I checked the archive found the thread "Idea: Move kernel to upper memory". But what is discussed there is much more general about general memory layout. Here I wanted to speak about just one function. Vladimir 'phcoder' Serbinenko Robert Millan wrote: > On Fri, Sep 05, 2008 at 07:27:51PM +0200, phcoder wrote: >> Hello. A long time ago I written a C+asm code which loads any given code >> at any real-mode location, then puts machine in correct state and then >> launches the kernel. I can modify this code to suit GRUB2. Then loading >> realmode kernel would work like this: >> 1) copy helper asm to last kb of lower memory >> 2) jump to the helper >> 3) helper copies from upper memory the kernel >> 4) turn A10 bug back on if necessary >> 5) go to RM >> 6) prepare registers >> 7) jump to the kernel >> >> This protocol is very flexible and as such could be used by all loaders >> which load kernel in realmode or even in PM (skip step 5, do steps 6-7 >> in 32-bit mode) except for changing page tables. Such a helper can be >> easily implemented as module and so help us removing asm-parts of >> loaders from the kernel. If I recieve greenlight for it, I implement it. > > Maybe I'm confusing this with something else, but isn't this what both Bean > and Vesa implemented separately, and are currently discussing in another > thread? > > (the goal there was to move BIOS wrappers out of kern/i386/pc/startup.S) >
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