Commit graph

312 commits

Author SHA1 Message Date
Purna Chandra Mandal
c76eb72c43 board: add SDHCI support for PIC32MZDASK board.
Enable MMC, SDHCI, FAT_FS support for PIC32MZ[DA] StarterKit.
Also add custom scripts, rules to boot Linux from microSD card.

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
2016-02-01 22:14:02 +01:00
Purna Chandra Mandal
44da3a176c board: Add Microchip PIC32MZ[DA]-Starter-Kit board.
This adds support for Microchip PIC32MZ[DA] StarterKit board
based on a PIC32MZ[DA] family of microcontroller.

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-02-01 22:14:01 +01:00
Purna Chandra Mandal
be961fa15b MIPS: Add support for Microchip PIC32MZ[DA] SoC family.
Add Microchip PIC32MZ[DA] SoC family support.

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-02-01 22:14:01 +01:00
Purna Chandra Mandal
9ffa7a35ef drivers: ddr: Add DDR2 SDRAM controller driver for Microchip PIC32.
This driver initializes PIC32 DDR2 SDRAM controller and internal DDR2 Phy module.
DDR2 controller operates in half-rate mode (upto 533MHZ frequency).

Signed-off-by: Paul Thacker <paul.thacker@microchip.com>
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-02-01 22:14:01 +01:00
Purna Chandra Mandal
32c1a6eef8 MIPS: initial infrastructure for Microchip PIC32 architecture
Create initial directory, Kconfigs needed for PIC32 architecture
support. Also add PIC32 specific register definition required for drivers.

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-02-01 22:14:00 +01:00
Paul Burton
05e342554e MIPS: Support dynamic I/O port base address
The existing mips_io_port_base variable isn't suitable for use early
during boot since it will be stored in the .data section which may not
be writable pre-relocation. Fix this by moving the I/O port base address
into struct arch_global_data. In order to avoid adding this field for
all targets, make this dependant upon a new Kconfig entry
CONFIG_DYNAMIC_IO_PORT_BASE. Malta is the only board which sets a
non-zero I/O port base, so select this option only for Malta.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2016-02-01 22:13:25 +01:00
Paul Burton
8ac493cd65 MIPS: Remove SLOW_DOWN_IO
CONF_SLOWDOWN_IO is never set for any target, so remove the dead code in
the SLOW_DOWN_IO macro. This is done in preparation for changes to
mips_io_port_base which can be avoided in this path by removing it
entirely.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2016-02-01 22:13:25 +01:00
Marek Vasut
fbb0de088b mips: cache: Bulletproof the code against cornercases
This patch makes sure that the flush/invalidate_dcache_range() functions
can handle corner-case calls like this -- invalidate_dcache_range(0, 0, 0);
This call is valid and is happily produced by USB EHCI code for example.
The expected behavior of the cache function(s) in this case is that they
will do no operation, since the size is zero.

The current implementation though has a problem where such invocation will
result in a hard CPU hang. This is because under such conditions, where the
start_addr = 0 and stop = 0, the addr = 0 and aend = 0xffffffe0 . The loop
will then try to iterate over the entire address space, which in itself is
wrong. But iterating over the entire address space might also hit some odd
address which will cause bus hang. The later happens on the Atheros MIPS.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Hans de Goede <hdegoede@redhat.com>
2016-02-01 22:13:24 +01:00
Daniel Schwierzeck
e26e8dc8f4 MIPS: start.S: fix and optimize instructions
Fix 32 vs 64 bit load/store instructions. Access CP0_WATCHHI as
32 Bit register. Use 64 Bit register access for clearing gd_data
and copying U-Boot.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-02-01 22:13:24 +01:00
Purna Chandra Mandal
a62790997f MIPS: initialize board_init_f() argument to zero.
Argument boot_flags of board_init_f() should be set to 0 as
$a0 may be utilized in lowlevel_init() or mips_cache_reset()
or previous stage boot-loader.

Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-02-01 22:13:24 +01:00
Tom Rini
d6ea6d8876 mips: asm/io.h: Add in <linux/bug.h>
As part of the bug.h / BUILD_BUG_* clean up, this file was missed.

Signed-off-by: Tom Rini <trini@konsulko.com>
2016-01-25 18:52:23 -05:00
Daniel Schwierzeck
0e0efb40b8 MIPS: implement bit manipulating I/O accessors
Add support for functions clrbits_X(), setbits_X() and clrsetbits_X()
on MIPS.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
898582bdee MIPS: fix SPDX license identifier in remaining arch header files
Add a SPDX license identifier to MIPS header files where it is
still missing.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
a3ab2ae7f6 MIPS: sync processor and register definitions with linux-4.4
Update definitions for processor, registers as well as assemby
macros.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
23ff8633fd MIPS: sync I/O related header files with linux-4.4
Mainly sync asm/io.h to get a working ioremap() implementation
as well as the full set of I/O accessors. Pull in additional
header files to make this work.

