Hi Peter, On 06/09/2015 03:33 PM, Peter Griffin wrote:
Most upstream devs boot STi platform via JTAG which abuses the boot process by setting the PC of secondary cores directly. As a consquence, booting STi platforms via u-boot results in only the primary core being brought up as the code to manage the holding pen is not upstream. This patch adds the necessary code to bring the secondary cores out of the holding pen. It uses the cpu-release-addr DT property to get the address of the holding pen from the bootloader. With this patch booting upstream kernels via u-boot works correctly: [ 0.045456] CPU: Testing write buffer coherency: ok [ 0.045597] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000 [ 0.045734] Setting up static identity map for 0x40209000 - 0x40209098 [ 0.065047] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001 [ 0.065081] Brought up 2 CPUs [ 0.065089] SMP: Total of 2 processors activated (5983.43 BogoMIPS). [ 0.065092] CPU: All CPU(s) started in SVC mode. Signed-off-by: Peter Griffin <peter.griffin@xxxxxxxxxx> Acked-by: Maxime Coquelin <maxime.coquelin@xxxxxx> --- arch/arm/mach-sti/headsmp.S | 1 + arch/arm/mach-sti/platsmp.c | 55 ++++++++++++++++++++++++++++++++++++++++++--- arch/arm/mach-sti/smp.h | 2 ++ 3 files changed, 55 insertions(+), 3 deletions(-)
Applied to sti-soc-for-v4.3. Thanks! Maxime -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
