Bernhard Kuhn ported U-Boot 0.4.0 to the Motorola Coldfire
architecture. The patches of Bernhard support the MCF5272 and
MCF5282. A great disadvantage of these patches was that they needed
-a pre-bootloader to start u-boot. Because of this, a new port was
+a pre-bootloader to start U-Boot. Because of this, a new port was
created which no longer needs a first stage booter.
Although this port is intended to cover all M68k processors, only
2.1 Motorola Coldfire MCF5272
-----------------------------
-CPU specific code is located in: cpu/mcf52x2
+CPU specific code is located in: arch/m68k/cpu/mcf52x2
2.1 Motorola Coldfire MCF5282
-----------------------------
-CPU specific code is located in: cpu/mcf52x2
+CPU specific code is located in: arch/m68k/cpu/mcf52x2
The MCF5282 Port no longer needs a preloader and can place in external or
internal FLASH.
U-Boot Memory Map:
------------------
-0xffe00000 - 0xffe3ffff u-boot
-0xffe04000 - 0xffe05fff environment (embedded in u-boot!)
+0xffe00000 - 0xffe3ffff U-Boot
+0xffe04000 - 0xffe05fff environment (embedded in U-Boot!)
0xffe40000 - 0xffffffff free for linux/applications
To configure the board, type: make M5272C3_config
At the moment the code isn't fully implemented and still needs a pre-loader!
-The preloader must initialize the processor and then start u-boot. The board
+The preloader must initialize the processor and then start U-Boot. The board
must be configured for a pre-loader (see 4.1)
For the preloader, please see
http://mailman.uclinux.org/pipermail/uclinux-dev/2003-December/023384.html
-U-boot is configured to run at 0x20000 at default. This can be configured by
-change TEXT_BASE in board/m5282evb/config.mk and CONFIG_SYS_MONITOR_BASE in
+U-Boot is configured to run at 0x20000 at default. This can be configured by
+change CONFIG_SYS_TEXT_BASE in board/m5282evb/config.mk and CONFIG_SYS_MONITOR_BASE in
include/configs/M5282EVB.h.
3.2 BuS EB+MCF-EV123
4.1 Configuration to use a pre-loader
-------------------------------------
-If u-boot should be loaded to RAM and started by a pre-loader
+If U-Boot should be loaded to RAM and started by a pre-loader
CONFIG_MONITOR_IS_IN_RAM must be defined. If it is defined the
initial vector table and basic processor initialization will not
-be compiled in. The start address of u-boot must be adjusted in
+be compiled in. The start address of U-Boot must be adjusted in
the boards config header file (CONFIG_SYS_MONITOR_BASE) and Makefile
-(TEXT_BASE) to the load address.
+(CONFIG_SYS_TEXT_BASE) to the load address.
4.1 MCF5272 specific Options/Settings
-------------------------------------
CONFIG_M5272 -- defined for all Motorola MCF5272 CPUs
CONFIG_MONITOR_IS_IN_RAM
- -- defined if u-boot is loaded by a pre-loader
+ -- defined if U-Boot is loaded by a pre-loader
CONFIG_SYS_MBAR -- defines the base address of the MCF5272 configuration registers
CONFIG_SYS_INIT_RAM_ADDR
-- defines the base address of the MCF5272 internal SRAM
CONFIG_SYS_ENET_BD_BASE
- -- defines the base addres of the FEC buffer descriptors
+ -- defines the base address of the FEC buffer descriptors
CONFIG_SYS_SCR -- defines the contents of the System Configuration Register
CONFIG_SYS_SPR -- defines the contents of the System Protection Register
CONFIG_M5282 -- defined for all Motorola MCF5282 CPUs
CONFIG_MONITOR_IS_IN_RAM
- -- defined if u-boot is loaded by a pre-loader
+ -- defined if U-Boot is loaded by a pre-loader
CONFIG_SYS_MBAR -- defines the base address of the MCF5282 internal register space
CONFIG_SYS_INIT_RAM_ADDR
CONFIG_SYS_INT_FLASH_BASE
-- defines the base address of the MCF5282 internal Flash memory
CONFIG_SYS_ENET_BD_BASE
- -- defines the base addres of the FEC buffer descriptors
+ -- defines the base address of the FEC buffer descriptors
CONFIG_SYS_MFD
-- defines the PLL Multiplication Factor Devider