range.h: Move resource API and constant to respective files

range.h works with struct range data type. The resource_size_t
is an alien here.

(1) Move cap_resource() implementation into its only user, and
(2) rename and move RESOURCE_SIZE_MAX to limits.h.

Link: https://lkml.kernel.org/r/20230804064636.15368-1-andriy.shevchenko@linux.intel.com
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Change DEFINE_SEMAPHORE() to take a number argument

Fundamentally semaphores are a counted primitive, but
DEFINE_SEMAPHORE() does not expose this and explicitly creates a
binary semaphore.

Change DEFINE_SEMAPHORE() to take a number argument and use that in the
few places that open-coded it using __SEMAPHORE_INITIALIZER().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
[mcgrof: add some tribal knowledge about why some folks prefer
binary sempahores over mutexes]
Reviewed-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

MIPS: Fix comments typo

Remove the repeated word "as" in comments.

Signed-off-by: Shaomin Deng <dengshaomin@cdjrlc.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: octeon: Get rid of preprocessor directives around RESERVE32

Some of them were pointless because CONFIG_CAVIUM_RESERVE32 is now always
defined, some were not enough (Yu Zhao reported
"Failed to allocate CAVIUM_RESERVE32 memory area" error).

Removing the directives allows for compiler coverage of RESERVE32 code and
replacing one of [always-true] "ifdef" with a compiler conditional fixes
the [cosmetic] error message.

Fixes: 3e3114ac460e ("MIPS: Introduce CAVIUM_RESERVE32 Kconfig option")

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Revert "MIPS: octeon: Remove vestiges of CONFIG_CAVIUM_RESERVE32"

This reverts commit e98b461bb057aaea6fa766260788c08825213837.

We actually have been using the CONFIG_CAVIUM_RESERVE32 and previous patch
defined it in the corresponding Kconfig.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

mips: clean up kernel-doc in cavium-octeon/*.c

Convert function comments to kernel-doc notation to remove
kernel-doc warnings in arch/mips/cavium-octeon/*.c.
Also clean up the comments in a few places.

arch/mips/cavium-octeon/flash_setup.c:66: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Module/ driver initialization.
--
arch/mips/cavium-octeon/setup.c:308: warning: expecting prototype for Return non zero if we are currently running in the Octeon simulator(). Prototype was for octeon_is_simulation() instead
arch/mips/cavium-octeon/setup.c:314: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Return true if Octeon is in PCI Host mode. This means
arch/mips/cavium-octeon/setup.c:334: warning: expecting prototype for Get the clock rate of Octeon(). Prototype was for octeon_get_clock_rate() instead
arch/mips/cavium-octeon/setup.c:351: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Write to the LCD display connected to the bootbus. This display
arch/mips/cavium-octeon/setup.c:380: warning: expecting prototype for Return the console uart passed by the bootloader(). Prototype was for octeon_get_boot_uart() instead
arch/mips/cavium-octeon/setup.c:386: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Get the coremask Linux was booted on.
arch/mips/cavium-octeon/setup.c:399: warning: expecting prototype for Check the hardware BIST results for a CPU(). Prototype was for octeon_check_cpu_bist() instead
arch/mips/cavium-octeon/setup.c:432: warning: expecting prototype for Reboot Octeon(). Prototype was for octeon_restart() instead
arch/mips/cavium-octeon/setup.c:452: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Permanently stop a core.
arch/mips/cavium-octeon/setup.c:475: warning: expecting prototype for Halt the system(). Prototype was for octeon_halt() instead
arch/mips/cavium-octeon/setup.c:520: warning: expecting prototype for Return a string representing the system type(). Prototype was for octeon_board_type_string() instead
arch/mips/cavium-octeon/setup.c:661: warning: expecting prototype for Early entry point for arch setup(). Prototype was for prom_init() instead
--
arch/mips/cavium-octeon/smp.c:100: warning: Function parameter or member 'cpu' not described in 'octeon_send_ipi_single'
arch/mips/cavium-octeon/smp.c:100: warning: Function parameter or member 'action' not described in 'octeon_send_ipi_single'
arch/mips/cavium-octeon/smp.c:100: warning: expecting prototype for Cause the function described by call_data to be executed on the passed(). Prototype was for octeon_send_ipi_single() instead
arch/mips/cavium-octeon/smp.c:119: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* Detect available CPUs, populate cpu_possible_mask
arch/mips/cavium-octeon/smp.c:210: warning: Function parameter or member 'cpu' not described in 'octeon_boot_secondary'
arch/mips/cavium-octeon/smp.c:210: warning: Function parameter or member 'idle' not described in 'octeon_boot_secondary'
arch/mips/cavium-octeon/smp.c:210: warning: expecting prototype for Firmware CPU startup hook(). Prototype was for octeon_boot_secondary() instead
arch/mips/cavium-octeon/smp.c:236: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
* After we've done initial boot, this function is called to allow the
arch/mips/cavium-octeon/smp.c:258: warning: Function parameter or member 'max_cpus' not described in 'octeon_prepare_cpus'
arch/mips/cavium-octeon/smp.c:258: warning: expecting prototype for Callout to firmware before smp_init(). Prototype was for octeon_prepare_cpus() instead
arch/mips/cavium-octeon/smp.c:276: warning: expecting prototype for Last chance for the board code to finish SMP initialization before(). Prototype was for octeon_smp_finish() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Aditya Srivastava <yashsri421@gmail.com>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: linux-mips@vger.kernel.org
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: octeon: Remove vestiges of CONFIG_CAVIUM_RESERVE32