Furthermore port over the directory 'arch/mips/include/asm/mach-generic/'
with contains default definitions for I/O and memory spaces and default
implementations for mapping those spaces. All files in that directory
can be overwritten by a SoC/machine.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
f53830e74e MIPS: kconfig: add option for MIPS_L1_CACHE_SHIFT
Add Kconfig symbol for L1 cache shift like the kernel does.
The value of CONFIG_SYS_CACHELINE_SIZE is not a reliable source
for ARCH_DMA_MINALIGN anymore, because it is optional on MIPS.
If CONFIG_SYS_CACHELINE_SIZE is not defined by a board, the
cache sizes are automatically detected and ARCH_DMA_MINALIGN
would be set to 128 Bytes.

The default value for CONFIG_MIPS_L1_CACHE_SHIFT is 5 which
corresponds to 32 Bytes. All current MIPS boards already used
that value. While on it, fix the Malta board to use a value of 6
like the kernel port does.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
0315a28909 MIPS: Kconfig: optimize gcc -march and -mtune setup
Move setup of -march to arch/mips/Makefile and follow the design on ARM.
Also add a possibility to chose specific CPU tune options.

Signed-off-by: Wills Wang <wills.wang@live.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
76ada5f8b7 MIPS: au1x00: move SoC header files to arch/mips/mach-au1x00/include/mach/
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
6479b691d7 MIPS: Kconfig: refactor machine setup
Refactor machine setup like it is done on ARM. While on it,
also support "include <mach/file.h" for machine specific
header files.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:46 +01:00
Daniel Schwierzeck
0fc13a9093 MIPS: add initial infrastructure for device-tree files
Prepare sub-folder for device-tree files. Make support for
device-tree on MIPS available in Kbuild/Kconfig.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
2016-01-16 21:06:45 +01:00
Daniel Schwierzeck
e92d9124f8 MIPS: do not build position-independent executables for SPL
SPL binaries are usually linked to a fixed address in SRAM.
Furthermore SPL binaries do not need to relocate itself. Thus
do not build them as position-independent binaries which helps
to largely reduce the size of SPL binaries.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:45 +01:00
Daniel Schwierzeck
5b6f357fe7 MIPS: create .text sub-sections for assembler functions
Put all functions coded in assembly in sub-sections of
section .text. This allows the linker to garbage collect
unused assembly functions too.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:45 +01:00
Daniel Schwierzeck
113492988b MIPS: fix annotation of _start and relocate_code
Correctly annotate _start and relocate_code as functions to
produce more readable disassembly code generated by objdump.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2016-01-16 21:06:45 +01:00
Purna Chandra Mandal
1a96780016 MIPS: add asm/gpio.h to fix compilation error with CONFIG_CMD_GPIO.
With CONFIG_CMD_GPIO compilation reports error.
common/cmd_gpio.c:13:22: fatal error: asm/gpio.h: No such file or directory
 #include <asm/gpio.h>
                      ^
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Reviewed-by: Chin Liang See <clsee@altera.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-01-16 21:06:45 +01:00
Ben Whitten
192bc6948b Fix GCC format-security errors and convert sprintfs.
With format-security errors turned on, GCC picks up the use of sprintf with
a format parameter not being a string literal.

Simple uses of sprintf are also converted to use strcpy.

Signed-off-by: Ben Whitten <ben.whitten@gmail.com>
Acked-by: Wolfgang Denk <wd@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
2016-01-14 22:11:34 -05:00
Tom Rini
250ea267d8 Merge branch 'master' of git://git.denx.de/u-boot-mips 2015-11-06 09:17:17 -05:00
Daniel Schwierzeck
347ea94e2a MIPS: bootm: use CONFIG_IS_ENABLED() everywhere
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
2015-11-06 13:27:28 +01:00
Daniel Schwierzeck
2bb5b63879 MIPS: bootm: rework and fix broken bootm code
The move to 'generic board' as well as changes in the generic
bootm code broke the boot of FIT uImage's. Especially uImage's
with additional initramfs images or FDT's do not work anymore.

Refactor the bootm code to work again with the generic bootm code.

Always relocate ramdisk and FDT in step 'bootm prep' because the
generic bootm code does this only for legacy uImage's.

Move the step 'bootm cmdline' to 'bootm prep' because the Linux
kernel parameters rd_start and rd_size have to be initialized after
the relocation of the ramdisk.

Furthermore support the step 'bootm fake'.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-11-06 13:27:28 +01:00
Fabio Estevam
b810aa1dd1 mips: Use the generic bitops headers
The generic bitops headers are required when calling logarithmic
functions, such as ilog2().

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-11-05 10:52:26 -05:00
Govindraj Raja
4adcb2380c MIPS: fix syntax for fdt_chosen/initrd.
The syntax for the fdt_chosen/initrd
functions seem to deprecated in usage
from MIPS bootm implementation.

