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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
..
Makefile kbuild: change out-of-tree build 2014-02-19 11:07:50 -05:00
README.mvblm7 doc: cleanup - move board READMEs into respective board directories 2012-07-29 15:42:02 +02:00
bootscript mpc83xx/mvBLM7: add usb commands and cleanup. 2010-05-07 12:20:15 -05:00
fpga.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
fpga.h Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
mvblm7.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00
mvblm7.h Use common code for Matrix Vision boards 2009-08-28 00:31:23 +02:00
pci.c Add GPL-2.0+ SPDX-License-Identifier to source files 2013-07-24 09:44:38 -04:00

README.mvblm7 

Matrix Vision mvBlueLYNX-M7 (mvBL-M7)
-------------------------------------

1.	Board Description

	The mvBL-M7 is a 120x120mm single board computing platform
	with strong focus on stereo image processing applications.

	Power Supply is either VDC 12-48V or Pover over Ethernet (PoE)
	on any port (requires add-on board).

2	System Components

2.1	CPU
	Freescale MPC8343VRAGDB CPU running at 400MHz core and 266MHz csb.
	512MByte DDR-II memory @ 133MHz.
	8 MByte Nor Flash on local bus.
	2 Vitesse VSC8601 RGMII ethernet Phys.
	1 USB host controller over ULPI I/F.
	2 serial ports. Console running on ttyS0 @ 115200 8N1.
	1 SD-Card slot connected to SPI.
	System configuration (HRCW) is taken from I2C EEPROM.

2.2	PCI
	A miniPCI Type-III socket is present. PCI clock fixed at 66MHz.

2.3	FPGA
	Altera Cyclone-II EP2C20/35 with PCI DMA engines.
	Connects to dual Matrix Vision specific CCD/CMOS sensor interfaces.
	Utilizes another 256MB DDR-II memory and 32-128MB Nand Flash.

2.3.1	I/O @ FPGA
	2x8 Outputs : Infineon High-Side Switches to Main Supply.
	2x8 Inputs  : Programmable input threshold + trigger capabilities
	2 dedicated flash interfaces for illuminator boards.
	Cross trigger for chaining several boards.

2.4	I2C
	Bus1:
		MAX5381 DAC @ 0x60 for 1st digital input threshold.
		LM75 @ 0x90 for temperature monitoring.
		EEPROM @ 0xA0 for system setup (HRCW etc.) + vendor specifics.
		1st image sensor interface (slave addresses depend on sensor)
	Bus2:
		MAX5381 DAC @ 0x60 for 2nd digital input threshold.
		2nd image sensor interface (slave addresses depend on sensor)

3	Flash layout.

	reset vector is 0xFFF00100, i.e. "HIGHBOOT".

	FF800000	environment
	FF802000	redundant environment
	FF804000	u-boot script image
	FF806000	redundant u-boot script image
	FF808000	device tree blob
	FF80A000	redundant device tree blob
	FF80C000	tbd.
	FF80E000	tbd.
	FF810000	kernel
	FFC00000	root FS
	FFF00000	u-boot
	FFF80000	FPGA raw bit file

	mtd partitions are propagated to linux kernel via device tree blob.

4	Booting

	On startup the bootscript @ FF804000 is executed. This script can be
	exchanged easily. Default boot mode is "boot from flash", i.e. system
	works stand-alone.

	This behaviour depends on some environment variables :

	"netboot" : yes ->try dhcp/bootp and boot from network.
	A "dhcp_client_id" and "dhcp_vendor-class-identifier" can be used for
	DHCP server configuration, e.g. to provide different images to
	different devices.

	During netboot the system tries to get 3 image files:
	1. Kernel - name + data is given during BOOTP.
	2. Initrd - name is stored in "initrd_name"
	3. device tree blob - name is stored in "dtb_name"
	Fallback files are the flash versions.