The config option CAVIUM_RESERVE32 is not used.
Remove the dead code controlled by it.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

Revert "MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y"

This reverts commit d9df9fb901d25b941ab2cfb5b570d91fb2abf7a3.

For the OCTEON boards, it need to patch the built-in DTB before using
it. Previously it judges if it is a built-in DTB by checking
fw_passed_dtb. But after commit 37e5c69ffd41 ("MIPS: head.S: Init
fw_passed_dtb to builtin DTB", the fw_passed_dtb is initialized even
when using built-in DTB. This causes the OCTEON boards boot broken due
to an unpatched built-in DTB is used. Revert the commit d9df9fb901d2 to
restore the codes before the fw_passed_dtb is used and then fix this
issue.

Fixed: 37e5c69ffd41 ("MIPS: head.S: Init fw_passed_dtb to builtin DTB")
Cc: stable@vger.kernel.org
Suggested-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: OCTEON: Don't add kernel sections into memblock allocator

Because check_kernel_sections_mem() does exactly this for all platforms.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: replace add_memory_region with memblock

add_memory_region was the old interface for registering memory and
was already changed to used memblock internaly. Replace it by
directly calling memblock functions.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

MIPS: Get rid of CAVIUM_OCTEON_DCACHE_PREFETCH_WAR

CAVIUM_OCTEON_DCACHE_PREFETCH_WAR is a check for Octeon model CN6XXXX.
By using the version check we can remove the define.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

remove ioremap_nocache and devm_ioremap_nocache

ioremap has provided non-cached semantics by default since the Linux 2.6
days, so remove the additional ioremap_nocache interface.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

mips/cavium-octeon: Fix typo *must* in comment

Fixes: 5b3b16880f ("MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.")
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Signed-off-by: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@vger.kernel.org

MIPS: OCTEON: Drop boot_mem_map

Replace walk through boot_mem_map with for_each_memblock.
And remove the check of total boot_mem_map.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: yasha.che3@gmail.com
Cc: aurelien@aurel32.net
Cc: sfr@canb.auug.org.au
Cc: fancer.lancer@gmail.com
Cc: matt.redfearn@mips.com
Cc: chenhc@lemote.com

MIPS: OCTEON: fix kexec support

Commit 62cac480f33f ("MIPS: kexec: Make a framework for both jumping and
halting on nonboot CPUs") broke the build of the OCTEON platform as
the relocated_kexec_smp_wait() is now static and not longer exported in
kexec.h.

Replace it by kexec_reboot() like it has been done in other places.

Fixes: 62cac480f33f ("MIPS: kexec: Make a framework for both jumping and halting on nonboot CPUs")
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Dengcheng Zhu <dzhu@wavecomp.com>
Cc: ralf@linux-mips.org
Cc: stable@vger.kernel.org # 4.20+

MIPS: OCTEON: setup: include asm/prom.h

Include arm/prom.h to get the declaration of device_tree_init().

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21202/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org

MIPS: OCTEON: setup: include asm/fw/fw.h

Include asm/fw/fw.h to get the declaration of fw_init_cmdline().

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21206/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org

MIPS: OCTEON: setup: make internal functions and data static

Make some internal data and functions static to avoid sparse warnings.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/21211/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org

MIPS: Octeon: Remove special handling of CONFIG_MIPS_ELF_APPENDED_DTB=y

The ELF appended dtb can be accessed now via 'fw_passed_dtb'.

Since raw appended dtb is accessed via that variable too,
this now effectively allows to boot with CONFIG_MIPS_RAW_APPENDED_DTB=y
on Octeon.

