David Jander wrote:
Hi again,
Hi David,
Are you sure? In arch/arm/lib/board.c function start_armboot(), init_sequence is processed first, which contains env_init() before dram_init() and just after completing init_sequence, mem_malloc_init() is called. How can you have working malloc then?
Well, I tried to investigate to see if I get the same issue, env_init is called before mem_malloc_init, but it does nothing (in env_sf.c):
int env_init(void) { /* SPI flash isn't usable before relocation */ gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 1;
return 0; }
And really I can see that mem_malloc_init() is called before spi_setup_slave(). I guess there is a different configuration on our targets, that makes the difference, but I do not know which one.
I don't know if that is possible. I know that physically RAM is initialized before u-boot even starts (it runs from RAM), but logically, dram_init() is called _after_ env_init(), so I'm not sure if you are supposed to call mem_malloc_init() in env_init()...
Yes, but as I see env_init does not read from flash and does not call spi_setup_flash(). This is done by env_relocate_spec(), but this function is called later.
I am slowly progressing... now the transfer succeeds, but I only read FF ;-)
I think I have a good status now. I can correctly read/write the whole flash. I have still an issue with saveenv (the first time does not work, and it works after I called "sf probe"...crazy, but probably depends on my target, I am investigating), but I should find a fix for that too.
A good point. I was following the premise that u-boot drivers should be simple, but a little bit of speed for booting is surely not a bad idea ;-)
Even using the whole FIFO I need about 8 Seconds to read the whole Flash (4 MB). In normal case, this means I need 3 Seconds for a kernel.
I am just now picking up where I left last week, so give me a few hours and I should have something working, I guess.
Ok. We can make a point later. As I said, things are not so bad on my target.
I always say: "Electronics work on smoke. If the smoke escapes, it stops working" :-)
;-)))
Best regards, Stefano