On Wed, 2015-07-01 at 17:03 +0300, Alexey Brodkin wrote: > With new SMP-enabled CPUs with ARC HS38 cores and corresponding > support > in Linux kernel it's required to add basic SMP support in U-Boot. > > Currently we assume the one and only core starts execution after > power-on. So most of things in U-Boot is handled in UP mode. > > But when U-Boot is used for loading and starting Linux kernel right > before jumping to kernel's entry point U-Boot: > [1] Sets all slave cores to jump to the same address [kernel's entry > point] > [2] Really starts all slav cores > > In ARC's implemetation of SMP in Linux kernel all cores are supposed > to > run the same start-up code. But only core with ID 0 (master core) > processes further while others are looping waiting for master core to > complete some initialization. > > That means it's safe to un-pause slave cores and let them execute > kernel > - they will wait for master anyway. > > Signed-off-by: Alexey Brodkin <[email protected]> > Cc: Vineet Gupta <[email protected]> > --- > arch/arc/lib/bootm.c | 6 ++++++ > board/synopsys/axs101/axs101.c | 30 ++++++++++++++++++++++++++++++ > 2 files changed, 36 insertions(+)
Applied, thanks. -Alexey _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