Signed-off-by: Yasha Cherikovsky <yasha.che3@gmail.com>
[paul.burton@mips.com: Fix trivial __dtb_octeon_*_begin conflict]
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/20805/
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@mips.com>
Cc: James Hogan <jhogan@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org

MIPS: Octeon: Remove extern declarations.

Get rid of extern declarations in .c functions and included
the necessary header file. Also remove unused UART declares.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19477/
Cc: linux-mips@linux-mips.org

mips: unify prom_putchar() declarations

prom_putchar() is used centrally in early printk infrastructure therefore
at least MIPS should agree on the function return type.

[paul.burton@mips.com:
- Include linux/types.h in asm/setup.h to gain the bool typedef before
we start include asm/setup.h elsewhere.
- Include asm/setup.h in all files that use or define prom_putchar().
- Also standardise on signed rather than unsigned char argument.]

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19842/
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Jonas Gorski <jonas.gorski@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>
Cc: Philippe Ombredanne <pombredanne@nexb.com>

MIPS: Octeon: Remove vestiges of CONFIG_CAVIUM_OCTEON_2ND_KERNEL

This config option never really worked, and has bit-rotted to the
point of being completely useless. Remove it completely.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Steven J. Hill <steven.hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15314/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Add plat_get_fdt() function for Cavium platforms.

Add in the function needed for Octeon platforms to support KASLR.

Signed-off-by: Steven J. Hill <Steven.Hill@cavium.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Add fw_init_cmdline() for Cavium platforms.

Add platform-specific kernel command line processing for Octeon.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14599/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

mips/panic: replace smp_send_stop() with kdump friendly version in panic path

Daniel Walker reported problems which happens when
crash_kexec_post_notifiers kernel option is enabled
(https://lkml.org/lkml/2015/6/24/44).

In that case, smp_send_stop() is called before entering kdump routines
which assume other CPUs are still online. As the result, kdump
routines fail to save other CPUs' registers. Additionally for MIPS
OCTEON, it misses to stop the watchdog timer.

To fix this problem, call a new kdump friendly function,
crash_smp_send_stop(), instead of the smp_send_stop() when
crash_kexec_post_notifiers is enabled. crash_smp_send_stop() is a
weak function, and it just call smp_send_stop(). Architecture
codes should override it so that kdump can work appropriately.
This patch provides MIPS version.

Fixes: f06e5153f4ae (kernel/panic.c: add "crash_kexec_post_notifiers" option)
Link: http://lkml.kernel.org/r/20160810080950.11028.28000.stgit@sysi4-13.yrl.intra.hitachi.co.jp
Signed-off-by: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com>
Reported-by: Daniel Walker <dwalker@fifo99.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Xunlei Pang <xpang@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Toshi Kani <toshi.kani@hpe.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Daney <david.daney@cavium.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: "Steven J. Hill" <steven.hill@cavium.com>
Cc: Corey Minyard <cminyard@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

MIPS: Octeon: Rename upper case variables at setup time.

Rename upper case variables.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Sivasubramanian Palanisamy <sivasubramanian.palanisamy@nokia.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13352/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Take all memory into use by default.

Take all memory into use by default, instead of limiting to 512 MB.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Sivasubramanian Palanisamy <sivasubramanian.palanisamy@nokia.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13353/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Changes to support readq()/writeq() usage.

Update OCTEON port mangling code to support readq() and
writeq() functions to allow driver code to be more portable.
Updates also for word and long function pairs. We also
remove SWAP_IO_SPACE for OCTEON platforms as the function
macros are redundant with the new mangling code.

Signed-off-by: Steven J. Hill <steven.hill@cavium.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13780/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: device_tree_init: fill mac addresses when using appended dtb

Fill MAC addresses from bootinfo when using appended DTB.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12590/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: device_tree_init: use separate pass to fill mac addresses

Use separate pass to fill MAC addresses. This is needed because we want
to do this also for the appended DTB.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12588/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Use model string from DTB for unknown board type

Use model string from DTB for board type if the board is unknown.
This is more informative, e.g. with EdgeRouter Pro the /proc/cpuinfo
will display "ubnt,e200 (CN6120p1.1-1000-NSP)" instead of misleading
"Unsupported Board".

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12582/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Initialize system type string after device tree init.

Initialize system type string after device tree init.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12583/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: board_type_to_string: return NULL for unsupported board

Return NULL for unsupported board.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12581/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Add SMP support for OCTEON cn78xx et al.

OCTEON chips with the CIU3 interrupt controller use a different IPI
mechanism that previous models.

Add plat_smp_ops for the cn78xx and probing code to choose between the
two types of ops.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12499/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Don't attempt to use nonexistent registers on OCTEON III models.

