Messages in this thread | | | Date | Wed, 22 Jul 2015 11:17:09 +0200 | From | Maxime Coquelin <> | Subject | Re: [PATCH v2 1/3] ARM: STi: Add code to release secondary cores from holding pen. |
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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@linaro.org> > Acked-by: Maxime Coquelin <maxime.coquelin@st.com> > --- > 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
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