u-boot/doc/README.m68k

2 U-Boot for Motorola (or Freescale/NXP) ColdFire processors
8 August   08, 2005	Jens Scharsig <esw@bus-elektronik.de>
14 This file contains status information for the port of U-Boot to the
25 Bernhard Kuhn ported U-Boot 0.4.0 to the Motorola ColdFire architecture.
27 of these patches was that they needed a pre-bootloader to start U-Boot.
31 Thanks mainly to Freescale but also to several other contributors, U-Boot now
32 supports nearly the entire range of ColdFire processors and their related
44 U-Boot supports actually more than 40 ColdFire based boards.
45 Board configuration can be done trough include/configs/<boardname>.h but the
50 specific board please check:
56 It is possible to build all ColdFire boards in a single command-line command,
57 from u-boot root directory, as:
62 3.1. Build U-Boot for a specific board
68 export CROSS_COMPILE=/opt/toolchains/m68k/gcc-4.9.0-nolibc/bin/m68k-linux-
70 board=M5475DFE
73 make ARCH=m68k ${board}_defconfig
80 https://www.denx.de/wiki/U-Boot/ColdFireNotes
86 5.1. Configuration to use a pre-loader
88 If U-Boot should be loaded to RAM and started by a pre-loader
91 be compiled in. The start address of U-Boot must be adjusted in
100 CONFIG_MCF52x2	-- defined for all MCF52x2 CPUs
101 CONFIG_M5272	-- defined for all Motorola MCF5272 CPUs
106 CONFIG_SYS_MBAR	-- defines the base address of the MCF5272 configuration
109 		-- defines the base address of the FEC buffer descriptors
110 CONFIG_SYS_SCR	-- defines the contents of the System Configuration Register
111 CONFIG_SYS_SPR	-- defines the contents of the System Protection Register
112 CONFIG_SYS_MFD	-- defines the PLL Multiplication Factor Divider
113 		   (see table 9-4 of MCF user manual)
114 CONFIG_SYS_RFD	-- defines the PLL Reduce Frequency Devider
115 		   (see table 9-4 of MCF user manual)
117 		-- defines the base address of chip select x
119 		-- defines the memory size (address range) of chip select x
121 		-- defines the bus with of chip select x
123 		-- defines the mask for the related chip select x
125 		-- if set to 0 chip select x is read/write else chip select
128 		-- defines the number of wait states  of chip select x
132 		-- cache-related registers config
141 		-- SDRAM config for SDRAM controller-specific registers, please
145 		-- defines enabling of ColdFire UART driver
147 		-- defines the UART port to be used (only a single UART can be
150 		-- size of the prepended SBF header, if any