Attempts to read the nonexistent registers results in bus errors.
Either use registers that exist, or don't do the access as appropriate.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12502/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Extend number of supported CPUs past 32

To support more than 48 CPUs, the bootinfo structure grows a new
coremask structure. Add the definition of the structure and add it to
struct cvmx_bootinfo. In prom_init(), copy the new coremask data into
the sysinfo structure, and use it in smp_setup().

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12319/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Support APPENDED_DTB

Use appended DTB when available.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nokia.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/11115/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Fix kernel panic on startup from memory corruption

During development it was found that a number of builds would panic
during the kernel init process, more specifically in 'delayed_fput()'.
The panic showed the kernel trying to access a memory address of
'0xb7fdc00' while traversing the 'delayed_fput_list' structure.
Comparing this memory address to the value of the pointer used on
builds that did not panic confirmed that the pointer on crashing
builds must have been corrupted at some stage earlier in the init
process.

By traversing the list earlier and earlier in the code it was found
that 'plat_mem_setup()' was responsible for corrupting the list.
Specifically the line:

memory = cvmx_bootmem_phy_alloc(mem_alloc_size,
__pa_symbol(&__init_end), -1,
0x100000,
CVMX_BOOTMEM_FLAG_NO_LOCKING);

Which would eventually call:

cvmx_bootmem_phy_set_size(new_ent_addr,
cvmx_bootmem_phy_get_size
(ent_addr) -
(desired_min_addr -
ent_addr));

Where 'new_ent_addr'=0x4800000 (the address of 'delayed_fput_list')
and the second argument (size)=0xb7fdc00 (the address causing the
kernel panic). The job of this part of 'plat_mem_setup()' is to
allocate chunks of memory for the kernel to use. At the start of
each chunk of memory the size of the chunk is written, hence the
value 0xb7fdc00 is written onto memory at 0x4800000, therefore the
kernel panics when it goes back to access 'delayed_fput_list' later
on in the initialisation process.

On builds that were not crashing it was found that the compiler had
placed 'delayed_fput_list' at 0x4800008, meaning it wasn't corrupted
(but something else in memory was overwritten).

As can be seen in the first function call above the code begins to
allocate chunks of memory beginning from the symbol '__init_end'.
The MIPS linker script (vmlinux.lds.S) however defines the .bss
section to begin after '__init_end'. Therefore memory within the
.bss section is allocated to the kernel to use (System.map shows
'delayed_fput_list' and other kernel structures to be in .bss).

To stop the kernel panic (and the .bss section being corrupted)
memory should begin being allocated from the symbol '_end'.

Signed-off-by: Matt Bennett <matt.bennett@alliedtelesis.co.nz>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: aleksey.makarov@auriga.com
Patchwork: https://patchwork.linux-mips.org/patch/11251/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: mark prom_free_prom_memory() everywhere with __init

On OCTEON the function is non-trivial and we can potentially even save
some memory.

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9338/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Use correct CSR to soft reset

This fixes reboot for Octeon III boards

[ralf@linux-mips.org: Dropped segment for function cvmx_reset_octeon()
which was removed by the preceeding commit.]

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9464/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Add semaphore to serialize bootbus accesses.

Some hardware blocks attached to the OCTEON bootbus run asynchronously
to accesses from the CPUs. These include MMC/SD host, CF(when using
DMA), and NAND controller. A bus error, or corrupt data may occur if
a CPU is trying to access a bootbus connected device at the same time
the bus is running asynchronous operations.

To work around these problems we add this semaphore that must be
acquired before initiating bootbus activity. Subsequent patches will
add users for this.

Signed-off-by: David Daney <david.daney@cavium.com>
[aleksey.makarov@auriga.com: combine the patches]
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9459/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Use correct CSR to soft reset

Also delete unused cvmx_reset_octeon()
This fixes reboot for Octeon III boards

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/9471/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: More OCTEONIII support

Read clock rate from the correct CSR. Don't clear COP0_DCACHE for OCTEONIII.

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8945/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Core-15169 Workaround and general CVMSEG cleanup.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8943/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Update octeon-model.h code for new SoCs.

Add coverage for OCTEON III models.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8942/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Implement DCache errata workaround for all CN6XXX

Make messages refer to all CN6XXX.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8941/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Save/Restore wider multiply registers in OCTEON III CPUs

The wide multiplier is twice as wide, so we need to save twice as much
state. Detect the multiplier type (CPU type) at start up and install
model specific handlers.

[aleksey.makarov@auriga.com:
conflict resolution,
support for old compilers]

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Leonid Rosenboim <lrosenboim@caviumnetworks.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8933/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

treewide: fix typo in printk and Kconfig

This patch fix spelling typo in printk and Kconfig within
various part of kernel sources.

