On 17/06/13 18:04, Kipisz, Steven wrote:
<snip>
I'll look at that thanks.
But I've taken a slightly different approach, and added the following to the start of s_init() ...
void s_init(void) { unsigned short *p = (unsigned short*)0x08000000; while (1) { int i; for (i = 0; i < (1 * 1024); i++) { unsigned short d = p[i]; d++; *p = d; } } ...
AFAICT, that should just spin on reading/writing the NOR device, but I still get only an initial 350us burst on the CS0 line, and then nothing.
So I can only assume that the boot code isn't getting as far as s_init() at all !!
In start.S and low_levelinit.c, there are various uses of:-
#ifdef CONFIG_SPL_BUILD
Do any of these also need referencing with a CONFIG_NOR_BOOT ?
Mark J.
Do you have a u-boot.lds in board/ti/am335x? That should put s_init() earlier in the boot. Also, include/configs/am335x_evm.h should have /* Custom script for NOR */ #define CONFIG_SYS_LDSCRIPT "board/ti/am335x/u-boot.lds"
Yes ... I have both u-boot.lds in my board directory, and the reference to it in the config.
#define CONFIG_SYS_LDSCRIPT "board/newflow/nanobone/u-boot.lds"
Before using JTAG, take a look in System.map where s_init is located. For a multiplex NOR it should be in the first 64K of address space.
That all seems in order ...
08000000 T __image_copy_start 08000000 T _start 08000020 t _undefined_instruction 08000024 t _software_interrupt 08000028 t _prefetch_abort 0800002c t _data_abort 08000030 t _not_used 08000034 t _irq 08000038 t _fiq 0800003c t _pad 08000040 T _TEXT_BASE 08000040 T _end_vect 08000044 T _bss_start_ofs 08000048 T _bss_end_ofs 0800004c T _end_ofs 08000050 T IRQ_STACK_START_IN 08000054 t reset 08000094 T c_runtime_cpu_setup 080000b0 T cpu_init_cp15 080000e8 T cpu_init_crit 08000100 t undefined_instruction 08000160 t software_interrupt 080001c0 t prefetch_abort 08000220 t data_abort 08000280 t not_used 080002e0 t irq 08000340 t fiq 080003a0 T enable_board_pin_mux 08000444 t cpsw_control 08000448 T s_init <<<<<<<<<<<<<<<<<<<<<<<<< 08000464 t gpmc_mux 08000568 T board_init 080005d8 T board_late_init 0800060c T board_eth_init 0800076c T enable_gpmc_cs_config 080007e0 T gpmc_init ...