Add support for XLS6xx CPUs to the Fast Message Network (FMN)
configuration.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4785/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

The commit 2a37b1ae "MIPS: Netlogic: Move from u32 cpumask to cpumask_t"
breaks uniprocessor compilation on XLR with:

arch/mips/netlogic/xlr/setup.c: In function 'prom_init':
arch/mips/netlogic/xlr/setup.c:196:6: error: unused variable 'i'

Fix by defining 'i' only when CONFIG_SMP is defined.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4760/Signed-off-by: NJohn Crispin <blogic@openwrt.org>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

All architectures that use cmd_dtc do so in almost the same way. Create
a central build rule to avoid duplication. The one difference is that
most current uses of dtc build $(obj)/%.dtb from $(src)/dts/%.dts rather
than building the .dtb in the same directory as the .dts file. This
difference will be eliminated arch-by-arch in future patches.

MIPS is the exception here; it already uses the exact same rule as the
new common rule, so the duplicate is removed in this patch to avoid any
conflict. arch/mips changes courtesy of Ralf Baechle.

Update Documentation/kbuild to remove the explicit call to cmd_dtc from
the example, now that the rule exists in a centralized location.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Olof Johansson <olof@lixom.net>
Cc: Russell King <linux@arm.linux.org.uk>
Acked-by: NCatalin Marinas <catalin.marinas@arm.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: linux@lists.openrisc.net
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: linux-c6x-dev@linux-c6x.org
Cc: Mark Salter <msalter@redhat.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: microblaze-uclinux@itee.uq.edu.au
Cc: Chris Zankel <chris@zankel.net>
Cc: linux-xtensa@linux-xtensa.org
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>

On XLR/XLS, the cpu cores communicate with fast on-chip devices
(e.g. network accelerator, security engine etc.) using the Fast
Messaging Network(FMN). The FMN queues and credits needs to be
configured and intialized before it can be used.

The co-processor 2 on XLR/XLS CPU cores has registers for FMN access,
and the XLR/XLS has custom instructions for sending and loading
messages.  The FMN can deliver also per-cpu interrupts when messages
are available at the CPU.

This patch adds FMN initialization, adds interrupt setup and handling,
and also provides support for sending and receiving FMN messages.
Signed-off-by: NGanesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4468Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Create struct nlm_pic_irq for interrupts handled by the PIC.
This simplifies IRQ handling for multi-SoC as well as
the single SoC cases. Also split the setup of percpu and PIC
interrupts so that we can configure the PIC interrupts for
every node.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4467Signed-off-by: NJohn Crispin <blogic@openwrt.org>

There can be 1, 2 or 4 SoCs(nodes) in a multi-chip XLP board. Add an
option for multi-chip boards in case of XLP, and make the number of
nodes configurable.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4470Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Upto 4 Netlogic XLP SoCs can be connected over ICI links to form a
coherent multi-node system.  Each SoC has its own set of on-chip
devices including PIC.  To support this, add a per SoC stucture and
use it for the PIC and SYS block addresses instead of using global
variables.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4469Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Initial code to support more than 32 cpus. The platform CPU mask
is updated from 32-bit mask to cpumask_t. Convert places that use
cpu_/cpus_ functions to use cpumask_* functions.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4464Signed-off-by: NJohn Crispin <blogic@openwrt.org>

The cpuid was not passed into early_init_secondary even though the
comment indicated that it will be. Fix this.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4458Signed-off-by: NJohn Crispin <blogic@openwrt.org>

At this point early printk is available, so debugging device tree
issues is easier.
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4460Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Enable Speculative Unmap Enable bit, which will enable speculative L2
cache requests for unmapped memory. This should give better performance
for kernel code/data which is in KSEG0
Signed-off-by: NJayachandran C <jchandra@broadcom.com>
Patchwork: http://patchwork.linux-mips.org/patch/4461Signed-off-by: NJohn Crispin <blogic@openwrt.org>

The OHCI platform driver is suitable for use by the Netlogic XLR platform
so use this driver instead of the OHCI XLS platform driver.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