Third parameter is no more used in these api's
Refer to : include/fdt_support.h

Signed-off-by: Govindraj Raja <govindraj.raja@imgtec.com>
2015-08-21 15:22:41 +02:00
Chris Packham
73a4152b25 mips: Use unsigned int when reading c0 registers
In commit a18a477 (MIPS: use common code from lib/time.c) MIPS platforms
started using common the common timer functions which are based around
the fact that many platforms have a 32-bit free running counter register
that can be used see commit 8dfafdd (Introduce common timer functions).

Even MIPS64 has such a 32-bit register (some have an additional 64-bit free
running counter, but that's something for another time).

The problem is that in __read_32bit_c0_register() we read the value from
this register into an _signed_ int and as it's returned up the call
chain to timer_read_counter() it gets assigned to an unsigned long. On a
32-bit system there is no problem. On a 64-bit system odd things happen,
sign extension seems to kick in and all of a sudden if the counter
register happens to have the MSb (i.e. the sign bit) set the negative
int gets sign extended into a very large unsigned long value. This in
turn throws out things from get_ticks() up.

Update __read_32bit_c0_register() and __read_32bit_c0_ctrl_register() to
use "unsigned int res;" instead of "int res;". There seems to be little
reason to treat these register values as signed. They are either
counters (which by definition are unsigned) or are made up of various
bit fields to be interpreted as per the CPU datasheet.

Reported-by: Sachin Surendran <sachin.surendran@alliedtelesis.co.nz>
Signed-off-by: Chris Packham <judge.packham@gmail.com>
2015-08-21 15:22:41 +02:00
Daniel Schwierzeck
b11c5d1dc2 MIPS: change 'extern inline' to 'static inline'
The kernel changed it a long time ago. Also this is now broken
on gcc-5.x.

Reported-by: Andy Kennedy <andy.kennedy@adtran.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-07-02 11:29:33 +02:00
Tony Wu
49bbdae318 MIPS: fix missing semicolon in cacheops.h
Fix missing semicolon in cacheops.h introduced in commit
2b8bcc5a2 (MIPS: avoid .set ISA for cache operations)

Signed-off-by: Tony Wu <tung7970@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
2015-07-02 11:29:33 +02:00
Joe Hershberger
c9bb942e2f Move default y configs out of arch/board Kconfig
Some archs/boards specify their own default by pre-defining the config
which causes the Kconfig system to mix up the order of the configs in
the defconfigs... This will cause merge pain if allowed to proliferate.

Remove the configs that behave this way from the archs.

A few configs still remain, but that is because they only exist as
defaults and do not have a proper Kconfig entry. Those appear to be:

SPIFLASH
DISPLAY_BOARDINFO

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
[trini: rastaban, am43xx_evm_usbhost_boot, am43xx_evm_ethboot updates,
drop DM_USB from MSI_Primo81 as USB_MUSB_SUNXI isn't converted yet to DM]
Signed-off-by: Tom Rini <trini@konsulko.com>
2015-06-25 22:17:55 -04:00
Joe Hershberger
a26cd04920 arch: Make board selection choices optional
By making the board selections optional, every defconfig will include
the board selection when running savedefconfig so if a new board is
added to the top of the list of choices the former top's defconfig will
still be correct.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Acked-by: Stephen Warren <swarren@wwwdotorg.org>
Cc: Tom Rini <trini@konsulko.com>
2015-05-12 18:10:02 -04:00
Daniel Schwierzeck
90b1c9fad7 MIPS: implement device-tree handover to Linux kernel
Add device-tree handover to Linux kernel conforming with MIPS UHI [1].
Register $a0 will be set to the reserved value -2. The address of
the device-tree blob will be stored as KSEG0 address in $a1. $a2 and
$a3 are set to zero.

[1] http://prplfoundation.org/wiki/MIPS_documentation

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-04-24 12:15:34 +02:00
Joe Hershberger
1fd92db83d net: cosmetic: Fix var naming net <-> eth drivers
Update the naming convention used in the network stack functions and
variables that Ethernet drivers use to interact with it.

This cleans up the temporary hacks that were added to this interface
along with the DM support.

This patch has a few remaining checkpatch.pl failures that would be out
of the scope of this patch to fix (drivers that are in gross violation
of checkpatch.pl).

