On Tue, Feb 17, 2009 at 02:09:36PM -0800, Tony Lindgren wrote: > * Otto Solares <solca@xxxxxxxx> [090217 13:59]: > > On Tue, Feb 17, 2009 at 01:46:12PM -0800, Tony Lindgren wrote: > > > * Otto Solares <solca@xxxxxxxx> [090217 13:37]: > > > > Hi all! > > > > > > > > I want to make kexec work on current Nokia Internet Tablets but > > > > maybe someone here have a clue or better if a patch :) > > > > > > Do you need to patch anything for this, or does it work out of the box? > > > > Tried with l-o out of the box and tried too with this patch applied but same > > results so far: > > > > http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=commit;h=6cd8dd766aec17ce66aa4f732928d05534da0937 > > > > Although it seems it was reverted here: > > > > http://kernel.ubuntu.com/git?p=ubuntu/ubuntu-jaunty.git;a=commit;h=484b70239a16c01d706a82e5e4afe2f82f24d950 > > OK, thanks for the links. > > > > > When I run a kexec enabled linux-omap kernel and try to boot the > > > > production Maemo kernel or a linux-omap kernel I only succeed if > > > > the serial-console flag in r&d mode is set, if not the device > > > > just hangs. > > > > > > Sounds like something does not get correctly initialized.. > > > > > > > It seems as a timing problem because if I insert small delays to > > > > the kexeced kernel via CONFIG_BOOT_PRINTK_DELAY it works too > > > > without the serial-console flag set. > > > > > > > > Any idea what to debug or where to start? > > > > > > Well since the LCD is on, you could write a little function that > > > writes the output to the LCD. You just need to find out the virtual > > > address of the LCD and then add a function for displaying fonts.. > > > Pretty easy to do. > > > > Ok, btw do you known a function name I should patch with the debugging > > output? > > We have the DEBUG_LL patch in l-o tree that's for low-level debug > output to serial port. You could could add a function called > printlcd() and call that instead of printascii(). > > > > BTW, do you have some Maemo package for kexec? > > > > Nope, although I host a userland patch and the statically compiled binary > > here: > > > > http://guug.org/nit/kexec/ > > Great, it would be nice to switch between Maemo and whatever easily. > > Tony > --- a/kernel/printk.c > +++ b/kernel/printk.c > @@ -44,6 +44,10 @@ void asmlinkage __attribute__((weak)) early_printk(const char *fmt, ...) > > #define __LOG_BUF_LEN (1 << CONFIG_LOG_BUF_SHIFT) > > +#ifdef CONFIG_DEBUG_LL > +extern void printascii(char *); > +#endif > + > /* printk's without a loglevel use this.. */ > #define DEFAULT_MESSAGE_LOGLEVEL 4 /* KERN_WARNING */ > > @@ -668,6 +672,9 @@ asmlinkage int vprintk(const char *fmt, va_list args) > printed_len += vscnprintf(printk_buf + printed_len, > sizeof(printk_buf) - printed_len, fmt, args); > > +#ifdef CONFIG_DEBUG_LL > + printascii(printk_buf); > +#endif > > /* > * Copy the output into log_buf. If the caller didn't provide Cool! will try something when get home... thx! -otto -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
