:.long 0x00000002
DBTR2_A: .long 0xFE800048
DBTR2_D: .long 0x00000000
DBTR3_A: .long 0xFE800050
DBTR3_D_533:.long 0x00000004
DBTR3_D_400:.long 0x00000003
DBTR4_A: .long 0xFE800054
DBTR4_D_533:.long 0x00050004
DBTR4_D_400:.long 0x00050003
DBTR5_A: .long 0xFE800058
DBTR5_D_533:.long 0x0000000F
DBTR5_D_400:.long 0x0000000B
DBTR6_A: .long 0xFE80005C
DBTR6_D_533:.long 0x0000000B
DBTR6_D_400:.long 0x00000008
DBTR7_A: .long 0xFE800060
DBTR7_D: .long 0x00000002 /* common value */
DBTR8_A: .long 0xFE800064
DBTR8_D_533:.long 0x0000000D
DBTR8_D_400:.long 0x0000000A
DBTR9_A: .long 0xFE800068
DBTR9_D: .long 0x00000002 /* common value */
DBTR10_A: .long 0xFE80006C
DBTR10_D_533:.long 0x00000004
DBTR10_D_400:.long 0x00000003
DBTR11_A: .long 0xFE800070
DBTR11_D: .long 0x00000008 /* common value */
DBTR12_A: .long 0xFE800074
DBTR12_D_533:.long 0x00000009
DBTR12_D_400:.long 0x00000008
DBTR13_A: .long 0xFE800078
DBTR13_D_533:.long 0x00000022
DBTR13_D_400:.long 0x0000001A
DBTR14_A: .long 0xFE80007C
DBTR14_D: .long 0x00070002 /* common value */
DBTR15_A: .long 0xFE800080
DBTR15_D: .long 0x00000003 /* common value */
DBTR16_A: .long 0xFE800084
DBTR16_D_533:.long 0x120A1001
DBTR16_D_400:.long 0x12091001
DBTR17_A: .long 0xFE800088
DBTR17_D_533:.long 0x00040000
DBTR17_D_400:.long 0x00030000
DBTR18_A: .long 0xFE80008C
DBTR18_D_533:.long 0x02010200
DBTR18_D_400:.long 0x02000207
DBBL_A: .long 0xFE8000B0
DBBL_D: .long 0x00000000
DBRNK0_A: .long 0xFE800100
DBRNK0_D: .long 0x00000001
DBCMD_A: .long 0xFE800018
DBCMD_D0_533: .long 0x1100006B
DBCMD_D0_400: .long 0x11000050
DBCMD_D1: .long 0x0B000000 /* common value */
DBCMD_D2: .long 0x2A004000 /* common value */
DBCMD_D3: .long 0x2B006000 /* common value */
DBCMD_D4: .long 0x29002004 /* common value */
DBCMD_D5_533: .long 0x28000743
DBCMD_D5_400: .long 0x28000533
DBCMD_D6: .long 0x0B000000 /* common value */
DBCMD_D7: .long 0x0C000000 /* common value */
DBCMD_D8: .long 0x0C000000 /* common value */
DBCMD_D9_533: .long 0x28000643
DBCMD_D9_400: .long 0x28000433
DBCMD_D10: .long 0x000000C8 /* common value */
DBCMD_D11: .long 0x29002384 /* common value */
DBCMD_D12: .long 0x29002004 /* common value */
DBBS0CNT1_A: .long 0xFE800304
DBBS0CNT1_D: .long 0x00000000
DBPDNCNF_A: .long 0xFE800180
DBPDNCNF_D: .long 0x00000200
DBRFCNF0_A: .long 0xFE8000E0
DBRFCNF0_D: .long 0x000001FF
DBRFCNF1_A: .long 0xFE8000E4
DBRFCNF1_D_533: .long 0x00000805
DBRFCNF1_D_400: .long 0x00000618
DBRFCNF2_A: .long 0xFE8000E8
DBRFCNF2_D: .long 0x00000000
DBRFEN_A: .long 0xFE800014
DBRFEN_D: .long 0x00000001
DBACEN_A: .long 0xFE800010
DBACEN_D: .long 0x00000001
DBWAIT_A: .long 0xFE80001C
SDRAM_A: .long 0x0C000000
init_pfc_sh7734:
write32 PFC_PMMR_A, PFC_PMMR_MODESEL1
write32 PFC_MODESEL1_A, PFC_MODESEL1_D
write32 PFC_PMMR_A, PFC_PMMR_MODESEL2
write32 PFC_MODESEL2_A, PFC_MODESEL2_D
write32 PFC_PMMR_A, PFC_PMMR_IPSR3
write32 PFC_IPSR3_A, PFC_IPSR3_D
write32 PFC_PMMR_A, PFC_PMMR_IPSR4
write32 PFC_IPSR4_A, PFC_IPSR4_D
write32 PFC_PMMR_A, PFC_PMMR_IPSR11
write32 PFC_IPSR11_A, PFC_IPSR11_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR0
