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Diffstat (limited to 'contrib/baremetal/marini.txt')
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diff --git a/contrib/baremetal/marini.txt b/contrib/baremetal/marini.txt deleted file mode 100644 index 464f1488..00000000 --- a/contrib/baremetal/marini.txt +++ /dev/null @@ -1,52 +0,0 @@ -From: "Paolo Marini" <paolom@prisma-eng.it> -Subject: Etherboot on bare metal -Date: Tue, 10 Apr 2001 23:19:19 +0200 -Organization: Prisma Engineering srl - -Hi Ken, -I have ported Etherboot on an embedded, biosless platform and would like -to contribute the code. - -Essentially, the hardware I was running Etherboot is a Pentium based -embedded system, with an Intel Chipset, *but* without serial, VGA, -keyboard etc., only an 82559 Intel (custom) Ethernet controller (I debug -it with the etheral Ethernet packet analyser and an emulator). - -What I did was: - - a.. integrate the init.s file within the firmware, with GDT -(re)initialisation (a simple and single entry point taking control of -the boot process) - b.. provide some stupid BIOS stubs in order to let the OS boot and -still belive that an INT10 call goes to the BIOS - c.. provide some basic functions to Etherboot, like timer (I used the -Pentium TSC internal counter) - d.. hardwire in the code information about the RAM size -The BIOS stubs are enough to boot Linux, pSOS and QNX with bootp. QNX is -somewhat difficult to load, because the i82559 driver tries to find the -component using the BIOS32 calls, so I had to patch it. - -what i I got from the original firmware is the PCI initialisation and -resource (I/O, interrupts, memory) allocation. - -I send you what I changed, that is, the initialisation code and the -misc.c file containing the timer, and the makefile (I don't remember -exactly the options I used to compile all). - -Of course, it is only a good starting point for anyone wanting to -implement a bootp client on a biosless platform; some integration work -still needs to be done. - -Ciao -Paolo - -And in a subsequent email: - -I worked with version 4.6.12, but the real modifications involve the -init.S file, which I think is quite sstable between releases. I forgot -to say that my entry point (symbol _start in init.s) assumes the -processor is already in protected mode. - -[The only difference between main.c and misc.c from those in Etherboot -4.6.12 seems to be the deletion of eth_reset(). This may be of use to -others trying to make these changes work on more recent releases. Ken] |