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

MIPS: Octeon: Remove special case for simulator command line.

There is no reason to have the kernel to append commands when running
under the simulator, the simulator is perfectly capable of supplying
the necessary command line arguments. Furthermore, if the simulator
needs something different than what is hard coded in the kernel, it
cannot get it if the kernel overrides it.

Fix/Simplify the whole thing by removing this bit.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8152/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: make get_system_type() thread-safe

get_system_type() is not thread-safe on OCTEON. It uses static data,
also more dangerous issue is that it's calling cvmx_fuse_read_byte()
every time without any synchronization. Currently it's possible to get
processes stuck looping forever in kernel simply by launching multiple
readers of /proc/cpuinfo:

(while true; do cat /proc/cpuinfo > /dev/null; done) &
(while true; do cat /proc/cpuinfo > /dev/null; done) &
...

Fix by initializing the system type string only once during the early
boot.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com>
Cc: stable@vger.kernel.org
Reviewed-by: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: http://patchwork.linux-mips.org/patch/7437/
Signed-off-by: James Hogan <james.hogan@imgtec.com>

MIPS: Add common plat_irq_dispatch declaration

Add common declaration to get rid of following sparse warning: "symbol
'plat_irq_dispatch' was not declared. Should it be static?"

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7539/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: make get_system_type() thread-safe

get_system_type() is not thread-safe on OCTEON. It uses static data,
also more dangerous issue is that it's calling cvmx_fuse_read_byte()
every time without any synchronization. Currently it's possible to get
processes stuck looping forever in kernel simply by launching multiple
readers of /proc/cpuinfo:

(while true; do cat /proc/cpuinfo > /dev/null; done) &
(while true; do cat /proc/cpuinfo > /dev/null; done) &
...

Fix by initializing the system type string only once during the early
boot.

Signed-off-by: Aaro Koskinen <aaro.koskinen@nsn.com>
Cc: stable@vger.kernel.org
Reviewed-by: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: http://patchwork.linux-mips.org/patch/7437/
Signed-off-by: James Hogan <james.hogan@imgtec.com>

MIPS: Add common plat_irq_dispatch declaration

Add common declaration to get rid of following sparse warning: "symbol
'plat_irq_dispatch' was not declared. Should it be static?"

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/7539/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove checks for CONFIG_CAVIUM_GDB

Three checks for CONFIG_CAVIUM_GDB were added in v2.6.29. But the
Kconfig symbol CAVIUM_GDB was never added to the tree. Remove these
checks.

Also remove the last reference to octeon_get_boot_debug_flag(). There is
no definition of that function anyway.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Tested-by: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>)
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6976/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Remove check for CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC

A check for CONFIG_CAVIUM_REPORT_SINGLE_BIT_ECC was added in v2.6.29,
but without the related Kconfig symbol. Remove this check.

Also remove the test for an "ecc_verbose" kernel parameter. It is
undocumented and has no effect anyway.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/6955/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

mips: octeon: convert to use unflatten_and_copy_device_tree

The octeon FDT code can be simplified by using
unflatten_and_copy_device_tree function. This removes all accesses to
FDT header data by the arch code.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Tested-by: Grant Likely <grant.likely@linaro.org>

MIPS: Panic messages should not end in \n.

Panic() is going to add a \n itself and it's annoying if a panic message rolls
of the screen on a device with no scrollback.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: cavium-octeon: fix I/O space setup on non-PCI systems

Fix I/O space setup, so that on non-PCI systems using inb()/outb()
won't crash the system. Some drivers may try to probe I/O space and for
that purpose we can just allocate some normal memory initially. Drivers
trying to reserve a region will fail early as we set the size to 0. If
a real I/O space is present, the PCI/PCIe support code will re-adjust
the values accordingly.

Tested with EdgeRouter Lite by enabling CONFIG_SERIO_I8042 that caused
the originally reported crash.

Reported-by: Faidon Liambotis <paravoid@debian.org>
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5626/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Don't clobber bootloader data structures.

Commit abe77f90dc (MIPS: Octeon: Add kexec and kdump support) added a
bootmem region for the kernel image itself. The problem is that this
is rounded up to a 0x100000 boundary, which is memory that may not be
owned by the kernel. Depending on the kernel's configuration based
size, this 'extra' memory may contain data passed from the bootloader
to the kernel itself, which if clobbered makes the kernel crash in
various ways.

The fix: Quit rounding the size up, so that we only use memory
assigned to the kernel.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: <stable@vger.kernel.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5449/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Oceton: Fix build error.

