lfn
serial
ticket/834-toolchain-update
topic/msim-upgrade
topic/simplify-dev-export
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Last change
on this file since f5075fa was f761f1eb, checked in by Jakub Jermar <jakub@…>, 21 years ago |
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| 1 | SPARTAN kernel currently supports emulated MIPS R4000 32-bit
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| 2 | little-endian architecture. In other words, it can only run in MIPS
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| 3 | R4000 emulator called msim. This emulator is being developed by Viliam
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| 4 | Holub:
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| 5 |
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| 6 | http://nenya.ms.mff.cuni.cz/~holub/msim
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| 7 |
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| 8 | Note that msim diverges from real MIPS hardware in some aspects.
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| 9 | Therefore, some non-trivial changes will be necessary for a real
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| 10 | hardware port. The simulator is described in this manual:
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| 11 |
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| 12 | http://nenya.ms.mff.cuni.cz/~holub/msim/msim.ps
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| 13 |
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| 14 | You'll need a msim.conf script like this:
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| 15 |
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| 16 | #
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| 17 | # MSIM configuration script
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| 18 | #
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| 19 |
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| 20 | add dcpu mips1
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| 21 |
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| 22 | add rwm mainmem 0 16M load "kernel.bin"
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| 23 | add rom startmem 0x1fc00000 1k load "load.bin"
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| 24 |
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| 25 | add dprinter printer 0xA000000
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| 26 |
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| 27 |
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| 28 |
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| 29 | BOOTSTRAP
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| 30 | =========
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| 31 | Because the mips port uses binary executable format and for some other
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| 32 | architectural reasons, it shares one address for bootstrap entry
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| 33 | (address where control is passed from loader) and for TLB refill
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| 34 | exception entry. The former is used only once during system bootstrap.
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| 35 | From that point further, only TLB refill exception entry uses that
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| 36 | address. Note that this is the reason why main_bsp() is called from
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| 37 | tlb_refill() code.
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