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:33 -06:00
Joe Hershberger
8b2c9a7157 net: Provide a function to get the current MAC address
The current implementation exposes the eth_device struct to code that
needs to access the MAC address.  Add a wrapper function for this to
abstract away the pointer for this operation.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2015-04-18 11:11:10 -06:00
Masahiro Yamada
0a12e6872e generic-board: move __HAVE_ARCH_GENERIC_BOARD to Kconfig
Move the option to Kconfig renaming it to CONFIG_HAVE_GENERIC_BOARD.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Alexey Brodkin <abrodkin@synopsys.com>
2015-03-28 09:03:08 -04:00
Daniel Schwierzeck
eef88dfb3e MIPS: unify CPU code in arch/mips/cpu/
Unify and move code in arch/mips/cpu/mips[32|64]/ to arch/mips/cpu/.
The CPU specific config.mk files need to remain until
CONFIG_STANDALONE_LOAD_ADDR is converted to a global Kconfig symbol.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-30 14:19:58 +01:00
Daniel Schwierzeck
d9a4a6223c MIPS: move au1x00 SoC code to arch/mips/mach-au1x00
Move all au1x00 code out of arch/mips/cpu/mips32 to allow
unification of CPU code in a later patch. The reorganization
of the SoC specific header files will be done in a later patch
series.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
2015-01-30 14:19:58 +01:00
Paul Burton
f1c64a0810 MIPS: handle mips64 ST0_KX bit in mips32 start.S
In preparation for sharing a single copy of start.S between mips32 &
mips64, handle setting the KX bit of the cop0 Status register when the
mips32 start.S is built for mips64.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-30 14:19:58 +01:00
Paul Burton
ab0d002677 MIPS: handle mips64 relocs in mips32 start.S
In preparation for sharing a single copy of start.S between mips32 &
mips64, handle mips64 relocations in the mips32 start.S when built for
mips64.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-30 14:19:58 +01:00
Paul Burton
a39b1cb7f0 MIPS: use asm.h macros in mips32 start.S
Where the mips32 & mips64 implementations of start.S differ in terms of
access sizes & offsets, use the appropriate macros from asm.h to
abstract those differences away. This is in preparation for sharing a
single copy of start.S between mips32 & mips64.

The exception to this is loads of immediates to be written to the cop0
Config register, which is a 32bit register on mips64 and therefore
constants written to it can be loaded as such.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-30 14:19:57 +01:00
Paul Burton
ba21a453a5 malta: IDE support
This patch adds IDE support to the MIPS Malta board. The IDE controller
is enabled after probing the PCI bus and otherwise just makes use of
U-boot generic IDE support.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 13:11:02 +01:00
Paul Burton
8755d50706 MIPS: clear TagLo select 2 during cache init
Current MIPS cores from Imagination Technologies use TagLo select 2 for
the data cache. The architecture requires that it is safe for software
to write to this register even if it isn't present, so take the trivial
option of clearing both selects 0 & 2.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
dd7c72006e MIPS: allow systems to skip loads during cache init
Current MIPS systems do not require that loads be performed to force the
parity of cache lines, a simple invalidate by clearing the tag for each
line will suffice. Thus this patch makes the loads & subsequent second
invalidation conditional upon the CONFIG_SYS_MIPS_CACHE_INIT_RAM_LOAD
option, and defines that for existing mips32 targets. Exceptions are
malta where this is known to be unnecessary, and qemu-mips where caches
are not implemented.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
ca4e833cd6 MIPS: inline mips_init_[id]cache functions
The mips_init_[id]cache functions are small & only called once from a
single callsite. Inlining them allows mips_cache_reset to avoid having
to bother moving arguments around & leaves it a leaf function which is
thus able to simply keep the return address live in the ra register
throughout, simplifying the code.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
ac22feca11 MIPS: refactor cache loops to a macro
Reduce duplication by performing loops through cache tags using an
assembler macro.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
536cb7ce1a MIPS: refactor L1 cache config reads to a macro
Reduce duplication between reading the configuration of the L1 dcache &
icache by performing both using a macro which calculates the appropriate
line & cache sizes from the coprocessor 0 Config1 register.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
4a5d8898bc MIPS: unify cache initialization code
The mips32 & mips64 cache initialization code differs only in that the
mips32 code supports reading the cache size from coprocessor 0 registers
at runtime. Move the more developed mips32 version to a common
arch/mips/lib/cache_init.S & remove the now-redundant mips64 version in
order to reduce duplication. The temporary registers used are shuffled
slightly in order to work for both mips32 & mips64 builds. The RA
register is defined differently to suit mips32 & mips64, but will be
removed by a later commit in the series after further cleanup.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:01 +01:00
Paul Burton
30374f98d1 MIPS: unify cache maintenance functions
Move the more developed mips32 version of the cache maintenance
functions to a common arch/mips/lib/cache.c, in order to reduce
duplication between mips32 & mips64.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:00 +01:00
Paul Burton
2b8bcc5a2f MIPS: avoid .set ISA for cache operations
As a step towards unifying the cache maintenance code for mips32 &
mips64 CPUs, stop using ".set <ISA>" directives in the more developed
mips32 version of the code. Instead, when present make use of the GCC
builtin for emitting a cache instruction. When not present, simply don't
bother with the .set directives since U-boot always builds with
-march=mips32 or higher anyway.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-29 12:55:00 +01:00
Daniel Schwierzeck
e520023882 MIPS: add support for pre-relocation malloc
Implement MIPS specific setup of the gd_t structure to support
pre-relocation malloc. If CONFIG_SYS_MALLOC_F_LEN is specified,
a memory area will be reserved after the initial stack area and
the gd->malloc_base pointer will be initialized.