If CONFIG_CAVIUM_OCTEON_LOCK_L2_TLB, CONFIG_CAVIUM_OCTEON_LOCK_L2_EXCEPTION,
CONFIG_CAVIUM_OCTEON_LOCK_L2_LOW_LEVEL_INTERRUPT and
CONFIG_CAVIUM_OCTEON_LOCK_L2_INTERRUPT are all undefined:

arch/mips/cavium-octeon/setup.c: In function ‘prom_init’:
arch/mips/cavium-octeon/setup.c:715:12: error: unused variable ‘ebase’ [-Werror=unused-variable]

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove vestiges of CONFIG_CAVIUM_DECODE_RSL

This config option doesn't exist any more, remove the leftover code
for it too.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/5302/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: OCTEON: Improve _machine_halt implementation.

As noted by Wladislav Wiebe:
$ halt
..
Sent SIGKILL to all processes
Requesting system halt
[66.729373] System halted.
[66.733244]
[66.734761] =====================================
[66.739473] [ BUG: lock held at task exit time! ]
[66.744188] 3.8.7-0-sampleversion-fct #49 Tainted: G O
[66.750202] -------------------------------------
[66.754913] init/21479 is exiting with locks still held!
[66.760234] 1 lock held by init/21479:
[66.763990] #0: (reboot_mutex){+.+...}, at: [<ffffffff801776c8>] SyS_reboot+0xe0/0x218
[66.772165]
[66.772165] stack backtrace:
[66.776532] Call Trace:
[66.778992] [<ffffffff805780a8>] dump_stack+0x8/0x34
[66.783972] [<ffffffff801618b0>] do_exit+0x610/0xa70
[66.788948] [<ffffffff801777a8>] SyS_reboot+0x1c0/0x218
[66.794186] [<ffffffff8013d6a4>] handle_sys64+0x44/0x64

This is an alternative fix to the one sent by Wladislav. We kill the
watchdog for each CPU and then spin in WAIT with interrupts disabled.
This is the lowest power mode for the OCTEON. If we were to spin with
interrupts enabled, we would get a continual stream of warning messages
and backtraces from the lockup detector, so I chose to disable
interrupts.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: Maxim Uvarov <muvarov@gmail.com>
Cc: Wladislav Wiebe <wladislav.kw@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/5324/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Fix build error cavium-octeon without CONFIG_SMP

Singed-off-by: EunBong Song <eunb.song@samsung.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Whitespace cleanup.

Having received another series of whitespace patches I decided to do this
once and for all rather than dealing with this kind of patches trickling
in forever.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS/EDAC: Improve OCTEON EDAC support.

Some initialization errors are reported with the existing OCTEON EDAC
support patch. Also some parts have more than one memory controller.

Fix the errors and add multiple controllers if present.

Signed-off-by: David Daney <david.daney@cavium.com>

MIPS: Octeon: Add kexec and kdump support

[ralf@linux-mips.org: Original patch by Maxim Uvarov <muvarov@gmail.com>
with plenty of further shining, polishing, debugging and testing by me.]

Signed-off-by: Maxim Uvarov <muvarov@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: kexec@lists.infradead.org
Cc: horms@verge.net.au
Patchwork: https://patchwork.linux-mips.org/patch/1026/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Simplify code by assuming CONFIG_64BIT is always set.

No 32-bit kernels supported on Octeon.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove use of CONFIG_64BIT_PHYS_ADDR.

Only supporting 64-bit kernels there is no point in depending on
this symbol.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove highmem code.

On Cavium hardware only 64-bit kernels are supported so CONFIG_HIGHMEM
is never set.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Cavium: Add EDAC support.

Drivers for EDAC on Cavium. Supported subsystems are:

o CPU primary caches. These are parity protected only, so only error
reporting.
o Second level cache - ECC protected, provides SECDED.
o Memory: ECC / SECDEC if used with suitable DRAM modules. The driver will
will only initialize if ECC is enabled on a system so is safe to run on
non-ECC memory.
o PCI: Parity error reporting

Since it is very hard to test this sort of code the implementation is very
conservative and uses polling where possible for now.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Reviewed-by: Borislav Petkov <borislav.petkov@amd.com>

MIPS: Octeon: Add octeon_io_clk_delay() function.

Also cleanup and fix octeon_init_cvmcount()

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Acked-by: David S. Miller <davem@davemloft.net>

MIPS: Octeon: Initialize and fixup device tree.

If a compiled in device tree template is used, trim out unwanted parts
based on legacy platform probing.