write32 PFC_GPSR0_A, PFC_GPSR0_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR1
write32 PFC_GPSR1_A, PFC_GPSR1_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR2
write32 PFC_GPSR2_A, PFC_GPSR2_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR3
write32 PFC_GPSR3_A, PFC_GPSR3_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR4
write32 PFC_GPSR4_A, PFC_GPSR4_D
write32 PFC_PMMR_A, PFC_PMMR_GPSR5
write32 PFC_GPSR5_A, PFC_GPSR5_D
/* sleep 186A0 */
write32 GPIO2_INOUTSEL1_A, GPIO2_INOUTSEL1_D
write32 GPIO1_OUTDT1_A, GPIO1_OUTDT1_D
write32 GPIO2_INOUTSEL2_A, GPIO2_INOUTSEL2_D
write32 GPIO2_OUTDT2_A, GPIO2_OUTDT2_D
write32 GPIO4_INOUTSEL4_A, GPIO4_INOUTSEL4_D
write32 GPIO4_OUTDT4_A, GPIO4_OUTDT4_D
write32 CCR_A, CCR_D
stc sr, r0
mov.l SR_MASK_D, r1
and r1, r0
ldc r0, sr
rts
nop
.align 2
PFC_PMMR_A: .long 0xFFFC0000
/* MODESEL
* 28: Select IEBUS Group B
*/
PFC_MODESEL1_A: .long 0xFFFC004C
PFC_MODESEL1_D: .long 0x10000000
PFC_PMMR_MODESEL1: .long 0xEFFFFFFF
/* MODESEL
* 9: Select SCIF3 Group B
* 7: Select SCIF2 Group B
* 4: Select SCIF1 Group B
*/
PFC_MODESEL2_A: .long 0xFFFC0050
PFC_MODESEL2_D: .long 0x00000290
PFC_PMMR_MODESEL2: .long 0xFFFFFD6F
# Enable functios
# SD1_DAT2_A SD1_DAT1_A, SD1_DAT0_A,
# EXWAIT0, RDW/RW, SD1_CMD_A, SD1_WP_A,
# SD1_CD_A, TX3_B, RX3_B, CS1, D15
PFC_IPSR3_A: .long 0xFFFC0028
PFC_IPSR3_D: .long 0x09209248
PFC_PMMR_IPSR3: .long 0xF6DF6DB7
# Enable functios
# RMII0_MDIO_A , RMII0_MDC_A,
# RMII0_CRS_DV_A, RMII0_RX_ER_A,
# RMII0_TXD_EN_A, MII0_RXD1_A
PFC_IPSR4_A: .long 0xFFFC002C
PFC_IPSR4_D: .long 0x0001B6DB
PFC_PMMR_IPSR4: .long 0xFFFE4924
# Enable functios
# DACK1, DREQ1, SD1_DAT3_A, SD1_CLK_A, IERX_B,
# IETX_B, TX0_A, RMII0_TXD0_A,
# RMII0_TXD1_A, RMII0_TXD0_A, SDSEL, SDA0, SDA1, SCL1
PFC_IPSR11_A: .long 0xFFFC0048
PFC_IPSR11_D: .long 0x002C89B0
PFC_PMMR_IPSR11:.long 0xFFD3764F
PFC_GPSR0_A: .long 0xFFFC0004
PFC_GPSR0_D: .long 0xFFFFFFFF
PFC_PMMR_GPSR0: .long 0x00000000
PFC_GPSR1_A: .long 0xFFFC0008
PFC_GPSR1_D: .long 0x7FBF7FFF
PFC_PMMR_GPSR1: .long 0x80408000
PFC_GPSR2_A: .long 0xFFFC000C
PFC_GPSR2_D: .long 0xBFC07EDF
PFC_PMMR_GPSR2: .long 0x403F8120
PFC_GPSR3_A: .long 0xFFFC0010
PFC_GPSR3_D: .long 0xFFFFFFFF
PFC_PMMR_GPSR3: .long 0x00000000
PFC_GPSR4_A: .long 0xFFFC0014
#if 0 /* orig */
PFC_GPSR4_D: .long 0xFFFFFFFF
PFC_PMMR_GPSR4: .long 0x00000000
#else
PFC_GPSR4_D: .long 0xFBFFFFFF
PFC_PMMR_GPSR4: .long 0x04000000
#endif
PFC_GPSR5_A: .long 0xFFFC0018
PFC_GPSR5_D: .long 0x00000C01
PFC_PMMR_GPSR5: .long 0xFFFFF3FE
I2C_ICCR2_A: .long 0xFFC70001
I2C_ICCR2_D: .long 0x00
I2C_ICCR2_D1: .long 0x20
GPIO2_INOUTSEL1_A: .long 0xFFC41004
GPIO2_INOUTSEL1_D: .long 0x80408000
GPIO1_OUTDT1_A: .long 0xFFC41008 /* bit15: LED4, bit22: LED5 */
GPIO1_OUTDT1_D: .long 0x80408000
GPIO2_INOUTSEL2_A: .long 0xFFC42004
GPIO2_INOUTSEL2_D: .long 0x40000120
GPIO2_OUTDT2_A: .long 0xFFC42008
GPIO2_OUTDT2_D: .long 0x40000120
GPIO4_INOUTSEL4_A: .long 0xFFC44004
GPIO4_INOUTSEL4_D: .long 0x04000000
GPIO4_OUTDT4_A: .long 0xFFC44008
GPIO4_OUTDT4_D: .long 0x04000000
CCR_A: .long 0xFF00001C
CCR_D: .long 0x0000090B
SR_MASK_D: .long 0xEFFFFF0F