After this patch the new driver model can be used on MIPS.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:07:23 +01:00
Daniel Schwierzeck
dd82128ef5 MIPS: add support for CONFIG_SYS_INIT_SP_ADDR
Support the existing config option CONFIG_SYS_INIT_SP_ADDR on
MIPS. This allows to move the initial stack to other places
than the beginning of RAM.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:07:16 +01:00
Daniel Schwierzeck
9d638eeab7 MIPS: add Kconfig option for CONFIG_SWAP_IO_SPACE
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:06:51 +01:00
Daniel Schwierzeck
c57dafb5b4 MIPS: replace $(CPU) with Kconfig symbols
Conditionally set head-y and lib-y with boolean Kconfig symbols
for selected CPU. This deprecates the usage of the $(CPU) variable.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:06:04 +01:00
Thomas Langer
a18a477147 MIPS: use common code from lib/time.c
The common code just needs the C0_COUNT as free running counter,
without the need of writing and checking C0_COMPARE.

The function get_tbclk() is still implemented here instead of changing
all places of CONFIG_SYS_MIPS_TIMER_FREQ to CONFIG_SYS_TIMER_RATE.

The change was tested on a MIPS32 system, but as the MIPS64 code
was/is the same, this should be no problem.

Signed-off-by: Thomas Langer <thomas.langer@lantiq.com>
2015-01-21 14:02:49 +01:00
Daniel Schwierzeck
e13a50b34b MIPS: bootm: add bootstage reporting
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:02:49 +01:00
Daniel Schwierzeck
5002d8cc54 MIPS: bootm: prepare a flattened device tree for the kernel
Add the initial code to prepare a flattened device tree for
the kernel like relocating the FDT blob and fixing up the
/chosen and /memory nodes.

The final hand over to the kernel is not yet implemented. After
the community agreed on the MIPS boot interface for device trees,
the corresponding code will be added.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:02:49 +01:00
Daniel Schwierzeck
8cec725ad5 MIPS: bootm: add mem, rd_start and rd_size to kernel command line
If the user wants to boot a kernel without legacy environment,
information like memory size, initrd address and size should be
handed over to the kernel in the command line.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:02:48 +01:00
Daniel Schwierzeck
ca65e5851f MIPS: bootm: refactor preparation of Linux kernel environment
Move preparation of Linux kernel environment in a separate
function and mark it as legacy. Add a Kconfig option to make
that legacy mode configurable.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:02:48 +01:00
Daniel Schwierzeck
25fc664f40 MIPS: bootm: refactor preparation of Linux kernel command line
Move preparation of Linux kernel command line in a separate
function and mark it as legacy. Add a Kconfig option to make
that legacy mode configurable.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2015-01-21 14:02:48 +01:00
Masahiro Yamada
afc366f01b Replace <compiler.h> with <linux/compiler.h>
Including <linux/compiler.h> is enough for general use.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-12-08 09:35:46 -05:00
Daniel Schwierzeck
e19db555b4 Kbuild: introduce Makefile in arch/$ARCH/
Introduce a Makefile under arch/$ARCH/ and include it in the
top Makefile (similar to Linux kernel). This allows further
refactoringi like moving architecture-specific code out of global
makefiles, deprecating config variables (CPU, CPUDIR, SOC) or
deprecating arch/$ARCH/config.mk.

In contrary to Linux kernel, U-Boot defines the ARCH variable by
Kconfig, thus the arch Makefile can only included conditionally
after the top config.mk.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-12-08 09:35:45 -05:00
Daniel Schwierzeck
6cec63d59d MIPS: bootm: remove unused or redundant header files
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-27 16:20:37 +01:00
Daniel Schwierzeck
c9639421fd MIPS: bootm: add missing initramfs relocation
The initramfs is currently only relocated if the user calls
the bootm ramdisk subcommand. If bootm should be used without
subcommands, the arch-specific bootm code needs to implement
the relocation.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-27 16:20:37 +01:00
Daniel Schwierzeck
426f87045c MIPS: remove board.c
After all MIPS boards are switched to generic-board, the
MIPS specific board.c can be removed.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-27 16:20:37 +01:00
Daniel Schwierzeck
6d08e22aca MIPS: fix setup of initial stack frame
To get correct stack walking and backtrace functionality in gdb,
registers fp and ra should be initialized before calling board_init_f
or board_init_r. Thus allocating stack space and zeroing it as it is
currently done in board.c becomes obsolete.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-27 16:20:37 +01:00
Masahiro Yamada
56f31e872e kbuild: use SoC-specific CONFIG to descend into SoC directory
Use "obj-$(CONFIG_FOO) += foo/" where it is possible.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-23 06:49:02 -05:00
Masahiro Yamada
165ecd26f0 kbuild: Descend into SOC directory from CPU directory
Some CPUs of some architectures have SOC directories.
At present, the build system directly descends into SOC directories
from the top Makefile, but it should generally descend into each
directory from its parent directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-23 06:49:02 -05:00
Masahiro Yamada
cba1da495d include: move various macros to include/linux/kernel.h
U-Boot has imported various utility macros from Linux
scattering them to various places without consistency.

