Merge branch 'for-next/misc'

mips: reloc: remove outdated comment ...

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Regenerate defconfig files ...

Update defconfig files with the following script.

for a in arch/*; do
	arch=$(basename $a)
	for c in $a/configs/*; do
		config=$(basename $c)

	export ARCH=$arch
	make $config && make savedefconfig && mv defconfig $c
	done
done

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: dts: tplink-mr3020: add missing stdout-path property ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: Kconfig: move ARCH_TEXT_BASE to top mips Kconfig file ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: relocate_code: fix barebox image memcpy() size ...

In this relocate_code() piece 'length' is greater than 'barebox_image_size':

    #define MAX_BSS_SIZE SZ_1M
    ...
    length = barebox_image_size + MAX_BSS_SIZE;
    relocaddr = ALIGN_DOWN(ram_size - barebox_image_size, SZ_64K);
    ...
    memcpy((void *)relocaddr, __image_start, length);

so 'ram_size' overflow occurs during memcpy().

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Tested-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: lib/Makefile: fix whitespaces ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: fix 'assignment makes integer from pointer without a cast' warning ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: use anonymous labels in ENTRY_FUNCTION_END and STOP_WITH_DEBUG_EVENT macros ...

Use of global labels of the same name inside ENTRY_FUNCTION_END and
STOP_WITH_DEBUG_EVENT prevents simultaneous use of both macros. It also
prevents multiple use of one of them.

Signed-off-by: Peter Mamonov <pmamonov@gmail.com>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

treewide: replace '---help---' with 'help' in Kconfig files ...

In Linux, '---help---' was deprecated in favor of 'help', and
this is checked by the recent checkpatch.pl

See Linux commit 84af7a6

The number of '---help---' is gradually decreasing in Linux, but there
are still lots. However, '---help---' will be completely killed when
the time comes.

Fortunately, there are only some in Barebox. Replacing them is not hard.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

arch: add KBUILD_DEFCONFIG to allow "make defconfig" ...

Currently, "make defconfig" is only supported for sandbox and x86.

I set KBUILD_DEFCONFIG to support "make defconfig" where I was able
to find a suitable one.

nios2 and openrisc have a single generic_defconfig, so it is definitely
good for KBUILD_DEFCONFIG.

For arm, mips, I assume qemu is a preferred choice over a real board.

blackfin has only one defconfig. Since it is inactive (it is gone in
Linux), so no more defconfig will come in.

I am not sure about ppc and riscv, so I did not touch them.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: remove request_sdram_region "fdt" ...

It is actually not needed at barebox runtime

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: relocation: do not use configurable memory layout ...

The relocator is not able to patch properly new location of
the stack. To make it work properly it is better to disable
HAVE_CONFIGURABLE_MEMORY_LAYOUT.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: relocation: add relocation support ...

this patch i a port of following patch from u-boot with some additional
integration changes and fixes of original code:
| Subject: [PATCH] MIPS: Stop building position independent code
|
| U-Boot has up until now built with -fpic for the MIPS architecture,
| producing position independent code which uses indirection through a
| global offset table, making relocation fairly straightforward as it
| simply involves patching up GOT entries.
|
| Using -fpic does however have some downsides. The biggest of these is
| that generated code is bloated in various ways. For example, function
| calls are indirected through the GOT & the t9 register:
|
|   8f998064   lw     t9,-32668(gp)
|   0320f809   jalr   t9
|
| Without -fpic the call is simply:
|
|   0f803f01   jal    be00fc04 <puts>
|
| This is more compact & faster (due to the lack of the load & the
| dependency the jump has on its result). It is also easier to read &
| debug because the disassembly shows what function is being called,
| rather than just an offset from gp which would then have to be looked up
| in the ELF to discover the target function.
|
| Another disadvantage of -fpic is that each function begins with a
| sequence to calculate the value of the gp register, for example:
|
|   3c1c0004   lui    gp,0x4
|   279c3384   addiu  gp,gp,13188
|   0399e021   addu   gp,gp,t9
|
| Without using -fpic this sequence no longer appears at the start of each
| function, reducing code size considerably.
|
| This patch switches U-Boot from building with -fpic to building with
| -fno-pic, in order to gain the benefits described above. The cost of
| this is an extra step during the build process to extract relocation
| data from the ELF & write it into a new .rel section in a compact
| format, plus the added complexity of dealing with multiple types of
| relocation rather than the single type that applied to the GOT. The
| benefit is smaller, cleaner, more debuggable code. The relocate_code()
| function is reimplemented in C to handle the new relocation scheme,
| which also makes it easier to read & debug.
|
| Taking maltael_defconfig as an example the size of u-boot.bin built
| using the Codescape MIPS 2016.05-06 toolchain (gcc 4.9.2, binutils
| 2.24.90) shrinks from 254KiB to 224KiB.
|
| Signed-off-by: Paul Burton <paul.burton@imgtec.com>

