linux-stable.git/arch/mips/bmips/setup.c, branch linux-4.9.y

MIPS: Use address-of operator on section symbols

2022-05-15T17:39:17+00:00

commit d422c6c0644bccbb1ebeefffa51f35cec3019517 upstream.

When building xway_defconfig with clang:

arch/mips/lantiq/prom.c:82:23: error: array comparison always evaluates
to true [-Werror,-Wtautological-compare]
        else if (__dtb_start != __dtb_end)
                             ^
1 error generated.

These are not true arrays, they are linker defined symbols, which are
just addresses. Using the address of operator silences the warning
and does not change the resulting assembly with either clang/ld.lld
or gcc/ld (tested with diff + objdump -Dr). Do the same thing across
the entire MIPS subsystem to ensure there are no more warnings around
this type of comparison.

Link: https://github.com/ClangBuiltLinux/linux/issues/1232
Signed-off-by: Nathan Chancellor 
Acked-by: Florian Fainelli 
Signed-off-by: Thomas Bogendoerfer 
Cc: Sudip Mukherjee 
Signed-off-by: Greg Kroah-Hartman

MIPS: BMIPS: Support APPENDED_DTB

2016-10-06T15:31:02+00:00

Use appended DTB when available.

Signed-off-by: Jaedon Shin 
Cc: Kevin Cernekee 
Cc: Florian Fainelli 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14337/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: Add BCM6362 support

2016-10-04T14:13:57+00:00

BCM6362 is a BMIPS4350 SoC which needs the same fixup as BCM6368 in order to
enable SMP support.

Signed-off-by: Álvaro Fernández Rojas 
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13845/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: Add BCM3368 support

2016-10-04T14:13:57+00:00

BCM3368 has a shared TLB which conflicts with current SMP support, so it must
be disabled for now.

Signed-off-by: Álvaro Fernández Rojas 
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: john@phrozen.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13840/
Signed-off-by: Ralf Baechle

MIPS: store the appended dtb address in a variable

2016-08-02T12:00:16+00:00

Instead of rewriting the arguments to match the UHI spec, store the
address of a appended or UHI supplied dtb in fw_supplied_dtb.

That way the original bootloader arugments are kept intact while still
making the use of an appended dtb invisible for mach code.

Mach code can still find out if it is an appended dtb by comparing
fw_arg1 with fw_supplied_dtb.

Signed-off-by: Jonas Gorski 
Cc: Kevin Cernekee 
Cc: Florian Fainelli 
Cc: John Crispin 
Cc: Paul Burton 
Cc: James Hogan 
Cc: Alban Bedel 
Cc: Daniel Gimpelevich 
Cc: Antony Pavlov 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13699/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: Add support for BCM63268

2016-05-13T12:02:09+00:00

This SoC is very similar to BCM63168 and Broadcom usually refers to them as
BCM63268.
Add BCM63268 and missing BCM63168 to device tree documentation.

Signed-off-by: Álvaro Fernández Rojas 
Acked-by: Rob Herring 
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13042/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: Add BCM6358 support

2016-05-13T12:02:09+00:00

BCM6358 has a shared TLB which conflicts with current SMP support, so it must
be disabled for now.
BCM6358 uses >= 0xfffe0000 addresses for internal registers, which need to be
remapped (by using a simplified version of BRCM63xx ioremap.h).
However, 0xfff80000 is a better address, since it also covers BCM3368, leaving
the possibility to add it in the future.

Signed-off-by: Álvaro Fernández Rojas 
Cc: f.fainelli@gmail.com
Cc: jogo@openwrt.org
Cc: cernekee@gmail.com
Cc: robh@kernel.org
Cc: simon@fire.lp0.eu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/13040/
Signed-off-by: Ralf Baechle

MIPS: BMIPS: Add early CPU initialization code

2016-05-13T12:01:55+00:00

Port the stblinux-3.3 code to perform a bunch of CPU-specific initialization,
make it compatible with run-time detection of the CPU, and unroll the
brcmstb-specific macros: BDEV_RB(), BDEV_UNSET.

The "pref 30" disabling is done as a quirk. This is a preliminary change to
allow the use of the "rotr" instruction gated by cpu_has_rixi.

Signed-off-by: Florian Fainelli 
Cc: john@phrozen.org
Cc: cernekee@gmail.com
Cc: jon.fraser@broadcom.com
Cc: pgynther@google.com
Cc: paul.burton@imgtec.com
Cc: ddaney.cavm@gmail.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12504/
Signed-off-by: Ralf Baechle

MIPS: bmips: Support SMP on BCM63168

2016-01-04T08:42:26+00:00

The BCM63168 requires the same CPU1 fix as BCM6368.

Signed-off-by: Simon Arlott 
Cc: Kevin Cernekee 
Cc: Florian Fainelli 
Cc: linux-mips@linux-mips.org
Cc: Linux Kernel Mailing List 
Patchwork: https://patchwork.linux-mips.org/patch/11487/
Signed-off-by: Ralf Baechle

MIPS: Make MIPS_CMDLINE_DTB default

2015-11-11T07:38:37+00:00

Seval of-enabled machines (bmips, lantiq, xlp, pistachio, ralink) copied
the arguments from dtb to arcs_command_line to prevent the kernel from
overwriting them.

Since there is now an option to keep the dtb arguments, default to the
new option remove the "backup" to arcs_command_line in case of USE_OF is
enabled, except for those platforms that still take the bootloader
arguments or do not use any at all.

Signed-off-by: Jonas Gorski 
Cc: linux-mips@linux-mips.org
Cc: Kevin Cernekee 
Cc: Florian Fainelli 
Cc: Zubair Lutfullah Kakakhel 
Cc: James Hogan 
Cc: John Crispin 
Cc: Ganesan Ramalingam 
Cc: Jayachandran C 
Cc: Andrew Bresticker 
Cc: James Hartley 
Patchwork: https://patchwork.linux-mips.org/patch/11285/
Signed-off-by: Ralf Baechle