The EHCI platform driver is suitable for use by the Netlogic XLR platform
since there is nothing specific that the EHCI XLR platform driver does.
Signed-off-by: NFlorian Fainelli <florian@openwrt.org>
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

Provide a config option to embed a device tree for XLP evaluation
boards. This DTB will be used if the firmware does not pass in a
device tree pointer.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Patchwork: http://patchwork.linux-mips.org/patch/4103/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Add the serial ports to the device tree and remove the platform
code for adding them.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Patchwork: http://patchwork.linux-mips.org/patch/4098/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Add a basic DTS file netlogic/dts/nlm_xlp.dts which contains
memory, i2c devices, NOR flash and command line arguments.
Signed-off-by: NGanesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Patchwork: http://patchwork.linux-mips.org/patch/4100/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

Move the function device_tree_init() from netlogic/xlp/of.c
to setup.c, and remove the wrapper functions reserve_mem_mach()
and free_mem_mach().

Remove file netlogic/xlp/of.c, and the Makefile entry for it.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Patchwork: http://patchwork.linux-mips.org/patch/4097/Signed-off-by: NJohn Crispin <blogic@openwrt.org>

In prom_putchar(), wait for just the TX empty bit to clear in the
UART LSR.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Cc: Florian Fainelli <florian@openwrt.org>
Patchwork: https://patchwork.linux-mips.org/patch/4112/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

[ralf@linux-mips.org: I've folded most segments of this patch into those
patches in -next that originally were causing the whitespace damage.
This is just what's left over]
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/4094/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Probe and add devices on SoC "simple-bus" on startup. This will
in turn add devices like I2C controller that are specified in the
device tree under 'soc'.
Signed-off-by: NGanesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3762/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add IRT to IRQ translation for the MMC and I2C IRQs.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3761/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The XLP USB controller appears as a device on the internal SoC PCIe
bus, the block has 2 EHCI blocks and 4 OHCI blocks. Change are to:

* Add files netlogic/xlp/usb-init.c and asm/netlogic/xlp-hal/usb.h
  to initialize the USB controller and define PCI fixups. The PCI
  fixups are to setup interrupts and DMA mask.
* Update include/asm/xlp-hal/{iomap.h,pic.h,xlp.h} to add interrupt
  mapping for EHCI/OHCI interrupts.
Signed-off-by: NGanesan Ramalingam <ganesanr@netlogicmicro.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3756/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Adds support for the XLP on-chip PCIe controller. On XLP, the
on-chip devices(including the 4 PCIe links) appear in the PCIe
configuration space of the XLP as PCI devices.

The changes are to initialize and register the PCIe controller,
enable hardware byte swap in the PCIe IO and MEM space, and to
enable PCIe interrupts.
Signed-off-by: NGanesan Ramalingam <ganesanr@netlogicmicro.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3760/
Patchwork: https://patchwork.linux-mips.org/patch/4104/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add platform code for XLR/XLS I2C controller and devices. Add
devices on the I2C bus on the XLR/XLS developement boards.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3757/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Changes to add support for the boot NOR flash on XLR boards and the
boot NAND/NOR flash drivers on the XLS boards.
Signed-off-by: NGanesan Ramalingam <ganesanr@netlogicmicro.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3758/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add USB initialization code, setup resources and add USB platform
driver in mips/netlogic/xlr/platform.c.
Add USB support for XLR/XLS platform in Kconfig.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3759/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Remove NETLOGIC_ prefix from gpio register definitions, this will
bring it in-line with the other Netlogic headers.

Having NETLOGIC prefix here is misleading because these are XLR/XLS
specific register definitions.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3754/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Update for core intialization code.  Initialize status register
after receiving NMI for CPU wakeup. Add the low level L1D flush
code before enabling threads in core.

Also convert the ehb to _ehb so that it works under more GCC
versions.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3755/
Patchwork: https://patchwork.linux-mips.org/patch/4095/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

No change in logic, comments update and whitespace cleanup.