In include/common.h are min, max, min3, max3, ARRAY_SIZE, ALIGN,
container_of, DIV_ROUND_UP, etc.
In include/linux/compat.h are min_t, max_t, round_up, round_down,
etc.
We also have duplicated defines of min_t in some *.c files.

Moreover, we are suffering from too cluttered include/common.h.

This commit moves various macros that originate in
include/linux/kernel.h of Linux to their original position.

Note:
This commit simply moves the macros; the macros roundup,
min, max, min2, max3, ARRAY_SIZE are different
from those of Linux at this point.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-20 11:28:25 -05:00
Daniel Schwierzeck
265072ba75 MIPS: add .padding section to linker script
Commit 79fd7e649e

    MIPS: always keep all sections in u-boot ELF binary.

    Always keep all sections in u-boot ELF binary. Move all unneeded
    sections after _end to avoid allocating space in the final binary.
    Also remove .deadcode section which is now obsolete.

removed section .deadcode because the original symptoms were not
visible anymore. Unfortuneatly the binutils bug still exists.

The size of .rel.dyn section is often bigger than needed for all
entries. But objcopy only allocates space as much as required for all
reloc entries. Thus there is a gap between the last entry and
__rel_dyn_end in u-boot.bin. If u-boot is booted from RAM (e.g. in
SPL scenarios) that area could contain garbage data which could lead
to CPU exceptions during relocation.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:18:05 +01:00
Daniel Schwierzeck
837cad1e47 MIPS: refactor setting of compiler options
Refactor and unify all compiler settings in arch/mips/config.mk.
Also add tune flags for each supported CPU type.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:18:05 +01:00
Daniel Schwierzeck
aa45f75eaf MIPS: kconfig: merge targets qemu_mips and qemu_mips64
Now the user can separately select the CPU type. Thus the
targets qemu_mips and qemu_mips64 can be merged to a single
target.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:18:04 +01:00
Daniel Schwierzeck
b9863b6de2 MIPS: kconfig: globally define CONFIG_SYS_CPU for MIPS
Now the user can select the CPU type for each target. Thus
CONFIG_SYS_CPU could be set globally.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:18:04 +01:00
Daniel Schwierzeck
02611cbb7c MIPS: kconfig: add options for CPU type select
Add new Kconfig option to let the user select the targets
CPU type. Each target have to select SUPPORTS_CPU_MIPS[32,64]_R[1,2]
to indicate which CPU types are supported.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:18:03 +01:00
Daniel Schwierzeck
0e1dc3456f MIPS: kconfig: add options for endianess select
Add new Kconfig option to let the user select the targets
endianess. Each target have to select SUPPORTS_BIG_ENDIAN
and/or SUPPORTS_LITTLE_ENDIAN to indicate which endianess
is supported.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-11-01 18:17:22 +01:00
Masahiro Yamada
7bfd5ee117 mips: enable CONFIG_USE_PRIVATE_LIBGCC by default
Without the private libgcc, we need a full multilib toolchain with
different libgcc or multiple toolchains to build all BE/LE and
hard-float/soft-float variants of MIPS boards.  That is not feasible.

This commit allows us to build all the MIPS boards with a single
kernel.org toolchain:

https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.9.0/
x86_64-gcc-4.9.0-nolibc_mips-linux.tar.xz

This change sounds reasonable for most users.  If necessary,
you can disable this option via "make menuconfig" or friends.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-10-23 13:19:15 -04:00
Masahiro Yamada
461be2f96e kconfig: remove redundant "string" type in arch and board Kconfigs
Now the types of CONFIG_SYS_{ARCH, CPU, SOC, VENDOR, BOARD, CONFIG_NAME}
are specified in arch/Kconfig.

We can delete the ones in arch and board Kconfig files.

This commit can be easily reproduced by the following command:

find . -name Kconfig -a ! -path ./arch/Kconfig | xargs sed -i -e '
/config[[:space:]]SYS_\(ARCH\|CPU\|SOC\|\VENDOR\|BOARD\|CONFIG_NAME\)/ {
    N
    s/\n[[:space:]]*string//
}
'

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-09-13 16:43:55 -04:00
Masahiro Yamada
90f984e397 kconfig: delete redundant CONFIG_${ARCH} definition
CONFIG_${ARCH} is defined by Kconfig.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2014-07-30 14:42:02 -04:00
Masahiro Yamada
dd84058d24 kconfig: add board Kconfig and defconfig files
This commit adds:
 - arch/${ARCH}/Kconfig
    provide a menu to select target boards
 - board/${VENDOR}/${BOARD}/Kconfig or board/${BOARD}/Kconfig
    set CONFIG macros to the appropriate values for each board
 - configs/${TARGET_BOARD}_defconfig
    default setting of each board

(This commit was automatically generated by a conversion script
based on boards.cfg)

In Linux Kernel, defconfig files are located under
arch/${ARCH}/configs/ directory.
It works in Linux Kernel since ARCH is always given from the
command line for cross compile.

