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Diffstat (limited to 'arch/m68k/mach-mcfv4e.dox')
-rw-r--r-- | arch/m68k/mach-mcfv4e.dox | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/arch/m68k/mach-mcfv4e.dox b/arch/m68k/mach-mcfv4e.dox deleted file mode 100644 index c6dc8f6929..0000000000 --- a/arch/m68k/mach-mcfv4e.dox +++ /dev/null @@ -1,39 +0,0 @@ -/* This document is intended to provide the developer with information - * how to integrate a new CPU (MACH) into this part of the barebox tree - */ - -/** @page dev_m68k_mach M68k/Coldfire based CPU (MACH) into the tree - -FIXME - fill in further info about Coldfire and so on. Check code - for compliance with the specs given below - move code otherwise. - -@par What's happens when the reset signal is gone - -@note Code running immediately after reset runs at an address it is not linked - to: "runtime address != link address". You should only use branches and - do not refer to fixed data. This implies the use of assembler code only. - -The M68k CPU starts at lable \<reset\> in one of the corresponding start-*.S -files. After some basic hardware setup it can call a function -\<arch_init_lowlevel\> if not disabled. This call is intended to give all -developers a chance to use a standard reset vector file, but also do some -special things required only on their specific CPU. - -After handling some MMU, Stack or similiar issues, \<board_init_lowlevel\> can -be called (if not disabled). This is a board specific function for SDRAM setup -for example. As its board specific, your can do whatever you need to bring -your board up. As stack is already set to internal core RAM, this routine can -be C. - -@note: You are not allowed to call other code here, because we are not running - at link address. - -When \<board_init_lowlevel\> returns it will be assumed that there is now -working RAM that can be used for all further steps. - -Next step is relocation of barebox itself. It gets copied to the end of -available RAM and the last assembly instruction is a jump to \<start_barebox\>. - -At this point of time: "runtime address == link address". - -*/ |