Hi all,
On my custom board, 66AK2H14 does not have DIMM part and only four DDR3 SDRAM chips are connected to 66AK2H14 without ECC.
Then I modified the source codes of the UBoot and built the UBoot using these commands.
mkae clean make k2hk_evm_config make u-boot-spi.gph
Then I programmed the u-boot-spi.gph(after renaming to nor.bin) into NOR Flash.
After setting the 66AK2H14 as SPI boot mode, I can saw the UBoot output information through UART port.
U-Boot SPL 2016.05-00230-g7b75190-dirty (Oct 15 2016 - 11:25:08) Debug Flag 06 Trying to boot from SPI U-Boot 2016.05-00230-g7b75190-dirty (Oct 15 2016 - 11:25:08 +0800) CPU: 66AK2Hx SR2.0 I2C: ready DRAM: DDR3 speed 1600 Before DDR3 config: DDR3A PGSR0 vaule is 0xB000001F After DDR3 config: DDR3A PGSR0 vaule is 0xB0000FFF DDR3 config done! Exit function ddr3_init!
It seems that the DDR3 is configured OK.
But the UBoot stops!
Then I traced the UBoot source codes and I found that it stops after finishing this line in the file \arch\arm\lib\crt0.S
#if ! defined(CONFIG_SPL_BUILD)
/*
* Set up intermediate environment (new sp and gd) and call
* relocate_code(addr_moni). Trick here is that we'll return
* 'here' but relocated.
*/
/*The UBoot stops after this line!*/
ldr sp, [r9, #GD_START_ADDR_SP] /* sp = gd->start_addr_sp */
#if defined(CONFIG_CPU_V7M) /* v7M forbids using SP as BIC destination */
mov r3, sp
bic r3, r3, #7
mov sp, r3
#else
bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
#endif
ldr r9, [r9, #GD_BD] /* r9 = gd->bd */
sub r9, r9, #GD_SIZE /* new GD is below bd */
adr lr, here
ldr r0, [r9, #GD_RELOC_OFF] /* r0 = gd->reloc_off */
add lr, lr, r0
#if defined(CONFIG_CPU_V7M)
orr lr, #1 /* As required by Thumb-only */
#endif
ldr r0, [r9, #GD_RELOCADDR] /* r0 = gd->relocaddr */
b relocate_code
here:
/*
* now relocate vectors
*/
bl relocate_vectors
/* Set up final (full) environment */
bl c_runtime_cpu_setup /* we still call old routine here */
#endif
My questions are:
1. How does this happen? Is the GD_START_ADDR_SP wrong? How to debug?
2. After I used this command make u-boot-spi.gph, it seems that it is SPL UBoot.
But why does the Uboot go to this line
ldr sp, [r9, #GD_START_ADDR_SP] /* sp = gd->start_addr_sp */
which CONFIG_SPL_BUILD is no defined?
Regards,
Feng