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: relocation: pass ram size to pbl_main_entry ...

To make barebox dynamically relocatable it should know
the RAM size to be able to calculate proper new location.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/misc'

Merge branch 'for-next/lseek'

treewide: surround Kconfig file paths with double quotes ...

Based on Linux commit 8636a1f

This will be needed when you sync Kconfig with Linux 5.0 or later.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

pbl multiimage: Allow to check image sizes ...

PBL images are often constrained in size by limitations exposed by
the SoCs SRAM size or partition sizes on the boot device. So far
we tried to configure these limits in Kconfig, but with PBL multi
images and thus different limitations for the different supported
images this no longer works. This patch has another approach for
it:

During build time make variables containing the relevant sizes for
each image are created. These are:

PBL_CODE_SIZE_$(symbol)
PBL_MEMORY_SIZE_$(symbol)
PBL_IMAGE_SIZE_$(symbol)

PBL_CODE_SIZE_$(symbol) contains the pure code size of the PBL, it
should be smaller than the available SRAM during boot. Normally the
PBL's bss segment also needs to be in the initial SRAM, for this
case PBL_MEMORY_SIZE_$(symbol) is the relevant variable.
PBL_IMAGE_SIZE_$(symbol) contains the full size of the PBL image
including the compressed payload (but without any image headers
created later by SoC specific image tools).

$(symbol) is a placeholder for the start symbol used for this PBL image,
thus for the i.MX53 QSB with entry start_imx53_loco

PBL_CODE_SIZE_start_imx53_loco

will be created. The images/Makefile.* can use these variables directly
to check sizes or specify the same variables with a "MAX_" prefix. So
when images/Makefile.imx specifies

MAX_PBL_CODE_SIZE_start_imx53_loco = 0x10000

then the build system will make sure that the PBL code for the QSB will
not get bigger than 64KiB.

Also included in this patch are the size restrictions for the i.MX8MQ
images as an example how to use this.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: ath79: Use errno to get error code from open_and_lseek() ...

Open_and_lseek() return actual error code via errno, so change the
code to use it instead of return value.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: ath79: increase malloc size to 8 MiB ...

with 4 MiB we are not able even to start latest kernel.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Merge branch 'for-next/pci'

Merge branch 'for-next/misc'

MIPS: ath79: add spi and sram bootstrap helpers ...

At least some ath79 SoC have build in 32K RAM. It allow us to use
lowlevel portion of barebox to bootstrap the system by using JTAG
debugger (For example OpenOCD).
Since ath79 has no reliable way to stop the CPU execution before
reading SPI Flash, this can cause different issues. To avoid it, we
need to flash a execution trap with software debug breakpoint to the
flash.

The workflow should be as follow:
- After power on or reset the CPU will start execution of SPI flash.
  As soon as software debug breakpoint is executed, CPU will halt and
  notify OpenOCD about breakpoint event.
- OpenOCD will load reduced barebox to SRAM and execute it.
  This part will do all needed low level initialization - PLL, RAM and
  trigger second breakpoint event.
- OpenOCD will load full barebox version to the main RAM and start
  execution.

It can be used for bring-up, so no regular flashing is needed.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: black-swift: use ar9331_pbl_generic_start ...

most ar9331 boards are almost identical. Remove as much duplicate code
as possible.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: tplink-mr3020: use ar9331_pbl_generic_start ...

most ar9331 boards are almost identical. Remove as much duplicate code
as possible.

Signed-off-by: Oleksij Rempel <linux@rempel-privat.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: drop *_MULTI_BOARDS atavisms ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: malta: Typo fix ...

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

move umode_t typedef from asm/types.h to linux/types.h ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

MIPS: asm/types.h: drop unused stuff ...

Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>