* A few comments in the file were in assembler style and the rest
  int C style, convert all of them to C style.
* Mark workarounds for Ax silicon with a macro XLP_AX_WORKAROUND
* Whitespace fixes - use tabs consistently
* rename __config_lsu macro to xlp_config_lsu
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3749/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This code is not common enough to be in a shared file.  It is also not
used by any existing boards, so just remove it.

[ralf@linux-mips.org: Dropped removal of irq_create_of_mapping which was
already removed by abd2363f
[irq_domain/mips: Allow irq_domain on MIPS].  Moved device_tree_init() and
dependencies to its sole user, the XLP code.]
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: grant.likely@secretlab.ca
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2946/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Starting other threads in the core will change the number of
TLB entries of a CPU.  Re-calculate current_cpu_data.tlbsize
on the boot cpu after enabling and waking up other threads.

The secondary CPUs do not need this logic because the threads
are enabled on the secondary cores at wakeup and before cpu_probe.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3751/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

This has been obsolescent for a while; time for the final push.

In adjacent context, replaced old cpus_* with cpumask_*.
Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
Acked-by: David S. Miller <davem@davemloft.net> (arch/sparc)
Acked-by: Chris Metcalf <cmetcalf@tilera.com> (arch/tile)
Cc: user-mode-linux-devel@lists.sourceforge.net
Cc: Russell King <linux@arm.linux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: linux-hexagon@vger.kernel.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: Kyle McMartin <kyle@mcmartin.ca>
Cc: Helge Deller <deller@gmx.de>
Cc: sparclinux@vger.kernel.org

Disintegrate asm/system.h for MIPS.
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Acked-by: NRalf Baechle <ralf@linux-mips.org>
cc: linux-mips@linux-mips.org

Netlogic XLR chip has multiple cores. Each core includes four integrated
hardware threads, and they share L1 data and instruction caches.

If the chip is marked to be SMT capable, scheduler then could do more, say,
idle load balancing.

Changes are now confined only to the code of XLR, and hardware is probed
to get core ID for correct setup.

[jayachandranc: simplified and adapted for new merged XLR/XLP code]
Signed-off-by: NHillf Danton <dhillf@gmail.com>
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2972/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Add new processor ID to asm/cpu.h and kernel/cpu-probe.c.
Update to new CPU frequency detection code which works on XLP 3XX
and 8XX.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2971/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

Create a common NMI and reset handler in smpboot.S and use this for
both XLR and XLP.  In the earlier code, the woken up CPUs would
busy wait until released, switch this to wakeup by NMI.

The initial wakeup code or XLR and XLP are differ since they are
started from different bootloaders (XLP from u-boot and XLR from
netlogic bootloader). But in both platforms the woken up CPUs wait
and are released by sending an NMI.

Add support for starting XLR and XLP in 1/2/4 threads per core.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2970/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

- Add CPU_XLP and NLM_XLR_BOARD to arch/mips/Kconfig for Netlogic XLP boards
- Update mips Makefiles to add XLP
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2968/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

- Update common files to support XLP.
- Add arch/mips/include/asm/netlogic/xlp-hal for register definitions
  and access macros
- Add arch/mips/netlogic/xlp/ for XLP specific files.
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2967/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

- Move code that can be shared with XLP (irq.c, smp.c, time.c and
  xlr_console.c) to arch/mips/netlogic/common
- Add asm/netlogic/haldefs.h and asm/netlogic/common.h for common and
  io functions shared with XLP
- remove type 'nlm_reg_t *' and use uint64_t for mmio offsets
- Move XLR specific code in smp.c to xlr/wakeup.c
- Move XLR specific PCI code from irq.c to mips/pci/pci-xlr.c
- Provide API for pic functions called from common/irq.c
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2964/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

The -Werror compilation flag is already set for arch/mips - it can be removed
from arch/mips/xlr/Makefile
Signed-off-by: NJayachandran C <jayachandranc@netlogicmicro.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2963/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>