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Diffstat (limited to 'doc/README.m68k')
| -rw-r--r-- | doc/README.m68k | 66 |
1 files changed, 48 insertions, 18 deletions
diff --git a/doc/README.m68k b/doc/README.m68k index d5accdd..6dea2b5 100644 --- a/doc/README.m68k +++ b/doc/README.m68k @@ -1,7 +1,12 @@ U-Boot for Motorola M68K -Last Update: January 12, 2004 +==================================================================== +History + +August 08,2005; Jens Scharsig <esw@bus-elektronik.de> + MCF5282 implementation without preloader +January 12, 2004; <josef.baumgartner@telex.de> ==================================================================== This file contains status information for the port of U-Boot to the @@ -33,16 +38,8 @@ CPU specific code is located in: cpu/mcf52x2 ----------------------------- CPU specific code is located in: cpu/mcf52x2 -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 -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 CFG_MONITOR_BASE in -include/configs/M5282EVB.h. +The MCF5282 Port no longer needs a preloader and can place in external or +internal FLASH. 3. SUPPORTED BOARDs @@ -67,6 +64,27 @@ Board specific code is located in: board/m5282evb 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 +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 CFG_MONITOR_BASE in +include/configs/M5282EVB.h. + +3.2 BuS EB+MCF-EV123 +--------------------- + +Board specific code is located in: board/bus/EB+MCF-EV123 + +To configure the board, type: + +make EB+MCF-EV123_config for external FLASH +make EB+MCF-EV123_internal_config for internal FLASH + 4. CONFIGURATION OPTIONS/SETTINGS ---------------------------------- @@ -80,7 +98,6 @@ be compiled in. The start address of u-boot must be adjusted in the boards config header file (CFG_MONITOR_BASE) and Makefile (TEXT_BASE) to the load address. - 4.1 MCF5272 specific Options/Settings ------------------------------------- @@ -123,14 +140,27 @@ CFG_INT_FLASH_BASE CFG_ENET_BD_BASE -- defines the base addres of the FEC buffer descriptors +CFG_MFD + -- defines the PLL Multiplication Factor Devider + (see table 9-4 of MCF user manual) +CFG_RFD -- defines the PLL Reduce Frecuency Devider + (see table 9-4 of MCF user manual) + +CFG_CSx_BASE -- defines the base address of chip select x +CFG_CSx_SIZE -- defines the memory size (address range) of chip select x +CFG_CSx_WIDTH -- defines the bus with of chip select x +CFG_CSx_RO -- if set to 0 chip select x is read/wirte + else chipselct is read only +CFG_CSx_WS -- defines the number of wait states of chip select x + +CFG_PxDDR -- defines the contents of the Data Direction Registers +CFG_PxDAT -- defines the contents of the Data Registers +CFG_PXCNT -- defines the contents of the Port Configuration Registers + +CFG_PxPAR -- defines the function of ports + 5. COMPILER ----------- To create U-Boot the gcc-2.95.3 compiler set (m68k-elf-20030314) from uClinux.org was used. You can download it from: http://www.uclinux.org/pub/uClinux/m68k-elf-tools/ - - -Regards, - -Josef -<josef.baumgartner@telex.de> |