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Diffstat (limited to 'board/netstal/hcu5/README.txt')
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1 files changed, 0 insertions, 171 deletions
diff --git a/board/netstal/hcu5/README.txt b/board/netstal/hcu5/README.txt deleted file mode 100644 index c5737d0..0000000 --- a/board/netstal/hcu5/README.txt +++ /dev/null @@ -1,171 +0,0 @@ -HCU5 configuration details and startup sequence - -(C) Copyright 2007 Netstal Maschinen AG - Niklaus Giger (Niklaus.Giger@netstal.com) - -TODO: ------ -- Fix error: Waiting for PHY auto negotiation to complete..... TIMEOUT ! - - Does not occur if both EMAC are connected -- Fix RTS/CTS problem (HW?) - CONFIG_SERIAL_MULTI/CONFIG_SERIAL_SOFTWARE_FIFO hangs after - Switching to interrupt driven serial input mode - -Caveats: --------- -Errata CHIP_8: Incorrect Write to DDR SDRAM. (was not applied to sequoia.c) -see hcu5.c. - - -Memory Bank 0 -- Flash chip ---------------------------- - -0xfff00000 - 0xffffffff - -The flash chip is really only 512Kbytes, but the high address bit of -the 1Meg region is ignored, so the flash is replicated through the -region. Thus, this is consistent with a flash base address 0xfff80000. - -The placement at the end is to be consistent with reset behavior, -where the processor itself initially uses this bus to load the branch -vector and start running. - -On-Chip Memory --------------- - -0xe0010000- 0xe0013fff CONFIG_SYS_OCM_BASE -The 440EPx includes a 16K on-chip memory that can be placed however -software chooses. - -Internal Peripherals --------------------- - -0xef600300 - 0xef6008ff - -These are scattered various peripherals internal to the PPC440EPX -chip. - -Chip-Select 2: Flash Memory ---------------------------- - -Not used - -Chip-Select 3: CAN Interface ----------------------------- -0xc800000: 2 Intel 82527 CAN-Controller - - -Chip-Select 4: IMC-bus standard -------------------------------- - -0xcc00000: Netstal specific IO-Bus - - -Chip-Select 5: IMC-bus fast (inactive) --------------------------------------- - -0xce00000: Netstal specific IO-Bus (fast, but not yet used) - - -Memory Bank 1 -- DDR2 -------------------------------------- - -0x00000000 - 0xfffffff # Default 256 MB - -PCI ?? - -USB ?? -Only USB_STORAGE is enabled to load vxWorks -from a memory stick. - -System-LEDs ??? (Analog zu HCU4 ???) - -Startup sequence ----------------- - -(arch/powerpc/cpu/ppc4xx/resetvec.S) -depending on configs option -call _start_440 _start_pci oder _start - -(arch/powerpc/cpu/ppc4xx/start.S) - -_start_440: - initialize register like - CCR0 - debug - setup interrupt vectors - configure cache regions - clear and setup TLB - enable internal RAM - jump start_ram - which in turn will jump to start -_start: - Clear and set up some registers. - Debug setup - Setup the internal SRAM - Setup the stack in internal SRAM - setup stack pointer (r1) - setup GOT - call cpu_init_f /* run low-level CPU init code (from Flash) */ - - call cpu_init_f - board_init_f: (arch/powerpc/lib\board.c) - init_sequence defines a list of function to be called - board_early_init_f: (board/netstal/hcu5/hcu5.c) - We are using Bootstrap-Option A - if CPR0_ICFG_RLI_MASK == 0 then set some registers and reboot - Setup the GPIO pins - Setup the interrupt controller polarities, triggers, etc. - Ethernet, PCI, USB enable - setup BOOT FLASH (Chip timing) - init_baudrate, - serial_init - checkcpu - misc_init_f #ifdef - init_func_i2c #ifdef - post_init_f #ifdef - init_func_ram -> calls init_dram board/netstal/hcu5/sdram.c - (EYE function removed!!) - test_dram call - - * Reserve memory at end of RAM for (top down in that order): - * - kernel log buffer - * - protected RAM - * - LCD framebuffer - * - monitor code - * - board info struct - Save local variables to board info struct - call relocate_code() does not return - relocate_code: (arch/powerpc/cpu/ppc4xx/start.S) -------------------------------------------------------- -From now on our copy is in RAM and we will run from there, - starting with board_init_r -------------------------------------------------------- - board_init_r: (arch/powerpc/lib\board.c) - setup bd function pointers - trap_init - flash_init: (board/netstal/hcu5/flash.c) - /* setup for u-boot erase, update */ - setup bd flash info - cpu_init_r: (arch/powerpc/cpu/ppc4xx/cpu_init.c) - peripheral chip select in using defines like - CONFIG_SYS_EBC_PB0A, CONFIG_SYS_EBC_PB0C from hcu5.h - mem_malloc_init - malloc_bin_reloc - spi_init (r or f)??? (CONFIG_ENV_IS_IN_EEPROM) - env_relocated - misc_init_r(bd): (board/netstal/hcu5.c) - ethaddr mit serial number ergänzen - Then we will somehow go into the command loop - -Most of the HW specific code for the HCU5 may be found in -include/configs/hcu5.h -board/netstal/hcu5/* -arch/powerpc/cpu/ppc4xx/* -arch/powerpc/lib/* -include/ppc440.h - -Drivers for serial etc are found under drivers/ - -Don't ask question if you did not look at the README !! -Most CONFIG_SYS_* and CONFIG_* switches are mentioned/explained there. |