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>
Signed-off-by: Maxime Coquelin <maxime.coquelin@st.com>
This patch removes sti_secondary_start from _INIT section, there are 2
reason for this removal.
1. discarding such a small code does not save much, given the RAM
sizes.
2. Having this code discarded, creates corruption issue when we boot
smp-kernel with nrcpus=1 or with single cpu node in DT.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
The STiH415 is the next generation of HD, AVC set-top box processors for
satellite, cable, terrestrial and IP-STB markets. It is an ARM Cortex-A9
1.0 GHz, dual-core CPU.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
CC: Stephen Gallimore <stephen.gallimore@st.com>
CC: Stuart Menefy <stuart.menefy@st.com>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@st.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Peter Griffin
Srinivas Kandagatla