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: devicetree-discuss@lists.ozlabs.org
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: linux-kernel@vger.kernel.org
Cc: David Daney <david.daney@cavium.com>
Patchwork: https://patchwork.linux-mips.org/patch/3935/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Fix several implicit uses of export.h/module.h

These will show up as a build failure once we clean up a
misuse of module.h in the mips termios header.

Uses export.h: (EXPORT_SYMBOL)
arch/mips/cavium-octeon/setup.c
arch/mips/pmc-sierra/yosemite/setup.c
arch/mips/rb532/devices.c
arch/mips/sni/setup.c

Uses module.h: (symbol_get/put)
arch/mips/alchemy/devboards/db1200.c

Uses module.h: (print_modules)
arch/mips/kernel/traps.c

Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/3448/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Disintegrate asm/system.h for MIPS

Disintegrate asm/system.h for MIPS.

Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
cc: linux-mips@linux-mips.org

MIPS: Handle initmem in systems with kernel not in add_memory_region() mem

This patch addresses a couple of related problems:

1) The kernel may reside in physical memory outside of the ranges set
by plat_mem_setup(). If this is the case, init mem cannot be
reused as it resides outside of the range of pages that the kernel
memory allocators control.

2) initrd images might be loaded in physical memory outside of the
ranges set by plat_mem_setup(). The memory likewise cannot be
reused. The patch doesn't handle this specific case, but the
infrastructure is useful for future patches that do.

The crux of the problem is that there are memory regions that need be
memory_present(), but that cannot be free_bootmem() at the time of
arch_mem_init(). We create a new type of memory (BOOT_MEM_INIT_RAM)
for use with add_memory_region(). Then arch_mem_init() adds the init
mem with this type if the init mem is not already covered by existing
ranges.

When memory is being freed into the bootmem allocator, we skip the
BOOT_MEM_INIT_RAM ranges so they are not clobbered, but we do signal
them as memory_present(). This way when they are later freed, the
necessary memory manager structures have initialized and the Sparse
allocater is prevented from crashing.

The Octeon specific code that handled this case is removed, because
the new general purpose code handles the case.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1988/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Fix up inconsistency in panic() string argument.

Panic() invokes printk() to add a \n internally, so panic arguments should
not themselves end in \n. Panic invocations in arch/mips and elsewhere
are inconsistently sometimes terminating in \n, sometimes not.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Octeon: Fix interrupt irq settings for performance counters.

Octeon uses different interrupt irq for timer and performance counters.
Set CvmCtl[IPPCI] to correct irq value very early.

Signed-off-by: Chandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: Chandrakala Chavva <cchavva@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/2085/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>

MIPS: Octeon: Rewrite interrupt handling code.

This includes conversion to new style irq_chip functions, and
correctly enabling/disabling per-CPU interrupts.

The hardware interrupt bit to irq number mapping is now done with a
flexible map, instead of by bit twiddling the irq number.

[ tglx: Adjusted to new irq_cpu_on/offline callbacks and
__irq_set_affinity_lock ]

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: ralf@linux-mips.org
LKML-Reference: <1301081931-11240-5-git-send-email-ddaney@caviumnetworks.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

MIPS: Octeon: Apply CN63XXP1 errata workarounds.

The CN63XXP1 needs a couple of workarounds to ensure memory is not written
in unexpected ways.

All PREF with hints in the range 0-4,6-24 are replaced with PREF 28. We
pass a flag to the assembler to cover compiler generated code, and patch
uasm for the dynamically generated code.

The write buffer threshold is reduced to 4.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/1672/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Add octeon_get_io_clock_rate() for cn63xx

Starting with cn63xx Octeon I/O blocks are clocked at a different rate
than the CPU. Add a new function octeon_get_io_clock_rate() that
yields the I/O clock rate.

Also rearrange octeon_get_clock_rate() to get the value from the saved
sysinfo structure.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/1671/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove bogus code from octeon_get_clock_rate()

We can run with any simulator clock rate. Get rid of the code
overriding it to 6MHz.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Patchwork: http://patchwork.linux-mips.org/patch/1669/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Allow more than 3.75GB of memory with PCIe

We reserve the 3.75GB - 4GB region of PCIe address space for device to
device transfers, making the corresponding physical memory under
direct mapping unavailable for DMA.

To allow for PCIe DMA to all physical memory we map this chunk of
physical memory with BAR1. Because of the resulting discontinuity in
the mapping function, we remove a page of memory at each end of the
range so multi-page DMA buffers can never be allocated that span the
range.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1535/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Export prom_putchar().

The forthcoming watchdog driver will use it.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
To: wim@iguana.be
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/1499/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Implement delays with cycle counter.