But in U-Boot, ARCH is not given from the command line.
Which means we cannot know ARCH until the board configuration is done.
That is why all the "*_defconfig" files should be gathered into a
single directory ./configs/.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Simon Glass <sjg@chromium.org>
2014-07-30 08:48:01 -04:00
York Sun
2a1680e30e common/board_f: Initialized global data for generic board
Some platforms (tested on mpc85xx, mpc86xx) use global data before calling
function baord_inti_f(). The data should not be cleared later. Any arch
which uses global data in generic board board_init_f() should define
CONFIG_SYS_GENERIC_GLOBAL_DATA.

Signed-off-by: York Sun <yorksun@freescale.com>
CC: Scott Wood <scottwood@freescale.com>
CC: Simon Glass <sjg@chromium.org>
CC: Albert ARIBAUD <albert.u.boot@aribaud.net>
Acked-by: Simon Glass <sjg@chromium.org>
2014-05-12 15:20:05 -04:00
Masahiro Yamada
8e2615752e bd_info: remove bi_barudrate member from struct bd_info
gd->bd->bi_baudrate is a copy of gd->baudrate.

Since baudrate is a common feature for all architectures,
keep gd->baudrate only.

It is true that bi_baudrate was passed to the kernel in that structure
but it was a long time ago.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Rini <trini@ti.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Acked-by: Michal Simek <monstr@monstr.eu> (For microblaze)
2014-05-12 15:19:45 -04:00
Daniel Schwierzeck
538cf92c8c MIPS: drop incaip board
This is dead hardware and no one is interested in making the
necessary changes for upcoming features like generic board or
driver model.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Wolfgang Denk <wd@denx.de>
2014-04-20 13:16:43 +02:00
Paul Burton
9f0868fffb MIPS: allow use of generic board
This patch allows MIPS boards to make use of generic board, replacing
arch/mips/lib/board.c with common/board_{f,r}.c and struct bd_info with
the asm-generic version.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-04-20 13:16:43 +02:00
Paul Burton
a0af08b9db MIPS: define __init_end in u-boot.lds
The generic board code uses the __init_end symbol to calculate
monitor_flash_len. Define said symbol for MIPS, equivalent to
__image_copy_end which is used for the same purpose in
arch/mips/lib/board.c.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-04-20 13:16:43 +02:00
Paul Burton
11a932fb18 MIPS: move mips_io_port_base out of board.c
Move the definition of this variable out of arch/mips/lib/board.c in
preparation for allowing use of generic board on MIPS, which will lead
to this file not being compiled.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-04-20 13:16:42 +02:00
Paul Burton
186d8159f6 MIPS: stub interrupt_init function
interrupt_init is called unconditionally by the generic board code.
Define a stub for it on MIPS like the enable & disable functions.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
2014-04-20 13:16:42 +02:00
Masahiro Yamada
7e3d473b5e mips: xburst: remove remainders of dead board
Commit 54e458de deleted qi_lb60 board support
because of the incompatible license issue.

There is no board with XBurst CPU.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-04-20 13:16:42 +02:00
Daniel Schwierzeck
79fd7e649e MIPS: always keep all sections in u-boot ELF binary.
Always keep all sections in u-boot ELF binary. Move all unneeded
sections after _end to avoid allocating space in the final binary.
Also remove .deadcode section which is now obsolete.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-04-20 13:16:42 +02:00
Stephen Warren
eb838e7d84 usb: create common header virtual root hub descriptors
Many USB host controller drivers contain almost identical copies of the
same virtual root hub descriptors. Put these into a common file to avoid
duplication.

Note that there were some very minor differences between the descriptors
in the various files, such as:

- USB 1.0 vs. USB 1.1
- Manufacturer/Device ID
- Max packet size
- String content

I assume these aren't relevant.

