0,0 → 1,37 |
SPARTAN kernel currently supports emulated MIPS R4000 32-bit |
little-endian architecture. In other words, it can only run in MIPS |
R4000 emulator called msim. This emulator is being developed by Viliam |
Holub: |
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http://nenya.ms.mff.cuni.cz/~holub/msim |
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Note that msim diverges from real MIPS hardware in some aspects. |
Therefore, some non-trivial changes will be necessary for a real |
hardware port. The simulator is described in this manual: |
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http://nenya.ms.mff.cuni.cz/~holub/msim/msim.ps |
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You'll need a msim.conf script like this: |
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# |
# MSIM configuration script |
# |
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add dcpu mips1 |
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add rwm mainmem 0 16M load "kernel.bin" |
add rom startmem 0x1fc00000 1k load "load.bin" |
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add dprinter printer 0xA000000 |
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BOOTSTRAP |
========= |
Because the mips port uses binary executable format and for some other |
architectural reasons, it shares one address for bootstrap entry |
(address where control is passed from loader) and for TLB refill |
exception entry. The former is used only once during system bootstrap. |
From that point further, only TLB refill exception entry uses that |
address. Note that this is the reason why main_bsp() is called from |
tlb_refill() code. |