Hi,
Maybe check the GCC option "-mno-unaligned-access"
$>cat arch/arm/cpu/armv7/config.mk # # (C) Copyright 2002 # Gary Jennejohn, DENX Software Engineering, garyj@denx.de # # SPDX-License-Identifier: GPL-2.0+ #
# On supported platforms we set the bit which causes us to trap on unaligned # memory access. This is the opposite of what the compiler expects to be # the default so we must pass in -mno-unaligned-access so that it is aware # of our decision. PF_NO_UNALIGNED := $(call cc-option, -mno-unaligned-access,) PLATFORM_CPPFLAGS += $(PF_NO_UNALIGNED)
Regards, Clement On Thu, 8 Nov 2018 at 13:16, SHEKHAR SINGH imsinghshekhar@gmail.com wrote:
Hi All,
We got the issue, actually our DDR only supports 32bit access, 16bit and 8bit access are not supported. Is there any compiler option or any u-boot option, we need to configure so that u-boot use 32 bit access only.
Thanks in advance. Regards Shekhar Singh
On Thu, Nov 1, 2018 at 7:14 PM SHEKHAR SINGH imsinghshekhar@gmail.com wrote:
Hi All,
I am new to U-boot. Currently, I am working on developing U-boot for a new SOC. The SOC has arm926ej-s as the core and is implemented on Xilinx FPGA with SD-card as the boot device. With current setup DDR is already initialized by FPGA and SD card can be accessed using direct addressing. We have added board files and SoC related files to the Uboot directory and is able to successfully compile and get some outputs on UART (debug console). Currently, we have added only support for GPIO and UART drivers.
SD Card : 0x00000000 - 0x007FFFFF SRAM : 0x90000000 - 0x90007FFF DDR : 0x40000000 - 0x43FFFFFF
We are facing some issue with the uboot booting. We are able to see the initial uboot prints and debug prints when the stack pointer is in SRAM, but after we relocate the code from SD card to DDR and change the stack pointer to DDR we are getting junk prints on the console. Can anyone help me or suggest me what we are doing wrong here? Thanks in advance for your help.
Please see the below UART Log:
initcall: 00005cdc initcall: 00009a84 initcall: 00005ccc initcall: 00005fbc initcall: 000060c0 initcall: 00000418 initcall: 00006090 initcall: 00005fb4 malloc_simple: size=18, ptr=18, limit=400: 90000b30 malloc_simple: size=54, ptr=6c, limit=400: 90000b48 malloc_simple: size=4, ptr=70, limit=400: 90000b9c uclass_find_device_by_seq: 0 -1 uclass_find_device_by_seq: 0 0
- -1 -1 'root_driver'
- not found
initcall: 00006088 initcall: 000010b0 initcall: 000004a8 initcall: 0000f77c env_init: Environment nowhere init done (ret=0) initcall: 00005f88 initcall: 0000f0dc initcall: 000147c0
U-Boot 2018.09 (Nov 01 2018 - 18:33:40 +0530)
initcall: 00005eac U-Boot code: 00000000 -> 00024604 BSS: -> 00030608 initcall: 00000438 CPU: SoC Version 0.01 CPU clock: 75MHz SDRAM clock: 75MHz initcall: 00006470 initcall: 00005f70 DRAM: initcall: 000010ec SDRAM Reg 000 : ffffffff EDAC Reg 004 : ffffffff SDRAM Reg 100 : ffffffff EDAC Reg 104 : ffffffff EMC Reg : 1ff initcall: 00006178 Monitor len: 00030608 Ram size: 04000000 gd->relocaddr : 44000000 Ram top: 44000000 initcall: 00005cfc initcall: 00006098 initcall: 00005d14 initcall: 000060a0 initcall: 00005e44 Reserving 193k for U-Boot at: 43fcf000 initcall: 00005e18 Reserving 1152k for malloc() at: 43eaf000 initcall: 00005f1c Reserving 80 Bytes for Board Info at: 43eaefb0 initcall: 000060a8 initcall: 00005de4 Reserving 200 Bytes for Global Data at: 43eaeee8 initcall: 00005d5c initcall: 000060b0 initcall: 000060c8 initcall: 000061f4 gd->relocaddr : 43FCF000 initcall: 00005d1c initcall: 000060dc
RAM Configuration: Bank #0: 40000000 64 MiB
DRAM: 64 MiB initcall: 00005d40 New Stack Pointer is: 43eaeec0 initcall: 00005ed8 initcall: 000060b8 initcall: 00005fd0 __image_copy_start : 00000000 __image_copy_end : 00024604 gd copied successfully to new gd... Relocation Offset is: 43fcf000 Relocating to Addr 43fcf000, new gd at 43eaeee8, sp at 43eaeec0 Current Stack Pointer 90000a60 rrrr ccccooooeeee4444eeeettttllll44445555ttttllll44445555ttttllll00006666eeeeaaaa 44445555))))ENABLE CACHESWARNING: Caches not enabled ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))----ooooaaaaccccuuuu 7777tttt((((BBBBnnnneeeeyyyy4444ffff----4444ffffffffmmmmoooo 44449999----44449999
ttttllll00005555eeeeaaaa 44444444))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))aaaaffff____iiiibbbbeeee0000
aaaaffff____iiiibbbbeeee0000---- ''''ttttiiii''''----ttttuuuuttttllll00001111eeeeaaaa 44440000))))IIII::::aaaaiiii
ttttllll0000aaaaeeeeaaaa 44449999))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555)))) nnnn RRRR----BBBB 4444ffffttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))MMC: ttttllll00006666eeeeaaaa 44445555))))nnnneeeellllnnnnoooonnnniiiimmmm oooommmmccccNNNNooooccccaaaa ::::ooooddddhhhhoooooooooooonnnniiiiEEEE::::ooooddddhhhhoooooooooooonnnntttt hhhhbbbb 44442222bbbb====00000000aaaaHHHH llllNNNN
eeeebbbb,,,,llll::::eeee BBBB mmmmeeeebbbb,,,,dddd::::eeee BBBB mmmmEEEE llll44442222 llll1111 4444ffff eeeeoooo uuuueeee BBBB mmmm""""EEEE eeeetttt 4444ffffEEEE eeeettttllll00006666eeeeaaaa 44445555))))ttttllll0000aaaaeeeeaaaa 44449999))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00008888eeeeaaaa 44447777))))In: iiii4444ffff
Out: iiii4444ffff
Err: iiii4444ffff
tttt uuuuoooorrrr3333aaaaaaaa cccctttt uuuuoooorrrr3333aaaaaaaa cccctttt uuuuoooorrrr3333aaaaaaaa ccccttttllll0000ddddeeeeaaaa 4444ffff))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))ttttllll00006666eeeeaaaa 44445555))))Net: ttttiiiiiiiiSSSSppppNo ethernet found. ttttllll00006666eeeeaaaa 44445555))))tttt uuuuoooorrrr3333aaaaaaaa cccc nnnnoooonnnneeeebbbbddddyyyy
nnnnoooobbbbcccc""""DDDDNNNN""""Uboot >Uboot > Uboot > Uboot > Uboot > Uboot > Uboot > Uboot >
Regards, Shekhar S