Introduce support for loading Flattened Image Trees, as used by modern
U-Boot. FIT images are essentially flattened device tree files which
contain binary images such as kernels, FDTs or ramdisks along with one
or more configuration nodes describing boot configurations.

The MIPS Boston board typically boots kernels in the form of FIT images,
and will make use of this code.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
[yongbok.kim@imgtec.com:
  fixed potential memory leaks,
  isolated building option]
Signed-off-by: NYongbok Kim <yongbok.kim@imgtec.com>

Add GIC to CPS and expose its interrupt pins instead of CPU's.
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

Make ITU available in the system if CPU supports multithreading
and is part of CPS.
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

Create Cluster Power Controller and add a link to the CPC MemoryRegion
in GCR. Guest can enable / map CPC to any physical address by writing to
the memory-mapped GCR_CPC_BASE register.

Set vp-start-reset property to 1 to allow only first VP to run from reset.
Others are brought up by the guest via CPC memory-mapped registers.
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

Implement generic MIPS Coherent Processing System (CPS) which in this
commit just creates VPs, but it will serve as a container also for
other components like Global Configuration Registers and Cluster Power
Controller.
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

The functions cpu_clone_regs() and cpu_set_tls() are not purely CPU
related -- they are specific to the TLS ABI for a a particular OS.
Move them into the linux-user/ tree where they belong.

target-lm32 had entirely unused implementations, since it has no
linux-user target; just drop them.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Acked-by: NRichard Henderson <rth@twiddle.net>
Signed-off-by: NAndreas Färber <afaerber@suse.de>

Instead of calling openrisc_env_get_cpu(), casting to CPU() via the
ENV_GET_CPU() compatibility macro and casting back to OPENRISC_CPU(),
just call openrisc_env_get_cpu() directly.

ENV_GET_CPU() is meant as workaround for target-independent code only.
Signed-off-by: NAndreas Färber <afaerber@suse.de>

Add OpenRISC exception support.
Signed-off-by: NJia Liu <proljc@gmail.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add OpenRISC interrupt support.
Signed-off-by: NJia Liu <proljc@gmail.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Add OpenRISC target stubs, QOM cpu and basic machine.
Signed-off-by: NJia Liu <proljc@gmail.com>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

Let's enable the basics for system emulation so we can run virtual machines
with KVM!
Signed-off-by: NAlexander Graf <agraf@suse.de>
Signed-off-by: NAurelien Jarno <aurelien@aurel32.net>