Cc: Thomas Lange <thomas@corelatus.se>
Cc: Shinya Kuribayashi <skuribay@pobox.com>
Cc: Gary Jennejohn <garyj@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Eric Millbrandt <emillbrandt@coldhaus.com>
Cc: Pierre Aubert <p.aubert@staubli.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Cc: Denis Peter <d.peter@mpl.ch>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: Zhang Wei <wei.zhang@freescale.com>
Cc: Mateusz Zalega <m.zalega@samsung.com>
Cc: Remy Bohmer <linux@bohmer.net>
Cc: Markus Klotzbuecher <mk@denx.de>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Gary Jennejohn <garyj@denx.de>
Cc: C Nauman <cnauman@diagraph.com>
Cc: David Müller <d.mueller@elsoft.ch>
Cc: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Thomas Abraham <t-abraham@ti.com>
Cc: Tom Rini <trini@ti.com>
Cc: Andrew Murray <amurray@embedded-bits.co.uk>
Cc: Matej Frančeškin <matej.franceskin@comtrade.com>
Cc: Cliff Cai <cliff.cai@analog.com>
Cc: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Stephen Warren <swarren@wwwdotorg.org>
2014-03-10 18:53:36 +01:00
Masahiro Yamada
cfda6bd2d8 mips: move CONFIG_MIPS{32, 64} definition to config.mk
All mips32 boards define CONFIG_MIPS32 in config headers
except malta boards which define it in boards.cfg.
We can consolidate them by defining it in
arch/mips/cpu/mips32/config.mk.

CONFIG_MIPS64 definition can be moved to
arch/mips/cpu/mips64/config.mk as well.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Acked-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-03-07 10:59:06 -05:00
Masahiro Yamada
a0a15b441c config.mk: specify the exact path to standalone linker script
We want to change the build system to include config.mk
only from ./Makefile and spl/Makefile.
We must prepare for that in this commit.

$(src) is a moving target and not handy for our purpose.
We must replace it with a fixed path.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-03-07 10:59:06 -05:00
Masahiro Yamada
cd2e46cb38 kbuild: add CONFIG_ prefix to USE_PRIVATE_LIBGCC
Before this commit, USE_PRIVATE_LIBGCC was defined in
arch-specific config.mk and referenced in
arch/$(ARCH)/lib/Makefile.

We are not happy about parsing config.mk again and again.
We have to keep the same behavior with a different way.

By adding "CONFIG_" prefix, this macro appears
in include/autoconf.mk, include/spl-autoconf.mk.
(And treating USE_PRIVATE_LIBGCC as CONFIG macro
is reasonable enough.)

Tegra SoC family defined USE_PRIVATE_LIBGCC as "yes"
in arch/arm/cpu/arm720t/tegra*/config.mk,
whereas did not define it in arch/arm/cpu/armv7/tegra*/config.mk.

It means Tegra enables PRIVATE_LIBGCC only for SPL.
We can describe the same behavior by adding

  #ifdef CONFIG_SPL_BUILD
  # define CONFIG_USE_PRIVATE_LIBGCC
  #endif

to include/configs/tegra-common.h.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Stephen Warren <swarren@nvidia.com>
2014-03-07 10:59:06 -05:00
Tom Rini
32907339c2 Merge branch 'master' of git://git.denx.de/u-boot-mips 2014-03-04 18:13:06 -05:00
Daniel Schwierzeck
37f93f7b79 MIPS: fix types u64 and __u64 to unsigned long long
Linux MIPS uses asm-generic/int-ll64.h in asm/types.h.
Thus u64 and __u64 are defined as unsigned long long. Port this
over to U-Boot.

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
2014-03-04 23:18:00 +01:00
Masahiro Yamada
9b6e2c363f kbuild: fix CROSS_COMPILE settings in config.mk
The syntax
  CROSS_COMIPLE ?= <cross_compiler_prefix>
does not work because config.mk is parsed after
exporting CROSS_COMPILE.

Like Linux Kernel's arch/$(ARCH)/Makefile,
we must write as follows:

  ifeq ($(CROSS_COMPILE),)
  CROSS_COMPILE := <cross_compiler_prefix>
  endif

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-03-04 12:15:30 -05:00
Masahiro Yamada
95ddcd68ab kbuild: rename OBJCFLAGS to OBJCOPYFLAGS
Rename OBJCFLAGS to OBJCOPYFLAGS beforehand to use
"cmd_objcopy" in scripts/Makefile.lib in an upcoming commit.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-02-25 11:01:28 -05:00
Masahiro Yamada
9e4140329e kbuild: change out-of-tree build
This commit changes the working directory
where the build process occurs.

Before this commit, build process occurred under the source
tree for both in-tree and out-of-tree build.

That's why we needed to add $(obj) prefix to all generated
files in makefiles like follows:
  $(obj)u-boot.bin:  $(obj)u-boot

Here, $(obj) is empty for in-tree build, whereas it points
to the output directory for out-of-tree build.

And our old build system changes the current working directory
with "make -C <sub-dir>" syntax when descending into the
sub-directories.

On the other hand, Kbuild uses a different idea
to handle out-of-tree build and directory descending.

The build process of Kbuild always occurs under the output tree.
When "O=dir/to/store/output/files" is given, the build system
changes the current working directory to that directory and
restarts the make.

Kbuild uses "make -f $(srctree)/scripts/Makefile.build obj=<sub-dir>"
syntax for descending into sub-directories.
(We can write it like "make $(obj)=<sub-dir>" with a shorthand.)
This means the current working directory is always the top
of the output directory.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Tested-by: Gerhard Sittig <gsi@denx.de>
2014-02-19 11:07:50 -05:00