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diff --git a/qemu/roms/u-boot/doc/README.m68k b/qemu/roms/u-boot/doc/README.m68k deleted file mode 100644 index c85febc1f..000000000 --- a/qemu/roms/u-boot/doc/README.m68k +++ /dev/null @@ -1,166 +0,0 @@ - -U-Boot for Motorola M68K - -==================================================================== -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 -Motorola M68K series of CPUs. - -1. OVERVIEW ------------ -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 -created which no longer needs a first stage booter. - -Although this port is intended to cover all M68k processors, only -the parts for the Motorola Coldfire MCF5272 and MCF5282 are -implemented at the moment. Additional CPUs and boards will be -hopefully added soon! - - -2. SUPPORTED CPUs ------------------ - -2.1 Motorola Coldfire MCF5272 ------------------------------ -CPU specific code is located in: arch/m68k/cpu/mcf52x2 - - -2.1 Motorola Coldfire MCF5282 ------------------------------ -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. - - -3. SUPPORTED BOARDs -------------------- - -3.1 Motorola M5272C3 EVB ------------------------- -Board specific code is located in: board/m5272c3 - -To configure the board, type: make M5272C3_config - -U-Boot Memory Map: ------------------- -0xffe00000 - 0xffe3ffff u-boot -0xffe04000 - 0xffe05fff environment (embedded in u-boot!) -0xffe40000 - 0xffffffff free for linux/applications - - -3.2 Motorola M5282 EVB ------------------------- -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 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 ---------------------- - -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 ----------------------------------- - -4.1 Configuration to use 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 -the boards config header file (CONFIG_SYS_MONITOR_BASE) and Makefile -(CONFIG_SYS_TEXT_BASE) to the load address. - -4.1 MCF5272 specific Options/Settings -------------------------------------- - -CONFIG_MCF52x2 -- defined for all MCF52x2 CPUs -CONFIG_M5272 -- defined for all Motorola MCF5272 CPUs - -CONFIG_MONITOR_IS_IN_RAM - -- 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 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_SYS_BRx_PRELIM -- defines the contents of the Chip Select Base Registers -CONFIG_SYS_ORx_PRELIM -- defines the contents of the Chip Select Option Registers - -CONFIG_SYS_PxDDR -- defines the contents of the Data Direction Registers -CONFIG_SYS_PxDAT -- defines the contents of the Data Registers -CONFIG_SYS_PXCNT -- defines the contents of the Port Configuration Registers - - -4.2 MCF5282 specific Options/Settings -------------------------------------- - -CONFIG_MCF52x2 -- defined for all MCF52x2 CPUs -CONFIG_M5282 -- defined for all Motorola MCF5282 CPUs - -CONFIG_MONITOR_IS_IN_RAM - -- 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 - -- defines the base address of the MCF5282 internal SRAM -CONFIG_SYS_INT_FLASH_BASE - -- defines the base address of the MCF5282 internal Flash memory -CONFIG_SYS_ENET_BD_BASE - -- defines the base address of the FEC buffer descriptors - -CONFIG_SYS_MFD - -- defines the PLL Multiplication Factor Devider - (see table 9-4 of MCF user manual) -CONFIG_SYS_RFD -- defines the PLL Reduce Frecuency Devider - (see table 9-4 of MCF user manual) - -CONFIG_SYS_CSx_BASE -- defines the base address of chip select x -CONFIG_SYS_CSx_SIZE -- defines the memory size (address range) of chip select x -CONFIG_SYS_CSx_WIDTH -- defines the bus with of chip select x -CONFIG_SYS_CSx_RO -- if set to 0 chip select x is read/wirte - else chipselct is read only -CONFIG_SYS_CSx_WS -- defines the number of wait states of chip select x - -CONFIG_SYS_PxDDR -- defines the contents of the Data Direction Registers -CONFIG_SYS_PxDAT -- defines the contents of the Data Registers -CONFIG_SYS_PXCNT -- defines the contents of the Port Configuration Registers - -CONFIG_SYS_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/ |