Power throttling make deterministic delay loops impossible.
Re-implement delays using the cycle counter. This also allows us to
get rid of the code that calculates loops per jiffy.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1317/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Cavium: Remove dead CONFIG_GDB_CONSOLE

CONFIG_GDB_CONSOLE doesn't exist in Kconfig, therefore removing all
references for it from the source code.

Signed-off-by: Christoph Egger <siccegge@cs.fau.de>
To: David Daney <ddaney@caviumnetworks.com>
To: Yang Shi <yang.shi@windriver.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
To: Tejun Heo <tj@kernel.org>
To: linux-mips@linux-mips.org
To: linux-kernel@vger.kernel.org
Cc: vamos@i4.informatik.uni-erlangen.de
Patchwork: https://patchwork.linux-mips.org/patch/1368/
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Serial port fixes for OCTEON simulator.

For the simulator, fake a slow clock to get fast output.

In prom_putchar we have to mask the value so the simulator doesn't
ASSERT when printing non-ASCII characters.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1255/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Get rid of early serial.

Get rid of early_serial_setup, we use CONFIG_EARLY_PRINTK instead.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1254/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove redundant declaration of octeon_reserve32_memory

octeon_reserve32_memory is defined In Octeon's setup.c, so remove the
redundant extern declaration of this variable.

Signed-off-by: Yang Shi <yang.shi@windriver.com>
To: f.fainelli@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1022/
Acked-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove #if 0 code.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1029/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove vestiges of CONFIG_CAVIUM_RESERVE32_USE_WIRED_TLB

The config option CAVIUM_RESERVE32_USE_WIRED_TLB is not supported.
Remove the dead code controlled by it.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/1028/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Move some platform device registration to its own file.

There is a bunch of platform device registration in
arch/mips/cavium-octeon/setup.c. We move it to its own file in
preparation for adding more platform devices.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Add hardware RNG platform device.

Add a platform device for the Octeon Random Number Generator (RNG).

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Build fix - include <linux/smp.h> into all smp_processor_id() users.

Some of the were relying into smp.h being dragged in by another header
which of course is fragile. <asm/cpu-info.h> uses smp_processor_id()
only in macros and including smp.h there leads to an include loop, so
don't change cpu-info.h.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Octeon: Remove duplicated #includes

Signed-off-by: Huang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

MIPS: Add Cavium OCTEON processor support files to arch/mips/cavium-octeon.

These are the rest of the new files needed to add OCTEON processor
support to the Linux kernel. Other than Makefile and Kconfig which
should be obvious, we have:

csrc-octeon.c -- Clock source driver for OCTEON.
dma-octeon.c -- Helper functions for mapping DMA memory.
flash_setup.c -- Register on-board flash with the MTD subsystem.
octeon-irq.c -- OCTEON interrupt controller managment.
octeon-memcpy.S -- Optimized memcpy() implementation.
serial.c -- Register 8250 platform driver and early console.
setup.c -- Early architecture initialization.
smp.c -- OCTEON SMP support.
octeon_switch.S -- Scheduler context switch for OCTEON.
c-octeon.c -- OCTEON cache controller support.
cex-oct.S -- OCTEON cache exception handler.

asm/mach-cavium-octeon/*.h -- Architecture include files.

Signed-off-by: Tomaso Paoletti <tpaoletti@caviumnetworks.com>
Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

create mode 100644 arch/mips/cavium-octeon/Kconfig
create mode 100644 arch/mips/cavium-octeon/Makefile
create mode 100644 arch/mips/cavium-octeon/csrc-octeon.c
create mode 100644 arch/mips/cavium-octeon/dma-octeon.c
create mode 100644 arch/mips/cavium-octeon/flash_setup.c
create mode 100644 arch/mips/cavium-octeon/octeon-irq.c
create mode 100644 arch/mips/cavium-octeon/octeon-memcpy.S
create mode 100644 arch/mips/cavium-octeon/serial.c
create mode 100644 arch/mips/cavium-octeon/setup.c
create mode 100644 arch/mips/cavium-octeon/smp.c
create mode 100644 arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
create mode 100644 arch/mips/include/asm/mach-cavium-octeon/dma-coherence.h
create mode 100644 arch/mips/include/asm/mach-cavium-octeon/irq.h
create mode 100644 arch/mips/include/asm/mach-cavium-octeon/kernel-entry-init.h
create mode 100644 arch/mips/include/asm/mach-cavium-octeon/war.h
create mode 100644 arch/mips/include/asm/octeon/octeon.h
create mode 100644 arch/mips/kernel/octeon_switch.S
create mode 100644 arch/mips/mm/c-octeon.c
create mode 100644 arch/mips/mm/cex-oct.S