treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 1)

Based on the normalized pattern:

this program is free software you can redistribute it and/or modify it
under the terms of the gnu general public license as published by the
free software foundation version 2 this program is distributed as is
without any warranty of any kind whether express or implied without
even the implied warranty of merchantability or fitness for a
particular purpose see the gnu general public license for more details

extracted by the scancode license scanner the SPDX license identifier

GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

ARM: bcm: use inline assembly for "smc" request

Move the code that implements the "smc" call into a C function that
uses inline assembly. This allows us to make that function private,
and enables us to get rid of "arch/arm/mach-bcm/bcm_kona_smc_asm.S".
Rename what had been the "buffer_addr" argument to be "buffer_phys"
so it's consistent with other usage in this file.

Since it's now easy to do, verify that r12 contains SEC_EXIT_NORMAL
upon completion of the SMC. There really isn't a good way to handle
the abnormal completion of a secure monitor request.

Since "bcm_kona_smc.h" is now only included from C files, eliminate
the #ifndef __ASSEMBLY__.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>

ARM: bcm: clean up SMC code

This patch just does some simple cleanup in "bcm_kona_smc.c":
- Get rid of the secure_bridge_data structure. Instead, just
define two globals that record the physical and virtual
addresses of the SMC arguments buffer. Use "buffer" instead
of "bounce" in their names. Drop of the erroneous __iomem
annotation for the physical address.
- Get rid of the initialized flag and just use a non-null buffer
address to indicate that.
- Get the size of the memory region when fetching the SMC
arguments buffer location from the device tree. Use it to
call ioremap() directly rather than requiring of_iomap() to
go look it up again.
- Do some additional validation on that memory region size.
- Flush caches unconditionally in __bcm_kona_smc(); nothing
supplies SSAPI_BRCM_START_VC_CORE as a service id.
- Drop a needless initialization of "rc" in __bcm_kona_smc().

It also deletes most of the content of "bcm_kona_smc.h" because it's
never actually used and is of questionable value anyway.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Tim Kryger <tim.kryger@linaro.org>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>
Reviewed-by: Matt Porter <mporter@linaro.org>
Signed-off-by: Matt Porter <mporter@linaro.org>

ARM: bcm: Make secure API call optional

The current bcm_kona_smc_init function throws a BUG_ON if there's no SMC
device node defined in the device tree.

Since secure API access is optional depending the chip configuration,
fix this by allowing the rest of the code to run even if there's no SMC
device node defined

Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Markus Mayer <markus.mayer@linaro.org>

ARM: bcm281xx: Add L2 cache enable code

- Adds a module to provide calls into secure monitor mode
- Uses this module to make secure monitor calls to enable L2 cache.

Updates from V1:
- Split DT portion into separate patch
- replace #ifdef-ed L2 code with "if".
- move init call to board init

Signed-off-by: Christian Daudt <csd@broadcom.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>